Method and system for calculating a local time for a user equipment in an intelligent network
US8116257B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 20, 2008 |
| Grant date | Feb 14, 2012 |
| Priority date | — |
| Expiry date | Nov 14, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W4/029
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method of calculating local time, in an intelligent network, of a subscriber's User Equipment (UE), determines whether a call originates or terminates with the UE, the UTC offset and DST observance indicator for the (G)MSC signaling the intelligent network, and a determination is of whether the UE is in a Problem Area cell site. If the UE is in a Problem Area cell site, the received time and Coordinated Universal Time (UTC) Offset is corrected. A Cell Global Identity (CGI) is used to lookup the UTC Offset and a Daylight Saving Time (DST) observance indicator for the Cell Site. For calls terminating with the UE, if the UE is not in a Problem Area cell site, the VLR serving the UE is used to lookup the UTC offset and DST observance indicator for the subscriber. A time zone delta is applied to the call time of day and the UTC Offset and if DST is in effect, and there is a difference of DST between an MSC serving the UE and the location associated with the UE, a DST delta is applied to call time of day.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.