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Method for retransmitting data in wireless link control protocol

A wireless link control, protocol data unit technology, applied in the field of data retransmission mechanism, can solve the problem of data PDU bandwidth waste and other problems

Inactive Publication Date: 2007-10-31
ZTE CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for data retransmission in the wireless link control protocol, which solves the problem of bandwidth waste caused by multiple retransmissions of data PDUs in the prior art when status reports are relatively frequent.

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  • Method for retransmitting data in wireless link control protocol

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Embodiment Construction

[0023] Specific embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0024] The present invention provides an improved method for the RLC AM data PDU retransmission mechanism, which can solve the problem of bandwidth waste caused by multiple retransmissions of the data PDU in the case of frequent status reports, reduce the number of invalid retransmissions, and improve Bandwidth utilization efficiency.

[0025] Concrete scheme of the present invention is as follows:

[0026] For a certain RLC AM data PDU, it is denoted as PDU(i). After the PDU(i) is sent or retransmitted to the lower layer, a timer Timer_Retransmit_Prohibit is started for the PDU(i), denoted as Timer_trp(i). If a status report from the receiving end is received indicating that the PDU(i) has not been received correctly, the sending end will put the PDU(i) into the retransmission buffer and wait for retransmission. When scheduling the...

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Abstract

The invention discloses a method of data retransmit in wireless chain control protocol, it characterized in that the sending end sends protocol data unit in wireless chain control protocol affirmance mode, setting a timer corresponding with said data unit, if the sending end receives the state report of un-received correctly come from receiving end, the sending end puts said data unit into the retransmit buffer, and detects whether the timer which is corresponding with said data unit is overtime during attemper course of buffer, if it is overtime, sending said data unit and starting corresponding timer, if else, waiting for next buffer attemper. The invention resolves problem of bandwidth waste induced by retransmit by protocol data unit on condition that the state report is frequent, the time of retransmit is decreased, and the utilization efficiency of bandwidth is increased.

Description

technical field [0001] The invention relates to a wireless link control protocol in the third generation mobile communication system, in particular to an improved method of the data retransmission mechanism in the confirmation mode of the protocol. Background technique [0002] In the radio link control protocol (RLC), the RLC acknowledgment mode (AM) entity enables the sending end to obtain the receiving status of the receiving end through a mechanism in which the receiving end feeds back a status report to the sending end. For the data PDUs that are not correctly received in the status report ( Protocol Data Unit, protocol data unit), the sender needs to retransmit these PDUs. In the Release 6 version of the RLC protocol, there are three mechanisms for triggering the status report of the receiving end: 1) receiving the polling from the sending end; 2) the upper layer is configured with a mechanism for detecting lost PDUs; 3) the upper layer is configured with a mechanism f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L29/06
CPCH04L1/188H04L69/28H04W80/02
Inventor 杨阳王前
Owner ZTE CORP
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