Spread spectrum cellular handoff method
US5164958A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 19, 1991 |
| Grant date | Nov 17, 1992 |
| Priority date | — |
| Expiry date | Jul 19, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J13/12
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method for handling off a transitioning-remote unit from a first microcell having a first base station communicating with a first plurality of remote units, to a second microcell having a second base station communicating with a second plurality of remote units. The first base station communicates to the first plurality of remote units using synchronous, code division multiple access at a first carrier frequency and a first power level. The second base station communicates simultaneously to the second plurality of remote units using synchronous, code division multiple access at a second carrier frequency and a second power level. The second power level is typically greater than the first power level. While the transitioning-remote unit transitions from first microcell to the second microcell, the second base station detects a power level of the remote-communications signal, exceeding a predetermined threshold, transmitted from the transitioning-mobile unit. The second base station signals to the first base station and to the transitioning-remote unit, to transfer the transitioning-remote unit to the second carrier frequency and a new chip codeword for communicating with the secon…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.