Authors: Shensheng Tang, Wei Li
Addresses: Department of Electrical Engineering and Computer Science, University of Toledo, Toledo, OH 43606, USA. ' Department of Electrical Engineering and Computer Science, University of Toledo, Toledo, OH 43606, USA
Abstract: An analytical modelling and evaluation approach is developed for the integrated 3G/WLAN networks. The cell residence times of different types of users are modelled as a general distribution to adapt various mobility environments. The explicit expressions of channel occupancy times are determined by the Laplace transform approach. The horizontal and vertical handoff rates as well as some interesting performance measures are also derived and calculated by introducing an iterative algorithm. Both our analysis and our numerical results show that the performance of the 3G network is significantly increased when the integrated 3G/WLAN network is employed, especially when the WLANs are in the hot-spot areas. The method developed here is expected to be useful for the modelling and performance evaluation of other kind of networks, such as the 3G networks with the infrastructureless-mode WLANs or ad hoc networks.
Keywords: horizontal handoff; vertical handoff; 3G cellular networks; hot spot WLANs; wireless LANs; wireless networks; call admission control; CAC; channel occupancy time; traffic analysis; modelling; performance evaluation; mobile networks; integration; local area networks.
International Journal of Wireless and Mobile Computing, 2007 Vol.2 No.4, pp.303 - 313
Published online: 18 Jan 2008 *Full-text access for editors Access for subscribers Purchase this article Comment on this article