Deep sleep mode for portable communication device
US7546149B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 8, 2005 |
| Grant date | Jun 9, 2009 |
| Priority date | — |
| Expiry date | Oct 2, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02D30/70
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A portable communication device (100) is provided with first transceiver circuitry (104) for sending and receiving signals on a first communication path and second transceiver circuitry (116) for sending and receiving signals on a second communication path. The portable communication device (100) also includes a controller (112) coupled to the first transceiver circuitry (104) and the second transceiver circuitry (116) for providing a deregistration message to the second transceiver circuitry (116) for transmission therefrom in response to determining that the portable communication device (100) is within signal coverage of the first communication path, activating the first transceiver circuitry (104) to send and receive signals on the first communication path, deactivating the second transceiver circuitry (116), and thereafter activating the second transceiver circuitry (116) at times separated by a predetermined time interval to monitor at least one housekeeping channel of the second communication path.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.