A Hybrid ARQ Protocol with a Multi-Copy Retransmission Scheme for Real-Time ATM Services in Broadband Radio Access Networks

Chang Wook AHN
Chung Gu KANG
Chul Hee KANG
Woo Shik KANG

IEICE TRANSACTIONS on Communications   Vol.E84-B    No.10    pp.2797-2804
Publication Date: 2001/10/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Terrestrial Radio Communications
hybrid ARQ,  channel-adaptive FEC,  multi-copy retransmission,  real-time ATM services,  

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In this paper, we propose a new type of hybrid ARQ protocol, in which a channel-adaptive variable rate channel coding scheme is combined with a multi-copy retransmission strategy so as to enhance the system performance under the delay constraint of real-time ATM services in broadband radio access networks. The main feature of a multi-copy retransmission strategy in this scheme is to improve the average throughput for a given Forward Error Correction (FEC) rate, subject to the prescribed cell loss requirement of the real-time wireless ATM services, while augmenting the reliability of channel state information required for a channel-adaptive FEC scheme. Our analysis shows that under a harsh fading channel, the proposed approach is useful for achieving the prescribed cell loss performance without significantly degrading the average throughput performance.