NDLI: Downlink VoIP Capacity with Network-Synchronized Cyclic Beamswitching

Content Provider	IEEE Xplore Digital Library
Author	Hosein, P.
Copyright Year	2010
Abstract	The next generation of wireless networks (e.g., Long Term Evolution (LTE) and WiMAX) use multiple techniques to improve channel spectral efficiencies. In this paper we focus on one such technique, namely Coordinated Beam Switching (CBS). With CBS, each sector determines a sequence of beams (possibly with repetitions) over which it continuously cycles. Each sector independently determines its beam pattern with the only constraint being that all sectors use a common cycle period. A beam can be used for the entire frame or one may use different beam patterns for each subband of the frame. Therefore the interference pattern of each subband of a sector repeats with the same period and hence the channel quality can be predicted if we assume slow moving UEs (User Equipment). Such a method may not be suitable for delay sensitive applications but, in the case of VoIP, the periodic arrivals of VoIP packets can be synchronized with the periodic service provided to the UE. Furthermore, VoIP service is limited by UEs at the edge but these are precisely the UEs that benefit from beamforming. In this paper we provide algorithms for accomplishing this synchronization and illustrate the corresponding VoIP capacity gains through simulations.
Starting Page	1
Ending Page	6
File Size	127249
Page Count	6
File Format	PDF
ISBN	9781424464050
e-ISBN	9781424464067
DOI	10.1109/WCNCW.2010.5487654
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-04-18
Publisher Place	Australia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Array signal processing Wireless networks Interference Performance gain Downlink Resource management Delay Long Term Evolution Next generation networking Signal to noise ratio
Content Type	Text
Resource Type	Article

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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
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