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Method and apparatus for requesting data retransmission

A technology for requesting data and data retransmission, applied in digital transmission systems, transmission systems, error prevention/detection using return channels, etc., can solve problems affecting system throughput, increasing overhead, etc., to save overhead and speed up transmission , Improve the effect of retransmission efficiency

Active Publication Date: 2012-12-26
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In the process of realizing the present invention, the inventor found that there are at least the following problems in the prior art: when using the format of the status PDU of the prior art, a status PDU can only request the data retransmission of one data sender, if multiple data For retransmission, multiple status PDUs need to be sent, which increases the overhead and affects the throughput of the system

Method used

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  • Method and apparatus for requesting data retransmission
  • Method and apparatus for requesting data retransmission
  • Method and apparatus for requesting data retransmission

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Embodiment Construction

[0027] Below in conjunction with accompanying drawing and embodiment, the specific embodiment of the present invention is described in further detail:

[0028] The flow of a method for requesting data retransmission in an embodiment of the present invention is as follows: figure 2 As shown, taking the data retransmission of the RLC layer as an example, this embodiment includes the following steps:

[0029] Step s201, receiving a PDU and / or a PDU segment sent by a sender.

[0030] The RLC layer at the data sending end sends the RLC PDU and / or the PDU segment to the receiving end, and the receiving end receives the RLC PDU and / or the PDU segment.

[0031] Step s202, according to the data receiving status, the receiving end returns a status PDU to the sending end. If the data receiving end does not receive the RLC PDU and / or PDU segment correctly, it sends a non-confirmation status PDU to the data sending end, requesting the data sending end to retransmit the lost PDU and / or P...

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Abstract

The invention discloses a method for requesting data retransmission. Firstly a PUD and / or PDU segmentation is received from a transmission terminal; then according to the data reception condition, a state PDU is returned to the transmission terminal, wherein the state PDU comprises one or more receiving data information, the information comprises an extension field with a length of at least two-bit for the information combination of identification data. The invention also discloses a data receiving terminal comprising a data receiving unit, a detection unit and a state PDU generation unit. The method for requesting data retransmission retransmits a plurality of data through the information state PDU with a plurality of data, saves the consumption of the state PDU and improves the system retransmission efficiency.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a method and device for requesting data retransmission. Background technique [0002] With the rapid development of wireless communication technology, users have higher and higher requirements for service data transmission time, and when the data receiving end receives incorrect data, the data sending end needs to retransmit the lost data. [0003] Taking the data retransmission of the RLC (Radio Link Control, radio link control) layer as an example, in the prior art, the RLC layer of the data sending end receives the SDU (Service Packet Data Convergence Protocol) sent by the PDCP (Packet Data Convergence Protocol, packet data convergence) layer. After the RLC SDU is segmented and / or concatenated to generate an RLC PDU (Protocol Data Unit, protocol data unit), the RLC PDU is sent to the data receiving end. Each RLC PDU contains a SN (Sequence Number, seria...

Claims

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Application Information

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IPC IPC(8): H04L1/18H04L1/00H04L1/16
Inventor 邵飞
Owner HUAWEI TECH CO LTD
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