Automatic learning of wireless coverage
US5884163A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 23, 1996 |
| Grant date | Mar 16, 1999 |
| Priority date | — |
| Expiry date | Dec 23, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W24/00
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Using feedback by a system controller from wireless handsets to determine sub-areas which do not have coverage within a wireless telecommunication system. A system controller is responsive to the inability of a wireless handset to handoff to a base station, to record this fact, and requests that the wireless handset continue to monitor for a base station with sufficient transmission power. Note, the active call is lost when the handoff did not occur. When the wireless handset finds a base station that has sufficient transmission power on which to register, the wireless handset registers on this base station and sends a message to the system controller advising it of the failed handoff and the duration that occurred before a new base station was found. The system controller is responsive to this information to maintain a table for each base station from which a successful handoff could not be performed due to the lack of coverage. The system controller also instructs inactive wireless handsets to measure the transmission strength of base stations as the wireless handset moves from location to location. The wireless handset is responsive to the inability to detect a base station of s…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.