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

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.