Title :
Efficient hybrid ARQ protocols with adaptive forward error correction
Author_Institution :
Dept. of Electr. Eng., British Columbia Univ., Vancouver, BC, Canada
Abstract :
In this paper, efficient stop-and-wait, go-back-N and selective-repeat hybrid ARQ protocols with adaptive forward error correction (AFEC) using convolutional coding are proposed and analyzed. The basic idea is to vary the coding rate for error correction according to system parameters, such as the signal-to-noise ratio, the round trip delay and the buffer size at the receiver, so as to maximize the throughput efficiency. The performances of the proposed ARQ protocols are evaluated for two channel models: a non-fading and an ideally-interleaved Rayleigh-fading additive white Gaussian noise channel. In all cases it is found that the hybrid ARQ protocols with AFEC yield a comparatively high throughput under all channel conditions
Keywords :
convolutional codes; encoding; error correction codes; fading; protocols; random noise; telecommunication channels; white noise; AWGN; adaptive forward error correction; additive white Gaussian noise channel; buffer size; channel models; coding rate; convolutional coding; go-back-N protocol; hybrid ARQ protocols; ideally-interleaved Rayleigh-fading channel; nonfading channel; performance; receiver; round trip delay; selective-repeat hybrid protocol; signal-to-noise ratio; stop-and-wait protocol; system parameters; throughput efficiency; Automatic repeat request; Convolution; Convolutional codes; Delay; Error correction codes; Forward error correction; Performance evaluation; Protocols; Signal to noise ratio; Throughput;
Journal_Title :
Communications, IEEE Transactions on
DOI :
10.1109/TCOMM.1994.577031
