The services that are enabled by SIP are equally applicable in the world of mobile. A prime example is presence: a user registers their location with a SIP server and the server then knows if the user is available and where the user can be found. Location could be home, work or mobile. The mobile component, then, is crucial if services are to be portable across platforms.

 

As mobile networks evolve, they are becoming more concerned with data and are consequently increasingly IP-centric. With this use of IP comes SIP.

 

Two major technologies that impact these developments are:

 

For more information on the services that are likely to appear, see the Mobile world Page in the Showcase section.

 

The 3G IP Multimedia Subsystem: Merging the Internet and the Cellular Worlds 
Gonzalo Camarillo, Miguel-Angel Garcia-Martin

WCDMA, CDMA2000 and UMTS were developed with a primary goal in mind: delivering new services to the end users, and thus, new revenue opportunities for the operators.  IMS is seen as one of the key multimedia enablers towards providing such services and, therefore, a thorough knowledge of IMS equates to an understanding of why we need 3G and how it will provide enriched end user services.  With the standardisation of the first phase of IMS completed in June 2003, the first 3G networks supporting IMS are expected to be commercially deployed during 2004.

The 3G IP Multimedia Subsystem:

• Covers the hot topic of IMS which will provide multimedia Internet services to mobile wireless users
• Presents a high level overview of IMS
• Explains how the IMS system which covers all the existing capabilities of voice, data and messaging, will also facilitate new media services such as video or high quality audio to be set up between two or more users
• Includes extensive figures showing network architectures, message flows, protocol operations and photographs of 3G equipment
• Authored by two systems experts based at Ericsson this title will have instant appeal to a wide range of readers, from mobile phone vendors and network manufactures to mobile operators, ISPs and third party service providers.
• Order from Amazon.com >>>

 

 

 

Leveraging the Session Initiation Protocol (SIP) Application Server for Rapid Service Creation

 

Abstract: This paper describes the key trends that are driving the mobile communications industry as it transitions from voice-centric 2G networks to multi-service data oriented 3G networks. We examine the major challenges facing mobile carriers and take a look at several examples of new service rollouts to see how carriers are addressing these challenges. We discuss the steps carriers need to take to be successful in the emerging 3G mobile environment; and we describe how a new software technology, the SIP Application Server, facilitates this success by allowing carriers to develop and deploy new applications quickly and cost effectively.

 

 

M D Cookson and D G Smith
BT Technol J Vol 19 No 1 January 2001

 

The huge investment in 3G mobile licences is an incentive to develop extra services above and beyond basic telephony and data services. Service control provides an infrastructure to deliver services, particularly those of a real-time nature. This paper focuses on the progress in developing service control in the context of the 3GPP Release 4/5 network. To achieve the objectives for service evolution, mass service development and cost-effective services, three

technologies are being pursued for service control. These are CAMEL, APIs and SIP service extensions.

 

 

M C Bale

 

Voice telephony is the predominant service on today's cellular mobile networks, in terms of number of customers, revenues and network usage. However, it is difficult to predict how long this will be the case given the rising demand for new Internet multimedia services. It is therefore essential that 3rd generation (3G) mobile networks support a voice telephony service, but also that these networks are also capable of providing Internet multimedia services using the same technology.

 

This paper provides an overview of how voice telephony is provided in the initial phase of the universal mobile telecommunications system (UMTS). It then describes how this is expected to evolve in later phases - so that voice telephony becomes one of a large number of multimedia services provided from a common Internet protocol-based mobile network.

 

 IMS Converged Services Gateway >>>

The IP Multimedia Subsystem (IMS) offers a SIP service delivery architecture that is abstracted from the underlying access network. The IMS enables service convergence and true mobility across wireless, wireline, and WiFi networks. Converged Services Gateways bridge the gap between 2.5G wireless networks and the emerging IMS services architecture.  

 SIP to TCAP Gateway >>> 

Next generation networks that are deployed using SIP need a simple way to access SS7 databases in order to offer comparable services to the incumbent fixed and wireless network operators. Signalware offers an integrated development platform for delivering SIP to TCAP gateway functionality. Signalware, SIP, and SS7 protocols can be combined to offer a gateway application on open Solaris® or LinuxTM based server platforms.