Method and device for requesting data retransmission

A technology for requesting data and data retransmission, which is applied in the direction of using the return channel for error prevention/detection, etc. It can solve problems affecting system throughput and increasing overhead, and achieve the effects of saving overhead, speeding up sending, and improving retransmission efficiency

Active Publication Date: 2013-05-01
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

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  • Method and device for requesting data retransmission
  • Method and device for requesting data retransmission
  • Method and device 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. According to the method, PDU (protocol data unit) and / or PDU fragments sent by a sending end are received; then, the state PDU is returned to the sending end according to the data receiving condition, the state PDU comprises one or a plurality data receiving messages, the messages comprise expanding fields E with the length being at least two bits, and the expanding fields are used for marking data message combination. The invention also discloses a data receiving end, which comprises a data receiving unit, a detecting unit and a state PDU generating unit. A plurality of data is retransmitted through one message state PDU carried with a plurality of data, the expenditure of the state PDU is saved, and the retransmission efficiency of the system is improved.

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 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, serial numbe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/18
Inventor 邵飞
Owner HUAWEI TECH CO LTD
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