Deep sleep mode for portable communication device
First Claim
1. A method for power conservation in a portable communication device capable of communication on either of a first communication path and a second communication path, the method comprising the steps of:
- detecting signals of a first communication path;
operating in a first communication mode on the first communication path;
monitoring at least one housekeeping channel on the second communication path at times separated by a predetermined time interval; and
switching operation from the first communication mode to a second communication mode on the second communication path in response to a predetermined event.
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Accused Products
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.
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Citations
23 Claims
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1. A method for power conservation in a portable communication device capable of communication on either of a first communication path and a second communication path, the method comprising the steps of:
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detecting signals of a first communication path;
operating in a first communication mode on the first communication path;
monitoring at least one housekeeping channel on the second communication path at times separated by a predetermined time interval; and
switching operation from the first communication mode to a second communication mode on the second communication path in response to a predetermined event. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A portable communication device comprising:
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first transceiver circuitry for sending and receiving signals on a first communication path;
second transceiver circuitry for sending and receiving signals on a second communication path; and
a controller coupled to the first transceiver circuitry and the second transceiver circuitry for providing a deregistration message to the second transceiver circuitry for transmission therefrom in response to determining that the portable communication device is within signal coverage of the first communication path, activating the first transceiver circuitry to send and receive signals on the first communication path, deactivating the second transceiver circuitry, and thereafter activating the second transceiver circuitry at times separated by a predetermined time interval to monitor at least one housekeeping channel of the second communication path. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22)
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23. A portable communication device for operating in a first communication mode on a wireless local area network communication path and for operating in a second communication mode on a CDMA communication path wherein the CDMA communication path includes a quick paging channel and a pilot channel, the portable communication device comprising:
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first transceiver circuitry for sending and receiving signals on the wireless local area network communication path;
second transceiver circuitry for sending and receiving signals on the CDMA communication path;
a user interface for receiving a user input indicating placing an emergency call and generating an emergency call signal in response thereto;
means for detecting if the device is at the limit of the signal coverage area of the wireless local area network communication path and generating a limit detected signal to the controller; and
a controller coupled to the first transceiver circuitry, the second transceiver circuitry, the user interface and the limit of signal coverage detector for (a) determining that the portable communication device is within signal coverage of the wireless local area network communication path in response to the limit detected signal, (b) activating the first transceiver circuitry to send and receive signals on the wireless local area network communication path, (c) providing a deregistration message to the second transceiver circuitry for transmission therefrom in response to determining that the portable communication device is within signal coverage of the wireless local area network communication path, (d) deactivating the second transceiver circuitry, (e) activating the second transceiver circuitry at times separated by a predetermined time interval to monitor at least one of the quick paging channel or the pilot channel of the CDMA communication path, the predetermined time interval corresponding to slot cycle indexes of the CDMA communication path that are equal to or greater than the slot cycle index used by the device when registered in CDMA, and (f) activating the second transceiver circuitry to operate in the second mode in response to one of the limit detected signal or the emergency call signal.
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Specification