WO2007121635A1 - Procédé de retransmission d'une unité de données de commande d'un protocole de commande à liaison sans fil en mode de reconnaissance - Google Patents

Procédé de retransmission d'une unité de données de commande d'un protocole de commande à liaison sans fil en mode de reconnaissance Download PDF

Info

Publication number
WO2007121635A1
WO2007121635A1 PCT/CN2006/003680 CN2006003680W WO2007121635A1 WO 2007121635 A1 WO2007121635 A1 WO 2007121635A1 CN 2006003680 W CN2006003680 W CN 2006003680W WO 2007121635 A1 WO2007121635 A1 WO 2007121635A1
Authority
WO
WIPO (PCT)
Prior art keywords
data unit
control data
retransmission
control
threshold
Prior art date
Application number
PCT/CN2006/003680
Other languages
English (en)
Chinese (zh)
Inventor
Yunxiang X?
Original Assignee
Zte Corporation
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 Corporation filed Critical Zte Corporation
Publication of WO2007121635A1 publication Critical patent/WO2007121635A1/fr

Links

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

Definitions

  • the present invention relates to a wideband code division multiple access system, and more particularly to a retransmission of a 4-space data unit in a wireless network controller protocol acknowledgement mode.
  • Strategy. BACKGROUND In a WCDMA (Wideband Code Division Multiple Access) system, there are three data transmission methods in the RLC (Radio Link Control) protocol layer of an RNC (Radio Network Controller) network element: Transparent mode (TM), unacknowledged mode (UM), and acknowledge mode (Acknowledged mode, ⁇ ).
  • TM Radio Link Control
  • UM unacknowledged mode
  • acknowledge mode Acknowledged mode
  • the AM mode ensures the reliable transmission of data through the transmission confirmation process between the data sender and the data receiver.
  • the protocol architecture is shown in Figure 1.
  • the data transmission process is: a) Sender (transmitter) receives RLC SDU (Service Data Unit service data unit) sent from higher layer > generates RLC PDU (Protocol Data Unit control data unit); b) Sender sends RLC according to transmission capability PDU, update the send window, and the LC PDU is stored in the retransmission sequence until the send window closes to stop sending the AMD PDU; c) The Receiver RLC protocol layer receives the RLC AMD PDU, and if properly received, the Receiver sends an ACK (acknowledgement) status to the Sender.
  • RLC SDU Service Data Unit service data unit
  • RLC PDU Protocol Data Unit control data unit
  • Sender sends RLC according to transmission capability PDU, update the send window, and the LC PDU is stored in the retransmission sequence until the send window closes to stop sending the AMD PDU
  • the Receiver RLC protocol layer receives the RLC AMD PDU, and if properly received, the Receiver sends an ACK (acknowledge
  • ACK STATUS REPORT otherwise send NACK (NACK STATUS REPORT); d) Sender receives Receiver status report, according to the type of status report, if it is ACK, it will retransmit the corresponding sequence
  • the RLC PDU is deleted, and the transmission window is updated. If it is a NACK, the corresponding RLC PDU is retransmitted, and the retransmitted RLC PDU has a higher priority than the first transmitted RLC PDU.
  • the number of AMD PDUs sent by the Sender is controlled by the TFC (Transport Format). Therefore, the effective rate of the transmission is limited by the number of retransmitted AMD PDUs. When the number of retransmitted AMD PDUs increases, the effective data transmission rate decreases. . Receiver status report (STATUS REPORT) according to 3GPP TS 25.322 protocol
  • Timer—Status_Prohibit is in an invalid or timeout state.
  • Receiver sends a status report to Sender.
  • Sender determines the total number of AMD PDUs (including retransmitted AMD PDUs) sent in the next scheduling period based on the status.
  • the Receiver is usually required to send a STATUS REPORT to the Sender in time, so that the Sender can update the sliding window in time to ensure that the Sender can update the sliding window in time.
  • Normal delivery of business data Assuming the traffic rate is V, the valid data payload of the AMD PDU is b, and the transmission window is W.
  • the latest time to receive the first STATUS is Wb/V, so if the traffic rate is larger, the required time interval is shorter.
  • Sender will cause the data to be sent to 0 because the send window is closed.
  • Sender assumes that the Sender received the NACK status of the A PDU at time t1, and then resends the A PDU.
  • the status report of this retransmission will be received after 180ms, and for Receiver, the status report will be sent to Sender after 80ms at the latest, and the A PDU will still be reported to Sender, and the Sender A PDU will be notified to be lost.
  • the status report will be received 130 minutes after Sender resends the A PDU (assuming Sender to Receiver ⁇ network delay and Receiver to Sender network delay ⁇ then, for Sender, the A PDU is unnecessarily retransmitted Processing, wasting transmission bandwidth.
  • the report prohibits the timer from being generally set to 20ms, and the network delay is calculated by 100ms, which is at least 6 times the network error rate.
  • the present invention provides a retransmission method of a control data unit of a radio link control protocol in an acknowledge mode, which is characterized in that it comprises: adding a state variable in a control data unit, and transmitting a control data unit each time The state variable is marked with a system time label; if a negative answer of the control data unit is received, a difference between the current system time and the time label is calculated, and the control data is performed by the difference Retransmission control of the unit to reduce the retransmission frequency.
  • the above method is characterized in that: performing retransmission control of the control data unit by using the difference, comprising: determining whether the difference is greater than a threshold, and retransmitting the control data unit, otherwise giving up hair.
  • Step 1 The transmitter of the radio link control protocol layer receives the control data unit from the upper layer; Step 2, the transmitter adds the state variable to the control data unit And the state variable is marked with a system time label; Step 3, the transmitter sends the control data unit to a receiver of a radio link control protocol layer, and stores the control data unit in a retransmission sequence; Step 4: The transmitter receives a status report from the receiver, and if the status report is a negative response of the control data unit, calculating a difference between a current system time and the time label; Step 5: If it is determined whether the difference is greater than a threshold value, the system time label of the control data unit is updated and the process proceeds to step 3 to resend the control data unit, otherwise the retransmission is abandoned.
  • the above method is characterized in that the threshold value is set according to a status report interval t and a network loopback delay T in the radio link control protocol.
  • the above method is characterized in that, if t > T, the threshold value is set to -1, and in the step 5, the method further includes: if the threshold value is -1, exiting the processing flow; If t ⁇ ⁇ , the threshold is set to ⁇ % ⁇ , where the parameter X is a value configured according to the actual application.
  • the above method is characterized in that the parameter X is 80.
  • the method further includes: if the status is a confirmation response of the control data unit, and 4 is updated according to the sequence number of the control data unit that is correctly received.
  • the present invention adopts a method of time stamping a PDU in a retransmission queue, and when a retransmission is required, calculating a difference between a current time and a time cu of the PDU, when the threshold of the difference is greater than a certain threshold Retransmission is performed, otherwise the retransmission is abandoned to reduce the overhead of network retransmission.
  • FIG. 1 is a schematic diagram of a structure of a mode of operation of a mode 8;
  • FIG. 2 is a flow chart of a method for retransmitting an RLC AM mode provided by the present invention.
  • DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The implementation of the technical solution will be further described in detail below with reference to the accompanying drawings.
  • the method of the present invention mainly adds an RLC State Variable (VT), when the AMD PDU is sent (including retransmission), Put VT (TAG) on the system time stamp.
  • VT RLC State Variable
  • TAG Put VT
  • TAG Volume VT
  • the threshold TimeThreshold it is related to the Status Report interval network loopback delay in the RLC AM protocol.
  • the Status and the Polling related parameters in the protocol are related to the Status Report related parameters. Assuming the Status Report interval is t and the network loopback delay is ⁇ , then the following setting strategy can be used:
  • ⁇ t > ⁇ that is, the Status Report interval is greater than the network loopback delay
  • set the TimeThreshold to -1, indicating that the processing of the data is not processed in the processing of data transmission and reception (that is, if the status report interval
  • the correlation processing performed by the present invention is not performed, that is, when the lost PDU is retransmitted, it is necessary to judge the ratio of the time interval between the last retransmission and the retransmission to the threshold)
  • t ⁇ T that is, the Status Report interval is less than the network loopback delay
  • set TimeThreshold T* 80%, where the percentage is a configurable value to be flexible in practical applications.
  • Step 201 The Sender RLC protocol layer receives a high-level RLC AMD PDU (numbered a); Step 202 Sender sends the RLC AMD PDU to the Receiver and stores it in the retransmission sequence. Step 203: The status variable VT (TAG) of the currently sent AMD PDU will be updated. Step 204: Determine whether the Sender receives the status report sent by the Receiver.
  • Step 205 Determine whether it is NACK, if yes, go to step 206, otherwise go back to step 201;
  • the method of the present invention can also be subdivided into the following steps: l)
  • the Sender AM RLC entity receives the RLC SDU sent from the upper layer.
  • the AM RLC entity divides or cascades the RLC SDU to construct the LC AMD PDU.
  • the AM RLC entity divides or cascades the RLC SDU to construct the LC AMD PDU.
  • Receiver After Receiver receives the PDU sent by Sender, Receiver sends Status Report to Sender according to the setting of status report system parameters.
  • the Sender After receiving the Receiver, the Sender updates the sending window according to the sequence number of the correctly received PDU, ensuring that the sending window does not close.
  • Sender calculates SystemTime - VT(TAG), where SystemTime is the current time of the system, and VT(TAG) is the time stamp sent when the AMD PDU is sent.
  • the receiver Since the status report interval is 20ms, starting from the 46th TTI, 48, 50, 52, 54, 56, 58 TTI The status report is sent.
  • the receiver receives the 113 AMD PDU retransmitted by the sender at 54 TTI, and informs the sender in the status report that the AMD PDU No. 113 is not retransmitted.
  • the sender will receive a status report of the lost A13 PDU at 56, 58, 60, 62, 64, 66 TTI for retransmission.
  • the receiver At the 68th TTI, the receiver will receive the sender's transmission at 60 TTI.
  • the ACK of the No. 113 PDU is not retransmitted in 4 ⁇ .
  • the sender does not retransmit the 113 AMD PDIL at the 68th TTI.
  • retransmission of the 113 AMD PDU at 56 to 66 TTI is repeated, wasting system bandwidth.
  • the method can effectively solve the problem of resource waste and bandwidth utilization caused by retransmission in the WCDMA high-rate service by setting the AMD PDU time label.

Landscapes

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

Abstract

L'invention concerne un procédé de retransmission d'une unité de données de commande d'un protocole de commande à liaison sans fil en mode de reconnaissance qui consiste: à ajouter un état variable dans l'unité de données de commande; à placer une étiquette de temps système sur l'état variable durant la transmission de chaque unité de données de commande; si la question négative de l'unité de données de commande est reçue, la valeur différente entre le temps système réel et l'étiquette de temps est calculée, la commande de retransmission d'unité de données de commande réalisée par la valeur différente, et la fréquence de transmission est réduite. Le problème de gaspillage de ressources de retransmission dans le système WCDMA pouvant être résolu de manière efficace, la fréquence d'utilisation de largeur de bande peut être augmentée, et les ressources systèmes sont sauvegardées.
PCT/CN2006/003680 2006-04-24 2006-12-29 Procédé de retransmission d'une unité de données de commande d'un protocole de commande à liaison sans fil en mode de reconnaissance WO2007121635A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CNA2006100117754A CN101064587A (zh) 2006-04-24 2006-04-24 确认模式下无线链路控制协议的控制数据单元的重传方法
CN200610011775.4 2006-04-24

Publications (1)

Publication Number Publication Date
WO2007121635A1 true WO2007121635A1 (fr) 2007-11-01

Family

ID=38624533

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2006/003680 WO2007121635A1 (fr) 2006-04-24 2006-12-29 Procédé de retransmission d'une unité de données de commande d'un protocole de commande à liaison sans fil en mode de reconnaissance

Country Status (2)

Country Link
CN (1) CN101064587A (fr)
WO (1) WO2007121635A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102487533A (zh) * 2010-12-03 2012-06-06 鼎桥通信技术有限公司 高速分组接入系统中传输无线链路控制信息的方法及装置
CN108809510A (zh) * 2017-05-05 2018-11-13 华为技术有限公司 一种数据传输的处理方法和装置

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101453311B (zh) * 2007-11-29 2011-12-28 中兴通讯股份有限公司 一种自动重传请求状态报告的触发方法
US8910006B2 (en) * 2008-09-12 2014-12-09 Infineon Technologies Ag Systems and methods for regulating delay between network interfaces
WO2017132925A1 (fr) 2016-02-04 2017-08-10 华为技术有限公司 Procédé et appareil d'optimisation de transmission pour l'internet des objets, et dispositif
WO2019028826A1 (fr) 2017-08-11 2019-02-14 Qualcomm Incorporated Techniques de réassemblage de commande de liaison radio dans des systèmes sans fil
CN109802767A (zh) * 2017-11-16 2019-05-24 夏普株式会社 无线通信方法和设备

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1430833A (zh) * 2001-01-18 2003-07-16 皇家菲利浦电子有限公司 在基于否定确认的协议中有效重发超时估计的方法
WO2005018194A1 (fr) * 2003-08-14 2005-02-24 International Business Machines Corporation Amelioration des performances d'un reseau tcp lors du reordonnancement de paquets

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1430833A (zh) * 2001-01-18 2003-07-16 皇家菲利浦电子有限公司 在基于否定确认的协议中有效重发超时估计的方法
WO2005018194A1 (fr) * 2003-08-14 2005-02-24 International Business Machines Corporation Amelioration des performances d'un reseau tcp lors du reordonnancement de paquets

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ZHANG W. AND WANG S.: "Research on TCP Congestion Control Algorithm Based on Time Stamp in Satellite Network", JOURNAL OF NANJING INSTITUTE OF POSTS AND TELECOMMUNICATIONS, vol. 25, no. 2, April 2005 (2005-04-01), pages 24 - 25 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102487533A (zh) * 2010-12-03 2012-06-06 鼎桥通信技术有限公司 高速分组接入系统中传输无线链路控制信息的方法及装置
CN102487533B (zh) * 2010-12-03 2015-02-04 鼎桥通信技术有限公司 高速分组接入系统中传输无线链路控制信息的方法及装置
CN108809510A (zh) * 2017-05-05 2018-11-13 华为技术有限公司 一种数据传输的处理方法和装置
CN108809510B (zh) * 2017-05-05 2023-02-28 华为技术有限公司 一种数据传输的处理方法和装置

Also Published As

Publication number Publication date
CN101064587A (zh) 2007-10-31

Similar Documents

Publication Publication Date Title
KR100996069B1 (ko) 이동통신 시스템에서 라디오 링크 제어 계층의 데이터 전송 방법 및 장치
TWI483589B (zh) 資料傳輸及重新傳輸之方法
US7761767B2 (en) Method and apparatus for retransmission management for reliable hybrid ARQ process
TWI489816B (zh) 由一無線傳輸/接收單元(wtru)實施的方法以及無線傳輸/接收單元
US8116250B2 (en) Medium access control discard notification
US7870259B2 (en) Method and transmitter for an efficient packet data transfer in a transmission protocol with repeat requests
KR101577451B1 (ko) Ｒｌｃ 무한 재전송 오류를 검출하고 처리하는 방법
US11039328B2 (en) Technique for monitoring a radio link control (RLC)
JP5143225B2 (ja) 別チャネルのステータスレポートの順序の乱れた配信
EP2214435A1 (fr) Transmissions et retransmissions efficaces d'unité de données paquets impliquant un noeud de relais
WO2007050231A2 (fr) Procede et dispositif de gestion de la retransmission selon un procede arq hybride fiable
WO2007121635A1 (fr) Procédé de retransmission d'une unité de données de commande d'un protocole de commande à liaison sans fil en mode de reconnaissance
KR101024461B1 (ko) 전송 윈도우를 사용하는 통신 시스템에서의 최적화된 패킷 데이터 전송 프로토콜
RU2392752C2 (ru) Способ передачи данных и способ повторной передачи данных
US20150078251A1 (en) Communication terminal device and method for operating a communication terminal device
WO2007124634A1 (fr) Procédé de retransmission de données dans le protocole de commande de liaison radio
EP1852995B1 (fr) Procédé et appareil de manipulation d'une variable d'une procédure de réinitialisation RLC au cours du rétablissement du récepteur uniquement dans un système de communication sans fil
KR100912785B1 (ko) 상태 보고를 보고하는 방법 및 수신기
Xiang et al. User Plane Protocol Optimization in Cellular Networks with Decode-and-Forward Type of Relay

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 06840710

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 06840710

Country of ref document: EP

Kind code of ref document: A1