Systems and methods for intelligent inter-system handoff
US6829481B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 15, 2001 |
| Grant date | Dec 7, 2004 |
| Priority date | — |
| Expiry date | Jun 7, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W88/06
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A multi-mode mobile station performs an inter-system handoff between systems, qualified by the presence or absence of a preferred wireless communication network in a roaming lookup table stored and maintained in either mobile station memory or with the network controller. In one embodiment the accurate location of the mobile unit is determined by a global position fix, after which a coverage map is consulted to verify the availability of a preferred network before initiating a background scan. In other embodiments, a learning function creates habit profiles of a subscriber's regular behavior upon which the system intelligently initiates scanning for a preferred network.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.