Quality of Service Multipath Multicast Protocol.
Pierpaolo Baccichet, Elena Pagani, Gian Paolo Rossi · 2002
This paper reports the preliminary work on QoSMP [1], a multicast protocol for the Internet that supports QoS– sensitive routing. QoSMP has been designed to achieve a better usage of network resources. The primary trouble encountered in QoS multicast is the “false rejection” of join requests generated by the clients, when the network load is particularly high. The works described in [2], [3] and [4] may fail in serving the user properly, because they consider only one path returned from the underlying unicast protocol, without checking the existence of other alternative paths. QoSMP introduces an extended mechanism for finding feasible paths, that checks several alternatives within the same join request procedure. The QoSMP protocol also provides the possibility to reorganize the QoS requirements, without any disconnection from the group. This feature is useful in many applications like layered video, in which a user may change the desired quality of service at any time.