A user-centric network communication broker for multimedia collaborative computing

Abstract

Abstract-The development of collaborative multimedia applications today follows a vertical development approach, which is a major inhibitor that drives up the cost of development and slows down the pace of innovation of new generations of collaborative applications. In this paper, we propose a network communication broker (NCB) that provides a unified higherlevel abstraction that encapsulates the complexity of networklevel communication control and media delivery for the class of multimedia collaborative applications. NCB expedites the development of next-generation applications with diverse communication logics. Furthermore, NCB-based applications can be easily ported to new network environments. In addition, the self-managing design of NCB supports dynamic adaptation in response to changes in network conditions and user requirements.

A Self-Configuring Communication Virtual Machine

“…We incorporated the open source JAIN SIP [10] implementation by NIST and also open source STUN implementation from Sip-communicator [11] project. More details of our prototype implementation can be found in [1,9].…”

“…Real-time multimedia transmission is achieved using RTP (Real-time Transport Protocol) [8]. More specific details about implementation can be found in [9]. B. Self-Configuration in NCB Self-configuration in NCB, to allow end-hosts behind different types of NAT, and communicate directly with each other is managed by the help of NetworkAddressManager module.…”

Supporting SIP-based end-to-end Data Distribution Service QoS in WANs

“…For example, [63] presented a network communication broker to enable per-class QoS for multimedia collaborative applications. Even if this network broker enhanced the QoS allocation by differentiating the traffic processing at the network edges, it supported neither mobility service management nor scalability since it adds complicated interfaces to both applications and middleware for the QoS notification.…”

CVM – A communication virtual machine

“…Each participant of a session can multicast to all the other participants. The NCB API (detailed in Zhang et al, 2006) to UCM is both application-and network-independent, through which high-level communication tasks can be specified. A new session is created by invoking the createSession call provided by NCB, with a session ID, which maintains a unique association between each user and network sessions.…”