Abstract
The 3rd Generation Partnership Project (3GPP) has proposed the IP Multimedia Subsystem (IMS) as a key element in the next-generation network (NGN) converged architecture supporting multimedia services. Extending the IMS towards provisioning support for location based services (LBS) will enable enhanced services and offer new revenues to the system. However, conveying location information in the IMS and connecting the IMS with a real positioning system are still open issues. This paper presents the design and implementation of an IMS Location Server (ILS) integrating IMS with a positioning system. From the IMS perspective, the ILS serves as a service enabler for LBS. Considerable work has been done by the IETF in the area of location information transport based on the Session Initiation Protocol (SIP). This paper proposes some improvements in this area. In order to demonstrate proof-of-concept in enhancing IMS-based services, a Location-aware Push-to-Talk (LaPoC) prototype service has been developed. The service has been integrated and tested with the Ericsson Mobile Positioning System (MPS). The paper also gives the results of performance measurements including traffic load analysis and session establishment time.
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References
3GPP TS 23.228: IP Multimedia Subsystem (IMS); Stage 2. Rel. 7, 2005-06 (2005)
3GPP TS 23.271: Functional stage 2 description of Location Services (LCS). Release 7, 2005-03 (2005)
Open Mobile Alliance OMA-AD_PoC-V1_0-20051104-C: Push to talk over Cellular (PoC) - Architecture. Candidate Version 1.0 (November 2005)
Open Mobile Alliance OMA-LIF-MLP-V3_1-20040316-C: Mobile Location Protocol (MLP). Candidate Version 3.1 (March 2004)
OpenGIS: Open Geography Markup Language (GML) Implementation Specification. OGC 02-023r4 (January 2003), http://www.opengis.org/techno/implementation.htm
Ericsson Corp: About IMS and Push-to-talk over Cellular (January 2006), Accessed at: http://www.ericsson.com/mobilityworld/sub/open/index.html
Ericsson Corp: Mobile Positioning System (January 2006), Accessed at: http://www.ericsson.com/mobilityworld/sub/open/index.html
Camarillo, G., Garcia-Martin, M.: The 3G IP Multimedia Subsystem: Merging the Internet and the Cellular Worlds. John Wiley and Sons, Ltd., England (2004)
Filjar, R., Huljenic, D., Desic, S.: Distributed Positioning: A Network-based Method for Satellite Positioning Performance Improvement. Journal of Navigation 55(3), 477–484 (2002)
Filjar, R., Desic, S., Trzec, K.: LBS Reference Model. In: Proc. of NAV 2004 Conference, Westminster, London, UK (2004) (on CD-ROM)
Mahy, R.: A Document Format for Filtering and Reporting Location Notications in PIDF-LO. draft-mahy-geopriv-loc-filters-00.txt, Internet Draft, October 2005, work in progress (2005)
Peterson, J.: A Presence-based GEOPRIV Location Object Format. IETF RFC 4119 (December 2005)
Polk, J.M., Rosen, B.: Session Initiation Protocol Location Conveyance. draft-ietf-sip-location-conveyance-01.txt, Internet Draft, July 2005, work in progress (2005)
Roach, A.B.: Session Initiation Protocol (SIP)-Specific Event Notification. IETF RFC 3265 (June 2002)
Rosenberg, J., et al.: SIP: Session Initiation Protocol. IETF RFC 3261 (June 2002)
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© 2006 Springer-Verlag Berlin Heidelberg
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Mosmondor, M., Skorin-Kapov, L., Filjar, R. (2006). Location Conveyance in the IP Multimedia Subsystem. In: Koucheryavy, Y., Harju, J., Iversen, V.B. (eds) Next Generation Teletraffic and Wired/Wireless Advanced Networking. NEW2AN 2006. Lecture Notes in Computer Science, vol 4003. Springer, Berlin, Heidelberg. https://doi.org/10.1007/11759355_11
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DOI: https://doi.org/10.1007/11759355_11
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-34429-2
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