An improved handoff scheme using SIP for time-shifted service in heterogeneous network

Lin Xiao¹, Jun Liang²

COMPUTER MODELLING & NEW TECHNOLOGIES 2014 18(12B) 375-382

¹College of Applied Science and Technology, Beijing Union University, Beijing, China

²Training Center of Electronic Information, Beijing Union University, Beijing, China,

Multimedia service is widely developed with the convergence of network, but it is sensitive to the data delay and packet loss introduced by mobility. The time-shifted service is a typical application in multimedia service. An improved application-layer handoff scheme using SIP is proposed in this paper to reduce the delay user experienced in time-shifted service under IMS architecture. The improved handoff scheme includes horizontal handoff and vertical handoff which supports terminal mobility and mode mobility in time-shifted service. Theoretical analysis and simulation results show the delay user experienced is greatly reduced by the improved handoff scheme which ensuresthe seamless experience for time-shifted service.