Tailored power levels at handoff and call setup
US6654608B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 23, 1999 |
| Grant date | Nov 25, 2003 |
| Priority date | — |
| Expiry date | Dec 23, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W76/10
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Methods and apparatus for controlling the initial transmit power from a base station to a mobile station at call set-up and call handoff. The initial transmit power from a base station during a call set-up can be reduced from the conventional full power level by a sum of the hysteresis value for the cell which is handing off the mobile station and the hysteresis value for the cell which is receiving the mobile station. When a mobile station initiates or receives a call, the initial transmit power from a base station to the mobile station is reduced from the full power level by the hysteresis value for the hysteresis zone which surrounds the cell in which call set-up is to occur. The reduction in the initial power levels reduces interference caused to surrounding cells at the initiation of a call set-up or call handoff.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.