Patent ID: 9374782
Filing Date: 2016-06-21
CPC Classification: H04W,Y02D

Claim Text:
1. A method, comprising: transitioning a network interface of a first wireless communication device from a low power state to an active state, wherein after transitioning the network interface to the active state, determining whether a communication channel is available; generating a first data unit that includes a request for a second wireless communication device to transmit to the first wireless communication device data for the first wireless communication device that is buffered at the second wireless communication device; in response to determining that the communication channel is available, transmitting to the second wireless communication device, via the communication channel, the first data unit that includes the request; receiving from the second wireless communication device, via the communication channel, a second data unit that includes determining, based on the timing information in the second data unit, a wakeup time at which the network interface of the first wireless communication device is to subsequently transition from the low power state to the active state in order to receive a subsequent transmission from the second wireless communication device; transitioning the network interface of the first wireless communication device from the active state to the low power state after receiving the second data unit; at the determined wakeup time, transitioning the network interface of the first wireless communication device from the low power state to the active state; receiving, from the second wireless communication device and after the determined wakeup time, a beacon data unit; processing the beacon data unit to determine the subsequent time at which the second wireless communication device will transmit data for the first wireless communication device that was buffered at the second wireless communication device; transitioning the network interface of the first wireless communication device from the active state to the low power state after receiving the beacon data unit; at the determined subsequent time, transitioning the network interface of the first wireless communication device from the low power state to the active state; and receiving, from the second wireless communication device and after the determined subsequent time, data for the first wireless communication device that was buffered at the second wireless communication device.