Gatewa router romobility tworks Typically a handoff event can cause packet losses when the processing of a flow request via a new base station is delayed. In this situation, some packets might be discarded, and thereby overall quality of the ongoing flow might be degraded significantly.
In this paper, the make-before-break handover method is basically considered in order to reduce the SIP (session initiation protocol) session restoration delay due to the interface switching during WiFi-to-3G vertical handover under IMS (IP multimedia subsystem). Actually, the session restoration delay in WiFi-to-3G handover scenario can be dramatically… (More)
In DiffServ-enabled mobile network systems, TCP sender may time out if packet loss occurs at handover event. Thus, TCP window size may be reduced temporarily due to packet loss. Under overloaded traffic situation in local IP-managed network right after handover, furthermore, the sending rate of TCP packets that a mobile host generates may not be enough to… (More)