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

Abstract

The invention relates to the technical field of mobile communication, and proposes a multi-target safe relay selection method in a mobile cooperative network. In the method of the present invention, the channel fading threshold and various states and state transition probabilities of candidate relay nodes are determined by periodically sending training sequences and feedback information; when a certain channel fading speed is greater than the threshold, dynamic relay selection is performed, otherwise Semi-static relay selection; in the relay selection process, the optimal security relay is selected to assist data transmission according to the overall reward determined by multiple target values ​​such as system security capacity. The method of the invention can accurately and timely describe the characteristics of the wireless channel in the mobile cooperative network, and realize the multi-objective dynamic optimal safe relay selection with relatively low complexity, and has strong flexibility and scalability; according to Different relay selection according to the channel state further improves the transmission efficiency.

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...

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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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