Method and apparatus for determining a serving communication system where communication systems operate conjunctively
US5524278A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 6, 1992 |
| Grant date | Jun 4, 1996 |
| Priority date | — |
| Expiry date | Feb 6, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W48/16
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method and apparatus is provided for facilitating scanning of radio control channels where a plurality of communication systems conjunctively cover the same area. A subscriber unit receives an overhead message train on a control channel which includes a channel count representing the number of control channels of a communication system. Subsequently, the subscriber unit scans a channel count number of control channels to tune to a control channel being used by a communication system having coverage for the subscriber unit. This scanning of control channels starts with a predetermined start control channel which corresponds to the logical number of the control channel in a sequence of control channels which is after the channel count control channel. In addition, an apparatus may be provided to transmit, in the overhead message train, a subscriber unit control message with an address indicating that a communication system is operating within a coverage area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.