为了解决现有中继激励机制中长期回报存在不确定性,以及即时回报导致资源利用效率降低的问题,该文针对协作下行通信系统提出一种复合中继激励机制(CCRI).首先利用链路不平衡产生的瓶颈,将第1跳链路超过第2跳的数据速率部分作为即时回报,用于中继节点自身数据的传输;同时针对即时回报量不足,过量或瓶颈存在于第1跳导致即时回报失效的情况,采用基于比例公平的长期回报作为补充,进一步调整中继节点的调度权重.仿真结果表明,所提机制能够给予中继节点合理的回报,并实现系统频谱效率和生存时间,以及中继能量效率的改善.%In order to overcome the uncertainty of the reward with long-term relay incentive strategy and the degradation of resource utilization efficiency incurred by the short-term incentive scheme, a Cooperative Compound Relay Incentive (CCRI) mechanism is proposed for cooperative downlink communication system. By exploiting the bottleneck resulted from the imbalance of links' capability, the rate difference that the first hop exceeds the second is provided as an instant reward for the relay node's own data transmission. In addition, by taking into account the situations where the short-term reward is insufficient, excessive or the bottleneck exists in the first hop in such a case that the short-term incentive scheme becomes unavailable, a proportional fair based long-term incentive is employed as supplementary, with which the relay node's scheduling weight is further adjusted. Simulation results show that the proposed scheme can provide rational reward to the relay and achieve improvements of system's spectral efficiency and lifetime, as well as relay's energy efficiency.
展开▼
