Total optimisation of a media-streaming wireless terminal: Energy-efficient link adaptation 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 45th Annual Conference on Information Sciences and Systems (CISS), 2011
,
p.
6
, Baltimore, MD, USA
Year: 2011
On page(s):6
ISBN: 978-1-4244-9846-8
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 a (delay-sensitive) media streaming application (e.g. music, or video), which introduces yet another degree of freedom: the number of bits allocated to a second of the media signal (encoding rate). We consider any arbitrary combination of link-layer parameters, with the only restriction that the corresponding packet-success rate function (PSRF) is an S-curve. Under a very general optimisation criteria, we obtain a robust result for a media-streaming terminal with an adjustable symbol rate: the key is a tangent line from (0, 0) to a scaled graph of the PSRF, the steeper the line (greater slope) the better the configuration. Under additional reasonable assumptions, at the optimum, both throughput per unit SNR and fidelity per unit rate are maximal, which is intuitively appealing.
Author Keywords
Download
Bibtex
@INPROCEEDINGS{Vi_CiSS11
AUTHOR = {Rodriguez,V.} ,
TITLE = {Total optimisation of a media-streaming wireless terminal: Energy-efficient link adaptation under higher-layer criteria } ,
YEAR = {2011} ,
MONTH = {Mar} ,
PAGES = {6},
ADDRESS = {Baltimore, MD, USA},
BOOKTITLE = {Proceedings of 45th Annual Conference on Information Sciences and Systems (CISS), 2011},
AFFILIATION = {Chair of Communication Networks (ComNets), Faculty 6, RWTH Aachen University},
ISBN = {978-1-4244-9846-8 },
ANNOTE = {PSRF; bit error constraint; data traffic; delay-sensitive media streaming application; delay-tolerant traffic; encoding rate;energy-efficient link adaptation;error detection;higher-layer criteria;link optimisation;link-layer parameters; media streaming wireless terminal; modulation order;packet size; packet-oriented criterion; packet-success rate function; selective packet retransmission mechanism; spectral efficiency maximization; symbol rate; wireless communication system; media streaming; optimisation;radiocommunication; telecommunication terminals;},
URL = {https://www.comnets.rwth-aachen.de}