TIRE PRESSURE MONITORING COMMUNICATION METHOD AND SYSTEM

• US 20130054084A1
• Filed: 08/14/2012
• Published: 02/28/2013
• Est. Priority Date: 08/23/2011
• Status: Abandoned Application

• Current Assignee: Kabushiki Kaisha Tokai RIKA Denki Seisakusho
• Original Assignee: Kabushiki Kaisha Tokai RIKA Denki Seisakusho
• Inventors: KOSUGI, Masanori
• Application Number:
  US13/585,067
• Publication Number:
  US 20130054084A1
• Time in Patent Office: Days
• US Class Current: 701/34.4
• CPC Class Codes: B60C 23/0462 Structure of transmission protocol
• CPC Class Codes: B60C 23/0481 System diagnostic, e.g. monitoring battery voltage, detecting hardware detachments or identifying wireless transmission failures
• CPC Class Codes: H04L 1/0061 Error detection codes
• CPC Class Codes: H04L 1/08 by repeating transmission, e.g. Verdan system H04L1/1858 and H04L1/189 take precedence

Abstract

A communication method transmits a detection signal including a valve ID and detection information, receives the detection signal, performs error detection on the valve ID and detection information, and uses the valve ID and detection information when there is no error. The communication method generates third data corresponding to the detection information in accordance with a predetermined rule to increase redundancy of the detection information, generates computed data by performing an exclusive disjunction logic operation with the valve ID and third data, transmits the detection signal that includes the computed data and detection information, receives the detection signal, retrieves the third data corresponding to the detection information from the detection information, restores the valve ID by performing an exclusive disjunction logical operation with the computed data and the third data, and determines whether a restored valve ID conforms to a stored first data.

Claims

1. A communication method using first data, which is a fixed data string and stored in advance, and second data, which is a variable data string, the communication method comprising:

generating third data that corresponds to the second data in accordance with a predetermined rule to increase redundancy of the second data;

generating exclusive disjunction data by performing an exclusive disjunction logic operation with the first data and the third data;

transmitting a wireless signal including the exclusive disjunction data and the second data;

receiving the wireless signal;

retrieving the third data, which corresponds to the second data, from the second data in the received wireless signal;

restoring the first data by performing an exclusive disjunction logical operation with the exclusive disjunction data in the received wireless signal and the third data; and

determining whether or not the first data that is stored in advance conforms to the restored first data.

2. The communication method according to claim 1, further comprising

after generating the exclusive disjunction data, computing an error detection code from a data string of the exclusive disjunction data and the second data,

wherein the transmitting a wireless signal includes transmitting the wireless signal including the exclusive disjunction data, the second data, and the error detection code, and

the method further includes

detecting an error in the received wireless signal using the error detection code included in the received wireless signal.

3. A communication system using first data, which is a fixed data string and stored in advance, and second data, which is a variable data string, the communication system comprising:

a transmitter that transmits a wireless signal; and

a receiver that receives the wireless signal from the transmitter;

wherein the transmitter is configured to

generate third data that corresponds to the second data in accordance with a predetermined rule to increase redundancy of the second data,

generate exclusive disjunction data by performing an exclusive disjunction logic operation with the first data and the third data, and

transmit a wireless signal including the exclusive disjunction data and the second data; and

the receiver is configured to

receive the wireless signal,

retrieve the third data, which corresponds to the second data, from the second data in the received wireless signal,

restore the first data by performing an exclusive disjunction logical operation with the exclusive disjunction data in the received wireless signal and the third data, and

determine whether or not the first data that is stored in advance conforms to the restored first data.

4. The communication system according to claim 3, wherein

the transmitter is configured to

compute an error detection code from a data string of the exclusive disjunction data and the second data after generating the exclusive disjunction data, and

transmit the wireless signal including the exclusive disjunction data, the second data, and the error detection code;

and

the receiver is configured to detect an error in the received wireless signal using the error detection code included in the received wireless signal.

9. A tire pressure monitoring system comprising:

the communication system according to claim 3, wherein

the transmitter is a tire valve,

the receiver is arranged in a vehicle,

the first data is a unique valve ID of the tire valve, and

the second data is detection information obtained by the tire valve.

5. A transmitter that performs communication using first data, which is a fixed data string, and second data, which is a variable data string, the transmitter comprising:

a control unit configured to generate third data that corresponds to the second data in accordance with a predetermined rule to increase redundancy of the second data, generate exclusive disjunction data by performing an exclusive disjunction logic operation with the first data and the third data, and generate a wireless signal including the exclusive disjunction data and the second data; and

a transmitter connected to the control unit, wherein the transmitter transmits the wireless signal.

6. The transmitter according to claim 5, wherein

the control unit is configured to compute an error detection code from a data string of the exclusive disjunction data and the second data after generating the exclusive disjunction data, and

the transmitter is configured to transmit the wireless signal including the exclusive disjunction data, the second data, and the error detection code.

7. A receiver that performs communication using first data, which is a fixed data string and stored in advance, and second data, which is a variable data string, the receiver comprising:

a receiver unit that receives a wireless signal including the second data and exclusive disjunction data, which is generated by performing an exclusive disjunction logic operation with the first data and third data, wherein the third data corresponds to the second data and is generated in accordance with a predetermined rule to increase redundancy of the second data; and

a controller connected to the receiver unit, wherein the controller is configured to retrieve the third data, which corresponds to the second data, from the second data in the received wireless signal, restore the first data by performing an exclusive disjunction logical operation with the exclusive disjunction data in the received wireless signal and the third data, and determine whether or not the first data that is stored in advance conforms to the restored first data.

8. The receiver according to claim 7, wherein the controller is configured to detect an error in the received wireless signal using the error detection code included in the received wireless signal.