Method and apparatus for estimating transmit power of a wireless device

摘要

The present disclosure sets forth a method for tracking path loss in which a monitoring device issues a series of power step commands and transmit power requests to a reporting device, receives transmit power data in response to the transmit power requests, and creates a data structure (e.g., a table) that maps the number of steps (e.g., number of steps increased or decreased) of the power step commands with the reported transmit powers. This process is performed during the initial connection between the monitoring device and the reporting device.

主权项

1. A method comprising:
transmitting a first power control command to a device indicating a power level at which the device is to transmit; initiating a first request for the device to report its transmit power; receiving a first reported transmit power from the device in response to the first request; transmitting a second power control command to the device indicating one or more power steps by which the device is to change its transmit power level; initiating a second request for the device to report its transmit power; receiving a second reported transmit power from the device in response to the second request; creating a data structure that maps the indicated power level of the first power control command to the first reported transmit power, and maps the one or more power steps of the second power control command to the second reported transmit power, the data structure including a set of path loss trigger conditions; measuring a strength of signals received from the device; determining a path loss from the device based on the measured strength of the signals and an estimated current transmit power level of the device as referenced from the data structure; determining, by a radio controller, whether the path loss coincides with one or more of the path loss trigger conditions; and waking a host processor, by the radio controller, if the determined path loss coincides with the one or more path loss trigger conditions.