Method and apparatus for supporting a soft handoff by establishing a cell set used to facilitate antenna beam mode transitions in a mobile station
US7079843B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 24, 2004 |
| Grant date | Jul 18, 2006 |
| Priority date | — |
| Expiry date | Sep 24, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W88/06
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for establishing a set of cells used to support a soft handoff. The apparatus is used in a wireless communication system including a plurality of cells and at least one wireless transmit/receive unit (WTRU) having at least one beam antenna which is configured to transition between a switch beam mode and an omni-directional beam mode. The WTRU communicates with a serving cell while the beam antenna is in the switch beam mode. The WTRU performs measurements on cells neighboring the serving cell to determine measurement results associated with the cells. The WTRU then determines whether each of the measurement results exceeds a predetermined threshold. A set of cells associated with the measurement results that exceed the predetermined threshold is established. If the number of cells in the set reaches a predetermined number, the beam antenna transitions from the switch beam mode to the omni-directional beam mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.