Vertical Handover Management for VoIP Session over Broadband Wireless Networks

Abstract

Today, wireless LAN (IEEE802.11g/n) has been the dominant wireless network that can provide high data rates in a limited coverage area. While emerging mobile WiMAX (IEEE802.16e) can provide a wireless broadband access to mobile users in a wide coverage area. These two different technolgies will co-exist while complementing each other in some regions, hence, a mobile node (MN) with dual interfaces traverses and executes many handovers (HOs) between 802.11g and 802.16e. Meanwhile, there is a huge demand for Voice over IP (VoIP) service over wireless networks. However, VoIP is a delay and loss sensitive application, hence, VoIP session is more likely to be deteriorated during HO between 802.11g and 802.16e. In order to maintain quality of VoIP session during HO, we proposed Vertical Handover Management (VHM) for VoIP session that focuses on HO initiation and decision strategy according to the wireless link condition and congestion state of wireless networks. The VHM exploits request to send (RTS) retries and round trip time (RTT) between an MN and an access point in an 802.11g interface as well as a carrier to interference noise ration (CINR) level and MN’s queue length of an 802.16e interface as HO triggers. We then conducted simulation experiments to evaluate the effectiveness of our proposed VHM using QualNet 4.5. Our simulation results show that our proposed VHM can preserve the quality of VoIP session during such HOs.

Share and Cite:

M. Niswar, S. Kashihara and S. Yamaguchi, "Vertical Handover Management for VoIP Session over Broadband Wireless Networks," International Journal of Communications, Network and System Sciences, Vol. 6 No. 6, 2013, pp. 289-299. doi: 10.4236/ijcns.2013.66031.

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1] A. H. Zahran and B. Liang, “Performance Evaluation Framework for Vertical Handoff Algorithms in Heteregeneous Networks,” Proceedings of IEEE International Conference on Communications (ICC’05), Seoul, 16-20 May 2005, pp. 173-178.
[2] S. Mohanty and I. F. Akyilidiz, “A Cross-Layer (Layer 2 + 3) Handoff Management Protocol for Next Generation Wireless Systems,” IEEE Transactions on Mobile Computing, Vol. 5, No. 10, 2006, pp. 1347-1360. doi:10.1109/TMC.2006.142
[3] H. Y. Liu, et al., “A Smart Triggering Scheme to Reduce Service Interruption during Heterogeneous Handovers,” Proceedings of International Conference on Dependable Systems and Networks, Boston, 24-27 June2008.
[4] B.-J. Chang and J. F. Chen, “Cross-Layer-Based Adaptive Vertical Handoff with Predictive RSS in Heterogeneous Wireless Networks,” IEEE Transaction on Vehicular Technology, Vol. 57, No. 6, 2008, pp. 3679-3692.
[5] Z. Dai, et al., “Vertical Handover Criteria and Algorithm in IEEE 802.11 and 802.16 Hybrid Networks,” Proceedingds of IEEE International Conference on Communication (ICC2008), Beijing, 19-23 May 2008, pp. 2480-2484.
[6] A. S. Rashid, et al., “WiFi/WiMAX Heterogeneous Seamless Handover,” Proceedings of 3rd International Conference on Broadband Communication, Pretoria, 23-26 November 2008, pp. 169-174.
[7] V. Gupta, et al., “IEEE 802.21 Tutorial,” 2006. http://www.ieee802.org/21/Tutorials/802%2021-IEEE-Tutorial.ppt
[8] M. Niswar, et al., “Handover Management for VoWLAN Based on Estimation of AP Queue Length and Frame Retries,” IEICE Transaction on Information and System, Vol. E92-D, No. 10, 2009, pp. 1847-1856.
[9] S. Kashihara and Y. Oie, “Handover Management Based on the Number of Data Frame Retransmissions for VoWLAN,” Elsevier Computer Communications, Vol. 30, No. 17, 2007, pp. 3257-3269. doi:10.1016/j.comcom.2007.01.014
[10] “Scalable Network Technology.” http://www.scalablenetworks.com/
[11] ITU-T Recommendation G.107, “The E-Model: A Computational Model for Use in Transmission Planning,” 2005.
[12] Cole, “Voice over IP Performance Monitoring,” ACM SIGCOMM Computer Communication Review, Vol. 31, No. 2, 2001, pp. 9-24.

Copyright © 2024 by authors and Scientific Research Publishing Inc.

Creative Commons License

This work and the related PDF file are licensed under a Creative Commons Attribution 4.0 International License.