US Patent No. 10,251,198

CLEAR CHANNEL ASSESSMENT THRESHOLD CONFIGURATION


Patent No. 10,251,198
Issue Date April 02, 2019
Title Clear Channel Assessment Threshold Configuration
Inventorship Yu Wang, Solna (SE)
Filip Mestanov, Sollentuna (SE)
Assignee TELEFONAKTIEBOLAGET LM ERICSSON (PUBL), Stockholm (SE)

Claim of US Patent No. 10,251,198

1. A method of an access point adapted to operate in association with a communication standard with application of a sense-before-transmit principle and adapted to communicate via a wireless channel with at least a first wireless communication device (WCD) associated with the access point and a second WCD associated with the access point, the method comprising:maintaining a first clear channel assessment threshold (CCAT) value for the first WCD based on one or more parameters of the first WCD;
maintaining a second CCAT value for the second WCD based on one or more parameters of the second WCD, wherein the first and second CCAT values are separate values;
obtaining data intended for the first WCD; and
after obtaining the data intended for the first WCD, determining, based on the first CCAT value maintained for the first WCD, whether the wireless channel is free for a downlink transmission from the access point to the first WCD; and
as a result of determining, based on the first CCAT value maintained for the first WCD, that the wireless channel is free for a downlink transmission from the access point to the first WCD, transmitting to the first WCD the data intended for the first WCD, wherein
the step of determining, based on the first CCAT value maintained for the first WCD, whether the wireless channel is free for a downlink transmission from the access point to the first WCD comprises:
comparing a received signal level to the first CCAT value; and
determining the channel to be free for transmission to the first WCD as a result of determining that the received signal level does not exceed the first CCAT value maintained for the first WCD.