Distributed core selection with QoS support

Core-based routing with quality of service (QoS) support is essential in facilitating multi-sender multimedia multicast applications such as video conferencing and virtual collaboration applications. In this paper, we introduce a new distributed core selection protocol that has the following desirable properties. First, the protocol utilizes a new distributed primary core selection algorithm that selects as many primary cores per multicast group as necessary, to maximize the number of group members with satisfied QoS requirements. Second, the protocol is distributed, preventing a single router from becoming a hot spot and a single point of failure during core selection. Lastly, the protocol employs a distributed backup core selection algorithm to provide quick recovery should some primary cores fail. Our analytical experiments show that the proposed protocol significantly satisfies more group members with noticeably less communication overhead than a recent core selection algorithm with QoS support using a single core.