Session Initiation Protocol (SIP) was designed from the bottom up to connect people and devices whenever and wherever they are in order to engage in a (possibly lengthy) exchange of information. Existing protocols, such as HTTP and SMTP, were not purpose-built for this essential human activity, and so SIP was ...Download Now
This paper is a technical overview of the Session Description Protocol and is designed for IT professionals, managers, and architects who want a quick low-level guide to the workings and details of the protocol. With the advent of protocols used to negotiate and define a communication session's parameters (e.g. Session ...Download Now
Nascent customer demand for multimedia services delivered anytime and anywhere is driving the acceptance and take-up of all-IP networks. Supporting this requirement demands high performance architectures and protocols, of which 3GPP's IP Multimedia Subsystem (IMS) is the most appropriate. This paper is an overview of the key technologies and architecture ...Download Now
The advent of all-IP-based cellular networks is likely to have a profound effect on the operation and capacity of those networks as well as presenting profit making opportunities to independent application developers. 3GPP's IP Multimedia Subsystem (IMS) is at the forefront of these developments. This paper describes the forces driving ...Download Now
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