Generalised link-layer adaptation with costly power under higher-layer criteria
Author(s): Rodriguez,V.
Chair of Communication Networks (ComNets), Faculty 6, RWTH Aachen University
Contact: publications@comnets.rwth-aachen.de
In Proceedings of 34th IEEE Sarnoff Symposium, 2011
,
p.
5
, Princeton, NJ, USA
Year: 2011
On page(s):5
ISBN: 978-1-61284-681-1
Abstract It has long been recognised that a wireless communication system can be more efficient if link-layer parameters such as modulation order, symbol rate and packet size, are (adaptively) optimised. A common optimising criterion is to maximise spectral efficiency (bits per second per Hertz (bps/Hertz)) subject to a very low bit-error constraint. But a packet-oriented criterion for link adaptation seems more appropriate for practical communication networks fitted with strong error detection and a selective packet re-transmission mechanism. In recent work, we performed link optimisation for maximal bits per second or bits per Joule for data (delay-tolerant) traffic. In the present work, we extend our previous analysis to consider the case of costly power. The cost can be interpreted in the common economic sense, or can be a signal to encourage efficient resource use in a decentralised matter; furthermore, it may simply be a Lagrange multiplier in a centralised optimisation. When the symbol rate is flexible, the result under pricing is similar to the costless scenario: a set of possible link configurations can be ranked by the slope of a tangent line from the origin to the graph of a scaled version of the PSRF: the steeper the tangent the better the configuration. However, if the effective price - the power price divided by the noise-normalised channel gain - is sufficiently high, it is optimal for the terminal not to operate. If the symbol rate is fixed, the optimal configuration depends on the effective price.
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@INPROCEEDINGS{Vi_SaS11
AUTHOR = {Rodriguez,V.} ,
TITLE = {Generalised link-layer adaptation with costly power under higher-layer criteria } ,
YEAR = {2011} ,
MONTH = {May} ,
PAGES = {5},
ADDRESS = {Princeton, NJ, USA},
BOOKTITLE = {Proceedings of 34th IEEE Sarnoff Symposium, 2011 },
AFFILIATION = {Chair of Communication Networks (ComNets), Faculty 6, RWTH Aachen University},
ISBN = {978-1-61284-681-1 },
ANNOTE = {Lagrange multiplier; PSRF; bit-error constraint; centralised optimisation;cost power; data traffic; error detection;generalised link-layer adaptation; higher-layer criteria;packet-oriented criterion; selective packet re-transmission mechanism; wireless communication system; error detection; error statistics; optimisation; radiocommunication; telecommunication traffic;},
URL = {https://www.comnets.rwth-aachen.de}