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A method for controlling transmit frequency of status report

A technology of sending frequency and control status, applied in the field of data unit status reporting, can solve the problems of resource occupation, impact of sending entities, long time, etc., to achieve the effect of improving utilization, reducing redundant retransmission PDUs, and reducing transmission

Inactive Publication Date: 2008-01-02
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

If the sending entity receives multiple status reports containing NACK returned by the receiving entity, the sending entity is the delay for the PDU from the first sending of the PDU to the last retransmission of the PDU. Obviously, this period The delay time is long, occupying the resources of the sending entity, and will also have a certain impact on the work of the sending entity
The prior art does not solve this problem at present

Method used

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  • A method for controlling transmit frequency of status report
  • A method for controlling transmit frequency of status report
  • A method for controlling transmit frequency of status report

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Embodiment Construction

[0044] The analysis shows that there are two main reasons for the problem of redundant data transmission. On the one hand, because there is a delay in the transmission of PDUs and status reports in the communication system, after the sending entity sends a PDU, at least one loop time (RTT) is required to obtain information about whether the receiving entity has correctly received the PDU. Due to the delay, the following steps will occur:

[0045] Step A: The sending entity sends a PDU for the first time, and the PDU has an error during transmission, that is, it is not sent to the receiving entity;

[0046] Step B: The receiving entity detects that the PDU is lost, and sends a status report containing NACK to the sending entity;

[0047] Step C: After receiving the status report for the PDU, the sending entity transmits the PDU to the receiving entity for the second time, that is, retransmits the PDU;

[0048] Step D: Due to the delay, before receiving the PDU retransmitted by the ...

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Abstract

The invention discloses a method for controlling transmit frequency of status report, which sets transmitting conditions for the status report sent from the receiving entity to the transmitting entity, containing NACK; before transmitting the status report containing NACK from the receiving entity to the transmitting entity, aiming at each PDU which is not correctly received by receiving entities in the investigation scope of the status report, judge if it meets the preset transmitting condition of NACK currently, if it does not meet, the PDU's NACK will not be contained in the status report; or the PDU's NACK is allowed to be contained in the status report. The invention solves the problems about redundant PDU and status report transmission in existing technology. On the precondition of not influencing the transmission of status report containing NACK, the invention restricts the transmission of status report containing NACK, reduces the transmission of redundant status report and retransmission of redundant PDU, improves the usage of communication link.

Description

Technical field [0001] The present invention relates to the technical field of data unit status reports, and more specifically to a method for controlling the sending frequency of status reports in an automatic retransmission request mechanism of a wireless communication system. Background technique [0002] The Universal Mobile Telecommunication System (UMTS) is a third-generation mobile communication system that uses Wideband Code Division Multiple Access (WCDMA) air interface technology, and is also commonly referred to as a WCDMA system. [0003] The wireless interface of WCDMA is divided into physical layer, data link layer and 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) to realize segmentation, cascading, filling, error control, and flow control , Repeatability testing and other functions. Among them, the RLC AM entity includes a sending entity and a rece...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/18
Inventor 杨学志丁颖哲许炳曲秉玉
Owner HUAWEI TECH CO LTD
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