Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2006-01-24
2006-01-24
Tieu, Benny Q. (Department: 2642)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S439000, C370S331000
Reexamination Certificate
active
06990339
ABSTRACT:
The present invention relates to a system having a mobile host (1) which can attach to different access networks (3A,3B) for carrying on an active communications session with a correspondent host (2). The mobile host (1) has an identifier (NAI) which is independent of the access network (3A,3B) to which the mobile host (1) is attached, but is assigned a communication address(IP Address) for carrying on an active communications session with a correspondent host (2), which address changes for example depending on the access network (3A,3B) to which the mobile host (1) is attached. The system has a database (UNS User Name Service) which registers the association of the mobile host identifier (NAI) and the current communications address (IP address) of the mobile host (1). The correspondent host (2) is informed of the identifier (NAI) of the mobile host (1) when an active communications session is first established between the mobile host (1) and the correspondent host (2), and the correspondent host (2) accesses the database (UNS) to determine the current communications address of the mobile host (1). In accordance with the present invention, the mobile host (1) is engaged in an active communications session: detects when the communications address (IP address) of the mobile host (1) changes, for example as a result of attachment of the mobile host (1) to a different access network (3A,3B): and upon detection of such a change of the communications address (IP address), sends a message (HANDOVER MESSAGE) to the recorded correspondent host (2), the message containing the mobile host's (1) identifier (NAI). The correspondent host (2) then uses the identifier (NAI) to access the database (UNS) to obtain the changed communications address (IP address) of the mobile host (1). The invention also provides related methods and mobile hosts.
REFERENCES:
patent: 5457680 (1995-10-01), Kamm et al.
patent: 5930712 (1999-07-01), Byrne et al.
patent: 6473411 (2002-10-01), Kumaki et al.
patent: 6693886 (2004-02-01), Haikonen et al.
patent: 1 017 208 (2000-07-01), None
Henning Schulzrinne, et al., “Application-Layer Mobility Using SIP”, Mobile Computing and Communications Review, vol. 4, No. 3, pp. 47-57, Jul. 2000, ACM, New York, US.
Andras Valko, et al., “Cellular IP: A New Approach to Internet Host Mobility”, Computer Communication Review, Association for Computer Machinery, vol. 29, No. 1, pp. 50-65, Jan. 1999, New York, US.
Turányi Zoltán
Valkó András
Telefonaktiebolaget LM Ericsson (publ)
Tieu Benny Q.
LandOfFree
Mobility management for mobile hosts does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Mobility management for mobile hosts, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mobility management for mobile hosts will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3586904