Security is difficult to handle in multi-privileged group communications,because group users have multiple access privileges when subscribing different data streams.

Multi-privileged group communications are different from the traditional group communications.

The Design and Implementation of Multicast Communication Agent in an IP Phone System;

This paper focuses on the demand of IPv6 multimedia multicast communication,and proposes an IPv6 multicast communication scheme of flow label classification providing QoS using a hybrid approach.

Firstly,this paper analyzes the principle of clock synchronization in distributed system,introduces a synchronous algorithm based on UDP multicast communication in distributed system,and tests it practically,obtains good effect.

In order to solve broadcasting storm and large overhead of networks resource caused by distributed interactive simulation(DIS),HLA-RTI provided data distributed management service based on group communication.

As the unscalability of membership protocols used in the group communication, a new reliable membership protocol:randomized membership protocol (RMP) has been presented in this paper.

This paper surveys the achievements in the field of multicast security issues.

CBHRP protocol composes of cluster formation, unicast routing and multicast routing.

A wide variety of network applications require the use of reliable multicast protocols to disseminate data from one source to a potentially large number of receivers simultaneously.

Several key techniques of the system are discussed including network protocol,multicast communication,design of video decoder encoder and control module of Matrix Video Switcher.

The Ad hoc On-Demand Distance Vector(AODV) routing protocol is prevalent used in ad hoc network, it provides both unicast and multicast communication connectivity in an ad hoc mobile environment.

When multiple tree routes were selected as multicast communication solution, lower overall cost could be obtained to ensure network load balance.