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Management method for automatic retransmission request window

An automatic retransmission request and window management technology, which is applied in the direction of using the return channel for error prevention/detection, etc., can solve the legacy problems of LTE wireless interface SDUDiscard, etc., to avoid waste of wireless resources, avoid timer overtime, and avoid buffer overload Effect

Active Publication Date: 2009-07-08
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0024] The technical problem to be solved by the present invention is to provide an automatic retransmission request window management method of an AM RLC entity for the legacy problem of the current LTE wireless interface SDU Discard, which avoids the waste of wireless resources and unfair phenomena caused by SDU discarding, At the same time avoid the complexity of the Send MRW mechanism

Method used

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  • Management method for automatic retransmission request window
  • Management method for automatic retransmission request window
  • Management method for automatic retransmission request window

Examples

Experimental program
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no. 1 example

[0047] figure 2 The flow process of the ARQ window management method of the AM RLC entity in the present embodiment has been described. The receiving end starts the timer when creating a receiving window or after the lower boundary of the receiving window is updated for the first time, and then performs the following steps:

[0048] Step 110, the receiving end receives the RLC PDU;

[0049] Step 120, judging whether the Timer_Release has timed out? If no, go to step 130, if yes, go to step 160;

[0050] Step 130, judge whether the RLC PDU corresponding to the lower boundary of the current receiving window (i.e. the current VR (R)) or all RLC PDU segments are successfully received, if not, perform step 140, if successfully received, perform step 150;

[0051] Step 140, when triggering the next status report, include VR(R) in the status report, that is, the non-confirmation response message NACK of the lower boundary of the receiving window, and may also include VR(R) in the ...

no. 2 example

[0065] image 3 The flow process of the ARQ window management method of the AM RLC entity receiving end of the present embodiment is described, and the specific steps are as follows:

[0066] Step 210, the receiving end receives the RLC PDU;

[0067] Step 220, judging whether the RLC PDU corresponding to the lower boundary of the current receiving window or all RLC PDU segments are successfully received, if successfully received, perform step 230, if not successfully received, perform step 240;

[0068] Step 230, feed back the status report, move the receiving window and deliver the RLC PDU or RLC PDU segments in the manner of successfully receiving the RLC PDU or all RLC PDU segments, and turn to step 210;

[0069] Step 240, judging whether the number of transmissions of the status report containing the non-confirmation response message NACK of the lower boundary of the current receiving window has reached the preset number of times, if not, go to step 250; if yes, go to ste...

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Abstract

The invention discloses an automatic repeat request (ARQ) window management method which is characterized in that receiving terminals of layer entity are controlled by use of wireless links of confirmation mode; and when the sections of the wireless link control protocol data cell corresponding to the lower boundary of the currently-received window or all the wireless link control protocol data cells are not received successfully and the preset conditions are met, the receiving window are triggered to move continuously. The ARQ window management method overcomes the problems of wireless resource waste and unfairness when the service data unit (SDU) is discarded, and avoids the complexity of sending the move receiving window (Send MRW).

Description

technical field [0001] The invention relates to the technical field of digital mobile communication, in particular to an automatic repeat request (ARQ) window management method in a wireless communication system. Background technique [0002] The radio link control layer (RLC: Radio Link Control) of the wireless interface of the third-generation mobile communication system WCDMA (Wideband Code Division Multiple Access) includes three types of RLC entities: transparent mode (TM: Transparent Mode), unacknowledged mode (UM: Unacknowledged Mode) and confirmation mode (AM: Acknowledged Mode). The TM RLC entity and the UM RLC entity can be configured as a sending RLC entity or a receiving RLC entity, where the sending RLC entity sends a Radio Link Control Protocol Data Unit (RLC PDU: Radio Link Control Protocol Data Unit), and the receiving RLC entity receives an RLC PDU. The AM RLC entity includes a sending end and a receiving end, where the AM RLC entity at the sending end send...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/18
Inventor 张健阮象华杨阳
Owner ZTE CORP
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