WO2012051904A1 - Ack/nack反馈信息的传输方法和设备 - Google Patents

Ack/nack反馈信息的传输方法和设备 Download PDF

Info

Publication number
WO2012051904A1
WO2012051904A1 PCT/CN2011/080427 CN2011080427W WO2012051904A1 WO 2012051904 A1 WO2012051904 A1 WO 2012051904A1 CN 2011080427 W CN2011080427 W CN 2011080427W WO 2012051904 A1 WO2012051904 A1 WO 2012051904A1
Authority
WO
WIPO (PCT)
Prior art keywords
ack
nack feedback
downlink
terminal device
component carrier
Prior art date
Application number
PCT/CN2011/080427
Other languages
English (en)
French (fr)
Inventor
高雪娟
沈祖康
林亚男
Original Assignee
电信科学技术研究院
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 电信科学技术研究院 filed Critical 电信科学技术研究院
Priority to EP23170302.6A priority Critical patent/EP4228183A1/en
Priority to KR1020127031277A priority patent/KR101447067B1/ko
Priority to JP2013519954A priority patent/JP5523631B2/ja
Priority to US13/703,629 priority patent/US8902784B2/en
Priority to EP11833810.2A priority patent/EP2632070B1/en
Publication of WO2012051904A1 publication Critical patent/WO2012051904A1/zh

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements 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
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements 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
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1858—Transmission or retransmission of more than one copy of acknowledgement message
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements 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
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1861—Physical mapping arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0055—Physical resource allocation for ACK/NACK

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method and a device for transmitting ACK/NACK feedback information. Background technique
  • LTE-A Long Term Evolution Advanced
  • LTE Long Term Evolution Advanced
  • M 1 carrier for uplink transmission
  • the LTE-A system is currently configured to support up to five carriers for aggregation.
  • One LTE-A terminal device (User Equipment, UE) needs to feed back ACKs corresponding to multiple downlink carriers and downlink subframes in the same uplink subframe.
  • a PUCCH (Physical Uplink Control Channel) Format lb with channel selection transmission scheme can be used for no more than 4 bits of ACK/NACK feedback information, for FDD (Frequency Division Duplex)
  • FDD Frequency Division Duplex
  • the channel resource performs selective transmission to distinguish different ACK/NACK feedback information states, wherein the ACK/NAK mapping table is used to implement the ACK/NACK feedback information to be fed back and the actual channel transmission information (ie, 4 PUCCH format lb QPSK modulation). Constellation point) and mapping of transport channels. For 2, 3, and 4 bits of ACK/NACK feedback, 2, 3, and 4 uplink control channel resources are required, respectively.
  • the channel resources used when transmitting ACK/NACK using PUCCH Format lb with channel selection are all implicit channel resources.
  • the implicit channel resource is an uplink control channel resource reserved for a control information area of a fixed downlink carrier on an uplink carrier, where a minimum unit of the control information area is a CCE (Control Channel Element), the terminal
  • the device can calculate an available uplink control channel resource by using the lowest CCE number of each downlink control signaling sent on the downlink carrier, and the device refers to the resource as "implicit channel resource" or "dynamic channel resource”. .
  • the reservation of the implicit channel resource on each UL CC is only for the PDCCH on the downlink DL CC (downlink component carrier).
  • the Physical Downlink Control Channel (physical downlink control channel) is reserved, and the PUCCH can only be transmitted on the Uplink Primary Component Carrier (ULC). Therefore, for a terminal device, the implicit channel resource is only in the UL.
  • the UL PCC only reserves resources for the DL PCC (Downlink Primary Component Carrier). Only the PDCCH transmitted on the DL PCC has implicit channel resources. Therefore, the PUCCH format lb with The channel resources required for channel selection may not all be obtained from implicit channel resources.
  • the base station transmits the downlink data of one subframe only in the DL PCC; or the UE configures multiple DL CCs, but the base station only schedules one subframe of the data packet on the DL PCC), and can fall back to the PUCCH in the LTE Rel-8.
  • Format la/lb transmission mode that is, the QPSK constellation point and channel resource used for transmitting ACK/NACK in the PUCCH format lb with channel selection scheme in this case, corresponding to a data packet on the primary carrier using PUCCH format la/lb transmission
  • the QPSK modulation symbols (or constellation points) used by the ACK/NACK are consistent with the channel resources.
  • the eNB schedules only one codeword on the DL PCC, and the eNB expects to use PUCCH format la on the UL PCC (FDD system: single codeword transmission or multicode Word transmission but only one codeword scheduling exists; or TDD system: single codeword transmission or multicodeword transmission but only one codeword scheduling exists)
  • FDD system single codeword transmission or multicode Word transmission but only one codeword scheduling exists
  • TDD system single codeword transmission or multicodeword transmission but only one codeword scheduling exists
  • Receive 1-bit ACK/NACK feedback information or use PUCCH format lb (FDD system: multiple The codeword is transmitted and two codewords are scheduled at the same time; or the TDD system: multi-codeword transmission and simultaneously scheduling 2 codewords) receiving 2-bit ACK/NACK feedback information.
  • the terminal device will work in the 2DL CC configuration.
  • the ACK/NACK feedback bit will still be generated according to the 2CC configuration and transmitted on the UL PCC using the PUCCH format lb with channel selection scheme.
  • ACK/NACK feedback information If the QPSK modulation symbol and the transmission channel determined by the UE after channel selection are inconsistent with the PUCCH format la/lb, the eNB cannot correctly receive the ACK/NACK information.
  • the terminal device configures the DL CC to increase from 1 CC When it comes to 2 CCs, there is also the above problem of inconsistency.
  • Case 2 When the UE is configured with multiple DL CCs, but the eNB only has scheduling on the DL PCC, there is an inconsistency between the eNB and the terminal device to understand the actual transmission scheme of the terminal device.
  • the eNB schedules only one subframe of packet transmission at the DL PCC, and therefore expects to use PUCCH format la / lb reception (scheduling multi-codeword) ACK/NACK feedback information on the UL PCC.
  • the UE since the UE configuration works in 2 DL CCs, the UE generates an ACK/NACK feedback bit according to the 2CC configuration regardless of whether the UE actually receives the data packet in several DL CCs, and uses the PUCCH format lb with channel on the UL PCC.
  • the selection scheme transmits ACK/NACK feedback information. If the QPSK modulation symbol and the transmission channel determined by the UE after the channel selection are inconsistent with the PUCCH format la/lb, the eNB cannot correctly receive the ACK/NACK information.
  • the DL PCC of the portion with the background color is the mapping mode in the multi-codeword mode.
  • the four states with the background color can be supported. Fallback of PUCCH format lb (ie QPSK symbol and selected channel are consistent with PUCCH format lb), but cannot support backoff of PUCCH format la (ie QPSK symbol and selected channel are inconsistent with PUCCH format la);
  • the DL PCC is a mapping mode in the single codeword mode. In this case, the two states in bold can support the backoff of the PUCCH format la (ie, the QPSK symbol and the selected channel are consistent with the PUCCH format la).
  • the DL PCC is a mapping mode in the multi-codeword mode.
  • the four states of the bold can support the fallback of the PUCCH format lb (ie, QPSK symbol and selected channel and PUCCH format lb Consistent); but cannot support the fallback of PUCCH format la (ie, the QPSK symbol and the selected channel are inconsistent with PUCCH format la).
  • the feedback information status of the terminal equipment to a downlink carrier includes ACK (correctly received data packet), NACK (error received data packet), and DTX (discontinuous transmission, that is, a lost or unscheduled data packet).
  • the transmission mode (ie, the number of codewords) of different downlink carriers may be different, and N is the number of downlink carriers configured for the terminal equipment.
  • a DL CC when a DL CC is in a multi-codeword transmission mode, that is, a MIMO (Multiple-Input Multiple-Out-put) transmission mode, the terminal device needs to separately generate a 1-bit ACK for each codeword. NACK feedback information, regardless of whether there are actually 2 codeword schedules for the DL CC. For a DL CC whose transmission mode is MIMO but only one codeword transmission exists, the terminal device needs to generate a hypothesis for the second codeword. The ACK/NACK feedback state is such that the total number of ACK/NACK bits fed back by the terminal device is; In the LTE Rel-8 system, the terminal device pairs the generated packet/codeword location to generate NACK information. In the process of implementing the embodiments of the present invention, the applicant finds that the prior art has at least the following problems:
  • the terminal device when the terminal device is configured as a MIMO transmission mode on the PCC, but only one codeword scheduling exists in the DL PCC, the back-off is required to perform a 1-bit ACK for the PUCCH format la. NACK transmission.
  • the ACK feedback state corresponds to the modulation symbol "- ⁇
  • the NACK feedback state corresponds to the modulation symbol " ⁇ .
  • the terminal device receives only one codeword in the DL PCC
  • the corresponding ACK/NACK feedback information on the DL PCC generated by the terminal device is [ ⁇ , ⁇ ]
  • the corresponding transmission symbol is "j", as shown in Table 1 and Table 2, instead of "- ⁇ corresponding to PUCCH format la, therefore, it cannot be rolled back to PUCCH format la.
  • Embodiments of the present invention provide a method and a device for transmitting ACK/NACK feedback information, which are implemented in an LTE-A system, when DL CC reconfiguration or scheduling only in a DL PCC, implementing LTE Rd-8 PUCCH format la/lb The fallback of the transmission scheme.
  • an embodiment of the present invention provides a method for transmitting multi-bit ACK/NACK feedback information, including:
  • the terminal device When the terminal device receives only one codeword on the downlink primary component carrier configured in the multi-codeword transmission mode, the terminal device acquires 1-bit ACK/NACK feedback information of the received one codeword, and the The 1-bit ACK/NACK feedback information is repeated as 2 bits, which is the ACK/NACK feedback bit corresponding to the downlink primary component carrier; the terminal device acquires the corresponding corresponding downlink auxiliary component carrier. ACK/NACK feedback bit;
  • the terminal device sends the acquired ACK/NACK feedback bit corresponding to each configured downlink component carrier.
  • the embodiment of the present invention further provides a terminal device, including: an obtaining module, configured to acquire and receive when a terminal device receives only one codeword on a downlink primary component carrier configured in a multi-codeword transmission mode. 1 bit of ACK/NACK feedback information of one codeword, and repeating the 1-bit ACK/NACK feedback information to 2 bits, which is used as an ACK/NACK feedback bit corresponding to the downlink primary component carrier, and is also used to acquire each ACK/NACK feedback bits corresponding to the configured downlink secondary component carriers;
  • a sending module configured to send an ACK/NACK feedback bit corresponding to each configured downlink component carrier acquired by the acquiring module.
  • the embodiment of the invention has the following advantages:
  • the base station and the UE end pair transmission in the ACK/NACK feedback information feedback process may be avoided.
  • the solution understands the inconsistency of the detection result caused by the inconsistency, and thus implements the fallback of the LTE Rel-8 PUCCH format la/lb.
  • FIG. 1 is a schematic diagram of a single spectrum system in the prior art
  • FIG. 2 is a schematic diagram of a spectrum aggregation system in the prior art
  • FIG. 3 is a schematic flowchart of a method for transmitting ACK/NACK feedback information according to an embodiment of the present invention
  • FIG. 4 is a schematic flowchart of a method for transmitting ACK/NACK feedback information in application scenario 1 according to an embodiment of the present invention
  • FIG. 5 is a schematic flowchart of a method for transmitting ACK/NACK feedback information in application scenario 2 according to an embodiment of the present disclosure
  • 6A is a schematic flowchart of a method for transmitting ACK/NACK feedback information in application scenario 3 according to an embodiment of the present invention
  • 6B is a schematic flowchart of a method for transmitting ACK/NACK feedback information in application scenario 4 according to an embodiment of the present invention
  • FIG. 7 is a schematic flowchart of a method for transmitting ACK/NACK feedback information in application scenario 5 according to an embodiment of the present disclosure
  • FIG. 8 is a schematic flowchart of a method for transmitting ACK/NACK feedback information in application scenario 6 according to an embodiment of the present disclosure
  • FIG. 9 is a schematic flowchart of a method for transmitting ACK/NACK feedback information in application scenario 7 according to an embodiment of the present invention.
  • FIG. 10 is a schematic structural diagram of a terminal device according to an embodiment of the present invention. detailed description
  • PUCCH Format lb with channel selection has been determined as a scheme of ACK/NACK multiplexing (Multiplexing) transmission.
  • the LTE-A system can fall back to the single carrier ACK/NACK transmission mode in the LTE Rel-8 system, that is, the PUCCH format la/lb is equivalent. Perform ACK/NACK transmission.
  • a new ACK/NACK mapping table needs to be designed for the LTE-A system.
  • the table needs to satisfy the modulation symbol actually transmitted by PUCCH format lb with channel selection when the packet DTX state on the DL SCC is satisfied. And the used transport channel is consistent with PUCCH formatla/lb, thereby avoiding the inconsistency of detection results between the terminal device and the eNB.
  • ACK/NACK generation on DL PCC needs to be performed based on different DL PCC transmission modes to achieve backoff.
  • an embodiment of the present invention provides a PUCCH format lb.
  • the method with the channel selection scheme transmits ACK/NACK feedback information based on the ACK/NACK mapping table.
  • FIG. 3 is a schematic flowchart of a method for transmitting ACK/NACK feedback information according to an embodiment of the present invention, where the method specifically includes the following steps:
  • Step S301 The terminal device determines a bit number of the ACK/NACK feedback bit that needs to be fed back.
  • the processing of this step is mainly used to ensure the consistency of the number of bits of the ACK/NACK feedback information to be fed back by the terminal device side and the network side, and to avoid information ambiguity.
  • the terminal device determines the number of bits of the ACK/NACK feedback bits that need to be fed back according to the configured number of downlink component carriers and the transmission mode of each configured downlink carrier.
  • the terminal device determines the need according to the configured number of downlink component carriers, the number of downlink subframes that need to feed back ACK/NACK feedback bits corresponding to one uplink subframe, and the transmission mode of each configured downlink component carrier. The number of bits of the ACK/NACK feedback information that is fed back.
  • the terminal device determines the number of bits of the ACK/NACK feedback information that needs to be fed back after the transmission mode configuration or reconfiguration of the downlink component carrier and each configured downlink component carrier, and determines The value is unchanged after the terminal device receives the reconfiguration downlink carrier number or the signaling mode of the downlink carrier transmission mode, and then determines the number of bits of the ACK/NACK feedback information that needs to be fed back.
  • Step S302 When the terminal device receives only one codeword on the downlink primary component carrier configured in the multi-codeword transmission mode, the terminal device acquires 1-bit ACK/NACK feedback information of the received one codeword, and The bit ACK/NACK feedback information is repeated to 2 bits as the ACK/NACK feedback bit corresponding to the downlink primary component carrier.
  • the one codeword includes a codeword transmission dynamically scheduled and an indication
  • the PDCCH transmission of the downlink semi-persistent scheduling (SPS, Semi-Persistent Scheduling) is released, that is, when the terminal device receives only one PDCCH indicating the release of the downlink SPS resource on the downlink primary component carrier configured in the multi-codeword transmission mode.
  • the one codeword is equivalent to the PDCCH indicating the release of the downlink SPS resource, and the terminal device acquires the received ACK/NACK feedback information of the PDCCH indicating the release of the downlink SPS resource, and repeats the 1-bit ACK/NACK feedback information. It is 2 bits and is used as the ACK/NACK feedback bit corresponding to the downlink primary component carrier.
  • the terminal device uses the dynamic channel resource corresponding to one received codeword (including the PDCCH indicating the release of the downlink SPS resource) as the dynamic channel resource corresponding to the downlink primary component carrier in each channel resource used by the terminal device for channel selection. ; when superior, downlink primary component carrier is a multi-codeword transmission mode, as the ACK / NACK mapping table in a first channel resource ⁇ ⁇ ,. .
  • the dynamic channel resource is a channel resource on the uplink primary carrier determined by the terminal device according to the lowest sequence number of the control channel element CCE of the PDCCH, and the PDCCH is used by the scheduling terminal device to receive on the downlink primary carrier.
  • One codeword including a PDCCH indicating downlink SPS resource release
  • the PDCCH is transmitted on a downlink primary component carrier of the terminal device.
  • the PDCCH for scheduling one codeword transmission on the downlink primary component carrier may adopt DCI format 2/2A/2B/2C or DCI format 1A, and the specific mode type change does not affect the protection scope of the present invention.
  • the ACK/NACK feedback information after the copy processing can ensure the QPSK modulation symbols and channels corresponding to the ACK/NACK feedback state when the PUCCH format lb with channel selection is used.
  • the resource is aligned with the PUCCH format la, so that there is no information blur between the terminal device and the network side.
  • the terminal device When the terminal device receives two codewords simultaneously on the downlink primary component carrier configured in the multi-codeword transmission mode, the terminal device directly processes according to the existing technical solution because the information is not blurred.
  • the terminal device respectively obtains ACK/NACK feedback information corresponding to the two codewords that are scheduled. It should be noted that in this process, the generation of multi-codeword ACK/NACK feedback information does not use spatial bundling.
  • Step S303 The terminal device acquires ACK/NACK feedback bits corresponding to each configured downlink secondary component carrier.
  • the sum of the number of bits of the ACK/NACK feedback bit corresponding to each downlink secondary component carrier and the 2-bit ACK/NACK feedback bit corresponding to the downlink primary component carrier is equal to the ACK/NACK feedback bit that needs to be fed back determined in step S301.
  • the terminal device generates NACK or DTX feedback bits for each of the downlink secondary component carriers configured and not receiving the codeword.
  • a 2b-bit NACK or DTX is generated as feedback information for a downlink secondary component carrier whose transmission mode is a multi-codeword; and a 1-bit NACK or DTX feedback bit is generated for a downlink secondary member carrier whose transmission mode is a single codeword.
  • the terminal device when the terminal device receives only one codeword on the downlink secondary component carrier configured in the multi-codeword transmission mode, the terminal device acquires ACK/NACK feedback information corresponding to each configured downlink secondary component carrier.
  • the terminal device acquires 1-bit ACK/NACK feedback information of the received one codeword, and repeats the 1-bit ACK/NACK feedback information to 2 bits as the ACK/NACK feedback bit corresponding to the downlink secondary component carrier.
  • Step S304 The terminal device sends the acquired ACK/NACK feedback bit corresponding to each configured downlink component carrier.
  • the terminal device adopts a PUCCH format lb with channel selection scheme, and according to the obtained ACK/NACK feedback bit corresponding to each configured downlink component carrier, Determining a channel resource and a corresponding modulation symbol in the candidate channel resource; the terminal device transmitting the corresponding modulation symbol on the determined one channel resource.
  • the candidate channel resource includes at least one and a downlink primary component carrier.
  • the PDCCH is a PDCCH for scheduling one codeword received on the downlink primary component carrier or a PDCCH indicating downlink SPS resource release.
  • the dynamic channel resource corresponds to a lowest sequence number of a control channel element of the PDCCH, that is, according to a lowest sequence number of a control channel element of the PDCCH.
  • the terminal device uses the dynamic channel resource corresponding to the lowest sequence number of the control channel element of the PDCCH as the first dynamic channel corresponding to the downlink primary component carrier in the candidate channel resource used for channel selection.
  • the dynamic channel resource is used as the first channel resource among the candidate channel resources used for channel selection.
  • the dynamic channel resource corresponds to a lowest sequence number of a control channel element of the PDCCH.
  • the embodiment of the invention has the following advantages:
  • the ACK/NACK feedback information is transmitted based on the ACK/NACK mapping table by using the PUCCH format lb with channel selection scheme
  • the base station and the terminal pair transmission scheme are avoided during the ACK/NACK feedback information feedback process.
  • the inconsistency of the detection results caused by the inconsistency is understood, thereby achieving the fallback of the LTE Rel-8 PUCCH format la/lb.
  • ACK/NACK feedback information For a terminal device configured with multiple downlink carriers, when the terminal device uses the PUCCH Format lb with channel selection to feed back M-bit ACK/NACK information, 2 M 4, M is a positive integer, if the downlink primary carrier
  • M is a positive integer, if the downlink primary carrier
  • the transmission mode is multi-codeword transmission, and there is only one codeword scheduling transmission (including only one PDCCH transmission indicating the release of SPS resources), and the terminal device transmits
  • the process of ACK/NACK feedback information is as follows:
  • the terminal device acquires one codeword scheduled on a DL PCC configured as a multi-codeword transmission mode or 1-bit ACK/NACK feedback information corresponding to a PDCCH indicating SPS resource release, and provides 1-bit ACK/NACK feedback The information is repeated to 2 bits, and the repeated 1-bit ACK/NACK feedback information indicates that there is no ACK/NACK feedback information of the scheduled codeword.
  • the implicit (dynamic) channel resource corresponding to the codeword received on the DL PCC is used as the channel resource corresponding to the DL PCC among the M channel resources used for channel selection by the PUCCH Format lb with channel selection, where the DL PCC is used.
  • the implicit channel resource corresponding to the received codeword is an implicit channel resource on the UL PCC determined by the lowest CCE number of the PDCCH scheduling the codeword transmission on the DL PCC (if the DL PCC corresponds to 2 implicit channel resources)
  • the implicit channel resource determined according to the lowest CCE of the PDCCH is the first channel resource corresponding to the DL PCC, that is, n ⁇ co ⁇ ), and the PDCCH for scheduling the codeword transmission on the DL PCC may be DCI format 2/2A. Or DCI format 1A.
  • the generation of multi-codeword ACK/NACK feedback information does not use spatial bundling.
  • the terminal device obtains ACK/NACK feedback information (Rel-8 mode) of each codeword according to the actual reception situation.
  • the terminal device obtains the M-2 bit ACK/NACK feedback information corresponding to each configured DL SCC, where M is the number of ACK/NACK feedback bits determined by the terminal device according to the configuration, 2 ⁇ M ⁇ 4, setting N ( N > 2) For the number of DL CCs configured for the terminal device, the number of DL SCCs in the process is N-1.
  • the method for determining the number of ACK/NACK feedback bits by the terminal device is as follows: For the FDD system, determining the bit of the ACK/NACK feedback information that needs to be fed back according to the configured number of downlink component carriers and the transmission mode of each configured downlink carrier. Number
  • the ACK/NACK feedback that needs feedback is determined according to the configured number of downlink component carriers, the number of downlink subframes corresponding to one ACK/NACK feedback information corresponding to one uplink subframe, and the transmission mode of each configured downlink component carrier.
  • the number of bits of information is determined according to the configured number of downlink component carriers, the number of downlink subframes corresponding to one ACK/NACK feedback information corresponding to one uplink subframe, and the transmission mode of each configured downlink component carrier. The number of bits of information.
  • the process of generating ACK/NACK feedback information in this process includes the following two cases:
  • the terminal device when the terminal device does not receive the downlink data packet on the DL SCC, the terminal device sets the ACK/NACK feedback information of each codeword on the DL CC to a NACK or DTX state.
  • the same scheme as the ACK/NACK generation on the DL PCC may be adopted, that is, the actual reception is to be received.
  • the 1-bit ACK/NACK feedback information of one codeword is repeated as ACK/NACK feedback information of the codeword that is not scheduled.
  • the terminal device transmits the ACK/NACK feedback information of the M-bit to be fed back using the PUCCH format lb with channel selection transmission scheme.
  • the processing of the process specifically includes: the terminal device adopts a PUCCH format lb with channel selection transmission scheme, and selects an actual transmission channel resource and a transmission modulation symbol according to the M-bit ACK/NACK feedback information to be fed back according to the mapping table of the M-bit ACK/NACK transmission ( PUCCH format lb 4 QPSK constellation points), and send corresponding modulation symbols on the corresponding channel resources.
  • the terminal device adopts a PUCCH format lb with channel selection transmission scheme, and selects an actual transmission channel resource and a transmission modulation symbol according to the M-bit ACK/NACK feedback information to be fed back according to the mapping table of the M-bit ACK/NACK transmission ( PUCCH format lb 4 QPSK constellation points), and send corresponding modulation symbols on the corresponding channel resources.
  • the foregoing solution is applicable to the FDD system, and one carrier in the TDD system is in a specific application scenario, and the design of the ACK/NACK mapping table applied to the technical solution may be based on 2DL CC optimization.
  • the application process of the foregoing technical solution is described as follows in combination with a specific application scenario: Application scenario 1.
  • the DL CC reconfiguration process the UE reconfigures from 2 DL CCs to 1 DL CC.
  • the UE initially configures 2 DL CCs, and DL CC1 is DL PCC, using multiple codewords.
  • the DL CC2 is a DL SCC, and the single-codeword transmission mode is adopted.
  • the eNB only schedules the PDCCH on the DL PCC by carrying the DCI format 2 or the DCI format 2A or the DCI format 2B or the DCI format 2C, and only the codeword 1 is scheduled.
  • the process of transmitting ACK/NACK is as follows:
  • the terminal device side During the time period when the reconfiguration is not in effect, the UE still works based on the 2DLCC configuration, and uses the PUCCH format lb with channel selection scheme to transmit ACK/NACK, that is, the UE follows the 2 DL CC configurations and the transmission mode of each DL CC. Determining that a 3-bit ACK/NACK needs to be fed back; the UE obtains the ACK/NACK feedback information of the codeword 1 on the DL PCC as an ACK, and repeats the ACK/NACK feedback information of the codeword 1 as the feedback information of the codeword 0 that is not actually scheduled, that is, The feedback information corresponding to the codeword 0 is also ACK.
  • the ACK/NACK feedback information generated by the DL SCC is DTX, and the UE finally generates the 3-bit to-be-feedback ACK/NACK feedback information.
  • the UE determines an implicit channel resource on a UL PCC by scheduling the lowest CCE number of the PDCCH on the DL PCC of the codeword 1, as the ACK/NACK mapping table
  • the implicit channel resource corresponding to the DL PCC that is, the first channel resource as shown in Table 2.
  • the UE determines, according to the ACK/NACK mapping table shown in Table 2, that the channel resource to be fed back ACK/NACK feedback information is the first channel resource (ie, the first implicit channel resource corresponding to the DL PCC), Corresponding modulation symbol is "- ⁇ ; finally, the UE transmits the modulation symbol "-1" on the implicit channel resource on the UL PCC determined according to the minimum CCE number of the PDCCH of the scheduling codeword 1.
  • the base station only schedules one codeword 1 in the DL PCC. Therefore, the base station receives the ACK/NACK feedback information by using the PUCCH format la.
  • the channel resource of the PUCCH format la is the minimum CCE number of the PDCCH of the scheduling codeword 1.
  • the implicit channel resource on the UL PCC, and the modulation symbol corresponding to the ACK in the PUCCH format la is also "- ⁇ , that is, the actual transmission channel and the transmission modulation symbol of the UE and the base station are the same, there is no ambiguity problem; the base station detects the PUCCH format la Channel resource
  • the implicit channel resource on the UL PCC corresponding to the minimum CCE number of the PDCCH of the PDCCH may be obtained by the UE transmitting the modulation symbol "- ⁇ ", so that the feedback information ACK of the codeword 1 transmitted by the UE may be obtained.
  • Application scenario 2 DL CC During the reconfiguration process, the UE reconfigures from 2 DL CCs to 1 DL CC.
  • DL CC1 is DL PCC
  • multi-codeword transmission mode is adopted
  • DL CC2 is DL SCC
  • single codeword transmission mode is adopted.
  • the eNB schedules the codeword 0 only on the DL PCC by using the PDCCH of the DCI format 2 or the DCI format 2A or the DCI format 2B or the DCI format 2C or the DCI format 1A.
  • the process of transmitting the ACK/NACK is as follows:
  • Terminal device During the period when the reconfiguration is not in effect, the UE still works based on the 2DL CC configuration, and uses the PUCCH format lb with channel selection scheme to transmit ACK/NACK, that is, the UE follows 2 DL CC configurations and each DL CC transmission.
  • the mode determines that the 3-bit ACK/NACK needs to be fed back; the UE obtains the ACK/NACK feedback information of the codeword 0 on the DL PCC as ACK, and repeats the ACK/NACK feedback information of the codeword 0 as the feedback information of the codeword 1 that is not actually scheduled.
  • the feedback information corresponding to the codeword 1 is also ACK; if the UE does not detect the data packet on the DL SCC, the ACK/NACK feedback information generated by the DL SCC is DTX, and the UE finally generates the 3-bit to-be-feedback ACK/NACK feedback.
  • the information is [ACK, ACK, DTX]; the UE determines the implicit channel resource on one UL PCC by scheduling the lowest CCE number of the PDCCH on the DL PCC of codeword 0, and the implicit channel resource is used as an ACK/NACK mapping table.
  • the implicit channel resource corresponding to the DL PCC that is, the first channel resource as shown in Table 2.
  • the UE determines, according to the ACK/NACK mapping table, that the channel resource to be fed back ACK/NACK feedback information is the first channel resource (ie, the first implicit channel resource corresponding to the DL PCC), and the corresponding modulation symbol is - ⁇ ; Finally, the UE transmits the modulation symbol "- ⁇ on the implicit channel resource on the UL PCC determined according to the minimum CCE number of the PDCCH of the scheduling codeword 0;
  • the base station only schedules a codeword 0 in the DL PCC, so the base station uses the PUCCH format la to receive ACK/NACK feedback information; due to the PUCCH format la
  • the channel resource is the implicit channel resource on the UL PCC corresponding to the minimum CCE number of the PDCCH of the scheduling codeword 0, and the modulation symbol corresponding to the ACK in the PUCCH format la is also "- ⁇ , that is, the UE and the base station actually transmit.
  • the channel and the transmission modulation symbol are the same, and there is no ambiguity problem; the base station detects the channel resource of the PUCCH format la (ie, the implicit channel resource on the UL PCC corresponding to the minimum CCE number of the PDCCH scheduling the codeword 0), and can obtain the UE transmission modulation.
  • the symbol "- ⁇ " can obtain the feedback information ACK of the codeword 0 sent by the UE.
  • Application scenario 3 DL CC reconfiguration process, the UE is reconfigured from 2 DL CCs to 1 DL CC. As shown in FIG. 6A, the UE initially configures 2 DL CCs, and DL CC1 is DL PCC, and uses multiple codewords.
  • the DL CC2 is a DL SCC, and the multi-codeword transmission mode is adopted.
  • the eNB transmits only the codeword 0 on the DL PCC by using the PDCCH carrying the DCI format 2 or the DCI format 2A or the DCI format 2B or the DCI format 2C.
  • the flow of ACK/NACK is as follows:
  • Terminal device During the period when the reconfiguration is not in effect, the UE still works based on the 2DL CC configuration, and uses the PUCCH format lb with channel selection scheme to transmit ACK/NACK, that is, the UE follows 2 DL CC configurations and each DL CC transmission.
  • the mode determines that a 4-bit ACK/NACK is required to be fed back; the UE obtains the ACK/NACK feedback information of the codeword 0 on the DL PCC as an ACK, and repeats the ACK/NACK feedback information of the codeword 0 as the feedback information of the codeword 1 that is not actually scheduled.
  • the feedback information corresponding to the codeword 1 is also ACK; if the UE does not detect the data packet on the DL SCC, the ACK/NACK feedback information generated by the DL SCC is 2 DTX, and the UE finally generates the 4-bit to-be-feedback ACK/
  • the NACK feedback information is [ACK, ACK, DTX, DTX]; the UE determines the implicit channel resource on one UL PCC by scheduling the lowest CCE number of the PDCCH on the DL PCC of the codeword 0, and the implicit channel resource is used as the ACK/
  • the implicit channel resource corresponding to the DL PCC in the NACK mapping table that is, the first channel resource as shown in Table 3.
  • the UE determines, according to the ACK/NACK mapping table, that the channel resource to be fed back ACK/NACK feedback information is the first channel resource (ie, the first implicit channel resource corresponding to the DL PCC), and the corresponding modulation symbol is - ⁇ ; Finally, the UE is based on the scheduling codeword 0 The modulation symbol "-1" is transmitted on the implicit channel resource on the UL PCC determined by the minimum CCE number of the PDCCH;
  • Base station The base station only schedules a codeword 0 in the DL PCC, so the base station receives the ACK/NACK feedback information by using the PUCCH format la; the channel resource of the PUCCH format la is the minimum CCE number of the PDCCH scheduling the codeword 0.
  • the implicit channel resource on the UL PCC, and the modulation symbol corresponding to the ACK in the PUCCH format la is also "- ⁇ , that is, the actual transmission channel and the transmission modulation symbol of the UE and the base station are the same, there is no ambiguity problem; the base station detects the PUCCH format la
  • the channel resource ie, the implicit channel resource on the UL PCC corresponding to the minimum CCE number of the PDCCH of the scheduling codeword 0
  • Application scenario 4 DL CC reconfiguration process, the UE reconfigures from 2 DL CCs to 1 DL CC, as shown in FIG.
  • DL CC1 is DL PCC
  • DL CC2 is DL SCC.
  • the eNB schedules the codeword 0 only on the DL PCC by the PDCCH carrying the DCI format 1A, and the process of transmitting the ACK/NACK is as follows:
  • Terminal device During the period when the reconfiguration is not in effect, the UE still works based on the 2DL CC configuration, and uses the PUCCH format lb with channel selection scheme to transmit ACK/NACK, that is, the UE follows 2 DL CC configurations and each DL CC transmission.
  • the mode determines that the 4-bit ACK/NACK needs to be fed back; the ACK/NACK feedback information of the codeword 0 on the DL PCC is NACK, and the ACK/NACK feedback information of the codeword 0 is repeated as the feedback information of the codeword 1 that is not actually scheduled.
  • the feedback information corresponding to the codeword 1 is also NACK; if the UE does not detect the data packet on the DL SCC, the ACK/NACK feedback information generated by the DL SCC is 2 DTX, and the UE finally generates the 4-bit to-be-feedback ACK/
  • the NACK feedback information is [NACK, NACK, DTX, DTX]; the UE determines the implicit channel resource on one UL PCC by scheduling the lowest CCE number of the PDCCH on the DL PCC of the codeword 0, and the implicit channel resource is used as the ACK/
  • the implicit channel resource corresponding to the DL PCC in the NACK mapping table that is, the first channel resource as shown in Table 3. n ⁇ coj,.
  • the UE determines, according to the ACK/NACK mapping table, that the channel resource to be fed back ACK/NACK feedback information is the first channel resource (ie, the implicit channel resource corresponding to the DL PCC), and the corresponding modulation symbol is “ ⁇ ; last Transmitting, by the UE, a modulation symbol on the implicit channel resource on the UL PCC determined according to the minimum CCE number of the PDCCH of the scheduling codeword 0;
  • Base station The base station only schedules a codeword 0 in the DL PCC, so the base station receives the ACK/NACK feedback information by using the PUCCH format la; the channel resource of the PUCCH format la is the minimum CCE number of the PDCCH scheduling the codeword 0.
  • the implicit channel resource on the UL PCC, and the modulation symbol corresponding to the ACK in the PUCCH format la is also " ⁇ , that is, the actual transmission channel and the transmission modulation symbol of the UE and the base station are the same, there is no ambiguity problem; the base station detects the channel of the PUCCH format la
  • the resource ie, the implicit channel resource on the UL PCC corresponding to the minimum CCE number of the PDCCH of the scheduling codeword 0
  • the feedback information NACK of the codeword 0 sent by the UE can be obtained.
  • Application scenario 5 DL CC reconfiguration process, the UE reconfigures from 2 DL CCs to 1 DL CC, as shown in Figure 7, DL CC1 is DL PCC, adopts single codeword transmission mode, and DL CC2 is DL SCC. With the multi-codeword transmission mode, the eNB schedules the code on the DL SCC only through the PDCCH cross-carrier of the 7-bit DCI format 2 or DCI format 2A or DCI format 2B or DCI format 2C or DCI format 1A on the DL PCC. Word 0, the transmission scheme transmits ACK/NACK as follows:
  • the terminal device side During the time period when the reconfiguration is not in effect, the UE still works based on the 2DL CC configuration, and uses the PUCCH format lb with channel selection scheme to transmit the ACK/NACK, that is, the UE follows the 2 DL CC configurations and each DL CC.
  • the transmission mode determines that the 3-bit ACK/NACK needs to be fed back; the UE obtains the ACK/NACK feedback information of the codeword 0 on the DL SCC as an ACK, and repeats the ACK/NACK feedback information of the codeword 0 as the feedback information of the codeword 1 that is not actually scheduled.
  • the feedback information corresponding to the codeword 1 is also ACK; if the UE does not detect the data packet on the DL PCC, the ACK/NACK feedback information generated by the DL PCC is 1 DTX, and the 3 bits generated by the UE are to be reversed.
  • the ACK/NACK feedback information is [ACK, ACK, DTX]. (For 3-bit transmission, the ACK/NACK feedback information of the DL CC configured in the multi-codeword transmission mode is placed in front of the feedback information sequence, that is, the corresponding ACK/NACK mapping.
  • the resource is the implicit channel resource corresponding to the DL SCC in the ACK/NACK mapping table, that is, the first channel resource as shown in Table 3.
  • the UE determines, according to the ACK/NACK mapping table, that the channel resource to be fed back ACK/NACK feedback information is the first channel resource (ie, the implicit channel resource corresponding to the DL SCC), and the corresponding modulation symbol is “- ⁇ ; Finally, the UE transmits the modulation symbol "- ⁇ on the implicit channel resource on the UL PCC determined according to the minimum CCE number of the PDCCH of the codeword 0 on the scheduling SCC;
  • the base station side The base station only schedules one codeword 0 in the DL SCC, so the base station receives the ACK/NACK feedback information by using the PUCCH format la; the channel resource of the PUCCH format la is the minimum CCE number of the PDCCH for scheduling the codeword 0 on the SCC.
  • the implicit channel resource on the corresponding UL PCC, and the modulation symbol corresponding to the ACK in the PUCCH format la is also "- ⁇ , that is, the actual transmission channel and the transmission modulation symbol of the UE and the base station are the same, there is no ambiguity problem; the base station detects the PUCCH format
  • the channel resource of la (that is, the implicit channel resource on the UL PCC corresponding to the minimum CCE number of the PDCCH of the scheduling codeword 0) can be obtained by the UE transmitting the modulation symbol "- ⁇ , and the codeword on the DL SCC sent by the UE can be obtained. 0 feedback information ACK.
  • the UE is reconfigured from 2 DL CCs to 1 DL CC.
  • DL CC1 is a DL PCC
  • a multi-codeword transmission mode is adopted
  • DL CC2 is a DL SCC.
  • the eNB transmits only one PDCCH (SPS release PDCCH) indicating the release of the downlink SPS resources on the DL PCC, and the process of transmitting the ACK/NACK is as follows:
  • Terminal device side During the period when the reconfiguration is not in effect, the UE still works based on the 2DL CC configuration and uses the PUCCH format lb with channel selection scheme to transmit ACK/NACK, that is, the UE determines that the 3-bit ACK/NACK needs to be fed back according to the 2 DL CC configurations and the transmission mode of each DL CC; the UE obtains the ACK/NACK feedback information of the PDCCH indicating the downlink SPS resource release on the DL PCC as NACK, repeating the ACK/NACK feedback information to 2 bits, as the ACK/NACK feedback information of the DL PCC, that is, the PDCCH indicating the downlink SPS release is always processed as the codeword 0 in the multi-codeword transmission mode, actually The feedback information corresponding to the position of the uncoded codeword 1 is repeatedly obtained, that is, the feedback information corresponding to the position of the codeword 1 is also NACK; if the UE does not detect the data packet on the DL SCC
  • the implicit channel resource is the implicit channel resource corresponding to the DL PCC in the ACK/NACK mapping table, that is, the first channel resource as shown in Table 2. Then, the UE determines, according to the ACK/NACK mapping table, that the channel resource to be fed back ACK/NACK feedback information is the first channel resource (ie, the first implicit channel resource corresponding to the DL PCC), and the corresponding modulation symbol is Finally, the UE transmits the modulation symbol " ⁇ " on the implicit channel resource on the UL PCC determined according to the minimum CCE number of the PDCCH for which the downlink SPS resource is released.
  • the eNB sends only a PDCCH indicating the release of the downlink SPS resource in the DL PCC. Therefore, the base station uses the PUCCH format la to receive the ACK/NACK feedback information.
  • the channel resource of the PUCCH format la is the minimum PDCCH indicating the release of the downlink SPS resource.
  • the implicit channel resource on the UL PCC corresponding to the CCE number, and the modulation symbol corresponding to the NACK in the PUCCH format la is also " ⁇ , that is, the actual transmission channel and the transmission modulation symbol of the UE and the base station are the same, and there is no fuzzy problem;
  • the channel resource of the PUCCH format la ie, the implicit channel resource on the UL PCC corresponding to the minimum CCE number of the PDCCH indicating the release of the downlink SPS resource
  • the UE may send the modulation symbol "1", and the downlink SPS sent by the UE may be obtained.
  • the feedback information NACK of the PDCCH released by the resource is also " ⁇ , that is, the actual transmission channel and the transmission modulation symbol of the UE and the base station are the same, and there is no fuzzy problem;
  • the channel resource of the PUCCH format la ie, the implicit channel resource on the UL PCC corresponding to the minimum CCE number of the PDCCH indicating the release of the downlink SPS
  • the UE reconfigures from 2 DL CCs to 1 DL CC.
  • DL CC1 is DL PCC
  • multi-codeword transmission mode is adopted
  • DL CC2 is DL SCC.
  • the eNB transmits only one PDCCH indicating the release of the downlink SPS resources on the DL PCC, and the process of transmitting the ACK/NACK is as follows:
  • Terminal device During the period when the reconfiguration is not in effect, the UE still works based on the 2DL CC configuration, and uses the PUCCH format lb with channel selection scheme to transmit ACK/NACK, that is, the UE follows 2 DL CC configurations and each DL CC transmission.
  • the mode determines that the 4-bit ACK/NACK needs to be fed back; the UE obtains the ACK/NACK feedback information of the PDCCH indicating the downlink SPS resource release on the DL PCC as an ACK, and repeats the ACK/NACK feedback information as 2 bits, as the ACK/NACK of the DL PCC.
  • the feedback information that is, the PDCCH indicating the release of the downlink SPS is always processed as the codeword 0 in the multi-codeword transmission mode, and the feedback information corresponding to the position of the codeword 1 that is not actually scheduled is repeatedly obtained, that is, the location of the codeword 1
  • the corresponding feedback information is also ACK; if the UE does not detect the data packet on the DL SCC, the ACK/NACK feedback information generated by the DL SCC is DTX, and the 4-bit to-be-feedback ACK/NACK feedback information finally generated by the UE is [ACK] , ACK, DTX, DTX]; the UE determines an implicit channel resource on a UL PCC by using a minimum CCE number of the PDCCH received on the DL PCC indicating the release of the downlink SPS resource, the implicit The channel resource is the implicit channel resource corresponding to the DL PCC in the ACK/NACK mapping table, that is, the first channel resource as shown in Table 3.
  • the UE determines, according to the ACK/NACK mapping table, that the channel resource to be fed back ACK/NACK feedback information is the first channel resource (ie, the first implicit channel resource corresponding to the DL PCC), and the corresponding modulation symbol is The UE transmits a modulation symbol "-1" on the implicit channel resource on the UL PCC determined according to the minimum CCE number of the PDCCH indicating the downlink SPS resource release.
  • the eNB sends only a PDCCH indicating the release of the downlink SPS resource in the DL PCC. Therefore, the base station uses the PUCCH format la to receive the ACK/NACK feedback information.
  • the channel resource of the PUCCH format la is the minimum PDCCH indicating the release of the downlink SPS resource. Implicit channel resources on the UL PCC corresponding to the CCE number, and The modulation symbol corresponding to the ACK in the PUCCH format la is also "- ⁇ , that is, the actual transmission channel and the transmission modulation symbol of the UE and the base station are the same, and there is no ambiguity problem; the base station detects the channel resource of the PUCCH format la (ie, indicates the release of the downlink SPS resource).
  • the implicit channel resource on the UL PCC corresponding to the minimum CCE number of the PDCCH may be obtained by the UE transmitting the modulation symbol "-", so that the feedback information ACK of the PDCCH indicating the release of the downlink SPS resource sent by the UE may be obtained.
  • the embodiment of the invention has the following advantages:
  • the embodiment of the present invention when the ACK/NACK feedback information is transmitted based on the ACK/NACK mapping table by using the PUCCH format lb with channel selection scheme, the base station and the terminal device transmit the ACK/NACK feedback information during the feedback process.
  • the solution understands the inconsistency of the detection result caused by the inconsistency, and thus implements the fallback of the LTE Rel-8 PUCCH format la/lb.
  • the embodiment of the present invention further provides a terminal device, and a schematic structural diagram thereof is shown in FIG.
  • the obtaining module 71 is configured to: when the terminal device receives only one codeword on the downlink primary component carrier configured to transmit the multi-codeword transmission mode, obtain one-bit ACK/NACK feedback information of the received one codeword, and The ACK/NACK feedback bit corresponding to the downlink secondary component carrier is used to obtain the ACK/NACK feedback bit corresponding to each configured downlink secondary component carrier.
  • a codeword includes a codeword transmission of dynamic scheduling and a PDCCH transmission indicating a release of a Semi-Persistent Scheduling (SPS) resource, that is, when the terminal device is configured as a downlink primary member of a multi-codeword transmission mode.
  • SPS Semi-Persistent Scheduling
  • the one codeword is equivalent to the PDCCH indicating the release of the downlink SPS resource, and the terminal device acquires the received ACK of the PDCCH indicating the release of the downlink SPS resource.
  • NACK feedback information and repeats 1-bit ACK/NACK feedback information to 2 bits, which is used as the downlink primary component carrier. Should be ACK/NACK feedback bits;
  • the sending module 72 is configured to send the downlink of each configuration acquired by the obtaining module 71.
  • the terminal device further includes a determining module 73, configured to determine a number of bits of the ACK/NACK feedback bit that needs to be fed back, where the bits of the ACK/NACK feedback bit corresponding to each downlink secondary component carrier The sum of the number of the ACK/NACK feedback bits corresponding to the downlink primary component carrier is equal to the number of the ACK/NACK feedback bits that are determined by the determining module to be fed back, and specifically includes:
  • the ACK/NACK feedback that needs feedback is determined according to the configured number of downlink component carriers, the number of downlink subframes corresponding to one ACK/NACK feedback information corresponding to one uplink subframe, and the transmission mode of each configured downlink component carrier.
  • the number of bits in the bit is determined according to the configured number of downlink component carriers, the number of downlink subframes corresponding to one ACK/NACK feedback information corresponding to one uplink subframe, and the transmission mode of each configured downlink component carrier. The number of bits in the bit.
  • the obtaining module 71 is further configured to acquire a candidate channel resource, where the candidate channel resource includes at least one dynamic channel resource corresponding to a PDCCH that schedules a downlink primary component carrier.
  • the obtaining module 71 is further configured to determine, according to the lowest sequence number of the control channel element CCE of the PDCCH of the scheduled downlink primary component carrier, a dynamic channel resource.
  • the PDCCH for scheduling the downlink primary component carrier includes a PDCCH for dynamically scheduling data transmission and a PDCCH for releasing downlink SPS resources.
  • the terminal device further includes a selection module 74, configured to use the dynamic channel resource obtained by the obtaining module 71 according to the lowest sequence number of the control channel element CCE of the PDCCH of the scheduled downlink primary component carrier as the terminal device for channel selection.
  • the selection module 74 is further configured to: when the UE uses the PUCCH format lb with channel selection scheme to transmit ACK/NACK feedback information, the ACK/NACK feedback corresponding to each configured downlink component carrier acquired by the obtaining module 71.
  • the bit determines a corresponding one of the candidate channel resources acquired by the obtaining module 71.
  • the sending module 72 is specifically configured to send the modulation symbol on the corresponding channel resource selected by the selecting module 74.
  • the ACK/NACK feedback bit corresponding to each configured downlink secondary component carrier is obtained by the locating module, and further includes:
  • the obtaining module 71 generates a NACK or DTX feedback bit for each downlink auxiliary member carrier that is configured and does not receive the codeword; or
  • one-bit ACK/NACK feedback information of the received one codeword is obtained, and the 1-bit ACK/NACK feedback information is repeated. It is 2 bits, which is an ACK/NACK feedback bit of the downlink secondary component carrier.
  • the embodiment of the invention has the following advantages:
  • the base station and the terminal device transmit the ACK/NACK feedback information during the feedback process.
  • the solution understands the inconsistency of the detection result caused by the inconsistency, and thus implements the fallback of the LTE Rel-8 PUCCH format la/lb.
  • a form of software product is embodied, the computer software product being stored in a storage medium, including instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform the present invention.
  • a computer device which may be a personal computer, a server, or a network device, etc.
  • modules in the apparatus in the embodiment can be distributed in the apparatus of the embodiment according to the description of the embodiment, or the corresponding changes can be different.
  • the modules of the above embodiments may be combined into one module, or may be further split into multiple sub-modules.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)

Description

ACK/NACK反馈信息的传输方法和设备 本申请要求于 2010年 10月 18 日提交中国专利局， 申请号为 201010517313.6, 发明名称为 "ACK/NACK反馈信息的传输方法和 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
本发明涉及通信技术领域， 特别涉及一种 ACK/NACK反馈信息 的传输方法和设备。 背景技术
对于 LTE- A ( Long Term Evolution Advanced , 高级长期演进）， 为支持比 LTE ( Long Term Evolution, 长期演进 ) 系统更宽的系统带 宽， 比如 100MHz, —种可能是直接分配 100M带宽的频谱， 如图 1 所示； 一种可能是将分配给现有的系统一些频谱聚合起来， 凑成大带 宽供给长期演进多载波系统使用，此时系统中上下行载波可以不对称 配置， 即用户可能会占用 N > 1个载波进行下行传输， M > 1个载波 进行上行传输， 如图 2所示。
LTE-A系统目前确定最多可支持 5个载波进行聚合，一个 LTE-A 终端设备 ( User Equipment, 筒称 UE )需要在同一个上行子帧内反馈 对应多个下行载波及下行子帧的 ACK ( Acknowledgement , 确认） /NACK ( Negative Acknowledgement, 否定确认）反馈信息。 LTE-A 系统中， 已确定对于不超过 4 比特 ACK/NACK反馈信息可采用 PUCCH ( Physical Uplink Control Channel,物理上行控制信道 )Format lb with channel selection传输方案, 对于 FDD ( Frequency Division Duplex, 频分双工） 系统， 该方案应用的典型场景为 2个载波聚合场 景。
PUCCH Format lb with channel selection,通过终端设备在多个信 道资源进行选择传输来区分不同的 ACK/NACK反馈信息状态，其中， ACK/NAK映射表格就是用来实现待反馈的 ACK/NACK反馈信息与 实际信道传输信息（即 PUCCH format lb QPSK调制的 4个星座点 ) 及传输信道的映射。 对于 2、 3、 4比特 ACK/NACK反馈， 分别需要 2、 3、 4个上行控制信道资源。
LTE 系统中， 采用 PUCCH Format lb with channel selection传输 ACK/NACK时所使用的信道资源都为隐式信道资源。 所谓隐式信道 资源，就是一个上行载波上对应一个固定的下行载波的控制信息区域 预留的上行控制信道资源， 其中的控制信息区域的最小单位为 CCE ( Control Channel Element, 控制信道单元）， 终端设备通过在该下行 载波上发送的每个下行控制信令的最低 CCE编号， 都可计算获得一 个可用的上行控制信道资源，筒称该类资源为 "隐式信道资源"或 "动 态信道资源"。
在 LTE-A系统中， 每个 UL CC ( Uplink Component Carrier, 上 行成员载波） 上隐式信道资源的预留都只针对与之配对的 DL CC ( Downlink Component Carrier,下行成员载波)上的 PDCCH( Physical Downlink Control Channel,物理下行控制信道）进行预留， 而 PUCCH 只能在 UL PCC( Uplink Primary Component Carrier,上行主成员载波 ) 进行发送， 所以对于一个终端设备而言， 隐式信道资源只在 UL PCC 上存在，考虑到 UL PCC只针对 DL PCC( Downlink Primary Component Carrier, 下行主成员载波）进行资源预留， 只有在 DL PCC上的发送 的 PDCCH才存在隐式信道资源，因此， PUCCH format lb with channel selection所需的信道资源不一定都可以从隐式信道资源获得。
LTE-A系统中需要设计新的 ACK/NACK映射表格以满足以下要 求：
( 1 )尽可能使用在 UL PCC预留的隐式资源， 以减少上行控制 信道资源开销；
( 2 )可同时应用于跨载波调度和非跨载波调度场景以降低标准 复杂度； ( 3 )避免 LTE系统中 ACK/NACK映射表格中存在的多对一模 糊状态；
( 4 )可以解决 DL CC重配置过程中或只在 DL PCC存在数据包 调度时的模糊问题， 即当终端设备只在 DL PCC接收到数据包传输时 ( DL CC重配置时，较优的，基站只在 DL PCC发送一个子帧的下行 数据； 或 UE配置了多个 DL CC, 但基站只在 DL PCC上调度了一个 子帧的数据包）， 可回退为 LTE Rel-8中的 PUCCH format la/lb传输 方式， 即保证此种情况下采用 PUCCH format lb with channel selection 方案传输 ACK/NACK使用的 QPSK 星座点和信道资源， 与采用 PUCCH format la/lb传输主载波上的一个数据包对应的 ACK/NACK 使用的 QPSK调制符号 （或者称为星座点）和信道资源一致。
当 LTE-A Rel-10系统支持回退到 Rel-8 PUCCH format la/lb传输 时， 需要解决终端设备与 eNB ( evolved NodeB, 演进的 B节点， 即 基站）对终端设备实际采用的传输方案理解不一致问题，主要表现为： 情况 1: 当 DL CC重配置时， eNB和终端设备的生效时间不同， 会存在 eNB和终端设备对 DL CC的配置个数理解不一致问题。
例如， 终端设备配置 DL CC从 2个 CC降低到 1个 CC时， eNB 只在 DL PCC上调度一个码字， eNB期望在 UL PCC上采用 PUCCH format la ( FDD系统： 单码字传输或多码字传输但只存在一个码字调 度； 或 TDD系统： 单码字传输或多码字传输但只存在一个码字调度） 接收 1比特 ACK/NACK反馈信息， 或采用 PUCCH format lb ( FDD 系统： 多码字传输并且同时调度了 2个码字； 或 TDD系统： 多码字 传输并且同时调度了 2个码字 )接收 2比特 ACK/NACK反馈信息。
但是， 此配置在终端设备端未生效之前， 终端设备还会工作在 2DL CC配置下，仍旧会根据 2CC配置来生成 ACK/NACK反馈比特， 并在 UL PCC上采用 PUCCH format lb with channel selection方案传输 ACK/NACK反馈信息。 如果 UE经过信道选择后确定的 QPSK调制 符号和传输信道与 PUCCH format la/lb不一致， 则 eNB无法正确接 收 ACK/NACK信息。 反之， 当终端设备配置 DL CC从 1个 CC增加 到 2个 CC时， 同样存在上述理解不一致问题。
情况 2: 当 UE被配置了多个 DL CC, 但 eNB只在 DL PCC上存 在调度时， 会存在 eNB和终端设备对终端设备的实际传输方案理解 不一致问题。
例如， eNB只在 DL PCC调度了一个子帧的数据包传输， 因此期 望在 UL PCC上采用 PUCCH format la (调度单码字） /lb接收（调度 多码字） ACK/NACK反馈信息。
但是， 由于 UE配置工作在 2个 DL CC, 因此不论 UE实际在几 个 DL CC接收到数据包， UE都会根据 2CC配置来生成 ACK/NACK 反馈比特， 并在 UL PCC 上采用 PUCCH format lb with channel selection方案传输 ACK/NACK反馈信息。 如果 UE经过信道选择后 确定的 QPSK调制符号和传输信道与 PUCCH format la/lb不一致， 则 eNB无法正确接收 ACK/NACK信息。
为解决以上问题， 需保证 ACK/NACK映射表格设计满足对于只 在 DL PCC存在一个子帧的下行传输时的 ACK/NACK反馈状态所对 应的传输信道和调制符号应与 PUCCH format la/lb吻合。
如表 1所示的 FDD系统的 2比特 ACK/NACK映射表格中， 使用了 2 个信道资源进行信道选择， 无法支持对 PUCCH format lb的回退（即 选择的信道与 PUCCH format lb可能不一致， 例如选择信道 2时）， 带 有底色的 2个状态可以支持对 PUCCH format la的回退（即 QPSK符号 以及选择的信道与 PUCCH format la—致） 。
2比特 ACK/NACK反馈信息的映射表格
ACK/NACK反馈状态 信道 1 信道 2
( n 11P(1U)OCH,0 ) ' ( n 11P(1U)OCH,l ) '
DL PCC DL SCC RS Data RS Data
A A 1 -1
議 N/DTX 國 -1
Figure imgf000007_0001
如表 2所示的 FDD系统的 3比特 ACK/NACK映射表格中， 带 有底色的部分的 DL PCC为多码字模式时的映射方式， 此时， 带有底 色的 4个状态可支持对 PUCCH format lb的回退（即 QPSK符号以及 选择的信道与 PUCCH format lb一致），但不能支持对 PUCCH format la的回退（即 QPSK符号以及选择的信道与 PUCCH format la不一 致）； 粗体部分的 DL PCC为单码字模式时的映射方式， 此时， 粗体 的 2个状态可支持对 PUCCH format la的回退（即 QPSK符号以及选 择的信道与 PUCCH format la一致）。
3比特 ACK/NACK反馈信息的映射表格
Figure imgf000007_0002
如表 3所示的 FDD系统的 4比特 ACK/NACK映射表格中， DL PCC 为多码字模式时的映射方式， 此时， 粗体的 4个状态可支持对 PUCCH format lb的回退（即 QPSK符号以及选择的信道与 PUCCH format lb 一致）； 但不能支持对 PUCCH format la的回退（即 QPSK符号以及选 择的信道与 PUCCH format la不一致） 。
4比特 ACK/NACK反馈信息的映射表格
Figure imgf000008_0001
其中， 表 1、 表 2和表 3中的字符 A表示 ACK, 字符 N表示 NACK。 终端设备对一个下行载波的反馈信息状态包括 ACK (正确接收 的数据包）、 NACK (错误接收的数据包） 和 DTX ( Discontinuous Transmission, 不连续发送， 即表示丢失或未调度的数据包）。
目前 LTE-A FDD 系统中已经确定， 终端设备反馈 ACK/NACK 反馈信息比特基于配置的下行载波和每个下行载波的传输模式确定， 即终端设备在一个上行子帧需要反馈!; ς · Ν比特 ACK/NACK,其中， 为每个下行载波的码字数（单码李1传输时 C=l , 多码字传输时
C=2 ), 不同下行载波的传输模式（即码字数）可以不同， N 为终端 设备配置下行载波数。
对于 FDD系统， 当一个 DL CC为多码字传输模式， 即 MIMO ( Multiple-Input Multiple-Out-put, 多入多出）传输模式时， 终端设备 需要对每个码字单独生成 1比特 ACK/NACK反馈信息， 不论该 DL CC实际是否存在 2个码字调度。对于传输模式为 MIMO的但只存在 一个码字传输的 DL CC,终端设备需要对第二个码字生成一个假定的 ACK/NACK反馈状态， 以满足终端设备反馈的 ACK/NACK比特总 数为 ； 。 LTE Rel-8系统中， 终端设备对不存在调度的数据包 /码字 位置声生 NACK信息。 在实现本发明实施例的过程中，申请人发现现有技术至少存在以 下问题：
在 LTE- A Rel- 10系统中， 当终端设备在 PCC上配置为 MIMO传输 模式， 但实际在 DL PCC只存在一个码字调度时， 此时应支持回退为 PUCCH format la进行 1比特 ACK/NACK传输。 PUCCH format la中 ACK反馈状态对应调制符号 "-Γ , NACK反馈状态对应调制符号 "Γ。 如果按照 LTE Rd-8方式， 对不存在调度的码字位置产生 NACK信息， 则当终端设备只在 DL PCC收到一个码字时，终端设备生成的 DL PCC 上对应的 ACK/NACK反馈信息为 [Α,Ν]时， 对应的传输符号为 "j" , 如表 1和表 2所示， 而不是 PUCCH format la所对应的 "-Γ , 因此， 无法回退到 PUCCH format la。
目前， 在现有的技术中还没有相应的解决方案。 发明内容
本发明实施例提供一种 ACK/NACK反馈信息的传输方法和设 备， 解决 LTE-A系统中， 当 DL CC重配置或只在 DL PCC存在调度 时， 实现对 LTE Rd-8 PUCCH format la/lb传输方案的回退问题。
为达到上述目的， 本发明实施例一方面提供了一种多比特 ACK/NACK反馈信息的传输方法， 包括：
当终端设备在配置为多码字传输模式的下行主成员载波上只接 收到一个码字时， 终端设备获取所述接收到的一个码字的 1 比特的 ACK/NACK反馈信息， 并将所述 1比特 ACK/NACK反馈信息重复 为 2比特， 作为下行主成员载波所对应的 ACK/NACK反馈比特； 所述终端设备获取每个配置的下行辅成员载波所对应的 ACK/NACK反馈比特；
所述终端设备发送所获取的每个配置的下行成员载波所对应的 ACK/NACK反馈比特。 另一方面， 本发明实施例还提供了一种终端设备， 包括： 获取模块，用于当终端设备在配置为多码字传输模式的下行主成 员载波上只接收到一个码字时， 获取接收到的一个码字的 1 比特的 ACK/NACK反馈信息， 并将所述 1比特 ACK/NACK反馈信息重复 为 2比特， 作为下行主成员载波所对应的 ACK/NACK反馈比特， 还 用于获取每个配置的下行辅成员载波所对应的 ACK/NACK反馈比 特；
发送模块，用于发送所述获取模块所获取的每个配置的下行成员 载波所对应的 ACK/NACK反馈比特。
与现有技术相比， 本发明实施例具有以下优点：
通过应用本发明实施例的技术方案， 可以实现采用 PUCCH format lb with channel selection方案基于 ACK/NACK映射表格传输 ACK/NACK反馈信息时， 避免 ACK/NACK反馈信息反馈过程中的 基站和 UE端对传输方案理解不一致造成的检测结果的不一致问题， 从而， 实现对 LTE Rel-8 PUCCH format la/lb的回退。 附图说明
图 1为现有技术中单频谱系统示意图；
图 2为现有技术中频谱聚合系统示意图；
图 3为本发明实施例提出的一种 ACK/NACK反馈信息的传输方 法的流程示意图；
图 4为本发明实施例提出的应用场景一中的一种 ACK/NACK反 馈信息的传输方法的流程示意图；
图 5为本发明实施例提出的应用场景二中的一种 ACK/NACK反 馈信息的传输方法的流程示意图； 图 6A为本发明实施例提出的应用场景三中的一种 ACK/NACK 反馈信息的传输方法的流程示意图；
图 6B 为本发明实施例提出的应用场景四中的一种 ACK/NACK 反馈信息的传输方法的流程示意图；
图 7为本发明实施例提出的应用场景五中的一种 ACK/NACK反 馈信息的传输方法的流程示意图；
图 8为本发明实施例提出的应用场景六中的一种 ACK/NACK反 馈信息的传输方法的流程示意图；
图 9为本发明实施例提出的应用场景七中的一种 ACK/NACK反 馈信息的传输方法的流程示意图；
图 10为本发明实施例提出的一种终端设备的结构示意图。 具体实施方式
如背景技术所述， 在 LTE-A载波聚合（ CA, carrier aggregation ) 系统中， 目前已经确定了 PUCCH Format lb with channel selection作 为 ACK/NACK复用 （Multiplexing )传输的一种方案。
当终端设备只在下行主成员载波存在调度时， LTE-A系统可回退 ( fall back )为 LTE Rel-8系统中的单载波 ACK/NACK传输方式， 即 等效为采用 PUCCH format la/lb进行 ACK/NACK传输。
为了满足这种后向兼容需求， 需要对 LTE-A 系统设计新的 ACK/NACK 映射表格， 该表格需满足当 DL SCC上的数据包 DTX 状态时， PUCCH format lb with channel selection实际传输的调制符号 和使用的传输信道与 PUCCH formatla/lb相一致，从而避免终端设备 与 eNB之间检测结果的不一致问题。
考虑到 DL PCC可能存在单码字和多码字两种传输模式， DL PCC 上的 ACK/NACK生成需要基于不同的 DL PCC传输模式进行， 以实 现回退。
基于以上原因， 本发明实施例给出了一种采用 PUCCH format lb with channel selection 方案基于 ACK/NACK 映射表格传输 ACK/NACK反馈信息的方法。
如图 3所示， 为本发明实施例提出的一种 ACK/NACK反馈信息 的传输方法的流程示意图， 该方法具体包括以下步骤：
步骤 S301、终端设备确定需要反馈的 ACK/NACK反馈比特的比 特数。
本步骤的处理主要用于保证终端设备侧和网络侧对于待反馈的 ACK/NACK反馈信息的比特数的一致性， 避免信息模糊。
在本步骤中，具体的实现过程根据系统类型的差别存在以下两种 情况：
( 1 )对于 FDD系统， 终端设备根据配置的下行成员载波数量以 及每个配置的下行载波的传输模式确定需要反馈的 ACK/NACK反馈 比特的比特数。
( 2 )对于 TDD系统， 终端设备根据配置的下行成员载波数量、 一个上行子帧所对应的需要反馈 ACK/NACK反馈比特的下行子帧数 量， 以及每个配置的下行成员载波的传输模式确定需要反馈的 ACK/NACK反馈信息的比特数。
需要指出的是， 在实际应用中， 终端设备会在下行成员载波和每 个配置的下行成员载波的传输模式配置或重配置之后，进行需要反馈 的 ACK/NACK反馈信息的比特数的确定，确定后这个数值是不变的， 除非终端设备接收到重配置下行载波数或者下行载波的传输模式的 信令生效后， 才会重新确定需要反馈的 ACK/NACK反馈信息的比特 数。
步骤 S302、 当终端设备在配置为多码字传输模式的下行主成员 载波上只接收到一个码字时，终端设备获取接收到的一个码字的 1比 特的 ACK/NACK反馈信息， 并将 1比特 ACK/NACK反馈信息重复 为 2比特， 作为下行主成员载波所对应的 ACK/NACK反馈比特。
其中，上述一个码字包括动态调度的一个码字传输以及一个指示 下行半持续调度（ SPS, Semi-Persistent Scheduling )资源释放的 PDCCH 传输的情况，即当终端设备在配置为多码字传输模式的下行主成员载 波上只接收到一个指示下行 SPS资源释放的 PDCCH时，上述一个码 字等效于该指示下行 SPS资源释放的 PDCCH, 终端设备获取接收到 的指示下行 SPS资源释放的 PDCCH的 1比特的 ACK/NACK反馈信 息， 并将 1比特 ACK/NACK反馈信息重复为 2比特， 作为下行主成 员载波所对应的 ACK/NACK反馈比特。
其中，终端设备将接收到的一个码字（包括指示下行 SPS资源释 放的 PDCCH )所对应的动态信道资源作为终端设备进行信道选择所 使用的各信道资源中下行主成员载波所对应的动态信道资源； 较优 的， 当下行主成员载波为多码字传输模式时， 作为 ACK/NACK映射 表格中的第一个信道资源 ^Η,。。
在具体的应用场景中， 上述的动态信道资源为终端设备根据 PDCCH的控制信道元素 CCE的最低序号所确定的上行主载波上的一 个信道资源， PDCCH用于调度终端设备在下行主载波上接收到的一 个码字（包括指示下行 SPS资源释放的 PDCCH ), PDCCH在终端设 备的下行主成员载波上传输。
需要指出的是， 下行主成员载波上调度一个码字传输的 PDCCH 可采用 DCI format 2/2A/2B/2C或 DCI format 1A, 具体的方式类型变 化并不会影响本发明的保护范围。
通过上述方式， 结合前述的表 2和表 3, 可以看出， 经过复制处 理的 ACK/NACK反馈信息可以保证采用 PUCCH format lb with channel selection时的 ACK/NACK反馈状态所对应的 QPSK调制符号 和信道资源与 PUCCH format la—致，从而保证终端设备和网络侧之 间不会出现信息模糊。
而当终端设备在配置为多码字传输模式的下行主成员载波上同 时接收到两个码字时， 由于不会出现信息模糊的问题， 所以， 终端设 备直接按照现有的技术方案进行处理，终端设备分别获取被调度的两 个码字所对应的 ACK/NACK反馈信息。 需要指出的是， 在本过程中， 多码字 ACK/NACK反馈信息的生 成不采用 spatial bundling。
步骤 S303、 终端设备获取每个配置的下行辅成员载波所对应的 ACK/NACK反馈比特。
其中， 各下行辅成员载波所对应的 ACK/NACK反馈比特的比特 数与下行主成员载波所对应 2比特 ACK/NACK反馈比特之和等于步 骤 S301中所确定的需要反馈的 ACK/NACK反馈比特的比特数。
通过本步骤这样的处理，保证了终端设备和网络侧之间对于待反 馈的 ACK/NACK反馈比特的比特数的一致性。
在本步骤中，对于 ACK/NACK反馈比特，具体有两种生成方式： 方式一、 按照现有的处理
终端设备对每个配置的并且未收到码字的下行辅成员载波生成 NACK或 DTX反馈比特。
具体而言， 对传输模式为多码字的下行辅成员载波生成 2b比特 NACK或 DTX作为反馈信息； 对传输模式为单码字的下行辅成员载 波生成 1比特 NACK或 DTX反馈比特。
方式二、 复制 ACK/NACK反馈信息
与步骤 S302相类似， 当终端设备在配置为多码字传输模式的下 行辅成员载波上只接收到一个码字时，终端设备获取每个配置的下行 辅成员载波所对应的 ACK/NACK反馈信息， 终端设备获取接收到的 一个码字的 1比特的 ACK/NACK反馈信息，并将 1比特 ACK/NACK 反馈信息重复为 2比特，作为该下行辅成员载波所对应的 ACK/NACK 反馈比特。
需要指出的是， 在本过程中， 多码字 ACK/NACK反馈信息的生 成不采用 spatial bundling。
步骤 S304、 终端设备发送所获取的每个配置的下行成员载波所 对应的 ACK/NACK反馈比特。
终端设备采用 PUCCH format lb with channel selection方案， 根 据获取的每个配置的下行成员载波所对应的 ACK/NACK反馈比特在 候选信道资源中确定一个信道资源和对应的调制符号； 终端设备在确定的一个信道资源上发送相应的调制符号。
其中，所述候选信道资源至少包括一个与调度下行主成员载波的
PDCCH对应的动态信道资源， 其中所述 PDCCH为用于调度所述下 行主成员载波上接收到的一个码字的 PDCCH或指示下行 SPS资源释 放的 PDCCH。
较佳地， 所述动态信道资源与所述 PDCCH的控制信道元素的最 低序号对应，即根据所述 PDCCH的控制信道元素的最低序号来确定。
较佳地， 所述终端设备将与所述 PDCCH的控制信道元素的最低 序号对应的所述动态信道资源作为进行信道选择所使用的候选信道 资源中下行主成员载波所对应的第一个动态信道资源。即将该动态信 道资源作为进行信道选择所使用的候选信道资源中的第一个信道资 源。
在具体的应用场景中， 所述动态信道资源与所述 PDCCH的控制 信道元素的最低序号对应。
与现有技术相比， 本发明实施例具有以下优点：
通过应用本发明实施例的技术方案， 可以实现采用 PUCCH format lb with channel selection方案基于 ACK/NACK映射表格传输 ACK/NACK反馈信息时， 避免 ACK/NACK反馈信息反馈过程中由 于基站和终端对传输方案理解不一致造成的检测结果不一致问题，从 而， 实现对 LTE Rel-8 PUCCH format la/lb的回退。 下面， 结合具体的应用场景， 对本发明实施例所提出的技术方案 进行说明。
在 LTE-A 系统中， 对于配置了多个下行载波的终端设备， 当终 端设备采用 PUCCH Format lb with channel selection反馈 M比特 ACK/NACK信息时， 2 M 4, M为正整数， 如果下行主载波的传 输模式为多码字传输， 且实际只存在一个码字调度传输（包括仅存在 一个指示 SPS 资源释放的 PDCCH 传输） 时， 终端设备传输 ACK/NACK反馈信息的过程如下：
( 1 )首先， 终端设备获取配置为多码字传输模式的 DL PCC上 被调度的一个码字或指示 SPS 资源释放的 PDCCH对应的 1 比特 ACK/NACK反馈信息， 并将 1 比特 ACK/NACK反馈信息重复为 2 比特， 重复的 1 比特 ACK/NACK反馈信息表示没有被调度码字的 ACK/NACK反馈信息。
其中， DL PCC上接收到的码字所对应的隐式（动态）信道资源 作为 PUCCH Format lb with channel selection进行信道选择所使用的 M个信道资源中 DL PCC所对应的信道资源，其中 DL PCC上接收到 的码字所对应的隐式信道资源为 DL PCC 上调度该码字传输的 PDCCH的最低 CCE编号所确定的 UL PCC上的一个隐式信道资源 (如果 DL PCC对应 2个隐式信道资源，则根据该 PDCCH的最低 CCE 确定的隐式信道资源为 DL PCC 对应的第一个信道资源， 即为 n^co^ ) , DL PCC上调度该码字传输的 PDCCH可采用 DCI format 2/2A或 DCI format 1A。
在此过程中， 多码字 ACK/NACK反馈信息的生成不采用 spatial bundling。
不仅如此， 当 DL PCC上的两个码字同时被调度时， 终端设备根 据实际接收情况， 分别获得每个码字的 ACK/NACK反馈信息 ( Rel-8 方式）。
( 2 ) 终端设备获取配置的各 DL SCC 所对应的 M-2 比特 ACK/NACK 反馈信息， 其中 M 为终端设备根据配置确定的 ACK/NACK反馈比特数， 2 < M < 4, 设定 N ( N > 2 ) 为终端设备配 置的 DL CC个数， 则本处理过程中的 DL SCC的数量为 N-1个。
在此过程中， 多码字 ACK/NACK反馈信息的生成不采用 spatial bundling;
在此过程中，终端设备确定 ACK/NACK反馈比特数的方法如下： 对于 FDD系统， 根据配置的下行成员载波数量以及每个配置的 下行载波的传输模式确定需要反馈的 ACK/NACK反馈信息的比特 数；
对于 TDD系统， 根据配置的下行成员载波数量、 一个上行子帧 所对应的需要反馈 ACK/NACK反馈信息的下行子帧数量以及每个配 置的下行成员载波的传输模式确定需要反馈的 ACK/NACK反馈信息 的比特数。
不仅如此， 如前， 本过程中 ACK/NACK反馈信息的生成过程包 括以下两种情况：
A、 按照现有技术， 当终端设备在 DL SCC上没有接收到下行数 据包时，终端设备设置该 DL CC上每个码字的 ACK/NACK反馈信息 为 NACK或 DTX状态。
B、 按照与 DL PCC中相似的处理过程， 当 DL SCC为多码字传 输模式但终端设备只接收到一个码字时， 可采用与 DL PCC 上 ACK/NACK生成相同的方案， 即将实际接收到的 1个码字的 1比特 ACK/NACK 反馈信息进行重复， 作为没有被调度的码字的 ACK/NACK反馈信息。
( 3 )终端设备采用 PUCCH format lb with channel selection传输 方案发送 M比特待反馈的 ACK/NACK反馈信息。
本过程的处理具体包括， 终端设备采用 PUCCH format lb with channel selection传输方案， 根据 M比特 ACK/NACK传输的映射表 格，对待反馈的 M比特 ACK/NACK反馈信息选择实际传输信道资源 和传输调制符号 （ PUCCH format lb的 4个 QPSK星座点 ), 并在相 应的信道资源上发送相应的调制符号。
较优的， 上述方案适用于 FDD系统、 以及 TDD系统中一个载波 在具体的应用场景中， 应用于本技术方案的 ACK/NACK映射表 格的设计可以基于 2DL CC优化。 进一步的， 结合具体的应用场景， 对上述的技术方案的应用过程 描述如下： 应用场景一、 DL CC重配置过程， UE从 2个 DL CC重配置为 1 个 DL CC, 如图 4所示场景， UE初始配置了 2个 DL CC, DL CC1 为 DL PCC, 采用多码字传输模式， DL CC2为 DL SCC, 采用单码字 传输模式， eNB只在 DL PCC上通过承载 DCI format 2或者 DCI format 2A或者 DCI format 2B或者 DCI format 2C的 PDCCH调度， 并且仅 调度了码字 1 , 则传输 ACK/NACK的流程如下：
终端设备端： 重配置未生效的时间段内， UE仍基于 2DLCC配 置工作， 采用 PUCCH format lb with channel selection 方案传输 ACK/NACK, 即： UE按照 2个 DL CC配置以及每个 DL CC的传输 模式， 确定需要反馈 3比特 ACK/NACK; UE获得 DL PCC上码字 1 的 ACK/NACK反馈信息为 ACK, 重复码字 1的 ACK/NACK反馈信 息作为实际没有调度的码字 0的反馈信息，即码字 0对应的反馈信息 也为 ACK; UE在 DL SCC上没有检测到数据包， 则对 DL SCC生成 的 ACK/NACK反馈信息为 DTX, 则 UE最终生成的 3比特待反馈 ACK/NACK反馈信息为 [ACK,ACK,DTX]; UE通过调度码字 1的 DL PCC上的 PDCCH的最低 CCE编号， 确定一个 UL PCC上的隐式信 道资源， 该隐式信道资源作为 ACK/NACK映射表格中的 DL PCC所 对应的隐式信道资源，即如表 2所示的第一个信道资源 。；然后， UE根据表 2所示的 ACK/NACK映射表格， 确定待反馈 ACK/NACK 反馈信息传输的信道资源为第一个信道资源（即 DL PCC所对应的第 一个隐式信道资源）， 对应调制符号为 "-Γ ; 最后， UE在根据调度 码字 1的 PDCCH的最小 CCE编号所确定的 UL PCC上的隐式信道 资源上发送调制符号 "-1"；
基站端： 基站只在 DL PCC调度了一个码字 1 , 因此基站采用 PUCCH format la接收 ACK/NACK反馈信息；由于 PUCCH format la 的信道资源即为调度码字 1的 PDCCH的最小 CCE编号所对应的 UL PCC上的隐式信道资源， 且 PUCCH format la中 ACK所对应的调制 符号也为 "-Γ , 即 UE和基站实际传输信道和传输调制符号相同， 不 存在模糊问题； 基站检测 PUCCH format la的信道资源（即调度码字 1的 PDCCH的最小 CCE编号所对应的 UL PCC上的隐式信道资源）， 可得到 UE发送调制符号 "-Γ , 即可获得 UE发送的码字 1的反馈信 息 ACK。 应用场景二、 DL CC重配置过程， UE从 2个 DL CC重配置为 1 个 DL CC, 如图 5所示场景， DL CC1为 DL PCC, 采用多码字传输 模式， DL CC2为 DL SCC, 采用单码字传输模式， eNB只在 DL PCC 上通过 7 载 DCI format 2或 DCI format 2A或 DCI format 2B或 DCI format 2C 或 DCI format 1A 的 PDCCH 调度了码字 0, 则传输 ACK/NACK的流程如下：
终端设备端： 重配置未生效的时间段内， UE仍基于 2DL CC配 置工作， 采用 PUCCH format lb with channel selection 方案传输 ACK/NACK, 即： UE按照 2个 DL CC配置以及每个 DL CC的传输 模式， 确定需要反馈 3比特 ACK/NACK; UE获得 DL PCC上码字 0 的 ACK/NACK反馈信息为 ACK, 重复码字 0的 ACK/NACK反馈信 息作为实际没有调度的码字 1的反馈信息，即码字 1对应的反馈信息 也为 ACK; UE在 DL SCC上没有检测到数据包， 则对 DL SCC生成 的 ACK/NACK反馈信息为 DTX, 则 UE最终生成的 3比特待反馈 ACK/NACK反馈信息为 [ACK,ACK,DTX]; UE通过调度码字 0的 DL PCC上的 PDCCH的最低 CCE编号， 确定一个 UL PCC上的隐式信 道资源， 该隐式信道资源作为 ACK/NACK映射表格中的 DL PCC所 对应的隐式信道资源，即如表 2所示的第一个信道资源 。；然后， UE根据 ACK/NACK映射表格，确定待反馈 ACK/NACK反馈信息传 输的信道资源为第一个信道资源（即 DL PCC所对应的第一个隐式信 道资源），对应调制符号为" -Γ;最后，UE在根据调度码字 0的 PDCCH 的最小 CCE编号所确定的 UL PCC上的隐式信道资源上发送调制符 号 "-Γ ;
基站端： 基站只在 DL PCC调度了一个码字 0, 因此基站采用 PUCCH format la接收 ACK/NACK反馈信息；由于 PUCCH format la 的信道资源即为调度码字 0的 PDCCH的最小 CCE编号所对应的 UL PCC上的隐式信道资源， 且 PUCCH format la中 ACK所对应的调制 符号也为 "-Γ , 即 UE和基站实际传输信道和传输调制符号相同， 不 存在模糊问题； 基站检测 PUCCH format la的信道资源（即调度码字 0的 PDCCH的最小 CCE编号所对应的 UL PCC上的隐式信道资源 ), 可得到 UE发送调制符号 "-Γ , 即可获得 UE发送的码字 0的反馈信 息 ACK。 应用场景三、 DL CC重配置过程， UE从 2个 DL CC重配置为 1 个 DL CC, 如图 6A所示场景， UE初始配置了 2个 DL CC, DL CC1 为 DL PCC, 采用多码字传输模式， DL CC2为 DL SCC, 采用多码字 传输模式， eNB只在 DL PCC上通过承载 DCI format 2或 DCI format 2A或 DCI format 2B或 DCI format 2C的 PDCCH仅调度了码字 0,则 传输 ACK/NACK的流程如下：
终端设备端： 重配置未生效的时间段内， UE仍基于 2DL CC配 置工作， 采用 PUCCH format lb with channel selection 方案传输 ACK/NACK, 即： UE按照 2个 DL CC配置以及每个 DL CC的传输 模式， 确定需要反馈 4比特 ACK/NACK; UE获得 DL PCC上码字 0 的 ACK/NACK反馈信息为 ACK, 重复码字 0的 ACK/NACK反馈信 息作为实际没有调度的码字 1的反馈信息，即码字 1对应的反馈信息 也为 ACK; UE在 DL SCC上没有检测到数据包， 则对 DL SCC生成 的 ACK/NACK反馈信息为 2个 DTX, 则 UE最终生成的 4比特待反 馈 ACK/NACK反馈信息为 [ACK,ACK,DTX,DTX]; UE通过调度码字 0的 DL PCC上的 PDCCH的最低 CCE编号，确定一个 UL PCC上的 隐式信道资源，该隐式信道资源作为 ACK/NACK映射表格中 DL PCC 所对应的隐式信道资源， 即如表 3所示的第一个信道资源 ，。； 然 后， UE根据 ACK/NACK映射表格， 确定待反馈 ACK/NACK反馈信 息传输的信道资源为第一个信道资源（即 DL PCC所对应的第一个隐 式信道资源）， 对应调制符号为 "-Γ ; 最后， UE在根据调度码字 0 的 PDCCH的最小 CCE编号所确定的 UL PCC上的隐式信道资源上 发送调制符号 "-1"；
基站端： 基站只在 DL PCC调度了一个码字 0, 因此基站采用 PUCCH format la接收 ACK/NACK反馈信息；由于 PUCCH format la 的信道资源即为调度码字 0的 PDCCH的最小 CCE编号所对应的 UL PCC上的隐式信道资源， 且 PUCCH format la中 ACK所对应的调制 符号也为 "-Γ , 即 UE和基站实际传输信道和传输调制符号相同， 不 存在模糊问题； 基站检测 PUCCH format la的信道资源（即调度码字 0的 PDCCH的最小 CCE编号所对应的 UL PCC上的隐式信道资源 ), 可得到 UE发送调制符号 "-Γ , 即可获得 UE发送的码字 0的反馈信 息 ACK。 应用场景四、 DL CC重配置过程， UE从 2个 DL CC重配置为 1 个 DL CC, 如图 6B所示场景， DL CC1为 DL PCC, 采用多码字传输 模式， DL CC2为 DL SCC, 采用多码字传输模式， eNB只在 DL PCC 上通过承载 DCI format 1A 的 PDCCH 调度了码字 0 , 则传输 ACK/NACK的流程如下：
终端设备端： 重配置未生效的时间段内， UE仍基于 2DL CC配 置工作， 采用 PUCCH format lb with channel selection 方案传输 ACK/NACK, 即： UE按照 2个 DL CC配置以及每个 DL CC的传输 模式， 确定需要反馈 4比特 ACK/NACK; UE获得 DL PCC上码字 0 的 ACK/NACK反馈信息为 NACK, 重复码字 0的 ACK/NACK反馈 信息作为实际没有调度的码字 1的反馈信息，即码字 1对应的反馈信 息也为 NACK; UE在 DL SCC上没有检测到数据包， 则对 DL SCC 生成的 ACK/NACK反馈信息为 2个 DTX, 则 UE最终生成的 4比特 待反馈 ACK/NACK反馈信息为 [NACK,NACK,DTX,DTX]； UE通过 调度码字 0的 DL PCC上的 PDCCH的最低 CCE编号， 确定一个 UL PCC上的隐式信道资源， 该隐式信道资源作为 ACK/NACK映射表格 中 DL PCC所对应的隐式信道资源， 即如表 3所示的第一个信道资源 n^coj,。； 然后， UE 根据 ACK/NACK 映射表格， 确定待反馈 ACK/NACK反馈信息传输的信道资源为第一个信道资源（即 DL PCC 所对应的隐式信道资源）， 对应调制符号为 "Γ; 最后， UE在根据调 度码字 0的 PDCCH的最小 CCE编号所确定的 UL PCC上的隐式信 道资源上发送调制符号 "Γ;
基站端： 基站只在 DL PCC调度了一个码字 0, 因此基站采用 PUCCH format la接收 ACK/NACK反馈信息；由于 PUCCH format la 的信道资源即为调度码字 0的 PDCCH的最小 CCE编号所对应的 UL PCC上的隐式信道资源， 且 PUCCH format la中 ACK所对应的调制 符号也为 "Γ , 即 UE和基站实际传输信道和传输调制符号相同， 不 存在模糊问题； 基站检测 PUCCH format la的信道资源（即调度码字 0的 PDCCH的最小 CCE编号所对应的 UL PCC上的隐式信道资源 ), 可得到 UE发送调制符号 "1" , 即可获得 UE发送的码字 0的反馈信 息 NACK。 应用场景五、 DL CC重配置过程， UE从 2个 DL CC重配置为 1 个 DL CC, 如图 7所示场景， DL CC1为 DL PCC, 采用单码字传输 模式， DL CC2为 DL SCC,采用多码字传输模式， eNB只通过 DL PCC 上 7 载 DCI format 2或 DCI format 2A或 DCI format 2B或 DCI format 2C或 DCI format 1A的 PDCCH跨载波调度了 DL SCC上的码字 0, 则传输方案传输 ACK/NACK的流程如下：
终端设备端： 在重配置未生效的时间段内， UE仍基于 2DL CC 配置工作， 采用 PUCCH format lb with channel selection方案传输 ACK/NACK, 即： UE按照 2个 DL CC配置以及每个 DL CC的传输 模式， 确定需要反馈 3比特 ACK/NACK; UE获得 DL SCC上码字 0 的 ACK/NACK反馈信息为 ACK, 重复码字 0的 ACK/NACK反馈信 息作为实际没有调度的码字 1的反馈信息，即码字 1对应的反馈信息 也为 ACK; UE在 DL PCC上没有检测到数据包， 则对 DL PCC生成 的 ACK/NACK反馈信息为 1个 DTX, 则 UE最终生成的 3比特待反 馈 ACK/NACK反馈信息为 [ACK,ACK,DTX] (对于 3比特传输， 配置 为多码字传输模式的 DL CC的 ACK/NACK反馈信息放在反馈信息序 列的前面， 即对应 ACK/NACK映射表格中 ACK/NACK反馈状态的 前 2位）； UE通过调度 DL SCC上码字 0的在 DL PCC上传输的 PDCCH的最低 CCE编号， 确定一个 UL PCC上的隐式信道资源， 该 隐式信道资源作为 ACK/NACK映射表格中 DL SCC所对应的隐式信 道资源， 即如表 3 所示的第一个信道资源 ，。； 然后， UE根据 ACK/NACK映射表格， 确定待反馈 ACK/NACK反馈信息传输的信 道资源为第一个信道资源 （即 DL SCC所对应的隐式信道资源）， 对 应调制符号为 "-Γ; 最后， UE在根据调度 SCC上码字 0的 PDCCH 的最小 CCE编号所确定的 UL PCC上的隐式信道资源上发送调制符 号 "-Γ ;
基站端： 基站只在 DL SCC调度了一个码字 0, 因此基站采用 PUCCH format la接收 ACK/NACK反馈信息；由于 PUCCH format la 的信道资源即为调度 SCC上码字 0的 PDCCH的最小 CCE编号所对 应的 UL PCC上的隐式信道资源， 且 PUCCH format la中 ACK所对 应的调制符号也为 "-Γ , 即 UE和基站实际传输信道和传输调制符号 相同， 不存在模糊问题； 基站检测 PUCCH format la的信道资源（即 调度码字 0的 PDCCH的最小 CCE编号所对应的 UL PCC上的隐式 信道资源）， 可得到 UE发送调制符号 "-Γ , 即可获得 UE发送的 DL SCC上码字 0的反馈信息 ACK。 应用场景六、 DL CC重配置过程， UE从 2个 DL CC重配置为 1 个 DL CC, 如图 8所示场景， DL CC1为 DL PCC, 采用多码字传输 模式， DL CC2为 DL SCC, 采用单码字传输模式， eNB只在 DL PCC 上传输了一个指示下行 SPS 资源释放的 PDCCH ( SPS release PDCCH ), 则传输 ACK/NACK的流程如下：
终端设备端： 重配置未生效的时间段内， UE仍基于 2DL CC配 置工作， 采用 PUCCH format lb with channel selection 方案传输 ACK/NACK, 即： UE按照 2个 DL CC配置以及每个 DL CC的传输 模式， 确定需要反馈 3比特 ACK/NACK; UE获得 DL PCC上指示下 行 SPS资源释放的 PDCCH的 ACK/NACK反馈信息为 NACK, 重复 该 ACK/NACK反馈信息为 2比特， 作为 DL PCC的 ACK/NACK反 馈信息，即指示下行 SPS释放的 PDCCH总是被当作多码字传输模式 中的码字 0来进行处理，实际没有调度的码字 1位置对应的反馈信息 经重复得到， 即码字 1位置对应的反馈信息也为 NACK; UE在 DL SCC上没有检测到数据包， 则对 DL SCC生成的 ACK/NACK反馈信 息为 DTX, 则 UE最终生成的 3比特待反馈 ACK/NACK反馈信息为 [NACK,NACK,DTX]; UE通过 DL PCC上接收到的指示下行 SPS资 源释放的 PDCCH的最低 CCE编号， 确定一个 UL PCC上的隐式信 道资源， 该隐式信道资源作为 ACK/NACK映射表格中的 DL PCC所 对应的隐式信道资源，即如表 2所示的第一个信道资源 。；然后， UE根据 ACK/NACK映射表格，确定待反馈 ACK/NACK反馈信息传 输的信道资源为第一个信道资源（即 DL PCC所对应的第一个隐式信 道资源）， 对应调制符号为 "Γ ; 最后， UE在根据该指示下行 SPS 资源释放的 PDCCH的最小 CCE编号所确定的 UL PCC上的隐式信 道资源上发送调制符号 "Γ;
基站端：基站只在 DL PCC发送了一个指示下行 SPS资源释放的 PDCCH,因此基站采用 PUCCH format la接收 ACK/NACK反馈信息； 由于 PUCCH format la 的信道资源即为指示下行 SPS 资源释放的 PDCCH的最小 CCE编号所对应的 UL PCC上的隐式信道资源， 且 PUCCH format la中 NACK所对应的调制符号也为 "Γ , 即 UE和基 站实际传输信道和传输调制符号相同， 不存在模糊问题； 基站检测 PUCCH format la的信道资源 （即指示下行 SPS资源释放的 PDCCH 的最小 CCE编号对应的 UL PCC上的隐式信道资源 ), 可得到 UE发 送调制符号 "1" , 即可获得 UE发送的指示下行 SPS 资源释放的 PDCCH的反馈信息 NACK。 应用场景七、 DL CC重配置过程， UE从 2个 DL CC重配置为 1 个 DL CC, 如图 9所示场景， DL CC1为 DL PCC, 采用多码字传输 模式， DL CC2为 DL SCC, 采用多码字传输模式， eNB只在 DL PCC 上传输了一个指示下行 SPS资源释放的 PDCCH,则传输 ACK/NACK 的流程如下：
终端设备端： 重配置未生效的时间段内， UE仍基于 2DL CC配 置工作， 采用 PUCCH format lb with channel selection 方案传输 ACK/NACK, 即： UE按照 2个 DL CC配置以及每个 DL CC的传输 模式， 确定需要反馈 4比特 ACK/NACK; UE获得 DL PCC上指示下 行 SPS资源释放的 PDCCH的 ACK/NACK反馈信息为 ACK,重复该 ACK/NACK反馈信息为 2比特，作为 DL PCC的 ACK/NACK反馈信 息，即指示下行 SPS释放的 PDCCH总是被当作多码字传输模式中的 码字 0来进行处理，实际没有调度的码字 1位置对应的反馈信息经重 复得到， 即码字 1位置对应的反馈信息也为 ACK; UE在 DL SCC上 没有检测到数据包， 则对 DL SCC生成的 ACK/NACK反馈信息为 DTX, 则 UE 最终生成的 4 比特待反馈 ACK/NACK反馈信息为 [ACK, ACK,DTX,DTX]； UE通过 DL PCC上接收到的指示下行 SPS 资源释放的 PDCCH的最低 CCE编号， 确定一个 UL PCC上的隐式 信道资源， 该隐式信道资源作为 ACK/NACK映射表格中的 DL PCC 所对应的隐式信道资源， 即如表 3所示的第一个信道资源 ，。； 然 后， UE根据 ACK/NACK映射表格， 确定待反馈 ACK/NACK反馈信 息传输的信道资源为第一个信道资源（即 DL PCC所对应的第一个隐 式信道资源）， 对应调制符号为 "-Γ ; 最后， UE在根据该指示下行 SPS资源释放的 PDCCH的最小 CCE编号所确定的 UL PCC上的隐式 信道资源上发送调制符号 "-1"；
基站端：基站只在 DL PCC发送了一个指示下行 SPS资源释放的 PDCCH,因此基站采用 PUCCH format la接收 ACK/NACK反馈信息； 由于 PUCCH format la 的信道资源即为指示下行 SPS 资源释放的 PDCCH的最小 CCE编号所对应的 UL PCC上的隐式信道资源， 且 PUCCH format la中 ACK所对应的调制符号也为 "-Γ , 即 UE和基 站实际传输信道和传输调制符号相同， 不存在模糊问题； 基站检测 PUCCH format la的信道资源 （即指示下行 SPS资源释放的 PDCCH 的最小 CCE编号对应的 UL PCC上的隐式信道资源 ), 可得到 UE发 送调制符号 "- , 即可获得 UE发送的指示下行 SPS 资源释放的 PDCCH的反馈信息 ACK。
与现有技术相比， 本发明实施例具有以下优点：
通过应用本发明实施例的技术方案， 可以实现采用 PUCCH format lb with channel selection方案基于 ACK/NACK映射表格传输 ACK/NACK反馈信息时， 避免 ACK/NACK反馈信息反馈过程中由 于基站和终端设备对传输方案理解不一致造成的检测结果不一致问 题， 从而， 实现对 LTE Rel-8 PUCCH format la/lb的回退。 为了实现本发明实施例的技术方案，本发明实施例还提供了一种 终端设备， 其结构示意图如图 10所示， 具体包括：
获取模块 71 , 用于当终端设备在配置为多码字传输模式的下行 主成员载波上只接收到一个码字时，获取接收到的一个码字的 1比特 的 ACK/NACK反馈信息， 并将 1比特 ACK/NACK反馈信息重复为 2比特， 作为下行主成员载波所对应的 ACK/NACK反馈比特， 还用 于获取每个配置的下行辅成员载波所对应的 ACK/NACK反馈比特； 其中，上述一个码字包括动态调度的一个码字传输以及一个指示 下行半持续调度（ SPS, Semi-Persistent Scheduling )资源释放的 PDCCH 传输的情况，即当终端设备在配置为多码字传输模式的下行主成员载 波上只接收到一个指示下行 SPS资源释放的 PDCCH时，上述一个码 字等效于该指示下行 SPS资源释放的 PDCCH, 终端设备获取接收到 的指示下行 SPS资源释放的 PDCCH的 1比特的 ACK/NACK反馈信 息， 并将 1比特 ACK/NACK反馈信息重复为 2比特， 作为下行主成 员载波所对应的 ACK/NACK反馈比特；
发送模块 72, 用于发送获取模块 71所获取的每个配置的下行成 员载波所对应的 ACK/NACK反馈比特。
在具体的应用场景中， 本终端设备还包括确定模块 73 , 用于确 定需要反馈的 ACK/NACK反馈比特的比特数， 其中， 所述各下行辅 成员载波所对应的 ACK/NACK反馈比特的比特数与所述下行主成员 载波所对应的 2比特 ACK/NACK反馈比特之和等于所述确定模块所 确定的需要反馈的 ACK/NACK反馈比特的比特数， 具体包括：
对于 FDD系统， 根据配置的下行成员载波数量以及每个配置的 下行载波的传输模式确定需要反馈的 ACK/NACK反馈比特的比特 数；
对于 TDD系统， 根据配置的下行成员载波数量、 一个上行子帧 所对应的需要反馈 ACK/NACK反馈信息的下行子帧数量以及每个配 置的下行成员载波的传输模式确定需要反馈的 ACK/NACK反馈比特 的比特数。
进一步的， 获取模块 71 , 还用于获取候选信道资源， 所述候选 信道资源至少包括一个与调度下行主成员载波的 PDCCH对应的动态 信道资源。
获取模块 71 ,还用于根据所述调度下行主成员载波的 PDCCH的 控制信道元素 CCE的最低序号确定一个动态信道资源。 其中， 所述 调度下行主成员载波的 PDCCH包括动态调度数据传输的 PDCCH和 指示下行 SPS资源释放的 PDCCH。
另一方面， 本终端设备还包括选择模块 74, 用于将获取模块 71 根据所述调度下行主成员载波的 PDCCH的控制信道元素 CCE的最 低序号获取的一个动态信道资源作为终端设备进行信道选择所使用 的候选信道资源中下行主成员载波所对应的第一个动态信道资源。即 将该动态信道资源作为信道选择所使用的候选信道资源中的第一个 信道资源。 需要指出的是， 选择模块 74, 还用于当 UE采用 PUCCH format lb with channel selection方案传输 ACK/NACK反馈信息时，根 据获取模块 71获取的每个配置的下行成员载波所对应的 ACK/NACK 反馈比特在获取模块 71获取的候选信道资源中确定相对应的一个信 道资源和调制符号；
发送模块 72, 具体用于在选择模块 74所选择的相应的信道资源 上发送调制符号。
需要进一步指出的是， 获耳^莫块 71获取每个配置的下行辅成员 载波所对应的 ACK/NACK反馈比特， 进一步包括：
所述获取模块 71对每个配置的并且未收到码字的下行辅成员载 波生成 NACK或 DTX反馈比特； 或，
当在配置为多码字传输模式的下行辅成员载波上只接收到一个 码字时， 获取接收到的一个码字的 1比特的 ACK/NACK反馈信息， 并将 1比特 ACK/NACK反馈信息重复为 2比特， 作为下行辅成员载 波的 ACK/NACK反馈比特。
与现有技术相比， 本发明实施例具有以下优点：
通过应用本发明实施例的技术方案， 可以实现采用 PUCCH format lb with channel selection方案基于 ACK/NACK映射表格传输 ACK/NACK反馈信息时， 避免 ACK/NACK反馈信息反馈过程中由 于基站和终端设备对传输方案理解不一致造成的检测结果不一致问 题， 从而， 实现对 LTE Rel-8 PUCCH format la/lb的回退。 通过以上的实施方式的描述，本领域的技术人员可以清楚地了解 到本发明可借助软件加必需的通用硬件平台的方式来实现， 当然也可 以通过硬件，但很多情况下前者是更佳的实施方式。基于这样的理解， 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的方法。
本领域技术人员可以理解附图只是一个优选实施例的示意图，附 图中的模块或流程并不一定是实施本发明所必须的。
本领域技术人员可以理解实施例中的装置中的模块可以按照实 施例描述进行分布于实施例的装置中，也可以进行相应变化位于不同 于本实施例的一个或多个装置中。上述实施例的模块可以合并为一个 模块， 也可以进一步拆分成多个子模块。
上述本发明实施例序号仅仅为了描述， 不代表实施例的优劣。 以上公开的仅为本发明的几个具体实施例， 但是， 本发明并非局 限于此，任何本领域的技术人员能思之的变化都应落入本发明的保护 范围。

Claims

权利要求
1、 一种多比特 ACK/NACK反馈信息的传输方法， 其特征在于， 包括：
当终端设备在配置为多码字传输模式的下行主成员载波上只接 收到一个码字时， 终端设备获取所述接收到的一个码字的 1 比特的 ACK/NACK反馈信息， 并将所述 1比特 ACK/NACK反馈信息重复 为 2比特， 作为下行主成员载波所对应的 ACK/NACK反馈比特； 所述终端设备获取每个配置的下行辅成员载波所对应的 ACK/NACK反馈比特；
所述终端设备发送所获取的每个配置的下行成员载波所对应的 ACK/NACK反馈比特。
2、 如权利要求 1所述的方法， 其特征在于， 还包括：
所述终端设备确定需要反馈的 ACK/NACK反馈比特的比特数， 其中， 所述各下行辅成员载波所对应的 ACK/NACK反馈比特的比特 数与所述下行主成员载波对应的 2比特 ACK/NACK反馈比特之和等 于所述终端设备需要反馈的 ACK/NACK反馈比特的比特数。
3、 如权利要求 2所述的方法， 其特征在于， 所述终端设备确定 需要反馈的 ACK/NACK反馈比特的比特数的方法， 具体为：
对于 FDD系统， 所述终端设备根据配置的下行成员载波数量以 及每个配置的下行载波的传输模式确定需要反馈的 ACK/NACK反馈 比特的比特数；
对于 TDD系统， 所述终端设备根据配置的下行成员载波数量、 一个上行子帧所对应的需要反馈 ACK/NACK反馈比特的下行子帧数 量， 以及每个配置的下行成员载波的传输模式确定需要反馈的 ACK/NACK反馈信息的比特数。
4、 如权利要求 1所述的方法， 其特征在于， 所述终端设备获取 每个配置的下行辅成员载波所对应的 ACK/NACK反馈比特， 具体包 括： 所述终端设备对每个配置的并且未收到码字的下行辅成员载波 生成 NACK或 DTX反馈比特； 或，
当所述终端设备在配置为多码字传输模式的下行辅成员载波上 只接收到一个码字时，所述终端设备获取所述下行辅成员载波上接收 到的一个码字的 1 比特的 ACK/NACK反馈信息， 并将所述 1 比特 ACK/NACK反馈信息重复为 2 比特， 作为所述下行辅成员载波的 ACK/NACK反馈比特。
5、 如权利要求 1所述的方法， 其特征在于， 所述终端设备发送 所获取的每个配置的下行成员载波所对应的 ACK/NACK反馈比特， 具体为：
所述终端设备采用 PUCCH format lb with channel selection方案， 根据获得的各配置的下行成员载波所对应的 ACK/NACK反馈比特在 候选信道资源中确定一个信道资源和对应的调制符号；
所述终端设备在所述确定的一个信道资源上发送所述调制符号。
6、 如权利要求 5所述的方法， 其特征在于， 进一步包括： 所述候选信道资源至少包括一个与调度下行主成员载波的物理 下行控制信道 PDCCH对应的动态信道资源。
7、 如权利要求 6所述的方法， 其特征在于， 所述与调度下行主 成员载波的物理下行控制信道 PDCCH对应的动态信道资源， 进一步 包括：
所述动态信道资源与所述 PDCCH的控制信道元素的最低序号对 应。
8、 如权利要求 7所述的终端设备， 其特征在于， 所述终端设备 将与所述 PDCCH的控制信道元素的最低序号对应的所述动态信道资 源作为进行信道选择所使用的候选信道资源中下行主成员载波所对 应的第一个动态信道资源。
9、 一种终端设备， 其特征在于， 包括：
获取模块，用于当终端设备在配置为多码字传输模式的下行主成 员载波上只接收到一个码字时， 获取接收到的一个码字的 1 比特的 ACK/NACK反馈信息， 并将所述 1比特 ACK/NACK反馈信息重复 为 2比特， 作为下行主成员载波所对应的 ACK/NACK反馈比特， 还 用于获取每个配置的下行辅成员载波所对应的 ACK/NACK反馈比 特；
发送模块，用于发送所述获取模块所获取的每个配置的下行成员 载波所对应的 ACK/NACK反馈比特。
10、 如权利要求 9所述的终端设备， 其特征在于， 还包括确定模 块， 用于确定需要反馈的 ACK/NACK反馈比特的比特数， 其中， 所 述各下行辅成员载波所对应的 ACK/NACK反馈比特的比特数与所述 下行主成员载波对应的 2比特 ACK/NACK反馈比特之和等于所述确 定模块所确定的需要反馈的 ACK/NACK反馈比特的比特数， 具体包 括：
对于 FDD系统， 根据配置的下行成员载波数量以及每个配置的 下行载波的传输模式确定需要反馈的 ACK/NACK反馈比特的比特 数；
对于 TDD系统， 根据配置的下行成员载波数量、 一个上行子帧 所对应的需要反馈 ACK/NACK反馈比特的下行子帧数量， 以及每个 配置的下行成员载波的传输模式确定需要反馈的 ACK/NACK反馈比 特的比特数。
11、如权利要求 9所述的终端设备，其特征在于，所述获取模块， 还用于获取候选信道资源，所述候选信道资源至少包括一个与调度所 述下行主成员载波的物理下行控制信道 PDCCH对应的动态信道资 源。
12、 如权利要求 11所述的终端设备， 其特征在于， 所述获取模 块， 还用于根据所述调度下行主成员载波的 PDCCH的控制信道元素 CCE的最低序号确定一个动态信道资源。
13、 如权利要求 12所述的终端设备， 其特征在于， 还包括选择 模块， 用于将所述获取模块根据所述调度下行主成员载波的 PDCCH 的控制信道元素 CCE的最低序号获取的一个动态信道资源作为所述 终端设备进行信道选择所使用的候选信道资源中下行主成员载波所 对应的第一个动态信道资源。
14、 如权利要求 13所述的终端设备， 其特征在于， 所述选择模 块， 还用于采用 PUCCH format lb with channel selection方案， 根据 所述获取模块获取的每个配置的下行成员载波所对应的 ACK/NACK 反馈比特在所述获取模块获取的候选信道资源中确定相对应的一个 信道资源和调制符号；
所述发送模块，在所述选择模块所选择的相应的信道资源上发送 所述调制符号。
15、 如权利要求 9所述的终端设备， 其特征在于， 所述获取模块 获取每个配置的下行辅成员载波所对应的 ACK/NACK反馈比特， 进 一步包括：
所述获取模块对每个配置的并且未收到码字的下行辅成员载波 生成 NACK或 DTX反馈比特； 或，
当在配置为多码字传输模式的下行辅成员载波上只接收到一个 码字时，所述获取模块获取接收到的一个码字的 1比特的 ACK/NACK 反馈信息， 并将所述 1比特 ACK/NACK反馈信息重复为 2比特， 作 为所述下行辅成员载波的 ACK/NACK反馈比特。
PCT/CN2011/080427 2010-10-18 2011-09-30 Ack/nack反馈信息的传输方法和设备 WO2012051904A1 (zh)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP23170302.6A EP4228183A1 (en) 2010-10-18 2011-09-30 Method and apparatus for transmitting ack/nack feedback information
KR1020127031277A KR101447067B1 (ko) 2010-10-18 2011-09-30 Ａｃｋ/ｎａｃｋ 피드백 정보의 전송방법과 장치
JP2013519954A JP5523631B2 (ja) 2010-10-18 2011-09-30 Ａｃｋ／ｎａｃｋフィードバック情報の伝送方法と設備
US13/703,629 US8902784B2 (en) 2010-10-18 2011-09-30 Method and apparatus for transmitting ACK/NACK feedback information
EP11833810.2A EP2632070B1 (en) 2010-10-18 2011-09-30 Method and apparatus for transmitting ack/nack feedback information

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201010517313.6 2010-10-18
CN201010517313.6A CN102457363B (zh) 2010-10-18 2010-10-18 Ack/nack反馈信息的传输方法和设备

Publications (1)

Publication Number Publication Date
WO2012051904A1 true WO2012051904A1 (zh) 2012-04-26

Family

ID=45974682

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2011/080427 WO2012051904A1 (zh) 2010-10-18 2011-09-30 Ack/nack反馈信息的传输方法和设备

Country Status (6)

Country Link
US (1) US8902784B2 (zh)
EP (2) EP2632070B1 (zh)
JP (1) JP5523631B2 (zh)
KR (1) KR101447067B1 (zh)
CN (1) CN102457363B (zh)
WO (1) WO2012051904A1 (zh)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9100158B2 (en) * 2010-09-29 2015-08-04 Lg Electronics Inc. Method and apparatus for transmitting multiple reception confirmations in time division duplex system
KR101771550B1 (ko) * 2010-10-15 2017-08-29 주식회사 골드피크이노베이션즈 Ａｃｋ／ｎａｃｋ 신호 송수신 방법 및 장치
EP3024158A4 (en) * 2013-07-16 2017-06-14 Electronics and Telecommunications Research Institute Communication method in wireless communication system on basis of carrier aggregation
EP3198961B1 (en) * 2014-09-24 2019-06-26 Telefonaktiebolaget LM Ericsson (publ) Method and bs for scheduling ue and method and ue for transmitting harq
WO2016122242A2 (ko) * 2015-01-29 2016-08-04 엘지전자 주식회사 하향링크 제어 정보 수신 방법 및 사용자기기와, 하향링크 제어 정보 전송 방법 및 기지국
WO2016122386A2 (en) * 2015-01-30 2016-08-04 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for transmission of uplink control information
CN108886433A (zh) * 2016-01-19 2018-11-23 华为技术有限公司 一种针对上行信道的反馈方法及装置
WO2018000373A1 (zh) * 2016-06-30 2018-01-04 华为技术有限公司 一种数据传输方法、设备及系统
KR20180046741A (ko) * 2016-10-28 2018-05-09 삼성전자주식회사 통신 시스템에서 자원 할당 방법 및 장치
CN108933644A (zh) * 2017-05-25 2018-12-04 中兴通讯股份有限公司 一种提升两载波聚合下行调度harq反馈性能的方法及装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101686108A (zh) * 2008-09-22 2010-03-31 三星电子株式会社 利用多天线在多个信道上发送信息的方法
WO2010099653A1 (zh) * 2009-03-03 2010-09-10 深圳华为通信技术有限公司 信号编码方法及装置、联合反馈信号编码方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008112314A1 (en) * 2007-03-14 2008-09-18 Interdigital Technology Corporation Transmission of ack/nack and transmit power control feedback in evolved utra
KR101108718B1 (ko) * 2007-04-27 2012-02-29 엘지전자 주식회사 무선통신 시스템에서 브로드캐스트 정보 전송 방법
CN101588224B (zh) * 2009-05-19 2014-07-02 中兴通讯股份有限公司 一种发送正确/错误应答消息的方法及系统
CN101699781B (zh) * 2009-11-05 2015-09-16 中兴通讯股份有限公司 正确/错误应答消息和秩指示信令的编码方法及装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101686108A (zh) * 2008-09-22 2010-03-31 三星电子株式会社 利用多天线在多个信道上发送信息的方法
WO2010099653A1 (zh) * 2009-03-03 2010-09-10 深圳华为通信技术有限公司 信号编码方法及装置、联合反馈信号编码方法

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
CATT: "Design of Mapping Tables for PUCCH Format 1b with Channel Selection", 3GPP TSG RAN WG1 MEETING #62BIS, R1-105154, 11 October 2010 (2010-10-11) - 15 October 2010 (2010-10-15), XI'AN, CHINA, XP050450372, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsg_ran/WG1_RL1/TSGR1_62b/Docs/R1-105154.zip> [retrieved on 20111214] *
HUAWEI ET AL.: "ACK/NACK mapping tables for channel selection", 3GPP TSG RAN WG1 MEETING #62BIS R1-105245, 11 October 2010 (2010-10-11) - 15 October 2010 (2010-10-15), XP050450429, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsg_ran/WG1_RL1/TSGR1_62b/Docs/R1-105245.zip> [retrieved on 20111214] *
PANASONIC: "Mapping Tables for Format 1b with Channel Selection", 3GPP TSG RAN WG1 MEETING #62BIS R1-105476, 11 October 2010 (2010-10-11) - 15 October 2010 (2010-10-15), pages 1 - 7, XP050450596, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsg_ran/WG1_RL1/TSGR1_62b/Docs/R1-105476.zip> [retrieved on 20111214] *

Also Published As

Publication number Publication date
KR20130012961A (ko) 2013-02-05
JP2013533707A (ja) 2013-08-22
CN102457363A (zh) 2012-05-16
EP2632070A4 (en) 2018-06-27
EP2632070B1 (en) 2023-06-07
US8902784B2 (en) 2014-12-02
KR101447067B1 (ko) 2014-10-30
EP2632070A1 (en) 2013-08-28
US20130208633A1 (en) 2013-08-15
JP5523631B2 (ja) 2014-06-18
CN102457363B (zh) 2015-01-14
EP4228183A1 (en) 2023-08-16

Similar Documents

Publication Publication Date Title
US11038631B2 (en) Method and apparatus for determining number of HARQ processes in wireless communication system
US11160056B2 (en) Mobile communication system, base station device, mobile station device, communication method, and integrated circuit
JP5878652B2 (ja) 端末装置及び通信方法
JP6156664B2 (ja) 通信装置、通信方法及び集積回路
JP6238065B2 (ja) 端末装置、方法及び集積回路
JP6094914B2 (ja) 通信装置、通信方法及び集積回路
WO2012051904A1 (zh) Ack/nack反馈信息的传输方法和设备
US8976745B2 (en) Method for transmitting a control signal in a wireless communication system, and apparatus for same
TWI822665B (zh) 傳輸方法和裝置
WO2013021569A1 (ja) 端末装置、基地局装置及び送受信方法
WO2011120411A1 (zh) 上行控制信道资源的确定方法和设备
WO2012171413A1 (zh) Harq-ack的反馈处理方法及系统
WO2017028038A1 (zh) 一种上行控制信息的发送方法、接收方法及相关装置
WO2011124127A1 (zh) 调度信令发送及应答反馈的方法、系统和设备
WO2012034536A1 (zh) 一种应答信息的传输方法、基站及用户终端
CN102237982B (zh) 一种载波聚合系统下ack/nak的传输方法和设备
JP5871917B2 (ja) 端末装置及び応答信号送信方法

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 11833810

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 20127031277

Country of ref document: KR

Kind code of ref document: A

ENP Entry into the national phase

Ref document number: 2013519954

Country of ref document: JP

Kind code of ref document: A

WWE Wipo information: entry into national phase

Ref document number: 13703629

Country of ref document: US

NENP Non-entry into the national phase

Ref country code: DE

WWE Wipo information: entry into national phase

Ref document number: 2011833810

Country of ref document: EP