Random access in mobile radio telephone systems
US5430760A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 4, 1994 |
| Grant date | Jul 4, 1995 |
| Priority date | — |
| Expiry date | Apr 4, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2201/709709
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The present invention includes a system and method for minimizing interference between two radio stations, e.g., a mobile radio telephone and a fixed base station, at the initiation of a radio communication. A mobile station initiates a random access at the lowest power level and increases the transmission power level until the base station detects the access signal. Once detected, the power level of the message is maintained at the detected level so that the signal interference is avoided. The present invention also provides a mechanism for synchronizing random access communications between mobile stations and the base station despite variation in distances between the mobile and base stations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.