Patent ID: 11924761
Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
Field: Digital communication (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 13:
14. A method implemented by a communication apparatus, comprising:
determining wake-up operating parameters including a starting point of a duty cycle schedule and entering Wake-up Radio (WUR) mode by communicating with a second communication apparatus, wherein the duty cycle schedule specifies a period of a WUR duty cycle, and wherein, during a WUR state, the communication apparatus continues to operate through a WUR beacon interval for two WUR duty cycles, the WUR beacon interval being configured for receiving one WUR Beacon transmission, and each WUR duty cycle including a WUR awake state and a WUR doze state; and
receiving a WUR Beacon transmission in the WUR beacon interval and refraining from receiving buffered downlink traffic data during the WUR state,
wherein a start timing of the WUR awake state is aligned with a target WUR Beacon transmission time (TWBTT) of the WUR Beacon transmission in the WUR mode or aligned with the TWBTT with an added constant time offset, and
wherein one of the wake-up operating parameters is a time resolution of a partial Time Synchronization Function (TSF), the time resolution of the partial TSF being negotiated between the communication apparatus and the second communication apparatus based on a WUR TSF timer accuracy of each communication apparatus associated with the second communication apparatus, the negotiated time resolution of the partial TSF being used to calculate a maximum correctable drift due to a partial TSF field, the calculated maximum correctable drift being used to set the WUR Beacon interval, the maximum correctable drift due to the partial TSF field being calculated by Equation (1),

dmax=±2(Lpt−1)×Dpt  Equation(1)

wherein Lpt is a size of the Partial TSF field and Dpt is the time resolution of the Partial TSF field.