LANGUAGE
English
SOURCE
Proc. APCC'2001, Sept. 2001, Tokyo, Japan.
Published Date:2001-09-16
ABSTRACT
In this paper, we study the efficiency-reliability tradeoff issue of hybrid ARQ (HARQ) scheme in noisy long delay network such as satellite-terrestrial hybrid network, where both long wireless round trip time and time-varying error characteristics have to be considered. A new adaptive HARQ scheme is proposed to acquire efficiency-reliability joint optimization. By adjusting coding rate according to estimation of average transmission number for a successful transfer, our proposal can limit retransmission times with less efficiency loss. As a result, the persistence time of a packet in buffer led by retransmission is strictly limited and buffer utilization increases. Simulation shows the great performance improvement by using our proposed adaptive HARQ scheme.
KEYWORDS
hybrid ARQ, network, QoS
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