IP multimedia subsystems in 3GPP and 3GPP2: Overview and scalability issues

Prathima Agrawal*, Jui Hung Yeh, Jyh-Cheng Chen, Tao Zhang

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

55 Scopus citations


The Internet has experienced tremendous expansion in the past several years. Demands for IP multimedia services are emerging. The thirdgeneration (3G) wireless networks aim to support mobile users with numerous Internet services. 3G standards organizations are developing IP multimedia subsystems (IMS) to achieve seamless integration between Internet and 3G networks. Moreover, the collaboration between IETF, 3GPP, and 3GPP2 is essential to the development of IMS for next-generation networks. This article first provides an overview of 3GPP and 3GPP2 IMS and illustrates the IMS requirements, architectures, and functional models. We then discuss potential scalability issues in IMS. This article provides guidance for constructing a robust and scalable IMS.

Original languageEnglish
Pages (from-to)138-145
Number of pages8
JournalIEEE Communications Magazine
Issue number1
StatePublished - 1 Jan 2008

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