naa a22 4500 510798268 CHVBK 20180411083344.0 cr unu---uuuuu 180411e20131001xx s 000 0 eng 10.1007/s11277-013-1160-6 doi (NATIONALLICENCE)springer-10.1007/s11277-013-1160-6 Moon Bongkyo Department of Computer Science and Engineering, Dongguk Univ-Seoul, Seoul, Korea (ROK) aut Analysis of Ongoing SIP Session with Resource Reservation in Vertical Handover Scenario [Elektronische Daten] [Bongkyo Moon] Typically, WiFi-to-3G handover is time-critical depending on mobility and speed of mobile host (MH) while 3G-to-WiFi handover is optional for better quality of service and less cost. In this paper, a WiFi-to-3G vertical handover scheme is proposed in order to reduce the total handover delay and keep it within a desirable maximum limit. Our main concern is focused on MH attached currently to WiFi, which tries to move out of WLAN for switching to 3G link. Received signal strength (RSS) is actually an important decision criterion for vertical handover as well as horizontal handover. However, WiFi-to-3G vertical handover cannot be triggered by the signal decay of 3G system since there is no comparable signal strength available to aid the 3G handover decision. During WiFi-to-3G vertical handover, moreover, multimedia session initiation protocol (SIP) session re-setup with resource reservation cannot be completed before network resources along the new path via 3G are successfully reserved. Hence, RSS-based vertical handover algorithm with SIP session re-setup is proposed. From the results, we can know that well-defined or dynamically-adjusted threshold values could result in getting enough time in order to re-setup SIP session with resource reservation. Springer Science+Business Media New York, 2013 Vertical handover nationallicence RSS threshold nationallicence SIP session nationallicence Resource reservation nationallicence QoS nationallicence Wireless Personal Communications Springer US; http://www.springer-ny.com 72/4(2013-10-01), 2481-2497 0929-6212 72:4<2481 2013 72 11277 https://doi.org/10.1007/s11277-013-1160-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11277-013-1160-6 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Moon Bongkyo Department of Computer Science and Engineering, Dongguk Univ-Seoul, Seoul, Korea (ROK) aut NATIONALLICENCE 773 0- Wireless Personal Communications Springer US; http://www.springer-ny.com 72/4(2013-10-01), 2481-2497 0929-6212 72:4<2481 2013 72 11277 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer