针对混合应用业务的ARQ改进方案

在高速无线通信中,自动请求重传(ARQ)是链路层不可缺少的技术,它通过重传向上层屏蔽无线链路上包的丢失。随着无线网络的发展,无线传输速率不断提高,应用的业务类型也越来越广泛。目前,众多ARQ技术的研究都集中在如何提高该技术的确认效率,以适应更高的传输速率,但鲜有研究着手于如何使ARQ能够更好地应用于混合业务环境。针对混合业务环境下的ARQ改进提出了2种方案,并给出其中1种在实际应用中的改善效果。

Improved ARQ schems in multi-application environments

In the high rate wireless communication system,automatic repeat request(ARQ)technology is indispensable in link layer,which shields the packet loss of the wireless channel from the upper level.With the development of wireless communication system,the transmission rate gets higher and higher,applications become more and more diversified.Presently,almost all the studies about ARQ technology concentrate on improvements of its efficiency in ACK mechanism,few concerns its accommodation with multi-application environment.This article suggests 2 methods to improve the ARQ technology in multi-application environment,and presents the performance of one that has already been put in use.