US 12,285,979 B2
Two-way tire pressure monitoring system (TPMS) learning and authenticated pairing
Jochen Schubert, Farmington Hills, MI (US); Dilip B. Patel, Novi, MI (US); and Arick Evan Rushing, Ypsilanti, MI (US)
Assigned to Ford Global Technologies, LLC, Dearborn, MI (US)
Filed by Ford Global Technologies, LLC, Dearborn, MI (US)
Filed on May 22, 2023, as Appl. No. 18/321,341.
Prior Publication US 2024/0391278 A1, Nov. 28, 2024
Int. Cl. B60C 23/04 (2006.01); H04W 12/0471 (2021.01); H04W 76/14 (2018.01)
CPC B60C 23/0455 (2013.01) [H04W 12/0471 (2021.01); H04W 76/14 (2018.02)] 20 Claims
OG exemplary drawing
 
1. A tire pressure monitoring system (TPMS) sensor, comprising:
one or more processors and memory storing executable instructions that cause the TPMS sensor to:
determine a random value;
determine, based at least in part on the random value, an input value;
derive an output value based at least in part on the input value and a pre-shared secretkey that is also accessible to a vehicle;
determine, based at least in part on a first portion of the output value, a test value;
determine, based at least in part on a second portion of the output value, a pairing passcode (PIN);
broadcast at least one learning mode advertisement, comprising:
a Resolvable Private Addresses (RPA);
sensor data measured by the TPMS sensor;
the random value; and
the test value;
determine the TPMS sensor is connected to the vehicle;
perform a pairing process with the vehicle that includes authenticating the vehicle has access to the pairing PIN; and
contingent upon the pairing process successfully authenticating the vehicle:
establish a secure connection with the vehicle; and
receive an integrity key (IK) from the vehicle via the secure connection.