Transmission method for network data of distributed opportunity relay

Abstract

The invention relates to a network data transmission method for a distributed opportunistic relay, belonging to wireless network transmission technical field. In bidirectional wireless network transmission, a plurality of candidate relay nodes select one relay node to participate in cooperation through distributed selection count; the originating nodes decide whether to adopt the direct transmission mode or the relay transmission mode, which satisfies the quality of service of the system and meanwhile reduces power consumption. The relay nodes judge whether to forward the data and calculate the optimized transmitted power of the data and send the data from a plurality of originating nodes to a plurality of destination nodes at the same time after conducting network coding to the data. The destination nodes receive the data through maximum likelihood method and maximum ratio combining method at the receiver terminals and decode the received information. The network data transmission method can carry out combinatorial optimization to the selection, the network coding and the power splitting of the relay nodes through distributed control mechanism under the condition that only part of the information of the channel status is provided, and can be effectively used in an energy-effective bidirectional-transmission wireless network.

Description

technical field [0001] The invention relates to a distributed opportunistic relay network data transmission method, which belongs to the technical field of wireless network data transmission. Background technique [0002] The goal of next-generation broadband wireless communication is to be able to provide higher transmission rates, higher spectrum utilization, and greater coverage. Relay transmission is a wireless network data that is simple, anti-multipath interference, and effectively improves coverage. transmission technology. In the relay transmission method of the traditional two-way communication system, the two source nodes transmit information to each other with the help of the relay node, which mainly includes the following steps: the first source node sends data to the relay node in the first transmission stage of the network protocol, Then in the second transmission stage the relay node sends the data to the second source node, in the third transmission stage th...

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Problems solved by technology

[0003] However, in this traditional relay transmission method, many transmission stages will inevitably lead to a decrease in spectral efficiency and affect other performances of the system. In addition, when multiple relay nodes participate in data relay transmission, it will inevitably lead to increased coordination overhead. and increased power consumption

[0004] The existing relay transmission method has a centralized resource allocation and scheduling method for the traditional relay transmission method to improve the spectrum efficiency and power efficiency of the communication system, but it needs sufficient information feedback requirements and time delay, etc., so the existing The relay transmission method cannot meet the requirements of high spectral efficiency and energy saving under the condition of only partial channel state information

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