Status report method of automatic retransfer request

Abstract

The invention discloses a kind of state report method of sender retransmits demand automatically, firstly sliding window of sender retransmits demand automatically is set ''maximum unacknowledged window threshold''; the ARQ noumenon sends ARQ PDU data pack to HARQ noumenon; the HARQ noumenon receives PDU from ARQ noumenon, and cascade or cascaded processed based on the instantaneous channel condition, sends HARQ PDU to receiver; the ARQ noumenon executes the window sliding operation based on the received message, and detects current unacknowledged window value; when it detects that it exceed the preset ''maximum unacknowledged window threshold'', it sends the ''demand state report message'' to the HARQ noumenon; the HARQ noumenon judges if the received message is ''demand state report message'' sent by the ARQ noumenon, the current saved accept confirmation message to the ARQ noumenon. The invention decreases time delay and increases the integral performance of system.

Description

technical field [0001] The invention relates to the technical field of digital mobile communication, in particular to a processing method for an automatic repeat request (ARQ) in a third-generation mobile communication long-term evolution system. Background technique [0002] The user plane of the third-generation mobile communication long-term evolution system uses a combination of upper-layer automatic repeat request (ARQ) and lower-layer hybrid automatic repeat request (HARQ) to achieve reliable transmission. The HARQ entity (entity) is located at the physical layer and the medium access control layer (MAC) of the base station, and the ARQ entity is located at the MAC layer of the base station. The upper-layer ARQ adopts the sliding window mechanism, and the lower-layer HARQ adopts N-channel stop and other protocols. [0003] For the ARQ status report mechanism, there have been suggestions for improvement as follows: when the HARQ at the sending end receives a NACK (not ...

AI Technical Summary

Problems solved by technology

If there are many frames waiting for a response in the ARQ window, and the timing for HARQ to deliver ACK to the upper layer has not yet arrived, the sliding speed of the window will slow down, and even the sliding window method will evolve into a stop-and-wait method, which reduces the efficiency of ARQ.

At the same time, due to the delay in sending new PDUs from ARQ to the HARQ layer, the efficiency of HARQ is reduced, resulting in a bad cycle, which reduces the overall performance of the system

[0006] On the other hand, the frequency of ACK controlled by HARQ may not meet the requirements of ARQ scheduling. For example, ARQ needs the status report of Group A PDU, and HARQ feeds back the status report of Group B PDU after the timing period arrives, which is what ARQ needs. The status report of some PDUs may have to wait until the next reporting cycle, which will also cause some PDUs in the ARQ window to fail to respond in time

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