NDLI: Reducing the signalling overhead for wireless VoIP transmission using weighted prioritisation

Content Provider	IEEE Xplore Digital Library
Author	Tesanovic, M. Moulsley, T. Baker, M.
Copyright Year	2009
Description	Author affiliation: Philips Research Laboratories Cambridge, United Kingdom (Tesanovic, M.; Moulsley, T.; Baker, M.)
Abstract	User scheduling in future cellular networks is a complex and much-studied problem, further complicated in the increasingly relevant scenario of delay-sensitive VoIP applications. In such cases, the full buffer model that attempts to maximise the total sum-rate of the individual users does not adequately capture the satisfaction level of the users. As a result, fairness needs to be introduced and this is done in this paper through a modification of the weighted fair queuing (WFQ) approach to resource allocation that uses buffer status reports from mobile terminals (MTs). Put another way, user rates are weighted by respective buffer fill levels. In addition to outperforming both maximum sum-rate and the “conventional” proportional fair scheduling (PFS) algorithm in terms of the number of satisfied users for VoIP applications, the WFQ used is shown to be able to help reduce the signalling overhead: it is demonstrated here that the weights applied can be adapted depending on the frequency with which the resource allocation is updated. This enables the system to benefit from the reduction in signalling overhead (which arises from a reduced resource allocation update rate) at a diminished loss of performance. Results are based on practical simulation scenarios that can be applied to both LTE and W-CDMA systems and are revealing in terms of the user capacities these systems can offer under realistic levels of traffic load.
Starting Page	580
Ending Page	584
File Size	215861
Page Count	5
File Format	PDF
ISBN	9781424435845
DOI	10.1109/ISWCS.2009.5285224
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-09-07
Publisher Place	Italy
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	fair scheduling algorithms Laboratories Throughput Multiaccess communication Scheduling algorithm Delay Radio spectrum management resource allocation Land mobile radio cellular systems wireless packet systems QoS mechanisms Traffic control Performance loss VoIP performance Resource management
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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