Enhanced Distributed Channel Access of IEEE 802.11e as Policy for Cognitive Radios
Authors: Berlemann, Lars and Mangold, Stefan and Hiertz, Guido R. and Walke, Bernard
Chair of Communication Networks, Faculty 6, RWTH Aachen University
: Lars Berlemann
In Proceedings of 15th Meeting of the Wireless World Research Forum WWRF15, p. 7, Paris, France, 2005.
Publication Date: Dec, 2005
On page(s):7
ISBN:
Abstract Fundamental changes in the way spectrum is regulated are currently discussed in literature. On the one hand, the employment of more wireless communication systems in the future will continue to request significant amount of additional spectrum. On the other hand, many frequency bands are often under-utilized, because of inefficient spectrum allocations. Adaptive radios, also referred to as cognitive radios, realize the dynamic usage of frequency bands on an opportunistic basis, by identifying and using the under-utilized spectrum. Such spectrum is therefore referred to as spectrum opportunity. To make use of such spectrum opportunities, policies are needed to determine when spectrum is an opportunity, and in addition to determine the constraints of using these opportunities. Policies that assist the dynamic adaptation of medium access control protocols are in the focus of this paper. We discuss a step towards the realization of cognitive radios at the example of the well-known Enhanced Distributed Channel Access of IEEE 802.11e Wireless Local Area Networks. This channel access protocol is here specified in a machine understandable policy language, instead of lengthy textual description. Such a machine-understandable description of the protocol enables cognitive radios to operate according to the 802.11e standard. Distributed spectrum sharing is performed with the help of the contention-based protocol 802.11e. Spectrum may be shared among different cognitive radios, either in unlicensed spectrum or in opportunistically used licensed spectrum. Our attempt to describe protocols as policies may be a step to software defined medium access control of cognitive radios.
Author Keywords
Download Bibtex
@INPROCEEDINGS{BeMaHiWa_WWRF15,
AUTHOR = {Berlemann, L. and Mangold, S. and Hiertz, G. and Walke, B.},
TITLE = {Enhanced Distributed Channel Access of IEEE 802.11e as Policy for
Cognitive Radios},
YEAR = {2005},
MONTH = {Dec},
PAGES = {7},
ADDRESS = {Paris, France},
BOOKTITLE = {Proceedings of 15th Meeting of the Wireless World Research Forum WWRF15},
AFFILIATION = {Chair of Communication Networks, Faculty 6, RWTH Aachen University},
ANNOTE = {Cognitive Radio, Enhanced Distributed Channel Access, 802.11e, Open
Spectrum, Policy Description Language, DARPA XG},
URL = {https://www.comnets.rwth-aachen.de}
}
Signature in CN-Library = {Qk 015 (2005)-2}