We use cookies to distinguish you from other users and to provide you with a better experience on our websites. Close this message to accept cookies or find out how to manage your cookie settings.
We use cookies to distinguish you from other users and to provide you with a better experience on our websites. Close this message to accept cookies or find out how to manage your cookie settings.
from Part V - Fixed Wireless Cellular Mobile Networks Convergence: Standardized Networking Solutions
Published online by Cambridge University Press: 21 August 2009
What is the IP-based Multimedia Subsystem?
The IP-based Multimedia Subsystem (IMS) is the Next Generation Network (NGN) architecture, set of components, and interface specifications that allow convergence of wired and wireless networks. Convergence/integration of fixed and mobile wireless networks, the subject of this book, is part of the broader convergence just defined. The IMS convergent network will emerge from an Internet Protocol (IP)-based network infrastructure and a common service platform, allowing the development of a large array of telecommunications and multimedia applications. IMS is a user/operator-centric architectural framework that shifts much of its intelligence to the network periphery. Users of IMS services will benefit because of full mobility and service transparency across all networks.
IMS development was initiated in 1999 by a group of leading mobile service providers in conjunction with the promotion of future generations of mobile networks. This work was taken over by the 3G Partnership Project (3GPP) and presented for the first time in 3GPP Release 5 (3GPP R5) specifications. Release 5 was augmented by the addition, in Release 6 (3GPP R6), of the Internet Engineering Task Force (IETF) Session Initiation Protocol (SIP). In 3GPP Release 7, IMS incorporated the NGN concepts promoted by the European Telecommunications Standard Institute's (ETSI) Telecommunications and Internet Converged Services and Protocols for Advanced Networking (TISPAN) division. Also, the mobile networks support for IMS was extended from GSM/UMTS to CDMA2000 through 3GPP2 working specifications.
To save this book to your Kindle, first ensure [email protected] is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about saving to your Kindle.
Note you can select to save to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be saved to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.
Find out more about the Kindle Personal Document Service.
To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Dropbox.
To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.
