Performance analysis of application-level multicast routing algorithms for supporting multipoint interaction synchronization

Multipoint Video Conferencing (MVC) where multiple participants can be simultaneous sources of video requires low-delay, low packet loss and multipoint interaction synchronization. However, the synchronization issue is ignored by existing application-level multicast schemes and usually, it is addressed by a dedicated synchronizing controller at each peer. The controller needs to implement complicated time-consuming operations to synchronize multiple interactive media streams. Unlike the existing application-level multicast schemes, this paper introduces an idea that the synchronization problem is solved in the process of application-level multicast routing, without using the dedicated synchronizing controller. Furthermore, the low-delay multicast communication is achieved on base of the idea. The contributions of this paper include: 1.the concept that application-level multicast routing algorithms support multipoint interaction synchronization is defined by us; 2.an effective lowdelay multicast routing algorithm that supports multipoint interaction synchronization is proposed; 3.performance analysis of our algorithm and the existing similar algorithm is carried out. Finally, simulation experiments demonstrate our algorithm is correct and effective.