Recently, mobile communications need to benefit a good level of Quality of Services (QoS), to satisfy the current application's need. As the number of mobiles and mobile networks increases every year, we are facing new problems and challenges in incorporate various networks with various standards and technologies. In that the problem of handoff is a big parameter which affects the performance dramatically. In this paper we have proposed a method for minimizing the handoff latency which considers various factors like QoS, Energy Level, User Preferences, Network Status, Mobile Movement Direction and Location. The proposed method is suitable for reducing latency in both horizontal and vertical handoff.

1. V. Saravanan, A. Sumathi, "Handoff Mobiles with Low Latency in Heterogeneous Networks for Seamless Mobility: A Survey and Future Directions", European Journal of Scientific Research, 2012, Vol. 81 No. 3, pp. 417-424.
2. Passas, N. , Paskalis, S. , Kaloxylos, A. , Bader, F. , Narcisi, R. , Tsontsis, E. , Jahan, A. , ghvami, H. , O'Droma, M. , and Ganchev, I. 2006. Enabling technologies for the 'always best connected' concept: Research Articles. Wirel. Commun. Mob. Comput. 6, 4 (Jun. 2006), 523-540.
3. Shantidev Mohanty and Ian F. Akyildiz. : A Cross-Layer (Layer 2 + 3) Handoff Management Protocol for Next-Generation Wireless Systems. IEEE Transactions on Mobile Computing, Vol. 5, No. 10, October 2006.
4. Hoang Nam Nguyen and Iwao Sasase. : Downlink Queuing Model and Packet Scheduling for Providing Lossless Handoff and QoS in 4G Mobile Networks. IEEE Transactions on Mobile Computing, Vol. 5, No. 5, May 2006.
5. Farhan Siddiqui, Sherali Zeadally, Mobility management across hybrid wireless networks: Trends and challenges, Computer Communications, Volume 29, Issue 9, Pages 1363-1385, Oct 2005.
6. Nidal Nas, Ahmed Hasswa and Hossam Hassanein. : Handoffs in Fourth Generation Heterogeneous Networks. IEEE Communications Magazine. October 2006.
7. Pahlavan, K. ; Krishnamurthy, P. ; Hatami, A. ; Ylianttila, M. ;Makela, J. P. ; Pichna, R. ; Vallstron, J. ; , "Handoff in hybrid mobile data networks," Personal Communications, IEEE, vol. 7, no. 2, pp. 34-47, Apr 2000.
8. Lampropoulos, G. ; Passas, N. ; Merakos, L. ; Kaloxylos, A. ; , "Handover management architectures in integrated WLAN/cellular networks," IEEE Commun. Surveys & Tutorials , vol. 7, no. 4, pp. 30- 44, Fourth Quarter 2005.
9. Shantidev Mohanty and Ian F. Akyildiz. : Performance Analysis of Handoff Techniques Based on Mobile IP, TCP-Migrate, and SIP. IEEE Transactions on Mobile Computing, Vol. 6, No. 7, July 2007.
10. Jae-Won Kim, Hye-soo Kim, Jae-Noong Yun and Sugn-Jea Ko W. Grass et al. (Eds); ARCS 2006, LNCS 3894 PP. 397. 406, 2006. C Springer-Verlag Berlin Heidelberg 2006.
11. Kailash Chander, Dr. Dimple Juneja, Dr. S. S Iyengar and Dr. Supratik Mukhopadhyay, "An Agent Based Smart Solution For Vertical Handover In 4G", International Journal of Engineering Science and Technology, Vol. 2(8), 3381-3390, 2010.
12. S. V. Saboji and C. B. Akki, "A client-based vertical handoff system in 4G wireless networks", Journal of advances in information technology, vol 1, No 4, 2010.
13. Chunming Liu and Dr. Chi Zhou, "Challenges and Solutions for Handoff Issues in 4G Wireless Systems an Overview", 2nd International Latin American and Caribbean Conference for Engineering and Technology (LACCEI'2004).
14. Alejandro Quintero and Eduardo Del Frutos, "MPLS Based Architecture for Mobility and Endto- End QoS Support in Fourth Generation Mobile Networks", Journal of Computer Science 5 (4): pp 255-262, 2009.
15. "Policy-Enabled Handoffs across Heterogeneous Wireless Networks," Proc. of ACM WMCSA, 1999, by H. J. Wang, R. H. Katz, and J. Giese:
16. Niyato, D. ; Hossain, E. , "WIRELESS BROADBAND ACCESS: WIMAX AND BEYOND - Integration of WiMAX and WiFi: Optimal Pricing for Bandwidth Sharing," IEEE Commun. Mag. , vol. 45, no. 5, pp. 140-146, May 2007.
17. In "Policy-Enabled Handoffs across Heterogeneous Wireless Networks," Proc. of ACM WMCSA, 1999, by H. J. Wang, R. H. Katz, and J. Giese:
18. Liang, B. , Haas, Z. J. : Predictive Distance-Based Mobility Management for Multidimensional PCS Network. IEEE/ACM Transactions on Networking, Vol. 11, No. 5, Oct. 2003.
19. Karimi, H. A. , Liu, X. : A Predictive Location Model for Location-based Services. ACM Int. Workshop Advances in Geographic Information Systems (GIS), Nov. 2003.
20. Kapoor, V. , Edwards, G. , Sankar, R. : Handoff Criteria for Personal Communication Networks. IEEE Int. Conf. Communications (ICC), May 1994.
21. Sheu, S. T. , Wu, C. C. : Using Grey Prediction Theory to Reduce Handoff Overhead in Cellular Communication Systems. IEEE Int. Symp. Personal, Indoor and Mobile Radio Communications (PIMRC), Sep. 2000.
22. DeLeon, P. , Sreenan, C. J. : An Adaptive Predictor For Media Playout Buffering. IEEE Int. Conf. Acoustics, Speech, and Signal Processing (ICASSP), Mar. 1999.
23. Jochen Schiller, "Mobile Communications", PHI/Pearson Education, Second Edition, 2003.
24. V. Saravanan, Dr. A. Sumathi, "Dynamic Handoff Decision Based on Current Traffic Level and Neighbor Information in Wireless Data Networks", International Conference on Advanced Computing, 2012.
25. Chien-Chao Tseng, Kuang-Hui Chi, Ming-Deng Hsieh and Hung-Hsing Chang, "Location based Fast Handoff for 802. 11 Networks". IEEE Communications Letters, Vol. 9, No. 4, April 2005.

Handoff Latency Qos User Preferences Network Status Mobile Direction Location Horizontal Vertical Energy Level