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A Combined Vertical Handover Decision Metric for QoS Enhancement in Next Generation Networks

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4 Author(s)
Vegni, A.M. ; Dept. of Appl. Electron., Univ. of Roma Tre, Rome, Italy ; Tamea, G. ; Inzerilli, T. ; Cusani, R.

Vertical handover (VHO) techniques are applied when mobile users require service continuity and a seamless roaming between heterogeneous networks. A VHO decision can be taken on the basis of physical parameters, such as the received signal strength (RSS), data rate and signal-to-interference and noise ratio (SINR). In this paper, we compare three VHO decision criterions, each of them based on different physical metrics. A smart combination of several VHO criterions is the core of our proposed approach, which uses not only RSS or SINR parameters, but also a hybrid mixture from different wireless access networks. To improve quality of service for mobile users, a data rate gain parameter is introduced that lets an efficient VHO be executed. Simulation results of the proposed VHO approach are in terms of both end-users efficiency, i.e. cumulative received bits, and network performances, i.e. VHO frequency.

Published in:

Wireless and Mobile Computing, Networking and Communications, 2009. WIMOB 2009. IEEE International Conference on

Date of Conference:

12-14 Oct. 2009