Open Access Open Access  Restricted Access Subscription or Fee Access

Vertical Handoffs in Wireless Heterogeneous Network

Rajashri P. Sonar, Srija Unnikrishnan


Handovers occur due to the movement of the mobile user from one area to another area. If we don‟t use handovers then whenever a user leaves the area of a particular cell then its ongoing call is immediately disconnected. The process of handovers requires a number of parameters e.g. what is the handover scheme we are using, how many channels are free. In the handover process we should also keep the QoS up to the standard. Vertical handover may be referred to as a process of transferring call connected to a network/data session from one channel connected in a cell to the core network of another. Vertical handover refers to automatic switching of the communication/ data session from one technology to the other. So, it‟s different from a horizontal handover among various wireless access points using the same technology. In future, people will have even more flexibility when true wireless internet and real-time multimedia are provided seamlessly over heterogeneous wireless networks. Optimally combining the capacity and services of the current and emerging networks requires a holistic view of mobility, resource and service management. A framework for the analysis of vertical handoff algorithm sensitivity to various mobility parameters including velocity, handoff delay and dwell time is introduced.


Dynamic Factors, Dynamic Decision Model, Simulation Topology, Vertical Handoff Decision.

Full Text:



Pramod Goyal, and S. K. Saxena, “A Dynamic Decision Model for Vertical Handoffs across Heterogeneous Wireless Networks”.

Yaw Nkansa-Gyekye and Johnson I. Agbinya, "Vertical Handoff Decision Algorithm for UMTS-WLAN", AusWireless 2007, IEEE Computer Society.

L. Chen, T. Sun, B. Chen, V. Rajendran and M.Gerla, “A smart decision Model for vertical handoff”, The 4th Int‟l Workshop on Wireless Internet and Reconfigurability

AN-Navarro, E.; Wong, V.W.S, “A Vertical Handoff Decision Algorithm for Heterogeneous Wireless Networks” IEEE Wireless Communications and Networking Conference, 2007.WCNC 2007.WIRE‟04) (May 2004).

Yi-Bang Lin & Imrich Chlamtac: Wireless and Mobile Network Architectures.

Asoke K Talukder, Hasan Ahmed & Roopa R Yavagal: Mobile Computing (Technology, Applications and Service Creation).

M. Ylianttila, R. Pichna, J. Vallstram, J. Makela, A. Zahedi, P. Krishnamurthy, and K. Pahlavan, “Handoff procedure for heterogeneous wireless networks,” in Proc. of IEEE Global Telecommunications Conference (GLOBECOM‟99), vol. 5, Dec. 1999, pp. 2783 – 2787.

“A Smart Decision Model for Vertical Handoff”, Ling-Jyh Chen, Tony Sun, Benny Chen, Venkatesh Rajendran, Mario Gerla.

M. Angermann and J. Kammann, “Cost Metrics for Decision Problem In Wireless Ad Hoc Networking,” IEEE CAS Workshop on WirelessCommunications and Networking, 2002.

H.J. Wang, R. H. Katz, and J. Giese, “Policy-Enabled Handoffs across Heterogeneous Wireless Networks,” Proc. of ACM WMCSA, 1999.

K. Pahlavan, P. Krishnamurthy, A. Hatami, M. Ylianttila, J. P. Makela, R. Pichna, and J. Vallstron, “Handoff in hybrid mobile data networks,” IEEE Commun. Mag., vol. 7, no. 4, pp. 34 – 47, Apr. 2000.


  • There are currently no refbacks.

Creative Commons License
This work is licensed under a Creative Commons Attribution 3.0 License.