Cross-Layer combining of adaptive Modulation and coding with truncated ARQ over wireless links

We developed a cross-layer design which combines adaptive modulation and coding at the physical layer with a truncated automatic repeat request protocol at the data link layer, in order to maximize spectral efficiency under prescribed delay and error performance constraints. We derive the achieved s...

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Bibliographic Details
Published in:IEEE transactions on wireless communications Vol. 3; no. 5; pp. 1746 - 1755
Main Authors: Qingwen Liu, Shengli Zhou, Giannakis, G.B.
Format: Journal Article
Language:English
Published: New York IEEE 01.09.2004
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:
Automatic repeat request
Channels
Coding
Cross layer design
Data links
Delay
Error correction
Errors
Fading
Gain
Modulation
Modulation coding
Physical layer
Quality of service
Spectra
Throughput
Wireless communication
ISSN:1536-1276, 1558-2248
Online Access:Get full text
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Summary:We developed a cross-layer design which combines adaptive modulation and coding at the physical layer with a truncated automatic repeat request protocol at the data link layer, in order to maximize spectral efficiency under prescribed delay and error performance constraints. We derive the achieved spectral efficiency in closed-form for transmissions over Nakagami-m block fading channels. Numerical results reveal that retransmissions at the data link layer relieve stringent error control requirements at the physical layer, and thereby enable considerable spectral efficiency gain. This gain is comparable with that offered by diversity, provided that the maximum number of transmissions per packet equals the diversity order. Diminishing returns on spectral efficiency, that result when increasing the maximum number of retransmissions, suggest that a small number of retransmissions offers a desirable delay-throughput tradeoff, in practice.
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ISSN:1536-1276
1558-2248
DOI:10.1109/TWC.2004.833474