Voice call redirection for enterprise hosted dual mode service
First Claim
1. In an enterprise wireless local area network (WLAN), a method for redirecting an incoming call to a dual mode device, the method comprising:
- receiving, at a first subscriber database in the enterprise WLAN, a registration update indicating that the dual mode device is registered in a wireless telecom network, the registration update being received from a second subscriber database in the wireless telecom network in response to the dual mode device being registered with the wireless telecom network, and the registration update comprising temporary routing information used to route incoming calls received at the enterprise WLAN via an enterprise switching system to the dual mode device;
updating the first subscriber database with the temporary routing information, in response to receiving the registration update;
receiving, at the enterprise switching system, notification of an incoming call directed to the dual mode device;
retrieving the temporary routing information from the first subscriber database; and
connecting the incoming call to the dual mode device in the wireless telecom network using the temporary routing information.
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.
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Citations
15 Claims
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1. In an enterprise wireless local area network (WLAN), a method for redirecting an incoming call to a dual mode device, the method comprising:
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receiving, at a first subscriber database in the enterprise WLAN, a registration update indicating that the dual mode device is registered in a wireless telecom network, the registration update being received from a second subscriber database in the wireless telecom network in response to the dual mode device being registered with the wireless telecom network, and the registration update comprising temporary routing information used to route incoming calls received at the enterprise WLAN via an enterprise switching system to the dual mode device; updating the first subscriber database with the temporary routing information, in response to receiving the registration update; receiving, at the enterprise switching system, notification of an incoming call directed to the dual mode device; retrieving the temporary routing information from the first subscriber database; and connecting the incoming call to the dual mode device in the wireless telecom network using the temporary routing information. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for routing a mobile terminated call to a dual mode device, the method comprising:
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receiving a mobile terminated call at an enterprise switching center in an enterprise wireless local area network (WLAN), the enterprise switching center providing a gateway function for all mobile terminated calls; determining that the dual mode device is operating in a Public Land Mobile Network (PLMN); retrieving a temporary routing number from an enterprise subscriber record, the temporary routing number identifying the PLMN, and the temporary routing number having been previously received from the PLMN in response to the dual mode device registering in the PLMN; and routing the call to the PLMN using the temporary routing number.
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8. A method for providing a telephony service to a dual mode device operable in an enterprise wireless local area network (WLAN) and in a wireless telecom network, the method comprising:
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associating a single unique subscriber identifier with the dual mode device; provisioning the dual mode device in the enterprise WLAN by storing the subscriber identifier in a first subscriber record in a subscriber database associated with the enterprise WLAN; provisioning the dual mode device in the wireless telecom network by storing the subscriber identifier in a second subscriber record in a subscriber database associated with the wireless telecom network; in response to a request for the telephony service, determining, at an enterprise switching system, if the dual mode device is operating in the enterprise WLAN or the wireless telecom network; and if it is determined that the dual mode device is operating in the enterprise WLAN, retrieving the subscriber identifier from the first subscriber record and providing the telephony service according to a protocol used by the enterprise WLAN. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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Specification