Downlink hybrid automatic retransmission method, system and apparatus

Abstract

The invention discloses a method of down mixing self-retransmission, which comprises: a relay station (RS) and a mobile station (MS) respectively receive down data subframes which are sent to the MS by a base station (BS), and respectively return respective response showing the right receiving or response showing the wrong receiving to the BS; if the RS right receives the down data subframes, the RS buffers the down data subframes; if the up response of the BS returned by the MS is the response showing the right receiving, the RS releases the down data subframes buffered by the RS. The invention also discloses a system of down mixing self-retransmission and a RS. After the RS and the MS right receive the down data subframes sent by the MS by using the invention, the RS can fast and accurately release the data subframes buffered by the RS, and the capacity and the performance of the RS are improved.

Description

technical field [0001] The present invention relates to communication technology, in particular to a downlink hybrid automatic retransmission method, system and device. Background technique [0002] In a traditional cellular network, the wireless connection between a base station (BS, Base Station) and a mobile station (MS, MobileStation) is a direct wireless connection, that is, the concept of "single hop" is adopted. However, in the planning stage of base station coverage, it is usually difficult to avoid terrain and ground objects that may cause shadow fading effects in some areas of the signal. Therefore, it is necessary to use a relay system to improve signal coverage. A relay station (RS, Relay Station) first receives a signal sent from a base station / user terminal, and then forwards the signal to the user terminal / base station. Appropriate placement of RS can improve signal coverage, and at the same time, signal regeneration can be achieved when relaying and retransm...

AI Technical Summary

Problems solved by technology

[0028] It can be seen that in the existing downlink hybrid automatic retransmission method, when the RS receives the data correctly and caches the data, no matter whether the MS receives it correctly or receives it incorrectly, there is no mechanism to notify the RS, that is, for both cases 3 and 4, it will As a result, the data subframes cached in the RS cannot be released, and the data cached in the RS cannot be released in time, which directly affects the capacity and performance of the RS.

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