ABSTRACT
In this chapter, we describe the centralized multipoint multimedia conferencing systems architecture in RFC 5239. The centralized multipoint multimedia systems and protocols framework described in Section 1.5 assumes that the centralized controller is a black box. However, this chapter defines the logical conferencing systems and protocols between the entities that are described in subsequent chapters based on specific standards defining all the standardized logical functional entities of the controller itself. Specifically, this chapter outlines the following: First, more detail on the conference (data) objects; second, the constructs and identifiers that MUST be implemented to manage the conference objects, instances, and users associated with a conferencing system; third, how a conferencing system is logically built using the defined high-level data model and how the conference objects are maintained; fourth, definitions of the fundamental conferencing mechanisms and high-level overview of the protocols; fifth, realizations of various conferencing scenarios, detailing the manipulation of the conference objects using the defined protocols; Sixth, the relationship between this Centralized Conferencing Framework and the SIP Conferencing Framework; and finally, the security of the centralized conferencing system architecture.
