Tire pressure management system with enhanced wireless security and control method thereof

Patent metadata

Field	Value
Publication number	US-9457625-B2
Application number	US-201414570031-A
Country	US
Kind code	B2
Filing date	Dec 15, 2014
Priority date	Jan 13, 2014
Publication date	Oct 4, 2016
Grant date	Oct 4, 2016

Abstract

A tire pressure management system with enhanced wireless security and a control method thereof are provided. The tire pressure management system includes initiators configured to wirelessly transmit a tire information request signal to tire pressure sensors when the initiators receive a first signal, a receiver configured to receive packets including the tire information from the tire pressure sensors, and an electronic control unit (ECU) configured to transmit the first signal to the initiators. Further the ECU is configured to measure a delay after transmission of the first signal until the packets are received. The ECU is also configured to transmit the tire information within the received packets to a cluster or drop the received packets in response to the delay.

First claim

What is claimed is:

1. A tire pressure management system, comprising:
a memory configured to store program instructions;
a controller configured to execute the program instructions, the program instructions when executed configured to:
transmit a tire information request signal to tire pressure sensors in response to a first signal;
wirelessly transmit the first signal to a plurality of initiators under a specific driving condition;

receive packets including the tire information from tire pressure sensors;
measure a delay after transmission of the first signal until the packets are received; and
transmit the tire information within the received packets to a cluster or drop the received packets based on the delay.

2. The tire pressure management system according to claim 1 , wherein program instructions when executed are further configured to transmit the first signal to the initiators in a random cycle within a predetermined range.

3. The tire pressure management system according to claim 1 , wherein the program instructions when executed are further configured to:
transmit the tire information to the cluster when the delay is within a predetermined range; and
drop the packets when the delay beyond the predetermined range.

4. The tire pressure management system according to claim 1 , wherein the program instructions when executed are further configured to:
count a predetermined cycle; and
transmit the first received packet to the cluster and drop the remaining packets when a plurality of packets is received within the cycle.

5. The tire pressure management system according to claim 1 , wherein the number of the initiators and the number of the tire pressure sensors each correspond to the number of wheels of a vehicle.

6. A method for controlling a tire pressure management system comprising:
transmitting, by a controller, a first signal to a plurality of initiators under a specific driving condition;
wirelessly transmitting, by the controller, a tire information request signal from the initiators to tire pressure sensors in response to the first signal;
receiving, by the controller, packets including the tire information from the tire pressure sensors through a receiver;
measuring, by the controller, a delay until the packets are received after transmission of the first signal; and
transmitting, by the controller, the tire information within the received packets to a cluster or dropping the received packets based on the delay.

7. The method according to claim 6 , wherein the transmitting the first signal further includes transmitting, by the controller, the first signal to the initiators in a random cycle within a predetermined range.

8. The method according to claim 6 , wherein the transmitting the tire information to the cluster based on the delay further includes:
transmitting, by the controller, the packets to the cluster when the delay is within a predetermined range; and
dropping, by the controller, the packets when the delay exceeds the predetermined range.

9. The method according to claim 6 , when a plurality of packets are received within a predetermined cycle the transmitting the tire information further comprises:
counting, by a controller, the predetermined cycle;
transmitting, by the controller, a first received packet to the cluster and dropping, by the controller, any remaining packets received within the cycle.

10. The method according to claim 6 , wherein wirelessly transmitting the tire information request signal from the initiators to tire pressure sensors in response to the first signal, further includes:
matching, by the controller, a number of the initiators and a number of the tire pressure sensors with a number of wheels of a vehicle.

11. A non-transitory computer readable medium containing program instructions executed by a controller, the computer readable medium comprising:
program instructions that transmit a first signal to a plurality of initiators under a specific driving condition;
program instructions that wirelessly transmit a tire information request signal from the initiators to tire pressure sensors in response to the first signal;
program instructions that receive packets including the tire information from the tire pressure sensors through a receiver;
program instructions that measure a delay after transmission of the first signal until the packets are received; and
program instructions that transmit the tire information within the received packets to a cluster or drop the received packets based on the delay.

12. The non-transitory computer readable medium of claim 11 , wherein the program instructions that transmit a first signal to initiators further includes program instructions that transmit the first signal to the initiators in a random cycle within a predetermined range.

13. The non-transitory computer readable medium of claim 11 , wherein the program instructions that transmit the tire information based on the delay further includes:
program instructions that transmit the packets to the cluster when the delay is within a predetermined range; and
program instructions that drop the packets when the delay exceeds the predetermined range.

14. The non-transitory computer readable medium of claim 11 , when a plurality of packets are received within a predetermined cycle, the program instructions that transmit the tire information further includes:
program instructions that count the predetermined cycled; and
program instructions that transmit a first received packet to the cluster and drop any remaining packets received within the predetermined cycle.

Assignees

• Hyundai Motor Co Ltd

Inventors

• Jung Ho Jin

Classifications

• B60C23/0415 Primary

  Automatically identifying wheel mounted units, e.g. after replacement or exchange of wheels · CPC title

• B60C23/0437

  Means for detecting electromagnetic field changes not being part of the signal transmission per se, e.g. strength, direction, propagation or masking · CPC title

• B60C23/044

  Near field triggers, e.g. magnets or triggers with 125 KHz · CPC title