基于复杂信道服务模型的高效可靠链路控制方法

The Efficient and Reliable Link Control Method basing Complex Channel Service Model

摘要:

面向无线通信网络化应用发展趋势，针对无线链路容错概率高、实时变化大、信道带宽窄导致链路可靠控制难的问题，提出了基于复杂信道服务模型的高效可靠链路控制方法；分析了无线传播复杂信道服务模型的多种特点，提出了基于无线信道服务模型紧密耦合高效适配的控制机制，设计了无线链路层自适应分组反馈控制流程，结合帧结构设计给出了数据分组长度、最大重数次数等关键参数演算方法；在物理层最小分组长度对应传输成功率85%至99%条件下，仿真给出最佳分组长度为最小分组的2倍至9倍，最大重数次数为9次缩减至4次；仿真验证表明：在业务数据包长度为最小分组长度的10倍～100倍时，相比无链路控制状态，传输成功率由1%～90%改进至99.99%以上，平均吞吐量可提升两倍以上。

Abstract:

Towards the development trend of wireless communication networking, regarding the link control difficultiesof in wireless channel with high error probability,real changing and narrow-bandwidt, the efficient and reliable link control method basing complex channel service model is proposed.Firstly,the characteristic of wireless channel service model is analysed. Secondly,the tightly coupled and efficient adaptive control mechanism basing wireless channel service model is proposed,and the adaptive feedback control process in wireless link is designed.Then,the algorithm for grouplength and maximum number of retransmissions are given with the frame structure.Simulation shows that,under the transmission success rate is 85% to 99% with minimum grouplength,the best data group length is 2 to 9 times the minimum grouplength ,and the maximum number of retransmissions is from 9 down to 4. The simulation shows that when the packet is 10 to 100 times the minimum grouplength,compared to no link control status,the transmission success rate is upgraded from 1%～90% to over 99.99%,and the average effective throughput obtain more than twice the improvement.