Mobile station having waiting process with main power off

• US 20030054853A1
• Filed: 09/18/2002
• Published: 03/20/2003
• Est. Priority Date: 09/20/2001
• Status: Active Grant

• Current Assignee: DENSO Corporation
• Original Assignee: DENSO Corporation
• Inventors: Kouchiyama, Satoshi, Karashima, Teruhiko
• Granted Patent: US 7,046,981 B2
• Time in Patent Office: Days
• US Class Current: 455/522
• CPC Class Codes: H04W 4/90 Services for handling of emergency or hazardous situations, e.g. earthquake and tsunami warning systems [ETWS]
• CPC Class Codes: H04W 52/0274 by switching on or off the equipment or parts thereof
• CPC Class Codes: H04W 76/50 for emergency connections
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

While main power in an automobile is off, a telematics station in the automobile intermittently runs to execute a process. The station has a first CPU in a wireless section for a wireless signal waiting process and a second CPU, having active and sleep modes, in a control section for resetting the first CPU. At resetting timing, if the first CPU is executing the process, it outputs a signal indicating that it is executing the process for the second CPU not to reset it. When the main power turns on, the second CPU determines that the signal is not outputted in order to reset the first CPU.

Claims

1. A mobile station which is provided in a moving object and which intermittently runs to execute a wireless signal waiting process even while main power of the moving object is off, said mobile station comprising:

a first CPU which executes the wireless signal waiting process; and

resetting means which resets said first CPU,

wherein said resetting means does not reset said first CPU while said first CPU executes the wireless signal waiting process at resetting timing when said resetting means starts to reset said first CPU.

2. A mobile station as recited in claim 1, wherein said resetting means includes a second CPU which does not reset said first CPU by determining that said first CPU outputs a waiting signal indicating that said first CPU is executing the wireless signal waiting process.

3. A mobile station as recited in claim 2,

wherein said second CPU runs in either of sleep and active modes, and

wherein said second CPU determines whether said first CPU outputs said waiting signal when said second CPU shifts from the sleep mode to the active mode when main power of the moving object turns on.

4. A mobile station as recited in claim 2,

wherein said second CPU runs in either of sleep and active modes, and

wherein said second CPU determines whether said first CPU outputs said waiting signal when said second CPU shifts from the sleep mode to the active mode by a signal from an external interface.

5. A mobile station as recited in claim 2,

wherein said second CPU controls power supply for said first CPU, and

wherein said second CPU asserts a reset signal outputted to said first CPU, starts the power supply to said first CPU, and then negates said reset signal in a case that the second CPU resets said first CPU.

6. A mobile station as recited in claim 1,

wherein said first CPU executes a receiving process,

wherein in the receiving process said first CPU determines whether an incoming call has been received, and

wherein said resetting means does not reset said first CPU while said first CPU executes the receiving process at said resetting timing.

7. A mobile station as recited in claim 6, wherein said resetting means includes a second CPU which does not reset said first CPU by determining that said first CPU outputs a signal indicating that said first CPU is executing the receiving process.

8. A mobile station as recited in claim 1,

wherein said first CPU executes a wireless communicating process, and

wherein said resetting means does not reset said first CPU while said first CPU executes the wireless communicating process at said resetting timing.

9. A mobile station as recited in claim 8, wherein said resetting means includes a second CPU which does not reset said first CPU by determining that said first CPU outputs a signal indicating that said first CPU is executing the wireless communicating process.

10. A mobile station which is provided in a moving object and which intermittently runs to execute a wireless signal waiting process even while main power of the moving object is off, said mobile station comprising:

a first CPU which executes the wireless signal waiting process; and

a second CPU which communicates with said first CPU,

wherein said first CPU outputs to said second CPU a waiting signal indicating that said first CPU is executing the wireless signal waiting process while said first CPU executes the wireless signal waiting process, and

wherein said second CPU resets said first CPU by determining that said first CPU does not output said waiting signal when the main power of the moving object turns on.

11. A mobile station which is provided in a moving object and which intermittently runs to execute a wireless signal waiting process even while main power of the moving object is off, said mobile station comprising:

a first CPU which executes the wireless signal waiting process and a receiving process, wherein in the receiving process said first CPU determines whether an incoming call has been received; and

resetting means which resets said first CPU,

wherein said resetting means does not reset said first CPU while said first CPU executes the receiving process at resetting timing when said resetting means starts to reset said first CPU.

12. A mobile station provided in a moving object comprising:

a wireless section which sends and receives a wireless signal;

a control section which controls communications with outside through said wireless section;

a first CPU which periodically runs to execute a wireless signal waiting process in said wireless section; and

a second CPU which executes data processing for communicating with the outside in said control section and which runs in either of sleep and active modes,

wherein said second CPU shifts from the sleep mode to the active mode when the second CPU receives from the first CPU a reception signal indicating that the wireless signal has been received while main power of the moving object is off.

13. A mobile station as recited in claim 12, further comprising:

periodic triggering means which periodically triggers said first CPU to run to execute the wireless signal waiting process.

14. A mobile station as recited in claim 13, wherein said periodic triggering means includes a clock which counts predetermined time.

15. A mobile station as recited in claim 12, further comprising;

a GPS receiver; and

a first switch which controls power supply to said GPS receiver, wherein said first CPU controls ON/OFF of said first switch.

16. A mobile station as recited in claim 12, further comprising;

a wireless phone; and

a second switch which controls power supply to said wireless phone, wherein said first CPU controls ON/OFF of said second switch.

17. A mobile station as recited in claim 16, wherein said first CPU generates a digital transmission signal with said second switch ON/OFF for phone communication.

18. A mobile station as recited in claim 12, wherein said first CPU outputs to said second CPU said reception signal after said first CPU determines wireless reception when said first CPU receives same data more than one time in the wireless signal waiting process.

19. A mobile station as recited in claim 12, further comprising;

an external interface which is provided in said control section and which communicates with devices in the moving object, wherein said second CPU shifts from the sleep mode to the active mode by a signal from said external interface.

20. A mobile station as recited in claim 19, wherein said external interface connects with local area network within the moving object.

21. A mobile station as recited in claim 19, wherein said external interface connects with a manipulation button.

22. A mobile station provided in a moving object comprising:

a wireless section which sends and receives a wireless signal;

a control section which controls communications with outside through said wireless section; and

periodic triggering means which is provided in said wireless section and which outputs a signal for periodic power supply while main power of the moving object is off,

wherein said wireless section receives the power supply by the signal outputted by said periodic triggering means to run to execute a wireless signal waiting process.

23. A mobile station as recited in claim 22, wherein said control section, which runs in either of sleep and active modes, shifts from the sleep mode to the active mode when said wireless section outputs a reception signal indicating the wireless signal has been received.

24. A method of resetting a CPU for a mobile station which runs in either of sleep and active modes and is provided with said CPU intermittently running to execute a wireless signal waiting process even while said mobile station runs in the sleep mode, said method comprising steps of:

outputting from said first CPU a waiting signal indicating that the wireless signal waiting process is being executed while the wireless signal waiting process is executed;

shifting from the sleep mode to the active mode;

determining presence or absence of said waiting signal;

asserting a reset signal outputted to said first CPU when the absence is determined;

supplying said first CPU with power after asserting said reset signal;

resetting said first CPU after supplying the power; and

negating said reset signal after said first CPU is reset.