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WO2013159577A1 - Procédé et dispositif permettant de prendre en charge une communication à bande étroite dans un système à large bande - Google Patents

Procédé et dispositif permettant de prendre en charge une communication à bande étroite dans un système à large bande Download PDF

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Publication number
WO2013159577A1
WO2013159577A1 PCT/CN2013/070173 CN2013070173W WO2013159577A1 WO 2013159577 A1 WO2013159577 A1 WO 2013159577A1 CN 2013070173 W CN2013070173 W CN 2013070173W WO 2013159577 A1 WO2013159577 A1 WO 2013159577A1
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WIPO (PCT)
Prior art keywords
narrowband
mtc
initial
narrowbands
communication
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PCT/CN2013/070173
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English (en)
Chinese (zh)
Inventor
张向东
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华为技术有限公司
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Filing date
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Publication of WO2013159577A1 publication Critical patent/WO2013159577A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling

Definitions

  • Embodiments of the present invention relate to the field of communications technologies, and in particular, to a method and apparatus for supporting narrowband communication in a broadband system. Background technique
  • Provision of low-cost TC UEs based on LTE means providing LTE-based (Long Term Evolution
  • L ⁇ phase evolution
  • System low cost MTC machine type communication
  • UE User Equipment, user equipment
  • GSM Global System for Mobile communications, Global System for Mobile Communications
  • GPRS General Packet Radio Service
  • LTE user equipment with lower cost than user equipment, even lower than GSM/GPRS user equipment, to replace in M2M (machine type communication) applications
  • the applied GSM/GPRS user equipment enables the service provider of the M2M application to select the LTE network to provide the M2M application, thereby realizing the migration of the M2M application from the GSM/GRPS network to the LTE network.
  • one of the ways to implement a low-cost MTC UE is to reduce the transmission/reception bandwidth supported by the user equipment, such as dividing a plurality of narrowbands in the broadband, and selecting a narrowband with better quality of service from the plurality of narrowbands, for the UE and Data transmission between an eNodeB (Evolved NodeB, evolved base station, eNB for short).
  • eNodeB evolved NodeB, evolved base station, eNB for short.
  • the multiple narrowbands are randomly divided from the broadband, the support for the UEs with large bandwidth requirements is affected.
  • the scheduling for the MTC UEs is too random, which is disadvantageous for the MTC UE to adjust the working frequency band to receive the information.
  • an embodiment of the present invention provides a method for supporting narrowband communication in a broadband system, including:
  • an embodiment of the present invention provides an apparatus for supporting narrowband communication in a broadband system, including:
  • a first determining unit configured to determine, according to a service requirement of the at least one machine type communication user equipment MTC UE, a number N of narrowbands used to support the communication of the at least one MTC UE;
  • a second determining unit configured to: according to the channel quality of the at least one MTC UE on the M initial narrowbands, from the M initial narrowbands ⁇ determining the N narrow bands, the ⁇ 1 ⁇ 2 ⁇ 1.
  • an embodiment of the present invention provides a method for supporting narrowband communication in a broadband system, including:
  • the base station determines according to the service requirement of the at least one machine type communication user equipment MTC UE Supporting the number of narrowbands of the at least one MTC UE communication, and determining the narrowband from the initial narrowband according to the ⁇ : the channel quality of one less MTC on the initial narrowband;
  • an embodiment of the present invention provides an apparatus for supporting narrowband communication in a broadband system, including: a first receiving unit, configured to receive a broadcast message sent by a base station, where the broadcast packet carries N narrowband information,
  • the information of the N narrowbands is obtained by: the service requirement of the at least one machine type communication user equipment MTC UE of the base station, determining the number N of narrowbands for supporting the at least one MTC UE communication, according to the at least one MTC Determining, by the UE, the channel quality on the M initial narrowbands, and determining the N narrowbands from the M initial narrowbands;
  • FIG. 1 is a schematic flowchart diagram of a method for supporting narrowband communication in a broadband system according to an embodiment of the present invention.
  • FIG. 2 is a first schematic structural diagram of an apparatus for supporting narrowband communication in a broadband system according to an embodiment of the present invention.
  • FIG. 3 is a second schematic structural diagram of an apparatus for supporting narrowband communication in a broadband system according to an embodiment of the present invention.
  • FIG. 4 is a schematic flowchart diagram of a method for supporting narrowband communication in a broadband system according to another embodiment of the present invention.
  • FIG. 5 is a first schematic structural diagram of an apparatus for supporting narrowband communication in a broadband system according to another embodiment of the present invention.
  • FIG. 6 is a second schematic structural diagram of an apparatus for supporting narrowband communication in a broadband system according to another embodiment of the present invention.
  • FIG. 7 is a schematic diagram of an application scenario of a method for supporting narrowband communication in a broadband system according to an embodiment of the present invention. detailed description
  • an embodiment of the present invention provides a method for supporting narrowband communication in a broadband system, including: 11. determining, according to a service requirement of at least one MTC UE, a narrowband for supporting communication of the at least one MTC UE. Quantity N o
  • An embodiment of the method for supporting narrowband communication in a broadband system is a base station.
  • the base station is an eNodeB (referred to as an eNB) of the LTE system.
  • the maximum working bandwidth of the LTE system is 20M, and 20M is the most popular LTE system.
  • the working bandwidth of the MTC UE can be reduced, for example, to 1.4M, 3M or 5M, etc. 1. 4M, 3M or 5M refers to the maximum working bandwidth of the narrowband MTC UE.
  • the corresponding narrowband numbers may be allocated to the M initial narrowbands, for example, the narrowband number values are 0 to M-1, thereby determining N narrowbands from the M initial narrowbands.
  • N narrowband numbers corresponding to N narrow bands are determined, the positions of the N narrow bands can be determined.
  • the number of narrowbands used to support MTC UE communication may be determined according to the service requirement of the MTC UE in the (cell) within the control range of the base station. Service requirements, such as how many UEs need to be served, or how much data rate needs to be provided, and so on. For example, if a narrowband control channel capacity can only schedule 100 UEs at the same time, if there are 230 UEs in the cell control range (cell), then at least 3 narrowbands are allocated. For details, refer to the prior art. It is understood that it will not be repeated here.
  • the M initial narrowbands may be determined in the following manner: The eNB divides the broadband used by the communication into M initial narrowbands according to the bandwidth of the narrowband.
  • the eNB determines the division criteria of the initial narrowband and performs division, and then broadcasts the division of the initial narrowband to the MTC UE.
  • the number of narrowbands is limited according to service requirements, and the position of the narrowband is limited according to the channel quality, and the multiple narrowbands are randomly divided from the broadband to minimize the splitting of the broadband;
  • the scheduling for the MTC UE is also more targeted, which facilitates the MTC UE to adjust the working band to receive information.
  • the method for supporting narrowband communication in a broadband system in the embodiment of the present invention may further include:
  • the channel quality of each MTC UE on each initial narrowband in the M initial narrowbands is obtained. Obtaining channel quality on each initial narrowband of the M initial narrowbands of each of the plurality of MTC UEs when acquiring the at least one MTC UE, and acquiring channel quality of each of the plurality of MTC UEs on each initial narrowband The weighted average is used as the channel quality of the MMC UEs on the M initial narrowbands.
  • the eNB may maintain a table that stores the channel quality of each MTC UE in each initial narrowband (the initial narrowband corresponds to a narrowband number).
  • the eNB can also obtain a weighted average of the channel qualities of all the MTC UEs on each initial narrowband through the table. For narrowbands with narrowband number 0, the channel is based on the channel quality of the narrowband number 0 narrowband of each MTC UE. Mass weighted average.
  • the manner of obtaining the channel quality of each of the MTC UEs on each initial narrowband includes, but is not limited to: For each initial narrow 'band, the eNB receives an SRS (Sounding Reference Signal) sent by each MTC UE on the initial narrowband to obtain the signal quality of the SRS.
  • SRS Signal
  • the eNB receives a DMRS (Demodulation Reference Si gnal) that is transmitted with each MTC UE along the initial narrowband to obtain the signal quality of the DMRS.
  • DMRS Demodulation Reference Si gnal
  • the MTC UE sends the SRS or the DMRS
  • the eNB receives the SRS or the DMRS
  • the transmission bandwidth of the DMRS is a narrowband data transmission bandwidth, that is, the transmission bandwidth of the DMRS is the same as the narrowband data transmission bandwidth.
  • the method for supporting narrowband communication in the broadband system in the embodiment of the present invention limits the number and location of the narrowband, reduces the transmission bandwidth supported by the MTC UE, and minimizes the splitting of the uplink broadband.
  • the uplink refers to communication from the MTC UE to the eNB direction.
  • the manner of obtaining the channel quality of each MTC UE on each initial narrowband including but not limited to:
  • the eNB For each initial narrowband, the eNB receives a CQI (Channel Quality Indicator) on each initial narrowband fed back by each MTC UE, and obtains a signal quality of the downlink reference signal indicated by the CQI.
  • CQI Channel Quality Indicator
  • the UE obtains the quality of the downlink channel by measuring the downlink reference signal, and feeds back to the base station by means of CQI.
  • the base station obtains the quality of the downlink reference signal through the CQI, that is, obtains the quality of the downlink channel.
  • the eNB receives the measurement result on each initial narrowband fed back by each MTC UE, and acquires the signal quality of the downlink reference signal indicated by the measurement result.
  • the eNB sends the downlink reference signal to the MTC UE, the CQI or the measurement result on each initial narrowband fed back by the MTC UE on each initial narrowband.
  • the related techniques of the CTCI or the measurement result, and the eNB receiving the CQI or the measurement may refer to the prior art for understanding, and are not described herein.
  • the method for supporting narrowband communication in the broadband system in the embodiment of the present invention reduces the receiving (downlink) bandwidth supported by the MTC UE, and also makes the eNB more targeted to the MTC UE scheduling, and facilitates the MTC UE to adjust the working band receiving information.
  • downlink refers to communication from the eNB to the MTC UE direction.
  • determining N narrowbands from the M initial narrowbands according to the channel quality of the MTC UEs on the M initial narrowbands may include:
  • the N narrowbands having the highest channel quality are determined from the M initial narrowbands according to the channel quality of the at least one MTC on the M initial narrowbands.
  • the M initial narrowbands are arranged in descending order of the weighted average of the channel quality or the channel quality, and N are determined as N narrowbands from high to low.
  • the channel quality S is a weighted average of channel qualities of the plurality of MTC UEs on the initial narrowband.
  • the method for supporting the narrowband communication in the broadband system in the embodiment of the present invention may further include: Determining, according to the channel quality of the at least one MTC UE, the narrowest band of the channel quality, supporting the at least one MTC UE communication, and indicating that the at least one MTC UE is the most ambiguous in the channel quality Communication on a narrow band.
  • the t'NB can determine the channel quality of the MTC UE in the narrowband: 3 ⁇ 4, the eNB selects a narrowband from which to serve as a narrowband supporting the MTC UE communication.
  • the eNB may also have other policies to determine the narrowband that supports the MTC UE communication, without limitation.
  • the eNB can also indicate the narrowband of the MTC UE to communicate according to the channel quality of the N narrowbands. Communication refers to the MTC UE in the corresponding narrowband - listening to paging, scheduling or data transmission, and so on. The eNB also pages, schedules, or transmits data to the MTC UE only on the corresponding narrowband, and so on.
  • the method for supporting the narrowband communication in the broadband system in the embodiment of the present invention may further include:
  • the N narrowband information is broadcast to the at least one MTC UE such that at least one MTC UE is used to select a narrowband for communication.
  • the eNB broadcasts N narrowband broadcast modes, and may use an IE (Information Element) added in a conventional system message, or add a dedicated system message.
  • IE Information Element
  • the eNB determines N narrowbands, the eNB does not schedule the narrowband of the MTC UE communication, but the NTC UE selects the narrowband of its communication. For example, the MTC UE selects the signal quality according to the channel quality on the N narrowbands.
  • the narrowband communicates, that is, the MTC UE listens for paging, scheduling, or data transmission in the corresponding narrowband, and the eNB also performs paging, scheduling, or data transmission on the MTC UE only on the corresponding narrowband.
  • the manner of broadcasting the N narrowband information to the MTC UE may include:
  • the eNB broadcasts M flag bit information j ' ' to the MTC UE, where the M flag bits respectively correspond to M initial narrow bands, and it is agreed that when the flag bit is 1, the flag bit corresponds to the initial narrow band as N narrow bands. One of them, or a convention when the flag bit is 0, indicates that the flag bit corresponds to one of the N narrow bands corresponding to the initial narrow band.
  • the bandwidth of the line is 110 RB and the narrow-band granularity is 6 KB, then it can be divided into 18 initial narrow bands. Then, the 18 initial narrow bands can be numbered from high frequency to low frequency, or from low frequency to high frequency, numbered as 0- 17.
  • the 18-bit bitmap can be used to correspond to the initial narrowband of 0-17. For example, the 0 flag of the bitmap indicates the initial narrowband numbered 0, and so on. Then, if the 0 flag of the bitmap is 1/0, then the 0th initial narrowband is used, which can be used for MTC UE communication, that is, one of the selected N narrowbands. Otherwise, the corresponding initial narrowband is not used for the MTC UE. Communication.
  • the method for supporting narrowband communication in a broadband system in the embodiment of the present invention may further include:
  • the above period can be determined according to specific scenarios and specific needs, and can be adjusted, and will not be described here. It can be seen that the eNB tries to determine N narrowbands with better channel quality from the M initial narrowbands for MTC UE communication.
  • the method for supporting narrowband communication in a broadband system in the embodiment of the present invention may further include:
  • the eNB adjusts the number of at least one MTC UE on the N narrowbands according to the communication condition of the at least one MTC UE on the N narrowbands. It can be seen that the eNB can also schedule the MTC UE to perform narrowband-bandwidth conversion in each selected narrowband, and if the MTC UE service requirements are met, the MTC UEs should be evenly distributed on each narrowband.
  • an embodiment of the present invention provides a device for supporting narrowband communication in a broadband system, including:
  • the first determining unit 21 is configured to determine, according to a service requirement of the at least one MTC UE, a quantity N of narrowbands used to support the at least one MTC UE communication.
  • the second determining unit 22 is configured to determine, according to the channel quality of the at least one MTC UE on the M initial narrowbands, the N narrowbands, the M1N1 from the M initial narrowbands.
  • the apparatus for supporting narrowband communication in a broadband system may be separately provided or integrated with a base station.
  • the base station is an eNB of an LTE system.
  • the maximum working bandwidth of the LTE system is 20M, and 20M is the maximum working bandwidth of the LTE system.
  • the working bandwidth of the MTC UE can be reduced, for example, to 1.4M, 3M or 5M, etc. 1. 4M, 3M or 5M refers to the maximum working bandwidth of the narrowband MTC UE.
  • the corresponding narrowband numbers may be allocated to the M initial narrowbands, for example, the narrowband number values are 0 to M-1, thereby determining N narrowbands from the M initial narrowbands.
  • N narrowband numbers corresponding to N narrow bands are determined, the positions of the N narrow bands can be determined.
  • the number of narrowbands is limited according to service requirements, and the position of the narrowband is limited according to the channel quality, and the multiple narrowbands are randomly divided from the broadband to minimize the splitting of the broadband;
  • the scheduling for the MTC UE is also more targeted, which facilitates the MTC UE to adjust the working band to receive information.
  • the apparatus for supporting narrowband communication in a broadband system may further include:
  • the dividing unit 31 is configured to divide the broadband used for communication into M initial narrow bands according to the bandwidth of the narrow band.
  • the obtaining unit 32 is configured to obtain, when the at least one MTC UE is one, the channel quality of each MTC UE on each of the initial narrowbands in the M initial narrowbands. Obtaining channel quality on each initial narrowband of the M initial narrowbands of each of the plurality of MTC UEs when acquiring the at least one MTC UE, and acquiring channel quality of each of the plurality of MTC UEs on each initial narrowband The weighted average is used as the channel quality of the MMC UEs on the M initial narrowbands.
  • the obtaining unit 32 may be specifically configured to:
  • the SRS transmitted by each MTC UE on the initial narrowband is received, and the signal quality of the SRS is obtained.
  • receive the DMRS that each MTC UE transmits along the initial narrowband with the data and obtain the signal quality of the DMRS.
  • the related technologies of the MTC UE transmitting the SRS DMRS and the CNB receiving the SRS or the DMRS may be referred to the prior art for understanding, and are not described herein.
  • the transmission bandwidth of the DMRS is a narrowband data transmission bandwidth, that is, the transmission bandwidth of the DMRS is the same as the narrowband data transmission bandwidth.
  • the obtaining unit 32 may be specifically configured to:
  • the CQI on each narrowband fed back by each MTC UE is received, and the signal quality of the downlink reference signal indicated by the CQI is obtained.
  • receiving a measurement result on each narrowband fed back by each MTC UE and acquiring a signal quality of the downlink reference signal indicated by the measurement result.
  • the second determining unit 22 is specifically configured to:
  • the narrowest bands with the highest channel quality are determined from the initial narrowband.
  • the initial narrowbands are arranged in descending order of the channel quality or the weighted average of the channel qualities, and the high-low values are determined as one narrow band.
  • the device supporting the narrowband communication in the broadband system in the embodiment of the present invention may further include:
  • a third determining unit 33 configured to determine, according to channel quality of the at least one MTC UE in the narrowband, a narrowband with the highest channel quality for the at least one MTC UE communication, and indicate that the at least one MTC UE is in channel quality The highest one is on narrowband communication.
  • the broadcast unit 34 is configured to broadcast the narrowband information to the at least one MTC UE, so that at least one MTC UE uses the narrowband selected for communication.
  • the method for broadcasting the information of the narrowband to the MTC UE may include:
  • the eNB broadcasts the first flag bit information to the MTC UE, where the M flag bits respectively correspond to the M initial narrow bands, and it is agreed that when the flag bit is 1, the flag bit corresponds to the initial narrow band as one of the N narrow bands. Or it is agreed that when the flag bit is 0, it indicates that the flag bit corresponds to one of the N narrow bands corresponding to the initial narrow band.
  • the device supporting the narrowband communication in the broadband system in the embodiment of the present invention may further include:
  • the storage unit 35 is configured to store a table that stores channel quality of each MTC UE in each initial narrowband (the initial narrowband corresponds to a narrowband number).
  • the eNB can also obtain a weighted average of the channel qualities of all MTC UEs on each initial narrowband through the table.
  • the device supporting the narrowband communication in the broadband system in the embodiment of the present invention may further include:
  • the timing unit 36 is configured to periodically determine, according to the service requirement of the at least one MTC UE, the number N of narrowbands used to support communication by the at least one MTC UE. And determining, according to the channel quality of the M initial narrowbands of the at least one MTC UE, N narrowbands from the M initial narrowbands.
  • the apparatus for supporting narrowband communication in a broadband system may further include- The adjusting unit 37, ffl, adjusts the number of at least one MTC UE on the N narrowbands according to the communication condition of the at least one MTC UE on the N narrowbands.
  • an embodiment of the present invention provides a method for supporting narrowband communication in a broadband system, including:
  • the receiving, by the base station, the information of the N narrowband, the N narrowband information is obtained by: the base station determining, according to the service requirement of the at least one MTC UE, Determining the number N of narrowband bands communicated by the at least one MTC UE, and determining the N narrowbands from the M initial narrowbands according to channel qualities of the at least one MTC UE on the M initial narrowbands.
  • the executor of the method for supporting narrowband communication in the broadband system in the embodiment of the present invention is an MTC UE, and the base station may be an eNB of the LTE system.
  • a method for supporting narrowband communication in a broadband system is adopted.
  • the maximum working bandwidth of the LTE system is 20M, and 20M is the maximum working bandwidth of the LTE system.
  • the bandwidth of the MTC UE can be reduced, for example, to 1.4M, 3M or 5M, etc. 1.
  • 4M, 3M or 5M refers to the maximum working bandwidth of the narrowband MTC UE.
  • the number of narrowbands divided according to service requirements is limited, and the position of the narrowband divided by the channel quality is limited, and the plurality of narrowbands are randomly selected from the broadband, and the broadband is minimized.
  • the splitting at the same time, also makes the scheduling for narrowband MTC UEs more targeted.
  • the M initial narrowbands may be determined by:
  • the MTC UE divides the broadband used for communication into M initial narrowbands according to the narrowband bandwidth.
  • the MTC UE may divide the eNB and the agreed initial narrowband, and the eNB and the MTC UE respectively divide according to a consistent division criterion.
  • the eNB determines an initial narrowband partitioning criterion and performs partitioning, and then broadcasts the initial narrowband partitioning condition to the MTC UE.
  • the corresponding narrowband numbers may be allocated to the M initial narrowbands, for example, the narrowband number values are 0 to M-1, thereby determining N narrowbands from the M initial narrowbands.
  • N narrowband numbers corresponding to N narrow bands are determined, the positions of the N narrow bands can be determined.
  • the method may further include:
  • the MTC UE transmits the SRS on each initial narrowband
  • the MTC UE sends the DMRS along with the data on each initial narrowband
  • the MTC UE feeds back the CQI on each initial narrowband, where the CQI indicates the signal quality of the downlink reference signal; or the MTC UE feeds back the measurement result on each initial narrowband, the measurement indicating the signal quality of the downlink reference signal.
  • the eNB sends a reference signal to each of the initial narrowbands to the MTC UE, and the CQI or measurement result on each initial narrowband fed back by the MTC UE.
  • the transmission bandwidth of the SRS is determined by the following methods:
  • the transmission bandwidth of the DMRS is a narrowband data transmission bandwidth.
  • the method for supporting the narrowband communication in the broadband system according to the embodiment of the present invention after determining the N narrowbands from the M initial narrowbands according to the broadcast message, may further include:
  • the eNB schedules narrowband communication of the MTC UE, and the MTC UE monitors paging, scheduling, or performs data transmission in the corresponding narrowband, and the eNB only pages and measures the corresponding narrowband to the MTC UE. Or carry out data transmission.
  • the data transmission method of the embodiment of the present invention may further include: after determining the N narrowbands from the M initial narrowbands according to the broadcast message,
  • the eNB After the eNB determines N narrowbands, the eNB does not schedule the narrowband of the MTC UE communication, but the NTC UE selects the narrowband of its communication. For example, the MTC UE selects the narrowband communication with better channel quality according to the channel quality on the N narrowbands. That is, the MTC UE monitors paging, scheduling, or performs data transmission in the corresponding narrowband, and the eNB also pages, schedules, or performs data transmission on the MTC UE only on the corresponding narrowband.
  • a narrowband is determined to initiate access from the N narrowbands.
  • the method for determining a narrow band from the N narrow bands includes: selecting a narrow band with the largest narrow band number from the N narrow bands, or narrowing the narrow band with the smallest narrow band from the N narrow bands, or selecting a narrow band of the center band from the N narrow bands .
  • a preferred mode is to select a narrow band of the center band from the N narrow bands.
  • a narrowband is selected from the N narrowbands to initiate the access, and then the MTC UE can perform SRS frequency hopping transmission on the initial narrowband of the cell, or send the DMRS along with the data, or feed back the CQI, or Feedback measurement results.
  • An embodiment of the present invention is an execution host MTC UE supporting a method for narrowband communication in a broadband system.
  • the embodiment of the present invention supports a narrowband in a broadband system.
  • the operation of the main body of the communication method can be understood by referring to the above-described embodiment. For the content that can be referred to, the details are not described herein.
  • a method for supporting narrowband communication in a broadband system corresponding to the above embodiment, an embodiment of the present invention provides an apparatus for supporting narrowband communication in a broadband system, including:
  • the first receiving unit 51 is configured to receive a broadcast message sent by the base station, where the broadcast message carries N narrowband information, where the N narrowband information is obtained by: the base station communicating user equipment MTC according to at least one machine type Determining, by the service requirement of the UE, the number N of narrowbands used to support the communication of the at least one MTC UE, determining the N from the M initial narrowbands according to channel qualities of the at least one MTC UE on the M initial narrowbands Narrow band.
  • the determining unit 52 is configured to determine, according to the broadcast message, the N narrowbands from the M initial narrowbands, where the M1N1.
  • the device supporting the narrowband communication in the broadband system in the embodiment of the present invention may be separately set or integrated with the MTC UE.
  • a device supporting narrowband communication in a broadband system may allocate a corresponding narrowband number for each initial narrowband. For example, when the narrowband number values are 0 to M1, when N narrow bands are determined from the M initial narrow 'bands, the narrow band numbers of the N narrow pairs are determined to be the positions of the N narrow bands.
  • the number of narrowbands divided according to the service requirement is limited, and the position of the narrowband divided by the channel quality is limited, and the plurality of narrowbands are randomly divided from the broadband, and the broadband is minimized. At the same time, it also makes the scheduling for narrow ⁇ MTC UE more targeted.
  • the apparatus for supporting narrowband communication in a broadband system may further include:
  • a sending unit 61 configured to send a sounding reference number SRS on each initial narrowband, or, in each initial narrowband I: transmit a demodulation reference signal DMRS along with the data, or feed back a CQI on each initial narrowband,
  • the CQI indicates the signal quality of the downlink reference signal, or feedbacks the measurement result on each initial narrowband, the measurement indicating the signal quality of the downlink reference signal.
  • the second receiving unit 62 is configured to receive the indication information sent by the base station, where the determining unit 52 is further configured to determine, according to the indication information, a narrowband for performing communication.
  • the access unit 63 is configured to determine, when the new MTC UE accesses the network, a narrowband to initiate access from the narrowband.
  • the apparatus for supporting the narrowband communication in the broadband system and the configuration thereof in the embodiment of the present invention may be corresponding to the execution of the method for supporting the narrowband communication in the broadband system according to the foregoing embodiment. For the content that can be referred to, the details are not described herein.
  • the MTC UE hops and transmits the SRS signal in the uplink frequency band.
  • the method for supporting the narrowband communication in the broadband system in the embodiment of the present invention includes:
  • the MTC UE determines an initial narrowband and then hops the SRS on the initial narrowband.
  • the transmission bandwidth of the SRS is determined by:
  • the eNB determines the number of narrowbands according to service requirements of at least one MTC UE in the cell.
  • e NB calculates the respective initial narrow band, weighted mean of all the MTC UE SRS signal quality, the mean maximum selection as soon N narrow-band communication with narrowband MTC-butoxy.
  • the eNB maintains a table, and saves the SRS signal quality of each MTC UE on each initial narrowband; thus, the eNB calculates each narrow Within the weighted average of the SRS signal quality of all MTC UEs, the N narrowbands with the largest weighted T-means are selected as the narrowband of the upcoming MTC communication.
  • the eNB broadcasts N narrowband information as supporting at least one MTC communication.
  • the broadcast mode of the eNB is in the form of a bitmap.
  • the above line bandwidth is 110 RB, and the narrow-band granularity is 6 RB.
  • the 18-bit bi-tmap value is required to indicate the narrow-band position information
  • the bitmap value is 1/0 indication
  • the corresponding narrow band is used to support the MTC.
  • the eNB indicates, according to the SRS signal quality of the MTC UE in the N narrowbands, that the at least one MTC UE performs uplink communication on a narrowband with the most SRS signal quality.
  • the eNB indicates that the at least one MTC UE performs uplink communication on the narrowest band of the SRS signal quality according to the SRS signal quality of the N narrowband in the at least one MTC UE. That is, for one MTC UE, the eNB tries to determine the narrowband with the best channel quality to allow the MTC UE to communicate.
  • the so-called communication means that the MTC UE monitors paging, scheduling or data transmission in the corresponding narrowband, and the eNB only pages, schedules or performs data transmission on the corresponding narrowband MTC UE.
  • the MTC UE performs uplink communication on the narrowband according to the indication of the eNB.
  • the MTC UE transmits its own PUCCH data on the corresponding narrow-band PUCCH (Physical Uplink Control CHannel) according to the indication of the eNB.
  • PUCCH Physical Uplink Control CHannel
  • the eNB may maintain a period, periodically update and broadcast the narrowband information according to the service requirement of the MTC UE in the cell, and the SRS signal quality fed back by each MTC UE; and during the period, the eNB may also schedule The MTC UE performs a communication narrowband transform in each of the narrowbands that have been selected.
  • the new MTC UE accesses the network, the new MTC UE first acquires the eNB broadcast N as a support for
  • the narrowband position of the MTC communication after which the new MTC UE randomly selects a narrowband from the N narrowbands to initiate uplink access, such as a preferred centerband narrowband. Then, the new MTC UE performs SRS frequency hopping transmission.
  • the MTC UE when the MTC UE has communication requirements, it skips back to the narrowband of its communication and performs communication; after the communication is completed, the MTC UE can return to the SRS frequency hopping position before the communication to continue the SRS frequency hopping transmission, and the MTC UE can also communicate from the communication.
  • the narrowband restarts SRS hopping transmission.
  • the storage medium may be a magnetic disk, an optical disk, a read only memory (C Read-Only Memory, ROM), or a random access memory (RAM).

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

Abstract

La présente invention concerne un procédé et un dispositif permettant de prendre en charge une communication à bande étroite dans un système à large bande. Le procédé permettant de prendre en charge une communication à bande étroite dans un système à large bande selon l'invention comprend les étapes consistant à : déterminer, en fonction d'une requête de service provenant d'au moins un équipement utilisateur à communication du type machine (MTC UE), le nombre N de bandes étroites permettant de prendre en charge la communication du ou des MTC UE ; et en fonction de la qualité de canal du ou des MTC UE sur M bandes étroites initiales, déterminer N bandes étroites à partir des M bandes étroites initiales, M≥1≥N≥1. Le procédé et le dispositif permettant de prendre en charge une communication à bande étroite dans un système à large bande proposés par les modes de réalisation de la présente invention limitent le nombre et les positions des bandes étroites en fonction de la requête de service, réduisent le plus possible la division de la bande large, et spécifient davantage la planification du MTC UE, ce qui est avantageux pour que le MTC UE ajuste une bande de fréquence de fonctionnement en vue de recevoir des informations.
PCT/CN2013/070173 2012-04-24 2013-01-07 Procédé et dispositif permettant de prendre en charge une communication à bande étroite dans un système à large bande WO2013159577A1 (fr)

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