一种实用的变型选择重传ARQ方式及其实现方案

本文针对往返传播延迟时间长且数据持输速率高的通信系统,如卫星通信系统,提出了一种变型的选择重传ARQ方案。此方案将选择重传方式与有限的收、发缓存容量结合成一体,从而减少了收、发端所需的缓存容量,减小了给每一帧编号所需的帧序号范围。因此,用Z80 CPU及其接口芯片就很容易实现这一方案,文中给出了实现方案的原理示意图。

An Effective Variation of Selective-Repeat ARQ Mode and Its Implementation Scheme

In this paper, in view of the communication systems with large round-trip delay and hlgh data rate, such as satellite communication systems,a variation of the selectivre-repeat ARQ scheme is described. This variation incorporates a selectiverepeat mode with finite receiver and transmitter buffer, and hence reduces the buffer size needed at the reciever and transmitter as well as the sequence number range needed to number each frame. Therefore, it is easy to implement this scheme by using 280 CPU and its interfaces.