摘要： 在分析WCDMA的无线链路控制(RLC)层的自动请求重传(ARQ)的实现机制的基础上,综合考虑RLC队列长度、TCP分组到达强度、无线网络纠错强度以及TCP发送端的应用时延要求等因素,提出了基于模糊逻辑控制的自适应的重传纠错次数和主动队列管理策略。仿真结果表明,该策略能够有效提高TCP通过无线网络的吞吐量,高效地利用无线资源。

关键词: 移动通信系统, 自动请求重传, 无线链路

Abstract: A new radio link control strategy based on fuzzy logic to improve transport control protocol (TCP) throughput in WCDMA wireless network is proposed. In which the fuzzy controller consider the RLC queue length, TCP packets arrive rate and the change of the RLC queue to increase or decrease the retransmission number of RLC protocol data units (PDUs) and to drop the newly arrived TCP packets or not. This strategy is simple and easy to implement. The simulation results show it can improve the throughout of TCP in wireless network and improve the utilization of radio resource.

中图分类号: 

• TN929.5