Paging system with energy efficient station location
US5266945A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jan 15, 1991 |
| Grant date | Nov 30, 1993 |
| Priority date | — |
| Expiry date | Jan 15, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02D30/70
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method for searching for a station carrying paging data without unduly draining the paging receiver battery. If a station to which the receiver is presently tuned becomes unreliable, the pager scans among channels listed in a local channel list. If no paging data is received on these channels, the scanning among the local list channels may optionally proceed for a further interval at a slower rate. After it appears that paging data will not be found on channels listed in the local list, the pager begins a full spectrum search at a slow rate until it again finds a channel carrying paging data. By this arrangement, battery power is expended at a rate roughly in accordance with the likelihood of finding a paging station.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.