Method for continuous home public land mobile network search
US6567663B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 11, 1999 |
| Grant date | May 20, 2003 |
| Priority date | — |
| Expiry date | Jun 11, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02D30/70
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
In a mobile station (MS) of a cellular radiotelephone system, a method of searching for the MS's home public land mobile network (HPLMN) when the MS is camped on a non-HPLMN. The method is performed in thirty second intervals while the MS is already in its receive ready (higher current-drawing) state. The method performs strategic measurements of the receive signal level in order to determine if it is likely that the HPLMN has become available again. If the probability is high that the HPLMN has become available, further data is gathered on the likely available channel. Once the channel is identified, the MS begins the camping procedure to register on the HPLMN.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.