WO2009074096A1 - Procédé et dispositif de prise en charge de transmission bidirectionnelle - Google Patents

Procédé et dispositif de prise en charge de transmission bidirectionnelle Download PDF

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Publication number
WO2009074096A1
WO2009074096A1 PCT/CN2008/073311 CN2008073311W WO2009074096A1 WO 2009074096 A1 WO2009074096 A1 WO 2009074096A1 CN 2008073311 W CN2008073311 W CN 2008073311W WO 2009074096 A1 WO2009074096 A1 WO 2009074096A1
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Prior art keywords
stream
information
sich
dual
channel
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PCT/CN2008/073311
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English (en)
Chinese (zh)
Inventor
Yu Yang
Jie Bai
Haijun Zhou
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Da Tang Mobile Communications Equipment Co., Ltd.
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Publication of WO2009074096A1 publication Critical patent/WO2009074096A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/30—Network data restoration; Network data reliability; Network data fault tolerance

Definitions

  • the present invention relates to a high speed downlink packet access (HSDPA) technology in the field of mobile communication technologies, and in particular to an uplink high speed shared information channel (HSS) supported by an uplink information channel (HS-SICH).
  • HSDPA high speed downlink packet access
  • HSS uplink high speed shared information channel
  • H-SICH uplink information channel
  • a method for performing dual data stream transmission on a High Speed Downlink Shared Channel (HS-DSCH) a method for implementing a base station to support dual stream transmission, and a base station.
  • the 3rd Generation Partnership Project introduced HSDPA technology in the R5 protocol, which uses a shared downlink channel for data transmission, which can significantly Improve the transmission rate of downlink data to achieve higher data throughput.
  • the high-speed service bearer of HSDPA is mainly implemented by the high-speed downlink shared channel HS-DSCH, which is a dedicated data transmission channel of HSDPA, which is called HS-PDSCH (High Speed Physical Downlink) when mapped to the physical channel. Shared Channel, HS-PDSCH ).
  • HS-DSCH high-speed downlink shared channel
  • HS-PDSCH High Speed Physical Downlink
  • shared Control Channel shared Channel
  • the HS-DSCH is used to carry data bits
  • the shared control channel HS-SCCH is used to carry control signaling of the traffic channel, that is, it is responsible for carrying control information and scheduling information required for decoding the HS-DSCH channel, and the user terminal.
  • the device (UE) receiving the HS-DSCH data must be completed with the cooperation of the HS-SCCH control information; the uplink control channel HS-SICH is responsible for carrying the hybrid automatic retransmission request (Hybrid Automatic Request) transmitted on the HS-DSCH channel.
  • HARQ The acknowledgement information (Acknowledgment/Negative Acknowledgment, ACK/NACK information) and Channel Quality Indicator (CQI) information, HS-SICH uses a Spreading Factor (SF) of 16 The code channel is used in pairs with the HS-SCCH.
  • SF Spreading Factor
  • the base station When there is downlink data to be transmitted on the HS-DSCH, the base station (Node B) first
  • the downlink control information and the scheduling information are sent on the HS-SCCH channel, and the UE obtains control information necessary for decoding the data on the HS-DSCH channel by detecting the HS-SCCH channel, and then receives the HS- according to the acquired control information.
  • the data block on the DSCH the UE then feeds back the channel quality indicator (CQI) and the ACK/NACK information of the downlink data to the base station (Node B) through the HS-SICH channel, so that the Node B knows whether the data block is correctly received and the Node B and the Channel quality between UEs. Based on the feedback, Node B can decide whether to retransmit the data and adaptively adjust the modulation and coding mode of the shared data channel.
  • the HS-DSCH related signaling information transmitted on the HS-SICH channel includes: acknowledgment/non-acknowledgement ACK/NACK information (bit) and channel quality indication CQI information, wherein the CQI information includes a UE recommended modulation format (Preference Modulation. Format, RMF) information (lbit) and UE recommended transport block size (TBS) information (6bits).
  • CQI information includes a UE recommended modulation format (Preference Modulation. Format, RMF) information (lbit) and UE recommended transport block size (TBS) information (6bits).
  • ACK/NACK information For ACK/NACK information, if the data block transmitted on the downlink HS-DSCH is correctly received by the UE, the response information will be transmitted to the Node B, otherwise the UE will feed back a negative acknowledgement message (NACK) ⁇ Node B; for the CQI information,
  • the Node B is configured to select an appropriate modulation and coding mode according to the channel condition in which the UE is located, and the UE needs to feed back the received channel quality information to the Node B.
  • This quality information is the transmission resource of the next data transmission recommended by the UE, including the size and modulation mode of the transport block set, and there are 7 bits in total.
  • TD-SCDMA Multiple Input Multiple Output
  • the HSDPA system supports up to dual stream transmission on the downlink.
  • it is required to feed back the HARQ acknowledgment information of the UE to the received dual-stream data to the Node B on the HS-SICH channel, and recommend to the Node B in the next transmission time interval (Teleration Time Interval, TTI)
  • TTI Transmission Time Interval
  • the ACK/NACK information and the CQI information signaling bits of the HS-SICH channel in the HSDPA system can only indicate the correctness of the UE receiving a single data stream and the channel shield when the UE receives a single data stream.
  • the Node B cannot be fed back to the Node B for confirmation of the received dual stream data, and the number of data streams in the next transmission time slot TTI and the transport block size and modulation mode on each data stream are recommended to the Node B.
  • An object of the present invention is to provide a method and an apparatus for supporting dual-stream transmission in an uplink high-speed shared information channel, so as to overcome the shortcomings of the HSDPA system in which the HS-SICH channel cannot support dual-stream transmission in the prior art, and the HS-SICH channel supports dual-stream transmission.
  • the HSDPA system improves the data transmission rate and capacity of the TD-SCDMA system.
  • the present invention provides a method for supporting dual-stream transmission in an uplink high-speed shared control channel, including the following steps:
  • the UE encodes the HS-SICH channel control information and sends it to the Node B;
  • Node B performs corresponding decoding on the encoded control information on the HS-SICH;
  • the Node B is decoded by the HS-SICH control information, and determines whether to retransmit the data and the transmission format of the next data transmission.
  • the present invention further provides a method for implementing a base station to support dual stream transmission, including: a) Node B performs corresponding decoding on the encoded control information on the HS-SICH; b) Node B according to the decoded HS-SICH control information, Decide whether to retransmit the data and the transmission format of the next data transmission.
  • the present invention also provides a base station, including:
  • a decoding unit configured to perform corresponding decoding on the encoded control information on the HS-SICH supporting single stream and dual stream transmission;
  • the data transmission control unit is configured to determine whether to retransmit the data and the transmission format of the next data transmission according to the decoded HS-SICH control information.
  • the present invention has the following advantages:
  • the present invention sets the HS-SICH control information respectively supporting single stream and dual stream transmission, and is in the pair After the control information is encoded, the Node B decodes the encoded control information, so that the Node B can decide whether to retransmit the data and adjust the modulation of the downlink shared channel HS-DSCH according to the control information such as the decoded HARQ acknowledgment information and CQI information. Encoding. Therefore, the present invention enables the HS-SICH channel in the TDD system to support dual data stream transmission on the HS-DSCH. With the present invention, the data transmission efficiency of the system and the data throughput of the HSDPA system can be improved.
  • FIG. 1 is a flow chart of a method for supporting dual-stream transmission of an uplink high-speed shared information channel provided by the present invention
  • FIG. 3 is a flowchart of Embodiment 1 of an HS-SICH channel coding method provided by the present invention
  • FIG. 4 is a flowchart of a method for receiving control information on an HS-SICH channel by a Node B according to the coding method shown in FIG. 3;
  • FIG. 5 is a flowchart of Embodiment 2 of the HS-SICH channel coding method provided by the present invention
  • FIG. 6 is a flowchart of a method for receiving control information on the HS-SICH channel by the Node B according to the coding method shown in FIG. 5;
  • FIG. 7 is a flowchart of Embodiment 3 of an HS-SICH channel coding method provided by the present invention
  • FIG. 8 is a flowchart of a method for receiving control information on an HS-SICH channel by a Node B according to the coding method shown in FIG. 7;
  • FIG. 9 is a flowchart of Embodiment 4 of an HS-SICH channel coding method provided by the present invention.
  • FIG. 10 is a burst format diagram of an HS-SICH channel;
  • FIG. 11 is a flowchart of a method for receiving control information on an HS-SICH channel by a Node B according to the coding method shown in FIG. 9;
  • FIG. 12 is a schematic diagram of a first embodiment of a base station according to the present invention.
  • FIG. 13 is a schematic diagram of a second embodiment of a base station according to the present invention.
  • FIG. 14 is a schematic diagram of a third embodiment of a base station according to the present invention.
  • the base station Node B first informs the UE of the corresponding HS-DSCH information through the HS-SCCH, including the user identifier, the HS-PDSCH code channel resource, the modulation mode, and the like. Then, after a predetermined time, data is transmitted on the HS-DSCH.
  • the UE monitors the HS-SCCH and determines whether the time information belongs to the UE by identifying the user equipment identity information (UE ID information). If yes, the shared channel HS-DSCH is received and decoded according to the information carried by the HS-SCCH to obtain data.
  • UE ID information user equipment identity information
  • the base station Node B can decide whether to retransmit the data and adaptively adjust the modulation and coding mode of the downlink shared channel HS-DSCH.
  • the current HSDPA system is configured by the high-level Radio Resource Control (RRC) signaling to work in the MIMO mode or the non-MIMO mode, that is, the high-level according to the real-time service type, the user data volume, and the channel environment. And other factors to determine which mode the HSDPA system takes in a certain time frame.
  • RRC Radio Resource Control
  • the non-MIMO mode is the working mode in which the MIMO technology is not introduced in the HSDPA system.
  • the HS-SICH channel in HSDPA is divided into two types: a MIMO mode HS-SICH channel and a non-MIMO mode HS-SICH channel.
  • the HSDPA system selects single-stream transmission or dual-stream transmission according to the channel condition.
  • the MIMO mode does not always use dual streams to transmit data.
  • the channel conditions are poor, in order to ensure the transmission of data, It is necessary to switch to single-stream transmission, and when the channel conditions are better, switch to dual-stream transmission. Therefore, in the composition of the HS-SICH channel of the MIMO mode, the signaling information contained therein can support both single-stream transmission and dual-stream transmission, while the single- and dual-stream HS-SICH channels have different channel structures. , signaling information sequence length and different coding schemes.
  • Step S101 Set HS-SICH channel control information respectively supporting single stream and dual stream transmission. Specifically, the working mode of the current HSDPA system is detected, and the HS-SICH channel control information of the corresponding mode is set according to the working mode of the HSDPA system.
  • the HARQ acknowledgment information and the CQI information conforming to the transmission conditions of the single and dual stream data are set, and for the HS-SICH channel of the non-MIMO mode, the HARQ acknowledgment information and the CQI information supporting the single stream transmission are set.
  • the CQI information includes two parts of the RTBS information and the RMF information.
  • Step S102 The UE encodes the HS-SICH channel control information and sends the information to the Node B.
  • Step S104 The Node B determines whether to retransmit the data and the transmission format of the next data transmission according to the decoded HS-SICH control information.
  • step S104 based on the HARQ acknowledgment information of the decoded HS-SICH channel, the Node B determines whether to retransmit the previously transmitted data, and adjusts the HS-DSCH shared channel according to the CQI information of the decoded HS-SICH channel.
  • the modulation mode of the data and the transport block size are used.
  • the present invention obtains signaling information of an HS-SICH channel supporting the HS-DSCH channel for dual stream transmission by amplifying and modifying the signaling information of the existing HS-SICH.
  • the HARQ acknowledgment information, the recommended modulation format RMF information, and the recommended transport block size RTBS information on the HS-SICH since the HSDPA system configures whether it is in the MIMO operation mode according to the high layer RRC signaling, the following is given in the MIMO mode and the non-MIMO mode, respectively.
  • the present invention adds an indication of downlink 64 Quadrature Amplitude Modulation (QAM) to the current HS-SICH channel.
  • QAM Quadrature Amplitude Modulation
  • the sequence length of the information is set to 2 bits, that is, lbit is added to the existing lbit length to indicate three modulation modes: Quaternary Phase Shift Keying (QPSK), 16QAM, and 64QAM.
  • QPSK Quaternary Phase Shift Keying
  • 16QAM 16QAM
  • 64QAM 64QAM
  • RTBS Recommended transport block size
  • the sequence length of the RTBS information is set to 6 bits, which is the same as that specified in the 3GPP 5 protocol.
  • 64QAM a new UE capability TBS table supporting 64QAM is needed.
  • the size of the new TBS table can be made consistent with the size of the TBS table in the existing specification, that is, the index number in the new TBS table is 0-63 0
  • the RTBS information may be extended by a few bits, for example, to 8 bits, to represent a new TBS table supporting 64QAM, where the size of the new TBS table is greater than 64, that is, greater than the existing The TBS table size in the 3GPP R5 protocol, and for the old TBS table supporting QPSK and 16QAM in the existing specification, the lower 6 bits are still used to represent the TBS, and the high bit is 0.
  • the various control information on the specific HS-SICH are set as follows:
  • the present invention indicates the acknowledgment information for the single stream and the dual stream, respectively, wherein the HARQ acknowledgment information is set to a different sequence length according to whether each of the data streams in the dual data stream is individually indicated.
  • the specific settings are as follows:
  • a HARQ acknowledgment message supporting a single stream has a sequence length of 1 bit, indicating a acknowledgment (NACK) with a bit "0", and indicating a response (ACK) with a bit "1";
  • the sequence length of the HARQ acknowledgment information indicated separately for each data stream when the dual stream is supported is 2 bits, and each data stream uses 1 bit each to represent ACK or NACK information.
  • the present invention will support the data flow in the dual stream.
  • the HARQ confirmation information of the joint indication is set to 2 bits.
  • RMF Recommended modulation method
  • the HS-SICH channel of the MIMO mode supports the downlink 64QAM at the same time, and the single and dual streams are not uniformly indicated, in view of the fact that the data stream has three modulation modes: QPSK:, 16QAM, and 64QAM, the sequence of RMF information supporting the single stream is set.
  • the length is 2 bits;
  • each data stream in the dual stream needs to be separately indicated, each data stream has three modulation modes: QPSK, 16QAM, and 64QAM, and each data stream needs 2 bits to indicate the modulation mode, thereby setting support for dual streams and each data stream.
  • the sequence length of the separately indicated RMF information is 4 bits;
  • the two data streams When it is required to jointly indicate two data streams in the dual stream, i) pre-fix the order of the two data streams, and the two data streams have a total of nine modulation combinations, namely: QPSK-QPSK, QPSK-16QAM, QPSK-64QAM, 16QAM-QPSK, 16QAM-16QAM, 16QAM-64QAM, 64QAM-QPSK, 64QAM-16QAM. 64QAM-64QAM, so it is necessary to set the sequence length of RMF information supporting dual stream and joint indication of two data streams to 4 bits; ii) to channel The data stream with better condition is the mainstream, and the data stream with poor channel condition is the auxiliary stream.
  • the HS-SICH channel of the MIMO mode does not support the downlink 64QAM at the same time, and when the single and dual streams are not uniformly indicated, in view of the fact that the data stream has two modulation modes, QPSK and 16QAM, the sequence length of the RMF information supporting the single stream is set to 1 bit;
  • each data stream in the dual stream needs to be separately indicated, each data stream has QPSK, 16QAM, and two modulation modes, and each data stream needs 1 bit to indicate the modulation mode, thereby setting support for dual streams and each data stream is separate.
  • the sequence length of the indicated RMF information is 2 bits;
  • the HS-SICH channel of the MIMO mode does not support the downlink 64QAM at the same time, and the single and dual stream unified indication, i) pre-fixes the order of the two data streams, and the data stream transmitted on the HS-SICH channel has a total of six modulation modes. , namely: QPSK-None, 16QAM-None, QPSK-QPSK, QPSK-16QAM, 16QAM-QPSK, 16QAM-16QAM, so it is necessary to set the sequence length of RMF information that supports 64QAM at the same time and the single and dual stream unified indication is 3 bits; Ii) The data stream with better channel conditions is the mainstream, and the data stream with poor channel conditions is the auxiliary stream.
  • the data stream transmitted on the HS-SICH channel has five combinations of modulation modes, namely: QPSK-none, 16QAM-none, QPSK-QPSK, 16QAM-QPSK, 16QAM-16QAM, therefore, it is necessary to set the sequence length of RMF information that supports 64QAM and single and dual stream unified indications at different times to be 3 bits.
  • the RMF information may be removed, and the RMF information may be implicitly represented. That is, the Node B calculates the modulation mode recommended by the UE according to the resource occupancy of the previous time slot code channel and the RTBS fed back by the UE. Referring to Figure 2, the specific process is as follows:
  • Step S201 The RNC configures the mapping relationship between the code rate and the channel condition (power, signal to noise ratio, and signal to interference ratio) in different modulation modes to the UE and the Node B, respectively.
  • Step S202 After the UE feeds back the RTBS, the Node B calculates the code rate according to the code channel resource.
  • Step S203 The Node B searches for the mapping relationship of the C configuration according to the calculated code rate, and acquires channel conditions (power, signal to noise ratio, and signal to interference ratio) corresponding to each modulation mode at the code rate.
  • Step S204 The modulation mode corresponding to the channel condition with the smallest value is used as the modulation mode recommended by the UE to the Node B.
  • the modulation mode corresponding to the channel condition with the smallest value is used as the modulation recommended by the UE to the Node B. the way.
  • the Node B has learned the modulation mode recommended by the UE, and does not need to perform the decoding step as described in step S103 to decode the learned RMF.
  • RTBS Recommended transport block size
  • the number of data streams is implicitly represented by the size of the decimal value of the RTBS index number, and the dual stream uses separate TBS index numbers,
  • Mx Indexl + Index2 + 64 RTBS index number (decimal) in MIMO mode in ⁇ u ⁇ e ⁇ x single , where M is the TBS table size used by the two data streams, and Indexl and Index2 are the two data streams respectively.
  • the number of data streams is implicitly represented by the size of the RTBS index number decimal value, and the dual stream uses one TBS table to share one TBS index number, and the index numbers are respectively used for Two streams of two TBS, then this time
  • Index is the decimal index number of the TBS table shared by the dual stream (M is the size of the TBS table used for the dual stream;)
  • Index Su ⁇ is the TBS index corresponding to the single stream, and the value is 0 to 63, then the MIMO mode
  • M is the size of the TBS table used for the dual stream
  • Index Su ⁇ is the TBS index corresponding to the single stream, and the value is 0 to 63, then the MIMO mode
  • M the MIMO mode
  • the UE direction can be known.
  • the number of data streams recommended by Node B is single stream or dual stream.
  • the number of data streams is implicitly represented by the size of the decimal value of the RTBS index number, and the dual stream uses the respective independent TBS indexes to jointly indicate
  • the sequence length of the RTBS information supporting the single stream is set to 6 bits, which is the same as that specified in the 3GPP R5 protocol.
  • 64QAM if you need to support 64QAM at the same time, you need to add a new UE capability TBS table that supports 64QAM.
  • the RTBS information supporting the single stream may be extended by several bits, for example, to 8 bits, to represent a new TBS table supporting 64QAM, where the size of the new TBS table is greater than 64, That is, it is larger than the TBS table size specified in the existing 3GPP R5 protocol, and for the old TBS table in the existing specification, the lower 6 bits are still used to represent the TBS, and the high bit is 0.
  • the number of data streams is implicitly represented by the size of the decimal value of the RTBS index number, and the dual stream uses one TBS table to share a joint indication of one TBS index number, and the index number corresponds to Two TBSs for dual streams are used.
  • the sequence length of the RTBS information supporting the single stream is set to 6 bits, which is the same as that specified in 3GPP R5 1 ⁇ 4.
  • 64QAM if you need to support 64QAM at the same time, you need to add a new UE capability TBS table that supports 64QAM.
  • the RTBS information supporting the single stream may be extended by several bits, for example, to 8 bits, as needed.
  • M 64
  • sequence length of the RTBS information needs to be set to 6 bits.
  • N log 2 (M)
  • the present invention can add 1 bit of recommended data stream number signaling (RSN: Recommended Stream Number) to the HS-SICH channel to specifically Represents the number of data streams, not implicitly represented in the RTBS information.
  • RSN Recommended Stream Number
  • the HS-SICH includes RSN information indicating the number of data streams.
  • sequence length of each of the above control information is only an optimal length, and the sequence length of each control information may be other length values not less than the above specific value.
  • the present invention provides the following methods for encoding all control information on the HS-SICH channel and a corresponding method for decoding the control information by the Node B to obtain an indication. Whether the data block correctly receives ACK/NACK information and CQI information indicating the channel shield of the current UE.
  • FIG. 3 is a flowchart of Embodiment 1 of an HS-SICH channel coding method provided by the present invention.
  • the specific coding process is as follows:
  • Step S301 separately encode each part of the control information on the HS-SICH channel.
  • Step S302 multiplexing the control information outputted by the encoding.
  • Step S303 Interleaving.
  • Step S304 Physical channel mapping.
  • the physical channel mapping maps the interleaved output bitstream to the corresponding assigned code channel.
  • the decimal value of the RTBS index number in the RTBS information on the HS-SICH channel implicitly indicates the number of data streams recommended by the UE to the Node B in the MIMO mode.
  • step S301 in the non-MIMO mode and the MIMO mode, the control information of each part of the HS-SICH channel has different coding implementation manners.
  • the UE confirms the correctness of the received single stream data.
  • the 1 bit of the ACK/NACK signaling is repeatedly encoded by (36, 1), and the encoded output is 36 bits.
  • RMF information In view of the fact that the non-MIMO mode HS-SICH channel provided by the present invention increases the indication of downlink 64QAM, there are three modulation modes, namely QPSK, 16QAM, and 64QAM. If the RMF uses a 2-bit sequence length, this embodiment uses the (16, 2) block coding of the 2 bits of the RMF information, such as RM (Reed-Muller) coding, at which time the coded output is 16 bits.
  • RM Read-Muller
  • the Node B calculates the modulation mode recommended by the UE according to the resource occupancy of the previous time slot code channel and the RTBS fed back by the UE. See the specific process described in FIG. 2 above.
  • the high-level signaling needs to configure the code rate and channel conditions (power, signal-to-noise ratio, and signal-to-noise) in different modulation modes for the Node B and the UE when the link is initially established.
  • the mapping relationship In this case, in order to make the understanding of the modulation mode of the Node B and the UE consistent, the high-level signaling needs to configure the code rate and channel conditions (power, signal-to-noise ratio, and signal-to-noise) in different modulation modes for the Node B and the UE when the link is initially established.
  • the mapping relationship is configured.
  • a new TBS table supporting UE capabilities of 64QAM is added.
  • the size of the TBS table may be the same as other existing UE capability TBS tables in the existing specification TS 25.321, that is, the index number of the TBS table is 0 to 63, and there are 64 kinds of values, so 6 bits are used to represent the RTBS information.
  • (32, 6)-order RM coding is used, and at this time, the RTBS information coding output is 32 bits.
  • the UE can know the number of data streams by receiving the HS-SCCH channel, and confirm the correctness of the data reception by using the ACK/NACK information after receiving the single stream or the dual stream data.
  • the UE uses the number of data streams received according to the number of data streams received by the UE:
  • Coding method 1 If the UE receives single-stream data, it uses 1 bit of ACK/NACK signaling.
  • Coding mode 2 If the UE receives the dual stream data, the ACK/NACK signaling of the dual stream is separately encoded. One bit is used for each data stream for correctness confirmation. Each bit of each data stream adopts independent (18, 1) repetition coding, so the ACK/NACK information of each data stream outputs 18 bits, then the dual stream The total length of the ACK/NACK signaling is 36 bits.
  • Coding mode 3 If the UE receives the dual stream data, the ACK/NACK signaling of the dual stream is jointly coded.
  • ACK/NACK signaling There are four possible combinations of dual-stream ACK/NCAK signaling, namely ACK-ACK, ACK-NACK, NACK-ACK, NACK-NACK, and ACK/NCAK signaling uses 2 bits.
  • block coding of (36, 2) is adopted. , such as RM encoding, and try to increase the Hanmming distance between each code word. At this time, the length after ACK/NACK encoding is 36 bits.
  • RMF information Since the MIMO mode can be considered to support 64QAM at the same time or 64QAM at the same time, the sequence bit length of the RMF information is different in both cases, but in this embodiment, the RMF information in two cases
  • the coding scheme is the same, and the specific coding method is as follows:
  • Coding mode 1 When the single and dual streams are not uniformly indicated, each data stream in the dual stream is separately coded. If the UE feeds back the RMF of the single stream, it uses an encoding method such as block coding or repetition coding to output 16 bits.
  • each data stream performs independent RMF signaling indication, and respectively adopts independent packet coding or repetition coding, and the RMF coding output of each data stream is 8 bits, then the dual stream RMF information coding The total length afterwards is 16 bits.
  • this embodiment can further increase the sequence length of the encoded output to improve the encoding performance.
  • Coding mode 2 When the single and dual streams are not uniformly indicated, the two data streams in the dual stream are jointly coded. If the UE feeds back the RMF of the single stream, it uses an encoding method such as block coding or repeated coding. The code outputs 16 bits.
  • the dual-stream modulation mode is combined with RMF signaling to jointly indicate and perform block coding (such as RM coding).
  • block coding such as RM coding
  • the combination of dual-stream modulation modes includes QPSK-QPSK: QPSK-16QAM, 16QAM-QPSK, and 16QAM-16QAM.
  • RMF signaling requires 2 bits, and then 2 bits (16, 2) RM code.
  • Coding method 3 Coding when single and dual stream are unified indication.
  • the RMF when the single stream is fed back is jointly indicated with the RMF when the stream is dual stream.
  • the combination of modulation modes of the single and dual streams includes QPSK-None, 16QAM-None, QPSK-QPS:, QPSK-16QAM, 16QAM-
  • QPSK QPSK-None
  • 16QAM-None QPSK-QPS:
  • QPSK-16QAM 16QAM-
  • Coding method 4 When the RMF signaling is removed on the HS-SICH channel, and the modulation method is expressed by using the existing implicit representation method similar to HSUPA, then the Node B according to the previous time slot code channel and other resource occupation situation and the present The RTBS information fed back by the secondary UE is used to calculate the modulation mode. For details on the process of recommending the modulation mode, refer to the process description in Figure 2 above. Since the Node B has learned the modulation mode recommended by the UE through the step flow described in FIG. 2, the decoding step as described in step S103 is not required.
  • the index number is 0 - 63
  • the TBS table index number used for each data stream in dual stream is 0 ⁇ (M-1), where M can be consistent with the existing specification to take 64, or
  • the single-stream MIMO mode RTBS index number (decimal) Index single (single stream TBS table index number)
  • dual stream MIMO mode RTBS index number (decimal) Mxlndexl + Index2 + 64
  • M is the TBS table size used by the two data streams
  • Indexl and Index2 are the TBS table index numbers of each stream in the dual stream, respectively).
  • the RTBS index number decimal values of the two streams are jointly calculated and converted into binary.
  • the coded output is 32 bits.
  • the encoded output of the RTBS information is multiplexed with the encoded output of the RMF information.
  • Node B needs to be on the HSDPA system.
  • the HS-SICH channel is detected (decoded) to obtain ACK/NACK information indicating whether the data block is correctly received and CQI information indicating the channel quality between the Node B and the UE.
  • the method for the base station Node B to receive the control information on the HS-SICH channel is as follows: Step S401: The Node B learns the working mode of the HSDPA system in the current time according to the high layer RRC signaling.
  • the Node B learns, according to the high layer RRC signaling, whether the working mode of the HSDPA system is the MIMO mode or the non-MIMO mode in the current time.
  • Step S402 According to the working mode of the HSDPA system, the Node B performs decoding by using an inverse process of HS-SICH coding.
  • control information of each part of the HS-SICH channel has different coding implementation manners.
  • the step lemon reads the channel information from the physical channel carrying the HS-SICH, deinterleaves and demultiplexes, and separates each signaling information according to the length of each signaling code and the order of discharge, for each signaling Decoding separately can obtain RTBS, RMF and ACK/NACK signaling.
  • the ACK/NACK information is obtained by decoding the data of the ACK/NACK domain, so as to know whether the data packet on all the data streams is correctly received by the UE during the last transmission, and if it is an ACK, it is ready to send a new data packet, such as For NACK, the last packet needs to be retransmitted according to the HARQ parameter settings.
  • This embodiment also learns the RTBS information by decoding the data of the CQI domain.
  • the number of data streams to be sent by the UE to the Node B may be implicitly learned by using the RTBS information (for example, the size of the RTBS index number in the above solution may be used to distinguish between single and dual streams), and each data stream is used.
  • the size of the TBS may be used to distinguish between single and dual streams.
  • the RMF information is also learned by decoding the data of the CQI domain.
  • the Node B determines the modulation scheme used on each data stream at the next transmission based on the RMF information obtained by the decoding. If the RMF signaling is implicitly indicated, the Node B calculates the modulation mode based on the resource occupancy of the previous time slot code channel and the RTBS fed back by the UE.
  • FIG. 5 it is a flowchart of Embodiment 2 of an HS-SICH channel coding method provided by the present invention.
  • the signaling information of the number of data streams in the feedback MIMO mode is still not added to the HS-SICH channel, but the Node B is implicitly notified according to different coding modes of the single-pair stream signaling.
  • the signaling information of each part of the HS-SICH channel is first multiplexed together, and then jointly coded.
  • the coding steps of the HS-SICH channel signaling in the MIMO mode are similar to those in the non-MIMO mode. Referring to FIG. 5, the specific steps are as follows:
  • Step S501 multiplex ACK/NACK information, RMF information (if not implicitly indicated), and RTBS information on the HS-SICH channel.
  • RMF information is multiplexed only when the RMF information is not removed and the recommended modulation scheme is not implicitly indicated.
  • Step S502 Add CRC to the multiplexed HS-SICH channel control information.
  • the Cyclic Redundancy Check can help to perform block error statistics and is used to assist the outer loop power control.
  • the CRC may not be added, or the CRC may be XORed with the User Equipment Identity (UE ID) information.
  • UE ID User Equipment Identity
  • Step S503 Channel coding.
  • encoding by using a convolutional code can overcome the error of control signaling during transmission.
  • Step S504 Perform rate matching.
  • Step S505 Interleaving.
  • Step S506 Physical channel mapping.
  • the Node B needs to detect (decode) the HS-SICH channel of the HSDPA system, thereby obtaining ACK/NACK information indicating whether the data block is correctly received and indicating the channel between the Node B and the UE. Quality CQI information.
  • the method for the base station Node B to receive the control information on the HS-SICH channel is as follows:
  • Step S601 The Node B learns the working mode of the HSDPA system in the current time according to the high layer RRC signaling.
  • the Node B learns that the working mode of the system is in the current time according to the RRC signaling of the upper layer.
  • the MIMO mode is also a non-MIMO mode.
  • Step S602 When the TDD HSDPA system works in the non-MIMO mode, the Node B directly detects (decodes) the HS-SICH channel.
  • the Node B decodes the control information of the HS-SICH channel by using the puncturing pattern of the single stream, so as to obtain the signaling information on the HS-SICH channel.
  • Step S603 When the TDD HSDPA system works in the MIMO mode, the Node B detects the HS-SICH according to the single stream and the dual stream.
  • Node B Since the Node B does not know the number of data streams at this time, it needs to be blindly detected (decoded) in the form of single stream and dual stream, respectively.
  • the rate matching mode is also different, Node B
  • the number of data streams recommended by the UE to the Node B and the respective control information of the HS-SICH channel can be obtained by performing blind detection on the HS-SICH channel in both single-stream and dual-stream manners. Therefore, it is not necessary to distinguish the single and dual streams by using the size of the RTBS index number decimal value as described in the first embodiment, which simplifies the design of the RTBS.
  • the blind detection of the HS-SICH in the single-stream and dual-stream manners by the foregoing Node B is specifically as follows: Since the control signaling on the HS-SICH channel does not include information for feeding back the number of MIMO mode data streams, the Node B presses The single-stream and dual-stream modes respectively decode the control signaling on the HS-SICH channel, that is, the parallel decoding of the two modes of HS-SICH control signaling simultaneously, wherein the single-stream mode decoding specifically uses a single-stream puncturing pattern.
  • the dual stream decoding is specifically performed by using a dual stream puncturing pattern for decoding.
  • both decoding methods of HS-SICH use the cyclic redundancy check CRC to check whether the decoding is correct.
  • FIG. 7 is a flowchart of Embodiment 3 of an HS-SICH channel coding method provided by the present invention.
  • the signaling information of the number of data flows back to the Node B by the UE is increased on the HS-SICH channel in the MIMO mode, and is referred to herein as the recommended data stream number signaling RSN.
  • the HSDPA system always performs single-stream transmission, so there is no need to increase the number of RSN signaling indication data streams on the HS-SICH channel.
  • the third embodiment separately encodes other signaling (ACK/NACK, RMF, RTBS, etc.) information on the HS-SICH channel, and then multiplexes the encoded output, and Map to a physical channel.
  • Step S701 separately encode each part of the control information on the HS-SICH channel.
  • RSN information is included on the HS-SICH channel.
  • Step S702 multiplexing the control information outputted by the encoding.
  • Step S703 Interleaving.
  • Step S704 Physical channel mapping.
  • the physical channel mapping maps the interleaved output bitstream to the corresponding assigned code channel.
  • step S702 in the non-MIMO mode, since the RSN signaling is not required to be added on the HS-SICH channel, the RSN signaling is not included in the HS-SICH channel at this time, and accordingly, in the MIMO mode, the implementation The example adds RSN signaling to indicate the number of data streams. At this time, RSN signaling is included on the HS-SICH channel.
  • step S701 in the non- ⁇ mode and the ⁇ mode, the control information of each part of the HS-SICH channel has different coding implementation manners.
  • the coding scheme of the partial control information on the HS-SICH channel is the same as the coding scheme of the HS-SICH channel in the non-MIMO mode described in the first embodiment.
  • the control information of each part of the HS-SICH channel has different coding implementation methods.
  • the UE adopts the corresponding coding mode according to the number of received data streams, and the specific coding implementation manner is as follows:
  • the UE can know the number of data streams by receiving the HS-SCCH channel, and confirm the correctness of the data reception by using the ACK/NACK information after receiving the single stream or the dual stream data.
  • the UE encodes ACK/NACK information in the MIMO mode in three ways:
  • Coding method 1 If the UE receives single-stream data, it uses 1 bit of ACK/NACK signaling.
  • Coding mode 2 If the UE receives the dual stream data, the ACK/NACK signaling of the dual stream is separately encoded. One bit is used for each data stream for correctness confirmation. Each bit of each data stream adopts independent (18, 1) repetition coding, so the ACK/NACK information of each data stream outputs 18 bits, then the dual stream The total length of the ACK/NACK signaling is 36 bits.
  • Coding mode 3 If the UE receives the dual stream data, the ACK/NACK signaling of the dual stream is jointly coded. There are four possible combinations of the two-stream ACK/NACK signaling, namely, ACK-ACK, ACK-NACK, NACK-ACK, and NACK-NACK.
  • the ACK/NACK signaling needs to use a 2-bit length. In this embodiment, (36, 2) is used.
  • the block coding such as RM coding, and maximizing the Hanmming distance between code words, at this time, the length after ACK/NACK coding is 36 bits.
  • RMF information In this case, the bit length of the RMF signaling in the two cases is different, but in this embodiment, In both cases, the coding scheme of the MF information is the same.
  • the specific coding method is as follows.
  • Coding method 1 Single and dual streams are separately indicated, and dual streams are separately coded.
  • the UE uses an encoding method such as block coding or repetition coding to output 16 bits.
  • each data stream performs independent RMF signaling indication, and respectively adopts independent packet coding or repetition coding, and the RMF coding output of each data stream is 8 bits, then the dual stream RMF information coding The total length afterwards is 16 bits.
  • this embodiment can further increase the sequence length of the encoded output to improve the encoding performance.
  • Coding mode 2 Single and dual stream respectively indicate, dual stream joint coding.
  • the UE uses an encoding method such as block coding or repetition coding to output 16 bits.
  • the dual-stream modulation mode is combined with RMF signaling to jointly indicate and perform block coding (such as RM code).
  • block coding such as RM code.
  • the combination of dual-stream modulation modes includes QPSK-QPSK, QPSK-16QAM.
  • 16QAM-QPSK, 16QAM-16QAM, and RMF signaling requires 2 bits, and then 2 bits (16, 2). ) RM code.
  • Coding method 3 The RMF signaling is removed on the HS-SICH channel, and the existing implicit representation method similar to HSUPA is used. Then, the Node B is based on the resource occupancy of the previous time slot code channel and the RTBS fed back by the UE. The information is used to calculate the modulation mode. For details, refer to the process description of Figure 2 above. Since the Node B has learned the modulation mode recommended by the UE through the step flow described in FIG. 2, the decoding step as described in step S103 is not required.
  • the UE determines the decimal value of the RTBS signaling. Since there is RSN signaling, the UE does not need to implicitly recommend to the Node B through the RTBS signaling the number of data streams used in the next transmission.
  • TBS table when setting up single stream, the index number is 0 - 63, and the TBS table index number used by each data stream in dual stream is 0 ⁇ (M-1), where M can be consistent with the existing specification to take 64, or
  • Indexl and Index2 are the TBS index numbers corresponding to each data stream in the dual stream.
  • the RTBS index number decimal values of the two streams are jointly calculated and converted into binary.
  • the coded output is 32 bits.
  • the encoded output of the RTBS information is multiplexed with the encoded output of the RMF information.
  • 1 bit is used to indicate whether the UE recommends a single stream or a dual stream to the Node B;
  • repeat coding is used for 1 bit
  • the coded output sequence is multiplexed with the ACK/NACK information, the RMF information, and the encoded output of the RTBS information.
  • the Node B needs to detect (decode) the HS-SICH channel of the HSDPA system, thereby obtaining ACK/NACK information indicating whether the data block is correctly received and indicating the channel between the Node B and the UE. Quality CQI information.
  • the method for the base station Node B to receive the control information on the HS-SICH channel is described as follows:
  • Step S801 The Node B learns the working mode of the HSDPA system in the current time according to the high layer RRC signaling.
  • the Node B Based on the high-level RRC signaling, the Node B knows whether the working mode of the system is MIMO mode or non-MIMO mode in the current time.
  • Step S802 The Node B performs decoding using an inverse process of HS-SICH encoding.
  • the control information of each part of the HS-SICH channel has different coding implementation manners.
  • the channel information is read from the physical channel carrying the HS-SICH, deinterleaved and demultiplexed, and each signaling information is separated according to the length of each signaling code and the order of discharge.
  • Step S803 The Node B decodes the information of the RSN domain, and learns the number of data streams used by the UE to send data to the Node B for the next transmission.
  • Step S804 The number of data streams obtained by decoding the RSN domain information, and Node B separately
  • the HS-SICH signaling is decoded to obtain RTBS, RMF, and ACK/NACK signaling.
  • the data of the RSN domain is decoded, and the number of data streams used by the UE to be sent to the Node B for next transmission is obtained.
  • the ACK signaling information is learned, so that the last transmission is obtained.
  • the UE if it is ACK, it is ready to send a new data packet. If it is NACK, the last data packet needs to be retransmitted according to the HARQ parameter setting.
  • the TBS size on each data stream recommended by the UE for the next data transmission is obtained; and the RMF signaling information is obtained by decoding the data of the CQI domain.
  • the Node B determines the modulation scheme used on each data stream at the time of the next transmission based on the RMF information obtained by the decoding. If the RMF signaling is implicitly represented, the Node B calculates the modulation mode according to the resource occupancy of the previous time slot code channel and the RTBS fed back by the UE.
  • the Node B in the third embodiment can directly decode the number of data streams recommended by the UE according to the RSN signaling, and does not need to use the design of the signaling such as RTBS as in the first embodiment.
  • the type indicates the number of data streams, that is, distinguishes between single stream and dual stream according to the size of the decimal value of the RTBS index number, thereby simplifying the design of the RTBS signaling.
  • FIG. 9 is a flowchart of Embodiment 4 of an HS-SICH channel coding method provided by the present invention.
  • the MIMO mode HS-SICH channel increases the feedback signaling information RSN of the number of data streams recommended by the UE to the Node B. Except for the RSN signaling, in the same manner as the second embodiment, the fourth embodiment multiplexes other signaling (ACK, RMF, RTBS, etc.) information on the HS-SICH channel together, and then performs joint coding.
  • ACK, RMF, RTBS, etc. other signaling
  • the RSN signaling is not encoded and transmitted together with other signaling information on the HS-SICH channel, but an indication data is added adjacent to the Midamble code of the HS-SICH code channel (ie, the training sequence code).
  • the burst format is shown in Figure 10.
  • the coding steps of the HS-SICH channel signaling in the MIMO mode and the non-MIMO mode are similar, so the specific steps are uniformly described.
  • Step S901 The RSN information on the HS-SICH channel is repeatedly coded.
  • the RSN information outputted by the code can be placed adjacent to the Midamble code located in the code channel of the HS-SICH, as shown in FIG.
  • Step S902 multiplexing ACK/NACK information, RMF information (if not implicitly indicated), and RTBS information on the HS-SICH channel.
  • the HS-SICH channel carries RMF information.
  • Step S903 Add a CRC to the multiplexed HS-SICH channel control information.
  • Step S904 Perform channel coding.
  • encoding by using a convolutional code can overcome the error of control signaling during transmission.
  • Step S905 Perform rate matching.
  • Step S906 Interleaving.
  • Step S907 Physical channel mapping.
  • the Node B needs to detect (decode) the HS-SICH channel of the HSDPA system, thereby obtaining whether the data block is correctly received.
  • ACK/NACK information and CQI information indicating the channel quality between the Node B and the UE.
  • the method for the base station Node B to receive the control information on the HS-SICH channel is as follows:
  • Step S1101 Detect whether the working mode of the HSDPA system is MIMO mode. If yes, go to step S1103. Otherwise, go to step S1102.
  • the Node B Based on the high-level RRC signaling, the Node B knows whether the working mode of the system is MIMO mode or non-MIMO mode in the current time.
  • Step S1102 The Node B directly detects (decodes) the HS-SICH, and learns the control signaling information on the HS-SICH channel.
  • this step uses a single stream puncturing pattern to decode the control information of the HS-SICH channel.
  • Step S1103 The Node B detects the RSN from the data flow indication field adjacent to the Midamble code, and learns the number of data flows recommended by the UE.
  • Step S1104 Detect other control signaling information on the HS-SICH channel according to the number of data streams.
  • Steps S1103 and S1104 are specifically as follows: If the TDD HSDPA system works in the MIMO mode, the Node B first detects the RSN from the data flow indication field adjacent to the Midamble code, and learns whether the number of data flows recommended by the UE is single stream or dual stream. Then, the Node B detects the other signaling information on the HS-SICH channel according to the number of data streams, that is, directly uses the puncturing pattern of the number of streams specified by the RSN to decode other signaling information of the HS-SICH channel, and learns ACK, RMF, RTBS and other information.
  • the HS-SICH for the MIMO mode in the fourth embodiment does not need to perform blind detection, but the number of data streams is first known through RSN signaling, and then the HS-SICH is detected according to the determined number of flows. , thereby improving the efficiency of detection.
  • the method for the Node B to decode the control signaling on the HS-SICH channel to obtain the ACK/NACK information indicating whether the data block is correctly received and the CQI information indicating the channel shield between the Node B and the UE is Node B supports the method of dual stream transmission on the HS-DSCH.
  • the present invention provides a base station supporting dual-stream transmission.
  • the base station includes: a decoding unit 1201 and a data transmission control unit 1202, wherein the decoding unit 1201 is connected to the data transmission control unit 1202 for encoding control information on the HS-SICH supporting single stream and dual stream transmission. Perform corresponding decoding;
  • the data transmission control unit 1202 is connected to the decoding unit 1201 for determining whether to retransmit the data and the transmission format of the next data transmission based on the decoded HS-SICH control information.
  • the decoding unit 1201 includes:
  • the first mode information acquiring subunit 12011 is configured to detect an operation mode of the HSDPA system when the control information of each part of the HS-SICH channel of different working modes is separately encoded, and output the output mode;
  • the RRC signaling indicates whether the operating mode of the HSDPA system is MIMO mode or non-MIMO mode in the current time.
  • the first decoding execution subunit 12012 is configured to obtain an output result of the subunit according to the first mode information, and perform decoding using an inverse process of HS-SICH encoding.
  • the decoding unit 1202 may include: a second mode information obtaining subunit 12013, a second decoding executing subunit 12014, and a third decoding executing subunit 12015, where the second mode information acquiring subunit 12013,
  • the working mode of the HSDPA system is detected and output; similarly, the working of the HSDPA system in the current time can be learned according to the RRC signaling of the upper layer. Whether the mode is MIMO mode or non-MIMO mode.
  • a second decoding execution subunit 12014 configured to: when the output result of the second mode information acquiring subunit indicates that the HSDPA system works in the MIMO mode, detect the HS-SICH according to the single stream and the dual stream;
  • the third decoding execution sub-unit 12015 is configured to decode the control information on the HS-SICH channel by using a single-stream puncturing pattern when the output result of the second mode information acquiring sub-unit indicates that the HSDPA system operates in the non-MIMO mode.
  • the decoding unit 1201 may include: a third mode information obtaining subunit 12016, a fourth decoding executing subunit 12017, and a fifth decoding executing subunit 12018, where
  • the third mode information acquiring sub-unit 12016 is configured to: when the HS-SICH is provided with the data flow number indication information, and each part of the control information is multiplexed and coded, detecting an operation mode of the HSDPA system and outputting;
  • the present invention can learn, according to the high layer RRC signaling, whether the working mode of the HSDPA system is the MIMO mode or the non-MIMO mode in the current time.
  • a fourth decoding execution subunit 12017 configured to: when the output result of the third mode information acquiring subunit indicates that the HSDPA system works in the MIMO mode, first obtain the number of data streams, and then use the punctured pattern corresponding to the number of data streams.
  • the encoded control information on the HS-SICH is decoded.
  • the fifth decoding execution sub-unit 12018 is configured to use the suffocation of the single stream when the output result of the third mode information acquiring subunit indicates that the HSDPA system operates in the non-MIMO mode.
  • the pattern decodes the control information on the HS-SICH channel.
  • the number of data stream indication information on the HS-SICH that is decoded by the decoding unit 1201 may be placed in an adjacent position of the training sequence code of the HS-SICH code channel.

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Abstract

La présente invention concerne un procédé de prise en charge d'une transmission bidirectionnelle dans un canal HS-SICH comprenant les étapes suivantes : A) les informations de contrôle du canal HS-SICH prenant en charge la transmission unidirectionnelle et bidirectionnelle sont définies respectivement ; B) l'UE code les informations de contrôle du canal HS-SICH et transmet les informations codées au nœud B ; C) le nœud B réalise le décodage correspondant des informations de contrôle codées dans le canal HS-SICH ; D) le nœud B détermine si les données sont retransmises et le mode de transmission de l'envoi des données suivantes d'après les informations de contrôle HS-SICH décodées. La présente invention concerne en outre un procédé de réalisation de la transmission bidirectionnelle pour une station de base et une station de base.
PCT/CN2008/073311 2007-12-03 2008-12-03 Procédé et dispositif de prise en charge de transmission bidirectionnelle WO2009074096A1 (fr)

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CN102386994B (zh) * 2010-08-30 2014-08-06 电信科学技术研究院 Hs-sich信息的传输方法和设备
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