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WO2011147177A1 - Procédé et système de transmission de données - Google Patents

Procédé et système de transmission de données Download PDF

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Publication number
WO2011147177A1
WO2011147177A1 PCT/CN2010/080024 CN2010080024W WO2011147177A1 WO 2011147177 A1 WO2011147177 A1 WO 2011147177A1 CN 2010080024 W CN2010080024 W CN 2010080024W WO 2011147177 A1 WO2011147177 A1 WO 2011147177A1
Authority
WO
WIPO (PCT)
Prior art keywords
window
mrw
temporary
receiving
pdu
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2010/080024
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English (en)
Chinese (zh)
Inventor
张苑
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZTE Corp
Original Assignee
ZTE Corp
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 ZTE Corp filed Critical ZTE Corp
Publication of WO2011147177A1 publication Critical patent/WO2011147177A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/1874—Buffer management
    • H04L1/1877—Buffer management for semi-reliable protocols, e.g. for less sensitive applications like streaming video

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a data transmission method and system.
  • the Uu interface protocol stack is divided into a physical layer, a data link layer and a network layer.
  • the Radio Link Control (RLC) sublayer of the data link layer provides transparent mode (Transparent Mode, ⁇ ), Unacknowledged Mode (UM), and Acknowledged Mode (AM) for the upper layer.
  • RLC Radio Link Control
  • UM Unacknowledged Mode
  • AM Acknowledged Mode
  • SDU Service Data Unit
  • the RLC entity of the transmitting end segments serializes the SDU to form one or more acknowledged mode data protocol data units (Acknowledged Mode Protocol).
  • the Data Unit is transmitted.
  • Each AMD PDU includes a 12-bit Sequence Number (SN) field, and the RLC entity sends the AMD PDU in the order of increasing SN. If the status report of the RLC entity at the receiving end is triggered, a status report including the receiving status is sent to the transmitting end, and the receiving end resends the AMD PDU indicated to be unsuccessfully received according to the status report.
  • the sending RLC entity will select to enter the Move Receiving Window (MRW) process or the RESET process according to the discarding manner of the upper layer configuration SDU.
  • MMW Move Receiving Window
  • the SDU discarding mode of the upper layer configurable sender RLC entity includes: explicit signaling discarding based on the discarding timer, explicit signaling discarding based on the maximum number of retransmissions, and non-discarding based on the maximum number of retransmissions, The first two configurations will trigger the MRW (process. If the upper layer is configured to discard the explicit signaling SDU based on the maximum number of transmissions (the discarding of explicit signaling includes SDU dropping based on the maximum number of retransmissions and timer-based discarding) The SDU is discarded, which triggers the MRW process), when the AMD PDU is transmitted.
  • MRW SUFI Move Receiving Window Super Field
  • the receiving end RLC entity moves the receiving window according to the MRW SUFI indication SN value, and responds by replying with the Move Receiving Window Acknowledgement Super Field (MRW ACK SUFI).
  • the state packet informs the sender that the mobile reception window is successful.
  • the sender RLC entity updates the transmission window according to the reception window movement condition.
  • the technical problem to be solved by the present invention is to provide a data transmission method and system.
  • SDU discard mode when a discarding SDU exists in a transmission window, it can be utilized to a greater extent without affecting the MRW process. Bandwidth, increase the data transmission rate.
  • the present invention provides a data transmission method applied to an acknowledgement mode (AM) data transmission service, the method comprising: a sender radio link control (RLC) entity according to a service data unit (SDU) After the discarding mode initiates the mobile receiving window (MRW) process, a status packet with a mobile receiving window super domain (MRW SUFI) is transmitted, and a temporary transmitting window is constructed; and the transmitting RLC entity receives the receiving end RLC entity Sended mobile receiving window confirmation Prior to (MRW ACK), an acknowledge mode data protocol data unit (AMD PDU) present in the temporary transmission window is transmitted.
  • the method further includes: the transmitting end RLC entity uses a temporary window flag to indicate whether a temporary transmission window ⁇ is used.
  • VT VT
  • MRWMS VT + Tx - Window - Size
  • VT (MRWA) temporary At the bottom of the window of the send window
  • VT (MRWMS) is the top of the temporary send window
  • Tx—Window—Size is the configured send window size.
  • the step of constructing the temporary sending window by the sending end RLC entity includes: after initiating the MRW process, saving the acknowledgment mode data protocol data unit (AMD PDU) sequence number (SN) value at the end of the last discarded SDU data, and using the SN The AMD PDU corresponding to the value is used as the transmission window to construct a temporary transmission window.
  • the transmitting end RLC entity passes through
  • the PDU is sent in the manner of the status packet with the MRW SUFI; the method further includes: after receiving the PDU with the MRW SUFI, the receiving RLC entity first parses the Status PDU or the Piggybacked Status PDU, and moves Receive window; then parse the AMD PDU received within the same transmission time interval (TTI).
  • TTI transmission time interval
  • the method further includes: the receiving end RLC entity parsing the Status PDU or the Piggybacked Status PDU, and after transmitting the receiving window, sending a status packet with a mobile receiving window acknowledgement super domain (MRW ACK SUFI), notifying the sending The RLC entity of the RLC entity succeeds; after receiving the status packet with MRW ACK SUFI, the transmitting RLC entity moves the sending window and initializes the temporary sending window to end the current MRW process.
  • MRW ACK SUFI mobile receiving window acknowledgement super domain
  • the present invention also provides a data transmission system, which is applied to confirm The data transmission of the mode
  • the device includes: a transmitting end radio link control (RLC) entity, where the sending end RLC entity comprises: a mobile receiving window (MRW) process initiating unit, a temporary sending window constructing unit and a data transmitting unit, wherein
  • the MRW process initiating unit is configured to: after initiating the MRW process according to the discarding manner of the service data unit (SDU), send a status packet with a mobile receiving window super domain (MRW SUFI), and notify the temporary sending window structure
  • the temporary transmission window construction unit is configured to: when receiving the notification from the MRW process initiation unit, construct a temporary transmission window; the data transmission unit is configured to: acknowledge the mobile reception window sent by the RLC entity at the receiving end (MRW) Before ACK), an acknowledge mode data protocol data unit (AMD PDU) present in the temporary transmission window is transmitted.
  • RLC radio link control
  • the temporary transmission window construction unit is configured to construct a temporary transmission window by storing an acknowledgment mode data protocol data unit (AMD PDU) sequence number (SN) value at the end of the last discarded SDU data, and corresponding to the SN value
  • the AMD PDU is used as the send window to construct a temporary send window.
  • the system further includes: a receiving end RLC entity, where the receiving end RLC entity includes a data receiving unit, where: the MRW process initiating unit is configured to send the MRW SUFI by means of a Status PDU or a Piggybacked Status PDU.
  • the data receiving unit is configured to: after receiving the PDU with the MRW SUFI, parse the Status PDU or the Piggybacked Status PDU, and move the receiving window, sending with a shift
  • the dynamic receiving window confirms the status packet of the super domain (MRW ACK SUFI), notifies the sending end that the RLC entity MRW process is successful; and then parses the AMD PDU received in the same transmission time interval ( ⁇ ); the MRW process initiating unit also sets To: After receiving the status packet with MRW ACK SUFI, move the send window and initialize the temporary send window to end the MRW process.
  • the bandwidth can be utilized to a greater extent in the MRW process, thereby increasing the transmission rate and not affecting the normal transmission of the MRW process.
  • FIG. 1 is a schematic diagram of a format of a MRW SUFI in an RLC AM mode
  • FIG. 2 is a schematic flowchart of a MRW process at a transmitting end according to an embodiment of the present invention
  • FIG. 3 is a schematic flowchart of a process of a receiving end MRW according to an embodiment of the present invention.
  • the core idea of the present invention is to provide a data transmission method, which is applied to a radio link control layer MRW process.
  • a temporary transmission window is constructed, so that it is outside the existing transmission window, but is completed in the MRW process.
  • the AMD PDU that satisfies the transmission requirement can be transmitted during the MRW process, thereby effectively utilizing the bandwidth and increasing the transmission rate.
  • the present invention provides a data transmission method, which is applied to an AM mode data transmission service, and the following technical solution is adopted:
  • the RLC entity at the transmitting end initiates the MRW process according to the discarding mode of the upper layer configuration SDU, and the sending a status PDU of the MRW SUFI; and constructing a temporary transmission window with the AMD PDU at the end of the discarded SDU data as the transmission window; the RLC entity of the transmitting end does not receive the Move Receiving Window Acknowledgement (MRW ACK) , still transmitting the AMD PDUs present in the temporary transmission window. Further, the sender RLC entity saves the AMD where the last discarded SDU data ends.
  • MRW ACK Move Receiving Window Acknowledgement
  • the PDU SN value, and the AMD PDU corresponding to the SN value is used as the transmission window to construct a temporary transmission window.
  • the AMD PDU corresponding to the SN value is taken as the window bottom, because the PDU of the first unsuccessful transmission is the bottom of the transmission window. Therefore, in order to ensure that the transmission window and the receiving window are synchronized, the AMD PDU corresponding to the SN value is taken as the bottom of the window.
  • the sender RLC entity passes the status protocol data unit (Status Protocol
  • a status packet with MRW SUFI is sent in the form of a Data Unit, Status PDU or a Piggybacked Status Protocol Data Unit (Piggybacked Status PDU).
  • the sending end RLC entity maintains the SDU data sent by the upper layer, and detects whether the SDU data of the sending end meets the SDU discarding condition according to the upper layer configuration. If yes, the sending end RLC entity discards the SDU data that meets the discarding condition, and initiates The MRW process.
  • the maintenance data refers to: receiving the SDU data sent by the upper layer, and maintaining the SDU data into a linked list, and saving the SN value of the AMD PDU at the end of the SDU when the AMD PDU is created.
  • the receiving end RLC entity After receiving the PDU with the MRW SUFI, the receiving end RLC entity first parses the Status PDU or the Piggybacked Status PDU, and moves the receiving window; and then parses the AMD PDU received in the same Transmission Time Interval (TTI). . Further, the receiving end RLC entity parses the Status PDU or the Piggybacked Status PDU, and after transmitting the receiving window, sends a status packet with the MRW ACK SUFI to notify the sending end that the MRW process is successful; after receiving the MRW ACK, the transmitting RLC entity sends the mobile packet. Window, and initialize the temporary send window to end the MRW process.
  • TTI Transmission Time Interval
  • FIG. 2 is a flowchart of a process of transmitting a terminal MRW according to an embodiment of the present invention.
  • the specific steps of the process are as follows: Step 201: The RRC entity of the sending end establishes an RLC AM entity, and configures the SDU discarding mode to discard the SDU of the explicit signaling.
  • the optional configuration is the timer-based explicit signaling discarding or the explicit based on the maximum number of transmissions. The signaling is discarded.
  • Step 202 When the SRC receives the SDU from the upper layer, the SDU maintains the SDU as a linked list, and saves the SN value of the AMD PDU at the end of the SDU when the AMD PDU is created. If the timer-based explicit signaling is discarded, step 203 is performed; if the upper-layer configuration SDU discarding mode is not timer-based explicit signaling discarding, step 204 is performed; Step 203: the sending end RLC entity is each SDU An SDU discard timer is started to detect whether the SDU is not successfully sent before the timer expires.
  • Step 204 The sender The RLC entity counts the number of times each AMD PDU is sent, and detects whether the number of times the PDU is sent exceeds the maximum number of retransmissions. If yes, discards all the SDUs in the AMD PDU, and performs step 205; Step 205: The sending end RLC entity searches for the AMD PDU where the last SDU node to be discarded is located according to the SN value information saved in step 202. Step 206: Set the AMD PDU SN to be the SN_MRWi value, and Set the temporary send window and use the bMrwWinFg flag to indicate whether the temporary send window is used.
  • Step 207 When the TTI boundary of the transport channel carrying the service arrives, the RLC sender counts the total number of AMD PDUs in the temporary send window and is to be sent.
  • Step 208 According to the bearer capability on the transport channel, the MRW SUFI may be sent to the receiving end in the form of a Piggybacked Status PDU or a Status PDU.
  • Step 209 The transmitting RLC entity waits for the MRW ACK.
  • step 207 If the MRW is not received within the indicated time, ACK, step 207 is performed, when the number of MRW SUFI transmissions reaches MaxMrw (MRW maximum number of transmissions), the RESET process is started; if the correct MRW ACK is received within the indicated time, step 210 is performed; Step 210: The receiving end RLC entity receives After MRW ACK, the actual send window is moved according to MRW ACK SUFI, and the bMrwWinFg flag and the corresponding temporary send window related variables are initialized.
  • MaxMrw MRW maximum number of transmissions
  • FIG. 3 is a flowchart of a process of receiving a terminal MRW according to an embodiment of the present invention.
  • the specific steps of the process are as follows: Step 301: After receiving the PDU in the TTI, the receiving RLC entity first parses the Piggybacked Status PDU or the Status PDU. And sending the reconfigurable SDU according to the SN_MRWi value indicated by the MRW SUFI in the Status PDU, and moving the receiving window; Step 302: After processing the Status PDU, parsing the AMD PDU received in the same TTI. At this time, the AMD PDUs are already in the receiving window; Step 303: The receiving RLC entity sends the MRW ACK to the transmitting end according to the receiving window movement condition.
  • the present invention can construct a temporary mobile transmission window without affecting the MRW process, so that the AMD PDU that satisfies the transmission requirement after the completion of the MRW process can be in the MRW process. Was sent in. Therefore, when the SDU needs to be discarded and the segment is outside the transmission window, the transmitting end can implement transmission of multiple PDU data in one TTI within the range of its carrying capacity, thereby improving the transmission rate.
  • the embodiment of the invention further provides a data transmission system, which is applied to the data transmission of the confirmation mode.
  • the system includes a sender RLC entity, and the sender RLC entity further includes an MRW process initiation unit, a temporary transmission window construction unit, and a data transmission unit, where: the MRW process initiation unit is configured to: initiate according to the discarding mode of the SDU After the MRW process, the status packet with the MRW SUFI is sent, and the temporary transmission window construction unit is notified; the temporary transmission window construction unit is configured to: when receiving the notification from the MRW process initiation unit, construct a temporary transmission window; The data transmission unit is configured to: send the AMD PDU existing in the temporary transmission window before receiving the MRW ACK sent by the receiving end RLC entity.
  • the temporary sending window construction unit is configured to construct a temporary sending window as follows: save the AMD PDU sequence number (SN) value at the end of the last discarded SDU data, and send the AMD PDU corresponding to the SN value as a sending At the bottom of the window, construct a temporary send window.
  • the system further includes: a receiving end RLC entity, the receiving end RLC entity further comprising a data receiving unit, wherein: the MRW process initiating unit is further configured to: pass a Status PDU or Piggybacked
  • the status PDU sends the status packet with the MRW SUFI;
  • the data receiving unit is configured to: after receiving the PDU with the MRW SUFI, parse the Status PDU or the Piggybacked Status PDU, and move the receiving window to send A status packet with a mobile receiving window acknowledgement super-domain (MRW ACK SUFI), notifying the sender RLC entity that the MRW process is successful; and re-parsing the AMD PDU received in the same TTI;
  • the MRW process initiating unit is further configured to: receive After the status packet with MRW ACK SUFI, the transmission window is moved, and the temporary transmission window is initialized, and the current MRW process is ended.
  • bandwidth can be utilized to a greater extent in the MRW process, thereby increasing the transmission rate without affecting the normal transmission of the MRW process.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Communication Control (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

L'invention concerne un procédé de transmission de données appliqué au service de transmission de données dans le mode avec accusé de réception (AM). Le procédé comprend les étapes suivantes : après lancement d'un processus de déplacement de fenêtre de réception (MRW) dans le mode de suppression d'une unité de données de service (SDU), l'entité de commande de la liaison radio (RLC) d'un terminal émetteur envoie un paquet d'état avec la superzone de déplacement de fenêtre de réception (MRW SUFI) et construit une fenêtre d'émission temporaire; avant de recevoir l'accusé de réception MRW envoyé par l'entité RLC d'un terminal de réception, l'entité RLC du terminal émetteur envoie l'unité de données de protocole de données du mode AM (AMD PDU) existante dans la fenêtre d'émission temporaire. L'invention concerne en outre un système de transmission de données. Celui-ci peut faire un meilleur usage de la bande passante pendant le processus MRW en utilisant les présentes solutions techniques, afin d'améliorer le débit d'émission sans influer sur la transmission normale du processus MRW.
PCT/CN2010/080024 2010-05-28 2010-12-20 Procédé et système de transmission de données Ceased WO2011147177A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201010188555.5A CN102264100B (zh) 2010-05-28 2010-05-28 一种数据传输方法及系统
CN201010188555.5 2010-05-28

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Publication number Priority date Publication date Assignee Title
CN106685604A (zh) * 2016-11-28 2017-05-17 北京新岸线移动通信技术有限公司 数据传输控制方法、系统及装置
CN107888992A (zh) * 2017-11-17 2018-04-06 北京松果电子有限公司 视频数据传输方法、接收方法、装置、存储介质及设备
CN111327403B (zh) * 2020-02-25 2022-03-22 中国电子科技集团公司第五十四研究所 一种增强的rlc层数据传输方法

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CN1553606A (zh) * 2003-05-30 2004-12-08 中兴通讯股份有限公司 无线链路控制层中发送窗口调整的方法
CN1829187A (zh) * 2005-02-28 2006-09-06 华为技术有限公司 一种保持分组数据协议汇聚子层序列号同步的方法
CN1949697A (zh) * 2005-10-14 2007-04-18 大唐移动通信设备有限公司 一种确保收发双方数据一致的数据传输方法
CN101478380A (zh) * 2008-01-03 2009-07-08 中兴通讯股份有限公司 一种自动重传请求窗口管理方法

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