Study on Network Selection for Next-Generation Heterogeneous Wireless Networks

Network selection is one of the most significant challenges for the next-generation wireless heterogenous networks. Many network selection schemes have been proposed, which can mainly be divided into two types: distributed schemes and hybrid schemes. Distributed schemes did not take into consideration the load unbalance problem in the whole heterogeneous system, which was not solved successfully in hybrid schemes either. In this paper, we propose a low complexity, centralized network selection scheme, aiming to optimally distribute the end users to the networks of the heterogeneous wireless system, in the sense of maximizing the global spectrum efficiency. Two suboptimal algorithms are proposed to solve this optimization problem, which are based on the measures of absolute bandwidth request (ABR) and relative bandwidth request (RBR) respectively. The overall bandwidth occupation results and the outage probabilities of the two algorithms are evaluated by means of numerical simulation

[1]  Janise McNair,et al.  Vertical handoffs in fourth-generation multinetwork environments , 2004, IEEE Wireless Communications.

[2]  Janise McNair,et al.  Optimizations for vertical handoff decision algorithms , 2004, 2004 IEEE Wireless Communications and Networking Conference (IEEE Cat. No.04TH8733).

[3]  Ian F. Akyildiz,et al.  A survey of mobility management in next-generation all-IP-based wireless systems , 2004, IEEE Wirel. Commun..

[4]  Keith Knightson,et al.  NGN architecture: generic principles, functional architecture, and implementation , 2005, IEEE Communications Magazine.

[5]  Mario Gerla,et al.  A Smart Decision Model for Vertical Handoff , 2004 .

[6]  Ian F. Akyildiz,et al.  A ubiquitous mobile communication architecture for next-generation heterogeneous wireless systems , 2005, IEEE Communications Magazine.

[7]  John M. Cioffi,et al.  Understanding Digital Subscriber Line Technology , 1999 .

[8]  Helen J. Wang,et al.  Policy-enabled handoffs across heterogeneous wireless networks , 1999, Proceedings WMCSA'99. Second IEEE Workshop on Mobile Computing Systems and Applications.

[9]  Ian F. Akyildiz,et al.  Mobility Management in Next Generation Wireless Systems , 1999, ICCCN.