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Network coding transmission method

A technology of network coding and transmission method, applied in the field of wireless collaborative communication, can solve the problems of low resource utilization rate and traversal capacity, low network transmission efficiency, large space-time resource overhead, etc., so as to improve capacity and diversity performance, and solve the problem of resource utilization. rate reduction, improved throughput and robustness

Active Publication Date: 2011-03-30
COMBA TELECOM SYST CHINA LTD
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Problems solved by technology

[0006]The transmission scheme in the prior art requires at least 2M time slots to complete the information interaction between M pairs of user nodes, the resource utilization rate and traversal capacity of the system are low, and the empty When the resource overhead is large, resulting in low network transmission efficiency

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Embodiment Construction

[0018] In order to further solve the problem of resource utilization reduction caused by traditional relay and forwarding, multiple user-pair interaction information can be simultaneously transmitted in the same time slot. However, in the multi-user pair scenario, different user pair interaction information interferes with each other, resulting in the user node being unable to decode the network coded information sent by the relay station. In order to suppress mutual interference between different users on the interaction information, an interference alignment (Interference Alignment) technology may be introduced in the network coding operation of the relay station.

[0019] Specifically, the relay station performs network coding processing on the user-pair interaction information based on interference arrangement, so that different user-pair interaction information is projected onto different vector directions in the signal space, thereby realizing the arrangement of different...

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Abstract

The invention discloses a network coding transmission method applied to a multi-user-pair two-way relay communication system. The method comprises the following steps that: a relay station receives the user sending information of a user node to which multiple user pairs belong to obtain relay receiving information; the relay station obtains multiple network coding information corresponding to different user pairs according to the user pairing condition by utilizing instant channel status information and the relay receiving information; and the relay station superimposes multiple network coding information corresponding to different user pairs to obtain relay forwarding information and broadcasts the relay forwarding information to the user node. Through adopting the network coding transmission method based on interference arrangement in a wireless relay network, the user sending information of the user node to which the multiple user pairs belong can be simultaneously transmitted, andthe user sending information of the user node to which the multiple user pairs belong is projected to the vector direction with different signal spaces, thereby eliminating the interference among theuser pairs and improving the transmission efficiency of a two-way synergetic relay network.

Description

technical field [0001] The present invention relates to the technical field of wireless cooperative communication, in particular to a network coding transmission method. Background technique [0002] The next-generation broadband cellular mobile communication system uses wireless relay technology to expand the coverage of the system and provide additional space diversity gain to improve the transmission rate and the spectral efficiency of the system. As an advanced wireless transmission mode, the cooperative relay technology can not only expand the coverage, enhance the wireless transmission performance, but also improve the spectral efficiency of wireless transmission by jointly processing the received multi-channel information. , the cooperative relay network can effectively improve the performance of the system. [0003] In the traditional mode, the relay station only simply stores and forwards the received information; the frame structure schematic diagram of the corres...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04L25/03H04B7/14
Inventor 彭木根赵中原谢信乾蔡雯琦仝海威王文博
Owner COMBA TELECOM SYST CHINA LTD
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