With the advance of various wireless access technologies, the demand for a mobile user equipped with multiple air interfaces simultaneously executing diverse applications emerged. In such network environments, per-application mobility management is a key to allow each application of an end user device to dynamically and fully take advantage of the most suitable access technology. In this paper an application-oriented media independent vertical handover decision (AMIVHD) mechanism for video transmission by a mobile user over heterogeneous network environment is implemented. The proposed concept enables the triggering of vertical handover decisions based on the quality measurements of video transmission in wireless networks. For application based handover decision, mobility management as well as transport/application protocol control adaptation for handover performance optimization is made with the help of Media Independent Handover (IEEE 802. 21) Frame work. Through the simulation results, it is shown that multi-layer handover triggering of the proposed concept enhances the QoS of the application services. The handover decisions are made when the QoS requirements of an application is not satisfied as well as when a mobile user moves out of the current access network in overlay network environments. It is also presented that per-application handover based on the proposed platform enhances the QoS of the application services compared to the handover approaches which make every on-going service flows handover together to the same access network.

1. Chang A. M, Hyunjeong Lee b, Meejeong Lee a, "A per-application mobility management platform for application-specific handover decision in overlay networks",Computer networks, Vol. 53, No. 11, 2009, pp. 1846-1852.
2. Enrique. S. N, Wong. V. W. S, Lin. Y, "A vertical handoff decision algorithm for heterogeneous wireless networks", In IEEE Wireless Communications and Networking Conference, 2007,Hong Kong, China, pp. 3199-3204
3. Kannan Varadhan, Kelvin Fall, "The ns Manual (formerly ns Notes and Documentation)", the VINT Project, researchers at UC Berkely, LBL, USC/ISI, and Xerox PARC, January 6, 2009.
4. Kim. M, Cho. S. J, KIM. S. Y, "A study of seamless handover service and QoS in heterogeneous wireless networks", In 9th International Conference Advanced Communication Technology, 2007, Seoul, Korea, , vol. 3, pp. 1922-1925.
5. Makaya. C, Pierre. S, "Efficient handoff scheme for heterogeneous IPv6-based wireless networks", In IEEE Wireless Communications and Networking Conference, 2007, Hong Kong, China, pp. 3256-3261.
6. Salkintzis. K, Nikos Passas, George Lampropoulos, Apostolis "Media-Independent Handover for Seamless Service Provision in Heterogeneous Networks", In IEEE Communications Magazine, 2008, pp. 63-71.
7. A Performance Evaluation Model for RSS-based Vertical Handoff Algorithms (Tong Shu, Min Liu, Zhongcheng Li-2009)
8. Improvement in Packet Drop during Handover between WiFi and WiMax (B. R. Chandavarkar, Dr. G. Ram Mohana Reddy - 2011)
9. Handover Triggering Mechanism Based on IEEE 802. 21 in Heterogeneous Networks with LTE and WLAN (Sueng Jae Bae and Min Young Chung, Jungmin So – IEEE 2011)
10. Optimized Performance Evaluation Of LTE Hard Handover Algorithm With Average RSRP Constraint (Cheng-Chung Lin, Kumbesan Sandrasegaran, Huda Adibah Mohd Ramli, and Riyaj Basukala April 2011)
11. Cross-Layer-Based Adaptive Vertical Handoff With Predictive RSS in Heterogeneous Wireless Networks (Ben-Jye Chang, Member, IEEE, and Jun-Fu Chen).

Amivhd Vertical Handover Decision Wi-fi Wimax Umts