中文摘要：

针对移动中继（MR）协助下终端直通（D2D）链路与传统蜂窝链路之间的同频干扰问题,在MR是、否可被多条D2D链路复用的条件下,分别提出了2种联合模式选择和资源分配减小系统干扰的方案。在MR可被多条D2D链路复用的方案（方案1）中,通过干扰模型构建的优化问题等价于二分图中的最大匹配问题,继而可以借助匈牙利算法在多项式时间内得到最优解;在MR不可被多条D2D链路复用方案（方案2）中,通过干扰模型构建的优化问题等价于三维匹配问题,一般意义下属于NP-hard难题,因此设计了一种具有多项式复杂度的方案。仿真结果表明,方案1可得到理论最优解,其D2D链路总中断概率比贪婪方案降低了29.94%;方案2的D2D链路总中断概率比贪婪方案降低了23.67%,相比于最优值,仅仅损失了8.16%的性能,有效地实现了性能与复杂度之间的折中。

英文摘要：

The joint allocation of transmission mode and resource is considered, and two mechanisms are proposed to address the problem of the severe mutual interference between mobile relay （MR） assisted device-to-device （D2D） communication and the existing cellular communication whether each MR can be reused by multiple D2D links. The problem model of interference is reduced into a bipartite matching problem in mechanism 1 when each MR can be reused by multiple D2D links, and the optimal solution of the problem is obtained in polynomial- time by using Hungary algorithm. The problem model of interference turns out to be a three- dimensional matching problem in mechanism 2 when each MR cannot be reused by multiple D2D links. The problem generally is NP-hard, and a heuristic algorithm is proposed to get its approximate optimum in polynomial-time. The results show that the proposed mechanism 1 maintains the optimal performance and outweighs the greedy scheme by 29.94 %, and mechanism 2 achieves a 23.67% gain compared with the greedy scheme, and that a comparison with the optimal algorithm shows the proposed schemes attain polynomial-time complexity with only 8. 16% performance loss.