WO2003081837A1 - Procede de commande d'erreur a demande a repetition automatique arq pour differents canaux et dispositif associe - Google Patents

Procede de commande d'erreur a demande a repetition automatique arq pour differents canaux et dispositif associe Download PDF

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Publication number
WO2003081837A1
WO2003081837A1 PCT/CN2002/000207 CN0200207W WO03081837A1 WO 2003081837 A1 WO2003081837 A1 WO 2003081837A1 CN 0200207 W CN0200207 W CN 0200207W WO 03081837 A1 WO03081837 A1 WO 03081837A1
Authority
WO
WIPO (PCT)
Prior art keywords
packet data
transmitting end
data
channel
sequence number
Prior art date
Application number
PCT/CN2002/000207
Other languages
English (en)
Chinese (zh)
Inventor
Xiaobin Wu
Xiaohua Liu
Chengming Wu
Original Assignee
Linkair Communications, Inc.
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 Linkair Communications, Inc. filed Critical Linkair Communications, Inc.
Priority to AU2002252926A priority Critical patent/AU2002252926A1/en
Priority to PCT/CN2002/000207 priority patent/WO2003081837A1/fr
Publication of WO2003081837A1 publication Critical patent/WO2003081837A1/fr

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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
    • H04L1/1607—Details of the supervisory signal
    • H04L1/1628—List acknowledgements, i.e. the acknowledgement message consisting of a list of identifiers, e.g. of sequence numbers
    • 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
    • H04L1/1803—Stop-and-wait protocols

Definitions

  • the reliability of data transmission refers to the performance that the receiver can detect or automatically correct errors caused by noise interference when data is transmitted on the channel.
  • Error control coding technology is one of the most effective methods to improve the reliability of data transmission.
  • ARQ methods can be divided into numbered ARQ methods and unnumbered ARQ methods.
  • each data packet is assigned a group number, which allows the destination to determine which data packets have arrived correctly and which The data packet has arrived by mistake. In this way, the data packet does not have to reach the destination in the order in which they were transmitted from the source.
  • packet-switched networks transmit successive packets along different paths with different delays. Therefore, the data packet May arrive out of order.
  • the grouping number of the ARQ method the data packets can be reordered in the correct order at the destination.
  • the well-known numbered ARQ method is to choose the retransmission ARQ method.
  • the delay between the transmission of a data packet and the arrival of an acknowledgement is called the round trip delay.
  • the round trip delay determines the data throughput of the network.
  • the longer the round trip delay the source can launch a new The longer the data packet waits before resending the NAK data packet.
  • the data throughput on the communication link is inversely proportional to the round-trip delay between the source and destination. Because during the waiting period, the source is idle and no transmission occurs, in order to maintain high data throughput, stop and wait.
  • ARQ method is usually used in networks with short round trip delays. In networks with long round trip delays, the sender needs more time to wait for a response from the receiver after sending data, and will not send new messages during this period.
  • the present invention provides an ARQ error control method for automatic retransmission requests for different channels, including:
  • the receiving end receives the packet data to which the sequence number is added
  • the receiving of the packet data with an increased sequence number by the receiving end means that: the receiving end performs a CRC check on the received packet data,
  • the dual channels can be set as odd channels and even channels, where:
  • the dual channels can be set as odd channels and even channels, where:
  • the dual channels can be set as odd channels and even channels, where:
  • the receiving of the packet data with an increased sequence number by the receiving end means that the receiving end performs an odd channel CRC check on the received packet data transmitted from the odd channel, and performs the received packet data transmitted from the even channel.
  • Even channel CRC check means that the receiving end performs an odd channel CRC check on the received packet data transmitted from the odd channel, and performs the received packet data transmitted from the even channel.
  • the method further includes: when the transmitting end adds a sequence number to the packet data to be transmitted, if the sequence number obtained by the new packet data and the sequence number of the packet data that needs to be retransmitted have not been correctly received, At the same time, the sending of new packet data should be stopped, and only the packet data that has not been received correctly should be retransmitted. Until the packet data is received correctly, that is, when the transmitting terminal receives the ACK signal of the packet data, it will continue to perform parallel processing. Sending of data.
  • the device is characterized in that it further comprises a FIFO buffering device and a packetizer.
  • the transmitting end performs FIFO buffering on the packet data to be transmitted through the FIFO buffering device, and then adds a sequence number to the buffered packet data through an adding device, and
  • the packet data to which the sequence number is added is packetized by a packetizer, and then the packet data is selected to be transmitted on an appropriate channel.
  • the packet data may be new packet data or retransmitted packet data.
  • the transmitting end performs FIFO buffering on the packet data to be transmitted through the FIFO buffer device, and then adds a sequence number to the buffered packet data through an ordering device, and performs packet processing on the packet data with the sequence number added by a packetizer, and then selects the appropriate Sending packet data on the channel of the packet, the packet data may be new packet data or may be retransmitted packet data;
  • FIG. 1 is a sequence diagram of a stop-wait ARQ method for transmitting data packets in the prior art
  • the transmitting end Assuming that there is no error in the acknowledgement information returned, only the data packets that failed during transmission are retransmitted. If the sender does not receive the ACK or NAK of the receiver within the expected time, then the sender retransmits this unresponded data Grouping. For example, because the receiving end does not receive the fourth data packet represented by the number 4 sent by the sending end, the sending end has never received the ACK or NAK of the fourth data packet. After the pause period, the sending end Resend the fourth data packet.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
  • Communication Control (AREA)

Abstract

La présente invention concerne un procédé de commande d'erreur a demande à répétition automatique ARQ pour différents canaux et un appareil associé, caractérisé en ce que les procédés ARQ d'arrêt et d'attente dans différents canaux sont indépendants et que les paquets de données sont transmis en parallèle. A l'aide du rapport entre les nombres séquentiels des paquets de données à envoyer et à renvoyer, on décide si le côté de transmission devrait envoyer lesdits paquets de données. La réception desdits paquets de données dans le côté de réception est assurée par l'augmentation du nombre séquentiel. Grâce au procédé de commande d'erreur de cette invention, on peut mettre en oeuvre une transmission désordonnée de paquets de données dans la technologie DSW en définissant le nombre séquentiel que l'on peut appliquer à un système de communication sans fil pour un service de données de paquets haute vitesse et en vue de l'augmentation de la disponibilité des ressources des canaux.
PCT/CN2002/000207 2002-03-27 2002-03-27 Procede de commande d'erreur a demande a repetition automatique arq pour differents canaux et dispositif associe WO2003081837A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU2002252926A AU2002252926A1 (en) 2002-03-27 2002-03-27 An automatic repeat request arq error control method for different channels and the device thereof
PCT/CN2002/000207 WO2003081837A1 (fr) 2002-03-27 2002-03-27 Procede de commande d'erreur a demande a repetition automatique arq pour differents canaux et dispositif associe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2002/000207 WO2003081837A1 (fr) 2002-03-27 2002-03-27 Procede de commande d'erreur a demande a repetition automatique arq pour differents canaux et dispositif associe

Publications (1)

Publication Number Publication Date
WO2003081837A1 true WO2003081837A1 (fr) 2003-10-02

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2002/000207 WO2003081837A1 (fr) 2002-03-27 2002-03-27 Procede de commande d'erreur a demande a repetition automatique arq pour differents canaux et dispositif associe

Country Status (2)

Country Link
AU (1) AU2002252926A1 (fr)
WO (1) WO2003081837A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013037322A1 (fr) * 2011-09-16 2013-03-21 华为技术有限公司 Procédé et dispositif de réception et d'émission de fragments

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1275279A (zh) * 1997-08-19 2000-11-29 艾利森电话股份有限公司 一种多信道自动重发查询(arq)方法
WO2001048958A1 (fr) * 1999-12-29 2001-07-05 Motorola Inc. Procede et appareil de communication a canaux multiplesarq a arret/attente
US6330699B1 (en) * 1996-08-23 2001-12-11 Nippon Telegraph & Telephone Corporation Error compensating method and apparatus and medium storing an error compensating program

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6330699B1 (en) * 1996-08-23 2001-12-11 Nippon Telegraph & Telephone Corporation Error compensating method and apparatus and medium storing an error compensating program
CN1275279A (zh) * 1997-08-19 2000-11-29 艾利森电话股份有限公司 一种多信道自动重发查询(arq)方法
WO2001048958A1 (fr) * 1999-12-29 2001-07-05 Motorola Inc. Procede et appareil de communication a canaux multiplesarq a arret/attente

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013037322A1 (fr) * 2011-09-16 2013-03-21 华为技术有限公司 Procédé et dispositif de réception et d'émission de fragments
US9622256B2 (en) 2011-09-16 2017-04-11 Huawei Technologies Co., Ltd. Method and apparatus for receiving fragment as well as method and apparatus for transmitting fragment

Also Published As

Publication number Publication date
AU2002252926A1 (en) 2003-10-08

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