基于放大前传的跨层中继选择策略研究

Research on the Strategy of Relay Selection Based on AF by Cross-layer

基于放大前传模式,结合跨层协作思想,提出了一种基于MAC层和物理层的跨层中继策略方案。该方案解决了中继协作时机问题;以最小中断概率为目标,给出了如何选择中继节点以及分配发射功率的方法;该方案以跨层设计为基础,中继进行选择时可以依据最新的信道信息,使选择更加有效;拥有具体的发射功率分配方案,从而更有效地利用发射功率,较平均分配功率系统有更好的性能。

Combined with the idea of cross-layer, it proposes a relay strategy based on the MAC layer and the physical layer in amplify and forward model. This solution solves the problem on relay time. Then it gives a method on how to choose a relay and how to allocate the transmission power for the goal of minimizing the outage probability. The solution can make the selection more effective because the design of it based on cross-layer, which can make the selection based on the latest information. Further, the solution has a specific distribution of transmission power, so can use the transmission power more efficiently, and it can aehieve better performance than the system of distributing power.