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Bidirectional cooperative access method based on adaptive multiple decoding

An access method and self-adaptive technology, applied in the direction of transmission modification based on link quality, adjustment of transmission mode, use of forward error control, etc., can solve problems such as collisions

Active Publication Date: 2018-07-06
CHONGQING UNIV OF POSTS & TELECOMM
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  • Claims
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Problems solved by technology

Including the new mechanism of "coding compensation", the new mechanism of "coordinating node selection based on the number of packets sending busy tone", and the new mechanism of "adaptive multiple decoding", the new access method proposed by the present invention can make the selected coordinating node The own data and the received data are encoded, thereby increasing the chance of encoding, avoiding the collision of candidate cooperative nodes due to hidden terminals, and improving the decoding success rate of the destination node

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  • Bidirectional cooperative access method based on adaptive multiple decoding
  • Bidirectional cooperative access method based on adaptive multiple decoding
  • Bidirectional cooperative access method based on adaptive multiple decoding

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Experimental program
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Embodiment approach

[0071] A specific implementation is as follows:

[0072] (1) Implementation conditions

[0073] A network scenario in which several pairs of source and destination nodes are constructed, and there are several candidate assistant nodes between the source and destination nodes. Communication between nodes uses a wireless single-hop network form. Each node can know its own location information (for example, with the help of GPS system), each node knows its neighbor nodes, and service data is transmitted between nodes.

[0074] (2) Implementation method

[0075] The implementation is divided into two parts: "network coding cooperative transmission and processing" and "network coding and decoding methods". The operations of the two are continuously carried out during the network runtime, and there is an interleaving in time sequence. The flow chart of the overall operation of the process As shown in the attached picture.

[0076] 1. Network coding collaborative transmission and...

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Abstract

The invention provides a bidirectional cooperative access method based on adaptive multiple decoding, and comprises two parts including "network coding cooperative transmission and processing" and "network coding and decoding mode" during operation. Three new mechanisms including "coding compensation", "cooperative node selection for sending busy tone based on the number of packets" and "adaptivemultiple decoding" are adopted. The first and second new mechanisms work in the "network coding cooperative transmission and processing" part, and the third new mechanism works in the "network codingand decoding mode" part. The three new mechanisms are used, the new access method provided by the invention can enable a selected cooperative node to carry out coding operation on the own data and thereceived data, so that the coding opportunity is improved, a problem of collision caused by the hidden terminal of a candidate cooperative node is avoided, and the decoding success rate of a destination node can be improved. Therefore, the network coding technology is fully used on the whole, so that the end-to-end average time delay of a data frame is reduced, and a purpose of increasing the network throughput is achieved.

Description

technical field [0001] The present invention belongs to the technical field of wireless communication, and in particular relates to a scenario where data exchange between a source node and a destination node in a wireless network requires cooperation of cooperative nodes, and more specifically relates to a two-way cooperative access method based on adaptive multiple decoding. Background technique [0002] With the continuous increase of the number of wireless communication users, its communication services are also constantly enriched. In order to meet people's needs for communication services, wireless communication networks need to provide better service quality to ensure better transmission performance. However, the bandwidth resources of wireless communication are limited, and the fading of the wireless channel will cause the receiving end to receive damaged data packets. In this context, cooperative diversity can effectively solve the above problems, so cooperative comm...

Claims

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Application Information

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IPC IPC(8): H04L1/00H04L1/06
CPCH04L1/0008H04L1/0077H04L1/0637
Inventor 姚玉坤李小勇刘江兵张云霞吕昱辉
Owner CHONGQING UNIV OF POSTS & TELECOMM
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