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WO2016033962A1 - Procédé et dispositif de multiplexage de canaux - Google Patents

Procédé et dispositif de multiplexage de canaux Download PDF

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Publication number
WO2016033962A1
WO2016033962A1 PCT/CN2015/075268 CN2015075268W WO2016033962A1 WO 2016033962 A1 WO2016033962 A1 WO 2016033962A1 CN 2015075268 W CN2015075268 W CN 2015075268W WO 2016033962 A1 WO2016033962 A1 WO 2016033962A1
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Prior art keywords
control channel
transmission mode
data traffic
ecce
channel
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PCT/CN2015/075268
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English (en)
Chinese (zh)
Inventor
石靖
戴博
夏树强
方惠英
刘锟
鲁照华
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中兴通讯股份有限公司
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Publication of WO2016033962A1 publication Critical patent/WO2016033962A1/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

  • This article covers the field of wireless communications.
  • MTC Machine Type Communication
  • UE User Equipment
  • M2M Machine to Machine
  • LTE Long-Term Evolution
  • LTE-Advance or LTE-A Long-Term Evolution Advance
  • MTC multi-class data services based on LTE/LTE-A will also be more attractive.
  • the LTE/LTE-A system is transmitted based on dynamic scheduling of each subframe, that is, each subframe can transmit different control channels.
  • a PDCCH Physical Downlink Control Channel
  • EPDCCH Enhanced Physical Downlink Control Channel
  • Both the PDCCH and the EPDCCH may be scheduled to perform downlink and uplink data information transmission by indicating a Physical Downlink Shared Channel (PDSCH) and a Physical Uplink Shared Channel (PUSCH).
  • FIG. 1 is a schematic diagram of resource occupancy of each channel in a downlink subframe of an LTE/LTE-A system. As shown in FIG.
  • the PDCCH occupies a plurality of OFDM (Orthogonal Frequency Division Multiplexing) symbols of a full bandwidth.
  • the EPDCCH and the PDSCH occupy a part of the bandwidth in a frequency division multiplexing manner, that is, a part of a physical resource block (PRB) resource, which is located on the OFDM symbol after the PDCCH.
  • the downlink control channel adopts blind detection, and the UE attempts to demodulate the downlink control channel with different aggregation levels and candidate sets in a certain search space.
  • Table 1 is the PDCCH search space of the UE
  • Table 2 is the EPDCCH search space of the UE (in the case of a distributed EPDCCH PRB set).
  • the search space is composed of candidate sets corresponding to different aggregation levels.
  • the UE demodulates the control channel, it needs to try to demodulate each candidate set until the demodulation is correct. Otherwise, it is considered that no control channel belongs to itself.
  • the PDCCH/EPDCCH is used to carry Downlink Control Information (DCI), and the DCI includes: uplink and downlink scheduling information, and uplink power control information.
  • DCI Downlink Control Information
  • the MTC terminal can obtain DCI by demodulating the PDCCH/EPDCCH channel in each subframe in order to implement demodulation of the PDSCH and scheduling indication information of the PUSCH.
  • a significant requirement for MTC terminals is the lower cost.
  • One of the current methods for reducing the cost is to reduce the receiving bandwidth of the MTC terminal.
  • the ordinary terminal still uses the system bandwidth as the receiving bandwidth, and the MTC terminal uses 1.4 MHz as the receiving bandwidth.
  • MTC terminals use narrowband receive bandwidth, the total resources available are very limited.
  • the narrowband reception bandwidth used by the MTC terminal is smaller than the system bandwidth, the PDCCH cannot work.
  • the EPDCCH is used, the control channel and the service channel independently configure the respective PRB resources in a narrowband situation, which is prone to resource waste. For example, when the EPDCCH channel uses distributed transmission, it occupies 4 PRB or 6 PRB.
  • the Enhanced Control Channel Element (ECCE) resource remains.
  • MTC terminals usually have small data. Packet characteristics, the current PDSCH channel uses 16 bits (bit) at the lowest bit rate of 1 PRB. If the MTC service is a packet service, assuming that it is on the order of 10 bits, then using the entire PRB transmission when the channel condition is good is also a waste of resources. .
  • the embodiment of the invention provides a channel multiplexing method and device, which can improve the utilization efficiency of system resources.
  • the embodiment of the invention provides a method for channel multiplexing, including:
  • the data traffic channel and the control channel share the same resource in the transmission mode
  • the control information carried in the control channel in the transmission mode includes a downlink scheduling grant, or an uplink scheduling grant, or an uplink and downlink scheduling grant;
  • the number of candidate locations of the control channel in the transmission mode is less than the first preset threshold.
  • the sharing of the same resource by the data traffic channel and the control channel includes:
  • the data traffic channel and the control channel jointly occupy one or more physical resource blocks PRB; wherein the data traffic channel and the resource unit occupied by the control channel are one or more enhanced control channel elements ECCE.
  • the data service channel and the control channel share the same resource
  • the base station uses the high layer signaling to notify the UE of the number range of the ECCE occupied by the control channel.
  • the determining, by the base station, a transmission mode of the data traffic channel includes: determining, by the base station, a location of an ECCE occupied by the control channel in a predefined or fixed manner; the base station adopting a predefined or fixed manner or the control
  • the control information carried in the channel indicates the location of the ECCE occupied by the UE data traffic channel.
  • the N2 is equal to the N1, or is a multiple of the N1, or is a fixed value.
  • the determining, by the base station, the transmission mode of the data traffic channel includes: determining, by the base station, a location of an ECCE in the control channel occupation resource, including a location of an ECCE corresponding to the first set, and determining that the data traffic channel occupies resources
  • the location of the ECCE is the location of the ECCE corresponding to the second set; wherein the first set is one of a plurality of sets obtained by dividing the resource, and the second set is the obtained multiple set Another collection in .
  • the determining, by the base station, the transmission mode of the data traffic channel includes: determining, by the base station, that the location of the ECCE in the resource is the location of the ECCE corresponding to the candidate set of the X aggregation levels; Is a positive integer less than or equal to the second predetermined threshold.
  • the number of the candidate positions of the control channel in the transmission mode is smaller than the first preset threshold, where the number of aggregation levels occupied by the control channel in the transmission mode is less than or equal to a second preset threshold, and all aggregation levels are respectively The sum of the number of corresponding candidate sets is less than or equal to the first preset threshold.
  • the first preset threshold is 8, or 16, or 24, or 32, and the second preset threshold is 2, or 4, or 5.
  • the downlink scheduling grant includes: a downlink resource allocation RA domain, an uplink RA domain, a downlink modulation and coding policy MCS, an uplink MCS, a downlink new data indication NDI, an uplink NDI, and a downlink hybrid automatic repeat request HARQ process.
  • a downlink resource allocation RA domain an uplink RA domain
  • a downlink modulation and coding policy MCS an uplink MCS
  • a downlink new data indication NDI a downlink new data indication NDI
  • an uplink NDI an uplink hybrid automatic repeat request HARQ process.
  • a downlink hybrid automatic repeat request HARQ process One or more.
  • the downlink RA domain includes: indicating a length of an ECCE and/or a PRB occupied by the data traffic channel.
  • the embodiment of the invention provides a method for channel multiplexing, including:
  • the user equipment UE determines a transmission mode of the data traffic channel; receives a data traffic channel according to the determined transmission mode; wherein the determined transmission mode has at least one or more of the following features:
  • the data traffic channel and the control channel share the same resource in the transmission mode
  • the control information carried in the control channel in the transmission mode includes a downlink scheduling grant, or an uplink scheduling grant, or an uplink and downlink scheduling grant;
  • the number of candidate locations of the control channel in the transmission mode is less than the first preset threshold.
  • the determining, by the UE, a transmission mode of the data traffic channel includes:
  • the receiving the data traffic channel according to the determined transmission mode includes:
  • the control channel is blindly detected at a predefined or fixed location, and the data traffic channel is obtained according to a control channel obtained by blind detection.
  • the blindly checking the control channel at a predefined or fixed location includes:
  • the blindly checking the control channel at a predefined or fixed location includes:
  • the control channel is blindly detected by the enhanced control channel unit ECCE corresponding to the first set; wherein the first set is one of a plurality of sets obtained by dividing the resource.
  • the blindly checking the control channel at a predefined or fixed location includes:
  • the enhanced control channel unit ECCE corresponding to the candidate sets of the X aggregation levels performs blind detection on the control channel; wherein X is a positive integer less than or equal to a second predetermined threshold.
  • the number of the candidate positions of the control channel in the transmission mode is smaller than the first preset threshold, where the number of aggregation levels occupied by the control channel in the transmission mode is less than or equal to a second preset threshold, and all aggregation levels are respectively The sum of the number of corresponding candidate sets is less than or equal to the first preset threshold.
  • the first preset threshold is 8, or 16, or 24, or 32
  • the second preset threshold The value is 2, or 4, or 5.
  • the downlink scheduling grant includes at least: a downlink resource allocation RA domain, an uplink RA domain, a downlink modulation and coding policy MCS, an uplink MCS, a downlink new data indication NDI, an uplink NDI, and a downlink hybrid automatic repeat request HARQ process.
  • a downlink resource allocation RA domain an uplink RA domain
  • a downlink modulation and coding policy MCS an uplink MCS
  • a downlink new data indication NDI a downlink new data indication NDI
  • an uplink NDI an uplink NDI
  • a downlink hybrid automatic repeat request HARQ process a downlink hybrid automatic repeat request HARQ process.
  • the downlink RA domain includes: an length of an enhanced control channel unit ECCE and/or a physical resource block PRB indicating the data traffic channel occupation.
  • An embodiment of the present invention further provides a device for channel multiplexing, including:
  • Determining a module configured to determine a transmission mode of the data traffic channel
  • a sending module configured to send a data traffic channel according to the determined transmission mode; wherein the determined transmission mode has at least one or more of the following features:
  • the data traffic channel and the control channel share the same resource in the transmission mode
  • the control information carried in the control channel in the transmission mode includes at least a downlink scheduling grant, or an uplink scheduling grant, or an uplink and downlink scheduling grant;
  • the number of candidate locations of the control channel in the transmission mode is less than the first preset threshold.
  • the determining module is configured to:
  • the determining module is configured to:
  • N the number of ECCEs in the shared resource
  • N1 the number of ECCEs occupied by the control channel in each N1+N2 ECCEs
  • N2 the number of ECCEs occupied by the data traffic channel.
  • the determining module is configured to:
  • An embodiment of the present invention further provides a device for channel multiplexing, including:
  • Determining a module configured to determine a transmission mode of the data traffic channel
  • a receiving module configured to receive a data traffic channel according to the determined transmission mode; wherein the determined transmission mode has at least one or more of the following features:
  • the data traffic channel and the control channel share the same resource in the transmission mode
  • the control information carried in the control channel in the transmission mode includes a downlink scheduling grant, or an uplink scheduling grant, or an uplink and downlink scheduling grant;
  • the number of candidate locations of the control channel in the transmission mode is less than the first preset threshold.
  • the determining module is configured to:
  • the determining module is specifically configured to:
  • the control channel is blindly detected at a predefined or fixed location, and the data traffic channel is obtained according to a control channel obtained by blind detection.
  • the determining module is further configured to:
  • the determining module is further configured to:
  • the ECCE corresponding to the first set performs blind detection on the control channel; wherein the first set is one of a plurality of sets obtained by dividing the resource.
  • the determining module is further configured to:
  • the enhanced control channel unit ECCE corresponding to the candidate sets of the X aggregation levels performs blind detection on the control channel; wherein X is a positive integer less than or equal to a second predetermined threshold.
  • the embodiment of the invention further provides a computer readable storage medium, which stores a computer executable finger
  • the computer executable instructions are used to perform the above method.
  • the embodiment of the present invention includes: determining, by a base station, a transmission mode of a data traffic channel; and transmitting a data traffic channel according to the determined transmission mode; wherein the determined transmission mode has at least one or more of the following characteristics: transmitting The data traffic channel and the control channel share the same resource in the mode; the control information carried in the control channel in the transmission mode includes at least a downlink scheduling grant, or an uplink scheduling grant, or an uplink and downlink scheduling grant; and the number of candidate locations of the control channel in the transmission mode Less than the preset threshold.
  • the data traffic channel in the transmission mode and the control channel of the scheduling data traffic channel share the same resource; or the control information carried in the control channel in the transmission mode includes a downlink scheduling authorization, or an uplink scheduling authorization, or The uplink and downlink scheduling authorization; or the number of candidate locations of the control channel in the transmission mode is less than a preset threshold, thereby improving the utilization efficiency of system resources.
  • 1 is a schematic diagram of resource occupancy of each channel in a downlink subframe of an LTE/LTE-A system
  • FIG. 2 is a schematic diagram of sharing the same resource between a data traffic channel and a control channel according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of a data traffic channel or a control channel occupying one or more ECCEs in a PRB according to an embodiment of the present invention
  • FIG. 4 is a schematic structural diagram of a device for channel multiplexing according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of another apparatus for channel multiplexing according to an embodiment of the present invention.
  • the embodiment of the invention provides a method for channel multiplexing, comprising: determining, by a base station, a transmission mode of a data traffic channel, and transmitting a data traffic channel according to the determined transmission mode.
  • the determined transmission mode has at least one or more of the following features:
  • the data traffic channel and the control channel share the same resource in the transmission mode
  • the control information carried in the control channel in the transmission mode includes at least a downlink scheduling grant, or an uplink scheduling grant, or an uplink and downlink scheduling grant;
  • the number of candidate locations of the control channel in the transmission mode is less than the first preset threshold.
  • the UE may be a narrowband MTC UE or a new version UE
  • the data traffic channel may be a PDSCH
  • the control channel may be an EPDCCH.
  • the data service channel and the control channel share the same resource, where the data traffic channel and the control channel jointly occupy one or more PRBs in the resource; wherein the resource unit occupied by the data traffic channel and the control channel is one or more ECCEs.
  • each PRB includes two or four ECCEs.
  • the data traffic channel and the control channel may be multiplexed in units of PRBs or may be multiplexed in units of ECCE.
  • the X PRBs are a set set, and the data traffic channel and the control channel jointly occupy the ECCE in the set set.
  • 2 is a schematic diagram of sharing the same resource between a data traffic channel and a control channel.
  • the PDSCH shares a set with the EPDCCH, and the set is 6 PRBs corresponding to the narrowband.
  • the EPDCCH occupies the 1st and 5th PRBs, and the PDSCH occupies the 3rd PRB.
  • the EPDCCH and the PDSCH jointly occupy the 2nd, 4th, and 6th PRBs.
  • one ECCE may be used to transmit control information, and the remaining three ECCEs are used to transmit a data traffic channel.
  • 3 is a schematic diagram of a data traffic channel or control channel occupying one or more ECCEs in a PRB. As shown in FIG. 3, the EPDCCH occupies one ECCE, and the PDSCH occupies three ECCEs.
  • one of the PRBs is used to transmit data traffic channels and control channels, and the remaining PRBs are used to separately transmit data traffic channels or control channels.
  • the determining, by the base station, the transmission mode of the data traffic channel includes: determining, by the base station, the location of the ECCE occupied by the control channel in a predefined or fixed manner, where the base station indicates the data traffic channel by using the control information carried in the predefined or fixed manner or the control channel. The location of the ECCE.
  • the base station separately encodes the data traffic channel and the control channel, and the UE receives the data traffic channel Before demodulating the control channel, the ECCE corresponding to the candidate set of each aggregation level (AL, Aggregate Level) is blindly detected according to the existing EPDCCH decoding rule.
  • AL Aggregate Level
  • the location of the ECCE occupied by the control channel and the data traffic channel of each UE may be mapped by the following two methods: first, mapping a control channel of a UE and The location of the ECCE occupied by the data traffic channel, and then the location of the ECCE occupied by the control channel and the data traffic channel of another UE; the other is to map the base station scheduler when all UEs can be scheduled in one subframe.
  • mapping a control channel of a UE and The location of the ECCE occupied by the data traffic channel and then the location of the ECCE occupied by the control channel and the data traffic channel of another UE; the other is to map the base station scheduler when all UEs can be scheduled in
  • the location of the ECCE occupied by the data service channel or the control channel may be fixed or unfixed. If there are ECCE fragments in the resource, the ECCE fragment can be used to transmit the uplink scheduling grant.
  • the determining, by the base station, the transmission mode of the UE includes: using the higher layer signaling to notify the UE of the number range of the ECCE occupied by the control channel.
  • the high layer signaling carries a set of locations of ECCEs occupied by the control channel.
  • the UE can perform blind detection on the control channel at a fixed location.
  • the single detection size is N1 ECCEs, the detection step size is (N1+N2), and the number of detections is N.
  • N2 is equal to N1, or a multiple of N1, or a fixed value.
  • the single detection size is N1 ECCEs
  • the detection step size is a multiple of N1 or a fixed value.
  • the detection step size of the UE may be N1.
  • the determining, by the base station, the transmission mode of the data traffic channel includes: determining, by the base station, that the location of the ECCE in the resource occupied by the control channel is at least the location of the ECCE corresponding to the first set, and determining the location of the ECCE in the resource occupied by the data traffic channel as the second set.
  • the resource is divided into two sets, one of which is the first set, and the second set is the other set obtained.
  • the determining, by the base station, the transmission mode of the data traffic channel includes: determining, by the base station, the location of the ECCE in the resource occupied by the control channel as the location of the ECCE corresponding to the candidate set of the X aggregation levels; where X is less than or equal to the second preset threshold.
  • a positive integer In this way, when the UE is blindly checking the control channel, the UE starts detecting from the ECCE with the number 0, and detects the number of ECCEs corresponding to the candidate set of the X aggregation levels in a single detection, and the detection step is the smallest of the X aggregation levels.
  • the multiple of the number of ECCEs corresponding to the candidate set is a fixed value.
  • the positions of the ECCEs in the above three control channel occupation resources may be combined with each other.
  • the number of candidate positions of the control channel in the transmission mode is smaller than the first preset threshold.
  • the number of aggregation levels occupied by the control channel in the transmission mode is less than or equal to the second preset threshold, and the sum of candidate sets corresponding to each aggregation level. Less than or equal to the first preset threshold.
  • the first preset threshold may be 8, or 16, or 24, or 32, and the second preset threshold may be 2, or 4, or 5.
  • the uplink and downlink scheduling authorization includes at least: a downlink resource allocation (RA), an uplink RA domain, a modulation and coding scheme (MCS), an uplink MCS, and a downlink new data indication (NDI, New Data).
  • RA downlink resource allocation
  • MCS modulation and coding scheme
  • NDI downlink new data indication
  • HARQ Hybrid Automatic Repeat Request
  • the ECCE other than the ECCE occupied by each user in the resource is used to transmit the uplink and downlink scheduling authorization. For example, if the subframe k includes N ECCEs and k ECCEs, the base station scheduler schedules m users to transmit downlink data traffic channels, and m users occupy m*(N1+N2) ECCEs, and the remaining in subframe k N ECCE, k -m * (N1 + N2) ECCE users transmit uplink scheduling grants. If m users just occupy N ECCEs and k ECCEs in subframe k, then uplink scheduling grants are not transmitted in subframe k.
  • the downlink RA domain includes: a length indicating an ECCE and/or a PRB occupied by the data traffic channel (ie, the number of occupied ECCEs and/or PRBs).
  • the base station determines that the location of the ECCE in the control channel occupation resource is (n-1)*(N1+N2) to (n-1)*(N1+N2)+N1-1, and n is greater than or equal to 1 and less than or
  • the value is equal to M
  • the length of the ECCE in the downlink RA field indicating that the data traffic channel is occupied is N2.
  • the value of M is Or N ECCE,k .
  • the length of the ECCE occupied by the data traffic channel may be Upstream RA domain or downlink RA domain needs at most
  • the bit can indicate the length of the ECCE occupied by the data traffic channel.
  • N ECCE,k is the total number of ECCEs in the resource of subframe k.
  • the downlink RA field may not be required to indicate the length of the ECCE occupied by the data traffic channel.
  • the downlink RA field may use 1 bit to indicate that the length of the ECCE occupied by the data traffic channel is twice the length of N1 or N1, and the length of the ECCE occupied by the 2-bit data traffic channel is 1 to 4 times the length of N1. .
  • the remaining ECCEs are used to transmit the data traffic channel; the RA domain indication is not needed, and after the UE detects the control channel, the PRB is in the PRB.
  • the remaining ECCE is the ECCE occupied by the data traffic channel.
  • the RA field indicates the occupied PRB location and the length of the ECCE.
  • the embodiment of the present invention further provides a method for channel multiplexing, including:
  • the data traffic channel and the control channel share the same resource in the transmission mode
  • the control information carried in the control channel in the transmission mode includes at least a downlink scheduling grant, or an uplink scheduling grant, or an uplink and downlink scheduling grant;
  • the number of candidate locations of the control channel in the transmission mode is less than the first preset threshold.
  • the UE may determine a transmission mode of the data traffic channel by using high layer signaling from the base station.
  • the high layer signaling includes a transmission mode (for example, TM X).
  • Table 3 shows the transmission mode.
  • the transmission mode of the data traffic channel can be TM X.
  • the format of the transmission control information may be DCI format X or DCI format 1A; when the format of the transmission control information is DCI format X, the specific transmission scheme of TM X is to use single antenna port, port 0, or transmit diversity; when transmitting control information
  • the format is DCI format 1A, the specific transmission scheme of TM X is to use a single antenna port, port 7-10, or port 7, 9 alternately between REs.
  • TM X is a newly defined transmission mode for the downlink data traffic channel, and the transmission mode uses the DMRS pilot port for transmission.
  • the determining, by the UE, the transmission mode of the data traffic channel includes: determining, by the UE, a transmission mode of the data traffic channel according to a transmission mode of the control channel.
  • the UE can obtain the DCI by demodulating the control channel, and determine the transmission mode by using the bit field in the DCI.
  • the transmission mode of the control channel may be centralized or distributed.
  • the transmission mode of the control channel is centralized, the transmission mode of the data traffic channel is TM X, and the format of the control information is DCI format X, the transmission scheme of the data traffic channel is determined to be a single antenna port transmission based on DMRS; when the control channel is The transmission mode is distributed.
  • the transmission mode of the data traffic channel is TM X.
  • the transmission scheme of the data traffic channel is determined to be transmitted based on alternately using different DMRS ports between REs.
  • control channel and the data traffic channel may be sent by using the same port or by using different ports.
  • the port that sends the data traffic channel can also be determined based on the location of the ECCE.
  • the determining, by the UE, the transmission mode of the data service channel includes:
  • the UE determines the transmission mode of the data traffic channel according to the transmission mode of the control channel.
  • the receiving a data traffic channel according to the determined transmission mode includes:
  • the control channel is blindly detected at a predefined or fixed location, and the data traffic channel is obtained according to the control channel obtained by the blind detection.
  • the blind detection of the control channel at a predefined or fixed location includes:
  • the ECCE with the location number (n-1)*(N1+N2) performs blind detection on the control channel, where n is a positive integer greater than or equal to 1, and N1 is occupied by the control channel in each (N1+N2) ECCEs.
  • the number of ECCEs, N2 is the number of ECCEs occupied by the data traffic channel.
  • different UEs can start detecting from different numbers. For example, if the total number of ECCEs that may be detected is 0, 3, 6, 9, 12, 15, 18, 21. UE1 starts detection from the ECCE numbered 0, and the number of detections is 4 times; UE2 starts detection from the ECCE numbered 12, and the number of detections is 4 times.
  • the blind detection of the control channel at a predefined or fixed location includes:
  • the ECCE corresponding to the first set performs blind detection on the control channel; wherein, the first set is one of the sets obtained by dividing the resources.
  • the resource is divided into two sets, the first set is an ECCE numbered 0 to 15, and the second set is started from an ECCE numbered 16; the ECCE corresponding to the first set is used to transmit a control channel, and the second set is corresponding to a second set.
  • the ECCE is used to transmit data traffic channels.
  • the ECCE corresponding to the first set may be used to transmit control channels of multiple users, and each user only needs to detect the ECCE occupied by itself in the first set when detecting.
  • the blind detection of the control channel at a predefined or fixed location includes:
  • the ECCE corresponding to the candidate set of the X aggregation levels performs blind detection on the control channel; where X is a positive integer less than or equal to the second preset threshold.
  • the number of candidate positions of the control channel in the transmission mode is smaller than the first preset threshold.
  • the number of aggregation levels occupied by the control channel in the transmission mode is less than or equal to the second preset threshold, and the number of candidate sets corresponding to each aggregation level is And less than or equal to the first preset threshold.
  • the first preset threshold is 8, or 16, or 24, or 32, and the second preset threshold is 2, or 4, or 5.
  • the downlink scheduling grant includes at least one of: a downlink resource allocation RA domain uplink RA domain, a downlink modulation and coding policy MCS uplink MCS, a downlink NDI, an uplink NDI, and a downlink hybrid automatic repeat request HARQ process.
  • the downlink RA domain includes: a length indicating an ECCE and/or a PRB occupied by the data traffic channel.
  • the base station sends small data packet services to the six MTC UEs at the same time in the narrowband, and multiplexes the same PRB resources with the EPDCCH that schedules the small data packet services.
  • the base station determines that the EPDCCH of the MTC UE occupies the ECCE corresponding to the candidate set of the AL1, and the ECCE after the ECCE occupied by the EPDCCH of the one MTC UE is occupied by the PDSCH scheduled by the PDSCH, and the ECCE occupied by the PDSCH is only a fixed length (3).
  • ECCE occupies ECCE, and EPDCCH uses centralized transmission.
  • the base station uses the DCI format X scheduling to indicate the corresponding PDSCH, which does not include the downlink RA domain.
  • the transmission mode of the PDSCH is represented by the 1 bit in the DCI as the single antenna port 7 transmission mode.
  • the MTC UE starts detecting from the ECCE numbered 0 in the blind detection.
  • the single detection size is 1 ECCE, and the detection step is 4 ECCE.
  • the specific EPDCCH occupies one ECCE, and the PDSCH occupies three ECCEs, and the EPDCCH detects the ECCEs whose location numbers are 0, 4, 8, 12, 16, and 20.
  • the MTC UE further receives the PDSCH in the next three ECCEs by detecting the DCI format X in the EPDCCH.
  • the control channel and the data traffic channel are multiplexed in the narrowband system, and the number of times the MTC UE detects the control channel is reduced by specifying the location of the ECCE occupied by the control channel, and the data traffic channel scheduled by the control channel is reduced.
  • the control information overhead is reduced, so that more MTC UEs with small packet services can be scheduled at the same time. Improve the efficiency of resource use.
  • the base station transmits the small data packet service at the same time in the narrowband for the four MTC UEs, and multiplexes the same PRB resource with the EPDCCH that schedules the small data packet service.
  • the base station determines that the EPDCCH of the MTC UE occupies the ECCE corresponding to the candidate set of AL1 and AL2, and the ECCE after the ECCE occupied by the EPDCCH of one UE is occupied by the PDSCH scheduled by the PDSCH, and the length of the ECCE occupied by the PDSCH is uncertain, and the EPDCCH usage is concentrated. Transmission.
  • the starting position number of the ECCE occupied by the EPDCCH is fixed to 0, 6, 12, and 18.
  • the base station uses the DCI format X scheduling to indicate the corresponding PDSCH, where the downlink RA domain only indicates the length of the ECCE occupied by the PDSCH.
  • the PDSCH is transmitted using the TM X transmission mode.
  • the MTC UE starts detecting from the ECCE numbered 0 in the blind detection.
  • the single detection size is 1 or 2 ECCEs, and the detection step size is 6 ECCEs.
  • the location numbers of the specific EPDCCH detection are 0, 6, 12, and 18.
  • the MTC UE determines the ECCE after the ECCE occupied by the PDSCH is the ECCE after the ECCE occupied by the EPDCCH, and receives the PDSCH through the TM X transmission mode by detecting the DCI format X in the EPDCCH.
  • the control channel and the data traffic channel are multiplexed in the narrowband system, and the number of times the MTC UE detects the control channel and the data scheduled by the control channel are reduced by specifying the starting position of the ECCE occupied by the control channel.
  • the traffic channel is the ECCE after the ECCE occupied by the control channel, and the number of ECCEs occupied by the data traffic channel is an indefinite value, which reduces the overhead of the control information, so that more MTC UEs with small packet services can be scheduled at the same time. Improve the efficiency of resource use.
  • the base station sends the data packet service to the two MTC UEs at the same time in the narrowband.
  • the same PRB resource is multiplexed with the EPDCCH that schedules the data packet service, and the PRB resource can also be occupied independently.
  • the base station determines that the EPDCCH of the MTC UE occupies the ECCE corresponding to the candidate set of the AL2, and only starts from the ECCE with the number 0 in each PRB, and the ECCE after the ECCE occupied by the EPDCCH of the one UE is occupied by the PDSCH scheduled by the UE.
  • the PDSCH also occupies two consecutive PRBs after the PRB, and the EPDCCH uses centralized transmission.
  • the base station uses the DCI format 1A scheduling to indicate the corresponding PDSCH, where the RA domain only indicates The length of the PRB occupied by the PDSCH.
  • the PDSCH is transmitted in the TM X transmission mode, and the single antenna port 0 is used.
  • the MTC UE starts detecting from the ECCE numbered 0 in the blind detection, and detects the ECCE corresponding to each AL in a single test, and detects it in units of PRB.
  • the MTC UE further receives the PDSCH through the TM X on the indicated PRB by detecting the DCI foramt X in the EPDCCH.
  • the PRB includes other ECCEs other than the ECCE occupied by the PRB in which the EPDCCH is scheduled.
  • control channel and the data traffic channel are multiplexed in the narrowband system, and the number of times the MTC UE detects the control channel and the data scheduled by the control channel are reduced by specifying the starting position of the ECCE occupied by the control channel.
  • the service channel is an ECCE other than the ECCE in the PRB occupied by the control channel, and occupies other PRBs separately, reducing the overhead of control information. The resource usage efficiency is improved when scheduling a narrowband MTC UE.
  • the terminal obtains control information by blind detection of the repetition level.
  • different repetition levels correspond to aggregation levels one by one.
  • the base station sends small data packet services to the four MTC UEs at the same time in the narrowband, and multiplexes the same PRB resources with the EPDCCH that schedules the small data packet services.
  • the 24 ECCEs corresponding to the 6 PRBs in the narrowband are divided into two sets. The first set is the first 8 ECCEs, the ECCE number is 0-7, and the second set is the last 16 ECCE resources. The ECCE number is 8-23.
  • the base station determines that the EPDCCH of the MTC UE uses the ECCE corresponding to the candidate set of AL1 and AL2, and uses the ECCE in the first set.
  • the ECCE occupied by the PDSCH of one MTC UE is occupied by the last 16 ECCEs, and the number of ECCEs occupied by the PDSCH is indefinite, which is indicated by the RA domain.
  • the starting position of the EPDCCH has 6 for AL1 and 4 for AL2.
  • the base station uses the DCI 1A scheduling to indicate the corresponding PDSCH, wherein the downlink RA field indicates the location of the ECCE occupied by the data traffic channel.
  • the PDSCH is transmitted using TM X.
  • the MTC UE detects only the first 8 ECCEs when the control channel is blindly detected.
  • the different AL detection locations may be different.
  • the single detection size is the number of ECCEs corresponding to AL1 or multiples of ECCEs.
  • the MTC UE passes the DCI format X in the EPDCCH, and passes the downlink RA and The location of the ECCE occupied by the PDSCH is determined, and the PDSCH is received through the TM X.
  • control channel and the data traffic channel are multiplexed in the narrowband system, and the MTC UE detects the control channel range by specifying different control channel sets and data traffic channel resource sets, thereby reducing the number of times the control channel is detected. Therefore, more MTC UEs with small packet services can be scheduled at the same time, thereby improving resource utilization efficiency.
  • an embodiment of the present invention further provides a device for channel multiplexing, including at least:
  • Determining a module configured to determine a transmission mode of the data traffic channel
  • a sending module configured to send a data traffic channel according to the determined transmission mode; wherein the determined transmission mode has at least one or more of the following features:
  • the data traffic channel and the control channel share the same resource in the transmission mode
  • the control information carried in the control channel in the transmission mode includes at least a downlink scheduling grant, or an uplink scheduling grant, or an uplink and downlink scheduling grant;
  • the number of candidate locations of the control channel in the transmission mode is less than the first preset threshold.
  • the determining module is set to:
  • the base station Determining the location of the ECCE occupied by the control channel in a predefined or fixed manner; the base station indicates the location of the ECCE occupied by the UE data traffic channel by using control information carried in a predefined or fixed manner or in the control channel.
  • the determining module is set to:
  • Determining the location number of the ECCE in the control channel occupation resource is (n-1)*(N1+N2) to (n-1)*(N1+N2), where n is a positive integer greater than or equal to 1, and N1 is each (N1+N2)
  • the number of ECCEs occupied by the control channel in the ECCE, and N2 is the number of ECCEs occupied by the data traffic channel.
  • the determining module is set to:
  • an embodiment of the present invention further provides a device for channel multiplexing, including at least:
  • Determining a module configured to determine a transmission mode of the data traffic channel
  • a receiving module configured to receive a data traffic channel according to the determined transmission mode; wherein the determined transmission mode has at least one or more of the following features:
  • the data traffic channel and the control channel share the same resource in the transmission mode
  • the control information carried in the control channel in the transmission mode includes at least a downlink scheduling grant, or an uplink scheduling grant, or an uplink and downlink scheduling grant;
  • the number of candidate locations of the control channel in the transmission mode is less than the first preset threshold.
  • the determining module is set to:
  • the transmission mode of the data traffic channel is determined according to the transmission mode of the control channel.
  • the determining module is set to:
  • the control channel is blindly detected at a predefined or fixed location, and the data traffic channel is obtained according to the control channel obtained by the blind detection.
  • the determining module is further configured to:
  • the ECCE with position number (n-1)*(N1+N2) performs blind detection on the control channel, where n is a positive integer greater than or equal to 1, and N1 is the control channel in each (N1+N2) ECCEs.
  • the number of occupied ECCEs, and N2 is the number of ECCEs occupied by the data traffic channel.
  • the determining module may also be configured as:
  • the ECCE corresponding to the first set performs blind detection on the control channel; wherein the first set is one of multiple sets obtained by dividing the resources.
  • the determining module may also be configured to:
  • the ECCE corresponding to the candidate set of the X aggregation levels performs blind detection on the control channel; where X is a positive integer less than or equal to the second preset threshold.
  • the embodiment of the invention further provides a computer readable storage medium storing computer executable instructions for performing the above method.
  • all or part of the steps of the above embodiments may also be implemented by using an integrated circuit. These steps may be separately fabricated into individual integrated circuit modules, or multiple modules or steps may be fabricated into a single integrated circuit module. achieve.
  • the devices/function modules/functional units in the above embodiments may be implemented by a general-purpose computing device, which may be centralized on a single computing device or distributed over a network of multiple computing devices.
  • each device/function module/functional unit in the above embodiment When each device/function module/functional unit in the above embodiment is implemented in the form of a software function module and sold or used as a stand-alone product, it can be stored in a computer readable storage medium.
  • the above mentioned computer readable storage medium may be a read only memory, a magnetic disk or an optical disk or the like.
  • the method and apparatus for channel multiplexing provided by the embodiments of the present invention reduce the number of times the MTC UE detects a control channel.
  • the control information overhead is reduced, so that more MTC UEs with small packet services can be scheduled at the same time, which improves resource utilization efficiency.

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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 un procédé de fonctionnement d'un dispositif de multiplexage de canaux comprenant : la détermination, par une station de base, d'un mode de transmission d'un canal de service de données ; l'envoi du canal de service de données conformément au mode de transmission déterminé, le mode de transmission déterminé comprenant au moins une ou plusieurs des caractéristiques suivantes : un canal de service de données et un canal de commande dans un mode de transmission partagent la même ressource ; des informations de commande transportées dans le canal de commande dans le mode de transmission comprennent au moins une autorisation de planification de liaison descendante ou une autorisation de planification de liaison montante, ou une autorisation de planification de liaison montante et de liaison descendante ; le nombre d'emplacements candidats du canal de commande dans le mode de transmission est inférieur à une valeur seuil prédéfinie.
PCT/CN2015/075268 2014-09-05 2015-03-27 Procédé et dispositif de multiplexage de canaux WO2016033962A1 (fr)

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