US 12,133,067 B2
Communication apparatus and method for secure low power transmission
Rojan Chitrakar, Singapore (SG); Lei Huang, Singapore (SG); and Yoshio Urabe, Nara (JP)
Assigned to Panasonic Intellectual Property Corporation of America, Torrance, CA (US)
Filed by Panasonic Intellectual Property Corporation of America, Torrance, CA (US)
Filed on Jul. 18, 2023, as Appl. No. 18/354,543.
Application 18/354,543 is a continuation of application No. 18/149,607, filed on Jan. 3, 2023, granted, now 11,751,048.
Application 18/149,607 is a continuation of application No. 16/614,821, granted, now 11,601,804, issued on Mar. 7, 2023, previously published as PCT/JP2018/016081, filed on Apr. 19, 2018.
Claims priority of provisional application 62/520,452, filed on Jun. 15, 2017.
Claims priority of application No. 2017-212884 (JP), filed on Nov. 2, 2017.
Prior Publication US 2023/0362634 A1, Nov. 9, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04W 12/10 (2021.01); H04W 12/037 (2021.01); H04W 12/04 (2021.01); H04W 12/106 (2021.01); H04W 52/02 (2009.01)
CPC H04W 12/037 (2021.01) [H04W 12/04 (2013.01); H04W 12/106 (2021.01); H04W 52/0235 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A communication apparatus, comprising:
circuitry, which, in operation, uses both a temporal key and a first part of a Timing Synchronization Function (TSF) timer of the communication apparatus as inputs to compute a Message Integrity Code (MIC); and
a transmitter, which, in operation, transmits, to a station associated with the communication apparatus, a frame with the MIC which controls the station to return from a power saving mode,
wherein the frame includes a second part of the TSF timer of the communication apparatus for time adjustment and does not include the first part of the TSF timer of the communication apparatus for MIC verification, and the station receives the frame and uses a station TSF timer to generate a local MIC for comparison with the MIC included in the received frame.