Abstract:

In multi-source and multi-destination wireless networks, the source-destination pairs may choose the same node as the best relay for cooperative transmission by the best relay cooperative technology, which leads to the best relay collision problem and severely affects the cooperative performance of systems. In order to solve this problem, two low conflict relay selection methods are proposed and extended to the power distribution situation. Meanwhile, a distributed method with power distribution is also proposed. Simulation results show that, compare to previous methods, the proposed methods can reduce conflict significantly and improve the system performance with the diversity gain unchanged. Furthermore, in comparison with the optimal algorithm, the proposed methods have lower complexity with the nearly same performance.