Method and apparatus for adaptive bluetooth low power discovery and wake up
First Claim
1. A method of low power discovery (LPD) that extends the battery life of a portable Wi Fi device or portable media player (PMP) using IEEE 802.11 Wireless Local Area Network (WLAN) interface by ensuring that the portable Wi Fi device or PMP host processor is only on when in designated 802.11 coverage or when needed by a user, by employing probabilistic channel scanning comprising:
- A) uploading dynamic wake-up triggers to Media Access Control (MAC) firmware;
B) bringing an Access Terminal (AT) host equipped with an 802.11 interface to an advanced configuration and power interface (ACPI) state S3 or equivalent sleep state prior to the portable Wi Fi device or portable media player going to sleep; and
C) programming the 802.11 WLAN to wake up based on the uploaded triggers.
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Abstract
A method for adaptive Bluetooth low power wake up and discovery is provided whereby wake-up triggers are uploaded to Media Access Control (MAC) firmware. A data stream representing a trigger arrives as either an interpretable binary stream of instructions, or as a concatenation of events listed in a preset table. Various parameters allowing flexible wake-up triggering, such as Service Set Identifiers (SSIDs) to scan for probability likelihoods, are also uploaded. Both table-based and interpretable instructions are designed to ensure the security of the trigger by limiting the functionality of the trigger to only trigger-related events (e.g., scanning, pre-reserved memory). Both the table and the instruction set are designed in a minimalistic fashion to allow a slim and fast firmware-side implementation. Insignificant modifications to existing computer or Operating System (OS) architecture take advantage of the already existing MAC processor in many 802.11 interfaces, offering enormous flexibility.
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Citations
19 Claims
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1. A method of low power discovery (LPD) that extends the battery life of a portable Wi Fi device or portable media player (PMP) using IEEE 802.11 Wireless Local Area Network (WLAN) interface by ensuring that the portable Wi Fi device or PMP host processor is only on when in designated 802.11 coverage or when needed by a user, by employing probabilistic channel scanning comprising:
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A) uploading dynamic wake-up triggers to Media Access Control (MAC) firmware; B) bringing an Access Terminal (AT) host equipped with an 802.11 interface to an advanced configuration and power interface (ACPI) state S3 or equivalent sleep state prior to the portable Wi Fi device or portable media player going to sleep; and C) programming the 802.11 WLAN to wake up based on the uploaded triggers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification