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为提高机会协同通信系统的中继选择公平性,提出了以不影响系统中断性能为目标的协同方案。在建立了协同通信系统模型的基础上,提出机会协同方案,并引入比例公平算法对机会协同方案进行改进;分别对2种方案下的中继选择概率与系统中断概率进行了分析,根据定义的公平因子表征中继公平性与理想公平上限。仿真结果表明,提出的基于比例公平的机会协同方案,显著改善了中继选择的公平性,在大信噪比条件下趋近理想公平上限,同时保持了系统中断性能。
In order to improve the fairness of relay selection in opportunistic cooperative communication system, a collaborative scheme with the goal of not influencing system interrupt performance is proposed. Based on the establishment of a collaborative communication system model, the opportunistic cooperation scheme is proposed and the proportional fairness algorithm is introduced to improve the opportunistic cooperation scheme. The probability of relay selection and the probability of system outage under two schemes are analyzed respectively. According to the definition The fairness factor characterizes the fairness of fairness of relay and the fair ceiling of ideal. The simulation results show that the proposed scheme based on proportional fairness can significantly improve the fairness of relay selection and approach the ideal fair ceiling under the condition of large signal-to-noise ratio, while maintaining the system interrupt performance.