WiMAX中基于跳数和信道感知的自适应差错控制机制  

Adaptive Error Control Protocol Based on Hops and Channel Awareness in WiMAX Networks

作　　者：靳勇[1] 白光伟[2] 李明杰[1] 阮鹏[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,南京211816

出　　处：《计算机测量与控制》2013年第8期2234-2237,共4页Computer Measurement &Control

基　　金：国家自然科学基金资助项目(61073197);江苏省科技支撑计划项目(BE2011186)

摘　　要：针对在WiMAX网络中系统资源有限的条件下,如何提高资源利用率同时提供服务质量需求保障等问题,提出了基于跳数与信道质量感知的自适应差错控制机制;根据基于IEEE 802.16e的传统ARQ机制,综合考虑了影响无线数据传输的跳数和信道质量等因素建立了感知分析模型,在此基础上得出QoS随ARQ与HARQ的变化规律,从而根据跳数和信道感知的门限值确定最佳差错控制方案;数学分析和仿真实验表明,所提策略在系统吞吐量、实时性和可靠性等方面,表现出了比传统ARQ和HARQ更优越的性能。Under the circumstances of limited resource in WiMAX, efficient error control protocol to meet QoS requirements and maxi- mize resource utilization become crucial. Therefore, the adaptive error control protocol based on hops and channel aware was proposed. Ac- cording to principle of conventional ARQ in IEEE 802. 16e, the mathematical analyses model was provided, which is used to research the in- fluence of data transmission in wireless communication system. An adaptive error control protocol was established based on the awareness model, which is able to selecting the best error control protocol based on the thresholds of hops and channel condition adaptively and guaran- tee the diversity of the quality of service. The mathematical analyses and simulation results show that the proposed mechanism could perform better in terms of system throughput, real time performance and reliability, compared to the conventional ARQ alone and hybrid ARQ alone.

关 键 词：WIMAX网络 IEEE 802 16e协议 信道感知 自动请求重传 服务质量保障 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]