Method and apparatus for performing soft hand-off in a wireless communication system
US6055428A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 21, 1997 |
| Grant date | Apr 25, 2000 |
| Priority date | — |
| Expiry date | Jul 21, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W36/18
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
At the mobile station the measured pilot energy of each pilot in the candidate set is iteratively compared against a threshold generated in accordance with the sum of the energies of the pilots in the active set. If the strongest pilot in the candidate set satisfies this threshold condition, it is added to the revised active set. A second iterative process is performed to determine whether a pilot should be deleted from the revised active set. The mobile station determines whether a change to the current active set is desirable by measuring the energies of the pilots in the active set and the candidate set, and dynamically adjusting the necessary thresholds based on its own estimation of the communication environment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.