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Performance evaluation of a mobile QoS adaptation strategy for wireless ATM networks

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2 Author(s)
George Lin ; IBM Global Service, San Francisco, CA, USA ; C. -K. Toh

We introduce an end-to-end QoS adaptation framework to resolve QoS inconsistencies as a result of mobile handoffs in wireless ATM (WATM) networks. We define mobile QoS (M-QoS) to comprise of wired, wireless and handoff QoS parameters. We introduce two forms of adaptation, namely: (a) application and (b) network QoS adaptation. The former is concerned with bandwidth, delay variation and packet loss adaptation by the mobile application while the latter refers to M-QoS fulfilment, upgrade and downgrade. New procedures are defined for M-QoS upgrade and downgrade, so that QoS `refresh' traffic is controlled and the overall time required to perform a handoff remains largely unaffected. Results obtained from a call-level mobile network simulator further confirms the advantages of the proposed QoS adaptation scheme

Published in:

Communications, 1999. ICC '99. 1999 IEEE International Conference on  (Volume:2 )

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