Electrical computers and digital processing systems: multicomput – Computer-to-computer session/connection establishing
Reexamination Certificate
2004-09-15
2009-06-30
Vu, Viet (Department: 2454)
Electrical computers and digital processing systems: multicomput
Computer-to-computer session/connection establishing
C709S225000, C709S238000, C709S250000
Reexamination Certificate
active
07555555
ABSTRACT:
The SIP-based multimedia communication system for providing mobility using lifelong numbers provides mobility through SIP network service domains and a global domain. The SIP network service domain comprises a user agent and an SIP network server. The user agent transmits request/response messages between users to set up, correct, and cancel calls, and when contact information of the user agent is registered and registration of the contact information is cancelled, requests to be informed of state changes in registration information. The SIP network server performs message routing between user agents and informs the contact information of the user agents during message routing. The global domain manages the SIP network service domains and allocates global SIP identifiers, that is, lifelong numbers to users to provide user-centered mobility.
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“Application-Layer Mobility Using SIP”, H. Schulzzinne, et al., Service Portability and Virtual Customer Environments, 2000 IEEE, pp. 29-36.
Bahg Young-Jick
Kang Sook-Yang
Kim Kyung-Sook
Park Hyun-Seo
Blakely , Sokoloff, Taylor & Zafman LLP
Electronics & Telecommunications Research Institute
Vu Viet
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