Methods and apparatus for reducing power consumption in CDMA communication device
First Claim
1. A method for use in reducing power consumption in a code division multiple access (CDMA) communication device having a transmitter which includes a power amplifier (PA), the method comprising the acts of:
- maintaining the CDMA communication device in a voice or a data call during which information is communicated over forward and reverse traffic channels set up with a base station;
in response to identifying that there is no information to transmit by the CDMA communication device;
during at least one portion of the voice or the data call, causing the transmitter to enter and be maintained in a low power state during which the PA is shut off while at least the reverse traffic channel is maintained by the base station; and
causing the transmitter to be exited from the low power state during the voice or the data call so that the PA is turned on again for resuming communications for the voice or the data call.
4 Assignments
0 Petitions
Accused Products
Abstract
Methods and apparatus for reducing power consumption of a code division multiple access (CDMA) communication device are described. The CDMA communication device operates in a communication session with a base station during which information is communicated over an information channel. At some point during the communication session, the device identifies that is has no information to transmit. In response, the device places its transmitter into a low power state and does not transmit any information that it would normally be accustomed to transmit (e.g. overhead such as idle frames) provided that forward RF link is stable. During that time, a receiver of the communication device may remain operative to receive information (e.g. transmitter power values). Provided that there is no need to transmit other necessary information, the transmitter is maintained in the low power state for a duration of time that is less than a fade time expiration of the base station. Thus, the communication device imitates a short fade during the communication session to conserve battery power.
41 Citations
40 Claims
-
1. A method for use in reducing power consumption in a code division multiple access (CDMA) communication device having a transmitter which includes a power amplifier (PA), the method comprising the acts of:
-
maintaining the CDMA communication device in a voice or a data call during which information is communicated over forward and reverse traffic channels set up with a base station; in response to identifying that there is no information to transmit by the CDMA communication device;
during at least one portion of the voice or the data call, causing the transmitter to enter and be maintained in a low power state during which the PA is shut off while at least the reverse traffic channel is maintained by the base station; andcausing the transmitter to be exited from the low power state during the voice or the data call so that the PA is turned on again for resuming communications for the voice or the data call. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
-
-
15. A code division multiple access (CDMA) communication device, comprising:
-
a receiver; a transmitter which includes a power amplifier (PA); an antenna coupled to the receiver and the transmitter; a processor coupled to the receiver and the transmitter; the processor being operative to; maintain the CDMA communication device in a voice or a data call during which information is communicated over forward and reverse traffic channels set up with a base station; in response to identifying that there is no information to transmit from the transmitter;
during at least one portion of the voice or the data call, cause the transmitter to enter and be maintained in a low power state during which the PA is shut down while at least the reverse traffic channel is maintained by the base station; andcause the transmitter to be exited from the low power state during the voice or the data call so that the PA is turned on again for resuming communications for the voice or the data call. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23)
-
-
24. A code division multiple access (CDMA) communication system, comprising:
-
a base station operative for CDMA communication; a portable electronic device operative for CDMA communication with the base station; the portable electronic device being further operative to maintain a voice or a data call during which information is communicated over forward and reverse traffic channels set up with the base station; the portable electronic device being further operative to identify, during the voice or the data call, that there is no information to transmit from the portable electronic device to the base station; the portable electronic device being further operative to cause a transmitter of the portable electronic device to enter and be maintained in a low power state during which a power amplifier (PA) of the transmitter is shut off for at least a portion of the voice or the data call, while at least the reverse traffic channel is maintained by the base station, based at least in part on identifying that there is no information to transmit from the portable electronic device; and the portable electronic device being further operative to cause the transmitter to be exited from the low power state during the voice or the data call so that the PA is turned on again for resuming communications for the voice or the data call. - View Dependent Claims (25, 26, 27, 28)
-
-
29. A method for use in reducing power consumption in a battery-operable mobile station which operates in accordance with code division multiple access (CDMA) communications, the method comprising the acts of:
-
maintaining a voice or a data call during which information is communicated over forward and reverse traffic channels setup with a serving base station; based on identifying that there is no information to transmit from a transmitter of the mobile station;
powering down a transmitter power amplifier (PA) during a portion of the voice or the data call such that no signals are transmitted from the transmitter to the serving base station during the portion of the voice or the data call, and setting and running a timer corresponding to a fade timer of the base station;powering up the transmitter PA in response to detecting transmit activity for the voice or the data call prior to expiration of the timer for resuming communications for the voice or the data call; and otherwise powering up the transmitter PA in response to detecting an expiration of the timer and before a release of the reverse traffic channel by the serving base station for resuming communications for the voice or the data call. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36)
-
-
37. A code division multiple access (CDMA) mobile station, comprising:
-
a CDMA receiver; a CDMA transmitter; a processor coupled to the CDMA receiver and transmitter; the processor being operative to; maintain the CDMA receiver and transmitter in a voice or a data call during which information is communicated over forward and reverse traffic channels setup with a serving base station; shut down a power amplifier (PA) of the CDMA transmitter during a portion of the voice or the data call, while at least the reverse traffic channel is maintained by the serving base station, based on identifying that there is no information to transmit from the CDMA transmitter; set and run a timer corresponding to a fade timer of the serving base station; power up the PA in response to detecting transmit activity for the voice or the data call prior to expiration of the timer for resuming communications for the voice or the data call; and otherwise power up the PA in response to detecting an expiration of the timer and before release of the reverse traffic channel by the serving base station for resuming communications for the voice or the data call. - View Dependent Claims (38, 39, 40)
-
Specification