Method and apparatus for MIMO WLAN power optimization
First Claim
1. A method for configuring wireless circuitry in a wireless communication device, the method comprising:
- by the wireless communication device;
providing, to a wireless local area network (WLAN) access point (AP), a first message that indicates the wireless communication device supports a multiple-input multiple-output (MIMO) capability;
receiving, from the WLAN AP, a second message that indicates the WLAN AP supports the MIMO capability;
configuring the wireless circuitry to use a MIMO mode that includes at least two downlink spatial streams to receive communication from the WLAN AP based at least in part on;
data transfer characteristics of an active foreground application that is executing on the wireless communication device, anda power reduction state of the wireless communication device;
otherwise, configuring the wireless circuitry to use a single-input single output (SISO), a multiple-input single-output (MISO) mode, or a single-input multi-output (SIMO) mode that includes only a single downlink spatial stream to receive communication from the WLAN AP; and
receiving, from the WLAN AP, communication in accordance with the configured mode.
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Abstract
Apparatus and methods for configuring wireless circuitry of a wireless device to optimize power consumption based on operating states of the wireless device are disclosed. When associating with or while associated with a multiple-input multiple-output (MIMO) capable wireless local area network (WLAN) access point (AP), the wireless device configures the wireless circuitry to use a MIMO mode that includes at least two spatial streams for communication with multiple radio frequency (RF) receive chains active, a single-input single-output (SISO) mode or a multiple-input single-output (MISO) mode that includes only one spatial stream and a single RF receive chain active, or a single-input multiple-output (SIMO) mode that includes only one spatial stream and multiple RF receive chains active, based on balancing application requirements for data throughput with power saving modes to conserve battery levels. MIMO modes can be used when an active application benefits from MIMO rates or when transferring large files.
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Citations
20 Claims
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1. A method for configuring wireless circuitry in a wireless communication device, the method comprising:
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by the wireless communication device; providing, to a wireless local area network (WLAN) access point (AP), a first message that indicates the wireless communication device supports a multiple-input multiple-output (MIMO) capability; receiving, from the WLAN AP, a second message that indicates the WLAN AP supports the MIMO capability; configuring the wireless circuitry to use a MIMO mode that includes at least two downlink spatial streams to receive communication from the WLAN AP based at least in part on; data transfer characteristics of an active foreground application that is executing on the wireless communication device, and a power reduction state of the wireless communication device; otherwise, configuring the wireless circuitry to use a single-input single output (SISO), a multiple-input single-output (MISO) mode, or a single-input multi-output (SIMO) mode that includes only a single downlink spatial stream to receive communication from the WLAN AP; and receiving, from the WLAN AP, communication in accordance with the configured mode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A wireless communication device comprising:
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wireless circuitry including a plurality of radio frequency (RF) receive chains; one or more processors communicatively coupled to the wireless circuitry; and a memory communicatively coupled to the one or more processors, wherein the one or more processors are configured to execute computer-executable instructions stored within the memory to cause the wireless communication device to; configure the wireless circuitry to use a single-input single-output (SISO) mode or a multiple-input single output (MISO) mode that includes only a single downlink spatial stream to receive communication from a wireless local area network (WLAN) access point (AP) and activates only a single RF receive chain when configured in a user-specified power save mode and/or when a battery level falls below a low battery threshold; configure the wireless circuitry to use a multiple-input multiple-output (MIMO) mode that includes at least two downlink spatial streams to receive communication from the WLAN AP based at least in part on data transfer characteristics of an active foreground application that is executing on the wireless communication device; and receive, from the WLAN AP, communication in accordance with the configured mode. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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20. A non-transitory computer-readable medium storing instructions for configuring wireless circuitry of a wireless communication device, the instructions, when executed by one or more processors, cause the wireless communication device to:
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configure wireless circuitry of the wireless communication device to use a multiple-input multiple-output (MIMO) mode that includes at least two downlink spatial streams to receive communication from a wireless local area network (WLAN) access point (AP) when a data transfer rate of an active foreground application that is executing on the wireless communication device satisfies a MIMO data rate threshold and the wireless communication device is not operating in a power save mode or with a low battery level; otherwise, configure the wireless circuitry to use a single-input single output (SISO), a multiple-input single-output (MISO) mode, or a single-input multi-output (SIMO) mode that includes only a single downlink spatial stream to receive communication from the WLAN AP; and receive, from the WLAN AP, communication in accordance with the configured mode.
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Specification