ABSTRACT
In voice activity based communication Choi et al show that using of mutual silence period to do the vertical
handover (VHO) is a perfect choice to minimize the packet loss. However according to their proposal, after
starting the VHO and before completing it, if one party breaks the silence pushing VoIP packets in channel, those
will be lost though those packets may contains significant even very worthy information. In this paper we have
shown that by using a small buffer, monitoring the VoIP packets at service disruption time, managing those in the
buffer and then sending packets from it after completing VHO until the buffer becomes empty. In our experiment
it was found that the proposed method improves the Choi et al’s proposal and prevents the packet losses
surprisingly.
Keywords: - VHO, voice activity, VoIP, SIP, service disruption, MSP.