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WO2017031643A1 - Attribution de ressources, instruction et reconnaissance de type de ressources, et procédés et appareils de réception de données - Google Patents

Attribution de ressources, instruction et reconnaissance de type de ressources, et procédés et appareils de réception de données Download PDF

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Publication number
WO2017031643A1
WO2017031643A1 PCT/CN2015/087852 CN2015087852W WO2017031643A1 WO 2017031643 A1 WO2017031643 A1 WO 2017031643A1 CN 2015087852 W CN2015087852 W CN 2015087852W WO 2017031643 A1 WO2017031643 A1 WO 2017031643A1
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WIPO (PCT)
Prior art keywords
resource
time
frequency
coverage level
schedulable
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PCT/CN2015/087852
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English (en)
Chinese (zh)
Inventor
冯淑兰
刘劲楠
李强
吴毅凌
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华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2015/087852 priority Critical patent/WO2017031643A1/fr
Priority to CN201580067796.5A priority patent/CN107113796A/zh
Publication of WO2017031643A1 publication Critical patent/WO2017031643A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • the present invention relates to the field of information processing technologies, and in particular, to a resource allocation, indication and identification resource type, and method and device for receiving data.
  • the IoT service of massive and small data packets has gradually become the main business of wireless communication.
  • the user equipment is divided into different coverage levels (English: Coverage Class; abbreviated as CC), and the modulation and coding modes of the data packets transmitted between the user equipments with different coverage levels and the base station are different, and the data is carried.
  • the resources of the package are also different.
  • the IoT communication system strictly divides the time-frequency resources into multiple parts, and each part of the resources corresponds to one coverage level of the IoT terminal, and cannot allocate time-frequency resources flexibly, and causes time-frequency in some application scenarios. Resources are wasted, for example:
  • An application scenario is as follows: As shown in FIG. 2, the Internet of Things communication system allocates a certain size of time-frequency resources for coverage level 4 (CC4). However, the scheduling of the user equipment in the cell is random. In some subframes, it is not necessary to send a data packet to the user equipment of the CC4, and the resource corresponding to the CC4 can only be vacant. At the same time, it may be necessary to send data packets to user equipment of many other coverage levels (eg, coverage level 1, coverage level 2, or coverage level 3). Obviously, resources corresponding to other coverage levels are not sufficient. As a result, many time-frequency resources of the Internet of Things communication system are wasted.
  • CC4 coverage level 4
  • Another application scenario is as follows: Assume that the user equipment is divided into four coverage levels.
  • the Internet of Things communication system fixedly divides the time-frequency resources into four parts, and each part of the resources corresponds to one coverage level.
  • the coverage sizes of different cells in the IoT communication system are very different, and the transmission conditions of the user equipment are also greatly different.
  • the time-frequency resource is fixedly divided into four parts, the flexibility is insufficient. For example, the coverage of some cells can reach 1000 meters, while the coverage of other cells is only tens of meters, and the transmission conditions of user equipments in the cell are very good. At this time, all user equipments in the cell are coverage level 1. Or 2, there is no user equipment covering levels 3 and 4. If the time-frequency resource is still divided into four parts, obviously, it corresponds to the coverage levels 3 and 4 respectively. Resources are unnecessary, causing waste of time-frequency resources.
  • the Internet of Things communication system is inflexible in the division of time-frequency resources.
  • the embodiments of the present invention provide a resource allocation, an indication and a resource type, and a method and a device for receiving data, which implement flexible allocation of time-frequency resources and improve utilization of time-frequency resources.
  • a first aspect of the embodiments of the present invention provides a method for resource allocation, including:
  • the coverage level corresponds to;
  • the schedulable time-frequency resource of the scheduling period is composed of at least one RU, and the RU is composed of at least one resource element RE, where the RU includes one time slot in the time domain, and includes at least one in the frequency domain.
  • a symbol is included above, and a time-frequency resource of an activated subcarrier is included in the frequency domain.
  • the schedulable time-frequency resource of the scheduling period includes:
  • the remaining resources except the second resource are the remaining resources except the second resource;
  • the first resource is used to carry a physical broadcast channel PBCH
  • the second resource is used to carry a physical synchronization channel PSCH.
  • the remaining resources except the resources carrying the PDCCH in the schedulable time-frequency resources of the scheduling period are determined as resources for carrying the PDSCH.
  • the The number of data packets that need to be sent to the user equipment in the scheduling period, and the resources that carry the data packet are determined from the schedulable time-frequency resources of the scheduling period, including:
  • the resource is composed of at least one CBRU corresponding to the coverage level, including:
  • the number of time slots included in the time domain of the CBRU corresponding to the coverage level is at least one; or
  • the number of the activated subcarriers included in the frequency domain of the CBRU corresponding to the coverage level is at least the same as the number of the activated subcarriers included in the frequency domain of the first resource.
  • the carrying The resource of the data packet is composed of at least one RU.
  • the CBRU corresponding to the coverage level is in the frequency domain.
  • the number of activated subcarriers included is determined according to the number of activated subcarriers included in the frequency domain by the RU.
  • the location of the CBRU corresponding to the coverage level in the schedulable time-frequency resource of the scheduling period, and the device of the user equipment has a corresponding relationship.
  • the eighth possible implementation manner of the first aspect Determining the resource carrying the data packet in the schedulable time-frequency resource of the scheduling period, including:
  • the one The slot includes 17 orthogonal frequency division multiplexed OFDM symbols.
  • the data The package includes:
  • the data packet is: a data packet carrying a physical downlink control channel PDCCH; and/or a data packet carrying a physical downlink shared channel PDSCH.
  • a second aspect of the embodiments of the present invention provides a method for indicating a resource type, including:
  • Determining, by the resource unit, a pilot sequence that is carried by the resource unit, the schedulable time-frequency resource of the scheduling period is composed of at least one of the RUs, where the pilot sequence is used to indicate the type of the schedulable periodic time-frequency resource, the schedulable period a type of a time-frequency resource, including a third resource and a fourth resource, where the third resource is used to carry a physical downlink control channel PDCCH, and the fourth resource is used to carry a physical downlink shared channel PDSCH;
  • the RU is a time-frequency resource that includes one time slot in the time domain, and includes at least one active sub-carrier in the frequency domain,
  • the slot includes at least one symbol, and the RU includes at least one resource element RE.
  • the 15 REs form a group of time-frequency resource groups for carrying pilot sequences
  • One of the pilot sequences is carried in the RU, and the one pilot sequence is carried by the set of time-frequency resource groups for carrying pilot sequences or by at least one group for carrying pilot sequences.
  • the frequency resource group bears jointly; or
  • At least one of the pilot sequences is carried in the RU, and each pilot sequence in the at least one pilot sequence is carried by a group of time-frequency resource groups for carrying pilot sequences or by at least one group Cooperating with a time-frequency resource group carrying a pilot sequence; or
  • the pilot sequence is jointly carried by at least one time-frequency resource group for carrying a pilot sequence in the RU, and each RU of the at least one RU includes at least one group of time-frequency resources for carrying a pilot sequence. group.
  • the pilot sequence indicator The types of time-frequency resources that can be scheduled, including:
  • the pilot sequence indicates a type of the schedulable periodic time-frequency resource
  • the pilot sequence indicates a size of the schedulable periodic time-frequency resource, and different types of schedulable time-frequency resources have different sizes.
  • the pilot sequence is a length a sequence that is an integer multiple of 15;
  • the sequence whose length is an integer multiple of 15 is generated by a ZC sequence, or
  • the sequence whose length is an integer multiple of 15 is generated by the m sequence, or
  • the sequence whose length is an integer multiple of 15 is generated by the Gold sequence.
  • a third aspect of the embodiments of the present invention provides a method for identifying a resource type, including:
  • User equipment UE determines a coverage level of the UE
  • the UE obtains, according to the pilot sequence stored by the UE, a pilot sequence of a schedulable resource bearer in a scheduling period, including:
  • the UE determines, in the at least one pilot sequence that is stored by the UE, a sequence that has the highest correlation with the pilot sequence of the RU that is included in the schedulable resource of the scheduling period, and determines that the scheduling period is a schedulable resource bearer. Pilot sequence.
  • a fourth aspect of the embodiments of the present invention provides a method for receiving a data packet, including:
  • User equipment UE determines a coverage level of the UE
  • the UE receives a data packet of the UE on a predetermined code block resource unit CBRU location in the resource corresponding to the coverage level, where the location of the predetermined CBRU corresponds to the device identifier of the UE.
  • a fifth aspect of the embodiments of the present invention provides a device for resource allocation, including:
  • a resource allocation unit configured to determine, according to the number of data packets that need to be sent to the user equipment in the scheduling period, resources that carry the data packet from the schedulable time-frequency resources of the scheduling period, where the user equipment has a coverage level
  • the resource corresponds to the coverage level
  • a pilot sequence determining unit configured to determine, according to a coverage level corresponding to the resource, a pilot sequence carried by each resource unit RU that constitutes the resource;
  • the schedulable time-frequency resource of the scheduling period is composed of at least one RU, and the RU is composed of at least one resource element RE, where the RU includes one time slot in the time domain, and includes at least one in the frequency domain.
  • the RU includes an RE for carrying the pilot sequence and an RE for carrying the data packet, the RE being a time-frequency resource including one symbol in the time domain and one active subcarrier in the frequency domain.
  • the schedulable time-frequency resource of the scheduling period includes:
  • the remaining resources except the second resource are the remaining resources except the second resource;
  • the first resource is used to carry a physical broadcast channel PBCH
  • the second resource is used to carry a physical synchronization channel PSCH.
  • the resource allocation unit is configured to:
  • the remaining resources except the resources carrying the PDCCH in the schedulable time-frequency resources of the scheduling period are determined as resources for carrying the PDSCH.
  • the resource The allocation unit includes:
  • Determining a sub-unit configured to determine, according to the number of data packets corresponding to the coverage level, a number of code block resource units CBRUs corresponding to the coverage level, where the CBRUs include at least one time slot in the time domain, and are in frequency
  • the time domain resource of the at least one active subcarrier is included in the domain, and the CBRUs corresponding to different coverage levels are different;
  • a resource allocation sub-unit configured to determine, according to the number of CBRUs corresponding to the coverage level and a CBRU corresponding to the coverage level, resources that carry the data packet from the schedulable time-frequency resources of the scheduling period,
  • the resource consists of at least one CBRU corresponding to the coverage level.
  • the resource is composed of at least one CBRU corresponding to the coverage level, including:
  • the number of time slots included in the time domain of the CBRU corresponding to the coverage level is at least one; or
  • the number of the activated subcarriers included in the frequency domain of the CBRU corresponding to the coverage level is at least the same as the number of the activated subcarriers included in the frequency domain of the first resource.
  • the carrying The resource of the data packet is composed of at least one RU.
  • the CBRU corresponding to the coverage level is in the frequency domain
  • the number of activated subcarriers included is determined according to the number of activated subcarriers included in the frequency domain by the RU.
  • the location of the CBRU corresponding to the coverage level in the schedulable time-frequency resource of the scheduling period has a corresponding relationship with the device identifier of the user equipment.
  • the allocation unit is used to:
  • the one The slot includes 17 orthogonal frequency division multiplexed OFDM symbols.
  • the data The package includes:
  • the data packet is: a data packet carrying a physical downlink control channel PDCCH; and/or a data packet carrying a physical downlink shared channel PDSCH.
  • a sixth aspect of the embodiments of the present invention provides a device for resource allocation, including:
  • a memory for storing program code
  • a processor connected to the memory by a bus, for reading the program code, to perform: according to the number of data packets that need to be sent to the user equipment in a scheduling period, from the schedulable time-frequency resource of the scheduling period Determining a resource carrying the data packet, the user equipment has a coverage level, and the resource corresponds to the coverage level; and determining, according to the coverage level corresponding to the resource, each resource unit RU that constitutes the resource Pilot sequence
  • the schedulable time-frequency resource of the scheduling period is composed of at least one RU, and the RU is composed of at least one resource element RE, where the RU includes one time slot in the time domain, and includes at least one in the frequency domain.
  • a symbol is included above, and a time-frequency resource of an activated subcarrier is included in the frequency domain.
  • the schedulable time-frequency resource of the scheduling period includes:
  • the remaining resources except the second resource are the remaining resources except the second resource;
  • the first resource is used to carry a physical broadcast channel PBCH
  • the second resource is used to carry a physical synchronization channel PSCH.
  • the processor is used to:
  • the remaining resources are determined as resources for carrying the PDSCH.
  • the resource is composed of at least one CBRU corresponding to the coverage level, including:
  • the number of time slots included in the time domain of the CBRU corresponding to the coverage level is at least one; or
  • the number of the activated subcarriers included in the frequency domain of the CBRU corresponding to the coverage level is at least the same as the number of the activated subcarriers included in the frequency domain of the first resource.
  • the carrying The resource of the data packet is composed of at least one RU.
  • the CBRU corresponding to the coverage level is in the frequency domain.
  • the number of activated subcarriers included is determined according to the number of activated subcarriers included in the frequency domain by the RU.
  • the sixth possible implementation manner of the sixth aspect in a seventh possible implementation manner of the sixth aspect, corresponding to the coverage level
  • the location of the CBRU in the schedulable time-frequency resource of the scheduling period has a corresponding relationship with the device identifier of the user equipment.
  • the one The slot includes 17 orthogonal frequency division multiplexed OFDM symbols.
  • the data The package includes:
  • the data packet is: a data packet carrying a physical downlink control channel PDCCH; and/or a data packet carrying a physical downlink shared channel PDSCH.
  • a seventh aspect of the embodiments of the present invention provides an apparatus for indicating a resource type, including:
  • a determining unit configured to determine a pilot sequence that is carried by the resource unit RU, where the schedulable time-frequency resource of the scheduling period is composed of at least one of the RUs, where the pilot sequence is used to indicate the type of the schedulable periodic time-frequency resource,
  • the schedulable periodic time-frequency resource type includes a third resource and a fourth resource, where the third resource is used to carry a physical downlink control channel PDCCH, and the fourth resource is used to carry a physical downlink shared channel PDSCH;
  • a sending unit configured to send the pilot sequence to the user equipment.
  • the RU is a time-frequency resource including one time slot in the time domain and at least one active sub-carrier in the frequency domain, the time slot includes at least one symbol, and the RU includes at least one resource element RE.
  • the 15 REs form a group of time-frequency resource groups for carrying a pilot sequence
  • One of the pilot sequences is carried in the RU, and the one pilot sequence is carried by the set of time-frequency resource groups for carrying pilot sequences or by at least one group for carrying pilot sequences.
  • the frequency resource group bears jointly; or
  • At least one of the pilot sequences is carried in the RU, and each pilot sequence in the at least one pilot sequence is carried by a group of time-frequency resource groups for carrying pilot sequences or by at least one group Cooperating with a time-frequency resource group carrying a pilot sequence; or
  • the pilot sequence is jointly carried by at least one time-frequency resource group for carrying a pilot sequence in the RU, and each RU of the at least one RU includes at least one group of time-frequency resources for carrying a pilot sequence. group.
  • the pilot sequence indicator The types of time-frequency resources that can be scheduled, including:
  • the pilot sequence indicates a type of the schedulable periodic time-frequency resource
  • the pilot sequence indicates a size of the schedulable periodic time-frequency resource, and different types of schedulable time-frequency resources have different sizes.
  • the pilot sequence is a length a sequence that is an integer multiple of 15;
  • the sequence whose length is an integer multiple of 15 is generated by a ZC sequence, or
  • the sequence whose length is an integer multiple of 15 is generated by the m sequence, or
  • the sequence whose length is an integer multiple of 15 is generated by the Gold sequence.
  • An eighth aspect of the embodiments of the present invention provides an apparatus for indicating a resource type, including:
  • a memory for storing program code
  • a processor connected to the memory by a bus, for reading the program code, to perform: determining a pilot sequence carried by the resource unit RU, where the schedulable time-frequency resource of the scheduling period is composed of at least one of the RUs
  • the pilot sequence is used to indicate the type of the schedulable periodic time-frequency resource
  • the type of the schedulable periodic time-frequency resource includes a third resource and a fourth resource
  • the third resource is used to carry the physical downlink control channel.
  • a PDCCH where the fourth resource is used to carry a physical downlink shared channel PDSCH;
  • a transmitter connected to the processor by the bus, to perform: sending the pilot sequence to the user equipment.
  • the RU is a time-frequency resource that includes one time slot in the time domain, and includes at least one active sub-carrier in the frequency domain,
  • the slot includes at least one symbol, and the RU includes at least one resource element RE.
  • the 15 REs form a group of time-frequency resource groups for carrying the pilot sequence
  • One of the pilot sequences is carried in the RU, and the one pilot sequence is carried by the set of time-frequency resource groups for carrying pilot sequences or by at least one group for carrying pilot sequences.
  • the frequency resource group bears jointly; or
  • At least one of the pilot sequences is carried in the RU, and each pilot sequence in the at least one pilot sequence is carried by a group of time-frequency resource groups for carrying pilot sequences or by at least one group Cooperating with a time-frequency resource group carrying a pilot sequence; or
  • the pilot sequence is jointly carried by at least one time-frequency resource group for carrying a pilot sequence in the RU, and each RU of the at least one RU includes at least one group of time-frequency resources for carrying a pilot sequence. group.
  • the pilot sequence indicator The types of time-frequency resources that can be scheduled, including:
  • the pilot sequence indicates a type of the schedulable periodic time-frequency resource
  • the pilot sequence indicates a size of the schedulable periodic time-frequency resource, and different types of schedulable time-frequency resources have different sizes.
  • the pilot sequence is a length a sequence that is an integer multiple of 15;
  • the sequence whose length is an integer multiple of 15 is generated by a ZC sequence, or
  • the sequence whose length is an integer multiple of 15 is generated by the m sequence, or
  • the sequence whose length is an integer multiple of 15 is generated by the Gold sequence.
  • the ninth aspect of the embodiments of the present invention provides an apparatus for identifying a resource type, including:
  • a coverage level determining unit configured to determine a coverage level of the user equipment UE
  • an obtaining unit configured to obtain, according to the at least one pilot sequence stored by the UE, a pilot sequence of a schedulable resource bearer of a scheduling period;
  • a resource determining unit configured to determine, according to the type of the schedulable periodic time-frequency resource indicated by the pilot sequence, a resource corresponding to the coverage level.
  • the obtaining unit is configured to:
  • a tenth aspect of the embodiments of the present invention provides an apparatus for identifying a resource type, including:
  • a memory for storing program code
  • a processor connected to the memory by a bus, for reading the program code, to perform: determining a coverage level of the UE; obtaining, according to the at least one pilot sequence stored by the UE, a schedulable resource bearer of a scheduling period a pilot sequence; determining, according to the type of the schedulable periodic time-frequency resource indicated by the pilot sequence, a resource corresponding to the coverage level.
  • the processor is configured to:
  • An eleventh embodiment of the present invention provides an apparatus for receiving a data packet, including:
  • a coverage level determining unit configured to determine a coverage level of the user equipment UE
  • a resource determining unit configured to determine, according to the coverage level of the UE, a resource corresponding to the coverage level
  • a data packet receiving unit configured to receive, according to a predetermined code block resource unit CBRU location in the resource corresponding to the coverage level, a data packet of the UE, where a location of the predetermined CBRU corresponds to a device identifier of the UE.
  • a twelfth aspect of the embodiments of the present invention provides an apparatus for receiving a data packet, including:
  • a memory for storing program code
  • a processor coupled to the memory via a bus for reading the program code to perform:
  • Determining a coverage level of the user equipment UE Determining a coverage level of the user equipment UE; determining, according to the coverage level of the UE, a resource corresponding to the coverage level;
  • a receiver coupled to the processor via the bus to perform:
  • the time-frequency resources of the scheduling period are allocated, and the time-frequency resources are not fixedly divided into several parts, thereby reducing resource waste and realizing
  • the flexible allocation of time-frequency resources improves the utilization of time-frequency resources.
  • the resource allocation method provided by the embodiment of the present invention is based on a time-frequency resource of a scheduling period, that is, each resource allocation is performed for a time-frequency resource of a scheduling period.
  • the scheduling period is The duration of two subframes, that is, 320ms.
  • the user equipment can know the resource allocation in a timely manner, and the base station can notify the user equipment of the resource allocation by using the broadcast message in the prior art.
  • the broadcast message takes 1.28 s (that is, 1280 ms), which is an embodiment of the present invention.
  • the resource allocation method provided is more dynamic than the prior art, and it is avoided that a user equipment of a certain coverage level cannot allocate resources for a long time and cannot communicate with the base station.
  • 1 is a schematic diagram of allocating a time-frequency resource corresponding to one frame in the prior art
  • FIG. 2 is a schematic diagram of allocating a time-frequency resource corresponding to one frame in a case where a UE has four coverage levels in the prior art
  • FIG. 3 is a first schematic diagram of a time-frequency resource group for carrying a pilot sequence in an RU according to an embodiment of the present invention
  • FIG. 4 is a second schematic diagram of a time-frequency resource group for carrying a pilot sequence in an RU according to an embodiment of the present invention
  • FIG. 5 is a third schematic diagram of a time-frequency resource group for carrying a pilot sequence in an RU according to an embodiment of the present invention
  • FIG. 6 is a frequency reuse factor according to an embodiment of the present invention. And adopting a schematic diagram of resource division manner under configuration 1 in Table 2;
  • FIG. 7 is a frequency reuse factor according to an embodiment of the present invention. And another schematic diagram of the resource division manner under configuration 1 in Table 2 is adopted;
  • FIG. 8 is a frequency reuse factor according to an embodiment of the present invention. And a schematic diagram of resource partitioning in configuration 2 in Table 2;
  • FIG. 9 is a schematic diagram of a resource division manner under the configuration 1 in Table 2 in the embodiment of the present invention.
  • FIG. 10 is another schematic diagram of a resource division manner under the configuration 1 in Table 2 in the embodiment of the present invention.
  • FIG. 11 is a schematic diagram of a resource division manner in which the frequency reuse factor is 1 and the configuration 2 in Table 2 is used in the embodiment of the present invention
  • FIG. 12 is a schematic diagram of a base station transmitting a 2-fold repeated PDCCH code block according to an embodiment of the present invention.
  • FIG. 13 is a schematic diagram of a base station transmitting a 4-fold repeated PDCCH code block according to an embodiment of the present invention
  • FIG. 14 is a fourth schematic diagram of a time-frequency resource group for carrying a pilot sequence in an RU according to an embodiment of the present invention.
  • 15 is a fifth schematic diagram of a time-frequency resource group for carrying a pilot sequence in an RU according to an embodiment of the present invention.
  • 16 is a sixth schematic diagram of a time-frequency resource group for carrying a pilot sequence in an RU according to an embodiment of the present invention.
  • FIG. 17 is a seventh schematic diagram of a time-frequency resource group for carrying a pilot sequence in an RU according to an embodiment of the present invention.
  • FIG. 18 is a schematic diagram of an eighth type of time-frequency resource group for carrying a pilot sequence in an RU according to an embodiment of the present invention.
  • FIG. 19 is a ninth schematic diagram of a time-frequency resource group for carrying a pilot sequence in an RU according to an embodiment of the present invention.
  • 20 is a tenth schematic diagram of a time-frequency resource group for carrying a pilot sequence in an RU according to an embodiment of the present invention
  • FIG. 21 is a flowchart of a resource allocation method according to an embodiment of the present invention.
  • FIG. 22 is a flowchart of a method for indicating a resource type by a BS according to an embodiment of the present invention
  • FIG. 23 is a flowchart of a method for a UE to identify a type of a schedulable time-frequency resource in a scheduling period according to an embodiment of the present invention
  • FIG. 24 is a flowchart of a method for receiving a data packet according to an embodiment of the present invention.
  • FIG. 25 is a schematic block diagram of an apparatus for resource allocation according to an embodiment of the present disclosure.
  • FIG. 26 is a schematic structural diagram of an apparatus for resource allocation according to an embodiment of the present invention.
  • FIG. 27 is a schematic block diagram of an apparatus for indicating a resource type according to an embodiment of the present invention.
  • FIG. 28 is a schematic structural diagram of an apparatus for indicating a resource type according to an embodiment of the present disclosure.
  • FIG. 29 is a schematic block diagram of an apparatus for identifying a resource type according to an embodiment of the present disclosure.
  • FIG. 30 is a schematic structural diagram of an apparatus for identifying a resource type according to an embodiment of the present disclosure.
  • FIG. 31 is a schematic block diagram of an apparatus for receiving a data packet according to an embodiment of the present invention.
  • FIG. 32 is a schematic structural diagram of an apparatus for receiving a data packet according to an embodiment of the present invention.
  • the embodiments of the present invention are applicable to an Internet of Things communication system.
  • the Internet of Things communication system includes: a base station and a plurality of user equipments.
  • system and “network” in the embodiments of the present invention may be used interchangeably.
  • Multiple means two or more.
  • the character "/”, unless otherwise specified, generally indicates that the contextual object is an "or" relationship.
  • BS Base Station; English: Base Station
  • BTS Base Transceiver Station
  • CDMA Code Division Multiple Access
  • WCDMA NB NodeB; base station
  • eNB Evolutional Node B
  • LTE Long Term Evolution
  • 5G network 5G network
  • the UE may be a wireless terminal or a wired terminal.
  • the wireless terminal may be a device that provides voice and/or data connectivity to the user, a handheld device with wireless connectivity, or Other processing devices connected to the wireless modem, or wireless sensors with wireless connectivity.
  • the wireless terminal can communicate with one or more core networks via a radio access network (eg, Radio Access Network, RAN), which can be a mobile terminal, such as a mobile phone (or "cellular" phone), wireless wearable Devices, wireless meter reading devices, wireless sensors, and computers with mobile terminals, for example, may be portable, pocket, handheld, computer built-in or in-vehicle mobile devices that exchange language and/or data with a wireless access network .
  • RAN Radio Access Network
  • a wireless terminal may also be called a system, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, an AP, an access point, an access point. ), Remote Terminal, Access Terminal, User Terminal, User Agent, Terminal, or User Device.
  • the UEs in the cell are divided into different CCs according to the path loss (Chinese: Coverage Level; English: Coverage Class). For example, the UE can be divided into four coverage levels, the UE with a small path loss is divided into coverage level 1; the slightly worse is divided into coverage level 2; and the worst is divided into coverage level 4.
  • different modulation and coding modes are adopted according to the coverage level of the UE. For UEs with large path loss, a lower modulation and coding scheme is adopted to ensure the reliability of transmission; and for road loss is small The UE adopts a higher modulation and coding mode to improve the transmission efficiency.
  • the coverage level is 4 as an example. If the number of coverage levels changes, it is also within the protection scope of the present invention.
  • Table 1 is a list of parameter information for four coverage levels.
  • the number of times of repeated coding refers to the number of times that one PDCCH is repeatedly transmitted.
  • PDCCH refers to data representing control information.
  • PSCH Physical Synchronization Channel
  • PBCH Physical Broadcast Channel
  • PDCCH Physical downlink control channel
  • PDSCH Physical Downlink Control Channel
  • PSCH Physical Downlink Control Channel
  • PBCH Physical Broadcast Channel
  • PDSCH Physical Downlink Control Channel
  • shared information In this paper, PSCH refers to data representing synchronization information, and PBCH refers to data representing broadcast information.
  • PDSCH refers to data representing shared information.
  • FIG. 1 is a schematic diagram of assigning a time-frequency resource corresponding to one frame in the prior art.
  • a frame is divided into 8 subframes.
  • Each subframe includes 32 slots in time and 45 active subcarriers in the frequency domain.
  • the time-frequency resource corresponding to the last slot of each subframe is allocated to the PSCH.
  • Five consecutive time slots of every even subframe and 15 consecutive active subcarriers corresponding to the five consecutive time slots are allocated to the PBCH.
  • the live subcarrier is allocated to the PDCCH.
  • the remaining time-frequency resources allocated to the PSCH and PBCH and the PDCCH in one frame are allocated to the PDSCH.
  • the partially activated subcarrier is taken as an example of 8 active subcarriers.
  • a UE needs to receive the service of the BS, it first needs to synchronize with the BS, which is implemented by receiving the PSCH. Second, the UE needs to receive the PBCH, and the PBCH carries the system message. By receiving the system message, the UE can obtain the basic configuration information of the network, for example, the system bandwidth, the current frame number, and the like. Secondly, the UE needs to receive the PDCCH, and then obtain scheduling information, feedback information, and the like. Finally, the UE needs to receive the PDSCH to obtain downlink data.
  • the UE in order to receive the PDCCH, the UE first needs to know the location of the resource for carrying the PDCCH corresponding to the coverage level to which the UE belongs, and then find the PDCCH that the BS sends to itself.
  • FIG. 2 is a schematic diagram of a time-frequency resource allocated for one frame in the case where the UE has four coverage levels in the prior art.
  • the base station and the UE stipulate a plurality of time-frequency resource allocation modes, and the base station notifies the UE through a broadcast message, which type of time-frequency resource allocation mode is adopted, and the UE obtains four coverage levels and each according to a predefined division rule. Information about where the time-frequency resources corresponding to the coverage levels are located.
  • the resources for carrying the PDCCH corresponding to different coverage levels are fixed for a period of time.
  • each UE knows in advance the location of the resource for carrying the PDCCH corresponding to each coverage level, so the UE can find the location of the resource for carrying the PDCCH that is the same as the coverage level of the UE, and then check the PDCCH at the location. .
  • An RU is a time-frequency resource that includes one slot in the time domain and at least one active subcarrier in the frequency domain.
  • one RU includes one subband in the frequency domain, and one subband consists of 15 consecutive Activate the subcarrier composition. For 45 active subcarriers, it can be divided into 3 subbands.
  • one time slot is composed of at least one symbol.
  • one time slot includes 17 OFDM (Chinese: Orthogonal Frequency Division Multiplexing) symbols, so the embodiment of the present invention also proposes RE (Chinese: Resource Element; English: Resource Rlement) Used to identify time-frequency resources.
  • An RE is a time-frequency resource that includes one symbol in the time domain and an active subcarrier in the frequency domain.
  • An RU consists of at least one RE. If one RU includes 15 consecutive active subcarriers in the frequency domain, one RU includes a total of 255 REs, where 255 is equal to 17 times 15.
  • an RU includes an RE for carrying the pilot sequence and an RE for carrying a data packet.
  • the data packet includes data other than PBCH and PSCH, or data other than PSCH. That is to say, the data in the data packet is data other than PBCH and PSCH.
  • the data in the data packet is a PDCCH and/or a PDSCH. That is, the data packet is: a data packet carrying a PDCCH; and/or a data packet carrying a PDSCH.
  • a data packet is formed by encoding, encapsulating, etc. the data. Therefore, the schedulable time-frequency resource of the scheduling period is used to carry a PDCCH and/or a PDSCH.
  • the pilot sequence may also be referred to as RS (Chinese: reference signal; English: Reference Signal or Pilot).
  • RS Reference Signal
  • 30 REs of one RU are used to carry pilot sequences, and the remaining 225 REs are used to carry data packets; or 45 REs of one RU are used to carry pilot sequences, and the remaining 210 REs are used to carry data packets.
  • the resource allocation method provided by the embodiment of the present invention is based on a time-frequency resource of a scheduling period, that is, each resource allocation is performed for a time-frequency resource of a scheduling period.
  • the scheduling period is the duration of two subframes, that is, 320 ms.
  • the user equipment can know the resource allocation in a timely manner, and the base station can notify the user equipment of the resource allocation by using the broadcast message in the prior art.
  • the broadcast message takes 1.28 s (that is, 1280 ms), which is an embodiment of the present invention.
  • the resource allocation method provided is more dynamic than the prior art, and it is avoided that a user equipment of a certain coverage level cannot allocate resources for a long time and cannot communicate with the base station.
  • a resource allocation method provided by an embodiment of the present invention includes the following steps:
  • Step 101 Determine, according to the number of data packets that need to be sent to the user equipment in the scheduling period, resources that carry the data packet from the schedulable time-frequency resources of the scheduling period, where the user equipment has an coverage level, The resource corresponds to the coverage level.
  • Step 102 Determine, according to the coverage level corresponding to the resource, a pilot sequence carried by each resource unit RU that constitutes the resource.
  • the schedulable time-frequency resource of the scheduling period is composed of at least one RU.
  • the schedulable time-frequency resource of the scheduling period includes:
  • the remaining resources except the second resource are the remaining resources except the second resource;
  • the first resource is used to carry a physical broadcast channel PBCH
  • the second resource is used to carry a physical synchronization channel PSCH.
  • the schedulable time-frequency resources of the scheduling period are: all the time-frequency resources of the scheduling period, except for the resources carrying the PSCH. Remaining resources. If the resources carrying the PBCH and the resources carrying the PSCH are unschedulable in all the time-frequency resources of the scheduling period, the schedulable time-frequency resources of the scheduling period refer to all the time-frequency resources of the scheduling period, except for the resources carrying the PBCH. And the remaining resources outside the resources carrying the PSCH. All time-frequency resources of the scheduling period are all available frequencies of the scheduling node in the frequency domain, for example, all available active sub-carriers, and one scheduling period in time.
  • the frequency domain includes 45 active subcarriers; if the frequency reuse factor is Then, 15 active subcarriers are included in the frequency domain.
  • a scheduling period is 2 subframes, a total of 320ms.
  • the resource carrying the PSCH in the scheduling period is unschedulable, then The resources carrying the PSCH are determined in all the time-frequency resources of the scheduling period, and the remaining resources of the time-frequency resources of the scheduling period except the resources carrying the PSCH are used as the schedulable resources of the scheduling period.
  • the resource carrying the PSCH and the resource carrying the PBCH are unschedulable, the resource carrying the PSCH and the resource carrying the PBCH are determined from all the time-frequency resources of the scheduling period, and then the scheduling period is All the time-frequency resources except the resources carrying the PSCH and the resources carrying the PBCH are used as the schedulable resources of the scheduling period.
  • the resource carrying the PBCH and the resource carrying the PSCH are preset.
  • a preset rule is: similar to the prior art, assigning the last slot of each subframe and the 45 consecutive activated subcarriers corresponding to the last slot to the PSCH.
  • the consecutive 5 slots of each even subframe and the 15 consecutive activated subcarriers corresponding to the consecutive 5 slots are allocated to the PBCH.
  • the specific 5 time slots are allocated to the PBCH, and may be determined according to the cell identity of the cell where the user equipment UE scheduled in the scheduling period is located.
  • the resource carrying the PDCCH is corresponding to the coverage level. If the resource used to carry the PDSCH needs to be corresponding to the coverage level, the description of the resource corresponding to the coverage of the PDCCH and the coverage level may be referred to. The following is an example in which the resource carrying the PDCCH is corresponding to the coverage level, and the resource for carrying the PDSCH does not need to correspond to the coverage level.
  • each of the multiple RUs of the schedulable time-frequency resource that constitutes the scheduling period has the following first implementation manner and the second implementation manner:
  • each of the plurality of RUs of the schedulable time-frequency resource that constitutes the scheduling period includes only one of a resource for carrying the PDSCH and a resource for carrying the PDCCH corresponding to one coverage level.
  • the resources for carrying the PDCCH corresponding to the coverage level which are composed of at least one RU, are determined from the plurality of RUs of the schedulable time-frequency resources that constitute the scheduling period, and then the remaining RUs are used.
  • the coverage level refers to an coverage level that the user equipment that needs to be scheduled in the scheduling period has.
  • each of the multiple RUs of the schedulable time-frequency resource that constitutes the scheduling period includes both the resource for carrying the PDSCH and the one for the coverage level.
  • the resource of the PDCCH includes both the resource for carrying the PDSCH and the one for the coverage level.
  • the resource of the PDCCH includes both the resource for carrying the PDSCH and the one for the coverage level.
  • the resource of the PDCCH includes both the resource for carrying the PDSCH and the one for the coverage level.
  • the resource of the PDCCH a part of the 15 consecutive activated sub-carriers of each RU activates the sub-carrier as the resource corresponding to one coverage level for carrying the PDCCH, and the remaining activated sub-carriers As a resource for carrying the PDSCH.
  • each of the RUs includes resources for carrying the PDCCH corresponding to multiple different coverage levels.
  • a part of the 15 consecutive activated sub-carriers of each RU activates the sub-carrier as the resource corresponding to one coverage level for carrying the PDCCH, and the remaining activated sub-carriers As a resource for carrying a PDCCH corresponding to another coverage level.
  • each of the RUs includes a resource for carrying a PDSCH and a resource for carrying a PDCCH corresponding to multiple different coverage levels.
  • a part of the 15 consecutive activated sub-carriers of each RU activates the sub-carriers as resources corresponding to one coverage level for carrying the PDCCH, and a part of the activated sub-carriers
  • a resource for carrying a PDCCH corresponding to another coverage level, and the remaining activated subcarriers serve as resources for carrying the PDSCH.
  • subcarriers in the RU are used as the resources for carrying the PDSCH
  • which subcarriers are used as the resources for carrying the PDCCH corresponding to which coverage level may be preset or semi-statically set, that is, which of the RUs is set by the base station
  • the subcarriers serve as resources for carrying the PDSCH, which subcarriers serve as resources for carrying the PDCCH corresponding to which coverage level, and notify the UE by a broadcast message.
  • each RU will specify a high priority, for example, specifying that the PDCCH is a high priority.
  • a high priority for example, specifying that the PDCCH is a high priority.
  • it may be pre-agreed or semi-statically set, that is, the base station sets which of the RUs is a high priority and notifies the UE scheduled in the scheduling period by a broadcast message.
  • which sub-carriers in the RU are used as the resources for carrying the PDCCH corresponding to the coverage level, and which sub-carriers are used as the resources for carrying the PDSCH, and the RUs are classified into different types.
  • the UE scheduled in the scheduling period is notified by a broadcast message.
  • multiple RUs of the schedulable time-frequency resources that make up the scheduling period may A part of the RU is used in the first implementation manner, and the other part is used in the second embodiment.
  • the RUs for carrying the PDCCH constitute a PDCCH region
  • the RUs for carrying the PDSCH constitute a PDSCH region.
  • the PDCCH region and the PDSCH region may be composed of one or more RUs that are physically consecutive, or may be composed of physically non-contiguous RUs. If it is the latter, the virtual continuous RU is defined, and the virtual RU and the physical RU are mapped according to a predefined rule. At this time, the PDCCH area and the PDSCH area are consecutively one or more from the perspective of the virtual RU.
  • the composition of the RU is
  • a predefined rule between a virtual RU and a physical RU is:
  • N_sv(i) represents a virtual RU number
  • N_sp(i) represents a physical RU number
  • the PDCCH region may be classified into one or more types of different regions according to the number of coverage levels of the UEs scheduled by the scheduling period, for example, a PDCCH region with a coverage level of 1, a PDCCH region with a coverage level of 2, and the like.
  • each of the plurality of RUs of the schedulable time-frequency resource that constitutes the scheduling period belongs to only one PDCCH region of the coverage level, or only belongs to the PDSCH region.
  • each of the plurality of RUs that are schedulable time-frequency resources according to the scheduling period includes the resources for carrying the PDCCH and the resources for carrying the PDSCH are similar, according to whether each RU in the PDCCH region includes and different coverage levels.
  • the PDCCH region has a third implementation manner and a fourth implementation manner, which are corresponding to the resources for carrying the PDCCH.
  • each RU in the PDCCH region includes only resources corresponding to one coverage level for carrying the PDCCH, that is, 15 initiators in the PDCCH region where no RU exists.
  • the carrier part activates the subcarrier as a resource for carrying the PDCCH corresponding to one coverage level, and the remaining activated subcarrier serves as a resource for carrying the PDCCH corresponding to another coverage level. That is, the resource carrying the data packet is composed of at least one RU.
  • each RU in the PDCCH region includes resources for carrying a PDCCH corresponding to different coverage levels.
  • the 15 activated subcarrier portions of each RU in the PDCCH region activate the subcarriers as resources for carrying the PDCCH corresponding to one coverage level, and the remaining activated subcarriers serve as resources for carrying the PDCCH corresponding to another coverage level.
  • which sub-carriers in the RU are used as the bearer PDCCH resources which may be preset or semi-statically set, that is, the base station sets which sub-carriers in the RU are used as bearers corresponding to which coverage level.
  • the resources of the PDCCH are notified by the broadcast message to the UE scheduled in the scheduling period.
  • each RU defines a high priority coverage level, for example, the coverage level 1 is a high priority.
  • the coverage level is high priority, it may be pre-agreed or semi-statically set, that is, the base station sets which coverage level in the RU is high priority and notifies the UE scheduled in the scheduling period by a broadcast message.
  • each RU is defined as one type, and the number of subcarriers for carrying the PDSCH included in each of the RUs, and the subcarriers for carrying the PDCCH corresponding to the various coverage levels. The number of carriers, which is notified by the base station to the UE scheduled in the scheduling period by a broadcast message.
  • a part of the RUs in the PDCCH area may use the foregoing third implementation manner, and another part of the RU uses the foregoing fourth implementation manner, which is not limited in the embodiment of the present invention.
  • Each of the RUs of the schedulable time-frequency resources constituting the scheduling period includes only one of a resource for carrying a PDCCH and a resource for carrying a PDSCH, and each RU in the PDCCH region includes a corresponding one of the coverage levels.
  • the resource carrying the PDCCH how to perform step 101 is described in detail.
  • the embodiment of the present invention provides a CBRU (Chinese: Coded Block Resource Unit).
  • the CBRU is a time-frequency resource including at least one time slot in the time domain and at least one active sub-carrier in the frequency domain.
  • a CBRU is used to carry a packet.
  • CBRU at the time The number of time slots included in the domain and the number of activated subcarriers included in the frequency domain may be predefined, and the CBRUs corresponding to different coverage levels are different.
  • the number of activated subcarriers included in the frequency domain by the CBRU corresponding to the coverage level is determined according to the number of activated subcarriers included in the frequency domain by the RU. That is, the number of activated subcarriers included in the CBRU may be predefined according to the RU. If one RU includes 15 consecutive activated subcarriers, the number of activated subcarriers included in the CBRU may be defined as 3 or 5 or 15. Multiples. Of course, the number of activated subcarriers included in the CBRU may not be predefined according to the RU, but may be configured with reference to the prior art.
  • Table 1 shows an example in which the number of coverage levels is 4.
  • the last row in Table 1 lists the CBRUs corresponding to each coverage level.
  • the CBRU corresponding to the coverage level 1 includes 4 activations.
  • the CBRU corresponding to the coverage level 2 includes 4 active subcarriers
  • the CBRU corresponding to the coverage level 3 includes 4 active subcarriers
  • the CBRU of the coverage level 4 includes 4 active subcarriers.
  • Table 2 lists two configurations of the number of active subcarriers included in the frequency domain of CBRUs corresponding to different coverage levels.
  • the number of activated subcarriers included in the CBRU is determined according to the number of activated subcarriers included in the RU.
  • the number of activated subcarriers included in the CBRU is 3 or a multiple of 5 or 15.
  • the number of activated subcarriers included in the CBRU is configured with reference to the prior art, and the total number of time-frequency REs corresponding to each coverage level of the prior art is equal.
  • the resources for carrying the PDCCH are first determined from the plurality of RUs of the schedulable time-frequency resources that make up the scheduling period, and then the remaining resources are used as resources for carrying the PDSCH.
  • First, how to determine the resources used to carry the PDCCH will be described. Includes the following steps:
  • the base station determines, according to the number of data packets carrying the PDCCH corresponding to the coverage level of the user equipment that needs to be scheduled in the scheduling period, the size of the resource used to carry the PDCCH in the scheduling period, and further The resource for carrying the PDCCH corresponding to each coverage level is determined, and the resource is allocated to the data packet carrying the PDCCH in the scheduling period, and the remaining resources that are not allocated in the scheduling period are the resources used to carry the PDSCH.
  • the resource carrying the data packet is determined in the schedulable time-frequency resource, and the resource corresponding to the lowest coverage level is located at a starting position of the schedulable time-frequency resource in the scheduling period.
  • a resource allocation manner is: the base station sequentially determines the size and number of corresponding CBRUs of each coverage level according to the order of the coverage level of the user equipment that needs to be scheduled in the scheduling period from high to low.
  • the size of the CBRU corresponding to each coverage level refers to the number of slots included in the time domain of the CBRU corresponding to each coverage level and the number of activated subcarriers included in the frequency domain.
  • the number of CBRUs corresponding to each coverage level refers to how many CBRUs corresponding to the coverage level can be divided according to the size of the CBRU corresponding to the coverage level.
  • the time domain is incremented by the time slot, and the frequency is activated from the lowest frequency.
  • the subcarrier or the highest frequency activated subcarrier is counted, and the active subcarrier is incremented in the frequency domain.
  • the active subcarrier of one slot is allocated, and after the active subcarrier of one slot is allocated, the next next one is allocated.
  • the activated subcarriers of the slot are allocated until the number of CBRUs corresponding to the highest coverage level that the user equipment that needs to be scheduled in the scheduling period has been allocated.
  • the number of CBRUs corresponding to the next highest coverage level of the user equipment that needs to be scheduled in the scheduling period is allocated in the same manner.
  • the number of CBRUs corresponding to all coverage levels that the user equipment that needs to be scheduled needs to be allocated after the scheduling period is allocated.
  • the remaining unallocated resources are resources for carrying the PDSCH.
  • the number of time slots included in the time domain of the CBRU corresponding to the coverage level is at least one; or
  • the number of the activated subcarriers included in the frequency domain of the CBRU corresponding to the coverage level is at least the same as the number of the activated subcarriers included in the frequency domain of the first resource.
  • the time slot is divided into time slots, and the time-frequency resources of the previous time slot are divided to divide the time-frequency resources of the next adjacent time slot.
  • Frequency reuse factor For example, in this case, one cell occupies one sub-band, taking the second sub-band (sub-band 1) occupied by the cell as an example.
  • the number of active sub-carriers included in the CBRU is as shown in Table 2, and the base station determines each coverage level.
  • the number of corresponding CBRUs is shown in Table 3.
  • a resource partitioning mode is shown in Figure 6.
  • the PDCCH region will cross the odd subframes to the even subframes. At this time, the allocation of the PDCCH region skips the RU for carrying the PSCH and the RU for carrying the PBCH.
  • Frequency reuse factor For example, in this case, one cell occupies one sub-band, taking the second sub-band (sub-band 1) occupied by the cell as an example.
  • the number of active sub-carriers included in the CBRU is as shown in Table 2, and the base station determines each coverage level.
  • the number of corresponding CBRUs is shown in Table 4.
  • a resource partitioning mode is shown in Figure 7.
  • Frequency reuse factor For example, in the same way, one cell occupies one sub-band, taking the second sub-band (sub-band 1) occupied by the cell as an example.
  • the number of activated sub-carriers included in the CBRU is as shown in Table 2, and the base station determines each coverage level.
  • the number of corresponding CBRUs is shown in Table 5.
  • a resource partitioning mode is shown in Figure 8.
  • the above frequency reuse factor is In the case of a BS, it is usually divided into 3 sectors. Each sector uses a different active subcarrier, for example: sector 1 uses active subcarriers 0-14, sector 2 uses active subcarriers 15-29, and sector 3 uses active subcarriers 30-44. Such mutual interference between sectors will be greatly reduced. But the corresponding disadvantage is that the resources available to each sector will be reduced.
  • the time slot is divided into time slots, and the time-frequency resources having the same activated subcarrier number as the resources used to carry the PBCH are divided, and then the resources for carrying the PBCH are divided. Time-frequency resources with different subcarrier numbers.
  • the frequency reuse factor as an example, one cell occupies three sub-bands at the same time.
  • the number of active sub-carriers included in the CBRU is as shown in Table 2, and the number of CBRUs that each base station determines for each coverage level is shown in Table 6.
  • a resource partitioning method is shown in Figure 9.
  • the PDCCH region is allocated in the following manner: the time-frequency domain resource of the sub-band in which the RU that carries the PBCH is preferentially allocated to the PDCCH, and the sub-band in which the RU for carrying the PBCH is located When the time-frequency domain resources are insufficient, the time-frequency resources of other sub-bands are allocated to the PDCCH. Advantages: Interference coordination between cells can be done.
  • the number of subcarriers is the configuration 1 in Table 2.
  • the base station determines the number of CBRUs corresponding to each coverage level as shown in Table 7.
  • a resource partitioning manner that can perform interference coordination between cells is shown in FIG.
  • the frequency reuse factor as an example, one cell occupies three sub-bands at the same time.
  • the number of active sub-carriers included in the CBRU is as shown in Table 2 in Table 2.
  • the number of CBRUs that each base station determines for each coverage level is shown in Table 8.
  • a resource partitioning method is shown in Figure 11.
  • FIG. 6, FIG. 7, FIG. 9, and FIG. 10 are obtained on the premise that the number of activated subcarriers included in the CBRU is the configuration 1 in Table 2, one RU can be equally divided by multiple CBRUs, and there is no PDCCH region. The case where each RU corresponds to a different coverage level. As can be seen from FIG. 6, FIG. 7, FIG. 9, and FIG. 10, each RU in the PDCCH region corresponds to one coverage level.
  • FIG. 8 and FIG. 11 are obtained on the premise that the number of activated subcarriers included in the CBRU is the configuration 2 in Table 2, one RU cannot be equally divided into multiple CBRUs, if it is desired to ensure each RU in the PDCCH region. Corresponding to a coverage level, there may be unallocated time-frequency resources in the RU. As shown in FIG. 8, the 29th active subcarrier corresponding to slot 2 in the frame with the odd subframe number is an idle resource and is not utilized. Similarly, it can be seen from FIG. 8 that the activated subcarriers No. 24 to No. 29 corresponding to the slot 8 in the subframe with the odd subframe number are idle resources, and the slot 12 in the subframe with the odd subframe number is odd.
  • the number to the 29th activated subcarrier is an idle resource.
  • the 28th to 29th activated subcarriers corresponding to the slot 1 in the subframe with the odd frame number are idle resources, and the 21st subframe corresponding to the slot 5 in the frame with the odd subframe number is The activated subcarrier No. 29 is an idle resource, and the activated subcarriers No. 23 to No. 29 corresponding to the slot 8 in the frame with an odd subframe number are idle resources.
  • the number of activated subcarriers included in the CBRU is the configuration 2 in Table 2
  • the CBRU corresponding to one coverage level After the number is sufficient, the allocation of the CBRU corresponding to the next coverage level must be performed starting from the next unassigned neighboring RU.
  • the number of activated subcarriers included in the CBRU is the configuration 2 in Table 2, if it is desired to ensure that each RU in the PDCCH region corresponds to one coverage level, then after the number of CBRUs corresponding to one coverage level is sufficient, A certain amount of idle resources is required, and the allocation of the CBRU corresponding to the next coverage level needs to be started from the next RU. As shown in FIG. 11, a part of the three RUs corresponding to the time slot 5 in the frame with an odd subframe number corresponds to the coverage level 2, and a part of the RU corresponds to the coverage level 3. There is a period of idle between the coverage level 2 and the coverage level 3.
  • a part of the three RUs corresponding to the time slot 8 in the frame with an odd subframe number corresponds to the coverage level 3, and a part of the RU corresponds to the coverage level 4.
  • step 102 is executed to determine a pilot sequence carried by each resource unit RU constituting the resource according to the coverage level corresponding to the resource.
  • the REs used to carry the pilot sequence in the RU may be used to carry different pilot sequences, and the pilot sequence is used to indicate the bearer PDCCH corresponding to each coverage level.
  • the method for the BS to indicate the type of schedulable time-frequency resource of the scheduling period.
  • the foregoing is the entire process of the resource allocation method provided by the embodiment of the present invention.
  • the resource allocation method provided by the embodiment of the present invention implements a flexible allocation of a resource for carrying a PDCCH and a resource for carrying a PDSCH, and improves a resource for a fixed partition for carrying a PDCCH and a resource for carrying a PDSCH in the prior art.
  • the allocation method also changes the resource allocation method in the prior art that the resource for carrying the PDCCH is fixedly divided into portions corresponding to the coverage level.
  • the UE in order to receive the PDCCH, the UE first needs to know the location of the resource for carrying the PDCCH corresponding to the coverage level to which the UE belongs, and then find the PDCCH sent by the BS to the UE from the location. .
  • the embodiment of the present invention provides a method for facilitating the UE to know the location of the resource for carrying the PDCCH corresponding to the coverage level to which the UE belongs. The method for indicating the type of schedulable time-frequency resource of the scheduling period by the BS, and the method for identifying the type of the schedulable time-frequency resource for the UE to identify the scheduling period.
  • Step 201 Determine a pilot sequence that is carried by the resource unit RU, where the schedulable time-frequency resource of the scheduling period is composed of at least one of the RUs, where the pilot sequence is used to indicate the type of the schedulable periodic time-frequency resource,
  • the schedulable periodic time-frequency resource type includes a third resource and a fourth resource, where the third resource corresponds to a coverage level that the user equipment has, and the fourth resource is used to carry the physical downlink shared channel PDSCH.
  • Step 202 Send the pilot sequence to the user equipment.
  • the concepts of the RU, the time slot, and the RE are the same as those in the foregoing, and are not described herein again.
  • 15 REs form a group of time-frequency resource groups for carrying pilot sequences
  • One of the pilot sequences is carried in the RU, and the one pilot sequence is carried by the set of time-frequency resource groups for carrying pilot sequences or by at least one group for carrying pilot sequences.
  • the frequency resource group bears jointly; or
  • At least one of the pilot sequences is carried in the RU, and each pilot sequence in the at least one pilot sequence is carried by a group of time-frequency resource groups for carrying pilot sequences or by at least one group Cooperating with a time-frequency resource group carrying a pilot sequence; or
  • the pilot sequence is jointly carried by at least one time-frequency resource group for carrying a pilot sequence in the RU, and each RU of the at least one RU includes at least one group of time-frequency resources for carrying a pilot sequence. group.
  • 15 REs with the same symbol number or different symbol numbers form a group A time-frequency resource group used to carry pilot sequences.
  • FIG. 3 FIG. 4, FIG. 14 to FIG. 17, and FIG. 20, 15 REs having the same symbol number form a group of time-frequency resource groups for carrying pilot sequences.
  • FIG. 5 and FIG. 17 to FIG. 19 15 REs with different symbol numbers form a group of time-frequency resource groups for carrying pilot sequences.
  • one RU includes a first group of time-frequency resources for carrying pilot sequences and a second group of time-frequency resources for carrying pilot sequences, and two groups are used for carrying pilots.
  • the time-frequency resources of the sequence include 15 REs, and there are frequency intervals between two active sub-carriers corresponding to any two REs of the time-frequency resources used by the two groups for carrying the pilot sequence.
  • the partial RE of the symbol 2 and the partial RE of the symbol 6 are used as the first group of time-frequency resources for carrying the pilot sequence
  • the partial RE of the symbol 10 and the partial RE of the symbol 14 and the partial RE are used as the second group.
  • part RE of symbol 10 As the first group of time-frequency resources for carrying the pilot sequence, and part RE of symbol 6 and symbol 14
  • the partial RE acts as a second group of time-frequency resources for carrying the pilot sequence.
  • the first implementation manner is: the RU carries one of the pilot sequences, and the one pilot sequence is carried by the group of time-frequency resource groups used to carry the pilot sequence. . That is, there is a pilot sequence in an RU, and the pilot sequence is carried by a group of time-frequency resource groups for carrying pilot sequences.
  • a RU as shown in FIG. 19 carries a pilot sequence of length 15.
  • the pilot sequence of length 15 is carried in a group of time-frequency resource groups for carrying a pilot sequence as shown in FIG. .
  • the second implementation manner is: the RU carries one of the pilot sequences, and the one pilot sequence is jointly carried by at least one group of time-frequency resource groups for carrying pilot sequences. . That is, one RU carries a pilot sequence, and the pilot sequence is carried by multiple groups of time-frequency resource groups for carrying pilot sequences.
  • One RU as shown in FIG. 4 carries a pilot sequence of length 30, and the pilot sequence of length 30 is carried in the two groups of time-frequency resource groups for carrying the pilot sequence shown in FIG. 4.
  • the third implementation manner is: the RU carries at least one pilot sequence, and each pilot sequence in the at least one pilot sequence is used by a group to carry pilots.
  • the time-frequency resource group of the sequence is carried.
  • one RU carries two pilot sequences of length 15, and two pilot sequences of length 15 are respectively carried in a group of time-frequency resource groups for carrying pilot sequences as shown in FIG. .
  • the symbols 5 and 11 and the corresponding 15 consecutive activated subcarriers respectively carry the pilot sequence 1 and the pilot sequence 2, and the two pilot sequences are uniformly distributed in one RU.
  • symbols 4 and 12 and corresponding 15 consecutive activated subcarriers respectively carry pilot sequence 1 and pilot sequence 2, and the cooperative estimation between the RUs can be utilized to improve performance.
  • FIG. 17 symbols 4 and 12 and corresponding 15 consecutive activated subcarriers
  • Time-frequency resources jointly carrying pilot sequence 1, eight frequency-frequency activated subcarriers corresponding to symbol 10 and symbol 10, and seven frequency-interval activated subcarriers corresponding to symbol 6 and symbol 6 as a group
  • the time-frequency resources carrying the pilot sequences jointly carry the pilot sequence 2.
  • one RU carries three pilot sequences of length 15, and three pilot sequences of length 15 are respectively carried in a group of time-frequency resource groups for carrying pilot sequences as shown in FIG. .
  • symbols 3, 8, 13, and corresponding 15 consecutive activated subcarriers respectively carry pilot sequence 1, pilot sequence 2, and pilot sequence 3, where three pilot sequences are in one
  • the distribution within the RU is relatively uniform.
  • the symbols 4, 8, 12 and the corresponding 15 consecutive activated subcarriers respectively carry the pilot sequence 1, the pilot sequence 2 and the pilot sequence 3.
  • the symbols 3, 7, 12 and the corresponding 15 consecutive activated subcarriers respectively carry the pilot sequence 1, the pilot sequence 2 and the pilot sequence 3.
  • the symbols 2, 8, 14 and the corresponding 15 consecutive activated subcarriers respectively carry the pilot sequence 1, the pilot sequence 2 and the pilot sequence 3, and the correlation estimation between the RUs can be improved. performance.
  • the fourth implementation manner is: the RU carries at least one pilot sequence, and each pilot sequence in the at least one pilot sequence is used by at least one group.
  • the time-frequency resource groups of the frequency sequence are jointly carried. That is, one RU carries multiple pilot sequences, and each pilot sequence in multiple pilot sequences is carried in multiple groups of time-frequency resource groups for carrying pilot sequences.
  • one RU carries two pilot sequences of length 30, and two lengths are 30.
  • the pilot sequences are respectively carried in the two groups of time-frequency resource groups for carrying the pilot sequences shown in FIG.
  • the pilot sequence 1 carries a partial RE of symbol 2
  • a partial RE of symbol 6 carries a partial RE of symbol 10 and a partial RE of symbol 14.
  • a part of REs are used to carry data packets, and a part of REs are used to carry RSs.
  • the base station can first use the RE in the RU to carry the data packet. For example, if one RU is allocated to the PDCCH, a part of the REs in the RU carry the PDCCH data packet. For another example, if one RU is allocated to a PDCCH corresponding to one coverage level, a part of the REs in the RU carries a PDCCH data packet corresponding to the coverage level.
  • the location of each CBRU in the multiple CBRUs included in the PDCCH region corresponding to the coverage level may be pre-agreed, thereby reducing the UE search BS to send to the UE itself.
  • the number of searches for the PDCCH code block include:
  • the location of the CBRU corresponding to the coverage level in the schedulable time-frequency resource of the scheduling period has a corresponding relationship with the device identifier of the user equipment.
  • a pre-agreed rule includes the following steps:
  • Step 1 Each CBRU number of the plurality of CBRUs included in the PDCCH region of the coverage level.
  • Step 2 Determine whether there is a common PDCCH data packet. If there is a common PDCCH data packet, go to the third step. If there is no public PDCCH data packet, go to the fifth step.
  • the third step if there is a common PDCCH data packet, pre-arrange which CBRU that carries the PDCCH common data packet is. If there are multiple PDCCH common data packets, what are the CBRUs that pre-arranged to carry multiple PDCCH common data packets? One. For example, if there is one common PDCCH data packet, the first CBRU bearer PDCCH common data packet is pre-agreed. If there are three common data packets, the first three CBRUs may be pre-scheduled to carry three PDCCH common data packets.
  • the fourth step re-numbering the remaining CBRUs except the bearer of the common PDCCH data packet, and pre-arranging the dedicated PDCCH data packet carrying the UE according to the identifier of the UE. It is assumed that, except for the remaining C CRUs that carry the common PDCCH data packet, one or more CBRUs carrying the dedicated PDCCH data packets of the UE are pre-agreed according to the identifier of the UE.
  • the identity of the UE is C-RNTI (Cell Radio Network Temporary Identifier)
  • C-RNTI mod N Cell Radio Network Temporary Identifier
  • the remainder is taken, that is, the number of the CBRU carrying the dedicated PDCCH data packet of the UE is the remainder obtained by dividing the C-RNTI of the UE by N.
  • N/M group the group number of the CBRU carried by the M modules of the UE is (C-RNTI mod). (N/M)); the identity of the UE is not limited to the C-RNTI, and may be the group identity code Group_ID assigned by the BS to the UE or the device identifier of the UE after the BS groups the multiple UEs.
  • the BS can reduce the waste of PDCCH resources by the allocation of C-RNTI or Group_ID and reasonable scheduling. For example, the C-RNTI or Group_ID allocated by the BS for each coverage level UE is uniform.
  • Another pre-agreed rule is similar to the LTE PDCCH search space and will not be described here.
  • the number of repetition coding times of the PDCCH data packet corresponding to each coverage level is considered, for example, the number of repeated coding times of the PDCCH data packet corresponding to the four coverage levels shown in Table 1.
  • the following are: 1, 1, 2, and 2, taking the coverage level 3 as an example. If the repetition coding is required twice, the PDCCH data packet covering the level 3 is sent once in each scheduling period.
  • the embodiment of the present invention proposes that the start time of the first PDCCH data packet transmission with the number of times of coding is greater than or equal to 1 according to a predetermined rule, so that the BS repeatedly transmits the PDCCH data packet according to the convention, and the UE can determine the first PDCCH data according to a predetermined rule.
  • the start time of the packet transmission is not limited to 1 according to a predetermined rule.
  • the second PDCCH packet of the coverage level is periodically transmitted.
  • one scheduling period includes durations of two subframes
  • the first scheduling period includes a sum of durations of subframe 1 and subframe 2 of the ith frame
  • the second scheduling period includes subframe 3 and subframes of the ith frame.
  • the BS transmits the first PDCCH packet that is repeatedly encoded, that is, packet 1, in the slot of subframe 1 of the i-th frame.
  • the BS transmits the repeatedly encoded second PDCCH packet, i.e., packet 1', in the slot of subframe 3 of the i-th frame.
  • the same PDCCH packet is sent twice in one scheduling period.
  • the period required to transmit the two identical PDCCH packets that are repeatedly encoded is referred to as a 2-fold repetition coding period.
  • the fourth module of the class As shown in FIG. 13, one scheduling period includes durations of two subframes, the first scheduling period includes a sum of durations of subframe 1 and subframe 2 of the ith frame, and the second scheduling period includes subframe 3 and subframes of the ith frame. 4.
  • the third scheduling period includes subframe 5 and subframe 6 of the ith frame
  • the fourth scheduling period includes subframe 7 of the ith frame and subframe 0 of the i+1th frame.
  • the BS transmits the first PDCCH packet that is repeatedly encoded, that is, packet 1, in the slot of subframe 1 of the i-th frame.
  • the BS transmits the repeatedly encoded second PDCCH packet, i.e., packet 1', in the slot of subframe 3 of the i-th frame.
  • the BS transmits the repeatedly encoded third PDCCH packet, that is, the packet 1" in the slot of the subframe 5 of the i-th frame.
  • the BS transmits the repeated coding in the slot of the subframe 7 of the i-th frame.
  • Four PDCCH packets ie packet 1"'.
  • the same PDCCH packet is sent four times in one scheduling period.
  • the period required to transmit the four identical PDCCH packets repeatedly encoded is referred to as a 4-fold repetition
  • the data types that a RU may carry are: PDCCH and PDSCH, where the PDCCH corresponds to different coverage levels.
  • the embodiment of the present invention proposes that the BS uses the RE bearer RS in the RU to distinguish the type of data carried by the RU through the RS.
  • the RS is a pilot sequence with an integer multiple of 15.
  • the sequence whose length is an integral multiple of 15 is generated by a ZC sequence, or the sequence whose length is an integer multiple of 15 is generated by an m sequence, or the sequence whose length is an integer multiple of 15 is a Gold sequence. Generated.
  • the pilot sequence is:
  • N zc 15
  • u is the root of the ZC sequence
  • M represents a different total number of cyclic shifts that need to be generated.
  • N zc 13
  • Table 12 lists the five different ZC sequences obtained by taking different values.
  • N zc 13
  • the length of the ZC sequence is 13.
  • a ZC sequence of length 15 is obtained, and a pilot sequence needs to be generated in an extended manner.
  • One of the extended ways is:
  • pilot sequence can be used
  • a plurality of different sequences can be generated by employing different roots and/or different cyclic shifts.
  • a plurality of sequences of length 30 can be generated using different shift truncations of the m-sequence of length 31.
  • the Gold sequence generated by two m-sequences, can generate a plurality of different Gold sequences of integer multiples of 15 in the same manner. I won't go into details here.
  • the BS uses the RE bearer RS in the RU to indicate the type of data carried by the RU, and has the following indication manners:
  • the first indication manner is that the pilot sequence indicates the type of the schedulable periodic time-frequency resource.
  • the pilot sequence in the RU carrying the PDCCH is different from the pilot sequence in the RU carrying the PDSCH, and the pilot sequence in the RU carrying the PDCCH of each coverage level is different from the pilot sequence of the RU carrying the PDSCH.
  • One possible indication is that all pilot sequences carried by one RU are the same, and the pilot sequences of RUs carrying different data types are different. That is, the type of time-frequency resource of the schedulable period is indicated by a different pilot sequence.
  • Table 14 shows an implementation of the type of data carried by the RU
  • Table 15 shows an implementation of the type of data carried by the RU
  • Table 16 shows an implementation of the type of data carried by the RU
  • Table 17 shows an implementation of the type of data carried by the RU
  • a combination of at least two of the pilot sequences indicates the type of the schedulable periodic time-frequency resource. That is to say, any two pilot sequences in all pilot sequences carried by one RU are different, and the combinations of pilot sequences carrying RUs of different data types are different.
  • Table 18 shows an implementation of the type of data carried by the RU
  • Table 19 shows an implementation of the type of data carried by the RU
  • the second indication mode is: whether the data type of the RU bearer changes by using the pilot sequence in the RU. If the data type of the RU bearer changes, the pilot sequence in the RU changes, if the data carried by the RU The type remains unchanged and the pilot sequence in the RU does not change. That is, if the data type of the next RU is the same as that of the current RU, the pilot sequences carried by the two RUs are the same, otherwise the pilot sequences carried by the two RUs are different.
  • the pilot sequence carried in the RU of the first slot of the odd subframe is sequence 1, indicating that the RU bears the PDCCH corresponding to level 1 and the next RU is still carrying the PDCCH corresponding to the coverage level 1.
  • the pilot sequence carried in the next RU is also sequence 1; if the data type of the next RU bearer is different from the data type carried by the current RU, for example, the PDCCH corresponding to the coverage level 2 of the next RU bearer bearer, the bearer in the next RU
  • the pilot sequence is sequence 2.
  • the third indication manner is: the pilot sequence indicates the size of the schedulable periodic time-frequency resource, and different types of schedulable time-frequency resources have different sizes, and different pilot sequences are used to indicate different types of the schedulable period.
  • the size of the time-frequency resource That is to say, the number of RUs carrying different data types or the number of CBRUs is represented by a pilot sequence of a bearer of a specific specific RU.
  • the pilot sequences used by the RUs and the pilot sequences carried by the RUs indicate the data types carried by the RUs, which may be pre-agreed or reconfigured according to the broadcast message.
  • the number of RUs carrying the PDCCH and the number of RUs carrying the PDSCH are indicated by a pilot sequence on a specific RU.
  • the number of RUs carrying PDCCHs of different coverage levels and the number of RUs carrying PDSCH are indicated by a pilot sequence on a specific RU.
  • the number of RUs carrying the PDCCH carrying the coverage level 1 is indicated by the pilot sequence carried by the RU on the first time slot starting from the scheduling period, and the RUs on the second and third time slots starting with the scheduling period are utilized.
  • the bearer pilot sequence is used to indicate the number of RUs carrying the PDCCH of the coverage level 2
  • the pilot sequence carried by the RUs on the fourth, fifth, and sixth time slots starting from the scheduling period is used to indicate bearer coverage.
  • the number of RUs of the PDCCH of level 3 is indicated by the pilot sequence carried by the RUs on the sixth, seventh, eighth, and nine time slots starting from the scheduling period, and the number of RUs carrying the PDCCH of the coverage level 4 is indicated.
  • the remaining RUs carrying the PDSCH is indicated by the pilot sequence carried by the RU on the first time slot starting from the scheduling period, and the RUs on the second and third time slots starting with the scheduling period are utilized.
  • the bearer pilot sequence is used to indicate the number of
  • pilot sequences corresponding to the number of different types of RUs, or the number of CBRUs corresponding to different coverage levels, the pilot sequence and the resource size represented by it, can be configured in a broadcast message, and each coverage can have the same Configuration can also have different configurations. Please refer to Table 20, which lists the configuration of 3 in the size of the number of CBRUs corresponding to different pilot sequences.
  • the pilot sequence indicates a high priority data type or corresponds to a different RU type.
  • one RU can carry PDCCHs of different coverage levels, or one RU can carry both PDCCH and PDSCH. Then, the pilot sequence indicates a high priority data type, or the pilot sequence indicates a corresponding RU type according to a predefined rule.
  • the priority of the data type carried in an RU is determined according to a predefined rule or a manner in which the PBCH message is used to notify the UE. If the PDCCH is a high priority, and the PDCCH can only use the active subcarriers 0-7, the pilot sequence can determine which PDCCHs of the coverage class are carried by the active subcarriers in the RU, and the remaining active subcarriers carry the PDSCH. .
  • Step 301 The user equipment UE determines the coverage level of the UE.
  • Step 302 The UE obtains a pilot sequence carried by a schedulable resource in a scheduling period according to at least one pilot sequence stored by the UE.
  • Step 303 The UE determines, according to the type of the schedulable periodic time-frequency resource indicated by the pilot sequence, a resource corresponding to the coverage level.
  • the method for the UE to determine the coverage level of the UE in step 301 is:
  • the base station may send the frequency reuse factor of the base station in the broadcast message, and after de-broadcasting, the UE obtains the frequency reuse factor of the base station and the sub-band information of the UE operation.
  • the UE determines its own coverage level according to its own channel state, and sends a random access request signal to the BS.
  • the random access request signal includes the coverage level information determined by the UE itself, and the BS receives the random access request signal of the UE, and sends the UE a random access request signal to the UE.
  • And sending a random access response signal where the random access response signal carries the coverage level of the UE determined by the base station.
  • the UE uses the coverage level of the UE determined by the base station as the UE's own coverage level.
  • Step 302 The UE determines, as the scheduling period, a sequence in which at least one pilot sequence stored by the UE is the most correlated with a pilot sequence of a RU bearer included in the schedulable resource of the scheduling period.
  • a pilot sequence carried by a resource can be scheduled.
  • the specific implementation process is as follows: the UE uses the locally stored pilot sequence to correlate with the pilot sequence in the RU, where the sequence with the largest correlation peak is considered to be the pilot carried in the RU. sequence.
  • the specific implementation process of the step 303 is that the UE can determine the PDCCH resource that carries the coverage level of the UE, because the UE knows the type of the schedulable periodic time-frequency resource indicated by the pilot sequence stored by the UE.
  • the UE may combine the correlation results of multiple pilot sequences in one RU with the local pilot sequence of the UE, or merge, because each of the multiple RUs of the schedulable resource that constitutes the scheduling period carries one multiple pilot sequence.
  • the comparison result of the multiple pilot sequences in the multiple RUs with the UE local pilot sequence thereby improving the accuracy of the PDCCH resources that the UE determines the coverage level of the UE.
  • the embodiment of the present invention further provides a method for receiving a data packet.
  • the method includes the following steps:
  • Step 401 The user equipment UE determines the coverage level of the UE.
  • Step 402 The UE determines, according to the coverage level of the UE, a resource corresponding to the coverage level.
  • Step 403 The UE receives a data packet of the UE on a predetermined code block resource unit CBRU location in the resource corresponding to the coverage level, where the location of the predetermined CBRU corresponds to the device identifier of the UE.
  • the implementation process of the step 401 and the step 402 may refer to the implementation process of the foregoing steps 301 to 303, and details are not described herein again.
  • the UE determines the resource for carrying the PDCCH corresponding to the coverage level of the UE, as previously mentioned, the location of each CBRU in the multiple CBRUs included in the PDCCH region of the coverage level of the UE may be pre-agreed, and the device identifier of the UE is set.
  • the identifier is then received by the PDCCH sent by the BS to the UE.
  • the coverage level is 4 as an example. If the number of coverage levels changes, it is also within the protection scope of the present invention. That is to say, different pilot sequences can be used to represent PDCCH regions and PDSCH regions of different coverage levels.
  • the method according to the present invention may also be used to represent different types of PDSCH areas by using different pilot sequences, for example, dividing the PDSCH area into PDSCH areas of different coverage levels.
  • the method according to the present invention may also be used to represent different coverage levels by using different pilot sequences.
  • an embodiment of the present invention further provides an apparatus for resource allocation.
  • FIG. 25 is a schematic block diagram of a device for resource allocation according to an embodiment of the present invention.
  • the apparatus includes a resource allocation unit 2501 and a pilot sequence determining unit 2502.
  • the resource allocation unit 2501 is configured to determine, according to the number of data packets that need to be sent to the user equipment in the scheduling period, resources that carry the data packet from the schedulable time-frequency resources of the scheduling period, where the user equipment has coverage a level, the resource corresponding to the coverage level;
  • the pilot sequence determining unit 2502 is configured to determine, according to the coverage level corresponding to the resource, a pilot sequence carried by each resource unit RU that constitutes the resource;
  • the schedulable time-frequency resource of the scheduling period is composed of at least one RU, and the RU is composed of at least one resource element RE, where the RU includes one time slot in the time domain, and includes at least one in the frequency domain.
  • a symbol is included above, and a time-frequency resource of an activated subcarrier is included in the frequency domain.
  • the schedulable time-frequency resource of the scheduling period includes:
  • the remaining resources except the second resource are the remaining resources except the second resource;
  • the first resource is used to carry a physical broadcast channel PBCH
  • the second resource is used to carry a physical synchronization channel PSCH.
  • the resource allocation unit is configured to:
  • the remaining resources except the resources carrying the PDCCH in the schedulable time-frequency resources of the scheduling period are determined as resources for carrying the PDSCH.
  • the resource allocation unit includes:
  • Determining a sub-unit configured to determine, according to the number of data packets corresponding to the coverage level, a number of code block resource units CBRUs corresponding to the coverage level, where the CBRUs include at least one time slot in the time domain, and are in frequency
  • the time domain resource of the at least one active subcarrier is included in the domain, and the CBRUs corresponding to different coverage levels are different;
  • a resource allocation sub-unit configured to determine, according to the number of CBRUs corresponding to the coverage level and the CBRU corresponding to the coverage level, from the schedulable time-frequency resources of the scheduling period, A resource of a data packet, the resource being composed of at least one CBRU corresponding to the coverage level.
  • the resource is composed of at least one CBRU corresponding to the coverage level, including:
  • the number of time slots included in the time domain of the CBRU corresponding to the coverage level is at least one; or
  • the number of the activated subcarriers included in the frequency domain of the CBRU corresponding to the coverage level is at least the same as the number of the activated subcarriers included in the frequency domain of the first resource.
  • the resource carrying the data packet is composed of at least one RU.
  • the number of activated subcarriers included in the frequency domain by the CBRU corresponding to the coverage level is determined according to the number of activated subcarriers included in the frequency domain by the RU.
  • the location of the CBRU corresponding to the coverage level in the schedulable time-frequency resource of the scheduling period has a corresponding relationship with the device identifier of the user equipment.
  • the resource allocation unit 2501 is configured to:
  • the one time slot includes 17 orthogonal frequency division multiplexing OFDM symbols.
  • the data packet includes:
  • the data packet is: a data packet carrying a physical downlink control channel PDCCH; and/or a data packet carrying a physical downlink shared channel PDSCH.
  • FIG. 26 is a schematic structural diagram of a resource allocation apparatus according to an embodiment of the present invention.
  • the device comprises: a processor 2601, a storage 2602, bus 2600.
  • a memory 2602 configured to store program code
  • the processor 2601 is connected to the memory 2602 via a bus 2600 for reading the program code to perform: schedulable time from the scheduling period according to the number of data packets that need to be sent to the user equipment during the scheduling period. Determining, by the frequency resource, a resource that carries the data packet, the user equipment has an coverage level, and the resource corresponds to the coverage level; and each resource unit that constitutes the resource is determined according to a coverage level corresponding to the resource. Pilot sequence carried by the RU;
  • the schedulable time-frequency resource of the scheduling period is composed of at least one RU, and the RU is composed of at least one resource element RE, where the RU includes one time slot in the time domain, and includes at least one in the frequency domain.
  • a symbol is included above, and a time-frequency resource of an activated subcarrier is included in the frequency domain.
  • the schedulable time-frequency resource of the scheduling period includes:
  • the remaining resources except the second resource are the remaining resources except the second resource;
  • the first resource is used to carry a physical broadcast channel PBCH
  • the second resource is used to carry a physical synchronization channel PSCH.
  • the processor 2601 is configured to:
  • the remaining resources except the resources carrying the PDCCH in the schedulable time-frequency resources of the scheduling period are determined as resources for carrying the PDSCH.
  • the processor 2601 is configured to:
  • the time-frequency resources of the sub-carriers are different, and the CBRUs corresponding to the different coverage levels are different; according to the number of CBRUs corresponding to the coverage level and the CBRUs corresponding to the coverage levels,
  • the resource carrying the data packet is determined by the schedulable time-frequency resource of the scheduling period, where the resource is composed of at least one CBRU corresponding to the coverage level.
  • the resource is composed of at least one CBRU corresponding to the coverage level, including:
  • the number of time slots included in the time domain of the CBRU corresponding to the coverage level is at least one; or
  • the number of the activated subcarriers included in the frequency domain of the CBRU corresponding to the coverage level is at least the same as the number of the activated subcarriers included in the frequency domain of the first resource.
  • the resource carrying the data packet is composed of at least one RU.
  • the number of activated subcarriers included in the frequency domain by the CBRU corresponding to the coverage level is determined according to the number of activated subcarriers included in the frequency domain by the RU.
  • the location of the CBRU corresponding to the coverage level in the schedulable time-frequency resource of the scheduling period has a corresponding relationship with the device identifier of the user equipment.
  • the processor 2601 is configured to:
  • the one time slot includes 17 orthogonal frequency division multiplexing OFDM symbols.
  • the data packet includes:
  • the data packet is: a data packet carrying a physical downlink control channel PDCCH; and/or a data packet carrying a physical downlink shared channel PDSCH.
  • bus 2600 can include any number of interconnected buses and bridges, and bus 2600 will include one or more processors and memory 2602 represented by processor 2601. The various circuits of the memory are connected together.
  • the bus 2600 can also connect various other circuits, such as peripherals, voltage regulators, and power management circuits, as is known in the art, and therefore, will not be further described herein.
  • the processor 2601 is responsible for managing the bus 2600 and the usual processing, and the memory 2602 can be used. The data used by the storage processor 2601 when performing an operation.
  • an embodiment of the present invention further provides an apparatus for indicating a resource type.
  • FIG. 27 is a schematic diagram of a module for indicating a resource type according to an embodiment of the present invention.
  • the device may be the aforementioned base station.
  • the apparatus includes a determining unit 2701 and a transmitting unit 2702.
  • the determining unit 2701 is configured to determine a pilot sequence that is carried by the resource unit RU, where the schedulable time-frequency resource of the scheduling period is composed of at least one of the RUs, where the pilot sequence is used to indicate the type of the schedulable periodic time-frequency resource.
  • the schedulable periodic time-frequency resource type includes a third resource and a fourth resource, where the third resource is used to carry a physical downlink control channel PDCCH, and the fourth resource is used to carry a physical downlink shared channel PDSCH;
  • the sending unit 2702 is configured to send the pilot sequence to the user equipment.
  • the RU is a time-frequency resource that includes one time slot in the time domain, and includes at least one active sub-carrier in the frequency domain, where the time slot includes at least one symbol, and the RU includes at least one resource element.
  • RE is a time-frequency resource that includes one time slot in the time domain, and includes at least one active sub-carrier in the frequency domain, where the time slot includes at least one symbol, and the RU includes at least one resource element.
  • 15 REs form a group of time-frequency resource groups for carrying pilot sequences
  • One of the pilot sequences is carried in the RU, and the one pilot sequence is carried by the set of time-frequency resource groups for carrying pilot sequences or by at least one group for carrying pilot sequences.
  • the frequency resource group bears jointly; or
  • At least one of the pilot sequences is carried in the RU, and each pilot sequence in the at least one pilot sequence is carried by a group of time-frequency resource groups for carrying pilot sequences or by at least one group Cooperating with a time-frequency resource group carrying a pilot sequence; or
  • the pilot sequence is composed of at least one time-frequency resource group used to carry a pilot sequence in the RU With the same bearer, each of the at least one RU includes at least one set of time-frequency resource groups for carrying pilot sequences.
  • the pilot sequence indicates the type of the schedulable periodic time-frequency resource, including:
  • the pilot sequence indicates a type of the schedulable periodic time-frequency resource
  • the pilot sequence indicates a size of the schedulable periodic time-frequency resource, and different types of schedulable time-frequency resources have different sizes.
  • the pilot sequence is a sequence whose length is an integer multiple of 15;
  • the sequence whose length is an integer multiple of 15 is generated by a ZC sequence, or
  • the sequence whose length is an integer multiple of 15 is generated by the m sequence, or
  • the sequence whose length is an integer multiple of 15 is generated by the Gold sequence.
  • FIG. 28 is a schematic structural diagram of an apparatus for indicating a resource type according to an embodiment of the present invention.
  • the device may be the aforementioned base station.
  • the apparatus includes a processor 2801, a memory 2802, a transmitter 2803, and a bus 2800.
  • a memory 2802 configured to store program code
  • the processor 2801 is connected to the memory 2802 via the bus 2800, and is configured to read the program code, to perform: determining a pilot sequence carried by the resource unit RU, where the schedulable time-frequency resource of the scheduling period is configured by at least one of the RUs
  • the pilot sequence is used to indicate the type of the schedulable periodic time-frequency resource, and the type of the schedulable periodic time-frequency resource includes a third resource and a fourth resource, where the third resource is used to carry the physical a downlink control channel PDCCH, where the fourth resource is used to carry a physical downlink shared channel PDSCH;
  • the transmitter 2803 is connected to the processor 2801 via the bus 2800 to perform: sending the pilot sequence to the user equipment.
  • the RU is a time-frequency resource that includes one time slot in the time domain, and includes at least one active sub-carrier in the frequency domain, where the time slot includes at least one symbol, and the RU includes at least one resource element.
  • RE is a time-frequency resource that includes one time slot in the time domain, and includes at least one active sub-carrier in the frequency domain, where the time slot includes at least one symbol, and the RU includes at least one resource element.
  • 15 REs form a group of time-frequency resource groups for carrying pilot sequences
  • One of the pilot sequences is carried in the RU, and the one pilot sequence is carried by the set of time-frequency resource groups for carrying pilot sequences or by at least one group for carrying pilot sequences.
  • the frequency resource group bears jointly; or
  • At least one of the pilot sequences is carried in the RU, and each pilot sequence in the at least one pilot sequence is carried by a group of time-frequency resource groups for carrying pilot sequences or by at least one group Cooperating with a time-frequency resource group carrying a pilot sequence; or
  • the pilot sequence is jointly carried by at least one time-frequency resource group for carrying a pilot sequence in the RU, and each RU of the at least one RU includes at least one group of time-frequency resources for carrying a pilot sequence. group.
  • the pilot sequence indicates the type of the schedulable periodic time-frequency resource, including:
  • the pilot sequence indicates a type of the schedulable periodic time-frequency resource
  • the pilot sequence indicates a size of the schedulable periodic time-frequency resource, and different types of schedulable time-frequency resources have different sizes.
  • the pilot sequence is a sequence whose length is an integer multiple of 15;
  • the sequence whose length is an integer multiple of 15 is generated by a ZC sequence, or
  • the sequence whose length is an integer multiple of 15 is generated by the m sequence, or
  • the sequence whose length is an integer multiple of 15 is generated by the Gold sequence.
  • bus 2800 can include any number of interconnected buses and bridges, and bus 2800 will include one represented by processor 2801.
  • the various circuits of the memory represented by the plurality of processors and the memory 2802 are connected together.
  • the bus 2800 can also connect various other circuits, such as peripherals, voltage regulators, and power management circuits, as is known in the art, and therefore, will not be further described herein.
  • Bus interface 2804 provides an interface between bus 2800 and transmitter 2803.
  • Transmitter 2803 can be a transceiver that provides means for communicating with various other devices on a transmission medium.
  • the processor 2801 is responsible for managing the bus 2800 and the usual processing, and the memory 2802 can be used to store data used by the processor 2801 when performing operations.
  • an embodiment of the present invention further provides an apparatus for identifying a resource type.
  • FIG. 29 is a schematic diagram of a module for identifying a resource type according to an embodiment of the present invention.
  • the device may be the aforementioned user equipment.
  • the apparatus includes a coverage level determining unit 2901, an obtaining unit 2902, and a resource determining unit 2903.
  • a coverage level determining unit 2901 configured to determine a coverage level of the user equipment UE
  • the obtaining unit 2902 is configured to obtain, according to the at least one pilot sequence stored by the UE, a pilot sequence of a schedulable resource bearer of a scheduling period;
  • the resource determining unit 2903 is configured to determine, according to the type of the schedulable periodic time-frequency resource indicated by the pilot sequence, a resource corresponding to the coverage level.
  • the obtaining unit 2902 is configured to:
  • the apparatus for identifying the resource type of the present embodiment is also applicable to the method for identifying the resource type in the present embodiment by using the foregoing detailed description of the method for identifying the resource type, so that the method for identifying the resource type in the embodiment is known. Concise, no longer detailed here.
  • FIG. 30 is a schematic structural diagram of an apparatus for identifying a resource type according to an embodiment of the present invention.
  • the device may be the aforementioned user equipment.
  • the apparatus includes a processor 3001, a memory 3002, and a bus 3000.
  • a memory 3002 configured to store program code
  • the processor 3001 is connected to the memory 3002 through the bus 3000, and is configured to read the program code, to perform: determining a coverage level of the UE; and obtaining a schedulable period of the scheduling period according to the at least one pilot sequence stored by the UE a pilot sequence of the resource bearer; determining, according to the type of the schedulable periodic time-frequency resource indicated by the pilot sequence, a resource corresponding to the coverage level.
  • the processor 3001 is configured to:
  • bus 3000 can include any number of interconnected buses and bridges, and bus 3000 will include one or more processors and memory 3002 represented by processor 3001. The various circuits of the memory are connected together.
  • the bus 3000 can also connect various other circuits, such as peripherals, voltage regulators, and power management circuits, as is well known in the art, and therefore, will not be further described herein.
  • the processor 3001 is responsible for managing the bus 3000 and the usual processing, and the memory 3002 can be used to store data used by the processor 3001 when performing operations.
  • an embodiment of the present invention further provides an apparatus for receiving a data packet.
  • FIG. 31 is a schematic diagram of a module for receiving a data packet according to an embodiment of the present invention.
  • the device may be the aforementioned user equipment.
  • the apparatus includes a coverage level determining unit 3101, a resource determining unit 3102, and a data packet receiving unit 3103.
  • a coverage level determining unit 3101 configured to determine a coverage level of the user equipment UE
  • the resource determining unit 3102 is configured to determine, according to the coverage level of the UE, a resource corresponding to the coverage level;
  • a data packet receiving unit 3103 configured to receive, according to a predetermined code block resource unit CBRU location in a resource corresponding to the coverage level, a data packet of the UE, where a location of the predetermined CBRU corresponds to a device identifier of the UE .
  • FIG. 32 is a schematic structural diagram of an apparatus for receiving a data packet according to an embodiment of the present invention.
  • the device may be the aforementioned user equipment.
  • the apparatus includes a processor 3201, a memory 3202, a receiver 3203, and a bus 3200.
  • a memory 3202 configured to store program code
  • the processor 3201 is connected to the memory 3202 via a bus 3200 for reading the program code to perform:
  • Determining a coverage level of the user equipment UE Determining a coverage level of the user equipment UE; determining, according to the coverage level of the UE, a resource corresponding to the coverage level;
  • the receiver 3203 is connected to the processor 3201 via the bus 3200 to perform:
  • bus 3200 can include any number of interconnected buses and bridges, and bus 3200 will include one or more processors and memory 3202 represented by processor 3201. The various circuits of the memory are connected together.
  • the bus 3200 can also connect various other circuits, such as peripherals, voltage regulators, and power management circuits, as is known in the art, and therefore, will not be further described herein.
  • Bus interface 3204 provides an interface between bus 3200 and receiver 3203.
  • Receiver 3203 can be a transceiver that provides means for communicating with various other devices on a transmission medium.
  • the processor 3201 is responsible for managing the bus 3200 and the usual processing, and the memory 3202 can be used to store data used by the processor 3201 when performing operations.
  • the disclosed system, apparatus, and method may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit or unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be used. Combinations can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separate.
  • the components displayed for the unit may or may not be physical units, ie may be located in one place, or may be distributed over multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium.
  • a computer readable storage medium A number of instructions are included to cause a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to execute all or part of the steps of the methods described in various embodiments of the present application.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a ROM (Read-Only Memory), a RAM (Random Access Memory), a disk or an optical disk, and the like, which can store program codes. .

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne l'attribution de ressources, l'instruction et la reconnaissance de type de ressources, et des procédés et des appareils de réception de données, de façon à mettre en œuvre une attribution de ressources temps-fréquence flexible, et à améliorer l'utilité de ressources temps-fréquence. Le procédé d'attribution de ressources comprend les étapes consistant : à déterminer, selon une quantité de paquets de données qui doivent être envoyés à un équipement utilisateur au cours d'un cycle de planification, une ressource prenant en charge les paquets de données à partir de ressources temps-fréquence planifiables du cycle de planification, l'équipement utilisateur ayant une classe de couverture, et la ressource correspondant à la classe de couverture ; et à déterminer, en fonction de la classe de couverture correspondant à la ressource, une séquence pilote qui est prise en charge par chaque unité de ressource (RU) formant la ressource.
PCT/CN2015/087852 2015-08-21 2015-08-21 Attribution de ressources, instruction et reconnaissance de type de ressources, et procédés et appareils de réception de données WO2017031643A1 (fr)

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CN201580067796.5A CN107113796A (zh) 2015-08-21 2015-08-21 资源分配、指示及识别资源类型、接收数据的方法及装置

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