Call redirection for enterprise hosted dual mode service
First Claim
1. A method for routing incoming calls directed to a dual-mode device, the method comprising:
- updating a database in a VoIP based wireless local area network with routing information of the dual mode device in a wireless telecommunication network;
wherein the dual-mode device is identified by a single dialable address that is functional in either network, the single dialable address being mapped to a Session Initiation Protocol (SIP) address;
in response to an incoming call being routed to a VoIP based wireless local area network, an entity in the VoIP based wireless local area network querying the database to determine whether the dual-mode device is active and receiving calls in the VoIP based wireless local area network;
when the dual-mode device is determined to be operating in the VoIP based wireless local area network, using a SIP INVITE message to route the incoming call to the dual-mode device; and
when the dual-mode device is determined to be operating in the wireless telecommunication network, redirecting the incoming call to the wireless telecommunication network.
18 Assignments
0 Petitions
Accused Products
Abstract
Systems and methods provide a single E.164 number for voice and data call redirection and telephony services such as caller identification, regardless of in which type of network a dual mode mobile device operates. When the dual mode device registers and is active in a GSM network, temporary routing and status updates are triggered and resultant information is maintained in both networks. A mobile terminated call is routed through an enterprise WLAN with call control within the enterprise being handled by SIP or H.323 signaling, and the call is redirected to the mobile device in the GSM network, where call control is assumed by the SS7 network. Services are provided using the protocols native to the active network, and the single E.164 is used consistently along with or lieu of the temporary routing information for subscriber identity specific functions, such as caller identification and voice mail.
76 Citations
21 Claims
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1. A method for routing incoming calls directed to a dual-mode device, the method comprising:
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updating a database in a VoIP based wireless local area network with routing information of the dual mode device in a wireless telecommunication network; wherein the dual-mode device is identified by a single dialable address that is functional in either network, the single dialable address being mapped to a Session Initiation Protocol (SIP) address; in response to an incoming call being routed to a VoIP based wireless local area network, an entity in the VoIP based wireless local area network querying the database to determine whether the dual-mode device is active and receiving calls in the VoIP based wireless local area network; when the dual-mode device is determined to be operating in the VoIP based wireless local area network, using a SIP INVITE message to route the incoming call to the dual-mode device; and when the dual-mode device is determined to be operating in the wireless telecommunication network, redirecting the incoming call to the wireless telecommunication network. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A system for routing incoming calls directed to a dual-mode device, the system comprising:
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means for updating a database in a VoIP based wireless local area network with routing information of the dual mode device in a wireless telecommunication network; wherein the dual-mode device is identified by a single dialable address that is functional in either network, the single dialable address being mapped to a Session Initiation Protocol (SIP) address; means, responsive to an incoming call being routed to a VoIP based wireless local area network, for querying the database to determine whether the dual-mode device is active and receiving calls in the VoIP based wireless local area network; means, responsive to the dual-mode device being determined to be operating in the VoIP based wireless local area network, for using a SIP INVITE message to route the incoming call to the dual-mode device; and means, responsive to the dual-mode device being determined to be operating in the wireless telecommunication network, for redirecting the incoming call to the wireless telecommunication network.
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Specification