Patent ID: 8194634

Claim:
A telecommunication system for extending use of a directory number of a mobile station to a landline connection at a fixed location having a docking station, comprising: a wireless wide-area network (WWAN) for wirelessly handling calls of the mobile station, the WWAN including a plurality of mobile switching centers with associated visitor location registers (VLR), the WWAN including a home location register (HLR) storing a data records for mobile stations including a data record containing a profile corresponding to the mobile station, the data record including a VLR identifier indicating a last known location from which the mobile station was registered; a public switched telephone network (PS TN) including a bearer network and a signaling network, wherein the bearer network and signaling network are coupled to at least one mobile switching center; a packet-switched network exchanging packets using IP addressing; a docking station at a fixed location for interfacing with the mobile station when the mobile station is at the fixed location, the docking station being landline coupled to the packet-switched network and having a respective IP address, wherein the docking station or the mobile station implements a session initiation protocol (SIP) user agent when the mobile station is interfaced with the docking station; a media gateway coupled to the PSTN and the packet-switched network for converting media formats between the PSTN and the packet-switched network; and a call control system including 1) a session initiation protocol (SIP) server for creating a registration of the SIP user agent including the respective IP address of the docking station and the directory number of the mobile station, 2) a signaling gateway coupled to the signaling network for retrieving the data record from the HLR in response to the directory number, and 3) an IP VLR for storing at least a portion of the profile of the mobile station whenever the SIP user agent registers the mobile station at the docking station.