WO2014090045A1 - Procédé de traitement de canal de transmission en liaison montante td-scdma - Google Patents

Procédé de traitement de canal de transmission en liaison montante td-scdma Download PDF

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Publication number
WO2014090045A1
WO2014090045A1 PCT/CN2013/085827 CN2013085827W WO2014090045A1 WO 2014090045 A1 WO2014090045 A1 WO 2014090045A1 CN 2013085827 W CN2013085827 W CN 2013085827W WO 2014090045 A1 WO2014090045 A1 WO 2014090045A1
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WO
WIPO (PCT)
Prior art keywords
data
transmission channel
processing method
uplink transmission
coding
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Application number
PCT/CN2013/085827
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English (en)
Chinese (zh)
Inventor
徐琪
Original Assignee
中兴通讯股份有限公司
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Publication of WO2014090045A1 publication Critical patent/WO2014090045A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • 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
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0041—Arrangements at the transmitter end

Definitions

  • the present invention relates to the field of wireless mobile communication and signal processing systems, and in particular to a TD-SCDMA (Time Division Duplex-Synchronous Code Division Multiple Access) uplink transmission channel processing.
  • the method is applied to the processing of an uplink transmission channel of a TD-SCDMA baseband chip processing system.
  • an uplink is a signal transmission link from a terminal UE to a base station NodeB, and for the uplink, its main processing includes processing of a transmission channel portion and processing of a physical channel portion.
  • the transmission channel processing mainly includes Cyclic Redundancy Code (CRC) addition, channel coding, first interleaving, rate matching, and transmission channel multiplexing.
  • CRC Cyclic Redundancy Code
  • the physical channel performs second interleaving, physical channel mapping, QPSK debugging, Data spreading, Data scrambling, I&Q separation operation on the data sent by the transmission channel, and the processed data and the midamble Midamble, uplink pilot physics
  • the channel UpPTS uplink synchronization code SYNCJJL constructs an uplink burst in chronological order.
  • the data of each transport channel is transmitted in units of transport blocks and transmitted according to a Transmit Time Interval (abbreviated as ⁇ ).
  • ⁇ Transmit Time Interval
  • different lengths can be used. According to 3GPP, they can be one of 10ms, 20ms, 40ms and 80ms respectively.
  • CRC addition and channel coding are performed at the transmitting end in units of data blocks.
  • the channel coding may be convolutional coding or turboscopic Turbo coding.
  • the encoded data stream is subjected to radio frame length equalization, for example, the dummy bits are padded at the end of the last frame so that the number of data bits of each frame in one frame is equal.
  • the data stream that has been subjected to radio frame length equalization is interleaved for the first time, that is, inter-frame interleaving.
  • the main purpose of interleaving is to turn the burst error into a random error to facilitate the decoder to correct the error, thereby improving the ability to resist fading.
  • a ⁇ is greater than 10 ms, the data bit sequence needs to be segmented to be mapped to multiple radio frames for transmission.
  • the uplink rate matching method adopted by the method is: first, performing transmission channel coding; then dividing the data into multiple sequences to generate an interleaved image; and determining a position in the data that needs to be punched and repeated according to the calculated data bit shift value, Therefore, the data required for subsequent processing is selected and stored in the memory for subsequent processing.
  • the logic complexity of this method is relatively large.
  • Chinese Patent CN200610138212 (The invention patent name is a method for uplink transmission channel multiplexing)
  • the published patent document provides a method for uplink transmission channel multiplexing, which mainly includes the following implementation steps: First, current All transport blocks of multiple transport channels that need to be transmitted simultaneously in a 10 ms time interval are sequentially completed in order of TTI, including cyclic redundancy check code addition, concatenation of transport blocks, and coding block segmentation, coding processing, The channel-encoded data word stream is sequentially written into the first interleaved random access memory.
  • the data of each transport channel is taken out from the first interleaved random memory in the order of the original serial number of the transport channel, and the interleaving and rate matching are performed, and the multiplexing of the transport channel is implemented, and the processed data is written to the first Secondary interleaved random access memory.
  • the technical solution stores all the data of the transmission channel into a large memory, and after all the transmission channels complete the storage, the 10 ms data after the completion of the interleaving is selected and processed for subsequent processing, so that the implementation of the one-time interleaving is compared.
  • a TD-SCDMA uplink transmission channel processing method includes:
  • Cyclic redundancy check code CRC addition and cascading of transport blocks are sequentially performed in the order of trcW trchl ... trch(Nl) for all transmission time intervals TTI in the current N transmission channels to be processed. And the segmentation processing of the coding block, if there is no transmission block to be processed at this time, and the first interleaved memory RAM (on-chip random access memory) has data to be processed, directly execute step E;
  • step B Transmitting the processed coding block, suspending the operation of the step B after each time the data stream of one coding block is transmitted, performing step ⁇ and waiting for the appearance of the coding completion flag signal of the channel coding of the coding block fed back in step C After the above code completion flag appears, the data stream of the next code block is transmitted, and so on, until all the code blocks are transmitted;
  • step C channel coding the data stream of the coding block formed in step B, after completion, generating a data word stream and generating an encoding completion flag, and feeding back the coding completion flag step B;
  • D. Determine whether the channel-coded data stream needs to be selected according to the TTI size. If ⁇ is 5ms or 10ms, the data stream is directly stored in the first interleaving RAM. Otherwise, according to the channel coding type of the data stream. The data is selected by a 24-bit mobile register, and then the data stream is stored in the first interleaved RAM;
  • the data is sequentially read out in the order in which the data is stored in the first interleave RAM, and rate matching and multiplexing of the transport channels are performed, and then the processed data is written into the second interleave RAM.
  • the N Preferably, in the step A, the N ⁇ 8.
  • the ⁇ is one of 5 ms, 10 ms, 20 ms, 40 ms or 80 ms.
  • the channel coding comprises convolutional coding and turboscopic turbo coding.
  • the data writing sequence of storing the data stream into the first interleaving RAM is consistent with the serial processing sequence of the transmission channel in step A until the data of the last transmission channel is written. flow.
  • the first interleaved RAM has a storage space of 10 ms.
  • the 24 bit mobile register adopts a ping-pong buffer structure.
  • the data is selected by the 24-bit mobile register according to the channel coding type of the data stream: using two 24-bit shift registers, the coded data is cross-written into the two shift registers.
  • the uplink transmission channel processing method provided by the embodiment of the present invention sequentially performs processing for each 10 ms of each transmission channel, and does not need to sort the TTIs of the eight transmission channels according to the size. Reduce the complexity of processing logic.
  • the uplink transmission channel processing method provided by the embodiment of the present invention utilizes the characteristics of one-time interleaving processing: it is performed in units of 10 ms, so that it is not necessary to store all the transmission channel data in one large memory to select 10ms for processing, but directly store only one 10ms of data to be processed, and use memory to complete the selection of data, which is not only intuitive and convenient to implement, but also reduces the logical processing difficulty of data storage location judgment, and reduces
  • the requirement of interleaving the memory storage space is optimized, so that the optimized area is achieved for the entire uplink area.
  • 1 is a schematic diagram of an operation sequence of an uplink transmission channel in an embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of an implementation of an uplink hardware module in an embodiment of the present invention
  • FIG. 3 is a schematic diagram of selecting the number of bits to be processed when the size of the UI is 40 ms in the embodiment of the present invention.
  • the embodiment of the present invention does not need to sort the 8 transmission channels according to the size, but sequentially completes each 10 ms processing of each transmission channel.
  • the embodiment of the present invention utilizes the characteristics of one-time interleaving processing: That is, it is performed in units of 10ms each, so it is not necessary to store all the data of the transmission channel in one large memory and select 10ms for processing, and directly store only one 10ms of data to be processed currently, which will be the first time.
  • the capacity of the interleaved memory is reduced from the original data of the eight transport channels to the capacity of storing only one 10ms of data in one transport channel.
  • the first deposit is required.
  • an embodiment of the present invention sequentially performs CRC attaching and encoding operations on data to be processed on a transport channel, and determines which data needs to be performed in the next step after performing an interleaving according to the size of the ⁇ and the interleaving rule, and then takes a 10 ms operation.
  • the data is pre-selected and stored in a small RAM that can be stored in 10ms of data, and then subjected to subsequent rate matching operations.
  • the selection of each 10ms data is similar until the processing of all the data of the transmission channel is completed.
  • the implementation steps of the uplink transmission channel processing method provided by the embodiment of the present invention specifically include the following steps: Step 1. All TTIs in the eight transmission channels to be processed are according to trch0, t rc hl .. . The order of trch7, in turn CRC addition, cascading of transport blocks and segmentation of coded blocks. If no transport block needs to be processed at this time, and there is data to be processed in the first interleaved RAM, step 5 is directly executed.
  • Step 2 transmitting the processed coding block, suspending the step 2 after each transmission of the data stream of the coding block, performing step 3, waiting for the occurrence of the coding completion flag signal of the channel coding of the coding block fed back in step 3, After the above-mentioned coding completion flag appears, the data stream of the next coding block is transmitted, and so on, until all the coding blocks have been transmitted.
  • Step 3 Perform channel coding on the data stream of the coding block formed in step 2. After completion, generate a data word stream and generate a code completion flag, and feedback the above code completion flag to step 2.
  • Step 4 According to whether the TTI size needs to be selected through the 24-bit mobile register, if it is 5ms or 10ms, it is directly stored in the first interleaving RAM, wherein, in this embodiment, the first interleaved RAM has 10ms storage. space. If the above two cases are not used, that is, the TTI is not 5ms or 10ms, the data needs to be selected according to the channel coding type and stored in the first interleaved RAM. The order in which data is written to the first interleaved RAM is the same as the serial processing sequence of the transport channel in step 1, until the data word stream of the last transport channel is written.
  • Step 5 sequentially read out the data stored in the first interleave RAM, perform rate matching, implement multiplexing of the transmission channel, and write the processed data to the second interleave RAM.
  • the uplink transmission channel processing method in the embodiment of the present invention can still process data streams of up to eight transmission channels in the same manner as the TD-SCDMA uplink transmission channel processing method in the prior art, but unlike the prior art, in the present invention
  • it is first determined which are the 10ms data of the interleaved output, and the timing diagram thereof is shown in FIG. 1.
  • the implementation architecture of the entire hardware module is shown in FIG. 2, wherein the data selection process needs to be based on the size of the ⁇ and the channel coding manner. determine.
  • the optimization scheme uses the feature to directly select a number of bits belonging to the same frame from the encoded data.
  • Table 1 Inter-column permutation mode of the first interleaving
  • each coding enables 2/3 output bits corresponding to each other, and then combines them into one word data and stores them in the first interleaving RAM. After all coding blocks are encoded, Data is read from the RAM for rate matching scrambling processing.
  • TTI 20/40/80ms
  • the reason why the size of 24bit is selected is based on: Whether it is 1/2 or 1/3 encoding, the number of encodings can always be guaranteed, and the data can just fill the register; whether it is 20, 40, 80ms, 24 bits There must be an integer number of bits belonging to the same wireless.
  • the specific implementation can be implemented by a counter.
  • the time characteristics of the write or read-out 24Bit shift register include: number of write cycles, determined by the encoding type, enable type output; The number of cycles, determined by the size of ⁇ , the read/write time characteristics are shown in Table 2, expressed in the format of the number of write cycles/read cycles, as follows: Table 2 shift register read and write time characteristics
  • TD-SCDMA uplink transmission channel processing method provided by an embodiment of the present invention has the following beneficial effects: It is not only intuitive and convenient to implement, but also reduces the logical processing difficulty of data storage location judgment, and reduces The requirement of interleaving the memory storage space is optimized, so that the optimized area is achieved for the entire uplink area.

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

Abstract

L'invention porte sur un procédé de traitement de canal de transmission en liaison montante TD-SCDMA. Un procédé de traitement de canal de transmission en liaison montante décrit par la présente invention réalise séquentiellement un traitement de chaque période de 10 ms pour chaque canal de transmission et ne nécessite pas de traitement de mise en ordre en fonction de la taille pour des TTI de 8 canaux de transmission, ce qui permet de réduire la complexité de la logique de traitement. Par adoption de la présente invention, il n'est pas nécessaire de sauvegarder des données de tous les canaux de transmission dans une grande mémoire afin de choisir 10 ms pour un traitement, et à la place, seules des données de 10 ms qui doivent être actuellement traitées sont directement stockées, et la mémoire est utilisée pour choisir les données, si bien que la mise en œuvre est non seulement visuelle et commode, mais en outre réduit la difficulté de traitement logique de détermination d'une position de stockage de données, et réduit l'exigence d'espace de stockage d'une mémoire entrelacée primaire, ce qui permet d'obtenir un effet d'optimisation pour une zone de liaison montante entière.
PCT/CN2013/085827 2012-12-11 2013-10-23 Procédé de traitement de canal de transmission en liaison montante td-scdma WO2014090045A1 (fr)

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CN201210532075.5A CN103873186B (zh) 2012-12-11 2012-12-11 Td-scdma上行传输信道处理方法
CN201210532075.5 2012-12-11

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US11019620B2 (en) 2014-05-19 2021-05-25 Qualcomm Incorporated Apparatus and method for inter-band pairing of carriers for time division duplex transmit- and receive-switching and its application to multiplexing of different transmission time intervals
US11357022B2 (en) * 2014-05-19 2022-06-07 Qualcomm Incorporated Apparatus and method for interference mitigation utilizing thin control
US10164659B2 (en) 2016-05-12 2018-12-25 Mediatek Inc. QC-LDPC coding methods and apparatus
US10581457B2 (en) 2017-01-09 2020-03-03 Mediatek Inc. Shift coefficient and lifting factor design for NR LDPC code
US10630319B2 (en) 2017-01-24 2020-04-21 Mediatek Inc. Structure of interleaver with LDPC code
US10432227B2 (en) 2017-01-24 2019-10-01 Mediatek Inc. Location of interleaver with LDPC code
US10484013B2 (en) 2017-05-12 2019-11-19 Mediatek Inc. Shift-coefficient table design of QC-LDPC code for smaller code block sizes in mobile communications
US10567116B2 (en) 2017-05-12 2020-02-18 Mediatek Inc. Wireless communication using codebooks from a QC-LDPC code for shorter processing latency and improved decoder throughput efficiency
US10484011B2 (en) 2017-05-12 2019-11-19 Mediatek Inc. Shift-coefficient table design of QC-LDPC code for larger code block sizes in mobile communications
CN109150413B (zh) * 2017-06-16 2021-06-15 华为技术有限公司 发送和接收反馈信息的方法和装置

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CN103873186B (zh) 2018-07-13

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