Abstract

To provide anywhere at any time services in an integrated wireless networking environment, seamless mobility is one of the most important and challenging issues. Recent literature shows that the seamless mobility can be achieved by performing significant modifications in existing network designs and protocol architectures. However, such intensive modification increases the network implementation complexity and deployment cost. In this study , we have proposed a Simple and Seamless Vertical Handoff Protocol (SSVHOP) to attain the seamless mobility without implementing any major modification in the existing network topology or protocol architecture. The foundations of the underlying principle of the SSVHOP are based on a proactive RSS handoff triggering mechanism and multi-homing capabilities of mobile terminal. In addition, SSVHOP reduces the signaling and processing cost of the network to achieve low handoff delay and packet loss during upward and downward vertical handoff scenarios. Moreover, it has been observed that the proposed design also improves the data session performance by routing the data packets on the optimal route and by introducing an overhead free mechanism for data transportation in an integrated UMTS/WLAN network. We evaluated and compared the SSVHOP with the tight coupling mechanism. By analyzing mathematical modeling and simulation results, it is evident that the SSVHOP performs better than the tight coupling mechanism for all tested applications and measurement parameters.

Keywords:

Heterogeneous wireless networks, loose coupling, seamless mobility, tight coupling, UMTS/WLAN integration, vertical handoff,

References

1. Altwelib, H. and M. Ashibani, 2005. Vertical Handover Scheme for Next Generation Mobile Networks (4G). Central Drakensberg, Kwazulu-Natal, South Africa, (Accessed on: September 11-14, 2005).
   Direct Link
2. Altwelib, H., M. Ashibani and F.B. Shatwan, 2007. Performance evaluation of an integrated vertical handover model for next generation mobile networks using virtual MAC addresses. Proceeding of the Southern African Telecommunication Networks and Applications Conference (SATNAC). South Africa, September 9-13, pp: 1-4.
   
3. Barja, J.K., C.T. Calafate, J.C. Cano and P. Manzoni, 2011. An overview of vertical handover techniques: Algorithms, protocols and tools. Comput. Commun., 34: 985-997.
   CrossRef    
4. Benoubira, S., M. Frikha and S. Tabbane, 2011. Loose coupling approach for UMTS/WiMAX integration. Proceeding of IFIP Wireless Days (WD). Niagara Falls, ON, Oct. 10-12, pp: 1-3.
   CrossRef    
5. Buddhikot, M., G. Chandranmenon, S. Han, Y.W. Lee, S. Miller and L. Salgarelli, 2003. Integration of 802.11 and third-generation wireless data networks. Proceeding of the IEEE 22nd Annual Joint Conference of the IEEE Computer and Communications Societies (INFOCOM), 30 March-3 April, pp: 503- 512.
   
6. Dunmore, M. and T. Pagtzis, 2005. Mobile IPv6 Handovers: Performance Analysis and Evaluation. 6net, 1-30.
   Direct Link
7. Johnson, D., C. Perkins and J. Arkko, 2004. Mobility Support in IPv6. IEEE RFC 3775, June 2004.
   Direct Link
8. Kaur, P. and M. Singh, 2012. Comparative analysis of vertical handover in integrated networks. Proceeding of the International Conference on Recent Advances and Future Trends in Information Technology, pp: 38-42.
   PMCid:PMC4005998    
9. Koh, S.J., Q. Xie and S.D. Park, 2005. Mobile SCTP (mSCTP) for IP Handover Support, IETF Internet Draft, draft-sjkoh-msctp-01, October 2005.
   
10. Koodli, R., 2005. Fast Handovers for Mobile IPv6. IETF Internet Draft, Jul. 2005.
    
11. Lampropoulos, G., N. Passas, A. Kaloxylos and L. Merakos, 2007. A flexible UMTS/WLAN architecture for improved network performance. Wireless. Pers. Commun., 43: 889-906.
    CrossRef    
12. Liu, C. and C. Zhou, 2005. An improved interworking architecture for UMTS-WLAN tight coupling. Proceeding of the IEEE Wireless Communications and Networking Conference, March 13-17, pp: 1690- 1695.
    
13. Liu, B., P. Martins and P. Bertin, 2010. Cross-layer design of the inter-RAT handover between UMTS and WiMAX. EURASIP J. Wirel. Commun. Netw., 2010: 1-13.
    CrossRef    
14. Ma, L., F. Yu, V.C.M. Leung and T. Randhawa, 2004. A new method to support UMTS/WLAN vertical handover using SCTP. Proceeding of the IEEE Wireless Communications, 11: 44-51.
    
15. Nguyen-Vuong, Q.T., N. Agoulmine and Y. Ghamri-Doudane, 2007. Terminal-controlled mobility management in heterogeneous wireless networks. IEEE Commun. Mag., 45: 122-129.
    CrossRef    
16. Patil, M.B., 2011. Vertical handoff in future heterogeneous 4G networks. Int. J. Comput. Sci. Netw. Secur., 11: 201-206.
    
17. Perkins, C., 2002. IP mobility support for IPv4. IETF RFC 3344, 2002.
    CrossRef    
18. Pries, R., A. Mäder and D. Staehle, 2006. A Network Architecture for a Policy-Based Handover across Heterogeneous Networks. OPNETWORK, Washington, D.C., USA, pp: 1-9.
    PMid:16999215    
19. Pries, R., D. Staehle, P. Tran-Gia and T. Gutbrod, 2008. A seamless vertical handover approach. Lect. Notes Comput. Sc., 5122: 167-184.
    CrossRef    
20. Rizvi, S., A. Aziz and N.M. Saad, 2010. An overview of vertical handoff decision policies for next generation wireless networks. Proceeding of IEEE Asia Pacific Conference on Circuits and Systems (APCCAS). Malaysia, Dec. 6-9, pp: 88-91.
    CrossRef    
21. Rizvi, S. and N.M. Saad, 2012. A dual mode mobile terminal for enhanced performance of data services in NGN networks. Eur. J. Sci. Res., 67: 360-377.
    
22. Rosenberg, J., H. Schulzrinne, G. Camarillo, A. Johnston, J. Peterson et al., 2002. SIP: Session Initiation Protocol. IETF RFC 3261, June 2002.
    
23. Salkintzis, A.K., C. Fors and R. Pazhyannur, 2002. WLAN-GPRS integration for next-generation mobile data networks. IEEE Wirel. Commun., 9: 112-124.
    CrossRef    
24. Soliman, H., C. Castelluccia, K. El-Malki and L. Bellier, 2008. Hierarchical Mobile IPv6 Mobility Management. IETF RFC 5830, Oct. 2008.
    
25. Tom, V.L., I. Moerman and P. Demeester, 2006. Location assisted fast vertical handover for UMTS/WLAN overlay networks. Comput. Commun., 29: 2601-2611.
    CrossRef    
26. Tsao, S.L. and C.C. Lin, 2002a. Design and evaluation of UMTS-WLAN interworking strategies. Proceeding of Vehicular Technology Conference, Sept. 24-28, pp: 777-781.
    PMid:12492110    
27. Tsao, S.L. and C.C. Lin, 2002b. VGSN: A gateway approach to interconnect UMTS/WLAN networks. Proceeding of the 13th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, Sept. 15-18, pp: 275- 279.
    CrossRef    
28. Varma, V.K., S. Ramesh, K.D. Wong, M. Barton, G. Hayward and J.A. Friedhoffer, 2003. Mobility management in integrated UMTS/WLAN networks. Proceeding of the IEEE International Conference on Communications (ICC), May 11-15, pp: 1048-1053.
    CrossRef    

Competing interests

The authors have no competing interests.

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