A method for triggering automatic retransfer request status report

Abstract

The utility model relates to a trigger method for an ARQ (automatic retransmission request) status report; wherein, a timer T1 and a time threshold value T2 are arranged when a verification mode radio link control entity of a receiving end detects a loss of a protocol data unit from a radio link control layer. No new timer is arranged when the loss of the protocol data unit (PDU) from a new radio link control layer is detected before the time value. The verification mode radio link control entity triggers a status report without receiving the lost protocol data unit from the radio link control layer when the timer T1 expires. The time threshold value T2 can be equal to the time length of the timer T1. The utility model has the advantages of effectively reducing the quantity of timers needed for the receiving end AMRLC entity ARQ to trigger the status report, message quantity and data size of passage packets needed to feed back the status report, and improving the wireless resource utilization and the system performance.

Description

technical field [0001] The invention relates to the technical field of digital mobile communication, in particular to a status report triggering method of an acknowledgment mode radio link control AM RLC entity automatic retransmission request ARQ in a wireless communication system. Background technique [0002] Acknowledgment Mode Radio Link Control AM RLC Entity Automatic Repeat Request ARQ Receiver Response Status Reporting Mechanisms of the Third Generation Mobile Communication System are: Periodicity, Radio Link Control Layer Protocol Data Unit (RLC PDU) Loss Detection, Received and Transmitted There are three trigger methods for polling messages on the terminal in turn. The status report contains confirmation message ACK or non-confirmation message NACK, and the data packet format has three types: bitmap (BITMAP), list (LIST), and relative list (RLIST). There are two mechanisms to reduce the frequency of status reports: prohibiting round-robin detection and prohibitin...

AI Technical Summary

Problems solved by technology

[0005] The disadvantage of this solution is that a timer needs to be set for each RLC PDU corresponding to the SN at the gap, and a status report will be fed back after the timer expires. Multiple messages occupy more wireless resources and are not efficient.

HARQ uses multiple parallel processes. Generally, when the wireless link is in poor condition or handover scenarios, retransmission of multiple HARQ processes may fail, so that when the AM RLC entity at the receiving end receives the RLC PDU, it may receive the RLC PDU within a short period of time. Several continuous or discontinuous gaps are detected

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