SS7 mediation for data network call setup and services interworking
First Claim
1. A method of interworking Common Channel Signalling System Number 7 (CCS7) call control messages in a virtual CCS7 data node and setting up appropriate resources to initiate incoming calls into a data network, comprising the steps of:
- predefining a subset of CCS7 Integrated Services Digital Network (ISDN) User Part (ISUP) messages required for controlling setup of a data network call;
translating CCS7 call control messages into a set of primitives used by a network access server (NAS) and checking said set of primitives to authorize call origination;
predefining a set of primitives to exchange with the NAS;
exchanging primitives with the NAS for controlling setup of data network side transport resources; and
establishing NAS control of transport links between a public switched telephone network (PSTN) and said data network.
13 Assignments
0 Petitions
Accused Products
Abstract
In a data access transport service call setup from the Public Switched Telephony Network (PSTN) requires efficient utilization of PSTN resources and signalling infrastructure. A system is disclosed for interworking the PSTN Common Channel Signalling System Number 7 (CCS7) and Internet Protocol (IP) based data networks call setup protocols. The system provides efficient control of network-based signalling and control resources in support of PSTN originated IP-based data calls and services interworking between IP-based networks and other telecommunications networks. An architecture is provided allowing a flexible implementation and distribution of the interworking functions, including functional distribution between an CCS7 interworking function, network controller, Network Access Server, and existing telecommunications network interfaces.
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Citations
19 Claims
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1. A method of interworking Common Channel Signalling System Number 7 (CCS7) call control messages in a virtual CCS7 data node and setting up appropriate resources to initiate incoming calls into a data network, comprising the steps of:
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predefining a subset of CCS7 Integrated Services Digital Network (ISDN) User Part (ISUP) messages required for controlling setup of a data network call; translating CCS7 call control messages into a set of primitives used by a network access server (NAS) and checking said set of primitives to authorize call origination; predefining a set of primitives to exchange with the NAS; exchanging primitives with the NAS for controlling setup of data network side transport resources; and establishing NAS control of transport links between a public switched telephone network (PSTN) and said data network. - View Dependent Claims (2, 3)
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4. A method of interworking Common Channel Signalling System Number 7 (CCS7) call control messages in a virtual CCS7 data node to terminate calls which were initiated into a data network, comprising the steps of:
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predefining a subset of CCS7 Integrated Services Digital Network (ISDN) User Part (ISUP) messages required for controlling setup and teardown of a data network call; translating CCS7 call control messages into a set of primitives used by a network controller and network access server; predefining a second set of primitives to exchange with the network access server; exchanging said second set of primitives with the network access server to control release of data network side transport resources; and updating network controller resident data structures to release the call. - View Dependent Claims (5, 6, 7)
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8. An architecture for interworking a public switched telephone network and a data network comprising:
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a data network having a network controller and a network access server; and a means for interworking the public switched telephone network and the data network, said interworking means coupled to the network controller, the data network and a signalling system associated with the public switched telephone network, said interworking means effecting connection from the public switched telephone network to the data network using the signalling system. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method of interworking Common Channel Signalling System Number 7 (CCS7) call control messages in a virtual CCS7 data node and setting up appropriate resources to initiate incoming calls into a data network, comprising the steps of:
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predefining a subset of CCS7 Integrated Services Digital Network (ISDN) User Part (ISUP) messages required for controlling setup of a data network call; translating CCS7 call control messages into a set of primitives used by a network controller checking said set of primitives to authorize call origination; predefining a set of primitives to exchange with the network controller; exchanging primitives with the network controller for controlling setup of data network side transport resources; and establishing network control of transport links between a public switched telephone network (PSTN) and said data network. - View Dependent Claims (16, 17, 18)
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19. An architecture for interworking a public switched telephone network and a data network comprising:
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a data network having a network controller and a network access server; and a means for interworking the public switched telephone network and the data network, said interworking means coupled to the network controller, the data network and a signalling system associated with the public switched telephone network, said interworking means effecting connection from the public switched telephone network to the data network using the signalling system; and wherein a first control path exists from the network controller to the network access server for handling enhanced service processing, and a second control path exists from the interworking means to the network access server for handling signalling primitives.
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Specification