RSVP extensions for real-time services in heterogeneous wireless networks
Computer Communications
Intelligent seamless vertical handoff algorithm for the next generation wireless networks
Proceedings of the 1st international conference on MOBILe Wireless MiddleWARE, Operating Systems, and Applications
Computers and Electrical Engineering
TCP Adaptation for Vertical Handoff Using Network Monitoring
ICCS '07 Proceedings of the 7th international conference on Computational Science, Part IV: ICCS 2007
Providing security vertical handoff in SARAH for heterogeneous networks
Journal of Network and Computer Applications
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In the last decade, many new wireless communication systemshave been proposed and developed. These communicationsystems have different extends of network coverage and form a hierarchical overlay network. A vertical handoff is thus occurredwhen moving between these different communication systems.In this paper, we propose a new vertical handoff scheme: VHOST(Vertical Hand-Off through Seamless TCP-migration).In VHOST, we first design the mechanism to detect an ongoinghandoff. Then, on the basis of TCPmigration, we show howa connection is migrated from the old communication system tothe new one. Finally, VHOST includes a handoff-aware TCP adaptation mechanism for link adaptation to accommodate withthe different network characteristics. To verify the feasibility of our approach, we implement a prototype system on Linux. The experimental results show that the vertical handoff time is shortand acceptable for most applications. Besides, TCP performanceis improved by our proposed handoff-aware adaptation scheme. For example, the TCP throughput by proposed adaptation schemeis 1.8 times the original TCP without adaptation.