Channel-Grouping Methods on Go-Back-N ARQ Scheme in Multiple-Parallel-Channel System

Chun-Xiang CHEN  Masaharu KOMATSU  Kozo KINOSHITA  

Publication
IEICE TRANSACTIONS on Communications   Vol.E77-B   No.2   pp.265-269
Publication Date: 1994/02/25
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Communication Theory
Keyword: 
channel-grouping methods,  throughput,  ARQ scheme,  multiple-channel system,  

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Summary: 
We consider a communication system in which a transmitter is connected to a receiver through parallel channels, and the Go-Back-N ARQ scheme is used to handle transmission errors. A packet error on one channel results in retransmission of packets assigned to other channels under the Go-Back-N ARQ scheme. Therefore, the channel-grouping (a grouped-channel is used to transmit the same packet at a time), would affect the throughput performance. We analyze the throughput performance, and give a tree-algorithm to efficiently search for the optimal channel-grouping which makes the throughput to become maximum. Numerical results show that the throughput is largely improved by using the optimal channel-grouping.