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Hybrid Model to Reduce Latency in Vertical Hand Off
| International Journal of Computer Applications |
| Foundation of Computer Science (FCS), NY, USA |
| Volume 49 - Number 23 |
| Year of Publication: 2012 |
| Authors: Muhammad Faisal, Muhammad Ibrahim |
10.5120/7940-0650
|
Muhammad Faisal, Muhammad Ibrahim . Hybrid Model to Reduce Latency in Vertical Hand Off. International Journal of Computer Applications. 49, 23 ( July 2012), 1-6. DOI=10.5120/7940-0650
Abstract
As the number of network service provider's increases so the numbers of handoffs are increases to avail the best quality of services within affordable cost. In such scenarios fast and secure handoff is obligatory but diversification always creates worries of intruders and latency due to heterogeneous architectures with multiple access points. And elongated latency may go ahead to jitter, ping pong effect, triangular routing and packet loss like issues. Neither the reactive nor the proactive protocols alone for vertical hand off addresses the problem of latency efficiently due to their onboard calculation during peak time of handoff. Ensuring security in such frequent vertical handover without interrupted and delayed services is challengeable but desirable as well. Here we proposed a hybrid model for vertical handoff dividing the standard IEEE 802. 11 hand off phases in reactive and proactive manner. Initially executing triggering, discovery and authentication phases in proactive mode while association, IP acquisition and home agent acquisition phases in reactive. That will eventually results in reducing latency and packet loss in the best possible way for vertical handoff while maintaining effective continuous session and provide reliable services. For performance evaluation in our scheme we used reactive (AODV), proactive (OLSR) and hybrid (TORA) protocols via OPNET simulator. Parameters used are throughput, end-to-end delay and packet delivery ratio. The results show that hybrid protocol using less time comparatively with either reactive or proactive protocols.
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