Method, mobile station, basestation and mobile communications system for performing handoff independently for groups of physical direct sequence-code division multiple access channels
US6590879B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 5, 1999 |
| Grant date | Jul 8, 2003 |
| Priority date | — |
| Expiry date | Mar 5, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W36/28
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A mobile station is disclosed that functions within a 3G DS-CDMA communication system, in which a separate active set is defined for each of the different channel types. With the use of a separate Fundamental Channel Active Set, Forward Link-Supplemental Channel Active Set, Reverse Link-Supplemental Channel Active Set, and Dedicated Control Channel Active Set a flexible handoff of a multi-service active session is possible. Each type of channel is capable of handing off separately, thereby allowing channels with different requirements, such as resource requirements or signal strength requirements, to be handed off at different times, to different basestations, and/or in different methods (ie. soft or hard handoff). The handoffs are initiated by a basestation controller by updating, within the mobile station and the applicable basestations, the particular active set corresponding to the physical channel requiring a handoff.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.