Failover, load sharing and server architecture in SIP telephony
Computer Communications
Enhancing the Scalability of IMS-Based Presence Service for LBS Applications
COMPSAC '09 Proceedings of the 2009 33rd Annual IEEE International Computer Software and Applications Conference - Volume 01
Performance evaluation of SIP-based multimedia services in UMTS
Computer Networks: The International Journal of Computer and Telecommunications Networking - Selected papers from the European wireless 2004 conference
A weakly consistent scheme for IMS presence service
IEEE Transactions on Wireless Communications
IEEE Wireless Communications - Special issue title on applications and support technical for mobility and enterprise services
A token-bucket based notification traffic control mechanism for IMS presence service
Computer Communications
IP multimedia subsystems in 3GPP and 3GPP2: overview and scalability issues
IEEE Communications Magazine
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Presence information was the key enabler of the great success of instant messaging applications. This information was first limited to simple binary states such as online, offline, or busy. However, it is currently evolving towards a much more generic, flexible concept that includes all context that enables users or applications to adapt and control communications in a more efficient, personalized manner. Presence paves the way for the deployment of advanced communication services and is therefore a key component in Next-Generation Networks. The main barrier to the implantation of next-generation presence-based services is the great amount of traffic involved in the distribution of presence information across domains. In this paper, we give a deep insight into multiple strategies for reducing inter-domain presence traffic. We estimate the capacity demands of these strategies on the IMS servers. Moreover, we enhance two strategies for reducing presence load: Common Subscribe and Federated Common Subscribe. Not only do the proposed enhancements prevent the disclosure of some privacy, they also save presence traffic.