Relay transmission system and method capable of adaptively selecting relay schemes

Abstract

The invention discloses a relay transmission system and a relay transmission method capable of adaptively selecting relay schemes, and belongs to the technical field of wireless communication. The system comprises three pieces of radio equipment. Each piece of radio equipment consists of a universal software radio peripheral (USRP) and a computer. The three pieces of radio equipment are used as three nodes, two nodes are source nodes, the other node is used as a relay node, and the source nodes perform relay communication through the relay node. The relay node can adaptively select a network encoding-free two-way relay transmission mode or an inter-stream network encoding two-way relay transmission mode. A plurality of relay modes suitable for a software radio platform is created, a plurality of relay transmission schemes are implemented on the software radio platform, and three types of services of data transmission, file transmission and video transmission can be supported. Throughput can be improved; and by the software radio platform, experimental data can be acquired and analyzed under an office condition.

Description

Technical field [0001] The invention belongs to the field of wireless communication technology, and specifically relates to a relay transmission system and method for adaptively selecting a relay scheme. Background technique [0002] In wireless communication, as the communication distance increases, the attenuation of wireless signals becomes more severe, which makes long-distance point-to-point direct communication unrealistic. In order to solve this problem, even if two nodes that are far apart can complete data transmission and exchange with each other, one or a series of nodes that can directly communicate with the two nodes can be found between the two nodes. Auxiliary communication, this communication method is called wireless relay. Wireless relay transmission has many advantages, which can expand the coverage of wireless networks, realize long-distance reliable communication, save wiring, reduce costs, etc. It has been widely used in mobile communications, wireless loca...

AI Technical Summary

Problems solved by technology

[0006] At present, relevant research at home and abroad is only carried out on a single relay method, such as only on the traditional relay method or only on the network coding method, and does not consider the traditional relay method and the network coding method jointly.

In addition, existing relay devices on the market only support traditional relay methods and do not support network coding methods, and no one uses related devices to simultaneously support multiple relay methods for adaptive selection.

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