NDLI: Polling based media access protocols for use with smart adaptive array antennas

Content Provider	IEEE Xplore Digital Library
Author	Krishnamurthy, S.V. Acampora, A.S. Zorzi, M.
Copyright Year	1998
Description	Author affiliation: Inf. Sci. Lab., HRL Labs., Malibu, CA, USA (Krishnamurthy, S.V.)
Abstract	The use of an adaptive antenna array at each base station of a wireless network can provide substantial immunity to the effects of multipath fading and co-channel interference. Among the expected benefits are higher data rates, greater frequency re-use factor, and, overall, higher capacity systems as needed to enable wireless multimedia services. Media access control (MAC) protocols which facilitate the deployment of such an array have been previously proposed and studied. These MAC protocols invoke the delivery of a pilot tone from each packet access unit in the network as needed, so that the array antenna at the associated base station may rapidly adjust its weighting coefficients, thereby ensuring subsequent reliable communication between the access unit and the base station. This paper considers two modifications to these earlier protocols with the intent of improving the utilization efficiency and mean delay performance. A more general traffic model is considered and reasonable approximations are invoked to study the performance of the modified protocol. It is shown that with the proposed modifications, a maximum link utilization efficiency of about 97% is readily achieved. Further, it is shown that this maximum utilization efficiency is independent of the number of remote users in the network. The modifications also help in achieving a considerable reduction in the average delay in low load regimes. For typical system parameters, results show that at very low loads, the average delay is only about 10% of the average delay experienced when the old protocol is used.
Starting Page	337
Ending Page	344
File Size	867979
Page Count	8
File Format	PDF
ISBN	0780351061
ISSN	10918442
DOI	10.1109/ICUPC.1998.733001
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1998-10-05
Publisher Place	Italy
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Media Access Protocol Delay Base stations Access protocols Adaptive arrays Antenna arrays Wireless networks Fading Interchannel interference Frequency
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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