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Scalability improvement of the real time control protocol

El-Marakby, Randa and Hutchison, David (2005) Scalability improvement of the real time control protocol. Computer Communications, 28 (2). pp. 136-149. ISSN 0140-3664

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Abstract

Scalability problems arise when the Real Time Control Protocol (RTCP), which is the control protocol of the Real-time Transport Protocol (RTP), is used in large multicast groups. The problems include: increased feedback delay, increased storage state at every member, and ineffective RTCP bandwidth usage. We have designed a Scalable RTCP (S-RTCP) which is based on a hierarchical structure in which members are grouped into local regions. For every region, there is an Aggregator (AG) which receives the feedback Receiver Reports (RRs) sent by its local members. The AG summarizes important information in the RRs, derives some statistics, and sends them to a Manager. The Manager performs additional statistical analysis to monitor the transmission quality and to identify regions suffering massively from congestion. A simulation of S-RTCP using the Network Simulator (NS) showed that S-RTCP alleviates some of the RTCP scalability problems and makes effective use of RRs. Consequently, the feedback provides timely and useful QoS information required for network monitors and for adaptive applications. Details of the simulations and performance analysis are presented and described which show the advantages of using S-RTCP over the original RTCP.

Item Type: Article
Journal or Publication Title: Computer Communications
Uncontrolled Keywords: Real-time transport protocol (RTP) ; Real time control protocol (RTCP) ; Scalability
Subjects: Q Science > QA Mathematics > QA75 Electronic computers. Computer science
Departments: Faculty of Science and Technology > School of Computing & Communications
ID Code: 56832
Deposited By: ep_importer_pure
Deposited On: 24 Aug 2012 11:17
Refereed?: Yes
Published?: Published
Last Modified: 07 Jan 2013 16:56
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/56832

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