Controlling a power state of a cellular packet data subsystem in a portable electronic device
First Claim
1. A method for use in a portable electronic device, wherein the portable electronic device comprises:
- a wireless local area network (WLAN) subsystem;
a cellular packet data subsystem for communicating packet data;
a cellular voice subsystem for communicating cellular voice information; and
a processing subsystem;
wherein the method comprises;
while communicating packet data using the cellular packet data subsystem,establishing, with the WLAN subsystem, a connection to a WLAN;
determining, with the WLAN subsystem, a signal strength of the connection to the WLAN;
determining, with the processing subsystem, based at least in part on the signal strength of the connection to the WLAN exceeding a threshold, to switch from the cellular packet data subsystem to the WLAN subsystem for the communication of the packet data to and from the portable electronic device;
setting the cellular packet data subsystem into a reduced power state that reduces power consumption of the cellular packet data subsystem, wherein the setting the cellular packet data subsystem into the reduced power state comprises reducing a search frequency for a cellular data signal; and
communicating, with the WLAN subsystem, the packet data to and from the portable electronic device while the cellular data subsystem is in the reduced power state.
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Accused Products
Abstract
A method and system are described for use in a portable electronic device that includes a wireless local area network (WLAN) subsystem, a cellular packet data subsystem for communicating packet data, a cellular voice subsystem for communicating cellular voice information, and a processing subsystem. In the described embodiments, the WLAN subsystem establishes a connection to a WLAN and the WLAN subsystem then determines the signal strength of the connection to the WLAN. Then, on condition that the signal strength exceeds a threshold, the processing subsystem selects the WLAN subsystem for the communication of packet data to and from the portable electronic device, and puts the cellular packet data subsystem into a reduced power state that reduces the power consumption of the cellular packet data subsystem. Packet data is then communicated to and from the portable electronic device using the WLAN subsystem while the cellular data subsystem is in the reduced power state.
33 Citations
18 Claims
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1. A method for use in a portable electronic device, wherein the portable electronic device comprises:
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a wireless local area network (WLAN) subsystem; a cellular packet data subsystem for communicating packet data; a cellular voice subsystem for communicating cellular voice information; and a processing subsystem; wherein the method comprises; while communicating packet data using the cellular packet data subsystem, establishing, with the WLAN subsystem, a connection to a WLAN; determining, with the WLAN subsystem, a signal strength of the connection to the WLAN; determining, with the processing subsystem, based at least in part on the signal strength of the connection to the WLAN exceeding a threshold, to switch from the cellular packet data subsystem to the WLAN subsystem for the communication of the packet data to and from the portable electronic device; setting the cellular packet data subsystem into a reduced power state that reduces power consumption of the cellular packet data subsystem, wherein the setting the cellular packet data subsystem into the reduced power state comprises reducing a search frequency for a cellular data signal; and communicating, with the WLAN subsystem, the packet data to and from the portable electronic device while the cellular data subsystem is in the reduced power state. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A non-transitory computer-readable storage medium containing instructions related to a method executed by a portable electronic device, wherein the portable electronic device includes:
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a wireless local area network (WLAN) subsystem; a cellular packet data subsystem for communicating packet data; a cellular voice subsystem for communicating cellular voice information; and a processing subsystem; wherein the method comprises; establishing, with the WLAN subsystem, a connection to a WLAN; determining, with the WLAN subsystem, a signal strength of the connection to the WLAN; in response to the signal strength exceeding a threshold; selecting the WLAN subsystem for the communication of packet data to and from the portable electronic device; and setting the cellular packet data subsystem into a reduced power state that reduces power consumption of the cellular packet data subsystem, wherein the setting the cellular packet data subsystem into the reduced power state comprises reducing a search frequency for a cellular data signal; and communicating, with the WLAN subsystem, the packet data to and from the portable electronic device while the cellular data subsystem is in the reduced power state. - View Dependent Claims (8, 9, 10, 11, 12)
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13. An apparatus that controls a power state of a cellular packet data subsystem in a portable electronic device, comprising:
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a cellular voice subsystem; a wireless local area network (WLAN) subsystem that establishes a connection to a WLAN; and a processing subsystem configured to; receive, from the WLAN subsystem, after establishing the connection to the WLAN, a signal strength of a connection to the WLAN; in response to the signal strength exceeding a threshold, select the WLAN subsystem for the communication of the packet data to and from the portable electronic device; set the cellular packet data subsystem into a reduced power state that reduces a power consumption of the cellular packet data subsystem, wherein the cellular packet data subsystem is configured to reduce a search frequency for a cellular data signal in the reduced power state; and communicate the packet data to and from the portable electronic device using the WLAN subsystem while the cellular data subsystem is in the reduced power state. - View Dependent Claims (14, 15, 16, 17, 18)
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Specification