基于QoS和距离感知的自适应协作差错控制机制  

An Adaptive Cooperative Error Control Mechanism Based on QoS and Distance Aware

作　　者：靳勇[1] 白光伟[2,3] 常晋义[1] 

机构地区：[1]常熟理工学院计算机科学与工程学院,江苏常熟215500 [2]南京工业大学计算机科学与技术系,南京210009 [3]计算机软件新技术国家重点实验室(南京大学),南京210093

出　　处：《北京邮电大学学报》2013年第2期102-106,共5页Journal of Beijing University of Posts and Telecommunications

基　　金：国家自然科学基金项目(60673185;61073197);江苏省自然科学基金项目(BK2010548);江苏省科技支撑计划(工业)项目(BE2011186);南京大学计算机软件新技术国家重点实验室开放课题(KFKT2010B08)

摘　　要：提出一种基于跨层交互的自适应协作差错控制策略,包括距离感知的中继选择和支持区分服务的服务质量(QoS)保障机制.链路层采用混合自动重传请求(HARQ),物理层采用自动重传请求(ARQ),根据数据包传输特性建立马尔可夫链模型,感知性能进行中继选择;根据应用业务的多样性QoS需求,确定最佳差错控制方案.仿真实验和数学分析结果表明,所提策略与传统ARQ和HARQ、协作ARQ和HARQ相比,在确保无线传感器网络传输高可靠性的同时缩短了时延并获得了较高吞吐率和能量效率.The distance-aware adaptive relay selection and quality of service （QoS） support algorithm are proposed based on performance of wireless communication. The adaptive cooperative error control mecha- nism based on cross-layer of hybrid automatic repeat request and automatic repeat request （HARQ-ARQ） is provided. A Markov chain model is built for analyzing the performance of wireless communication ac- cording to three different states of the data packets. In the mechanism, ARQ is used at the physical layer and hybrid ARQ is used at the data link layer. Cooperative transmission over multiple relays is proposed based on adaptive relay selection according to the performance between the sending sensor and receiving sensor. Analyses and simulation show that, compared to the traditional ARQ, traditional HARQ, cooper- ative ARQ and hybrid ARQ respectively, the proposed mechanism could have a better performance in terms of saturation throughput rate, reliability and energy efficiency.

关 键 词：无线传感器网络 协作通信 跨层设计 距离感知 自动请求重传 服务质量保障 

分 类 号：TN393[电子电信—物理电子学]