摘要
为了解决现有中继节点选取方法中,以信道状态信息作为中继节点的选取标准,忽略了节点业务的影响。在此基础上,提出了一种基于节点空闲时间的认知流量中继协作MAC(ITTC-MAC)机制。ITTC-MAC以节点等效数据传输速率作为中继节点的选取标准,建立和维护相关信息,动态选取最优的中继节点参与中继协作通信。NS2仿真结果表明,该机制可以有效提高网络的吞吐量。
In order to resolve the existing methods of relay selection that the source selects the relay according to the channel state information,disregards the node＇s traffic condition.Based on these studies,a based on Idle Time with Traffic Cognitive relay cooperative MAC called ITTC-MAC is proposed.ITTC-MAC selects the relay according to the equivalent transmission time obtained by the relay,establish and maintain the relevant information,and dynamically selects the optimal relay node to participated in relay cooperation communications.Finally,the ITTC-MAC is simulated in NS2,the simulation results show that this mechanism can improve the network throughput effectively.
出处
《计算机工程与设计》
CSCD
北大核心
2012年第9期3386-3390,共5页
Computer Engineering and Design
基金
国家自然科学基金项目(61071118
60702055)
国家教育部新世纪优秀人才支持计划基金项目(NCET-07-0914)
