Patent ID: 11972649
Assignee: DENSO CORPORATION
Field: Control (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A system for determining a location of a portable device relative to a vehicle, said system comprising:
a system device configured to determine the location of the portable device relative to the vehicle;
a first transceiver and a second transceiver disposed on the vehicle, the first transceiver configured for first wireless communications with the portable device at a frequency of 2 GHz or greater, the second transceiver configured for second wireless communications with the portable device at a frequency of 2 GHz or greater;
a control unit operable to determine, based on a first sensed characteristic of the first wireless communications with the portable device at a frequency of 2 GHz or greater, first information indicative of a location of the portable device relative to the first transceiver, wherein the first wireless communications from which the first information indicative of location is determined are communicated according to a variable transmission rate;
the control unit operable to obtain, via the second wireless communications with the portable device at a frequency of 2 GHz or greater, second information pertaining to an authorization of the portable device relative to the vehicle, wherein the second wireless communications from which the second information pertaining to the authorization is obtained are communicated according to a transmission rate that is different from the first communications;
wherein the system device determines the location of the portable device based on the first information determined by the control unit, whereby the location of the portable device is based on the first sensed characteristic of the first wireless communications at the frequency of 2 GHz or greater;
wherein authorization of the portable device relative to the vehicle is determined based on the second information obtained via the second wireless communications; and
wherein the first wireless communications are transmitted at a first transmission rate, wherein the second wireless communications are transmitted at a second transmission rate, wherein the first transmission rate is different from the second transmission rate.