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A heuristic analysis approach to admission control for voice in packet switched wireless networks

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2 Author(s)
Nageshar, N. ; Univ. of the Witwatersrand, Johannesburg, South Africa ; Van Olst, R.

In considering Fourth Generation (4G) wireless networks and beyond, such have evolved from circuit switch technology to packet switched technology. This inherently implies that the flaws of both wireless and IP work concurrently to degrade voice quality. The following paper proposes the application of an admission control scheme utilising heuristic analysis for the recognition of voice calls at various levels of the OSI stack. The philosophy is deemed to recognise and prioritise voice admission in a packet switched wireless network. The proposed scheme is investigated so as to provide improved voice quality by accurately recognising and admitting voice traffic over other services. In the solution presented voice classifiers using Deep Packet Inspection (DPI) at the e-Node-B level are proposed for operators and manufacturers to analyse and consider. This is further combined with a variable admission control policy so as to provide a combined heuristic analysis and admission control scheme. SIP and Google Talk are analysed to devise a pattern of recognition. The probability of recognition in combination with the admission control policy is simulated to determine the blocking probability of the combined scheme.

Published in:

AFRICON, 2011

Date of Conference:

13-15 Sept. 2011

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