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Adaptive data retransmission method and device

A data and retransmission technology, applied in the direction of error prevention/detection using the return channel, error prevention/detection through diversity reception, etc., which can solve the problem that the reliability of retransmission cannot be guaranteed, the combining level is low, and the coding matrix form is not considered. It is suitable for problems such as the current instantaneous channel state, and achieves the effects of reducing complexity, improving retransmission reliability, and controlling the number of retransmissions.

Active Publication Date: 2013-03-06
大唐联诚信息系统技术有限公司
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Problems solved by technology

[0004] In the process of implementing this application, the inventors found at least the following problems in the prior art: when retransmission occurs, the technical solution of the prior art still uses a fixed coding matrix for the retransmission data and the new transmission data, and does not consider the Whether the encoding matrix form is still suitable for the current instantaneous channel state and cannot guarantee the reliability of retransmission
This kind of merging is a bit-level merging, and the merging level is lower

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  • Adaptive data retransmission method and device
  • Adaptive data retransmission method and device

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Embodiment Construction

[0072] Embodiments of the present application provide a data adaptive retransmission method and device with high reliability and low decoding complexity. In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0073] Firstly, a method for adaptive retransmission of data in this application is described.

[0074] In broadband wireless communication, hierarchical services combine and send data streams...

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Abstract

The invention relates to the technical field of communication, in particular to adaptive data retransmission method and device. The method includes: a data receiver decodes received data and transmits a retransmission request to a base station in case of decoding errors; and after receiving the retransmission request, the base station selects an optimal retransmission coding matrix from a space-time coding matrix set according to optimal retransmission selection rules and respectively transmits the retransmitted data, newly transmitted data and an optimal preprocessing matrix number to relays, and the relays load the retransmitted data and the newly transmitted data transmitted by the base station into the optimal retransmission coding matrix in a distributed manner and forward the data to the data receiver. The method guarantees full diversity, high rate and linear decoding complexity of a retransmitted data stream and also guarantees real-time transmission of another data stream to be insusceptible to retransmission of the data stream, and resource utilization rate is high.

Description

technical field [0001] The present application relates to the technical field of wireless communication, in particular to a data adaptive retransmission method and device. Background technique [0002] In broadband wireless communication, hierarchical services combine and send data streams of different QOS (Quality of Service) levels through overlapping coding, layered modulation and other technologies, and realize simultaneous transfer to save system resources. However, there may be different requirements in terms of performance and time delay for the data streams transmitted in a hierarchical manner. For example, when the two services of telephone VOIP (Voice over Internet Protocol, Internet phone) and data download are classified, VOIP has delay-sensitive characteristics. Retransmission is not supported; data download is more focused on transmission quality, and retransmission is supported to ensure the accuracy of received signals. Therefore, a partial retransmission m...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/06H04L1/16
Inventor 邵兰曹晏波李洪强王鑫
Owner 大唐联诚信息系统技术有限公司
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