Classifications

• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W48/00—Access restriction; Network selection; Access point selection
  • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
  • H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel

Definitions

• Embodiments of the present invention relate to the field of wireless communications, and more particularly, to a communication method, a base station, and a user equipment. Background technique
• the current Long Term Evolution (LTE) LTE version (Release) 8 system supports a maximum bandwidth of 20MHz, which is suitable for data throughput of user equipment (User Equipment, UE).
• the narrowband UE only has the ability to receive ' ⁇ , bandwidth, such as system bandwidth 1.4/3 /5MHz.
• the narrowband UE cannot access the system with a bandwidth of 20 MHz.
• the conventional scheme divides dedicated subbands for narrowband UEs.
• the bandwidth of these subbands does not exceed the reception capability of the narrowband UE.
• the narrowband UE receives downlink data on these subbands.
• the narrowband UE When initially accessing the network, the narrowband UE first receives a Physical Broadcasting Channel (PBCH) or an extended PBCH channel to obtain whether the cell supports narrowband UE access and each subband is in a physical downlink shared channel (Physical Downlmk Shared Channel). , referred to as PDSCH) Information on the location of the resource.
• PBCH Physical Broadcasting Channel
• PDSCH Physical Downlink shared channel
• the subband When the location of the dedicated subband changes, the subband may be indicated by the PBCH or the extended PBCH channel, or the UE may be paged and notified to receive the updated system.
• Information indicating the new position of the subband in the system message.
• a plurality of subbands are divided for the narrowband UE, and the narrowband UE is semi-statically resident on a certain subband to receive downlink data.
• the base station side needs to send public messages, such as paging messages, system messages, etc., on each sub-band. Especially for system messages, the content of system messages sent on multiple sub-bands is the same, but is sent multiple times, resulting in wasted resources and low efficiency. Summary of the invention
• the embodiment of the invention provides a communication method, which enables the narrowband UE to access the current LTE system, and avoids repeatedly sending public messages and saves system resources.
• a communication method comprising:
• the physical downlink shared channel PDSCH determines a common message subband and a data subband
• a communication method comprising:
• the physical downlink shared channel PDSCH determines a common message subband and a data subband
• a communication method comprising:
• a communication method comprising:
• a second DCI sent by the base station where the second DCI is used to indicate a location of a downlink data resource sent to the UE, where a location of the downlink data resource and a location of the dedicated search space Same in the bandwidth range of the UE;
• a base station including:
• a processing unit configured to determine a common message subband and a data subband in a physical downlink shared channel PDSCH; a sending unit, configured to send a common message to the user equipment UE in the common message subband, and also used in the data subband Sending downlink data to the UE.
• a user equipment where the user equipment includes:
• a processing unit configured to determine a common message subband and a data subband in the physical downlink shared channel PDSCH; a receiving unit, configured to receive, in the common message subband, a public message sent by the base station; the receiving unit is further configured to: The data subband receives downlink data sent by the base station.
• a base station in another aspect, includes:
• a processing unit configured to determine a common search space on the physical downlink shared channel PDSCH; a sending unit, in the common search space, send a first DCI for scheduling a system message, where the first DCI is used to indicate The location of the dedicated search space of the UE; The sending unit is further configured to send, in the dedicated search space, a second DCI for scheduling downlink data to the UE, where the second DCI is used to indicate a location of a downlink data resource that is sent to the UE; The sending unit is further configured to send downlink data to the UE at a location of the downlink data resource indicated by the second DCI.
• a user equipment in another aspect, includes: a processing unit, configured to determine a common search space on a physical downlink shared channel PDSCH; and a receiving unit, configured to receive, by the base station, in the common search space The first DCI of the scheduling system message, where the system message is used to indicate a location of a dedicated search space for the user equipment UE; the receiving unit is further configured to receive, in the dedicated search space, a second DCI sent by the base station, The second DCI is used to indicate a location of a downlink data resource that is sent to the UE, where a location of the downlink data resource and a location of the dedicated search space are within a bandwidth range of the UE; The location of the downlink data resource indicated by the second DCI, where the receiving unit is configured to receive downlink data sent by the base station.
• the common message and the data message can be sent to the narrow-band UE in different sub-bands respectively, thereby avoiding waste of resources caused by repeated sending of the common message, which is beneficial to improving resources. Utilization.
• FIG. 1 is a schematic flow chart of a communication method according to an embodiment of the present invention
• 2 is a schematic diagram of a location of a common message subband and a data subband determined according to an embodiment of the present invention
• FIG. 3 is a schematic flowchart of a communication method according to an embodiment of the present invention
• FIG. 4 is a schematic flow chart of a communication method according to an embodiment of the present invention.
• FIG. 5 is a schematic flow chart of a communication method according to an embodiment of the present invention.
• FIG. 6 is a schematic structural diagram of a base station according to an embodiment of the present invention.
• Figure ⁇ is a schematic structural diagram of a user equipment according to an embodiment of the present invention.
• FIG. 8 is a schematic structural diagram of a base station according to an embodiment of the present invention.
• FIG. 9 is a schematic structural diagram of a user equipment according to an embodiment of the present invention. detailed description
• method 100 includes:
• sharing a channel in the physical downlink PDSCH determines a common message subband and a data subband
• a common message subband, a data subband 1 and a data subband 2 can be determined on the PDSCH.
• the common message subband here is used to send a common message to the narrowband UE, and the data subband can be used.
• the downlink data is sent to the narrowband UE.
• the public message described herein refers to, for example, a public message sent by a base station to a user equipment for all UEs or a group of UEs in a cell.
• the public message referred to herein includes a paging message, a System Information Block (SIB), a random access response message, and the like.
• SIB System Information Block
• the location of the common message subband on the PDSCH may be fixed, for example, the base station indicates to the UE the location of the common message subband on the PDSCH through the PBCH or the extended PBCH channel.
• the method of the embodiment of the present invention specifically includes: sending a physical broadcast channel PBCH or an extended PBCH to the UE, indicating the common message sub-in the PBCH or the extended PBCH.
• the position in the PDSCH may be determined by frequency hopping according to a preset frequency hopping mode.
• the step 110 specifically includes: determining, according to a preset first frequency hopping mode, a location of the common message subband in the PDSCH.
• the number of data subbands is related to the number of narrowband UEs that the cell accommodates.
• the number of data subbands can be set as needed. For example, several narrowband UEs share one data subband to improve resource utilization. In special cases, a dedicated data subband can even be set for a particular narrowband UE to meet the needs of a particular application scenario.
• the location of the data subband on the PDSCH may be fixed or semi-statically changed, for example, by the system message or higher layer signaling to inform the UE of the location of the data subband on the PDSCH.
• the step 120 specifically includes: sending, by the common message sub-band, an SIB or a radio resource control (Radio Resource Control), where the SIB or the upper layer RRC signaling is sent to the UE.
• Information carrying a location indicating the data subband in the PDSCH is carried.
• the position of the data subband on the PDSCH may also be determined by frequency hopping according to a preset frequency hopping mode.
• the step 110 specifically includes: determining a location of the data subband in the PDSCH according to a preset second frequency hopping mode.
• the frequency hopping mode adopted in the embodiment of the present invention is, for example:
• c N csl ⁇
• mod represents the modulo operation
• ⁇ represents the subframe number
• the position of the data subband in the first subframe is calculated by the subframe number.
• e (') is a pseudo-random sequence function
• e « is the initialization value of the random sequence function.
• N m In the FDD (Frequency Division Duplexing) system, N m; in the TDD (Time Division Duplexing) system, "2 2 ⁇ 111 ⁇ 4 ) - 1 " ⁇ 1 ; M is The number of possible locations of the common message subband over the entire system bandwidth. The possible locations of each common message subband are fixed.
• the base station can send the same paging message to the wideband UE and the narrowband UE.
• the difference is that the paging message sent to the broadband UE can be sent in the traditional manner, or can be sent on the common message sub-band, and the paging message sent to the narrowband UE can only be on the public message sub-band. send.
• the paging message sent to the narrowband UE may be different from the paging message sent to the broadband UE.
• the base station can send the same RAR message to the broadband UE and the narrowband UE.
• the RAR message sent to the broadband UE can be sent in the traditional manner or on the common message sub-band, and the RAR message sent to the narrowband UE can only be sent on the common message sub-band.
• the RAR message sent to the narrowband UE may be different from the RAR message sent to the broadband UE.
• the base station may identify a narrowband UE on a preamble or a Physical Random Access Channel (PRAH) resource, and send a RAR only for the narrowband UE on the common message subband.
• PRAH Physical Random Access Channel
• message 4 of the random access procedure that is, a random access conflict resolution (Contention Resolution) message.
• the base station can transmit the same SIB to the wideband UE and the narrowband UE.
• the difference is that the SIB sent to the broadband UE can be sent in the traditional manner or on the public message sub-band, and the SIB sent to the narrowband UE can only be sent on the common message sub-band.
• the SIB transmitted to the narrowband UE may be different from the SIB transmitted to the broadband UE.
• the narrowband UE for a narrowband UE that initially accesses the network and a narrowband UE that is in an idle state, it is only necessary to receive a message on a common message subband.
• the common message subband is in the extended control channel E-PDCCH
• the narrowband UE in the idle state can listen to the paging in the common search space of the E-PDCCH according to paging DRX (Discontinuous Reception).
• - Paging-Radio Network Temporary Identifier (RNTI) plus Downlink Control Information (DCI) and monitors SIB1 scrambled by SI-RNTI in subframe 5, and Other SIB messages are received on the corresponding subframe according to the period defined in SIB1.
• the narrowband UE initially accessing the network first receives the system message and the RAR on the common message subband.
• the base station may send a paging message to the narrowband UE on the data subband to indicate system message update.
• a paging message is referred to as a second paging message.
• the base station sends a narrowband UE to the UE during a system message modification period After the second paging message is sent, the narrowband UE of the connected state is not scheduled in the next system message modification period to ensure that the narrowband UE receives the updated SIB from the common message subband.
• the payload of the public message may exceed the receiving capability of the narrowband UE.
• a capacity of a transport block (TB) for carrying a common message may be determined according to a bandwidth of the UE, and a public message is sent to the user equipment UE in the common message sub-band based on the capacity, for example
• the TB capacity of the new category (Category) is defined for the narrowband UE, and the restricted common message can be received by the narrowband UE.
• the capacity of the transport block TB refers to the maximum number of bits transmitted by the upper layer to the physical layer, and the maximum number of bits is determined by the size of the physical layer resource.
• the bandwidth of the UE determines the ability of the maximum number of bits that the UE can handle.
• the transmission of the public message is to ensure that the UE has the capability to process, so the transmission of the common message is determined according to the processing capability of the UE, and the size of the transport block of the public message transmitted by the high layer to the physical layer (ie, the number of bits of the transport block TB).
• Such a scheme facilitates the relatively small reception capability of compatible narrowband UEs.
• the common message segment may also be sent within the common message subband and sent in consecutive subframes.
• the step 120 may include: transmitting, in the common message sub-band, a DCI to the UE, where the DCI includes segment indication information and a message segment carrying the common message, where the segment indication information A subframe indicating that there are other message segments carrying a common message after the current subframe.
• a bit in the DCI is used as the segmentation indication information. When the value of the bit is 0, it indicates a message segment of the common message that is not segmentally transmitted after the subframe.
• FIG. 3 is a schematic flow diagram of a method 300 in accordance with an embodiment of the present invention. As shown in FIG. 3, method 300 includes:
• the method may include: receiving a PBCH or an extended PBCH sent by the base station, indicating, in the PBCH or the extended PBCH, the common message subband in the PDSCH. s position.
• the step 310 may include: determining a location of the common message subband in the PDSCH according to a preset first frequency hopping mode.
• the step 320 may include: receiving the SIB or the high layer RRC signaling sent by the base station in the common message subband, where the SIB or the high layer RRC signaling carries the indication that the data subband is in the Information about the location in the PDSCH.
• the step 310 may include: determining a location of the data subband in the PDSCH according to a preset second frequency hopping mode.
• the method 300 may further include:
• the step 320 further includes: determining, according to a bandwidth of the user equipment UE, a capacity of the transport block TB for carrying the common message, and receiving, according to the capacity, the public message sent by the base station in the common message subband. ,.
• step 320 further includes: receiving the public message segment according to a bandwidth of the user equipment UE.
• the public message segment is received in the common message sub-band according to the bandwidth of the user equipment UE, specifically:
• the common message and the data message can be sent to the narrowband UE in different subbands respectively, which avoids waste of resources caused by repeated sending of the public message, and is beneficial to improving resource utilization.
• a communication method 400 includes:
• the common search space may be set to a preset position on the PDSCH, or the location of the common search space may be determined on the PDSCH by using a preset frequency hopping manner.
• the base station may send a public message such as a paging message, a random access response message, or a message 4 of a random access procedure to the UE.
• the location of the dedicated search space and the location of the downlink data resource may be in the bandwidth range of the narrowband UE by using scheduling indication information in the first DCI and the second DCI. Therefore, the narrowband UE can acquire downlink control information and data resources in its frequency band.
• the method 500 of the embodiment of the present invention includes:
• the second DCI sent by the base station is received in the dedicated search space, where the second DCI is used to indicate a location of a downlink data resource that is sent to the UE.
• the common search space may be set to a preset position on the E-PDCCH, or the location of the common search space may be determined on the E-PDCCH by using a preset frequency hopping manner.
• the UE in the common search space, may receive a public message such as a paging message, a random access response message, or a message 4 of a random access procedure sent by the base station.
• the location of the dedicated search space and the downlink data resource may be indicated by scheduling indication information in the first DCI and the second DCI.
• the location is within the bandwidth of the narrowband UE such that the narrowband UE can acquire downlink control information and data resources within its frequency band.
• a base station 600 includes:
• the processing unit 610 is configured to determine a common message subband and a data subband in the physical downlink shared channel PDSCH;
• the sending unit 620 is configured to send a public message to the user equipment UE in the common message subband, and to send downlink data to the UE in the data subband.
• the sending unit 620 is configured to send a physical broadcast channel PBCH or an extended PBCH to the UE, and indicate the common message subband in the PDSCH in the PBCH or the extended PBCH. s position.
• the processing unit 610 is configured to determine a location of the common message subband in the PDSCH according to a preset first frequency hopping mode.
• the public message is at least one of the following messages: a paging message pagmg, a random access response message RA, a random access procedure message 4, and a system message block SIB.
• the sending unit 620 is configured to send, by using the common message sub-band, SIB or high-layer RRC signaling to the UE, where the SIB or the high-layer RRC signaling carries the indication that the data sub-band is in the Information about the location in the PDSCH.
• the processing unit 610 is configured to determine a location of the data subband in the PDSCH according to a preset second frequency hopping mode.
• the sending unit 620 is configured to send a second paging message to the UE in the data subband, where the second paging message is used to indicate a system message update.
• the sending unit 620 is further configured to send the updated system message to the UE in the common message subband.
• the processing unit 61 is configured to determine, according to a bandwidth of the UE, a capacity of a transport block TB for carrying the common message, and the sending unit 620 is configured to use the capacity according to the capacity.
• the common message subband sends a public message to the user equipment UE.
• the sending unit 620 is configured to send the public message segment according to the bandwidth of the UE.
• the sending unit 620 is configured to send a DCI to the UE in the common message sub-band, where the DCI includes segment indication information and a message segment of the common message, where the segment indication The information is used to indicate a message segment of the public message after the current DCI.
• the user equipment 700 includes:
• the processing unit 710 is configured to determine a common message subband and a data subband in the physical downlink shared channel PDSCH;
• the receiving unit 720 is configured to receive, in the common message subband, a public message sent by the base station, where the receiving unit 720 is further configured to receive the downlink data sent by the base station in the data subband.
• the receiving unit 720 is further configured to receive a PBCH or an extended PBCH sent by the base station, and indicate, in the PBCH or the extended PBCH, the common message subband in the PDSCH. position.
• the processing unit 710 is configured to determine a location of the common message subband in the PDSCH according to a preset first frequency hopping mode.
• the receiving unit 720 is configured to receive the SIB or the high layer RRC signaling sent by the base station in the common message subband, where the SIB or the upper layer RRC signaling carries the data subband in the Information about the location in the PDSCH.
• the processing unit 710 is configured to determine a location of the data subband in the PDSCH according to a preset second frequency hopping mode.
• the receiving unit 720 is configured to receive, by the data subband, a second paging message sent by the base station, where the second paging message is used to indicate a system message update; 720 is further configured to receive, in the common message subband, an updated system message sent by the base station.
• the processing unit 710 is configured to determine, according to a bandwidth of the user equipment UE, a capacity of a transport block TB for carrying the common message, and the receiving unit 720 is configured to be in the public based on the capacity.
• the message subband receives the public message sent by the base station.
• the receiving unit 720 is configured to receive the public message segment according to the bandwidth of the user equipment UE.
• the receiving unit 720 is configured to receive, by using the common message sub-band, the base station to send a DCI, where the DCI includes segment indication information and a message segment of the common message, where the segment indication The information is used to indicate a message segment of the public message after the current DCI.
• Another aspect of an embodiment of the present invention is directed to another base station and user equipment for implementing the method of another aspect of an embodiment of the present invention.
• a base station 800 includes:
• the processing unit 810 is configured to determine a common search space on the PDSCH;
• the sending unit 820 in the common search space, sends a first DCI for scheduling a system message, where the system message is used to indicate a location of a dedicated search space for the UE;
• the sending unit 820 is further configured to send, in the dedicated search space, a second DCI for scheduling downlink data to the UE, where the second DCI is used to indicate a location of a downlink data resource that is sent to the UE;
• the sending unit 820 is further configured to send downlink data to the UE at a location of the downlink data resource indicated by the second DCI.
• the processing unit 810 is configured to set the common search space to a preset position on the PDSCH.
• the processing unit 810 is configured to determine the common search space on the PDSCH by using a preset frequency hopping mode.
• the sending unit 820 is further configured to: send, in the common search space, a paging message, a random access response message RAR, or a random access procedure message 4.
• a user equipment 900 includes:
• the processing unit 910 is configured to determine a common search space on the PDSCH;
• the receiving unit 920 is configured to receive, in the common search space, a first DCI that is used by the base station to send a system message, where the system message is used to indicate a location of a dedicated search space for the user equipment UE;
• the receiving unit 920 is further configured to receive, in the dedicated search space, a second DCI sent by a base station, where the second DCI is used to indicate a location of a downlink data resource sent to the UE, where a location of the downlink data resource
• the receiving unit 920 is configured to receive the downlink data sent by the base station, where the location of the downlink data resource indicated by the second DCI is the same as the location of the dedicated search space.
• the processing unit 910 is configured to set the common search space to a preset location on the PDSCH. According to an embodiment of the invention, the processing unit 910 is configured to determine the common search space on the PDSCH by using a preset frequency hopping mode.
• the receiving unit 920 is further configured to receive, in the common search space, the paging message paging, the random access response message RAR, or the random access procedure message 4 sent by the base station.
• the disclosed systems, devices, and methods may be implemented in other ways.
• the device embodiments described above are merely illustrative.
• the division of the unit is only a logical function division.
• there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not executed.
• the 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 electrical, mechanical or otherwise.
• each functional unit in each embodiment of the present invention 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 functions may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product.
• the technical solution of the present invention which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including The instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention.
• the foregoing storage medium includes: a U disk, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like, which can store program codes. .

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• Engineering & Computer Science (AREA)
• Computer Security & Cryptography (AREA)
• Computer Networks & Wireless Communication (AREA)
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• Mobile Radio Communication Systems (AREA)

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• 2012
  • 2012-05-28 CN CN201210169144.0A patent/CN103458509B/zh not_active Expired - Fee Related
• 2013
  • 2013-03-04 WO PCT/CN2013/072108 patent/WO2013177964A1/fr not_active Ceased

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