The design and implementation of a quality-based handover trigger

Marsh, Ian and Grönvall, Björn and Hammer, Florian (2006) The design and implementation of a quality-based handover trigger. In: 5th International IFIP-TC6 Networking Conference, 15-19 May 2006, Coimbra, Portugal.

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Wireless connectivity is needed to bring IP-based telephony into serious competition with the existing cellular infrastructure. However it is well known that voice quality problems can occur when used with unlicensed spectrum technologies such as the popular IEEE 802.11 standards. The cellular infrastructure could provide alternative network access should users roam out of 802.11 coverage or if heavy traffic loads are encountered in the 802.11 cell. Therefore, our goal is to design a handover mechanism to switch ongoing calls to the cellular network when the 802.11 network cannot sustain sufficient call quality. We have investigated load and coverage scenarios and designed, implemented and evaluated the performance of an 802.11 quality-based trigger for the handover of voice calls to the cellular network. We show that our predictive solution addresses the coverage problem and evaluate it within a real setting.

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:VoIP, 802.11, voice, quality
ID Code:443
Deposited By:Mr Ian Marsh
Deposited On:18 Jan 2007
Last Modified:18 Nov 2009 15:56

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