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http://dx.doi.org/10.7840/kics.2012.37B.12.1148

Supporting Service Continuity in Ubiquitous Network Environment with IMS Extension  

Yim, Jong-Choul (한국전자통신연구원 차세대통신연구부문 미래인터넷서비스연구부)
Bae, Hyun-Joo (한국전자통신연구원 차세대통신연구부문 미래인터넷서비스연구부)
Kim, Sang-Ha (충남대학교 컴퓨터공학과)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.37B, no.12, 2012 , pp. 1148-1159 More about this Journal
Abstract
It is of great significance in the NGN - which supports a ubiquitous network environment in which users can use multiple devices and all the devices are connected to networks - to support the terminal mobility as well as service continuity. The IMS architecture, which is considered as session control layer in the NGN, exists to support a wide range of advanced new services in addition to the traditional voice and data connectivity offerings of "old" telecommunications. The recent IMS specification also defines IUT (Inter UE Session Transfer) functionality in order to support service continuity in the NGN. However, service continuity in IMS has a limitation that two terminals involved in session transfer should belong to the same user. In this paper, we proposed a new device discovery mechanism for IMS and extended UEs with a few capabilities to overcome some of IMS's limitations. We also analysed how much overhead of the proposed method in terms of signaling cost will be.
Keywords
NGN; IMS; Service Continuity; Session Mobility;
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