Call control method between a packet network and PSTNs in the next generation network
US7170888B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 13, 2002 |
| Grant date | Jan 30, 2007 |
| Priority date | — |
| Expiry date | Apr 13, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q2213/13216
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a call control method between a packet network and Public Switched Telephone Networks (PSTNs) in the next generation network, which enables a terminating media gateway controller to conduct the virtual Continuity (COT) check in processing ISDN User Part (ISUP) calls for the inter-operation of the packet network and the PSTNs. In particular, according to the present invention, for the inter-operation of a packet network and PSTNs, the terminating media gateway controller seizes the trunk at the time when it receives an IAM from an originating media gateway controller and transits the IAM to a terminating PSTN. At this time, the Continuity Check Indicator (CCI) code of Nature of Connection Indicators (NCI) parameter within the IAM is set as ‘Continuity Check Performed on a Previous Circuit.’ When the bearer connection set-up is completed, the Continuity Indicator (CI) code of CI parameter within the COT message is set as ‘Continuity Check Successful,’ and then the COT message is transmitted to the terminating PSTN. Thus, the terminating subscriber is seized at the time when the packet network's bearer set-up has been completed. Consequently, the packe…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.