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WO2005109817A1 - Procede de transmission d'un rapport de statut - Google Patents

Procede de transmission d'un rapport de statut Download PDF

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Publication number
WO2005109817A1
WO2005109817A1 PCT/CN2005/000603 CN2005000603W WO2005109817A1 WO 2005109817 A1 WO2005109817 A1 WO 2005109817A1 CN 2005000603 W CN2005000603 W CN 2005000603W WO 2005109817 A1 WO2005109817 A1 WO 2005109817A1
Authority
WO
WIPO (PCT)
Prior art keywords
pdu
status report
amd pdu
current
rlc sdu
Prior art date
Application number
PCT/CN2005/000603
Other languages
English (en)
Chinese (zh)
Inventor
Xuezhi Yang
Original Assignee
Huawei Technologies Co.,Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co.,Ltd. filed Critical Huawei Technologies Co.,Ltd.
Publication of WO2005109817A1 publication Critical patent/WO2005109817A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/22—Parsing or analysis of headers

Definitions

  • the present invention relates to information transmission technology, and particularly to a method for transmitting a status report in a confirmation mode in a mobile communication system.
  • the wireless transmission technology of the Universal Mobile Telecommunications System includes frequency division duplex mode (FDD) and time division duplex mode (TDD).
  • FDD frequency division duplex mode
  • TDD time division duplex mode
  • WCDMA uses the FDD mode
  • TD-CDMA and TD-SCDMA use the TDD mode.
  • TD-CDMA and TD-SCDMA are also called 3.84McpsTDD and 1.28McpsTDD, respectively.
  • the UMTS system includes radio access network (RAN) and core network (CN) parts.
  • the RAN is used to process all radio-related functions.
  • the CN is responsible for processing all voice calls and data connections in the UMTS system, and implements external network. Switching and routing functions.
  • the wireless interface protocol is divided into a physical layer, a data link layer, and a network layer.
  • the radio link control (RLC) in the data link layer supports three modes: transparent mode (TM), unacknowledged mode (UM) and acknowledged mode (AM). It implements segmentation, concatenation, padding, error control, and flow control. , Repeatability and other functions.
  • the AM mode has an automatic request retransmission (ARQ) mechanism, and the RLC AM mode can use a sliding window protocol.
  • FIG 1 shows the model of the RLC AM entity.
  • Each RLC AM entity includes a sending side and a receiving side.
  • the sending side is used to schedule and send data units, and sends the data units to the peer RLC AM entity.
  • the receiving side is responsible for receiving data.
  • the unit sends to the upper layer, and generates a status report, transmits the reception status of the data unit to the sending side, and sends it to the peer RLC AM entity.
  • the status report is also used for functions such as window control.
  • the specific implementation process is shown in Figure 1, including:
  • the receiving side of the RLC AM entity puts the received AMD PDU into the receiving buffer; then decrypts it and parses the decrypted data; and then determines whether the parsed PDU can reassemble the RLC SDU, and if it can reassemble the complete
  • the RLC SDU performs a recombination operation, and submits the recombined RLC SDU to the upper layer.
  • the RLC control unit, the receiving buffer and the retransmission management module on the receiving side will determine whether the current AMD PDU transmission is accurate and whether it is necessary to return a corresponding status report.
  • the sending side of the AM entity performs the step of setting fields in the RLC header to place the status report in the Piggybacked STATUS PDU, which is piggybacked by the AMD 'PDU to the peer AM entity; if the status report cannot currently be piggybacked through the AMD PDU, it sends
  • the side separately constructs a status protocol data unit (STATUS PDU), and sends a status report to the peer AM entity through the STATUS PDU.
  • STATUS PDU status protocol data unit
  • PDU The rest of the PDU contains a piggybacked status protocol data unit (Piggybacked STATUS PDU);
  • UMD PDU Reserved (In the current version, PDUs with this value are discarded)
  • an AM entity may use a status protocol data unit (STATUS PDU) or a piggybacked status protocol data unit (Piggybacked STATUS PDU) to send a status report to the peer AM entity.
  • STATUS PDU status protocol data unit
  • Piggybacked STATUS PDU piggybacked status protocol data unit
  • Piggybacked STATUS PDU When using Piggybacked STATUS PDU, it is possible to avoid constructing a PDU unit transmission status report separately, thereby avoiding many padding bits to save bandwidth.
  • LI. Is used to indicate the end of an RLC SDU only after the current SDU ends in an AMD PDU, the Piggybacked STATUS PDU can be cascaded at the tail of the ADM PDU for transmission, that is, in RLC During SDU transmission, if an RLC SDU occupies multiple AMD PDUs, LI can only appear in the last AMD PDU.
  • Piggybacked STATUS PDU can only be placed in the tail of the last AMD PDU to transmit status reports; If the status report is transmitted before the current RLC SDU transmission is not completed, then only The transmission of status reports can be achieved by constructing STATUS PDUs. Summary of the invention
  • the main purpose of the present invention is to provide a status report transmission method, so that when a RLC SDU transmission is not completed, a piggybacked STATUS PDU can be used to transmit the status report, thereby avoiding the construction of a separate STATUS PDU and the introduction of Multiple padding bits save bandwidth.
  • the technical solution provided by the present invention includes a status report sending process: the current AM entity determines whether a status report needs to be sent, if not, then exits the current process, and if necessary, further determines whether the RLC SDU to be encapsulated and transmitted by the current AMD PDU is described as described above.
  • the tail data of the RLC SDU if yes, exit the current process; otherwise, insert a status report into the AMD PDU, and insert a special LI value indicating that the RLC SDU data transmission has not ended, indicating the length of the RLC SDU data contained in the current AMD PDU LI, which means that the current AMD PDU contains the LI specific value of the status report, and then sends the AMD PDU out;
  • the technical solution provided by the present invention further includes a receiving process of the status report: when the AM entity receives the AMD PDU, it determines whether it contains the special LI value, if not, it exits the current process, and if there is, it takes it out of the current AMD PDU. RLC SDU data and status reports; and continue receiving the subsequent parts of the RLC SDU.
  • the LI indicating the RLC SDU data length in the current AMD PDU is located behind the LI special value, and the LI specific value is located after the RLC SDU data length LI in the current AMD PDU.
  • the status agreement of the piggybacking The proposed data unit is located after the RLC SDU data in the current AMD PDU.
  • the special value of LI is a reserved field of LI in the AM mode of the UMTS RLC protocol.
  • the LI is 7 bits, otherwise it is 15 bits.
  • the status report transmission method provided by the present invention can transmit a status report data unit by inserting a piggybacked status protocol data unit after an AMD PDU without transmitting the RLC SDU. And it does not affect the current RLC SDU transmission process, thereby avoiding the separate construction of STATUS PDUs, thereby further avoiding the introduction of many padding bits, saving bandwidth, and improving link transmission efficiency.
  • FIG. 2 is a schematic diagram of the AMD PDU format in UMTS.
  • FIG. 3 is a flowchart of sending a status report according to the present invention.
  • FIG. 4 is a flowchart of receiving a status report according to the present invention. Mode of Carrying Out the Invention
  • the present invention inserts a Piggybacked STATUS PDU transmission status report without affecting the transmission of the RLC SDU to avoid constructing a STATUS PDU separately.
  • the implementation method of the present invention is described in detail below.
  • the present invention uses at least 3 LIs in the LI field of the AMD PDU format.
  • a special value of LI is used to indicate that the RLC SDU data transmission in the current AMD PDU is not ended, and this special value is set by the present invention
  • a LI is used to indicate that the RLC SDU data contained in the current AMD PDU is in the current AMD PDU. Length; and use a LI feature
  • the fixed value indicates that the current AMD PDU contains a Piggybacked STATUS PDU, and the Piggybacked STATUS PDU contains a status ⁇ : report.
  • the receiver When in use, place the set LI special value at the first LI position of the three LIs in the AMD PDU, use the second LI to indicate the data length of the RLC SDU carried by the PDU, and then use the third LI LI means that Piggybacked STATUS PDU is connected at the tail of the PDU.
  • the receiver after receiving the AMD PDU, the receiver, after detecting the first LI special value, knows that the RLC SDU behind the position specified by the second LI in the PDU has not been transmitted and will continue to receive the LC in subsequent AMD PDU SDU data to complete the reception of the RLC SDU; on the other hand, the Piggybacked STATUS PDU is read from the AMD PDU according to the third LI special value to implement the transmission of the status report.
  • the LI special value set above is placed in the first position of the three LIs, but it is not difficult to understand that in this AMD PDU, the set LI special value may also be placed in the second or third position.
  • setting 1111100 and 111111111111100 respectively indicates that the RLC SDU indicated by the next LI has not ended in the current AMD PDU.
  • the following uses 7-bit LI as an example, and refers to the status report sending process shown in FIG. 2 and FIG. 3 and the status report receiving process shown in FIG. 4. If the current RLC SDU transmission is not completed, the transmission status report is reported. The method is described in detail, including:
  • the current AM entity first determines whether a status report needs to be sent, and if not, exits the current process; otherwise, further determines whether the current RLC SDU to be encapsulated and transmitted by the AMD PDU is the RLC SDU Trailing data, that is, determining whether the RLC SDU transmission is complete, if it is, exit the current process, as shown in Table 3.
  • the outgoing method piggybacks the status report when transmitting the RLC SDU. Otherwise, the method described below is used to construct an AMD PDU carrying the RLC SDU and status report; and then sends the RLC SDU piggybacking the status report.
  • the Piggybacked STATUS PDU is used to carry the status report, and the Piggybacked STATUS PDU is concatenated at the tail of the current AMD PDU, and is set according to the AMD PDU structure shown in Table 4.
  • the first LI the first LI
  • the next next LI 1111110, see the description in Table 1, indicating the current AMD PDU
  • the remaining part contains a cascaded state protocol data unit; the next data is the AMD
  • the AMD PDU structure transmission status report shown in Table 4 is used. If the status report is not required to be transmitted, the subsequent RLC SDU data is transmitted using the AMD PDU structure provided by the existing technology, as shown in the following table.
  • Table 5 is a subsequent PDU containing SDU data
  • Table 6 is a SDU tail data. PDU.
  • the RLC SDU data in the AMD PDUs shown in Table 5, Table 6 and Table 4 belong to one RLC SDIL
  • the data contained in the AMD PDU shown in Table 5 is part of the data of the RLC SDU that has not been transmitted. There is no LI byte in this AMD PDU, which means that the data of the subsequent part of the RLC SDU will continue to be transmitted in the subsequent AMD PDU.
  • the RLC SDU ends in the PDU, that is, the data in the AMD PDU is the tail data of the RLC SDU.
  • the opposite AM entity continues to receive the AMD PDUs shown in Tables 5 and 6 according to the existing method, reassembles the RLC SDUs in these AMD PDUs, and transmits them to the upper layer to complete the RLC SDU transmission.
  • the Piggybacked STATUS PDU transmission status report is inserted during the RLC SDU transmission process, thereby avoiding the construction of a status protocol data unit separately for the transmission of the status report, thereby avoiding the introduction of padding bits, saving This increases bandwidth and improves link transmission efficiency.

Landscapes

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

Abstract

Un procédé de transmission du rapport de statut est appliqué à un système de communication comprenant une entité AM de modèle de connaissance. Le procédé d'envoi du rapport de statut consiste à: déterminer quand l'entité AM de courant doit envoyer le rapport de statut, déterminer que RLC SDU ne sera pas encapsulé et envoyé par AMD PDU de courant ne correspond pas aux données de queue de RLC SDU, insérer le rapport de statut dans AMD PDU, et insérer la valeur spécifique LI indiquant que la transmission de données RLC SUC n'est pas finie, LI indiquant la longueur de RLC SDU comprise dans AMD PDU de courant et la valeur particulière LI indiquant que le courant AMD PDU est inclus dans le rapport de statut, puis à envoyer AMD PDU. Le procédé de réception du rapport de statut consiste à: déterminer, lorsqu'entité AM a reçu AMD PDU, quel AMD PDU comprend la valeur spécifique LI, obtenir les données RLC SDU et le rapport de statut provenant de AMD PDU; et continuer à recevoir la partie suivante de RLC SDU. Dans le cas où la transmission RLC SDU n'est pas finie, le rapport de statut est transmis par concaténation.
PCT/CN2005/000603 2004-05-12 2005-04-29 Procede de transmission d'un rapport de statut WO2005109817A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN 200410034760 CN100512506C (zh) 2004-05-12 2004-05-12 一种状态报告的传输方法
CN200410034760.0 2004-05-12

Publications (1)

Publication Number Publication Date
WO2005109817A1 true WO2005109817A1 (fr) 2005-11-17

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CN (1) CN100512506C (fr)
WO (1) WO2005109817A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1330155C (zh) * 2005-08-24 2007-08-01 华为技术有限公司 无线链路控制乱序传输功能中协议数据单元数据处理方法
CN100531023C (zh) * 2007-02-15 2009-08-19 大唐移动通信设备有限公司 反馈状态报告的方法及设备
CN101369879B (zh) * 2007-08-14 2012-12-26 华为技术有限公司 一种请求数据重传的方法及装置
CN103078722B (zh) * 2007-08-14 2017-11-28 华为技术有限公司 一种请求数据重传的方法及装置
CN101369928A (zh) * 2008-09-05 2009-02-18 上海华为技术有限公司 测量报告的上报方法、读取方法、装置和系统
CN102957522B (zh) * 2011-08-24 2017-05-10 中兴通讯股份有限公司 一种rlc am状态报告处理的方法和系统

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1358375A (zh) * 1999-04-09 2002-07-10 艾利森电话股份有限公司 柔性无线电链路控制协议
WO2004015906A2 (fr) * 2002-08-09 2004-02-19 Interdigital Technology Corporation Attribution de memoire efficace dans une unite d'emission/reception sans fil

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1358375A (zh) * 1999-04-09 2002-07-10 艾利森电话股份有限公司 柔性无线电链路控制协议
WO2004015906A2 (fr) * 2002-08-09 2004-02-19 Interdigital Technology Corporation Attribution de memoire efficace dans une unite d'emission/reception sans fil

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CN100512506C (zh) 2009-07-08
CN1697556A (zh) 2005-11-16

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