System and methods in a dual mode wireless system for transmitting rescan command based on detected network conditions
US6456858B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 21, 1998 |
| Grant date | Sep 24, 2002 |
| Priority date | — |
| Expiry date | Dec 21, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W88/06
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A dual-mode wireless telephone communications system, having a digital wireless communications system (e.g., CDMA) and a second wireless communications system, selectively outputs a rescan command from the digital wireless system to at least one selected dual-mode wireless telephone. The digital wireless communications system outputs the rescan command based on a detected traffic condition in the digital wireless system. The rescan command, output to the selected dual-mode wireless telephone via a digital wireless signaling channel, instructs the selected dual-mode wireless telephone to register with an alternative wireless communications system (e.g., AMPS) when the dual-mode wireless telephone is in an idle state. Hence, the digital wireless system can selectively limit access to the CDMA system by dual-mode telephones using proactive rescan commands that avoid the necessity of hard handoff or call transfer procedures normally encountered when initiating a wireless telephone call on the digital wireless communications system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.