WO2012129952A1 - Procédé et système destinés à l'envoi d'un message d'accusé de réception dans un système à duplexage par répartition dans le temps - Google Patents

Procédé et système destinés à l'envoi d'un message d'accusé de réception dans un système à duplexage par répartition dans le temps Download PDF

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Publication number
WO2012129952A1
WO2012129952A1 PCT/CN2011/084975 CN2011084975W WO2012129952A1 WO 2012129952 A1 WO2012129952 A1 WO 2012129952A1 CN 2011084975 W CN2011084975 W CN 2011084975W WO 2012129952 A1 WO2012129952 A1 WO 2012129952A1
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WIPO (PCT)
Prior art keywords
ack
pucch format
harq
resource
pdcch
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PCT/CN2011/084975
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English (en)
Chinese (zh)
Inventor
梁春丽
戴博
喻斌
邬华明
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中兴通讯股份有限公司
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Publication of WO2012129952A1 publication Critical patent/WO2012129952A1/fr

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Classifications

    • 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
    • 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

Definitions

  • the present invention relates to the field of communications, and in particular, to a method and system for transmitting a response message in a time division duplex system.
  • the codeword sent by the originator can not only detect errors but also have certain error correction capability.
  • the receiver decoder After receiving the codeword, the receiver decoder first checks the error condition. If the error correction capability of the codeword is within, the error correction is automatically performed. If there are many errors, the error correction capability of the codeword is exceeded, but the error can be detected. Then, the receiving end sends a decision signal to the originating end through the feedback channel, and requests the originating end to resend the information.
  • a HARQ Acknowledgement (HARQ-ACK, HARQ Acknowledgement) is used to indicate a reception condition of a transmitted data at a terminal, where a HARQ-ACK response message is used. It includes three states: ACK, Acknowledgement, Negative Acknowledgement, and Discontinuous Transmission (DTX), where DTX indicates that the terminal does not receive control for demodulating downlink data. The channel, and thus the demodulation corresponding downlink data, cannot be received, so that no response message is fed back. This state is called the DTX state. The base station determines whether retransmission is required according to the HARQ-ACK sent by the terminal.
  • DTX Discontinuous Transmission
  • the HARQ-ACK response message can be separately sent on the Physical Uplink Control Channel (PUCCH). It can be sent with data on the Physical Uplink Shared Channel (PUSCH).
  • PUCCH Physical Uplink Control Channel
  • PUSCH Physical Uplink Shared Channel
  • the terminal In a frequency division duplex (FDD) system, since the uplink and downlink subframes are corresponding, when the physical downlink shared channel (PDSCH, Physical Downlink Shared Channel) contains only one codeword stream, the terminal needs to The 1-bit HARQ-ACK response message is fed back. When the PDSCH includes two codeword streams, the terminal feeds back a 2-bit HARQ-ACK response message. When the terminal does not transmit the PUSCH in the current subframe, the terminal will ⁇ on the PUCCH. use The format la or the format lb is used to transmit the 1-bit or 2-bit HARQ-ACK response message; and when the terminal has the PUSCH transmission in the current subframe, the terminal passes the 1-bit or 2-bit information to a certain HARQ-ACK state. The mapping to the corresponding bits, channel coding, scrambling, and modulation are multiplexed with the data and then transmitted on the PUSCH.
  • PDSCH Physical Downlink shared channel
  • the uplink and downlink subframes are not—corresponding, that is, the HARQ-ACK response message corresponding to multiple downlink subframes needs to be in the PUCCH/PUSCH of one uplink subframe.
  • the channel is sent, where the downlink subframe set corresponding to the uplink subframe constitutes a binding window.
  • two HARQ-ACK response message feedback modes are defined: One is HARQ-ACK bundling, as shown in Figure 1, the basic idea of the feedback mode is that it will need to be on the uplink.
  • the HARQ-ACK message of the codeword stream corresponding to each downlink subframe of the subframe is logically ANDed.
  • the terminal needs to feedback the logical operation and operation of the subframe.
  • the terminal feeds back the logical logic and operation corresponding to the codeword stream.
  • the terminal when the terminal does not have a PUSCH to transmit in the current subframe, the terminal will transmit the 1-bit or 2-bit HARQ-ACK response message in the format la or format lb on the PUCCH;
  • the terminal When there is PUSCH transmission in the current subframe, the terminal multiplexes the 1-bit or 2-bit information through a certain channel coding, channel interleaving, and data, and then transmits the information on the PUSCH.
  • the other is a HARQ-ACK multiplexing feedback mode. As shown in FIG.
  • the feedback mode needs to feed back one HARQ-ACK response message for each downlink subframe, and multiple subframes need to feed back multiple a HARQ-ACK response message
  • a PDSCH transmission of a downlink subframe includes two codeword streams
  • the terminal does not have a PUSCH to transmit in the current subframe, the terminal will transmit the multiple HARQ-ACK response messages by using the format lb with channel selection on the PUCCH.
  • HARQ-ACK response messages are represented by different PUCCH channels and different modulation symbols on the channel.
  • the method enables a portable HARQ-ACK response message to be up to 4 bits by channel selection in combination with the control channel format lb.
  • LTE defines different subframe configurations (that is, when the uplink and downlink subframe configurations are 1:2, 1:3, or 1:4, respectively)
  • HARQ-ACK A mapping relationship between the state combination of the response message and the selected PUCCH channel and the 2-bit information b(0) and b(1) carried on the channel (referred to as a mapping table).
  • the terminal uses HARQ-ACK bundling mode or HARQ-ACK multiplexing mode to feed back HARQ-ACK by higher layer configuration.
  • the discussion that follows is only sent on PUCCH for HARQ-ACK.
  • LTE-A Long Term Evolution Advanced
  • Rel-10 the corresponding standard protocol is Rel-10
  • CA Carrier Aggregation
  • a carrier to be aggregated is called a component carrier (CC), which is also called a serving cell.
  • CC component carrier
  • PCC/PCell Primary Component Carrier/Cell
  • SCC/SCell Secondary Component Carrier/Cell
  • SCC/SCell Secondary Component Carrier/Cell
  • LTE-A uses carrier aggregation technology
  • the base station configures multiple downlink serving cells for the terminal
  • the terminal needs to feed back HARQ-ACK response messages of the corresponding codeword streams of the multiple downlink serving cells.
  • HARQ-ACK response message is sent on the PUCCH
  • two feedback modes are defined: PU PUCCH format lb joint channel selection (Format lb with channel selection) and spread based on discrete Fourier transform Frequency feedback multiplexing (DFT-s-OFDM) feedback.
  • DFT-s-OFDM discrete Fourier transform Frequency feedback multiplexing
  • PUCCH format 3 PUCCH format 3
  • the terminal will feed back HARQ-ACK in PUCCH format lb joint channel selection; if the terminal can support Greater than 4 bits If the HARQ-ACK is fed back, the base station will further configure whether the terminal uses the PUCCH format lb joint channel selection method or the PUCCH format 3 to feed back HARQ-ACK 0 through high layer signaling.
  • the current protocol provides that, for the resource allocation of the PUCCH format 3, the terminal will jointly determine the HARQ-ACK resource indicator (ARI, ACK/NACK Resource Indicator) on the PDCCH corresponding to the PDSCH of the secondary serving cell and the PUCCH resource information of the high layer configuration.
  • the ARI field of the PDCCH reuses the transmission power control of the PDCCH (TPC, Transport Power is a power control command, but is used as an ARI, and assumes that the ARIs on the SCell have the same value.
  • the terminal when a terminal is configured with only one serving cell, the terminal can use one of the following three methods to feed back HARQ-ACK: TDD HARQ-ACK bundling, TDD HARQ-ACK multiplexing or PUCCH format 3.
  • the base station can use high-level signaling to indicate which way the terminal uses feedback.
  • the terminal is configured to use the PUCCH format 3 to feed back the HARQ-ACK, the current working assumption is that the channel resource of the PUCCH format 3 used by the terminal will be based on the received downlink allocation index (DAI, Downlink Assignment Index).
  • DAI Downlink Assignment Index
  • the TPC corresponding to the PDCCH greater than or equal to 2 and the PUCCH format 3 resource configured by the upper layer are determined, that is, the TPC corresponding to the PDCCH with the DAI value greater than or equal to 2 is used as the ARI, and the TPC corresponding to the PDCCH with the DAI value equal to 1 is used as the real TPC.
  • the terminal receives only one PDSCH without a PDCCH (that is, a Semi-Persistent Schedule (SPS)) and a PDSCH corresponding to a PDCCH with a DAI value equal to 1, how does the terminal feed back its corresponding HARQ-ACK? There is no corresponding solution.
  • SPS Semi-Persistent Schedule
  • SPS PDSCH PDSCH
  • DAI value a PDCCH having a DAI value equal to 1 for receiving an autonomous serving cell.
  • PDSCH physical downlink shared channel
  • DAI downlink allocation index
  • the PUCCH format lb joint channel selection is used to feed back the corresponding HARQ-ACK.
  • TPC received PDCCH/transmission power control
  • ARI ACK/NACK resource indicator
  • the corresponding PUCCH format 3 resource is determined according to the preset ARI value and the PUCCH format 3 resource configured by the upper layer, and then the corresponding HARQ-ACK message is fed back on the determined PUCCH format 3 resource.
  • the sending method further includes:
  • the terminal When receiving a PDSCH without a PDCCH in the binding window, the terminal selects a corresponding PUCCH format 3 resource according to a preset ARI value and a high-level configured PUCCH format 3 resource, and then the corresponding PUCCH format 3 resource. The corresponding HARQ-ACK message is fed back.
  • the pre-agreed PUCCH resource is a PUCCH resource corresponding to the PDCCH with the DAI value equal to 1.
  • the step of feeding back the corresponding HARQ-ACK in a PUCCH format lb joint channel selection manner includes:
  • the corresponding HARQ-ACK message is fed back in the same manner as the PUCCH format lb joint channel selection in the Rel-10 Frequency Division Duplex (FDD) system.
  • FDD Frequency Division Duplex
  • the step of feeding back the corresponding HARQ-ACK in a PUCCH format lb joint channel selection manner includes:
  • the PUCCH format lb joint channel selection when the Rel-10 Time Division Duplex (TDD) system is configured as one serving cell selects the corresponding HARQ-ACK message in the same manner.
  • TDD Time Division Duplex
  • a transmitting system for answering messages in a time division duplex system suitable for use in a terminal configured to transmit a hybrid automatic repeat request response message (HARQ-ACK) using a Physical Uplink Control Channel (PUCCH) format 3, the transmitting system
  • HARQ-ACK hybrid automatic repeat request response message
  • PUCCH Physical Uplink Control Channel
  • the first device and the second device are included, where: the first device is configured to: receive a physical downlink shared channel (PDSCH) from a serving cell in a binding window;
  • PDSCH physical downlink shared channel
  • the second device is configured to: when the first device receives, in the binding window, only one PDSCH without a PDCCH in the primary serving cell and a PDCCH corresponding to a downlink allocation index (DAI) value equal to 1 In the PDSCH, the corresponding HARQ-ACK message is fed back in one of the following ways:
  • the PUCCH format lb joint channel selection is used to feed back the corresponding HARQ-ACK.
  • the second device is configured to use the PUCCH format 3 to feed back the corresponding HARQ-ACK in the following manner:
  • TPC received transmission power control
  • ARI ACK/NACK resource indicator
  • the second device is configured to use the PUCCH format 3 to feed back the corresponding HARQ-ACK in the following manner:
  • the PUCCH format 3 resource then feeds back the corresponding HARQ-ACK message on the determined PUCCH format 3 resource.
  • the second device is further configured to: when the terminal is configured to use PUCCH format 3 to feed back a corresponding HARQ-ACK, and the first device receives a PDSCH without a PDCCH in the binding window.
  • the corresponding PUCCH format 3 resource is selected according to the preset ARI value and the high-level configured PUCCH format 3 resource, and then the corresponding HARQ-ACK message is fed back on the corresponding PUCCH format 3 resource.
  • the second device is configured to use the PUCCH format lb to feed back the corresponding HARQ-ACK in the following manner:
  • the HARQ-ACK of the PDSCH without the PDCCH and the HARQ-ACK of the PDSCH corresponding to the PDCCH with the DAI value of 1 are spatially bound to obtain a 2-bit pre-agreed PUCCH resource.
  • the pre-agreed PUCCH resource is a PUCCH resource corresponding to the PDCCH with the DAI value equal to 1.
  • the second device is configured to feed back the corresponding HARQ-ACK in a PUCCH format lb joint channel selection manner as follows:
  • the corresponding HARQ-ACK message is fed back in the same manner as the PUCCH format lb joint channel selection in the Rel-10 Frequency Division Duplex (FDD) system.
  • FDD Frequency Division Duplex
  • the second device is configured to feed back the corresponding HARQ-ACK in a PUCCH format lb joint channel selection manner as follows:
  • the corresponding HARQ-ACK message is fed back in the same manner as the PUCCH format lb joint channel selection when the Rel-10 Time Division Duplex (TDD) system is configured as one serving cell.
  • TDD Time Division Duplex
  • a solution for feeding back a HARQ-ACK response message is provided for a terminal that only receives a PDSCH without a PDCCH and a PDCCH with a DAI value equal to 1 to the autonomous serving cell, which is simple to implement and has high applicability. And will not affect existing agreements.
  • Figure 1 is a schematic diagram of the HARQ-ACK bundling mode
  • FIG. 2 is a schematic diagram of a HARQ-ACK multiplexing mode
  • FIG. 3 is a schematic diagram of a terminal use mode 1-1 feedback HARQ-ACK response message in the application example 1 of the present invention
  • FIG. 4 is a schematic diagram of a terminal use mode 1-1 feedback HARQ-ACK response message in Application Example 2 of the present invention
  • FIG. 5 is another schematic diagram of the terminal use mode 1-2 feedback HARQ-ACK response message in the application example 3 of the present invention.
  • FIG. 6 is a schematic diagram of a terminal use mode 2 feedback HARQ-ACK response message in the application example 4 of the present invention.
  • FIG. 7 is a schematic diagram of a terminal use mode 3-1 feedback HARQ-ACK response message in the application example 5 of the present invention.
  • FIG. 8 is a schematic diagram of a terminal using mode 3-1 feedback HARQ-ACK response message in Application Example 6 of the present invention.
  • FIG. 9 is a schematic diagram of a terminal using mode 3-1 feedback HARQ-ACK response message in the application example 7 of the present invention.
  • FIG. 10 is a schematic diagram of a terminal use mode 3-2 feedback HARQ-ACK response message in the application example 8 of the present invention.
  • FIG. 11 is a schematic diagram of a terminal use mode 3-2 feedback HARQ-ACK response message in the application example 9 of the present invention.
  • Preferred embodiment of the invention
  • the method for sending a response message in the time division duplex system is applicable to a terminal configured to use the PUCCH format 3 to feed back a HARQ-ACK response message, including:
  • the terminal uses any of the following methods to feed back the HARQ-ACK response. Message:
  • Mode 3 The PUCCH format lb joint channel selection is used to feed back the corresponding HARQ-ACK response message.
  • the binding window includes a time-frequency two-dimensional resource, and the time domain refers to a plurality of downlink subframes corresponding to one uplink subframe according to the uplink and downlink subframes, and the frequency domain refers to a serving cell or a carrier that is configured for the terminal.
  • the foregoing method 1 specifically includes the mode 1-1 and the mode 1-2:
  • Mode 1-1 The terminal determines the PUCCH format 3 resource according to the received TPC corresponding to the PDCCH with the DAI value equal to 1 and the PUCCH format 3 resource configured by the upper layer, and then feeds back corresponding information on the determined PUCCH format 3 resource n CH HARQ-ACK response message.
  • p is the antenna port number, which is 0 or 1.
  • the determining the corresponding PUCCH format 3 resource n CH according to the received TPC corresponding to the PDCCH with the DAI value equal to 1 and the PUCCH format 3 resource configured by the upper layer refers to: the TPC corresponding to the PDCCH that receives the received DAI value equal to 1.
  • the value is used as the value of the ARI, and the PUCCH format 3 resource n CH is determined in combination with the PUCCH format 3 resource of the high layer configuration. Since the TPC value has been used as the value of the API, accordingly, the terminal is equivalent to no TPC life. Order.
  • Manner 1-2 The terminal selects a corresponding PUCCH format 3 resource according to the preset ARI value and the PUCCH format 3 resource configured by the upper layer, and then feeds back a corresponding HARQ-ACK response message on the selected PUCCH format 3 resource.
  • the terminal uses mode 1-2 to feed back the corresponding HARQ-ACK response message.
  • the foregoing method 2 specifically includes: the terminal first performs spatial binding operation ( Spatial Bundling) on the received PDSCH without the PDCCH and the PDSCH corresponding to the PDCCH corresponding to the PDCCH with the DAI value equal to 1, and obtains 2 bits.
  • the HARQ-ACK response message is then sent by the PUCCH format lb on the pre-agreed PUCCH format la/lb resource to obtain the 2-bit HARQ-ACK response message obtained after spatial binding.
  • the pre-agreed PUCCH format la/lb resource may be a PUCCH resource corresponding to the PDCCH with the DAI value equal to 1.
  • the foregoing manner 3 specifically includes the mode 3-1 and the mode 3-2:
  • Mode 3-1 The terminal feeds back the corresponding HARQ-ACK message in the same manner as the PUCCH format lb joint channel selection in the Rel-10 FDD system;
  • Mode 3-2 When the terminal is configured with the Rel-10 TDD system as a one-month service cell
  • the PUCCH format lb joint channel selects the same manner to feed back the corresponding HARQ-ACK message.
  • the lower uplink subframe configuration value M is determined according to the uplink and downlink subframe configuration configured in the terminal.
  • the embodiment of the present invention further provides a sending system for a response message in a time division duplex system, which is applicable to a terminal configured to transmit a HARQ-ACK response message by using PUCCH format 3, where the sending system includes a device and a second device, wherein:
  • the first device is configured to: receive a PDSCH from a serving cell in a binding window;
  • the second device is configured to: when the first device receives only one PDSCH without a PDCCH in the primary serving cell and a PDSCH corresponding to a PDCCH with a DAI value equal to 1 in the binding window, according to the following One of the modes feeds back the corresponding HARQ-ACK response message:
  • Mode 3 The PUCCH format lb joint channel selection is used to feed back the corresponding HARQ-ACK response message.
  • the second device is configured to use the PUCCH format 3 to feed back the corresponding HARQ-ACK in the following manner:
  • TPC Transmission Power Control
  • ARI ACK/NACK resource indicator
  • the second device is configured to use the PUCCH format 3 to feed back the corresponding HARQ-ACK in the following manner:
  • the corresponding PUCCH format 3 resource is determined according to the preset ARI value and the PUCCH format 3 resource configured by the upper layer, and then the corresponding HARQ-ACK message is fed back on the corresponding PUCCH format 3 resource.
  • the system further comprises a third device:
  • the third device is configured to: when the first device receives one in the bound window
  • the corresponding PUCCH format 3 resource is selected according to the preset ARI value and the PUCCH format 3 resource configured in the upper layer, and then the corresponding HARQ-ACK message is fed back on the corresponding PUCCH format 3 resource.
  • the second device is further configured to use the PUCCH format lb to feedback the corresponding HARQ-ACK in the following manner:
  • the bit HARQ-ACK message is transmitted on the pre-agreed PUCCH resource by the PUCCH format lb mode.
  • the pre-agreed PUCCH resource is a PUCCH resource corresponding to the PDCCH with the DAI value equal to 1.
  • the second device is further configured to feed back the corresponding HARQ-ACK in a PUCCH format lb joint channel selection manner as follows:
  • the corresponding HARQ-ACK message is fed back in the same manner as the PUCCH format lb joint channel selection in the Rel-10 Frequency Division Duplex (FDD) system.
  • FDD Frequency Division Duplex
  • the second means is arranged to feed back the corresponding HARQ-ACK in a PUCCH format lb joint channel selection manner as follows:
  • the corresponding HARQ-ACK message is fed back in the same manner as the PUCCH format lb joint channel selection when the Rel-10 TDD system is configured as one serving cell.
  • the base station configures two serving cells for the terminal: the primary serving cell and the secondary serving cell, and configures the terminal to use the PUCCH format 3 to feed back the HARQ-ACK response message.
  • the terminal only receives a PDSCH without a PDCCH from the autonomous serving cell and a PDSCH corresponding to a PDCCH with a DAI value equal to 1, and assumes that the TPC value on the PDCCH with a DAI value equal to 1 is "01". " .
  • the terminal uses the foregoing mode 1-1 to feed back the HARQ-ACK response message
  • the TPC of the PDCCH with the DAI value equal to 1 is reused as the ARI, that is, the terminal is equal to 1 according to the received DAI value.
  • the TPC corresponding to the PDCCH and the PUCCH format 3 resource configured by the upper layer determine the PUCCH format 3 resource. According to Table 1, the terminal will use the PUCCH format 3 resource of the second higher layer to feed back the corresponding HARQ-ACK response message on PUCCH format 3.
  • the base station configures a primary serving cell for a terminal, and configures the terminal to use PUCCH format 3 to feed back a HARQ-ACK response message.
  • the terminal only receives a PDSCH without a PDCCH from the autonomous serving cell and a PDSCH corresponding to a PDCCH with a DAI value equal to 1, and assumes that the TPC value on the PDCCH with a DAI value equal to 1 is "01". " .
  • the terminal uses the foregoing mode 1-1 to feed back the HARQ-ACK response message
  • the TPC of the PDCCH with the DAI value equal to 1 is reused as the ARI, that is, the terminal is equal to 1 according to the received DAI value.
  • the TPC corresponding to the PDCCH and the PUCCH format 3 resource configured by the upper layer determine the PUCCH format 3 resource. According to Table 1, the terminal will use the PUCCH format 3 resource of the second higher layer to feed back the corresponding HARQ-ACK response message on PUCCH format 3.
  • Embodiments 1 and 2 it can be seen from Embodiments 1 and 2 that no matter how many serving cells are configured in the terminal, as long as it configures a PDSCH without a PDCCH and a PDSCH corresponding to a PDCCH with a DAI value equal to 1 of the primary serving cell, it feeds back the HARQ-ACK. The way is the same. Therefore, in the following embodiments, it is no longer described how many serving cells are configured by the terminal.
  • the base station needs to prevent the PUCCH format 3 resource used by the terminal from colliding with the PUCCH format 3 resource used by other terminals during scheduling.
  • Application example 3
  • the base station configures a terminal to use the PUCCH format 3 to feed back the HARQ-ACK response message. It is assumed that in a certain binding window, the terminal only receives a PDSCH without PDCCH and a PDCCH with a DAI value equal to 1 from the autonomous serving cell, and the corresponding relationship between the value of the ARI and the resource of PUCCH format 3 is as shown in Table 1.
  • the terminal determines the PUCCH format 3 resource according to the default ARI value and the PUCCH format 3 resource configured by the upper layer, and assumes that the default ARI value is "00". According to Table 1, the terminal will feed back the corresponding HARQ-ACK response message on PUCCH format 3 by using the PUCCH format 3 resource of the first higher layer configuration.
  • the terminal may have DTX (Discontinuous Transmission) in some subframes, that is, the base station schedules the PDSCH on a certain subframe, but since the terminal does not detect the corresponding PDCCH, it cannot detect it.
  • DTX Continuous Transmission
  • the base station schedules a PDSCH without a PDCCH, a PDSCH corresponding to a PDCCH having a DAI value equal to 1, and a PDSCH corresponding to a PDCCH having a DAI value equal to 2.
  • the terminal will send a corresponding HARQ-ACK response message on the PUCCH format 3 resource corresponding to the ARI with the DAI value equal to 2.
  • FIG. 5 shows that the base station schedules a PDSCH without a PDCCH, a PDSCH corresponding to a PDCCH having a DAI value equal to 1, and a PDSCH corresponding to a PDCCH having a DAI value equal to 2.
  • the terminal will use the default ARI corresponding.
  • the PUCCH format 3 resource sends a corresponding HARQ-ACK response message.
  • the base station side considers that the terminal sends a corresponding HARQ-ACK response message to the PUCCH format 3 resource corresponding to the ARI with the DAI value equal to 2.
  • the terminal uses the PUCCH format 3 corresponding to the default ARI.
  • the resource sends a corresponding HARQ-ACK response message, and the base station needs to blindly detect both cases.
  • the base station configures a terminal to use the PUCCH format 3 to feed back the HARQ-ACK response message.
  • the terminal only receives a PDSCH without a PDCCH from the autonomous serving cell and a PDSCH corresponding to a PDCCH with a DAI value equal to 1.
  • the terminal feeds back the HARQ-ACK response message in the above manner 2
  • the terminal First, a spatially bound BFD of a PDSCH without a PDCCH and a HARQ-ACK response message of a PDSCH corresponding to a PDCCH with a DAI value equal to 1 is obtained, and then a 2-bit HARQ-ACK response message is obtained, and then used.
  • the PUCCH format lb transmits the 2-bit HARQ-ACK response message obtained after the spatial bonding operation is performed on the PUCCH resource corresponding to the PDCCH including the DAI value equal to 1.
  • the PUCCH resource corresponding to the PDCCH with the DAI value equal to 1 is determined according to an implicit mapping relationship of a minimum CCE (Control Channel Element) index of the PDCCH with a DAI value equal to 1.
  • the terminal only receives a PDSCH without a PDCCH from the autonomous serving cell and a PDSCH corresponding to a PDCCH with a DAI value equal to 1.
  • the terminal uses the foregoing mode 3-1 to feed back the HARQ-ACK response message. That is, the corresponding HARQ-ACK message is fed back in a similar manner to the PUCCH format lb joint channel selection under the Rel-10 FDD system, specifically:
  • the feedback status determines (selects) a channel " ⁇ CCT ⁇ . b(0)b(l), then the selected b(0)b(l) is sent out on the selected "channel.”
  • the base station configures a terminal with PUCCH format 3 for feedback.
  • the terminal only receives a PDSCH without a PDCCH from the autonomous serving cell and a PDSCH corresponding to a PDCCH with a DAI value equal to 1.
  • the terminal uses the foregoing mode 3-1 to feed back the HARQ-ACK response message. That is, the corresponding HARQ-ACK message is fed back in a similar manner to the PUCCH format lb joint channel selection under the Rel-10 FDD system, specifically:
  • the terminal maps the HARQ-ACK response message corresponding to the SPS subframe to the HARQ-ACK.
  • Application Examples 5 and 6 differ in the processing of SPS subframes, in Application Example 5, Equivalent to mapping the codeword stream without PDSCH transmission in the SPS subframe to HARQ-ACK(l).
  • HARQ-ACK(l) needs to be set to the default value (NACK or DTX), but in the application.
  • NACK or DTX the default value
  • the SPS subframe transmission only contains one codeword stream, and therefore, the SPS subframe may correspond to only one HARQ-ACK response message.
  • the application example 6 has only three bits of the HARQ-ACK response message actually fed back, and thus Application Example 6 is a preferred scheme.
  • the terminal only receives a PDSCH without a PDCCH from the autonomous serving cell and a PDSCH corresponding to a PDCCH with a DAI value equal to 1.
  • the terminal uses the foregoing mode 3-1 to feed back the HARQ-ACK response message. That is, the corresponding HARQ-ACK message is fed back in a similar manner to the PUCCH format lb joint channel selection under the Rel-10 FDD system, specifically:
  • the terminal maps the HARQ-ACK response message of one codeword stream corresponding to the SPS subframe to the HARQ-ACK (0), and maps the HARQ-ACK response message of the PDCCH corresponding to the codeword stream of the PDSCH to the HARQ-ACK message of the PDSCH.
  • the terminal only receives a PDSCH without a PDCCH from the autonomous serving cell and a PDSCH corresponding to a PDCCH with a DAI value equal to 1.
  • the terminal uses the above manner 3-2 to feed back the HARQ-ACK response message. That is, the corresponding HARQ-ACK message is fed back in the same manner as the PUCCH format lb joint channel selection when a serving cell is configured in the Rel-10 TDD system, specifically:
  • the mapping table used in the PUCCH format lb joint channel selection when a serving cell is configured in the Rel-10 TDD system is configured by higher layer signaling, and can be configured to use the mapping table shown in Table 5, or configured as Table 6.
  • the terminal only receives one of the incoming autonomous serving cells without PDCCH.
  • the format lb joint channel selects the same manner to feed back the corresponding HARQ-ACK message, specifically, it includes:
  • mapping table of M 3 when PUCCH format lb joint channel selection
  • mapping table of M 2 when PUCCH format lb joint channel selection
  • the terminal of the PDSCH and a PDCCH with a DAI value equal to 1 provides a solution for feeding back the HARQ-ACK response message, which is simple to implement, highly applicable, and does not affect the existing protocol. Therefore, the present invention has strong industrial applicability.

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

Abstract

L'invention concerne un procédé et un système destinés à l'envoi d'un message d'accusé de réception dans un système à duplexage par répartition dans le temps, qui sont adaptés à un terminal conçu pour renvoyer un message d'accusé de réception de demande de répétition automatique hybride (HARQ-ACK) au moyen d'un canal de commande de liaison montante physique (PUCCH) format 3. Ledit procédé comprend : la réception d'un canal partagé de liaison descendante physique (PDSCH) en provenance d'une cellule de desserte dans une fenêtre de liaison ; et le renvoi du HARQ-ACK correspondant lors de la seule réception du PDSCH sans PDCCH en provenance d'une cellule de desserte primaire et du PDSCH correspondant à un PDCCH ayant une valeur d'indice d'attribution de liaison descendante égale à 1 dans la fenêtre de liaison. Ce renvoi du HARQ-ACK correspondant s'effectue selon l'un des procédés suivants : renvoi du HARQ-ACK correspondant au moyen d'un PUCCH format 3 ; renvoi du HARQ-ACK correspondant au moyen d'un PUCCH format 1b ; renvoi du HARQ-ACK correspondant au moyen d'un PUCCH format 1b et à l'aide d'un procédé de sélection de canal. La présente invention n'affecte en aucune manière le protocole existant.
PCT/CN2011/084975 2011-04-01 2011-12-30 Procédé et système destinés à l'envoi d'un message d'accusé de réception dans un système à duplexage par répartition dans le temps WO2012129952A1 (fr)

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