WO2013091578A1 - 通信方法、基站和用户设备 - Google Patents

通信方法、基站和用户设备 Download PDF

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Publication number
WO2013091578A1
WO2013091578A1 PCT/CN2012/087214 CN2012087214W WO2013091578A1 WO 2013091578 A1 WO2013091578 A1 WO 2013091578A1 CN 2012087214 W CN2012087214 W CN 2012087214W WO 2013091578 A1 WO2013091578 A1 WO 2013091578A1
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WO
WIPO (PCT)
Prior art keywords
pdcch
information
pdsch
nack
subframe
Prior art date
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PCT/CN2012/087214
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English (en)
French (fr)
Inventor
官磊
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP12859291.2A priority Critical patent/EP2785131B1/en
Publication of WO2013091578A1 publication Critical patent/WO2013091578A1/zh
Priority to US14/311,121 priority patent/US9319199B2/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0055Physical resource allocation for ACK/NACK
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/12Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829Arrangements specially adapted for the receiver end
    • H04L1/1861Physical mapping arrangements
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/20Control channels or signalling for resource management
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/20Control channels or signalling for resource management
    • H04W72/23Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/12Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867Arrangements specially adapted for the transmitter end
    • H04L1/1896ARQ related signaling

Definitions

  • the minimum time interval for the user equipment (UE, User Equipment) of the e B is one subframe.
  • the physical downlink control channel (PDCCH, Physical Downlink Control Channel PDCCH may be a downlink scheduling grant (DL_grant, Downlink grant) or an uplink scheduling grant (UL_grant,) may be included in the subframe.
  • Uplink_grant The DL_grant or the UL_grant sent by the e B carries the scheduling information indicating the Physical Downlink Shared Channel (PDSCH) or the Physical Uplink Shared Channel (PUSCH).
  • PDSCH Physical Downlink Shared Channel
  • PUSCH Physical Uplink Shared Channel
  • the PUSCH and the PDSCH can be understood. It is an uplink and downlink data channel.
  • one PDCCH can only schedule PDSCH data of one subframe. Specifically, the PDCCH is in the same subframe as its scheduled PDSCH.
  • the UE feeds back the uplink ACK/NACK (Acknowledgement/Non-Acknowledgement) information corresponding to the PDSCH in the fourth subframe after the subframe.
  • the UE feeds back the uplink ACK/NACK information corresponding to the PDSCH at least after the fourth subframe or after the subframe.
  • the uplink ACK/NACK information may also be referred to as uplink feedback information.
  • the specific timing of the feedback is pre-configured, and the channel resource of the ACK/NACK corresponds to the label of the Control Channel Element (CCE) occupied by the PDCCH.
  • CCE Control Channel Element
  • the eNB subsequently uses the PDCCH to schedule retransmission packets for the UE.
  • the PDCCH carries a new data indicator (NDI, New Data Indicator) information occupying one bit to indicate whether the currently scheduled data packet is a new packet or an old packet. Specifically, if the DI bit is inconsistent with the previous DI value, the description is a new packet; if it is consistent, it is an old packet.
  • the PDCCH also carries a Redundancy version number (RV) that occupies two bits and indicates four different versions.
  • RV Redundancy version number
  • multi-subframe scheduling of the PDCCH is introduced, that is, one PDCCH can schedule PDSCH of multiple subframes.
  • multiple PDSCHs scheduled by one PDCCH need to perform corresponding ACK/NACK feedback, and the current method of determining channel resources of ACK/NACK feedback is no longer applicable.
  • the embodiments of the present invention provide a communication method, a base station, and a user equipment, which are capable of determining channel resources of ACK/NACK feedback corresponding to multiple PDSCHs.
  • a communication method including: transmitting a physical downlink control channel PDCCH to a user equipment in a subframe, where the PDCCH is used to schedule transmission of a physical downlink shared channel PDSCH of at least two subframes of the user equipment, and the PDCCH carries First indication information, the first indication information indicates a channel resource for transmitting an uplink acknowledgement/non-acknowledgement ACK/NACK information corresponding to the PDSCH; and determining a transmission subframe carrying the uplink ACK/NACK information corresponding to the PDSCH, in the transmission subframe The uplink channel ACK/NACK information is received on the channel resource.
  • a communication method including: receiving, in one subframe, a physical downlink control channel PDCCH sent by a base station, where the PDCCH is used for scheduling transmission of a physical downlink shared channel PDSCH of at least two subframes of a user equipment, and a PDCCH Carrying the first indication information, the first indication information indicating a channel resource for transmitting uplink acknowledgement/non-acknowledgment ACK/NACK information corresponding to the PDSCH; determining a transmission subframe carrying the uplink ACK/NACK information corresponding to the PDSCH, in the transmission subframe The uplink ACK/NACK information is sent on the channel resource.
  • a base station including: a channel sending unit, configured to send a physical downlink control channel PDCCH to a user equipment in one subframe, where the PDCCH is used to schedule a physical downlink shared channel PDSCH of at least two subframes of the user equipment.
  • the PDCCH carries the first indication information, the first indication information indicates a channel resource for transmitting the uplink acknowledgement/non-acknowledgement ACK/NACK information corresponding to the PDSCH, and the information receiving unit is configured to determine the uplink ACK corresponding to the PDSCH.
  • the transmission subframe of the NACK information receives uplink ACK/NACK information on the channel resource in the transmission subframe.
  • a user equipment including: a channel receiving unit, configured to receive, in one subframe, a physical downlink control channel PDCCH sent by a base station, where the PDCCH is used to schedule a physical downlink shared channel of at least two subframes of the user equipment.
  • Transmission of the PDSCH, and the PDCCH carries the first indication information
  • the first indication information indicates a channel resource for transmitting the uplink acknowledgement/non-acknowledgement ACK/NACK information corresponding to the PDSCH
  • the information sending unit is configured to determine the uplink ACK corresponding to the PDSCH
  • the transmission subframe of the /NACK information transmits uplink ACK/NACK information on the channel resource in the transmission subframe.
  • the PDCCH when the PDCCH schedules multiple PDSCHs, the PDCCH carries the indication information to indicate the channel resources of the ACK/NACK feedback corresponding to the scheduled PDSCH, so that the channel resources of the ACK/NACK feedback corresponding to the multiple PDSCHs can be determined.
  • FIG. 1 is a schematic diagram of an example of a PDSCH in which a PDCCH schedules a plurality of subframes.
  • FIG. 2 is a flow chart of a communication method in accordance with an embodiment of the present invention.
  • FIG. 3 is a flow chart of a communication method according to another embodiment of the present invention.
  • FIG. 4 is a schematic diagram of an example of scheduling a PDSCH of a plurality of subframes by a PDCCH according to an embodiment of the present invention.
  • Figure 5 is a block diagram of a base station in accordance with one embodiment of the present invention.
  • Figure 6 is a block diagram of a user equipment in accordance with one embodiment of the present invention.
  • FIG. 7 is a schematic diagram of an example of a PDSCH of a DL_grant scheduling downlink subframe according to an embodiment of the present invention.
  • Figure 8 is a block diagram of a base station in accordance with another embodiment of the present invention.
  • FIG. 9 is a block diagram of a user equipment according to another embodiment of the present invention.
  • the technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are a part of the embodiments of the present invention, but not all embodiments. . All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.
  • GSM global system for mobile communications
  • CDMA code division multiple access
  • Code Division Multiple Access system Wideband Code Division Multiple Access (WCDMA), General Packet Radio Service (GPRS), Long Term Evolution (LTE), etc.
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • UE User Equipment
  • RAN Radio Access Network
  • the heart network communicates, and the user equipment can be a mobile terminal, such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal, for example, can be portable, pocket, handheld, computer built, or in-vehicle mobile Devices that exchange language and/or data with the radio access network.
  • the base station may be a base station (BTS, Base Transceiver Station) in GSM or CDMA, or a base station (NodeB) in WCDMA, or an evolved base station (e B or e-NodeB, evolved Node B) in LTE.
  • BTS Base Transceiver Station
  • NodeB base station
  • e B or e-NodeB, evolved Node B evolved Node B
  • one PDCCH schedules a PDSCH of a plurality of subframes
  • Fig. 1 is a schematic diagram showing an example of a PDSCH in which a PDCCH schedules a plurality of subframes.
  • the base station schedules two PDSCHs (PDSCH1 and PDSCH2) of subframe 0 and subframe 1 with PDCCH1; in subframe 1, the base station schedules PDSCH0 of subframe 1 with PDCCH0.
  • ACK/NACK it is known that ACK/NACK (AN1) corresponding to PDSCH1 is fed back in subframe 4, and ACK/NACK (ANO and AN2) corresponding to PDSCH2 and PDSCH0 are fed back in subframe 5.
  • FIG. 2 is a flow chart of a communication method in accordance with an embodiment of the present invention. The method of Figure 2 is performed by a base station.
  • the PDCCH is used to schedule transmission of a PDSCH of at least two subframes of the user equipment, and the PDCCH carries the first indication information.
  • the first indication information indicates a channel resource for transmitting uplink ACK/NACK information corresponding to the PDSCH.
  • the PDSCH may adopt a pre-configured redundancy version (RV, Redundant Version).
  • the PDCCH may be used to schedule transmission of the initial transmission PDSCH of at least two subframes of the user equipment. Each subframe corresponds to at least one initial transmission PDSCH.
  • the pre-configured RV used in the initial transmission of the PDSCH may be pre-defined, that is, the base station and the user equipment do not need to interact; or the pre-configured RV used by the initial transmission PDSCH may also be determined by the base station, and then the base station notifies the user equipment of the pre-configuration.
  • the RV for example, may notify the user equipment of the pre-configured RV through RRC (Radio Resource Control) signaling.
  • RRC Radio Resource Control
  • the PDCCH may carry SIF (Subframe Indicator Field) information, where the SIF information is used to indicate the at least two subframes that are scheduled, so that the user equipment may perform the SIF according to the PDCCH.
  • the information determines which subframes on the subframe the PDCCH is scheduled to transmit.
  • the PDCCH may carry the SIF information and the DI (New Data Indicator) information, and the SIF information and the DI information are used to jointly indicate the at least two subframes that are scheduled, so that the user equipment may perform the SIF information and the DI according to the PDCCH. It is comprehensively determined which subframes on which the PDCCH is scheduled to transmit the initial PDSCH.
  • DI New Data Indicator
  • the first indication information of the channel resource of the uplink ACK/NACK information corresponding to the PDSCH of the PDCCH in the same subframe may be a CCE (Control Channel Element,) of the PDCCH. a control channel unit) label; the first indication information of the channel resource of the uplink ACK/NACK information corresponding to the PDSCH that is not in the same subframe as the PDCCH may be an ARI (ACK/NACK Resource Indicator, ACK/NACK resource indication in the PDCCH) ).
  • the first indication information of the channel resource of the uplink ACK/NACK information corresponding to the PDSCH may be an ARI in the PDCCH.
  • the foregoing ARI may be a specific bit or a scrambling code in the PDCCH.
  • the specific bit can be
  • the embodiment of the present invention does not limit the manner of determining the transmission subframe.
  • any existing determination manner may be adopted.
  • other methods may be used.
  • uplink feedback information of all scheduled PDSCHs may be fed back to the base station in a fixed transmission subframe.
  • the uplink feedback information may be received on a corresponding channel resource on the transmission subframe (i.e., the channel resource indicated by the first indication information in step 201).
  • the PDCCH when the PDCCH schedules multiple PDSCHs, the PDCCH carries the indication information to indicate the channel resources of the ACK/NACK feedback corresponding to the scheduled PDSCH, so that the ACK/NACK feedback channel corresponding to multiple PDSCHs can be determined. Resources.
  • the PDCCH/NACK resource indication may be used in the embodiment of the present invention.
  • the field indicates the channel resource of the ACK/NACK feedback corresponding to the scheduled PDSCH, and may also introduce a subframe indication field to specifically distinguish the number of scheduled subframes, such that the redundancy version field and/or the new data indication field may be used as an ACK. /NACK resource indication, improved scheduling flexibility.
  • the PDCCH may also be used to schedule transmission of the retransmission PDSCH of one or more subframes of the user equipment.
  • the PDCCH may carry second indication information for transmitting channel resources of the uplink ACK/NACK information corresponding to the retransmission PDSCH.
  • the second indication information may be a CCE label or an ARI of the PDCCH, or reuse the first indication information.
  • the PDCCH may carry the DI information, where the PDCCH may be used to indicate the one or more subframes that are scheduled to be retransmitted, that is, the subframes that need to retransmit the PDSCH, so that the user equipment may be according to the PDCCH.
  • the carried DI information determines which subframes on the PDCCH are scheduled to retransmit the PDSCH.
  • the PDCCH may carry the SIF information and the DI information, where the SIF information and the DI information are used to jointly indicate the one or more subframes that are scheduled, so that the user equipment may determine, according to the SIF information and the NDI information carried in the PDCCH, that the PDCCH scheduling is Which subframes are retransmitted PDSCH.
  • FIG. 3 is a flow chart of a communication method according to another embodiment of the present invention.
  • the method of Fig. 3 is executed by the user equipment and corresponds to the method of Fig. 2, and thus the repeated description will be appropriately omitted.
  • the PDCCH is used to schedule transmission of PDSCH of at least two subframes of the user equipment.
  • the PDCCH carries first indication information, and the first indication information indicates a channel resource for transmitting uplink ACK/NACK information corresponding to the PDSCH.
  • the PDSCH may employ a pre-configured RV.
  • the PDCCH may be used to schedule transmission of the initial transmission PDSCH of at least two subframes of the user equipment. Each subframe corresponds to at least one initial transmission PDSCH.
  • the pre-configured RV used in the initial transmission of the PDSCH may be pre-defined, that is, the base station and the user equipment do not need to interact; or the pre-configured RV used by the initial transmission PDSCH may also be determined by the base station, and then the user equipment receives the base station for pre-configuration.
  • the base station may notify the user equipment of the pre-configured RV through RRC (Radio Resource Control) signaling.
  • RRC Radio Resource Control
  • the PDCCH may carry SIF information, where the SIF information is used to indicate the at least two subframes that are scheduled, so that the user equipment may determine which subframes the PDCCH schedules according to the SIF information carried by the PDCCH.
  • the PDCCH may carry the SIF information and the NDI information, where the SIF information and the DI information are used to jointly indicate the at least two subframes that are scheduled, so that the user equipment may determine, according to the SIF information and the NDI carried by the PDCCH, which subframes are scheduled by the PDCCH.
  • the initial PDSCH on the frame.
  • the first indication information of the channel resource of the uplink ACK/NACK information corresponding to the PDSCH of the PDCCH in the same subframe may be a CCE label of the PDCCH;
  • the first indication information of the channel resource of the uplink ACK/NACK information corresponding to the PDSCH on the same subframe may be an ARI in the PDCCH.
  • the first indication information of the channel resource of the uplink ACK/NACK information corresponding to the PDSCH may be an ARI in the PDCCH.
  • the foregoing ARI may be a specific bit or a scrambling code in the PDCCH.
  • the particular bit may be all or part of the bits in the RV, and/or one bit of the NDI, and/or all or part of the bits in the DAI.
  • indicating the first indication information will be described in detail below with reference to specific embodiments.
  • 302. Determine a transmission subframe that carries uplink ACK/NACK information corresponding to the PDSCH, and send uplink ACK/NACK information on the channel resource in the transmission subframe.
  • the embodiment of the present invention does not limit the manner of determining the transmission subframe.
  • any existing determination manner may be adopted.
  • other methods may be used.
  • uplink feedback information of all scheduled PDSCHs may be fed back to the base station in a fixed transmission subframe.
  • the uplink feedback information may be transmitted on a corresponding channel resource on the transmission subframe (i.e., the channel resource indicated by the first indication information in step 301).
  • the PDCCH when the PDCCH schedules multiple PDSCHs, the PDCCH carries the indication information to indicate the channel resources of the ACK/NACK feedback corresponding to the scheduled PDSCH, so that the ACK/NACK feedback channel corresponding to multiple PDSCHs can be determined. Resources.
  • the PDCCH may also be used to schedule transmission of the retransmission PDSCH of one or more subframes of the user equipment.
  • the PDCCH may carry second indication information for transmitting channel resources of the uplink ACK/NACK information corresponding to the retransmission PDSCH.
  • the second indication information may be a CCE label or an ARI of the PDCCH, or reuse the first indication information.
  • the PDCCH may carry the DI information, where the PDCCH may be used to indicate the one or more subframes that are scheduled to be retransmitted, that is, the subframes that need to retransmit the PDSCH, so that the user equipment may be according to the PDCCH.
  • the carried NDI information determines which subframes on the PDCCH are scheduled to retransmit the PDSCH.
  • the PDCCH may carry the SIF information and the DI information, and the SIF information and the DI information are used to jointly indicate the one or more subframes that are scheduled, so that the user equipment may perform the SIF information and the NDI information comprehensively carried according to the PDCCH. It is determined in which subframes the PDCCH schedules the retransmission PDSCH.
  • the manner in which the subframes are scheduled will be described in detail below in conjunction with specific embodiments.
  • the ARI reuses 2 bits of the existing RV in the PDCCH.
  • the embodiment of the present invention may adopt other forms of ARL, for example, may be in the form of scrambling code, or use newly added bits, or use bits of other information elements (such as NDI, DAI), or only use some bits in the RV (for example, The previous bit or the next bit), or a combination of the above various methods. These modifications are all within the scope of the invention.
  • Embodiment 1 is numbered. However, this is not intended to limit the embodiments of the invention. For example, some elements between different numbered embodiments may also be used in combination, and are not limited to the particular implementation of the embodiment in which the elements are. Such combined use also falls within the scope of the invention.
  • Embodiment 1 is numbered. However, this is not intended to limit the embodiments of the invention. For example, some elements between different numbered embodiments may also be used in combination, and are not limited to the particular implementation of the embodiment in which the elements are. Such combined use also falls within the scope of the invention.
  • the multi-subframe scheduling can only be the initial transmission, and the retransmission packet only supports the single subframe scheduling, and the initial transmission of the multi-subframe scheduling is determined by the SIF, and the retransmission is determined by the SIF and the NDI.
  • the base station sends a PDCCH to the UE in the subframe n, and the PDCCH schedules the PDSCH initial transmission packet of the N subframes of the UE.
  • N may be specifically 1, 2, 3 or 4, but the value of N does not limit the scope of the invention.
  • a SIF of two bits may be added to the PDCCH to indicate, specifically, when the SIF is '00, '01, '10' '11 ', respectively, the schedule is ⁇ n ⁇ , ⁇ n, n+l ⁇ , ⁇ n, n+1 , n+2 ⁇ , ⁇ n, n+1 , n+2, n+3 ⁇ PDSCH of the subframe, that is, SIF not equal to '00' at this time indicates that multiple subframes are scheduled.
  • the TDD system is described separately:
  • the ACK/NACK channel resource corresponding to the PDSCH in the subframe in which the PDCCH is located corresponds to the CCE label of the PDCCH, that is, the ACK/NACK channel resource corresponding to the PDSCH of the subframe n is implicitly corresponding according to the CCE label of the PDCCH.
  • the PDCCH is transmitted in the PDSCH region by means of precoding, it may also be determined by the RB or RB pair of the PDCCH or the label of the antenna port; the ACK corresponding to the PDSCH on the subframe where the PDCCH is located
  • the NACK channel resource is notified by the ARI in the PDCCH, that is, the ACK/NACK channel resources respectively corresponding to the subframes n+1 and n+2 are displayed by the ARI in the PDCCH, and the ARI may be two new bits or Scrambling, or reusing two bits of RV, or reusing other existing bits.
  • the ACK/NACK channel resources corresponding to subframes n+1 and n+2 are the same channel resource in different subframes (n+5 and n+6).
  • the multiple PDSCHs in the FDD system correspond to one ACK/NACK, that is, the binding of the time domain ACK/NACK, and the feedback subframe of the ACK/NACK is n+6, that is, according to the original corresponding to the last PDSCH.
  • ACK/NACK timing Alternatively, the ACK/NACK corresponding to the multiple PDSCHs are separately transmitted without being bound, and the feedback subframes of these ACK/NACKs are all n+6.
  • the channel resource of the ACK/NACK is notified by the ARI in the PDCCH, which may be a new two bits or scrambling code, or reuse two bits of the RV, or reuse other existing bits.
  • the ACK/NACK channel resource corresponding to the PDSCH in the subframe where the PDCCH is located is determined according to the CCE label of the PDCCH, and the original feedback timing is adopted, that is, the ACK/NACK corresponding to the PDSCH of the n subframe is n+4 subframe feedback; ACK/NACK corresponding to the PDSCH in the subframe where the PDCCH is not in the ACK/NACK binding manner or independent transmission, and the feedback timing is based on the original ACK corresponding to the last PDSCH.
  • ACK/NACK corresponding to the PDSCH of the /NACK sequence BP n+6, BP n+1 and P n+2 subframes is fed back in subframe n+6 after time domain bundling, and its channel resources pass through the PDCCH.
  • the ARI notification, the ARI can be a new two bits or scrambling code, or reuse two bits of the RV, or reuse other existing bits.
  • TDD uplink and downlink configuration 2 (as shown in Table 1), where subframes 2 and 7 are uplink subframes, and the remaining 8 are downlink subframes.
  • the ACK/NACK feedback timing the ACK/NACK of the downlink subframes 4, 5, 6, and 8 are fed back in the uplink subframe 2, and the ACK/NACK of the remaining downlink subframes are fed back on the other uplink subframe.
  • subframe 4 The transmitted PDCCH schedules the PDSCH initial transmission packets of the two subframes of the subframes 4 and 5, and the PDCCH transmitted by the subframe 6 schedules the initial transmission packets of the subframes 6 and 8, and the subframes 4 and the PDSCH of the subframe 6 correspond to each other.
  • the ACK/NACK channel resources are respectively determined by notifying the CCE labels of the two PDCCHs, and the ACK/NACK channel resources corresponding to the PDSCHs of the subframe 5 and the subframe 8 are respectively notified by the ARIs in the two PDCCHs, and preferably
  • the ACK/NACK channel resources notified by the PDCCHs of different downlink subframes corresponding to the ACK/NACK in the same uplink subframe are not overlapped, or are described as the same binding window (such as the binding window of the foregoing subframe 2).
  • the ACK/NACK channel resources indicated by the different PDCCHs in the 4, 5, 6, and 8) are not overlapped.
  • the ACK/NACK channel resources corresponding to the subframe 5 and the subframe 8 are different, and the PDCCH is generated in the UE.
  • the base station can discover by blind detection of different ACK/NACK.
  • the ACK/NACK resources corresponding to different PDSCHs indicated by the same PDCCH may be the same, for example, the ACK/NACK channel resources corresponding to subframe 4 and subframe 5 may be the same.
  • the PDCCH may be scheduled across multiple binding windows, such as one PDCCH may be scheduled in subframe 6, sub-frame 8 and three PDSCH initial transmission packets on subframe 9, and the downlink subframes of different binding windows at this time
  • the corresponding ACK/NACK channel resources may be the same, for example, the ACK/NACK channel resources corresponding to subframe 8 and subframe 9 may be the same.
  • the PDCCH sent by the subframe 4 schedules the PDSCH initial transmission packets of the subframe 4, the subframe 5, and the subframe 6 subframes.
  • the ACK/NACK channel resource indication manner may specifically have three methods: a) The ACK/NACK channel resource corresponding to the subframe 4 is determined by the CCE label of the PDCCH, and the ACK/NACK channel resources corresponding to the subframe 5 and the subframe 6 are notified by the ARI in the PDCCH, that is, the number of ACK/NACK channel resources notified.
  • the final UE will be in the above ACK/NACK.
  • the PDCCH may be scheduled across multiple binding windows, taking two windows (sizes M1 and M2 respectively) as an example.
  • the ACK/NACK channel resource corresponding to the PDSCH in the subframe where the PDCCH is located is The CCE label of the PDCCH is determined, such as subframe 5, the PDSCH pair on the subframe where the PDCCH is not located.
  • the ACK/NACK channel resources are notified by the ARIs in the PDCCH, such as subframes 6, 8, and 9, and the number of notifications is the number of PDSCHs in the subframes where the PDCCH is not located in each window, respectively.
  • the number of ACK/NACK channel resources notified is 1, that is, subframe 6.
  • the number of ACK/NACK channel resources notified is 2, that is, subframes 8 and 9, specifically, ARI indication
  • the resources are A1 and A2.
  • the resource A1 is directly taken.
  • A1 and A2 are taken.
  • the number of ACK/NACK channel resources directly indicated by the ARI is respectively scheduled in each binding window.
  • the number of PDSCHs, the indicated ACK/NACK channel resources respectively correspond to the scheduled PDSCHs, for example, for the M1 window, two ACK/NACK channel resources are notified for subframes 5 and 6, respectively, and for the M2 window, two ACKs are notified.
  • the NACK channel resources are for subframes 8 and 9, respectively, and the two windows can share a set of ACK/NACK channel resources, but the ACK/NACK channel resources in each window are different; c) the above ARI directly indicates M1 and M2, respectively.
  • the ACK/NACK channel resources respectively correspond to each subframe in each binding window, that is, for the M1 window, 4 ACK/NACK are notified.
  • the channel resource, for the M2 window notifies 4 ACK/NACK channel resources, which can share a set of ACK/NACK channel resources, but the ACK/NACK channel resources in each window are different.
  • the base station determines the received subframe of the ACK/NACK corresponding to the PDSCH, for example, notifies the pre-configured timing relationship, and receives the PDSCH corresponding to the determined ACK/NACK receiving subframe and the channel resource.
  • ACK/NACK the UE determines the transmission subframe of the ACK/NACK corresponding to the PDSCH, for example, notifies the pre-configured timing relationship, and transmits the ACK/NACK corresponding to the PDSCH on the determined ACK/NACK transmission subframe and the channel resource.
  • the determination of the ACK/NACK channel resources of the retransmission packet can be specifically divided into the following scenarios:
  • the ACK/NACK channel resource corresponding to the retransmission packet is preferably corresponding according to the CCE label of the PDCCH, and the corresponding initial may be reused.
  • the ACK/NACK channel resource for packet transmission can also be determined by ARI. At this point the two bits of the RV are used as RV indications for retransmission.
  • the ACK/NACK channel resource corresponding to the retransmission packet may preferably reuse the ACK/NACK channel resource of the corresponding initial transmission packet. It may also be determined according to the CCE label of the PDCCH that schedules the retransmission packet, and may also be determined by the ARI.
  • the RV field is used as a true retransmission RV version indication. Therefore, in the first embodiment, the ACK/NACK channel resource corresponding to the PDSCH of the subframe where the non-PDCCH is located can be explicitly indicated by the ARI, the scheduling limitation is reduced, and the scheduling flexibility of the PDCCH is improved. In addition, using the field in the existing PDCCH as the ARL also simplifies the format design of the PDCCH.
  • Embodiment 2 is
  • the multi-subframe scheduling can only be the initial transmission, and the retransmission packet only supports the single sub-frame scheduling, and the initial transmission of the multi-subframe scheduling is determined by the SIF and the NDI, and the retransmission is determined by the NDI.
  • the base station sends a PDCCH to the UE in the subframe n, where the PDCCH schedules the PDSCH initial transmission packet of the N subframes of the UE, for example, N may be specifically 1, 2, 3 or 4, but the value of N is not for the present invention.
  • the scope constitutes a limitation.
  • two bits of SIF may be added to the PDCCH to indicate.
  • the UE first determines whether the PDCCH is scheduled to be an initial transmission packet or a retransmission packet according to the DI. If it is an initial transmission packet, the UE further determines whether it is a single subframe scheduling or a multiple subframe scheduling according to the value of the SIF.
  • the schedule is ⁇ n ⁇ , ⁇ n, n+l ⁇ , ⁇ n, n+1 , n+2 ⁇
  • the PDSCH initial transmission packet of the ⁇ n, n+1, n+2, n+3 ⁇ subframe, that is, the SIF not equal to '00' at this time indicates that the initial transmission packet of the multi-subframe is scheduled.
  • RV 0 or 3
  • RV notified by the base station through RRC signaling
  • the SIF field can be redundant, for example, can be used as an ARI to indicate ACK/NACK channel resources.
  • the following may be specifically divided into the following scenarios: 1) When the PDCCH that schedules the retransmission packet is in the same subframe as the PDSCH, that is, the same subframe is scheduled, and the retransmission packet corresponds to
  • the ACK/NACK channel resource preferably corresponds to the CCE label of the PDCCH, and may also reuse the ACK/NACK channel resource of the corresponding initial transmission packet, and may also be determined by the ARI, and the SIF field may be used as the ARI.
  • the RV field is used as a true retransmission RV version indication.
  • the ACK/NACK channel resource corresponding to the retransmission packet may preferably reuse the ACK/NACK channel resource of the corresponding initial transmission packet. It may also be determined according to the CCE label of the PDCCH that schedules the retransmission packet, and may also be determined by the ARI, and the SIF field may be used as the ARI.
  • the RV field is used as a true retransmission RV version indication.
  • the scheme of the second embodiment can redundantly use the SIF field as the ARI in the retransmission packet scheduling, and improves the utilization of the ACK/NACK channel resources.
  • Embodiment 3 :
  • the multi-subframe scheduling can be either initial transmission or retransmission, and the initial transmission and retransmission of the multi-subframe scheduling are determined by SIF and NDI.
  • the base station sends a PDCCH to the UE in the subframe n, where the PDCCH schedules the PDSCH initial transmission packet of the N subframes of the UE, for example, N may be specifically 1, 2, 3 or 4, but the value of N is not for the present invention.
  • the scope constitutes a limitation.
  • two bits of SIF may be added to the PDCCH to indicate.
  • the UE determines, according to the SIF and the NDI, whether the PDCCH schedules an initial transmission packet or a retransmission packet.
  • the initial transmission package if the DI is inverted, it is the initial transmission, and when the SIF is '00' ' ⁇ '10' ' ⁇ , the representation is ⁇ , ⁇ , ⁇ +1 ⁇ , ⁇ , ⁇ +1, ⁇ +2 ⁇ , ⁇ , ⁇ +1, ⁇ +2, ⁇ +3 ⁇ the PDSCH initial transmission packet of the subframe, that is, the SIF is not equal to '00', indicating that the scheduling is performed.
  • the initial transmission packets of ⁇ n, n+l, n+2 ⁇ are scheduled.
  • RV a pre-configured RV
  • the method in the first embodiment is not described herein.
  • a retransmission packet if the NDI does not flip, it is a retransmission, and when the SIF is '00' '01 ' '10, ' 11, 11, the scheduling is ⁇ n ⁇ , ⁇ n, n +l ⁇ , ⁇ n, n+1 , n+2 ⁇ , ⁇ n, n+1 , n+2, n+3 ⁇ PDSCH retransmission packets of subframes, for ACK/NACK channel resources of retransmission packets Determined, can be specifically divided into the following scenarios:
  • the ACK/NACK channel resource corresponding to the retransmission packet is preferably corresponding according to the CCE label of the PDCCH, and the corresponding initial may be reused.
  • the ACK/NACK channel resource for packet transmission can also be determined by ARI.
  • the RV field is used as a true retransmission RV version indication.
  • the ACK/NACK channel resource corresponding to the retransmission packet may preferably reuse the ACK/NACK channel resource of the corresponding initial transmission packet. It may also be determined according to the CCE label of the PDCCH that schedules the retransmission packet, and may also be determined by the ARI. RV field Used as a true retransmission RV version indication.
  • the scheme of the third embodiment displays the ACK/NACK channel resource corresponding to the PDSCH of the subframe where the non-PDCCH is located by using the ARI, reduces the scheduling restriction, and improves the scheduling flexibility of the PDCCH.
  • using the fields in the existing PDCCH to serve as the ARL simplifies the format design of the PDCCH.
  • Embodiment 3 also supports multi-subframe scheduling of retransmission packets and indication of ACK/NACK resources.
  • FIG. 4 is a schematic diagram of an example of scheduling a PDSCH of a plurality of subframes by a PDCCH according to an embodiment of the present invention. It is to be understood that FIG. 4 is a better understanding of the present invention, but does not limit the scope of the invention.
  • the base station schedules two PDSCHs (PDSCH1 and PDSCH2) of subframe 0 and subframe 1 with PDCCH1.
  • a predefined RV 0
  • SIF "01”
  • PDCCH1 schedules two PDSCHs for the current frame (ie, subframe 0) and the next frame (ie, subframe 1).
  • the base station schedules PDSCH0 of subframe 1 with PDCCHO.
  • ACK/NACK corresponding to PDSCH1 (AND is fed back in subframe 4
  • ACK/NACK (AM) and AN2 corresponding to PDSCH2 and PDSCH0) are fed back in subframe 5.
  • the PDSCH1 in one subframe is used with PDCCH1.
  • the CCE label indicates; however, the channel resource corresponding to PDSCH2 in which PDCCH1 is not in one subframe is not indicated by the CCE label, but is indicated by the first indication information (e.g., ARI, etc.).
  • the first indication information e.g., ARI, etc.
  • ACK/NACK of multiple PDSCHs scheduled by multiple subframes is indicated by ARI. Therefore, the channel resources used for the ACK/NACK (AN0 and AN2) feedback corresponding to PDSCH2 and P PDSCH0 can be distinguished. Therefore, even if PDCCH1 and PDCCHO occupy the same CCE label, the channel resources of AN0 and AN2 do not collide. Therefore, scheduling restriction on the PDCCH is not required, and scheduling flexibility of the PDCCH is improved.
  • FIG. 5 is a block diagram of a base station in accordance with one embodiment of the present invention.
  • the base station 50 of Fig. 5 includes a channel transmitting unit 51 and an information receiving unit 52.
  • the channel transmitting unit 51 transmits the PDCCH to the user equipment in one subframe.
  • the PDCCH is used to schedule transmission of a PDSCH of at least two subframes of the user equipment, and the PDCCH carries first indication information, where the PDCCH
  • the indication information indicates a channel resource for transmitting uplink ACK/NACK information corresponding to the PDSCH.
  • the information receiving unit 52 determines a transmission subframe that carries uplink ACK/NACK information corresponding to the PDSCH, and receives uplink ACK/NACK information on the channel resource in the transmission subframe.
  • the PDCCH when the PDCCH schedules multiple PDSCHs, the PDCCH carries the indication information to indicate the channel resources of the ACK/NACK feedback corresponding to the scheduled PDSCH, so that the channel resources of the ACK/NACK feedback corresponding to the multiple PDSCHs can be determined.
  • the base station 50 can perform the various steps of the method of FIG. 2 and implement the above-mentioned first embodiment to the third embodiment. To avoid repetition, details are not described in detail.
  • the PDSCH may adopt a pre-configured redundancy version (RV, Redundant Version).
  • RV Redundancy Version
  • the PDCCH can be used to schedule transmission of the initial transmission PDSCH of at least two subframes of the user equipment. Each subframe corresponds to at least one initial transmission PDSCH.
  • the pre-configured RV used by the initial transmission of the PDSCH may be pre-defined, that is, the base station and the user equipment do not need to interact; or the pre-configured RV used by the initial transmission PDSCH may also be determined by the base station, and then the base station notifies the user equipment of the pre-configuration.
  • the RV for example, can notify the user equipment of the pre-configured RV through RRC signaling.
  • the embodiment of the present invention does not limit the manner of notifying the pre-configured RV.
  • the PDCCH sent by the channel sending unit 51 may carry SIF information, where
  • the SIF information is used to indicate the at least two subframes that are scheduled, so that the user equipment can determine, according to the SIF information carried by the PDCCH, which subframes of the subframe are scheduled for the PDCCH.
  • the PDCCH may carry the SIF information and the DI (New Data Indicator) information, and the SIF information and the DI information are used to jointly indicate the at least two subframes that are scheduled, so that the user equipment may perform the SIF information and the NDI according to the PDCCH. It is comprehensively determined which subframes on which the PDCCH is scheduled to transmit the initial PDSCH.
  • the manner of indicating the scheduled subframe refer to Embodiment 1 to Embodiment 3 above.
  • the first indication information of the channel resource of the uplink ACK/NACK information corresponding to the PDSCH of the PDCCH in the same subframe may be the CCE of the PDCCH.
  • the first indication information of the channel resource of the uplink ACK/NACK information corresponding to the PDSCH that is not in the same subframe as the PDCCH may be an ARI in the PDCCH.
  • the first indication information of the channel resource of the uplink ACK/NACK information corresponding to the PDSCH may be an ARI in the PDCCH.
  • the foregoing ARI may be a specific bit or a scrambling code in the PDCCH.
  • the particular bit may be all or part of the bits in the RV, and/or one bit of the NDI, and/or all or part of the bits in the DAI.
  • the first indication information refer to the above-mentioned Embodiment 1 to Embodiment 3. Therefore, when the PDCCH schedules multiple PDSCHs, the ACK/NACK resource indication field may be used to indicate the channel resources of the ACK/NACK feedback corresponding to the scheduled PDSCH, and the subframe indication field may also be introduced to specifically distinguish the scheduling. The number of subframes, such that the redundancy version field and/or the new data indication field can be used as an ACK/NACK resource indication, improves scheduling flexibility.
  • FIG. 6 is a block diagram of a user equipment in accordance with one embodiment of the present invention.
  • the user equipment 60 of Fig. 6 includes a channel receiving unit 61 and an information transmitting unit 62.
  • the channel receiving unit 61 receives the PDCCH sent by the base station in one subframe, and the PDCCH is used to schedule the transmission of the PDSCH of the at least two subframes of the user equipment, and the PDCCH carries the first indication information, where the first indication information is used for transmission and Channel resources of uplink ACK/NACK information corresponding to the PDSCH.
  • the information transmitting unit 62 determines a transmission subframe carrying the uplink ACK/NACK information corresponding to the PDSCH, and transmits uplink ACK/NACK information on the channel resource in the transmission subframe.
  • the PDCCH when the PDCCH schedules multiple PDSCHs, the PDCCH carries the indication information to indicate the channel resources of the ACK/NACK feedback corresponding to the scheduled PDSCH, so that the channel resources of the ACK/NACK feedback corresponding to the multiple PDSCHs can be determined.
  • the user equipment 60 can perform the various steps of the method of FIG. 3 and implement the above-mentioned first embodiment to the third embodiment. To avoid repetition, details are not described in detail.
  • the redundancy version can be pre-configured PDSCH (RV, Redundant Ver S ion) .
  • the PDCCH may be used to schedule transmission of the initial transmission PDSCH of at least two subframes of the user equipment. Each subframe corresponds to at least one initial transmission PDSCH.
  • the pre-configured RV used by the initial transmission of the PDSCH may be pre-defined, that is, the base station and the user equipment do not need to interact; or the pre-configured RV used by the initial transmission PDSCH may also be determined by the base station, and then the base station notifies the user equipment of the pre-configuration.
  • the RV for example, can notify the user equipment of the pre-configured RV through RRC signaling.
  • the embodiment of the present invention does not limit the manner of notifying the pre-configured RV.
  • the PDCCH received by the channel receiving unit 61 may carry SIF information, where the SIF information is used to indicate the scheduled at least two subframes, so that the user equipment may determine the PDCCH scheduling according to the SIF information carried by the PDCCH. Which are the initial PDSCHs on which subframes.
  • the PDCCH may carry the SIF information and the DI (New Data Indicator) information, and the SIF information and the DI information are used to jointly indicate the at least two subframes that are scheduled, so that the user equipment may perform the SIF information and the NDI according to the PDCCH. It is comprehensively determined which subframes on which the PDCCH is scheduled to transmit the initial PDSCH.
  • the manner of indicating the scheduled subframe refer to the above-mentioned Embodiment 1 to Embodiment 3.
  • the first indication information of the channel resource of the uplink ACK/NACK information corresponding to the PDSCH of the PDCCH in the same subframe is the control channel element CCE label of the PDCCH.
  • the first indication information of the channel resource of the uplink ACK/NACK information corresponding to the PDSCH that is not in the same subframe as the PDCCH is the ACK/NACK resource indication ARI in the PDCCH.
  • the first indication information of the channel resource of the uplink ACK/NACK information corresponding to the PDSCH may be an ARI in the PDCCH.
  • the foregoing ARI may be a specific bit or a scrambling code in the PDCCH.
  • the particular bit may be all or part of the bits in the RV, and/or one bit of the NDI, and/or all or part of the bits in the DAI.
  • the first indication information refer to the above-mentioned Embodiment 1 to Embodiment 3.
  • the ACK/NACK resource indication field may be used to indicate the channel resources of the ACK/NACK feedback corresponding to the scheduled PDSCH, and the subframe indication field may also be introduced to specifically distinguish the scheduling.
  • a communication system may include the above-described base station 50 or user equipment 60.
  • the downlink scheduling grant (DL_grant) will include the downlink allocation indication (DAL Downlink).
  • this field a purpose of this field is to enable the UE to find out whether there is a DL_grant miss check in the ACK/NACK feedback window.
  • this field also has the function of sorting in the ACK/NACK feedback in the feedback window.
  • the previous use of the present invention is an example for explaining the configuration or setting method of the field. Once the method is determined, the above-mentioned sorting and the like are also correspondingly performed.
  • the DAI in DL_grant can be written as DL_DAI.
  • the ACK/NACK feedback window also called the ACK/NACK binding window, refers to the downlink subframe corresponding to the ACK/NACK fed back in one uplink subframe.
  • the specific DL_DAI value is an accumulative counting method.
  • the eNB schedules three downlink subframes of subframes 4, 5, and 6 to the UE by using three DL_grants, and the DL_DAI values of the three DL_grants are 1, 2, respectively. 3.
  • the UE If the UE only receives the DL_grant corresponding to subframes 4 and 6 and misses the DL_grant of subframe 5, the UE will find that DL_DAI is equal to 2 by reading the DL_DAI fields of values 1 and 3 in the two DL_grants. The DL_grant is missed by itself. At this time, even if the PDSCHs of the subframes 4 and P6 are correctly received, the UE does not feed back the ACK to the eNB, thereby avoiding the error of dropping the packet of the subframe 5.
  • the UE will not find the DL_grant missed by the data packet of subframe 5, so if the PDSCH of subframes 4 and 6 are both received positive Indeed, the UE will feed back an ACK, which will result in the loss of the PDSCH packet of frame 5.
  • the introduction of the LTE system multi-subframe scheduling i.e. a DL_ gra nt scheduled downlink sub-frames may be greater than 1, then the value DL_DAI how to configure how the eNB and the UE need to perform information interaction is resolved by transmission and reception DL_DAI problem.
  • the embodiments of the present invention can be solved in a multi-subframe scheduling scenario according to the example embodiments described below.
  • a base station for example, an eNB sends downlink scheduling grant DL_grant information to a user equipment (for example, a UE), where the DL_grant information schedules a PDSCH of at least one downlink subframe, and the at least one downlink subframe belongs to one or more Feedback window.
  • the user equipment receives the downlink scheduling grant DL_grant information sent by the base station, where the DL_grant information schedules the PDSCH of the at least one downlink subframe, the at least one downlink subframe belongs to one or more feedback windows, and the user equipment according to the DL_grant
  • the information transmits feedback information (ACK/NACK information) of the at least one downlink subframe.
  • the DL_grant information does not schedule PDSCHs of other downlink subframes that belong to the one or more feedback windows.
  • the SP for a feedback window, only the base station performs scheduling information with a DL_ gra nt.
  • the user equipment according to DL_ gra nt information, feedback information is transmitted corresponding downlink subframes in the one or more feedback window.
  • the user equipment does not consider counting function DL_ gra nt DA_LAI of information, DA_LAI other purpose, as described in Example I to III.
  • TDD uplink and downlink configuration 2 shown in Table 1 is taken as an example to illustrate:
  • the eNB sends a DL_grant to schedule subframes 4 and 6, that is, scheduling in a feedback window, and for other subframes in the feedback window of subframe 2, subframes 5 and 8 are not in this feedback period. Will be scheduled, so there is no need to use DL_DAI to count, because for this feedback window, the UE either receives only one DL_grant, or misses the check, there will be no missed detection of a part of DL_gra nt; for UE, no The DL DAI will be parsed. If the DL_grant is received, the UE will feed back the ACK/NACK corresponding to the subframes 4 and 6. If not received, the UE will not feed back the ACK/NACK, so no packet loss error will occur.
  • the eNB sends a DL_grant to schedule the subframes 6, 8, and 9, that is, the downlink subframes in the two feedback windows are scheduled, and then the other subframes in the two feedback windows of the subframes 2 and 7 are in this feedback period. It will not be scheduled internally, so there is no need to count with DL_DAI.
  • the eNB and the UE do not need to count with DL_DAI, and the DL_DAI can be used as an ACK/NACK Resource Indicator (ARI, ACK/NACK Resource Indicator) to indicate cross-subframe scheduling.
  • the PDSCH that is scheduled across the subframes means that the DL_grant that schedules the PDSCH is not in the same subframe as the PDSCH.
  • This implementation is simple to implement and does not require DL_DAI counting, and DL_DAI can be used as an ARI to indicate ACK/NACK channel resources, improving ACK/NACK resource utilization.
  • DL_DAI can be used as an ARI to indicate ACK/NACK channel resources, improving ACK/NACK resource utilization.
  • the implementation is not limited to the above-mentioned uplink and downlink configuration 2, and can be similarly applied to other uplink and downlink configurations. Such an application falls within the scope of the embodiments of the present invention.
  • the DL_grant information only schedules a PDSCH of a downlink subframe that belongs to the feedback window. That is, the DL_grant information only schedules the PDSCH of the downlink subframe in one feedback window, and does not schedule the PDSCH of the downlink subframe belonging to other feedback windows.
  • the DL_ gra nt information comprises a downlink assignment index the DL_DAI, for the same count function implemented in the prior art, particularly the counting may be counted according to the number DL_ gra nt scheduling, according to the scheduling may be The number of downlink subframes or the number of scheduled PDSCHs is counted.
  • the user equipment according to the DL_DAI DL_ gra nt and information, transmits the feedback information of at least one downlink subframe in the one feedback window.
  • TDD uplink and downlink configuration 2 shown in Table 1 is taken as an example to illustrate:
  • one DL_grant may not schedule subframes in multiple feedback windows.
  • a DL_grant may not schedule subframes 6, 8 and 9, but may only be scheduled in one feedback window.
  • e B sends DL_grant1 to schedule subframes 4 and 5 in the feedback window of uplink subframe 2, and sends DL_grant2 to schedule subframes 6 and 8 in the feedback window of uplink subframe 2, in which case DL_DAI in DL_grant is required to count
  • the value of the specific DL_DAI may be counted according to the number of DL_grants, or may be counted according to the number of scheduled downlink subframes or the number of scheduled PDSCHs.
  • DL_DAI1 in DL grant1 can take 1 (according to DL_grant number) or 2 (according to the number of scheduled subframes or PDSCH), and DL_DAI2 in DL_grant2 can take 2 or 4.
  • the DL_ PDSCH gra nt scheduling information of the at least one downlink subframe is based on the one or more other scheduling information DL_ gra nt.
  • a plurality of base station may be scheduled DL_ gra nt, and may be scheduled across multiple feedback windows. In this case, the base station considers scheduling across multiple feedback windows arranged at DL_ gra nt DL_DAI values.
  • the base station when the base station a scheduling window DL_ gra nt feedback information is configured DL_DAI value, based on other DL_ gra nt is not the scheduled downlink sub-frame within the feedback window whether other scheduled feedback window Scheduled by DL_grant.
  • the value of the DL DAI can be independently configured without depending on the DL_DAI of other DL_grants.
  • the feedback window in the other is not the DL_ gra nt scheduled downlink subframe is scheduled the scheduled other feedback window DL_ gra nt, DL_DAI values dependent on the scheduling of other feedback window above the DL_grant Scheduling information, where the scheduling information includes the number of downlink subframes in the feedback window in which the DL_grant scheduling other feedback windows is scheduled.
  • the other is not within the DL_ the feedback window gra nt scheduled downlink sub-frame is a time frame and is scheduled prior to the DL_grant downlink subframe in the downlink sub-feedback window.
  • the counting mode of the specific DL_DAI is based on the number of PDSCHs that have been scheduled in the feedback window in which the subframe in which the DL_grant of the DL_DAI is located, or based on the number of DL_grants in the downlink subframe in which the feedback window is currently scheduled. count.
  • the user equipment transmits the feedback information of the corresponding downlink subframes in said plurality of feedback window.
  • the manner of counting the number of PDSCHs scheduled by the subframes in the current feedback window is used as an example.
  • the UE If the UE reads the value of the DL_DAI in the DL_grant and the scheduled downlink in the current feedback window, If the total number of frames is consistent, the UE feeds back ACK/NACK according to the correctness of the received PDSCH in the current feedback window; if the value of the DL_DAI read by the UE is inconsistent with the total number of scheduled downlink subframes in the current feedback window, The UE may not feed back an ACK according to the fact that the UE may not feed back any information, or the UE does not receive the ACK/NACK feedback location mapping codeword NACK of the subframe of the PDSCH in the feedback window.
  • the counting mode of the DL_DAI may be based on the number of PDSCHs currently scheduled in the feedback window in which the subframe in which the DL_grant of the DL_DAI is located, plus the DL_grant including the DL_DAI. The number of PDSCHs in other feedback windows scheduled.
  • FIG. 7 is a diagram showing an example of a PDSCH of a DL_grant scheduling downlink subframe according to an embodiment of the present invention.
  • one DL_gra nt may schedule subframes within multiple feedback windows, and may be scheduled with multiple DL_grants for different subframes within one feedback window.
  • e B value is configured DL_DAI DL_ gra nt can be considered across different scheduling feedback window.
  • the eNB schedules a feedback window
  • the DL_DAI configuration in the DL_grant is to be considered whether the downlink subframes in the feedback window that are not scheduled by the DL_grant are scheduled by the DL_grant of the other feedback window, and the corresponding UE needs to use the DAI when determining the ACK/NACK feedback. Configuration rules.
  • e B sends DL_grant1 to schedule subframes 5 and 6 in the feedback window of uplink subframe 2, and transmits DL_grant2 to schedule subframe 8 in the feedback window of uplink subframe 2 and subframe 9 in the feedback window of uplink subframe 7.
  • DL_DAI1 in DL_grant1 may take a value of 2, indicating that the feedback window is currently scheduled for PDSCH of two sub-frames 5, 6.
  • DL_DAI2 in DL_grant2 takes a value of 3, indicating that the PDSCH of the sub-frames 5, 6, and 8 are currently scheduled (requiring the count of DL_DAI1), and the DL_DAD in DL_grant3 is 3, because not only need to be included.
  • the PDSCH of the two subframes 0, 1 of the current DL_grant3 scheduling needs to include the case where the subframe 9 in the feedback window is scheduled by the DL_grant2 before the subframe 0, 1.
  • the scheduling of the implementation is flexible, and there is no scheduling restriction, and the eNB and the UE avoid packet loss caused by no DL_DAI counting by configuring and parsing the DL_DAI.
  • the implementation is not limited to the specific scheduling example of the uplink and downlink configuration 2 described above, and can be similarly applied to other uplink and downlink configurations and/or other scheduling modes. Such an application falls into the embodiment of the present invention. In the range.
  • the embodiment of the present invention solves the packet loss problem caused by the missed detection of the DL_grant in the multi-subframe scheduling scenario.
  • FIG. 8 is a block diagram of a base station in accordance with another embodiment of the present invention.
  • the base station 80 includes a generating unit 81 and a transmitting unit 82.
  • the generating unit 81 generates downlink scheduling grant DL_grant information, where the DL_grant information schedules a PDSCH of at least one downlink subframe, and the at least one downlink subframe belongs to one or more feedback windows.
  • the DL_grant information does not schedule PDSCHs of other downlink subframes that belong to the one or more feedback windows.
  • the DL_ gra nt only PDSCH scheduling information of downlink sub-frames belonging to the feedback window in the case where at least a part of a downlink subframe the feedback window, the DL_ gra nt only PDSCH scheduling information of downlink sub-frames belonging to the feedback window.
  • the PDSCHs of other downlink subframes in the multiple feedback windows are scheduled by one or more other DL_grant information.
  • the sending unit 82 sends the DL_grant information to the user equipment.
  • the embodiment of the present invention solves the packet loss problem caused by the missed detection of the DL_grant in the multi-subframe scheduling scenario.
  • the DL_ gra nt scheduling information does not belong to the one or more other downlink sub-frame of the feedback window PDSCH.
  • For a feedback window only the base station performs scheduling information with a DL_ gra nt.
  • this implementation is simple to implement and does not require DL_DAI counting, and DL_DAI can be used as an ARI to indicate ACK/NACK channel resources, improving ACK/NACK resource utilization.
  • the DL_ gra nt only PDSCH scheduling information feedback window belonging to the downlink sub-frame.
  • the SP the DL_ gra nt only a PDSCH scheduling information within the downlink sub-frame of the feedback window, not belonging to other feedback window PDSCH scheduling of a downlink subframe.
  • the DL_ gra nt information comprises a downlink assignment index the DL_DAI, for achieving the same prior art counting function, specific counting method may be counted according to the number DL_grant scheduling, according to the scheduling of the downlink may be The number of subframes or the number of scheduled PDSCHs is counted. This implementation is simple to implement and does not require changes to the way DL_DAI is counted in existing systems.
  • the DL_ PDSCH gra nt scheduling information of the at least one downlink subframe is different downlink PDSCH sub feedback within the plurality of window frames by the one or more other scheduling information DL_ gra nt. That is, for different downlink subframes in one feedback window, the base station can be scheduled with multiple DL_grants respectively, and can be scheduled across multiple feedback windows. In this case, the base station considers scheduling across multiple feedback windows arranged at DL_ gra nt DL_DAI values. This embodiment has flexible scheduling, no scheduling restrictions, and e B and UE avoid packet loss due to lack of DL_DAI counting by configuring and parsing DL_DAI.
  • the user equipment 90 of FIG. 9 includes a receiving unit 91 and a feedback unit 92.
  • the receiving unit 91 receives the downlink scheduling grant DL_grant information sent by the base station, where the DL_grant information schedules the PDSCH of the at least one downlink subframe, and the at least one downlink subframe belongs to one or more feedback windows.
  • the DL_ gra nt PDSCH information does not belong to another scheduling said one or more downlink sub frames of the feedback window.
  • the DL_ gra nt only PDSCH scheduling information of downlink sub-frames belonging to the feedback window Alternatively, if the at least one downlink subframe belongs to multiple feedback windows, the PDSCHs of the other downlink subframes in the multiple feedback windows are scheduled by one or more other DL_grant information.
  • the feedback unit 92 of the information transmitting DL_ gra nt at least one downlink subframe of the feedback information (ACK / NACK information).
  • the embodiment of the present invention solves the loss caused by the missed detection of DL_grant in the multi-subframe scheduling scenario. Package problem.
  • the feedback unit 92 send a corresponding feedback information of downlink subframes in the one or more feedback window.
  • this embodiment is simple to implement and does not require DL_DAI counting, and DL_DAI can be used as an ARI to indicate ACK/NACK channel resources, improving ACK/NACK resource utilization.
  • the DL_ gra nt only PDSCH scheduling information feedback window belonging to the downlink sub-frame.
  • the SP the DL_ gra nt only a PDSCH scheduling information within the downlink sub-frame of the feedback window, not belonging to other feedback window PDSCH scheduling of a downlink subframe.
  • the DL_ gra nt information comprises a downlink assignment index the DL_DAI, for achieving the same prior art counting function, specific counting method may be counted according to the number DL_grant scheduling, according to the scheduling of the downlink may be The number of subframes or the number of scheduled PDSCHs is counted.
  • the feedback unit 92 transmits the feedback information of the at least one downlink subframe in the one feedback window according to the DL_grant information and the DL_DAI.
  • This implementation is simple to implement and does not require changes to the way the DL_DAI is counted in existing systems.
  • the DL_ PDSCH gra nt scheduling information of the at least one downlink subframe In the case where at least one of the plurality of downlink sub-frames belonging to the feedback window, the DL_ PDSCH gra nt scheduling information of the at least one downlink subframe.
  • a plurality of base station may be scheduled DL_ gra nt, and may be scheduled across multiple feedback windows.
  • the feedback unit 92 transmits the feedback information of the corresponding downlink subframe in the multiple feedback windows according to the DL_grant information and the DL_DAI.
  • the feedback unit 92 considers the scheduling of the DL_grant across multiple feedback windows when feeding back the ACK/NACK, that is, the configuration rule of the above DL_DAI needs to be considered.
  • This embodiment is flexible in scheduling, has no scheduling restrictions, and e B and UE avoid packet loss due to lack of DL_DAI counting by configuring and parsing DL_DAI.
  • a communication system may include the above-described base station 80 or user equipment 90.
  • Non-conventional multi-subframe scheduling TDD system if the UE only receives DL_ gra nt in a feedback window in the schedule and the DL_grant DL_DAI 1, within the UE needs to feed back a current feedback window of ACK / NACK resources If the UE needs to receive the feedback in a feedback window DL_grant schedule and the DL_grant DL_DAI is greater than 1, the UE current feedback window; control channel element (CCE) occupied by this DL_ gra nt corresponding numerals implicit ACK/NACK configured in Radio Resource Control (RRC) signaling Feedback on ACK/NACK resources.
  • CCE control channel element
  • the UE determines, according to the DL_DAI in the at least one DL_grant, a PDSCH in which only one subframe is scheduled in the feedback window, and the first DL_grant scheduling the PDSCH is sent in the feedback window, the UE is in the first DL_gra ACK/NACK in the feedback window is fed back to the ACK/NACK channel resource corresponding to the control channel element (CCE) label occupied by nt;
  • CCE control channel element
  • the UE determines, according to the DL_DAI in the at least one DL_grant, a PDSCH in which a feedback window is scheduled to be more than one subframe, the UE feeds back an ACK/NACK in the feedback window on the RRC configured ACK/NACK channel resource.
  • the UE optionally, if one DL_gra nt in the first feedback window simultaneously schedules the PDSCH in the first feedback window and the second feedback window, and the UE needs to feed back ACK/NACK on the RRC configured ACK/NACK channel resource, Then, the UE respectively feeds back the ACK/NACK corresponding to the first and second feedback windows on the same RRC configured ACK/NACK channel resource.
  • the base station side method can be described as:
  • the base station schedules at least one DL_grant for the UE, and the at least one DL_grant respectively schedules PDSCH transmission of at least one subframe of the UE;
  • the base station determines, according to the DL_DAI in the at least one DL_grant, a PDSCH in which only one subframe is scheduled in the feedback window, and the first DL_grant scheduling the PDSCH is sent in the feedback window, the base station is in the first DL_gra
  • the ACK/NACK channel resource corresponding to the control channel unit (CCE) label occupied by the nt receives the ACK/NACK in the feedback window fed back by the UE;
  • CCE control channel unit
  • the base station determines, according to the DL_DAI in the at least one DL_grant, a PDSCH in which more than one subframe is scheduled in the feedback window, the base station receives the feedback window in the feedback window of the UE on the RRC configured ACK/NACK channel resource. ACK/NACK.
  • the base station receives the ACK/NACK corresponding to the first and second feedback windows fed back by the UE on the RRC/NACK channel resources of the same RRC configuration.
  • the TDD uplink and downlink configuration 2 shown in Table 1 is taken as an example for illustration. It is assumed that the DL grant1 is transmitted on the subframe 8, and the two PDSCHs of the subframes 8 and 9 are scheduled. The DL_grant2 is transmitted on the subframe 0, and the two PDSCHs of the subframes 0 and 1 are scheduled. According to the configuration method of the DL_DAI in the above embodiment, the DL The DL_DAI1 in the grant1 is configured as 1, and the DL_DAI2 in the DL_grant2 is configured as 3.
  • the UE can determine that the PDSCH of only one subframe 8 is scheduled in the feedback window of the subframe 2 according to the value of the DL_DAI, and the subframe 8 is scheduled.
  • DL_grantl is also in the feedback window (on subframe 8;), so the UE feeds back the ACK/NACK in the feedback window of the subframe 2 on the ACK/NACK channel resource corresponding to the CCE label occupied by the DL_grant1; It can also be determined that three PDSCHs are scheduled in the feedback window of the subframe 7, and the UE feeds back the ACK/NACK in the feedback window of the subframe 7 on the RRC-configured ACK/NACK channel resource.
  • This scheme reduces the resource overhead of ACK/NACK and maintains post-phase compatibility of ACK/NACK feedback for existing systems.
  • the TDD uplink and downlink configuration 2 shown in Table 1 is described by taking the TDD uplink and downlink configuration 2 shown in Table 1 as an example.
  • DL grant1 is transmitted on subframe 4 and two PDSCHs of subframes 4 and 5 are scheduled
  • DL_grant2 is transmitted on subframe 8 and two PDSCHs of subframes 8 and 9 are scheduled
  • DL_grant3 is transmitted on subframe 0 to schedule subframe 0
  • the DL_DAI1 in the DL_grant1 is configured as 2
  • the DL_DAI2 in the DL_grant2 is configured as 3
  • the DL_DAI2 in the DL_grant2 is configured as 3
  • the UE can determine according to the value of the DL_DAI.
  • ACK/NACK in the two feedback windows of subframe 2 and subframe 7.
  • the UE since the DL_grant2 in the feedback window of the subframe 2 simultaneously schedules the subframes (8 and 9) in the two feedback windows, the UE respectively feeds back the subframe 2 on the same RRC configured ACK/NACK channel resource.
  • the implementation of the scheme is relatively simple, and the ACK/NACK channel resources of the two feedback windows do not cause the UE to erroneously select the ACK/NACK channel resource due to different ACK/NACK resources of multiple RRC configurations.
  • the units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, i.e., may be located in one place, or may be distributed over multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present 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, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium.
  • 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 disk or an optical disk, and the like, which can store program codes.

Abstract

本发明实施例提供通信方法、基站和用户设备,其中通信方法包括:在一个子帧中向用户设备发送物理下行控制信道(PDCCH),所述PDCCH用于调度用户设备的至少两个子帧的物理下行共享信道(PDSCH)的传输,并且所述PDCCH携带第一指示信息,所述第一指示信息指示用于传输与PDSCH对应的上行确认/不确认(ACK/NACK)信息的信道资源(201);确定携带PDSCH对应的上行ACK/NACK信息的传输子帧,在该传输子帧中的信道资源上接收上行ACK/NACK信息(202)。本发明实施例在PDCCH调度多个PDSCH时,利用ACK/NACK资源指示字段来指示所调度的PDSCH对应的ACK/NACK反馈的信道资源,提高了调度灵活度。

Description

通信方法、 基站和用户设备 本申请要求于 2011年 12月 23 日提交中国专利局、 申请号为 201110439496.9、 发 明名称为 "通信方法、 基站和用户设备"的中国专利申请的优先权, 其全部内容通过引 用结合在本申请中。 技术领域 本发明实施例涉及无线通信领域,并且更具体地,涉及通信方法、基站和用户设备。 背景技术
LTE (Long Term Evolution, 长期演进)系统中, 基站 (e B, Evolved NodeB)调度用 户设备 (UE, User Equipment)的最小时间间隔是一个子帧。 对于一个子帧中被调度到的 UE在该子帧中会包含该 UE的物理下行控制信道 (PDCCH, Physical Downlink Control Channel PDCCH可以是下行调度授权 (DL_grant, Downlink grant) 或上行调度授权 (UL_grant, Uplink_grant)。 其中, e B发送的 DL_grant或 UL_grant分别携带了指示 物理下行共享信道 (PDSCH, Physical Downlink Shared Channel)或物理上行共享信道 (PUSCH, Physical Uplink Shared Channel)的调度信息。 PUSCH和 PDSCH可以理解为上 下行数据信道。
现有 LTE系统中,一个 PDCCH只能调度一个子帧的 PDSCH数据。具体的, PDCCH 与其调度的 PDSCH在同一个子帧。对于频分双工(FDD, Frequency Division Duplexing) 系统, UE 会在该子帧之后的第四个子帧中反馈该 PDSCH 对应的上行 ACK/NACK ( Acknowledgement/Non- Acknowledgement, 确认 /否定性确认)信息, 对于 TDD系统, UE会在该子帧后至少第四个子帧或之后来反馈该 PDSCH对应的上行 ACK/NACK信 息。 下文中, 也可以将上行 ACK/NACK信息称为上行反馈信息。 反馈的具体时序是预 配置的,该 ACK/NACK的信道资源与上述 PDCCH所占的控制信道单元(CCE, Control Channel Element) 的标号对应。
如果 UE反馈 NACK, eNB后续会用 PDCCH来给 UE调度重传包。 PDCCH中会携 带占据一个比特的新数据指示 (NDI, New Data Indicator) 信息, 来指示当前所调度的 数据包是新包还是旧包。 具体的, 如果 DI比特与之前的 DI取值不一致, 说明是新 包; 如果一致则是旧包。 PDCCH还会携带占据两个比特的冗余版本 (RV, Redundancy version) 号, 会指示 4种不同的版本。 在后续演进版本的 LTE系统中, 为了提高 PDCCH的调度效率, 降低 PDCCH的开 销,会引入 PDCCH的多子帧调度,即一个 PDCCH可以调度多个子帧的 PDSCH。此时, 被一个 PDCCH调度的多个 PDSCH分别需要进行对应的 ACK/NACK反馈,目前的确定 ACK/NACK反馈的信道资源的方式不再适用。 发明内容
本发明实施例提供一种通信方法、 基站和用户设备, 能够确定多个 PDSCH对应的 ACK/NACK反馈的信道资源。
一方面, 提供了一种通信方法, 包括: 在一个子帧中向用户设备发送物理下行控制 信道 PDCCH, PDCCH用于调度用户设备的至少两个子帧的物理下行共享信道 PDSCH 的传输, 并且 PDCCH携带第一指示信息, 第一指示信息指示用于传输与 PDSCH对应 的上行确认 /不确认 ACK/NACK 信息的信道资源; 确定携带 PDSCH 对应的上行 ACK/NACK信息的传输子帧, 在传输子帧中的信道资源上接收上行 ACK/NACK信息。
另一方面, 提供了一种通信方法, 包括: 在一个子帧中接收基站发送的物理下行控 制信道 PDCCH, PDCCH用于调度用户设备的至少两个子帧的物理下行共享信道 PDSCH 的传输, 并且 PDCCH携带第一指示信息, 第一指示信息指示用于传输与 PDSCH对应 的上行确认 /不确认 ACK/NACK 信息的信道资源; 确定携带 PDSCH 对应的上行 ACK/NACK信息的传输子帧, 在传输子帧中的信道资源上发送上行 ACK/NACK信息。
另一方面, 提供了一种基站, 包括: 信道发送单元, 用于在一个子帧中向用户设备 发送物理下行控制信道 PDCCH, PDCCH用于调度用户设备的至少两个子帧的物理下行 共享信道 PDSCH的传输, 并且 PDCCH携带第一指示信息, 第一指示信息指示用于传 输与 PDSCH对应的上行确认 /不确认 ACK/NACK信息的信道资源; 信息接收单元, 用 于确定携带 PDSCH对应的上行 ACK/NACK信息的传输子帧, 在传输子帧中的信道资 源上接收上行 ACK/NACK信息。
另一方面, 提供了一种用户设备, 包括: 信道接收单元, 用于在一个子帧中接收基 站发送的物理下行控制信道 PDCCH, PDCCH用于调度用户设备的至少两个子帧的物理 下行共享信道 PDSCH的传输, 并且 PDCCH携带第一指示信息, 第一指示信息指示用 于传输与 PDSCH对应的上行确认 /不确认 ACK/NACK信息的信道资源;信息发送单元, 用于确定携带 PDSCH对应的上行 ACK/NACK信息的传输子帧, 在传输子帧中的信道 资源上发送上行 ACK/NACK信息。 本发明实施例在 PDCCH调度多个 PDSCH时, 在 PDCCH中携带指示信息以指示 所调度的 PDSCH对应的 ACK/NACK反馈的信道资源,从而能够确定多个 PDSCH对应 的 ACK/NACK反馈的信道资源。 附图说明 为了更清楚地说明本发明实施例的技术方案, 下面将对实施例或现有技术描述中所 需要使用的附图作简单地介绍, 显而易见地, 下面描述中的附图仅仅是本发明的一些实 施例, 对于本领域普通技术人员来讲, 在不付出创造性劳动的前提下, 还可以根据这些 附图获得其他的附图。
图 1是 PDCCH调度多个子帧的 PDSCH的例子的示意图。
图 2是本发明一个实施例的通信方法的流程图。
图 3是本发明另一实施例的通信方法的流程图。
图 4是本发明一个实施例的 PDCCH调度多个子帧的 PDSCH的例子的示意图。 图 5是本发明一个实施例的基站的框图。
图 6是本发明一个实施例的用户设备的框图。
图 7是本发明一个实施例的 DL_grant调度下行子帧的 PDSCH的例子的示意图。 图 8是本发明另一实施例的基站的框图。
图 9是本发明另一实施例的用户设备的框图。 具体实施方式 下面将结合本发明实施例中的附图, 对本发明实施例中的技术方案进行清楚、 完整 地描述, 显然, 所描述的实施例是本发明一部分实施例, 而不是全部的实施例。 基于本 发明中的实施例,本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他 实施例, 都属于本发明保护的范围。
本发明的技术方案, 可以应用于各种通信系统, 例如: GSM, 码分多址 (CDMA,
Code Division Multiple Access)系统, 宽带码分多址 (WCDMA, Wideband Code Division Multiple Access Wireless), 通用分组无线业务 (GPRS, General Packet Radio Service), 长期演进 (LTE, Long Term Evolution) 等。
用户设备 (UE, User Equipment), 也可称之为移动终端 (Mobile Terminal )、 移动 用户设备等, 可以经无线接入网 (例如, RAN, Radio Access Network)与一个或多个核 心网进行通信, 用户设备可以是移动终端, 如移动电话 (或称为"蜂窝"电话) 和具有移 动终端的计算机, 例如, 可以是便携式、 袖珍式、 手持式、 计算机内置的或者车载的移 动装置, 它们与无线接入网交换语言和 /或数据。
基站, 可以是 GSM或 CDMA中的基站 (BTS, Base Transceiver Station), 也可以 是 WCDMA中的基站 (NodeB ), 还可以是 LTE中的演进型基站 (e B或 e-NodeB, evolutional Node B), 本发明并不限定, 但为描述方便, 下述实施例以 Node B为例进行 说明。
在一个 PDCCH调度多个子帧的 PDSCH的情况下, 需要确定多个 PDSCH对应的 ACK/NACK反馈的信道资源。
一个现有方案是, 根据多子帧调度的 PDCCH所占的控制信道单元的标号来对应, 但会带来 PDCCH的调度限制。 图 1是 PDCCH调度多个子帧的 PDSCH的例子的示意 图。
如图 1所示, 在子帧 0, 基站用 PDCCH1调度了子帧 0和子帧 1 的两个 PDSCH (PDSCH1和 PDSCH2); 在子帧 1, 基站用 PDCCH0调度了子帧 1的 PDSCHO。 根据 ACK/NACK的反馈时序关系可知, PDSCH1对应的 ACK/NACK ( AN1 )在子帧 4反馈, PDSCH2和 PDSCHO对应的 ACK/NACK ( ANO和 AN2) 在子帧 5反馈。 如果这两个 PDCCH占用相同的 CCE标号,那么在子帧 5的 AN0和 AN2的信道资源就会发生冲突, 这样 eNB就不可以用相同的 CCE标号来调度这两个 PDCCH, 即引入了调度器的调度 限制。 因此, 图 1的方案降低了 PDCCH的调度灵活性。
图 2是本发明一个实施例的通信方法的流程图。 图 2的方法由基站执行。
201, 在一个子帧中向用户设备发送 PDCCH。 该 PDCCH用于调度用户设备的至少 两个子帧的 PDSCH的传输, 并且 PDCCH携带第一指示信息。 第一指示信息指示用于 传输与 PDSCH对应的上行 ACK/NACK信息的信道资源。
可选地, PDSCH可采用预配置的冗余版本 (RV, Redundant Version ) o 作为一个实 施例, PDCCH可用于调度用户设备的至少两个子帧的初传 PDSCH的传输。 每个子帧 对应于至少一个初传 PDSCH。 初传 PDSCH采用的预配置的 RV可以是预定义的, 即无 需基站和用户设备进行交互; 或者, 初传 PDSCH采用的预配置的 RV也可以由基站确 定,然后基站向用户设备通知该预配置的 RV,例如可通过 RRC (Radio Resource Control, 无线资源控制) 信令向用户设备通知预配置的 RV。 本发明实施例对通知预配置的 RV 的方式不做限制。 可选地, 作为另一实施例, PDCCH可携带 SIF ( Subframe Indicator Field, 子帧指 示域) 信息, 该 SIF 信息用于指示所调度的上述至少两个子帧, 从而用户设备可根据 PDCCH携带的 SIF信息确定该 PDCCH调度的是哪些子帧上的初传 PDSCH。 或者, PDCCH可携带 SIF信息和 DI (New Data Indicator, 新数据指示) 信息, SIF信息和 DI信息用于联合指示所调度的上述至少两个子帧, 从而用户设备可根据 PDCCH携带 的 SIF信息和 DI综合确定该 PDCCH调度的是哪些子帧上的初传 PDSCH。 下文中还 将结合具体实施例, 详细描述所调度子帧的指示方式的各种例子。
可选地, 作为另一实施例, 上述 PDSCH中, 与 PDCCH在相同子帧上的 PDSCH所 对应的上行 ACK/NACK 信息的信道资源的第一指示信息可以是该 PDCCH 的 CCE (Control Channel Element,控制信道单元)标号; 与 PDCCH不在相同子帧上的 PDSCH 所对应的上行 ACK/NACK信息的信道资源的第一指示信息可以是该 PDCCH中的 ARI ( ACK/NACK Resource Indicator, ACK/NACK资源指示)。
可选地, 作为另一实施例, PDSCH对应的上行 ACK/NACK信息的信道资源的第一 指示信息可以是 PDCCH中的 ARI。
可选地, 上述 ARI可以是 PDCCH中的特定比特或扰码。 例如, 该特定比特可以是
RV中的全部或部分比特,和 /或 NDI的一个比特,和 /或 DAK Downlink Assignment Index, 下行分配指示) 中的全部或部分比特。 下文中还将结合具体实施例, 详细描述指示第一 指示信息的各种例子。
202, 确定携带 PDSCH对应的上行 ACK/NACK信息的传输子帧, 在该传输子帧中 的上述信道资源上接收上行 ACK/NACK信息。
本发明实施例对确定传输子帧的方式不作限定, 例如可以采用任何现有的确定方 式。 例如, 可以 PDSCH所在的子帧之后的第 i (i=4、 5、 6等) 个子帧, 作为该传输子 帧。 或者可以采用其他方式, 例如, 所有被调度的 PDSCH的上行反馈信息可以在一个 固定的传输子帧中反馈给基站。
在确定传输子帧之后, 可以在该传输子帧上的相应信道资源 (即, 步骤 201中的第 一指示信息所指示的信道资源) 上接收上行反馈信息。
因此, 本发明实施例在 PDCCH调度多个 PDSCH时, 在 PDCCH中携带指示信息 以指示所调度的 PDSCH对应的 ACK/NACK反馈的信道资源,从而能够确定多个 PDSCH 对应的 ACK/NACK反馈的信道资源。
另外,本发明实施例在 PDCCH调度多个 PDSCH时,可利用 ACK/NACK资源指示 字段来指示所调度的 PDSCH对应的 ACK/NACK反馈的信道资源, 并且还可以引入子 帧指示字段来具体区分调度的子帧数量,这样冗余版本字段和 /或新数据指示字段可以用 作 ACK/NACK资源指示, 提高了调度灵活度。
另外, 对于重传 PDSCH, PDCCH还可以用于调度用户设备的一个或多个子帧的重 传 PDSCH的传输。此时, PDCCH可携带用于传输与重传 PDSCH对应的上行 ACK/NACK 信息的信道资源的第二指示信息。 例如, 第二指示信息可以是 PDCCH的 CCE标号或 ARI, 或重用上述第一指示信息。
此外, 为了指示需要重传 PDSCH的子帧, PDCCH可携带 DI信息, 该 DI信息 用于指示所调度的上述一个或多个子帧(即需要重传 PDSCH的子帧),从而用户设备可 以根据 PDCCH携带的 DI信息确定该 PDCCH调度的是哪些子帧上的重传 PDSCH。 或者, PDCCH可携带 SIF信息和 DI信息, SIF信息和 DI信息用于联合指示所调度 的上述一个或多个子帧,从而用户设备可以根据 PDCCH携带的 SIF信息和 NDI信息综 合确定该 PDCCH调度的是哪些子帧上的重传 PDSCH。 下文中还将结合具体实施例, 详细描述所调度子帧的指示方式的各种例子。
图 3是本发明另一实施例的通信方法的流程图。 图 3的方法由用户设备执行, 并且 与图 2的方法相对应, 因此将适当省略重复的描述。
301, 在一个子帧中接收基站发送的 PDCCH。 该 PDCCH用于调度用户设备的至少 两个子帧的 PDSCH的传输。 该 PDCCH携带第一指示信息, 第一指示信息指示用于传 输与 PDSCH对应的上行 ACK/NACK信息的信道资源。
可选地, PDSCH可采用预配置的 RV。 作为一个实施例, PDCCH可用于调度用户 设备的至少两个子帧的初传 PDSCH的传输。每个子帧对应于至少一个初传 PDSCH。初 传 PDSCH采用的预配置的 RV可以是预定义的, 即无需基站和用户设备进行交互; 或 者, 初传 PDSCH采用的预配置的 RV也可以由基站确定, 然后用户设备接收基站对于 预配置的 RV的通知, 例如基站可通过 RRC (Radio Resource Control, 无线资源控制) 信令向用户设备通知预配置的 RV。 本发明实施例对通知预配置的 RV的方式不做限制。
可选地, 作为另一实施例, PDCCH可携带 SIF信息, 该 SIF信息用于指示所调度 的上述至少两个子帧, 从而用户设备可根据 PDCCH携带的 SIF信息确定该 PDCCH调 度的是哪些子帧上的初传 PDSCH。 或者, PDCCH可携带 SIF信息和 NDI信息, SIF信 息和 DI信息用于联合指示所调度的上述至少两个子帧, 从而用户设备可根据 PDCCH 携带的 SIF信息和 NDI综合确定该 PDCCH调度的是哪些子帧上的初传 PDSCH。 下文 中还将结合具体实施例, 详细描述所调度子帧的指示方式的各种例子。
可选地, 作为另一实施例, 上述 PDSCH中, 与 PDCCH在相同子帧上的 PDSCH所 对应的上行 ACK/NACK信息的信道资源的第一指示信息可以是该 PDCCH的 CCE标号; 与 PDCCH不在相同子帧上的 PDSCH所对应的上行 ACK/NACK信息的信道资源的第一 指示信息可以是该 PDCCH中的 ARI。
可选地, 作为另一实施例, PDSCH对应的上行 ACK/NACK信息的信道资源的第一 指示信息可以是 PDCCH中的 ARI。
可选地, 上述 ARI可以是 PDCCH中的特定比特或扰码。 例如, 该特定比特可以是 RV中的全部或部分比特, 和 /或 NDI的一个比特, 和 /或 DAI中的全部或部分比特。 下 文中还将结合具体实施例, 详细描述指示第一指示信息的各种例子。
302, 确定携带 PDSCH对应的上行 ACK/NACK信息的传输子帧, 在传输子帧中的 上述信道资源上发送上行 ACK/NACK信息。
本发明实施例对确定传输子帧的方式不作限定, 例如可以采用任何现有的确定方 式。 例如, 可以 PDSCH所在的子帧之后的第 i ( i=4、 5、 6等) 个子帧, 作为该传输子 帧。 或者可以采用其他方式, 例如, 所有被调度的 PDSCH的上行反馈信息可以在一个 固定的传输子帧中反馈给基站。
在确定传输子帧之后, 可以在该传输子帧上的相应信道资源 (即, 步骤 301中的第 一指示信息所指示的信道资源) 上发送上行反馈信息。
因此, 本发明实施例在 PDCCH调度多个 PDSCH时, 在 PDCCH中携带指示信息 以指示所调度的 PDSCH对应的 ACK/NACK反馈的信道资源,从而能够确定多个 PDSCH 对应的 ACK/NACK反馈的信道资源。
另外, 对于重传 PDSCH, PDCCH还可以用于调度用户设备的一个或多个子帧的重 传 PDSCH的传输。此时, PDCCH可携带用于传输与重传 PDSCH对应的上行 ACK/NACK 信息的信道资源的第二指示信息。 例如, 第二指示信息可以是 PDCCH的 CCE标号或 ARI, 或重用上述第一指示信息。
此外, 为了指示需要重传 PDSCH的子帧, PDCCH可携带 DI信息, 该 DI信息 用于指示所调度的上述一个或多个子帧(即需要重传 PDSCH的子帧),从而用户设备可 以根据 PDCCH携带的 NDI信息确定该 PDCCH调度的是哪些子帧上的重传 PDSCH。 或者, PDCCH可携带 SIF信息和 DI信息, SIF信息和 DI信息用于联合指示所调度 的上述一个或多个子帧,从而用户设备可以根据 PDCCH携带的 SIF信息和 NDI信息综 合确定该 PDCCH调度的是哪些子帧上的重传 PDSCH。 下文中还将结合具体实施例, 详细描述所调度子帧的指示方式的各种例子。
下面, 结合具体例子, 更加详细的描述本发明的实施例。 但是应注意, 下面的例子 只是示意性的, 而不是要限制本发明的范围。 例如, 下面的例子中, ARI重用 PDCCH 中的现有 RV的 2个比特来表示。 但本发明实施例可采用其他形式的 ARL 例如可以是 扰码形式的, 或者采用新增的比特, 或者采用其他信息元 (例如 NDI、 DAI) 的比特, 或者只采用 RV 中的部分比特 (例如前一个比特或后一个比特), 或者上述各种方式的 组合。 这些修改均落入本发明的范围内。
另外, 为了清楚地描述各个实施例, 对下面的实施例进行了编号。 但这不是要限制 本发明的实施形式。 例如, 不同编号的实施例之间的一些元素也可以组合使用, 而不限 于该元素所在的实施例的特定实现方式。 这样的组合使用也落入本发明的范围内。 实施例一:
在实施例一中, 多子帧调度只可以是初传, 而重传包只支持单子帧调度, 且多子帧 调度的初传由 SIF来确定, 重传由 SIF和 NDI确定。
基站在子帧 n中给 UE发送一个 PDCCH, 该 PDCCH调度了该 UE的 N个子帧的 PDSCH初传包。 例如 N可以具体为 1、 2、 3或 4, 但是 N的取值不对本发明的范围构 成限制。
此时可以在 PDCCH中增加两个比特的 SIF来指示,具体地, SIF分别为 '00, '01, ' 10' ' 11 ' 时, 表示调度的是 {n}, {n, n+l }, {n, n+1 , n+2} , {n, n+1 , n+2, n+3} 子帧的 PDSCH, 即此时 SIF不等于 '00' 表示的是调度了多子帧的初传包。 以 N=3为 例, 则调度的是 {n, n+1 , n+2}三个子帧的初传包。 此时这三个 PDSCH初传包采用预 配置的 RV, 例如 RV=0或 3, 或者采用基站通过 RRC信令通知的 RV, 以使得 UE根据 这个 RV来接收这几个 PDSCH。
对于这几个 PDSCH对应的 ACK/NACK信道资源的确定, 可以分别针对 FDD和
TDD系统来分别描述:
对于 FDD系统:
1 )假设 FDD系统中每个 PDSCH对应一份 ACK/NACK, 且保持 ACK/NACK反馈 时序不变, 即相对于其对应的 PDSCH延迟 4个子帧(i=4), 则 n子帧的 PDSCH对应的 ACK/NACK在 n+4子帧反馈, 同理 n+1和 n+2的 PDSCH对应的 ACK/NACK分别在 n+5和 n+6子帧反馈。则该 PDCCH所在的子帧上的 PDSCH所对应的 ACK/NACK信道 资源与该 PDCCH的 CCE标号对应, 即子帧 n的 PDSCH所对应的 ACK/NACK信道资 源根据该 PDCCH的 CCE标号来隐式对应, 进一步地, 如果 PDCCH通过预编码的方式 发送在 PDSCH区域,则也可以通过该 PDCCH的 RB或 RB对或天线端口的标号来确定; 非该 PDCCH所在的子帧上的 PDSCH所对应的 ACK/NACK信道资源由该 PDCCH中的 ARI通知,即子帧 n+1和 n+2分别对应的 ACK/NACK信道资源通过该 PDCCH中的 ARI 来显示通知, 该 ARI可以是新增的两个比特或扰码, 或重用 RV的两个比特, 或重用其 他现有比特。 可选地, 子帧 n+1和 n+2对应的 ACK/NACK信道资源是不同子帧 (n+5 和 n+6) 上的同一个信道资源。
2)假设 FDD系统中这多个 PDSCH对应一份 ACK/NACK,即采用时域 ACK/NACK 的绑定, 此时 ACK/NACK 的反馈子帧是 n+6, 即根据最后一个 PDSCH 对应的原 ACK/NACK时序。 或者, 这多个 PDSCH分别对应的 ACK/NACK不作绑定而分别独立 传输,且这些 ACK/NACK的反馈子帧都是 n+6。 ACK/NACK的信道资源通过该 PDCCH 中的 ARI通知, 该 ARI可以是新增的两个比特或扰码, 或重用 RV的两个比特, 或重用 其他现有比特。
3 )假设 FDD系统中,该 PDCCH所在的子帧上的 PDSCH所对应的 ACK/NACK信 道资源根据该 PDCCH的 CCE标号确定, 且采用原反馈时序, 即 n子帧的 PDSCH对应 的 ACK/NACK在 n+4子帧反馈; 对于非该 PDCCH所在的子帧上的 PDSCH所对应的 ACK/NACK采用 ACK/NACK绑定方式或不绑定分别独立传输,其反馈时序根据最后一 个 PDSCH对应的原 ACK/NACK时序, BP n+6, BP n+1禾 P n+2子帧的 PDSCH对应的 ACK/NACK采用时域绑定后反馈在子帧 n+6上,且其信道资源通过该 PDCCH中的 ARI 通知, 该 ARI可以是新增的两个比特或扰码, 或重用 RV的两个比特, 或重用其他现有 比特。
对于 TDD系统, 假设采用 TDD上下行配置 2 (如表 1所示), 其中子帧 2和 7为 上行子帧, 其余 8个为下行子帧。 对于 ACK/NACK反馈时序, 下行子帧 4,5,6和 8的 ACK/NACK都反馈在上行子帧 2上,其余下行子帧的 ACK/NACK都反馈在另一个上行 子帧上。
表 1
Figure imgf000011_0001
1 ) 假设 TDD系统, 且 ACK/NACK采用时域绑定的模式。 一个实施例中, 子帧 4 发送的 PDCCH调度了子帧 4和 5两个子帧的 PDSCH初传包,且子帧 6发送的 PDCCH 调度了子帧 6和 8的初传包, 此时子帧 4和子帧 6的 PDSCH对应的 ACK/NACK信道 资源是分别通知上述两个 PDCCH的 CCE标号来确定的, 子帧 5和子帧 8的 PDSCH对 应的 ACK/NACK信道资源是分别通过上述两个 PDCCH中的 ARI通知的, 且优选地, 同一个上行子帧中的 ACK/NACK对应的不同下行子帧的 PDCCH所通知的 ACK/NACK 信道资源是不重叠的, 或者描述为同一个绑定窗 (如上述子帧 2的绑定窗为 4,5,6,8 ) 内 的不同 PDCCH指示的 ACK/NACK信道资源是不重叠的, 例如上述子帧 5和子帧 8对 应的 ACK/NACK信道资源是不同的, 是为了在 UE发生 PDCCH漏检时, 基站可以通 过不同 ACK/NACK 的盲检测来发现。 但同一个 PDCCH指示的不同 PDSCH对应的 ACK/NACK资源可以是相同的,如子帧 4和子帧 5对应的 ACK/NACK信道资源可以是 相同的。 另一个实施例中, PDCCH可以跨多个绑定窗调度, 如一个 PDCCH可以调度 子帧 6, 子帧 8和子帧 9上的三个 PDSCH初传包, 此时不同绑定窗的下行子帧对应的 ACK/NACK信道资源是可以相同的,比如子帧 8和子帧 9对应的 ACK/NACK信道资源 是可以相同的。
2) 假设 TDD系统, 且 ACK/NACK采用信道选择的模式。 一个实施例中, 子帧 4 发送的 PDCCH调度了子帧 4, 子帧 5 和子帧 6 三个子帧的 PDSCH初传包, 此时 ACK/NACK信道资源的指示方式具体可以有三种方法: a) 子帧 4对应的 ACK/NACK 信道资源通过该 PDCCH的 CCE标号确定, 子帧 5和子帧 6对应的 ACK/NACK信道资 源通过该 PDCCH中的 ARI通知, 即通知的 ACK/NACK信道资源的个数为调度的非 PDCCH子帧上的 PDSCH的个数, 且通知的是两个不同的 ACK/NACK资源, 且不同于 上述子帧 4对应的 ACK/NACK信道资源,最终 UE会在上述 ACK/NACK信道资源上做 信道选择来发送 ACK/NACK; b)上述 ARI直接指示的 ACK/NACK信道资源的个数等 于该 PDCCH所调度的 PDSCH的个数,指示的 ACK/NACK信道资源分别对应所调度的 各个 PDSCH; c)上述 ARI直接指示 M个 ACK/NACK信道资源分别对应该绑定窗内的 各个子帧, M为绑定窗内的下行子帧数, UE在所通知的 ACK/NACK信道资源上做 M=4 的信道选择来发送 ACK/NACK。 另一个实施例中, PDCCH可以跨多个绑定窗调度, 以 两个窗(大小分别为 Ml和 M2)为例,假设子帧 5上发送的一个 PDCCH调度了子帧 5, 子帧 6, 子帧 8和子帧 9上的 4个 PDSCH初传包,此时 ACK/NACK信道资源的指示方 式具体可以有三种方法: a) 该 PDCCH所在子帧上的 PDSCH对应的 ACK/NACK信道 资源由该 PDCCH的 CCE标号确定, 如子帧 5, 非该 PDCCH所在子帧上的 PDSCH对 应的 ACK/NACK信道资源由该 PDCCH中的 ARI通知,如子帧 6,8和 9,且通知的个数 分别是每个窗内的非该 PDCCH所在子帧上的 PDSCH的个数,对于上述窗 Ml,通知的 ACK/NACK信道资源个数为 1, 即子帧 6, 对于窗 M2, 通知的 ACK/NACK信道资源 的个数为 2, 即子帧 8和 9, 具体地, ARI指示的资源为 A1和 A2, 对于 Ml窗, 直接 取资源 Al, 对于 M2窗, 取 A1和 A2; b)上述 ARI直接指示的 ACK/NACK信道资源 的个数分别为每个绑定窗内调度的 PDSCH的个数, 指示的 ACK/NACK信道资源分别 对应所调度的各个 PDSCH, 如对于 Ml窗, 通知两个 ACK/NACK信道资源分别对于子 帧 5和 6, 对于 M2窗, 通知两个 ACK/NACK信道资源分别对于子帧 8和 9, 这两个窗 可以共享一套 ACK/NACK信道资源,但每个窗内的 ACK/NACK信道资源是不同的; c) 上述 ARI直接分别指示 Ml和 M2个 ACK/NACK信道资源分别对应各绑定窗内的各个 子帧,即对于 Ml窗,通知 4个 ACK/NACK信道资源,对于 M2窗,通知 4个 ACK/NACK 信道资源, 这两个窗可以共享一套 ACK/NACK信道资源, 但每个窗内的 ACK/NACK 信道资源是不同的。
确定了 ACK/NACK信道资源之后,基站确定这些 PDSCH对应的 ACK/NACK的接 收子帧, 例如, 通知预配置的时序关系, 且在确定的 ACK/NACK接收子帧和信道资源 上接收上述 PDSCH 对应的 ACK/NACK。 相应地, UE 确定这些 PDSCH 对应的 ACK/NACK的发送子帧, 例如, 通知预配置的时序关系, 且在确定的 ACK/NACK发送 子帧和信道资源上发送上述 PDSCH对应的 ACK/NACK。
对于重传包的调度,该实施例一只支持单子帧调度,重传包通知由 SIF和 DI来指 示。 具体地, 当 SIF= '00' 时, 表示单子帧调度, 此时如果 DI相对于之前同样进程 的 PDCCH中的 DI不翻转的话, 就表示是重传包。
对于重传包的 ACK/NACK信道资源的确定, 可以具体分为如下几个场景:
1 ) 当调度重传包的 PDCCH与 PDSCH在相同子帧时, 即同子帧调度, 该重传包对 应的 ACK/NACK信道资源优选地根据 PDCCH的 CCE标号对应, 也可以重用其对应的 初传包的 ACK/NACK信道资源, 还可以通过 ARI确定。 此时 RV的两比特就用作重传 的 RV指示。
2) 当调度重传包的 PDCCH与 PDSCH在不同子帧时, 即跨子帧调度, 该重传包对 应的 ACK/NACK信道资源优选地可以重用其对应的初传包的 ACK/NACK信道资源, 也可以根据调度该重传包的 PDCCH的 CCE标号确定, 还可以通过 ARI确定。 RV字段 用作真正的重传 RV版本指示。 因此, 实施例一可通过 ARI 显式指示非 PDCCH 所在子帧的 PDSCH 对应的 ACK/NACK信道资源, 减小了调度限制, 提高了 PDCCH的调度灵活性。 另外, 通过 重用现有 PDCCH中的字段来用作 ARL 也简化了 PDCCH的格式设计。 实施例二:
在实施例二中, 多子帧调度只可以是初传, 而重传包只支持单子帧调度, 且多子帧 调度的初传由 SIF和 NDI来确定, 重传由 NDI确定。
基站在子帧 n中给 UE发送一个 PDCCH, 该 PDCCH调度了该 UE的 N个子帧的 PDSCH初传包, 例如 N可以具体为 1、 2、 3或 4, 但是 N的取值不对本发明的范围构 成限制。
此时可以在 PDCCH中增加两个比特的 SIF来指示。 具体地, UE先根据 DI来判 断该 PDCCH调度的是初传包还是重传包, 如果是初传包, 则该 UE再根据 SIF的取值 来判断是单子帧调度还是多子帧调度。 例如, 当 DI翻转, 且 SIF为 '00' '01 ' ' 10' ' 11, 时, 表示调度的是 {n}, {n, n+l }, {n, n+1 , n+2}, {n, n+1 , n+2, n+3}子帧的 PDSCH初传包, 即此时 SIF不等于 '00' 表示的是调度了多子帧的初传包。 以 N=3为 例, 则调度的是 {n, n+1 , n+2}三个子帧的初传包。 此时这三个 PDSCH初传包采用预 配置的 RV, 例如 RV=0或 3, 或者采用基站通过 RRC信令通知的 RV, 以使得 UE根据 这个 RV来接收这几个 PDSCH。 对于初传包的 PDSCH对应的 ACK/NACK信道资源的 确定和发送如实施例一中的方法, 在此不作赘述。
对于重传包的调度, 由于重传只支持单子帧调度, 因此 UE可以仅根据 DI不翻转 来确定重传包调度。 一个实施例中, 当 DI不翻转且 SIF= '00' 时, UE确定为单子帧 的重传包调度; 另一个实施例中, 当 DI不翻转时, UE确定为单子帧的重传包调度, 此时 SIF字段就可以冗余出来, 例如可以用作 ARI来指示 ACK/NACK信道资源。
对于重传包的 ACK/NACK信道资源的确定, 可以具体分为如下几个场景: 1 ) 当调度重传包的 PDCCH与 PDSCH在相同子帧时, 即同子帧调度, 该重传包对 应的 ACK/NACK信道资源优选地根据 PDCCH的 CCE标号对应, 也可以重用其对应的 初传包的 ACK/NACK信道资源, 还可以通过 ARI确定, 此时 SIF字段可以用作 ARI。 RV字段用作真正的重传 RV版本指示。
2) 当调度重传包的 PDCCH与 PDSCH在不同子帧时, 即跨子帧调度, 该重传包对 应的 ACK/NACK信道资源优选地可以重用其对应的初传包的 ACK/NACK信道资源, 也可以根据调度该重传包的 PDCCH的 CCE标号确定,还可以通过 ARI确定,此时 SIF 字段可以用作 ARI。 RV字段用作真正的重传 RV版本指示。
实施例二的方案在重传包调度时可以冗余出 SIF 字段来用作 ARI, 提高了 ACK/NACK信道资源的利用率。 实施例三:
在实施例三中, 多子帧调度既可以是初传, 也可以是重传, 且多子帧调度的初传和 重传都是由 SIF和 NDI来确定。
基站在子帧 n中给 UE发送一个 PDCCH, 该 PDCCH调度了该 UE的 N个子帧的 PDSCH初传包, 例如 N可以具体为 1、 2、 3或 4, 但是 N的取值不对本发明的范围构 成限制。
此时可以在 PDCCH中增加两个比特的 SIF来指示。 具体地, UE根据 SIF和 NDI 来判断该 PDCCH调度的是初传包还是重传包。一个初传包的实施例中,如果 DI翻转, 则为初传, 且此时 SIF为 '00' 'Ο ' 10' ' Ι 时, 表示调度的是 {η}, {η, η+1 }, {η, η+1, η+2} , {η, η+1 , η+2, η+3}子帧的 PDSCH初传包, 即此时 SIF不等于 '00' 表 示的是调度了多子帧的初传包, 以 N=3为例, 则调度的是 {n, n+l, n+2}三个子帧的初 传包。 此时这三个 PDSCH初传包采用预配置的 RV, 例如 RV=0或 3, 或者采用基站通 过 RRC信令通知的 RV, 以使得 UE根据这个 RV来接收这几个 PDSCH。对于初传包的 PDSCH对应的 ACK/NACK信道资源的确定和发送如实施例一中的方法, 在此不作赘 述。 一个重传包的实施例中, 如果 NDI不翻转, 则为重传, 且此时 SIF为 '00' '01 ' ' 10, ' 11, 时, 表示调度的是 {n}, {n, n+l }, {n, n+1 , n+2} , {n, n+1 , n+2, n+3} 子帧的 PDSCH重传包, 对于重传包的 ACK/NACK信道资源的确定, 可以具体分为如 下几个场景:
1 ) 当调度重传包的 PDCCH与 PDSCH在相同子帧时, 即同子帧调度, 该重传包对 应的 ACK/NACK信道资源优选地根据 PDCCH的 CCE标号对应, 也可以重用其对应的 初传包的 ACK/NACK信道资源, 还可以通过 ARI确定。 RV字段用作真正的重传 RV 版本指示。
2) 当调度重传包的 PDCCH与 PDSCH在不同子帧时, 即跨子帧调度, 该重传包对 应的 ACK/NACK信道资源优选地可以重用其对应的初传包的 ACK/NACK信道资源, 也可以根据调度该重传包的 PDCCH的 CCE标号确定, 还可以通过 ARI确定。 RV字段 用作真正的重传 RV版本指示。
在初传中, 实施例三的方案通过 ARI显示指示非 PDCCH所在子帧的 PDSCH对应 的 ACK/NACK信道资源, 减小了调度限制, 提高了 PDCCH的调度灵活性。 另外, 通 过重用现有 PDCCH中的字段来用作 ARL 简化了 PDCCH的格式设计。 此外, 实施例 三还支持重传包的多子帧调度和 ACK/NACK资源的指示。
图 4是本发明一个实施例的 PDCCH调度多个子帧的 PDSCH的例子的示意图。 应 理解, 对比图 1的方案, 图 4有助于本领域技术人员更好地理解本发明, 但非限制本发 明的范围。
如图 4所示, 在子帧 0, 基站用 PDCCH1调度了子帧 0和子帧 1 的两个 PDSCH (PDSCH1和 PDSCH2)。 在 PDCCH1所在的子帧 0中, PDSCH采用预配置的 RV (例 如预定义的 RV=0)。 在此例子中, SIF= " 01 ", 表示 PDCCH1调度本帧 (即子帧 0 ) 和 下一帧 (即子帧 1 ) 的两个 PDSCH。
另外, 与图 1的方案类似, 在子帧 1, 基站用 PDCCHO调度了子帧 1的 PDSCH0。 根据 ACK/NACK的反馈时序关系可知, PDSCH1对应的 ACK/NACK ( AND在子 帧 4反馈, PDSCH2和 PDSCH0对应的 ACK/NACK ( AM)和 AN2 ) 在子帧 5反馈。
如果按照图 1的方案, 在 PDCCH1和 PDCCHO占用相同的 CCE标号的情况下, 那 么在子帧 5的 AN0和 AN2的信道资源就会发生冲突,这样 eNB就不可以用相同的 CCE 标号来调度这两个 PDCCH, 即引入了调度器的调度限制。 因此, 图 1 的方案降低了 PDCCH的调度灵活性。
然而, 按照本发明实施例的上述方案, 与 PDCCH1在一个子帧中的 PDSCH1采用
CCE标号指示; 但是, 与 PDCCH1不在一个子帧中的 PDSCH2对应的信道资源不采用 CCE标号指示, 而是由第一指示信息 (例如, ARI等)指示。 或者, 多子帧调度的多个 PDSCH 的 ACK/NACK 都通过 ARI 来指示。 因此, PDSCH2 禾 P PDSCH0 对应的 ACK/NACK ( AN0和 AN2 ) 反馈所用的信道资源能区分开。 因此, 即使 PDCCH1 和 PDCCHO占用相同的 CCE标号, AN0和 AN2的信道资源也不会发生冲突。从而无需对 PDCCH进行调度限制, 提高了 PDCCH的调度灵活性。
图 5是本发明一个实施例的基站的框图。 图 5的基站 50包括信道发送单元 51和信 息接收单元 52。
信道发送单元 51在一个子帧中向用户设备发送 PDCCH。 该 PDCCH用于调度所述 用户设备的至少两个子帧的 PDSCH的传输, 并且 PDCCH携带第一指示信息, 该第一 指示信息指示用于传输与 PDSCH对应的上行 ACK/NACK信息的信道资源。 信息接收 单元 52确定携带 PDSCH对应的上行 ACK/NACK信息的传输子帧, 在传输子帧中的上 述信道资源上接收上行 ACK/NACK信息。
本发明实施例在 PDCCH调度多个 PDSCH时, 在 PDCCH中携带指示信息以指示 所调度的 PDSCH对应的 ACK/NACK反馈的信道资源,从而能够确定多个 PDSCH对应 的 ACK/NACK反馈的信道资源。
基站 50可执行图 2的方法的各个步骤, 并实现上述实施例一至实施例三, 为避免 重复, 不再详细描述。
例如,可选地,作为一个实施例, PDSCH可采用预配置的冗余版本(RV, Redundant Version)。 例如, PDCCH可用于调度用户设备的至少两个子帧的初传 PDSCH的传输。 每个子帧对应于至少一个初传 PDSCH。初传 PDSCH采用的预配置的 RV可以是预定义 的, 即无需基站和用户设备进行交互; 或者, 初传 PDSCH采用的预配置的 RV也可以 由基站确定, 然后基站向用户设备通知该预配置的 RV, 例如可通过 RRC信令向用户设 备通知预配置的 RV。 本发明实施例对通知预配置的 RV的方式不做限制。
可选地, 作为另一实施例, 信道发送单元 51发送的 PDCCH可携带 SIF信息, 该
SIF信息用于指示所调度的所述至少两个子帧,从而用户设备可根据 PDCCH携带的 SIF 信息确定该 PDCCH调度的是哪些子帧上的初传 PDSCH。 或者, PDCCH可携带 SIF信 息和 DI (New Data Indicator, 新数据指示)信息, SIF信息和 DI信息用于联合指示 所调度的上述至少两个子帧,从而用户设备可根据 PDCCH携带的 SIF信息和 NDI综合 确定该 PDCCH调度的是哪些子帧上的初传 PDSCH。 所调度子帧的指示方式的例子可 参见上述实施例一至实施例三。
可选地, 作为另一实施例, 信道发送单元 52发送的 PDSCH中, 与 PDCCH在相同 子帧上的 PDSCH所对应的上行 ACK/NACK信息的信道资源的第一指示信息可以是该 PDCCH的 CCE标号; 与 PDCCH不在相同子帧上的 PDSCH所对应的上行 ACK/NACK 信息的信道资源的第一指示信息可以是该 PDCCH中的 ARI。
可选地, 作为另一实施例, PDSCH对应的上行 ACK/NACK信息的信道资源的第一 指示信息可以是 PDCCH中的 ARI。
可选地, 上述 ARI可以是 PDCCH中的特定比特或扰码。 例如, 该特定比特可以是 RV中的全部或部分比特, 和 /或 NDI的一个比特, 和 /或 DAI中的全部或部分比特。 第 一指示信息的例子可参见上述实施例一至实施例三。 因此,本发明实施例在 PDCCH调度多个 PDSCH时,可利用 ACK/NACK资源指示 字段来指示所调度的 PDSCH对应的 ACK/NACK反馈的信道资源, 并且还可以引入子 帧指示字段来具体区分调度的子帧数量,这样冗余版本字段和 /或新数据指示字段可以用 作 ACK/NACK资源指示, 提高了调度灵活度。
图 6是本发明一个实施例的用户设备的框图。 图 6的用户设备 60包括信道接收单 元 61和信息发送单元 62。
信道接收单元 61在一个子帧中接收基站发送的 PDCCH, 该 PDCCH用于调度用户 设备的至少两个子帧的 PDSCH的传输, 并且 PDCCH携带第一指示信息, 该第一指示 信息指示用于传输与 PDSCH对应的上行 ACK/NACK信息的信道资源。 信息发送单元 62确定携带 PDSCH对应的上行 ACK/NACK信息的传输子帧, 在传输子帧中的信道资 源上发送上行 ACK/NACK信息。
本发明实施例在 PDCCH调度多个 PDSCH时, 在 PDCCH中携带指示信息以指示 所调度的 PDSCH对应的 ACK/NACK反馈的信道资源,从而能够确定多个 PDSCH对应 的 ACK/NACK反馈的信道资源。
用户设备 60可执行图 3的方法的各个步骤, 并实现上述实施例一至实施例三, 为 避免重复, 不再详细描述。
例如,可选地,作为一个实施例, PDSCH可采用预配置的冗余版本(RV, Redundant VerSion)。 例如, PDCCH可用于调度用户设备的至少两个子帧的初传 PDSCH的传输。 每个子帧对应于至少一个初传 PDSCH。初传 PDSCH采用的预配置的 RV可以是预定义 的, 即无需基站和用户设备进行交互; 或者, 初传 PDSCH采用的预配置的 RV也可以 由基站确定, 然后基站向用户设备通知该预配置的 RV, 例如可通过 RRC信令向用户设 备通知预配置的 RV。 本发明实施例对通知预配置的 RV的方式不做限制。
可选地, 作为另一实施例, 信道接收单元 61接收的 PDCCH可携带 SIF信息, 该 SIF信息用于指示所调度的至少两个子帧, 从而用户设备可根据 PDCCH携带的 SIF信 息确定该 PDCCH调度的是哪些子帧上的初传 PDSCH。 或者, PDCCH可携带 SIF信息 和 DI (New Data Indicator, 新数据指示) 信息, SIF信息和 DI信息用于联合指示所 调度的上述至少两个子帧,从而用户设备可根据 PDCCH携带的 SIF信息和 NDI综合确 定该 PDCCH调度的是哪些子帧上的初传 PDSCH。 所调度子帧的指示方式的例子可参 见上述实施例一至实施例三。
可选地, 作为另一实施例, 信道接收单元 61接收的 PDCCH所调度的 PDSCH中, 与 PDCCH在相同子帧上的 PDSCH所对应的上行 ACK/NACK信息的信道资源的第一指 示信息为 PDCCH的控制信道单元 CCE标号。 信道接收单元 61接收的 PDCCH所调度 的 PDSCH中, 与 PDCCH不在相同子帧上的 PDSCH所对应的上行 ACK/NACK信息的 信道资源的第一指示信息为 PDCCH中的 ACK/NACK资源指示 ARI。
可选地, 作为另一实施例, PDSCH对应的上行 ACK/NACK信息的信道资源的第一 指示信息可以是 PDCCH中的 ARI。
可选地, 上述 ARI可以是 PDCCH中的特定比特或扰码。 例如, 该特定比特可以是 RV中的全部或部分比特, 和 /或 NDI的一个比特, 和 /或 DAI中的全部或部分比特。 第 一指示信息的例子可参见上述实施例一至实施例三。
因此,本发明实施例在 PDCCH调度多个 PDSCH时,可利用 ACK/NACK资源指示 字段来指示所调度的 PDSCH对应的 ACK/NACK反馈的信道资源, 并且还可以引入子 帧指示字段来具体区分调度的子帧数量,这样冗余版本字段和 /或新数据指示字段可以用 作 ACK/NACK资源指示, 提高了调度灵活度。
根据本发明实施例的通信系统可包括上述基站 50或用户设备 60。
LTE TDD系统中, 下行调度授权 (DL_grant)中会包含下行分配指示 (DAL Downlink
Assignment Index),该字段的一个用途是用来使 UE可以发现 ACK/NACK反馈窗内是否 有 DL_grant漏检的问题,此外该字段还存在反馈窗内的 ACK/NACK反馈时的排序等作 用, 本发明以前一个用途为例进行说明本字段的配置或设定方法, 一旦该方法确定后, 相应还具有上述排序等作用。 DL_grant中的 DAI可以写成 DL_DAI。 所谓 ACK/NACK 反馈窗, 也叫 ACK/NACK绑定窗, 是指一个上行子帧中反馈的 ACK/NACK对应的下 行子帧。
例如, 以上面的表 1中所示的 TDD上下行配置 2为例, 上行子帧 2中的 4,5,6和 8 就属于一个反馈窗,表示 4,5,6,禾 P 8这四个下行子帧对应的 ACK/NACK都反馈在上行子 帧 2中。 具体的 DL_DAI取值是采用累加计数方式, 例如 eNB用三个 DL_grant调度了 子帧 4,5,6三个下行子帧给 UE, 则这三个 DL_grant中的 DL_DAI取值分别是 1,2,3。 如 果 UE只接收到子帧 4和 6对应的 DL_grant而漏检了子帧 5的 DL_grant,则 UE通过读 取这两个 DL_grant中的取值为 1和 3的 DL_DAI字段, 就会发现 DL_DAI等于 2的那 个 DL_grant被自己漏检了, 此时即使子帧 4禾 P 6的 PDSCH都接收正确, UE也不会反 馈 ACK给 eNB, 避免了出现丢掉子帧 5的数据包的错误。 而如果没有 DL_DAI, UE不 会发现子帧 5的数据包对应的 DL_grant漏检,因此如果子帧 4和 6的 PDSCH都接收正 确, UE会反馈 ACK, 这会导致帧 5的 PDSCH数据包丢失。
如果 LTE系统引入了多子帧调度, 即一个 DL_grant可以调度的下行子帧数大于 1, 那么 DL_DAI取值如何进行配置, eNB和 UE如何通过 DL_DAI的发送和接收进行信息 交互是需要解决的问题。
本发明实施例可按照下面描述的示例实施方式, 解决在多子帧调度场景下由于
DL grant的漏检而引起的丢包问题。
根据本发明的一个实施例, 基站 (例如 eNB) 向用户设备 (例如 UE) 发送下行调 度授权 DL_grant信息,该 DL_grant信息调度至少一个下行子帧的 PDSCH,上述至少一 个下行子帧属于一个或多个反馈窗。 另一方面, 用户设备接收基站发送的下行调度授权 DL_grant信息, 该 DL_grant信息调度至少一个下行子帧的 PDSCH, 上述至少一个下行 子帧属于一个或多个反馈窗, 并且用户设备根据该 DL_grant信息发送所述至少一个下 行子帧的反馈信息 (ACK/NACK信息)。
可选地, 作为一个实施例, 进一步地, 该 DL_grant信息不调度属于上述一个或多 个反馈窗的其他下行子帧的 PDSCH。 SP, 对于一个反馈窗, 基站只能用一个 DL_grant 信息进行调度。
在此情况下, 用户设备根据 DL_grant信息, 在上述一个或多个反馈窗内发送相应 的下行子帧的反馈信息。此时用户设备不考虑 DL_grant信息中的 DA_LAI的计数功能, DA_LAI可用作其他用途, 如上述实施例一至三。
具体地, 以表 1所示的 TDD上下行配置 2为例来说明:
1 ) eNB发送一个 DL_grant调度了子帧 4和 6, 即在一个反馈窗内做调度, 则对于 子帧 2这个反馈窗内的其他子帧, 子帧 5和 8, 在这个反馈周期内就不会被调度, 因此 不需要用 DL_DAI计数, 因为对于这个反馈窗, UE要么只接收到这一个 DL_grant, 要 么就漏检, 不会存在漏检一部分 DL_grant 的情况出现; 对于 UE 来说, 不会去解析 DL DAI, 如果接收到了该 DL_grant, 该 UE就会反馈子帧 4和 6对应的 ACK/NACK, 如果没有接收到, UE不会反馈 ACK/NACK, 因此不会造成丢包的错误。
2) eNB发送一个 DL_grant调度了子帧 6,8和 9, 即调度了两个反馈窗内的下行子 帧, 则对于子帧 2和 7两个反馈窗内的其他子帧, 在这个反馈周期内就不会做调度, 因 此不需要用 DL_DAI计数。
在这个实施方式中, eNB和 UE不需要用 DL_DAI进行计数, 此时 DL_DAI可以用 作 ACK/NACK 资源指示 (ARI, ACK/NACK Resource Indicator)来指示跨子帧调度的 PDSCH对应的 ACK/NACK信道资源。所谓跨子帧调度的 PDSCH, 是指调度该 PDSCH 的 DL_grant与该 PDSCH不在同一个子帧中。
此实施方式实现简单, 且不需要 DL_DAI计数, 且 DL_DAI可以用作 ARI来指示 ACK/NACK信道资源,提高了 ACK/NACK资源利用率。另夕卜,本领域技术人员很清楚, 该实施方式不限于上述上下行配置 2, 也可类似地应用于其他上下行配置, 这样的应用 落入本发明实施例的范围内。
可选地, 作为另一实施例, 进一步地, 在上述至少一个下行子帧属于一个反馈窗的 情况下, 该 DL_grant信息仅调度属于该反馈窗的下行子帧的 PDSCH。 S卩, 该 DL_grant 信息仅调度一个反馈窗内的下行子帧的 PDSCH, 而不调度属于其他反馈窗的下行子帧 的 PDSCH。
在此情况下,该 DL_grant信息包括下行分配指示 DL_DAI,用于实现与现有技术中 相同的计数功能, 具体的计数方式可以根据调度的 DL_grant 的个数来计数, 也可以根 据调度的下行子帧数或调度的 PDSCH个数来计数。
在此情况下,用户设备根据 DL_grant信息和 DL_DAI,在上述一个反馈窗内发送上 述至少一个下行子帧的反馈信息。
具体地, 以表 1所示的 TDD上下行配置 2为例来说明:
该实施方式中, 一个 DL_grant不可以调度多个反馈窗内的子帧, 如一个 DL_grant 不可以调度子帧 6,8和 9, 而只能在一个反馈窗内做调度。 例如, e B发送 DL_grantl 调度上行子帧 2的反馈窗内的子帧 4和 5, 发送 DL_grant2调度上行子帧 2的反馈窗内 的子帧 6和 8, 此时需要 DL_grant中的 DL_DAI来计数, 具体 DL_DAI取值可以按照 DL_grant的个数来计数, 也可以按照调度的下行子帧数或调度的 PDSCH个数来计数。 例如, DL grantl中的 DL_DAI1可以取值为 1(按照 DL_grant个数)或 2(按照调度的子帧 数或 PDSCH个数), DL_grant2中的 DL_DAI2可以取值为 2或 4。
此实施方式实现简单,不需要对现有系统中的 DL_DAI的计数方式进行改动。另外, 本领域技术人员很清楚, 该实施方式不限于上述上下行配置 2, 也可类似地应用于其他 上下行配置, 这样的应用落入本发明实施例的范围内。
可选地, 作为另一实施例, 进一步地, 在上述至少一个下行子帧属于多个反馈窗的 情况下, 该 DL_grant信息调度该至少一个下行子帧的 PDSCH。 上述多个反馈窗内的其 他下行子帧的 PDSCH由一个或多个其他 DL_grant信息调度。即对于一个反馈窗内的不 同下行子帧, 基站可以分别用多个 DL_grant来调度, 且可以跨多个反馈窗来调度。 在此情况下, 基站在配置 DL_DAI的取值时考虑 DL_grant跨多个反馈窗的调度。 具体地, 基站在对调度一个反馈窗的 DL_grant信息中的 DL_DAI取值进行配置时, 基 于该反馈窗内的其他没有被该 DL_grant 调度到的下行子帧是否被调度其它反馈窗的 DL_grant所调度。 在该反馈窗内的其他没有被该 DL_grant调度到的下行子帧未被调度 其它反馈窗的 DL_grant所调度时, DL DAI的取值不依赖于其他 DL_grant的 DL_DAI, 即可独立配置。 另一方面, 在该反馈窗内的其他没有被该 DL_grant调度到的下行子帧 被调度其它反馈窗的 DL_grant所调度时, DL_DAI的取值依赖于上述调度其它反馈窗的 DL_grant的调度信息, 该调度信息包括上述调度其它反馈窗的 DL_grant调度该反馈窗 内的下行子帧的个数。 可选地, 上述该反馈窗内的其他没有被该 DL_grant调度到的下 行子帧是该反馈窗内的且时刻在被该 DL_grant所调度到的下行子帧之前的下行子帧。 具体 DL_DAI的计数方式是基于包含该 DL_DAI的 DL_grant所在的子帧所在的反馈窗 内当前已经被调度的 PDSCH个数来计数, 或者基于当前已经调度该反馈窗内的下行子 帧的 DL_grant个数来计数。
相应地,用户设备根据 DL_grant信息和 DL_DAI,在上述多个反馈窗内发送上述相 应的下行子帧的反馈信息。其中, 用户设备在反馈 ACK/NACK时考虑 DL_grant跨多个 反馈窗的调度, 即需要考虑上述 DL_DAI的配置规则。 具体地, 以计数方式根据当前反 馈窗内的子帧被调度的 PDSCH个数这种方式为例进行说明, 如果 UE读取到 DL_grant 中的 DL_DAI的取值与当前反馈窗内被调度的下行子帧的总数一致时, 则该 UE根据当 前反馈窗内收到的 PDSCH的正确与否反馈 ACK/NACK;如果 UE读取到 DL_DAI的取 值与当前反馈窗内被调度的下行子帧的总数不一致时, 则该 UE根据不会反馈 ACK, 具 体地, UE 可以不反馈任何信息, 或 UE 在该反馈窗内未收到 PDSCH 的子帧的 ACK/NACK反馈位置映射码字 NACK来反馈。
其他 DL_DAI计数和配置方式也不排除,比如 DL_DAI的计数方式还可以是基于包 含该 DL_DAI的 DL_grant所在的子帧所在的反馈窗内当前已经被调度的 PDSCH个数, 加上包含该 DL_DAI的 DL_grant所调度的其他反馈窗内的 PDSCH个数。
具体地, 以表 1所示的 TDD上下行配置 2为例来说明。 图 7是本发明一个实施例 的 DL_grant调度下行子帧的 PDSCH的例子的示意图。
图 7的例子中, 一个 DL_grant可以调度多个反馈窗内的子帧, 且对于一个反馈窗 内的不同子帧可以分别用多个 DL_grant来调度。 因此, e B对 DL_DAI取值的配置要 考虑 DL_grant 可以跨不同的反馈窗调度的情况。 具体地, eNB 对调度一个反馈窗的 DL_grant中的 DL_DAI配置, 要考虑该反馈窗内的其它没有被该 DL_grant调度到的下 行子帧是否被调度其它反馈窗的 DL_grant所调度, 相应的 UE确定 ACK/NACK反馈时 也要用到上述 DAI的配置规则。例如, e B发送 DL_grantl调度上行子帧 2的反馈窗内 的子帧 5和 6, 发送 DL_grant2调度上行子帧 2的反馈窗内的子帧 8和上行子帧 7的反 馈窗内的子帧 9, 发送 DL_grant3调度上行子帧 7的反馈窗内的子帧 0和 1, 此时需要 DL grant中的 DL_DAI来计数, 具体 DL_DAI计数以基于包含该 DL_DAI的 DL_grant 所在的子帧所在的反馈窗内当前已经被调度的 PDSCH个数来计数。 例如, DL_grantl 中的 DL_DAI1可以取值为 2, 表示该反馈窗当前被调度了子两个子帧 5,6的 PDSCH。 相应地, DL_grant2 中的 DL_DAI2取值为 3, 表示当前被调度了子三个子帧 5,6,8 的 PDSCH (需要参考 DL_DAI1的计数), 而 DL_grant3中的 DL_DAD取值为 3, 因为不 但需要包括当前 DL_grant3调度的两个子帧 0,1的 PDSCH,还需要包括该反馈窗内的时 刻在子帧 0,1之前的子帧 9被 DL_grant2调度的情况。
此实施方式调度灵活,没有调度限制,且 eNB和 UE通过对 DL_DAI的配置和解析, 避免了由于没有 DL_DAI计数而造成的丢包。 另外, 本领域技术人员很清楚, 该实施方 式不限于上述上下行配置 2的具体调度例子,也可类似地应用于其他上下行配置和 /或其 他调度方式, 这样的应用落入本发明实施例的范围内。
根据上述实施方式, 本发明实施例解决了在多子帧调度场景下由于 DL_grant 的漏 检而引起的丢包问题。
图 8是本发明另一实施例的基站的框图。 基站 80包括生成单元 81和发送单元 82。 生成单元 81生成下行调度授权 DL_grant信息,该 DL_grant信息调度至少一个下行 子帧的 PDSCH, 上述至少一个下行子帧属于一个或多个反馈窗。 可选地, 该 DL_grant 信息不调度属于上述一个或多个反馈窗的其他下行子帧的 PDSCH。 或者可选地, 在上 述至少一个下行子帧属于一个反馈窗的情况下, 该 DL_grant信息仅调度属于该反馈窗 的下行子帧的 PDSCH。 或者可选地, 在上述至少一个下行子帧属于多个反馈窗的情况 下,上述多个反馈窗内的其他下行子帧的 PDSCH由一个或多个其他 DL_grant信息调度。
发送单元 82向用户设备发送该 DL_grant信息。
这样, 本发明实施例解决了在多子帧调度场景下由于 DL_grant 的漏检而引起的丢 包问题。
具体地, 在该 DL_grant信息不调度属于上述一个或多个反馈窗的其他下行子帧的 PDSCH的情况下。 对于一个反馈窗, 基站只能用一个 DL_grant信息进行调度。 如上所 述, 此实施方式实现简单, 且不需要 DL_DAI计数, 且 DL_DAI可以用作 ARI来指示 ACK/NACK信道资源, 提高了 ACK/NACK资源利用率。
另外, 在上述至少一个下行子帧属于一个反馈窗的情况下, 该 DL_grant信息仅调 度属于该反馈窗的下行子帧的 PDSCH。 SP, 该 DL_grant信息仅调度一个反馈窗内的下 行子帧的 PDSCH, 而不调度属于其他反馈窗的下行子帧的 PDSCH。 在此情况下, 该 DL_grant信息包括下行分配指示 DL_DAI, 用于实现与现有技术中相同的计数功能, 具 体的计数方式可以根据调度的 DL_grant 的个数来计数, 也可以根据调度的下行子帧数 或调度的 PDSCH个数来计数。 此实施方式实现简单, 不需要对现有系统中的 DL_DAI 的计数方式进行改动。
此外, 在上述至少一个下行子帧属于多个反馈窗的情况下, 该 DL_grant信息调度 该至少一个下行子帧的 PDSCH。上述多个反馈窗内的其他下行子帧的 PDSCH由一个或 多个其他 DL_grant信息调度。 即对于一个反馈窗内的不同下行子帧, 基站可以分别用 多个 DL_grant来调度, 且可以跨多个反馈窗来调度。在此情况下, 基站在配置 DL_DAI 的取值时考虑 DL_grant跨多个反馈窗的调度。 此实施方式调度灵活, 没有调度限制, 且 e B和 UE通过对 DL_DAI的配置和解析, 避免了由于没有 DL_DAI计数而造成的 丢包。
基站 80的各个单元的具体操作可参照上面的方法实施例所述, 未避免重复, 不再 详细描述。
图 9是本发明另一实施例的用户设备的框图, 图 9的用户设备 90包括接收单元 91 和反馈单元 92。
接收单元 91接收基站发送的下行调度授权 DL_grant信息,该 DL_grant信息调度至 少一个下行子帧的 PDSCH, 上述至少一个下行子帧属于一个或多个反馈窗。 可选地, 该 DL_grant信息不调度属于上述一个或多个反馈窗的其他下行子帧的 PDSCH。 或者可 选地, 在上述至少一个下行子帧属于一个反馈窗的情况下, 该 DL_grant信息仅调度属 于该反馈窗的下行子帧的 PDSCH。 或者可选地, 在上述至少一个下行子帧属于多个反 馈窗的情况下, 上述多个反馈窗内的其他下行子帧的 PDSCH 由一个或多个其他 DL_grant信息调度。
反馈单元 92 根据该 DL_grant 信息发送上述至少一个下行子帧的反馈信息 (ACK/NACK信息)。
这样, 本发明实施例解决了在多子帧调度场景下由于 DL_grant 的漏检而引起的丢 包问题。
具体地, 在该 DL_grant信息不调度属于上述一个或多个反馈窗的其他下行子帧的 PDSCH的情况下。 对于一个反馈窗, 基站只能用一个 DL_grant信息进行调度。 此时, 反馈单元 92根据 DL_grant信息, 在上述一个或多个反馈窗内发送相应的下行子帧的反 馈信息。 如上所述, 此实施方式实现简单, 且不需要 DL_DAI计数, 且 DL_DAI可以用 作 ARI来指示 ACK/NACK信道资源, 提高了 ACK/NACK资源利用率。
另外, 在上述至少一个下行子帧属于一个反馈窗的情况下, 该 DL_grant信息仅调 度属于该反馈窗的下行子帧的 PDSCH。 SP, 该 DL_grant信息仅调度一个反馈窗内的下 行子帧的 PDSCH, 而不调度属于其他反馈窗的下行子帧的 PDSCH。 在此情况下, 该 DL_grant信息包括下行分配指示 DL_DAI, 用于实现与现有技术中相同的计数功能, 具 体的计数方式可以根据调度的 DL_grant 的个数来计数, 也可以根据调度的下行子帧数 或调度的 PDSCH个数来计数。 此时, 反馈单元 92根据 DL_grant信息和 DL_DAI, 在 上述一个反馈窗内发送上述至少一个下行子帧的反馈信息。 此实施方式实现简单, 不需 要对现有系统中的 DL_DAI的计数方式进行改动。
此外, 在上述至少一个下行子帧属于多个反馈窗的情况下, 该 DL_grant信息调度 该至少一个下行子帧的 PDSCH。上述多个反馈窗内的其他下行子帧的 PDSCH由一个或 多个其他 DL_grant信息调度。 即对于一个反馈窗内的不同下行子帧, 基站可以分别用 多个 DL_grant来调度, 且可以跨多个反馈窗来调度。 在此情况下, 反馈单元 92根据 DL_grant信息和 DL_DAI, 在上述多个反馈窗内发送上述相应的下行子帧的反馈信息。 其中, 反馈单元 92在反馈 ACK/NACK时考虑 DL_grant跨多个反馈窗的调度, 即需要 考虑上述 DL_DAI的配置规则。 此实施方式调度灵活, 没有调度限制, 且 e B和 UE 通过对 DL_DAI的配置和解析, 避免了由于没有 DL_DAI计数而造成的丢包。
用户设备 90的各个单元的具体操作可参照上面的方法实施例所述, 未避免重复, 不再详细描述。
根据本发明实施例的通信系统可包括上述基站 80或用户设备 90。
现有非多子帧调度的 TDD系统中, 如果 UE只收到一个反馈窗内的 DL_grant调度 且该 DL_grant中的 DL_DAI为 1, 则该 UE的当前反馈窗内需要反馈的 ACK/NACK资 源由该 DL_grant所占的控制信道单元 (CCE)标号来隐式对应; 如果 UE收到一个反馈窗 内的 DL_grant调度且该 DL_grant中的 DL_DAI大于 1, 则该 UE的当前反馈窗内需要 反馈的 ACK/NACK 在无线资源控制(Radio Resource Control , RRC)信令配置的 ACK/NACK资源上反馈。
如果引入跨子帧调度, 跨不同反馈窗调度的 ACK/NACK资源分配是一个待解决的 问题。
UE接收基站发送的至少一个 DL_grant, 该至少一个 DL_grant分别调度了该 UE的 至少一个子帧的 PDSCH传输;
如果该 UE根据该至少一个 DL_grant中的 DL_DAI确定一个反馈窗内只被调度了 一个子帧的 PDSCH, 且调度该 PDSCH的第一 DL_grant发送在该反馈窗内, 则该 UE 在该第一 DL_grant所占的控制信道单元 (CCE)标号所对应的 ACK/NACK信道资源上反 馈该反馈窗内的 ACK/NACK;
如果该 UE根据该至少一个 DL_grant中的 DL_DAI确定一个反馈窗内被调度了多 于一个子帧的 PDSCH, 则该 UE在 RRC配置的 ACK/NACK信道资源上反馈该反馈窗 内的 ACK/NACK。
UE如何根据 DL_DAI的取值来判断反馈窗内的被调度的 PDSCH的个数由上述实 施例的方案解决。
可选地, 如果第一反馈窗内的一个 DL_grant 同时调度了第一反馈窗和第二反馈窗 内的 PDSCH, 且该 UE需要在 RRC配置的 ACK/NACK信道资源上反馈 ACK/NACK, 则该 UE在相同的 RRC配置的 ACK/NACK信道资源上分别反馈该第一和第二反馈窗对 应的 ACK/NACK。
相应地, 基站侧方法可以描述为:
基站给 UE调度了至少一个 DL_grant,该至少一个 DL_grant分别调度了该 UE的至 少一个子帧的 PDSCH传输;
如果该基站根据该至少一个 DL_grant中的 DL_DAI确定一个反馈窗内只被调度了 一个子帧的 PDSCH, 且调度该 PDSCH的第一 DL_grant发送在该反馈窗内, 则该基站 在该第一 DL_grant所占的控制信道单元 (CCE)标号所对应的 ACK/NACK信道资源上接 收该 UE反馈的该反馈窗内的 ACK/NACK;
如果该基站根据该至少一个 DL_grant中的 DL_DAI确定一个反馈窗内被调度了多 于一个子帧的 PDSCH, 则该基站在 RRC配置的 ACK/NACK信道资源上接收该 UE反 馈的该反馈窗内的 ACK/NACK。
可选地, 如果第一反馈窗内的一个 DL_grant 同时调度了第一反馈窗和第二反馈窗 内的 PDSCH, 且该基站需要在 RRC配置的 ACK/NACK信道资源上接收 ACK/NACK, 则该基站在相同的 RRC配置的 ACK/NACK信道资源上分别接收该 UE反馈的该第一和 第二反馈窗对应的 ACK/NACK。
一个实施例, 以表 1所示的 TDD上下行配置 2为例来说明。 假设子帧 8上发送 DL grantl调度了子帧 8和 9的两个 PDSCH, 子帧 0上发送 DL_grant2调度了子帧 0和 1的两个 PDSCH,根据上述实施例中的 DL_DAI的配置方法, DL grantl中的 DL_DAI1 配置为 1, DL_grant2中的 DL_DAI2配置为 3, UE根据上述 DL_DAI的取值可以判断 出子帧 2的反馈窗内只被调度了一个子帧 8的 PDSCH, 且调度该子帧 8的 DL_grantl 也在该反馈窗内(子帧 8 上;), 因此 UE 在该 DL_grantl 所占的 CCE 标号所对应的 ACK/NACK信道资源上反馈该子帧 2的反馈窗内的 ACK/NACK; UE还可以判断出子 帧 7的反馈窗内被调度了三个 PDSCH, 则该 UE在 RRC配置的 ACK/NACK信道资源 上反馈该子帧 7的反馈窗内的 ACK/NACK。该方案降低了 ACK/NACK的资源开销,保 持了 ACK/NACK反馈对于现有系统的后相兼容性。
另一个实施例, 以表 1所示的 TDD上下行配置 2为例来说明。 假设子帧 4上发送 DL grantl调度了子帧 4和 5的两个 PDSCH, 子帧 8上发送 DL_grant2调度了子帧 8和 9的两个 PDSCH, 子帧 0上发送 DL_grant3调度了子帧 0和 1的两个 PDSCH, 根据上 述实施例中的 DL_DAI的配置方法, DL_grantl中的 DL_DAI1配置为 2, DL_grant2中 的 DL_DAI2配置为 3, DL_grant2中的 DL_DAI2配置为 3, UE根据上述 DL_DAI的取 值可以判断出子帧 2的反馈窗内被调度了 3个 PDSCH, 还可以判断出子帧 7的反馈窗 内被调度了 3个 PDSCH, 因此该 UE都需要在 RRC配置的 ACK/NACK信道资源上分 别反馈该子帧 2和子帧 7的两个反馈窗内的 ACK/NACK。 又由于子帧 2的反馈窗内的 DL_grant2同时调度了这两个反馈窗内的子帧 (8和 9),因此该 UE在相同的 RRC配置的 ACK/NACK信道资源上分别反馈该子帧 2和子帧 7的反馈窗对应的 ACK/NACK。该方 案实现较为简单,且两个反馈窗的 ACK/NACK信道资源不会由于多个 RRC配置的不同 ACK/NACK资源而使得 UE错误选择 ACK/NACK信道资源。
本领域普通技术人员可以意识到, 结合本文中所公开的实施例描述的各示例的单元 及算法步骤, 能够以电子硬件、 或者计算机软件和电子硬件的结合来实现。 这些功能究 竟以硬件还是软件方式来执行, 取决于技术方案的特定应用和设计约束条件。 专业技术 人员可以对每个特定的应用来使用不同方法来实现所描述的功能,但是这种实现不应认 为超出本发明的范围。
所属领域的技术人员可以清楚地了解到, 为描述的方便和简洁, 上述描述的系统、 装置和单元的具体工作过程, 可以参考前述方法实施例中的对应过程, 在此不再赘述。 在本申请所提供的几个实施例中, 应该理解到, 所揭露的系统、 装置和方法, 可以 通过其它的方式实现。 例如, 以上所描述的装置实施例仅仅是示意性的, 例如, 所述单 元的划分, 仅仅为一种逻辑功能划分, 实际实现时可以有另外的划分方式, 例如多个单 元或组件可以结合或者可以集成到另一个系统, 或一些特征可以忽略, 或不执行。 另一 点, 所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口, 装置 或单元的间接耦合或通信连接, 可以是电性, 机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的, 作为单元显示 的部件可以是或者也可以不是物理单元, 即可以位于一个地方, 或者也可以分布到多个 网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的 目的。
另外, 在本发明各个实施例中的各功能单元可以集成在一个处理单元中, 也可以是 各个单元单独物理存在, 也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时,可以存 储在一个计算机可读取存储介质中。 基于这样的理解, 本发明的技术方案本质上或者说 对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来, 该 计算机软件产品存储在一个存储介质中, 包括若干指令用以使得一台计算机设备(可以 是个人计算机, 服务器, 或者网络设备等)执行本发明各个实施例所述方法的全部或部 分步骤。 而前述的存储介质包括: U 盘、 移动硬盘、 只读存储器 (ROM, Read-Only Memory ) 随机存取存储器 (RAM, Random Access Memory ) 磁碟或者光盘等各种可 以存储程序代码的介质。
以上所述, 仅为本发明的具体实施方式, 但本发明的保护范围并不局限于此, 任何 熟悉本技术领域的技术人员在本发明揭露的技术范围内, 可轻易想到变化或替换, 都应 涵盖在本发明的保护范围之内。 因此, 本发明的保护范围应所述以权利要求的保护范围 为准。

Claims

权利要求
1、 一种通信方法, 其特征在于, 包括:
在一个子帧中向用户设备发送物理下行控制信道 PDCCH, 所述 PDCCH用于调度 所述用户设备的至少两个子帧的物理下行共享信道 PDSCH的传输, 并且所述 PDCCH 携带第一指示信息, 所述第一指示信息指示用于传输与所述 PDSCH对应的上行确认 / 不确认 ACK/NACK信息的信道资源;
确定携带所述 PDSCH对应的上行 ACK/NACK信息的传输子帧, 在所述传输子帧 中的所述信道资源上接收所述上行 ACK/NACK信息。
2、如权利要求 1所述的通信方法, 其特征在于, 所述 PDSCH采用预配置的冗余版 本。
3、 如权利要求 2所述的通信方法, 其特征在于, 还包括: 向所述用户设备通知所 述预配置的冗余版本。
4、 如权利要求 1-3任一项所述的通信方法, 其特征在于, 所述 PDCCH用于调度至 少两个子帧的 PDSCH的传输, 包括:
所述 PDCCH携带子帧指示域 SIF信息, 所述 SIF信息用于指示所调度的所述至少 两个子帧; 或者,
所述 PDCCH携带 SIF信息和新数据指示 DI信息,所述 SIF信息和 DI信息用于 联合指示所调度的所述至少两个子帧。
5、 如权利要求 1-4任一项所述的通信方法, 其特征在于, 所述 PDCCH携带用于传 输与所述 PDSCH对应的上行 ACK/NACK信息的信道资源的第一指示信息, 包括: 所述 PDSCH 中的与所述 PDCCH 在相同子帧上的 PDSCH 所对应的上行 ACK/NACK信息的信道资源的第一指示信息为所述 PDCCH的控制信道单元 CCE标号; 所述 PDSCH中的与所述 PDCCH不在相同子帧上的 PDSCH所对应的上行 ACK/NACK 信息的信道资源的第一指示信息为所述 PDCCH中的 ACK/NACK资源指示 ARI;或者, 所述 PDSCH 对应的上行 ACK/NACK 信息的信道资源的第一指示信息为所述 PDCCH中的 ARI。
6、 如权利要求 5所述的通信方法, 其特征在于, 所述 ARI为所述 PDCCH中的特 定比特或扰码。
7、 如权利要求 6所述的通信方法, 其特征在于, 所述特定比特为所述冗余版本中 的全部或部分比特, 和 /或所述 DI的一个比特, 和 /或下行分配指示 DAI中的全部或部 分比特。
8、 如权利要求 1-7任一项所述的通信方法, 其特征在于, 还包括:
所述 PDCCH还用于调度所述用户设备的一个或多个子帧的重传 PDSCH的传输, 并且所述 PDCCH携带用于传输与所述重传 PDSCH对应的上行 ACK/NACK信息的信道 资源的第二指示信息,
所述第二指示信息为所述 PDCCH的 CCE标号或 ARL 或重用所述第一指示信息。
9、 如权利要求 8所述的通信方法, 其特征在于, 所述 PDCCH还用于调度所述用 户设备的一个或多个子帧的重传 PDSCH的传输, 包括:
所述 PDCCH携带 DI信息, 所述 DI信息用于指示所调度的所述一个或多个子 帧; 或者,
所述 PDCCH携带 SIF信息和 NDI信息,所述 SIF信息和 DI信息用于联合指示所 调度的所述一个或多个子帧。
10、 一种通信方法, 其特征在于, 包括:
在一个子帧中接收基站发送的物理下行控制信道 PDCCH, 所述 PDCCH用于调度 用户设备的至少两个子帧的物理下行共享信道 PDSCH的传输, 并且所述 PDCCH携带 第一指示信息,所述第一指示信息指示用于传输与所述 PDSCH对应的上行确认 /不确认 ACK/NACK信息的信道资源;
确定携带所述 PDSCH对应的上行 ACK/NACK信息的传输子帧, 在所述传输子帧 中的所述信道资源上发送所述上行 ACK/NACK信息。
11、如权利要求 10所述的通信方法, 其特征在于, 所述 PDSCH采用预配置的冗余 版本。
12、 如权利要求 11 所述的通信方法, 其特征在于, 还包括: 接收所述基站对于所 述预配置的冗余版本的通知。
13、 如权利要求 10-12任一项所述的通信方法, 其特征在于, 所述 PDCCH用于调 度至少两个子帧的 PDSCH的传输, 包括:
所述 PDCCH携带子帧指示域 SIF信息, 所述 SIF信息用于指示所调度的所述至少 两个子帧; 或者,
所述 PDCCH携带 SIF信息和新数据指示 DI信息,所述 SIF信息和 DI信息用于 联合指示所调度的所述至少两个子帧。
14、 如权利要求 10-13任一项所述的通信方法, 其特征在于, 所述 PDCCH携带用 于传输与所述 PDSCH对应的上行 ACK/NACK信息的信道资源的第一指示信息, 包括: 所述 PDSCH 中的与所述 PDCCH 在相同子帧上的 PDSCH 所对应的上行 ACK/NACK信息的信道资源的第一指示信息为所述 PDCCH的控制信道单元 CCE标号; 所述 PDSCH中的与所述 PDCCH不在相同子帧上的 PDSCH所对应的上行 ACK/NACK 信息的信道资源的第一指示信息为所述 PDCCH中的 ACK/NACK资源指示 ARI;或者, 所述 PDSCH 对应的上行 ACK/NACK 信息的信道资源的第一指示信息为所述 PDCCH中的 ARI。
15、 如权利要求 14所述的通信方法, 其特征在于, 所述 ARI为所述 PDCCH中的 特定比特或扰码。
16、 如权利要求 15所述的通信方法, 其特征在于, 所述特定比特为所述冗余版本 中的全部或部分比特, 和 /或所述 NDI的一个比特, 和 /或下行分配指示 DAI中的全部或 部分比特。
17、 如权利要求 10-16任一项所述的通信方法, 其特征在于, 还包括:
所述 PDCCH还用于调度所述用户设备的一个或多个子帧的重传 PDSCH的传输, 并且所述 PDCCH携带用于传输与所述重传 PDSCH对应的上行 ACK/NACK信息的信道 资源的第二指示信息,
所述第二指示信息为所述 PDCCH的 CCE标号或 ARL 或重用所述第一指示信息。
18、 如权利要求 17所述的通信方法, 其特征在于, 所述 PDCCH还用于调度所述 用户设备的一个或多个子帧的重传 PDSCH的传输, 包括:
所述 PDCCH携带 DI信息, 所述 DI信息用于指示所调度的所述一个或多个子 帧; 或者,
所述 PDCCH携带 SIF信息和 NDI信息,所述 SIF信息和 DI信息用于联合指示所 调度的所述一个或多个子帧。
19、 一种基站, 其特征在于, 包括:
信道发送单元, 用于在一个子帧中向用户设备发送物理下行控制信道 PDCCH, 所 述 PDCCH用于调度所述用户设备的至少两个子帧的物理下行共享信道 PDSCH的传输, 并且所述 PDCCH携带第一指示信息, 所述第一指示信息指示用于传输与所述 PDSCH 对应的上行确认 /不确认 ACK/NACK信息的信道资源;
信息接收单元, 用于确定携带所述 PDSCH对应的上行 ACK/NACK信息的传输子 帧, 在所述传输子帧中的所述信道资源上接收所述上行 ACK/NACK信息。
20、如权利要求 19所述的基站,其特征在于,所述 PDSCH采用预配置的冗余版本。
21、如权利要求 19或 20所述的基站,其特征在于,所述信道发送单元发送的 PDCCH 携带子帧指示域 SIF信息, 所述 SIF信息用于指示所调度的所述至少两个子帧; 或者, 所述信道发送单元发送的 PDCCH携带 SIF信息和新数据指示 DI信息, 所述 SIF 信息和 DI信息用于联合指示所调度的所述至少两个子帧。
22、如权利要求 19或 20所述的基站,其特征在于,所述信道发送单元发送的 PDCCH 所调度的 PDSCH中,与所述 PDCCH在相同子帧上的 PDSCH所对应的上行 ACK/NACK 信息的信道资源的第一指示信息为所述 PDCCH的控制信道单元 CCE标号;所述信道发 送单元发送的 PDCCH所调度的 PDSCH中, 与所述 PDCCH不在相同子帧上的 PDSCH 所对应的上行 ACK/NACK 信息的信道资源的第一指示信息为所述 PDCCH 中的 ACK/NACK资源指示 ARI; 或者, 所述 PDSCH对应的上行 ACK/NACK信息的信道资 源的第一指示信息为所述 PDCCH中的 ARL
所述 ARI为所述 PDCCH中的特定比特或扰码,所述特定比特为所述冗余版本中的 全部或部分比特, 和 /或所述 DI的一个比特, 和 /或下行分配指示 DAI中的全部或部分 比特。
23、 一种用户设备, 其特征在于, 包括:
信道接收单元, 用于在一个子帧中接收基站发送的物理下行控制信道 PDCCH, 所 述 PDCCH用于调度用户设备的至少两个子帧的物理下行共享信道 PDSCH的传输, 并 且所述 PDCCH携带第一指示信息, 所述第一指示信息指示用于传输与所述 PDSCH对 应的上行确认 /不确认 ACK/NACK信息的信道资源;
信息发送单元, 用于确定携带所述 PDSCH对应的上行 ACK/NACK信息的传输子 帧, 在所述传输子帧中的所述信道资源上发送所述上行 ACK/NACK信息。
24、如权利要求 23所述的用户设备, 其特征在于, 所述 PDSCH采用预配置的冗余 版本。
25、 如权利要求 23或 24所述的用户设备, 其特征在于, 所述信道接收单元接收的 PDCCH携带子帧指示域 SIF信息, 所述 SIF信息用于指示所调度的所述至少两个子帧; 或者,
所述信道接收单元接收的 PDCCH携带 SIF信息和新数据指示 DI信息, 所述 SIF 信息和 DI信息用于联合指示所调度的所述至少两个子帧。
26、 如权利要求 23或 24所述的用户设备, 其特征在于, 所述信道接收单元接收的 PDCCH所调度的 PDSCH中, 与所述 PDCCH在相同子帧上的 PDSCH所对应的上行 ACK/NACK信息的信道资源的第一指示信息为所述 PDCCH的控制信道单元 CCE标号; 所述信道接收单元接收的 PDCCH所调度的 PDSCH中, 与所述 PDCCH不在相同子帧 上的 PDSCH所对应的上行 ACK/NACK信息的信道资源的第一指示信息为所述 PDCCH 中的 ACK/NACK资源指示 ARI; 或者, 所述 PDSCH对应的上行 ACK/NACK信息的信 道资源的第一指示信息为所述 PDCCH中的 ARI,
所述 ARI为所述 PDCCH中的特定比特或扰码,所述特定比特为所述冗余版本中的 全部或部分比特, 和 /或所述 DI的一个比特, 和 /或下行分配指示 DAI中的全部或部分 比特。
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US20140321382A1 (en) 2014-10-30
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EP2785131A1 (en) 2014-10-01
CN103179672B (zh) 2016-03-02
CN103179672A (zh) 2013-06-26

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