Wireless Coexistence and Spectrum-Sharing
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Jon M. Peha
Carnegie Mellon University
http://www.ece.cmu.edu/~peha/
As consumers begin looking to their televisions for computing resources,
and to the Internet for the latest music, seemingly unrelated systems are
beginning to merge. Simultaneously, palmtop information devices and
pagers are putting information processing in our pockets. Intelligent
devices will become increasingly pervasive to form a smart
environment, wherein personalized devices interact with users,
sense their environment, and communicate with each other. Some devices
will be fixed, connected to televisions, phone lines, desktop computers, and
sensors. Other devices will be mobile, carried in cars, brief cases, and even
clothing.
The communications resources to support such a system do not currently
exist. Such a system requires open access to spectrum, i.e. it must be
possible to begin transmissions in a particular location without prior
consent or licensing procedures. The reasons are two-fold. First, because
the number of deployed devices will be large, the overhead of a licensing
process would be excessive. Second, some devices will be mobile, and it is
not efficient to give a mobile device exclusive rights to spectrum at every
location where the device might ever reside. Current allocations are likely
to be inadequate for widescale deployment, and there are serious
challenges to overcome in creating an open access environment.
Can a number of independent systems coexist and share spectrum without
undue interference? When contention leads to congestion,
will access be fair? Will performance degrade gracefully?
Yes, if and only if the right access protocols are employed.
See the
Wireless Andrew research project and experimental infrastructure.
Some relevant publications:
- J. M. Peha,
"Wireless Communications and Coexistence
for Smart Environments," IEEE Personal Communications.
-
Durga P. Satapathy and Jon M. Peha,
``Etiquette Modifications For Unlicensed Spectrum: Approach
and Impact,"
Proceedings of IEEE Vehicular Technology
Conference (VTC-98)
, Ottawa, Canada, May 1998, pp. 272-276.
-
Durga P. Satapathy and Jon M. Peha,
"Performance of Unlicensed Devices with a Spectrum Etiquette,"
Proceedings of IEEE Globecom-97, Phoenix, Arizona, November 1997
pp. 414-418.
- J. M. Peha,
"Spectrum Management Policy Options,"
IEEE Communications Surveys , 1998.
- J. M. Peha,
"The Path Towards Efficient Coexistence in Unlicensed Spectrum,"
IEEE 802.16 Wireless High-Speed Unlicensed Metropolitan
Area Network Standards, April 2000.
-
Jon M. Peha,
``Wireless Communications and Coexistence in Smart Environments,''
Proceedings of DARPA/NIST/NSF Workshop on Research
Issues in Smart Computing Environments,
Altanta, Georgia, July 1999.
-
Durga P. Satapathy and Jon M. Peha,
"Spectrum Sharing Without Licenses: Opportunities and Dangers," in
Interconnection and the Internet: Selected Papers From the
1996 Telecommunications Policy Research Conference,
Gregory L. Rosston and David Waterman editors,
Mahwah, NJ: Lawrence Erlbaum Associates, Inc., 1997, pp. 49-75.
-
Hector Salgado, Marvin Sirbu, and Jon M. Peha,
``A Narrow
Band Approach to Efficient PCS Spectrum Sharing Through Decentralized
DCA Access Policies,''
IEEE Personal Communications,
Volume 4, Number 1, February 1997, pp. 24-34.
-
Jon M. Peha, ``Developing Equipment and Services for Shared Spectrum:
Is It A Good Gamble?,''
International Engineering Consortium Annual
Review of Communications, Volume 50, 1997, pp. 955-958.
-
Hector Salgado, Marvin Sirbu, and Jon M. Peha,
"Spectrum Sharing Through Dynamic Channel Assignment For
Open Access To Personal Communications Services,"
Proceedings of IEEE International
Conference on Communications
ICC-95, Seattle, June 1995, pp. 417-422.
-
Hector Salgado, Marvin Sirbu, and Jon M. Peha, ``Use of Spectrum Sharing
in PCS Applications,'' Proceedings of 5th IEEE Autumn
Meeting on Communications
and Computation, Acapulco, Mexico, October 1994, pp. 148-166.
-
Jon M. Peha,
``Office Microcells and City-Wide Macrocells: The Case for a Seamless
Connection,'' abstract and overview of invited presentation,
in Proceedings of International Engineering Consortium Fifth
Annual Worldwide Personal Communications ComForum, Chicago,
Illinois,
June 1994.
Jon Peha's home page.
List of Publications
peha@cmu.edu