Dispatch network and IMS integration with centralized event notification server
First Claim
1. A communications network, comprising:
- a plurality of dispatch application servers (DAS);
a serving call session control function (S-CSCF) device located in a first IP multimedia subsystem (IMS) core, the S-CSCF device adapted to;
receive an IMS registration request from a subscriber unit;
authenticate said IMS registration request;
send an IMS registration confirmation to said subscriber unit; and
send a notification indicating said IMS registration to an event notification server; and
an event notification server coupled to the S-CSCF device, coupled to another S-CSCF device located in a second IMS core, and coupled to the plurality of dispatch application servers, the event notification server adapted to;
receive said registration notification from said S-CSCF device;
select from among one of said plurality of dispatch application servers (DAS) a first DAS associated with the first IMS core or a second DAS associated with the second IMS core based on information related to the location domain, location and address associated with said subscriber unit in said registration notification; and
send an assignment notification to said selected dispatch application server (DAS) indicating an assignment to provide dispatch service to said subscriber unit;
wherein said event notification server is adapted to use a look up table to determine said selected dispatch application server based on said location domain, location and address information.
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Accused Products
Abstract
Several embodiments of an IMS communications network are disclosed. In one embodiment, the network comprises a plurality of dispatch application servers (DAS), an S-CSCF, and an event notification server. The S-CSCF is adapted to receive an IMS registration request from a dispatch client, authenticate the registration request, send a registration confirmation to the dispatch client, and send a notification indicating the registration of the dispatch client to an event notification server. The event notification server is adapted to receive the notification from the S-CSCF, select a DAS, and send a notification to the selected DAS indicating an assignment to provide dispatch service to the dispatch client. In another embodiment, the registration notification to the event notification server is sent from the dispatch client, instead of the S-CSCF.
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Citations
21 Claims
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1. A communications network, comprising:
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a plurality of dispatch application servers (DAS); a serving call session control function (S-CSCF) device located in a first IP multimedia subsystem (IMS) core, the S-CSCF device adapted to; receive an IMS registration request from a subscriber unit; authenticate said IMS registration request; send an IMS registration confirmation to said subscriber unit; and send a notification indicating said IMS registration to an event notification server; and an event notification server coupled to the S-CSCF device, coupled to another S-CSCF device located in a second IMS core, and coupled to the plurality of dispatch application servers, the event notification server adapted to; receive said registration notification from said S-CSCF device; select from among one of said plurality of dispatch application servers (DAS) a first DAS associated with the first IMS core or a second DAS associated with the second IMS core based on information related to the location domain, location and address associated with said subscriber unit in said registration notification; and send an assignment notification to said selected dispatch application server (DAS) indicating an assignment to provide dispatch service to said subscriber unit; wherein said event notification server is adapted to use a look up table to determine said selected dispatch application server based on said location domain, location and address information. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A communications network, comprising;
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a plurality of dispatch application servers (DAS); a serving call session control function (S-CSCF) device located in a first IP multimedia subsystem (IMS) core, the S-CSCF device adapted to; receive an IMS registration request from a subscriber unit; authenticate said IMS registration request; and send an IMS registration confirmation to said subscriber unit; and an event notification server coupled to the S-CSCF device, coupled to another S-CSCF device located in a second IMS core, and coupled to the plurality of dispatch application servers, the event notification server adapted to; receive a registration notification indicating said IMS registration from said subscriber unit; select from among said plurality of dispatch application servers (DAS) a first DAS associated with the first IMS core and a second DAS associated with the second IMS core based on information related to the location domain, location and address associated with said subscriber unit in said registration notification; and send an assignment notification to said selected dispatch application server (DAS) indicating an assignment to provide dispatch service to said subscriber unit; wherein said event notification server is adapted to use a look up table to determine said selected dispatch application server based on said location domain, location and address information. - View Dependent Claims (13, 14, 15)
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16. An event notification server adapted to interface with an IP multimedia subsystem (IMS) network, comprising:
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a network interface; and a processor adapted to; receive a notification of a registration or re-registration of a subscriber unit via said network interface; select a first dispatch application server (DAS) associated with a first IMS core or a second DAS associated with a second IMS core from among a plurality of dispatch application servers based on information related to the location domain, location and address associated with said subscriber unit in said registration or re-registration notification, and send an assignment notification to said selected first or second dispatch application server (DAS) via said network interface, indicating an assignment to provide dispatch service to said subscriber unit; wherein the event notification server is coupled to a serving call session control function (S-CSCF) device located in the first IMS core, coupled to another S-CSCF device located in the second IMS core, and coupled to the plurality of dispatch application servers; wherein said event notification server is adapted to use a look up table to determine said selected dispatch application server based on said location domain, location and address information. - View Dependent Claims (17, 18, 19)
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20. A serving call session control function (S-CSCF) device located in a first IP multimedia subsystem (IMS) core, comprising:
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a network interface; and a processor adapted to; receive an IMS registration or re-registration request from a subscriber unit;
authenticate said IMS registration or re-registration request; andsend a notification indicating said registration or re-registration of said subscriber unit to an event notification server, wherein said notification comprises information related to the location domain, location and address associated with said subscriber unit from which said event notification server is to assign a first dispatch application server associated with the first IMS core or a second dispatch application server associated with a second IMS core to provide dispatch service to said subscriber unit, wherein the S-CSCF device is coupled to the event notification server which is coupled to another S-CSCF device located in the second IMS core and to a plurality of dispatch application servers; wherein said event notification server is adapted to use a look up table to determine said selected dispatch application server based on said location domain, location and address information. - View Dependent Claims (21)
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Specification