Short-range RF access point design enabling services to master and slave mobile devices
US6795421B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 12, 2002 |
| Grant date | Sep 21, 2004 |
| Priority date | — |
| Expiry date | Jan 23, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W84/18
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A short-range RF access point contains two Bluetooth devices. The first device is programmed to remain a master device. The second device is programmed to remain a scanning slave device. The two devices are connected to exchange clock, address, and synchronization information. The access point master device transmits inquiry and paging packets and establishes connections with potential slave devices that respond to inquiries from the master device. The master device's clock is the piconet clock for the resulting connections. The access point slave device primarily remains in an inquiry scanning mode, searching for inquiry packets from mobile devices that are potential master devices. When the access point slave device receives the inquiry packets and paging packets from a mobile device, it then passes control to the access point master device. Several embodiments are disclosed for passing control from the access point slave to the access point master.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.