Method for selecting safe relay for multiple targets in mobile collaborative network

Abstract

The invention relates to the technical field of mobile communications and provides a method for selecting a safe relay for multiple targets in a mobile collaborative network. In the method provided by the invention, a channel fading threshold as well as and the various states and the state transition probability of candidate relay nodes are determined through periodically transmitting a training sequence and feedback information; when the fading speed of some channel is greater than the threshold, dynamic relay selection is carried out, or else, semi-static relay selection is carried out; and during the process of relay selection, the optimal safe relay is selected to collaborate data transmission according to the total compensation determined by a plurality of target values, such as system safety capacity, and the like. With the adoption of the method provided by the invention, the characteristics of wireless channels in the mobile collaborative network can be accurately and timely described, and the dynamic selection of the optimal safe relay for the multiple targets is realized through lower complexity, so that the method has strong flexibility and expandability; and the transmission efficiency is further increased through carrying out different relay selections according to channel states.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a multi-target safe relay selection method in a mobile cooperative network. Background technique [0002] With the continuous enrichment of communication content and the continuous growth of business volume, mobility and broadband have become the two mainstream development trends in the current communication field. The existing wireless communication spectrum resources are very limited. If the spectrum utilization rate is not effectively improved, it cannot meet the growing communication needs. The multiple-input multiple-output (Multiple-Input Multiple-Output, MIMO) technology can effectively solve this problem. The channel capacity of the MIMO system can increase linearly with the increase of the number of antennas, which has high spectral efficiency, and can also obtain higher throughput and reliability without increasing additional overhead such as spectrum and power. Ho...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the shortcomings of the prior art, the present invention proposes a method for selecting a multi-target secure relay in a mobile cooperative network in order to solve the problem that the optimal relay and the secure relay are not comprehensively considered in the cooperative relay network in the prior art, An optimal security relay is selected for the transmission of data frames, thus improving transmission security while ensuring transmission efficiency

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