WO2013010472A1 - Procédé et dispositif de transmission d'informations de rétroaction - Google Patents

Procédé et dispositif de transmission d'informations de rétroaction Download PDF

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Publication number
WO2013010472A1
WO2013010472A1 PCT/CN2012/078707 CN2012078707W WO2013010472A1 WO 2013010472 A1 WO2013010472 A1 WO 2013010472A1 CN 2012078707 W CN2012078707 W CN 2012078707W WO 2013010472 A1 WO2013010472 A1 WO 2013010472A1
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Prior art keywords
dynamic scheduling
scheduling signaling
downlink dynamic
feedback
downlink
Prior art date
Application number
PCT/CN2012/078707
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English (en)
Chinese (zh)
Inventor
林亚男
沈祖康
高雪娟
Original Assignee
电信科学技术研究院
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Publication of WO2013010472A1 publication Critical patent/WO2013010472A1/fr

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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
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1854—Scheduling and prioritising arrangements
    • 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
    • H04L1/1832—Details of sliding window management
    • 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
    • H04L1/1864—ARQ related signaling

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for transmitting feedback information. Background technique
  • Version 10 (Rel-10) acknowledgment (ACK), acknowledgment (NACK), and non-acknowledgement (NACK) feedback information are combined to solve the problem of inaccurate feedback information caused by downlink dynamic scheduling signaling loss.
  • Each carrier is required to feed back 2 bits of combined feedback information.
  • CA carrier aggregation
  • Channel Physical Uplink Control Channel, PUCCH
  • LTE Long Term Evolution
  • LTE Advanced In the LTE-A system, the peak rate of the system is greatly improved compared to the LTE system, and it is required to achieve downlink 1 Gbps and uplink 500 Mbps. If only one carrier with a maximum bandwidth of 20MHz is used, the peak rate requirement cannot be reached.
  • the LTE-A system needs to expand the bandwidth that the terminal can use, thereby introducing the CA technology, that is, a plurality of consecutive or discontinuous carriers under the same base station (eNB) are aggregated together, and is also a user equipment (User Equipment, UE) service to provide the required rate.
  • These aggregated carriers are also called component carriers (cells).
  • Each cell can be a member carrier, and cells (member carriers) under different eNBs cannot be aggregated.
  • each carrier does not exceed 20 MHz at most.
  • the CA technology of the LTE-A system is shown in Figure 2.
  • the base station of the LTE-A system has four carriers that can be aggregated. The base station can perform data transmission with the UE on the four carriers at the same time to improve system throughput.
  • Time Division Duplex (TDD) ACK/NACK feedback information is as follows:
  • the UE may feed back ACK/NACK feedback information corresponding to multiple downlink subframes in one uplink subframe, that is, after the UE demodulates and decodes the data on the downlink subframe "-,
  • the uplink subframe will be fed back to the base station whether the number of downlink subframes needs to be retransmitted (ie, ACK/NACK feedback signal)
  • the value of the ke K , K - set is related to the system's uplink and downlink configuration and the specific subframe number, as shown in Table 1 below.
  • the one or more downlink subframes that use the same uplink subframe to send ACK/NACK feedback information are referred to as a “feedback window”.
  • a plurality of radio frames sequentially arranged i.e., if the wireless frame "in the last subframe of the radio frame" + 1 in a first subframe as a radio frame in a table an example is given of each uplink sub
  • the LTE system supports multiple ACK/NACK feedback schemes.
  • the feedback schemes can be mainly divided into two categories: combined feedback and multi-bit multiplexing feedback.
  • the implementation manner of the multi-bit multiplexing feedback includes: a channel selection scheme based on PUCCH format lb and a multiplexing transmission scheme based on PUCCH format 3.
  • the ACK/NACK feedback information can be sufficiently transmitted, so that the downlink transmission efficiency is high.
  • the uplink transmission performance is poor.
  • the UE combines the ACK/NACK feedback information corresponding to multiple downlink data packets, compresses the information to be fed back, and uses the PUCCH to transmit a small amount of information, so that the uplink transmission performance is relatively reliable. Therefore, UEs with poor conditions for uplink transmission channels need to use a combined feedback scheme.
  • the reason why the 2-bit information is to be fed back in each carrier is because the UE cannot judge whether the data packet sent by the base station is received, and the UE needs to feed back the number of correctly received subframes, so it is required Take up 2 bits of feedback.
  • the Downlink Assignment Index (DAI) information that has been used in the Rel-8 TDD system assists the UE in determining the downlink dynamic scheduling signaling loss, but the last downlink dynamic scheduling signal sent by the network side in the feedback window. In the case of whether or not it is lost, no judgment method is given.
  • the base station sends four downlink dynamic scheduling signalings in the feedback window, the UE correctly receives the first three downlink dynamic scheduling signalings, and the last downlink dynamic scheduling signaling is lost, the UE cannot determine that the downlink dynamic scheduling signaling is lost. , and the ACK information is fed back to the base station. After receiving the ACK information, the base station does not retransmit the data, and the fourth downlink dynamic scheduling signal is lost, which will affect the downlink data transmission performance.
  • the Rel-10 ACK/NACK feedback information combining scheme in the prior art solves the problem of inaccurate feedback information caused by downlink dynamic scheduling signaling loss, and requires each carrier to feed back 2-bit merge information.
  • the 10-bit information is also fed back after using the Rel-10 combining method, which will seriously affect the uplink PUCCH transmission performance, and the last downlink dynamic scheduling sent by the network side in the feedback window.
  • the prior art does not provide a determination scheme. Therefore, the prior art cannot effectively determine the loss of the downlink dynamic scheduling signaling. Summary of the invention
  • the embodiment of the invention provides a method and a device for transmitting feedback information, so that the UE can effectively determine the loss of the downlink dynamic scheduling signaling, and then feed back more accurate ACK/NACK feedback information, and can reduce each carrier.
  • the number of bits occupied by the ACK/NACK feedback information on the upper to ensure the demodulation performance of the uplink transmission.
  • the user equipment UE receives the downlink dynamic scheduling signaling, and includes specific indication information used to indicate whether the downlink dynamic scheduling signaling is the last downlink dynamic scheduling signaling corresponding to the same carrier in the feedback window where the downlink dynamic scheduling signaling is located.
  • the feedback window refers to one or more downlink subframes that use the same uplink subframe to send feedback information.
  • the UE determines, according to the downlink dynamic scheduling signaling received in the same feedback window, the feedback information corresponding to the feedback window on the carrier corresponding to the downlink dynamic scheduling signaling, and sends the feedback information.
  • the base station And transmitting, by the base station, the downlink dynamic scheduling signaling to the user equipment UE, where the base station is configured to indicate whether the downlink dynamic scheduling signaling is the last downlink dynamic scheduling signal corresponding to the same carrier in the feedback window where the downlink dynamic scheduling signaling is located.
  • the specific indication information of the command, the feedback window refers to one or more downlink subframes corresponding to the same uplink subframe used for transmitting the feedback information;
  • the base station receives feedback information corresponding to the feedback window sent by the UE.
  • the downlink dynamic scheduling signaling receiving unit is configured to receive the downlink dynamic scheduling signaling, where the method includes: indicating, by the downlink dynamic scheduling signaling, whether the downlink dynamic scheduling signaling is the last downlink dynamic scheduling signal corresponding to the same carrier in the feedback window where the downlink dynamic scheduling signaling is located
  • the specific indication information of the command, the feedback window refers to one or more downlink subframes that use the same uplink subframe to send feedback information;
  • the feedback information determining unit is configured to determine, according to the downlink dynamic scheduling signaling received in the same feedback window, feedback information corresponding to the feedback window on the carrier corresponding to the downlink dynamic scheduling signaling, and send the feedback information.
  • the downlink dynamic scheduling signaling sending unit is configured to send downlink dynamic scheduling signaling to the user equipment UE in the feedback window, where the method is configured to indicate whether the downlink dynamic scheduling signaling is in a feedback window of the downlink dynamic scheduling signaling Specific indication information of the last downlink dynamic scheduling signaling of the same carrier, where the feedback window refers to one or more downlink subframes corresponding to the same uplink subframe used for transmitting feedback information;
  • the feedback information receiving unit is configured to receive feedback information corresponding to the feedback window sent by the UE.
  • the user equipment UE receives the downlink dynamic scheduling signaling, which is used to indicate whether the downlink dynamic scheduling signaling is the last downlink dynamic scheduling signaling corresponding to the same carrier in the feedback window where the downlink dynamic scheduling signaling is located.
  • the feedback window refers to one or more downlink subframes that use the same uplink subframe to send feedback information; the UE determines the downlink dynamic scheduling signal according to the downlink dynamic scheduling signaling received in the same feedback window.
  • the feedback information corresponding to the feedback window is sent on the corresponding carrier, and the feedback information is sent, so that the UE can effectively determine the loss of the downlink dynamic scheduling signaling according to the specific indication information, and feedback a more accurate ACK/NACK.
  • the feedback information is sent to the network side, and the number of bits occupied by the ACK/NACK feedback information on each carrier can be reduced to ensure the demodulation performance of the uplink transmission.
  • FIG. 1 is a schematic diagram of carrier distribution of an LTE cell in the prior art
  • FIG. 2 is a schematic diagram of a CA of LTE-A in the prior art
  • FIG. 3 is a schematic flowchart of a method for sending feedback information according to an embodiment of the present disclosure
  • FIG. 4 is a schematic flowchart diagram of a method for acquiring feedback information according to an embodiment of the present disclosure
  • FIG. 5 is a schematic diagram of the last downlink dynamic scheduling signaling loss in the feedback window according to the embodiment of the present invention
  • FIG. 6 is a schematic diagram of the intermediate downlink dynamic scheduling signaling loss in the feedback window according to the embodiment of the present invention
  • FIG. 8 is a schematic structural diagram of an apparatus for acquiring feedback information according to an embodiment of the present invention. detailed description
  • the embodiment of the invention provides a method and a device for transmitting feedback information, so that the UE can effectively determine the loss of the downlink dynamic scheduling signaling, and then feed back more accurate ACK/NACK feedback information, and can reduce each carrier.
  • the number of bits occupied by the ACK/NACK feedback information on the upper to ensure the demodulation performance of the uplink transmission.
  • a method for sending feedback information includes the following steps:
  • the UE receives the downlink dynamic scheduling signaling, where the UE includes the specific indication information that is used to indicate whether the downlink dynamic scheduling signaling is the last downlink dynamic scheduling signaling corresponding to the same carrier in the feedback window where the downlink dynamic scheduling signaling is located.
  • the feedback window refers to one or more downlink subframes that use the same uplink subframe to send feedback information.
  • the feedback window in the embodiment of the present invention refers to one or more downlink subframes that use the same uplink subframe to send feedback information.
  • the downlink dynamic scheduling signaling in the embodiment of the present invention may be, for example, signaling for scheduling Dynamic Downlink Shared Channel (PDSCH) transmission, or scheduling for semi-static (SPS) resource release. Signaling and so on.
  • PDSCH Dynamic Downlink Shared Channel
  • SPS semi-static
  • the carrier corresponding to the downlink dynamic scheduling signaling in the embodiment of the present invention may be a carrier that transmits the downlink dynamic scheduling signaling, or may be another carrier.
  • the carrier corresponding to the downlink dynamic scheduling signaling is the carrier indicated by the carrier indication field (CIF) in the downlink dynamic scheduling signaling; and for the case of non-cross-carrier scheduling, the downlink dynamics
  • the carrier corresponding to the scheduling signaling is a carrier that transmits the downlink dynamic scheduling signaling.
  • the downlink dynamic scheduling signaling includes The specific indication information is used to indicate whether the downlink dynamic scheduling signaling is the last downlink dynamic scheduling signaling in the downlink dynamic scheduling signaling corresponding to the second carrier in the feedback window where the downlink dynamic scheduling signaling is located.
  • the specific indication information included in the downlink dynamic scheduling signaling is used to indicate whether the downlink dynamic scheduling signaling is the The last downlink dynamic scheduling signaling in the downlink dynamic scheduling signaling corresponding to the first carrier in the feedback window where the downlink dynamic scheduling signaling is located.
  • the UE receives the downlink dynamic scheduling signaling (DL grant), and according to the specific indication information in the DL grant, it can be determined whether the current scheduling is the last downlink dynamic scheduling of the same carrier in the feedback window where the downlink dynamic scheduling signaling is located. .
  • DL grant downlink dynamic scheduling signaling
  • the UE determines, according to the downlink dynamic scheduling signaling received in the same feedback window, feedback information corresponding to the feedback window on the carrier corresponding to the downlink dynamic scheduling signaling, and sends the feedback information.
  • the feedback information is generated based on carrier combining, and the feedback information is 1-bit feedback information.
  • the UE determines downlink dynamic scheduling according to downlink dynamic scheduling signaling received in the same feedback window.
  • the feedback information corresponding to the feedback window on the carrier corresponding to the signaling includes:
  • the UE determines, according to the downlink dynamic scheduling signaling received in the same feedback window, whether there is downlink dynamic scheduling signaling loss in the feedback window on the carrier corresponding to the downlink dynamic scheduling signaling, and if yes, determining the feedback window on the carrier.
  • the corresponding feedback information is non-acknowledgment (NACK) feedback information or discontinuous transmission (DTX) information; otherwise,
  • Determining whether there is a transmission block (TB) decoding failure in the feedback window on the carrier and if yes, determining that the feedback information corresponding to the feedback window on the carrier is NACK feedback information; otherwise, determining the corresponding feedback window on the carrier
  • the feedback information is ACK feedback information.
  • the ACK/NACK information corresponding to all the TBs in the carrier is combined, or the ACK/NACK information corresponding to different TBs in the same subframe is first spatially combined. That is, as long as one TB in the same subframe cannot be correctly decoded, the feedback information corresponding to the subframe is NACK information, and then the ACK/NACK information of each spatially merged subframe is subjected to the foregoing combining processing.
  • the feedback information is generated based on the combination of codewords, and the feedback information is N-bit feedback information, where N is a positive integer, and the value of N is a pre-configured codeword. Equal in number;
  • the UE determines, according to the downlink dynamic scheduling signaling received in the same feedback window, the feedback information corresponding to the feedback window on the carrier corresponding to the downlink dynamic scheduling signaling, including:
  • the UE determines, according to the downlink dynamic scheduling signaling received in the same feedback window, whether there is downlink dynamic scheduling signaling loss in the feedback window on the carrier corresponding to the downlink dynamic scheduling signaling, and if yes, determining the feedback window on the carrier.
  • the corresponding N-bit feedback information is NACK feedback information or DTX information; otherwise,
  • nth bit feedback information corresponding to the feedback window on the carrier is NACK feedback information; otherwise, determining the carrier
  • the nth bit feedback information corresponding to the feedback window is ACK feedback information, where n is a positive integer, and " ⁇ .
  • the UE when the UE receives the downlink dynamic scheduling signaling released by the SPS resource in the feedback window, if all the TBIs in the feedback window (that is, the transmission block numbered 1 of the codeword) are decoded correctly, the downlink is performed.
  • the first bit feedback information of the feedback information corresponding to the feedback window on the carrier corresponding to the dynamic scheduling signaling is ACK feedback information.
  • the UE determines, according to the downlink dynamic scheduling signaling received in the same feedback window, whether there is downlink dynamic scheduling signaling loss in the feedback window on the carrier corresponding to the downlink dynamic scheduling signaling, including:
  • DAI downlink allocation indication
  • the UE may determine, according to the DAI information in the DL grant, that the current scheduling is the first downlink dynamic scheduling in the feedback window on the carrier corresponding to the DL grant.
  • the UE determines, according to the specific indication information in the last downlink dynamic scheduling signaling received in the feedback window, whether there is downlink dynamic scheduling signaling in the feedback window on the carrier corresponding to the downlink dynamic scheduling signaling. Lost, including:
  • the downlink dynamic scheduling signaling is not the same carrier that is sent by the network side in the feedback window where the downlink dynamic scheduling signaling is located.
  • the downlink dynamic scheduling signaling loss in the feedback window on the carrier corresponding to the downlink dynamic scheduling signaling is determined.
  • the UE determines, according to the DAI information in the last downlink dynamic scheduling signaling received in the feedback window, whether there is downlink dynamics in the feedback window of the carrier corresponding to the last downlink dynamic scheduling signaling.
  • Scheduling signaling loss including:
  • the total number of downlink dynamic scheduling signalings that are received by the same downlink carrier dynamic scheduling signaling in the feedback window is smaller than the network side indicated by the DAI information in the last downlink dynamic scheduling signaling.
  • the downlink dynamic scheduling in the feedback window on the carrier corresponding to the last downlink dynamic scheduling signaling is determined. Signaling is lost.
  • a method for obtaining feedback information includes the following steps:
  • the base station sends the downlink dynamic scheduling signaling to the user equipment UE in the feedback window, where the base station is configured to indicate whether the downlink dynamic scheduling signaling is the last downlink dynamic corresponding to the same carrier in the feedback window where the downlink dynamic scheduling signaling is located.
  • the specific indication information of the scheduling signaling, where the feedback window refers to one or more downlink subframes corresponding to the same uplink subframe used for transmitting the feedback information.
  • the base station receives the feedback information corresponding to the feedback window sent by the UE.
  • the feedback information is: ACK feedback information, or NACK feedback information, or DTX information.
  • the feedback information corresponding to the feedback window sent by the UE is 1-bit feedback information
  • the feedback information is ACK feedback information, NACK feedback information, or DTX information.
  • the indication bit occupied by the feedback information indicates that the ACK feedback information is 1 and the NACK feedback information is indicated by 0, and the DTX information is indicated by null.
  • the feedback information corresponding to the feedback window sent by the UE is N-bit feedback information, where N is a positive integer, and the value of N is equal to the number of pre-configured codewords
  • the feedback information includes the same
  • the feedback information corresponding to the transmission block of the codeword number, and the feedback information may be ACK feedback information, NACK feedback information or DTX information.
  • the feedback information corresponding to the transport block with the codeword number n is the nth bit feedback information in the feedback information corresponding to the feedback window. Therefore, the feedback information corresponding to the feedback window is ACK feedback information, NACK feedback information, or DTX information.
  • the technical solution provided by the foregoing embodiments of the present invention may be applicable to a carrier aggregation system, and may also be applicable to other non-carrier aggregation systems.
  • each carrier is configured.
  • the ACK/NACK information in the same feedback window is combined, and the specific combining process may be based on a carrier or a codeword. If the carrier is based, the feedback information corresponding to the same feedback window corresponding to each carrier is 1 bit of feedback information. If the codeword is based, the feedback information corresponding to the same feedback window corresponding to each carrier is N-bit feedback information, where N is a positive integer, and the value of N is equal to the number of pre-configured codewords.
  • a specific judgment scheme for downlink dynamic scheduling signaling loss for example:
  • the UE may It is determined that there is downlink dynamic scheduling signaling loss.
  • the downlink dynamic scheduling signaling in which the specific indication information is located is not the last downlink dynamic scheduling signaling in the downlink dynamic scheduling signaling corresponding to the same carrier in the feedback window where the downlink dynamic scheduling signaling is located; If the specific indication information is 1, the downlink dynamic scheduling signaling where the specific indication information is located is the last downlink dynamic scheduling signaling corresponding to the same carrier in the feedback window where the downlink dynamic scheduling signaling is located. As shown in FIG. 5, the UE receives the specific indication information in the last downlink dynamic scheduling signaling in the second subframe (downlink subframe 2) in the feedback window, and the UE determines that there is at least one downlink dynamic scheduling signal. Let it be lost.
  • the UE may determine that there is downlink dynamic scheduling signaling. Lost.
  • the UE receives data in a third subframe (downlink subframe 3) in the feedback window, where DAI information in the downlink dynamic scheduling signaling indicates that the downlink dynamic scheduling signaling is in the feedback window.
  • the third downlink dynamic scheduling signaling but the UE only receives the data packets in the first subframe and the third subframe, and determines that the downlink dynamic scheduling signaling is lost.
  • the specific indication information and the DAI information in the embodiment of the present invention are independently configured on each carrier.
  • a device for transmitting feedback information includes: a downlink dynamic scheduling signaling receiving unit 11 configured to receive downlink dynamic scheduling signaling, where Whether the dynamic scheduling signaling is the specific indication information of the last downlink dynamic scheduling signaling corresponding to the same carrier in the feedback window of the downlink dynamic scheduling signaling, where the feedback window refers to sending the feedback information by using the same uplink subframe.
  • a downlink dynamic scheduling signaling receiving unit 11 configured to receive downlink dynamic scheduling signaling, where Whether the dynamic scheduling signaling is the specific indication information of the last downlink dynamic scheduling signaling corresponding to the same carrier in the feedback window of the downlink dynamic scheduling signaling, where the feedback window refers to sending the feedback information by using the same uplink subframe.
  • the feedback window refers to sending the feedback information by using the same uplink subframe.
  • the feedback information determining unit 12 is configured to determine, according to the downlink dynamic scheduling signaling received in the same feedback window, feedback information corresponding to the feedback window on the carrier corresponding to the downlink dynamic scheduling signaling, and send the feedback information.
  • the feedback information is 1-bit feedback information
  • the feedback information determining unit 12 is configured to determine, according to the downlink dynamic scheduling signaling received in the same feedback window, whether there is downlink dynamic scheduling signaling loss in the feedback window on the carrier corresponding to the downlink dynamic scheduling signaling, if And determining, that the feedback information corresponding to the feedback window on the carrier is NACK feedback information or DTX information; otherwise,
  • the feedback information determining unit determines whether there is a transmission block TB decoding failure in the feedback window on the carrier, and if yes, determining that the feedback information corresponding to the feedback window on the carrier is NACK feedback information; otherwise, determining the carrier
  • the feedback information corresponding to the feedback window is ACK feedback information.
  • the feedback information is N-bit feedback information, where N is a positive integer, and the value of N is equal to the number of pre-configured codewords;
  • the feedback information determining unit 12 is configured to determine, according to the downlink dynamic scheduling signaling received in the same feedback window, whether there is downlink dynamic scheduling signaling loss in the feedback window on the carrier corresponding to the downlink dynamic scheduling signaling, if And determining that the N-bit feedback information corresponding to the feedback window on the carrier is NACK feedback information or DTX information; otherwise,
  • the feedback information determining unit 12 determines whether the transmission block TB with the codeword number n in the feedback window fails to be decoded, and if yes, determines that the nth bit feedback information corresponding to the feedback window on the carrier is NACK feedback information. Otherwise, it is determined that the nth bit feedback information corresponding to the feedback window on the carrier is ACK feedback information, where n is a positive integer, and " ⁇ .
  • the feedback information determining unit 12 is configured to determine, according to the specific indication information in the last downlink dynamic scheduling signaling received in the feedback window, the feedback on the carrier corresponding to the downlink dynamic scheduling signaling. Whether there is downlink dynamic scheduling signaling loss in the window; or, according to the DAI information in the last downlink dynamic scheduling signaling received in the feedback window, determining the feedback window on the carrier corresponding to the downlink dynamic scheduling signaling Whether there is downlink dynamic scheduling signaling loss.
  • the downlink dynamic scheduling signaling receiving unit 11 receives the specific indication information in the last downlink dynamic scheduling signaling in the feedback window, indicating that the downlink dynamic scheduling signaling is not the network side in the downlink.
  • the feedback information determining unit 12 determines the feedback on the carrier corresponding to the downlink dynamic scheduling signaling, when the last downlink dynamic scheduling signaling in the downlink dynamic scheduling signaling of the same carrier is sent in the feedback window of the dynamic scheduling signaling. There is downlink dynamic scheduling signaling loss in the window.
  • the total number of downlink dynamic scheduling signaling that is received by the downlink dynamic scheduling signaling receiving unit 11 in the feedback window and corresponding to the last downlink dynamic scheduling signaling is smaller than the last downlink.
  • the feedback information determining unit 12 is configured when the total number of downlink dynamic scheduling signalings of the same carrier corresponding to the last downlink dynamic scheduling signaling sent by the DAI information in the dynamic scheduling signaling is actually in the feedback window. Determining that there is downlink dynamic scheduling signaling loss in the feedback window on the carrier corresponding to the last downlink dynamic scheduling signaling.
  • a device for acquiring feedback information includes: a downlink dynamic scheduling signaling sending unit 21, configured to send downlink dynamic scheduling signaling to a user equipment UE in a feedback window. And the specific indication information used to indicate whether the downlink dynamic scheduling signaling is the last downlink dynamic scheduling signaling corresponding to the same carrier in the feedback window where the downlink dynamic scheduling signaling is located, where the feedback window refers to the same One or more downlink subframes of an uplink subframe used for transmitting feedback information;
  • the feedback information receiving unit 22 is configured to receive feedback information corresponding to the feedback window sent by the UE.
  • the feedback information is: ACK feedback information, or NACK feedback information, or DTX information.
  • the UE receives the downlink dynamic scheduling signaling, where the method includes: indicating whether the downlink dynamic scheduling signaling is the last downlink dynamic scheduling corresponding to the same carrier in the feedback window where the downlink dynamic scheduling signaling is located.
  • the specific indication information of the signaling, the feedback window refers to one or more downlink subframes that use the same uplink subframe to send feedback information; the UE determines the downlink according to the downlink dynamic scheduling signaling received in the same feedback window.
  • the ACK/NACK feedback information is sent to the network side, which effectively avoids the problem that the feedback information is inaccurate due to the loss of the last downlink dynamic scheduling signaling.
  • the number of bits occupied by the ACK/NACK feedback information on each carrier can be reduced to ensure the demodulation performance of the uplink transmission.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the present invention is in the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) in which computer usable program code is embodied.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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Abstract

La présente invention concerne un procédé et un dispositif de transmission d'informations de rétroaction, utilisés pour permettre à un équipement utilisateur (UE) de juger efficacement le scénario de perte d'une signalisation d'ordonnancement dynamique de liaison descendante et, grâce à cela, de réinjecter des informations de rétroaction d'accusé de réception (ACK)/non-accusé de réception (NACK) plus précises, et capables de réduire le nombre de bits occupés par les informations de rétroaction ACK/NACK sur chaque support afin d'optimiser les performances de démodulation de la transmission de liaison montante. Le procédé consistant à : recevoir, par l'UE, une signalisation d'ordonnancement dynamique de liaison descendante, incluant des informations d'indication spécifiques utilisées pour indiquer si oui ou non la signalisation d'ordonnancement dynamique de liaison descendante est la dernière signalisation d'ordonnancement dynamique de liaison descendante correspondant à un support identique à l'intérieur de la fenêtre de rétroaction où se trouve la signalisation d'ordonnancement dynamique de liaison descendante, la fenêtre de rétroaction renvoyant à une ou plusieurs sous-trames de liaison descendante utilisant une sous-trame de liaison montante identique pour transmettre des informations de rétroaction ; et déterminer, par l'équipement utilisateur, les informations de rétroaction correspondant à la fenêtre de rétroaction sur le support correspondant à la signalisation d'ordonnancement dynamique de liaison descendante en fonction de la signalisation d'ordonnancement dynamique de liaison descendante reçue dans une fenêtre de rétroaction identique, et transmettre les informations de rétroaction.
PCT/CN2012/078707 2011-07-19 2012-07-16 Procédé et dispositif de transmission d'informations de rétroaction WO2013010472A1 (fr)

Applications Claiming Priority (2)

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