Mobile device and method for correcting errors occurring in attention commands of the mobile device

• US 8,769,351 B2
• Filed: 02/10/2012
• Issued: 07/01/2014
• Est. Priority Date: 04/26/2011
• Status: Active Grant

• Current Assignee: Chi Mei Communication Systems Incorporated (Hon Hai Precision Industry Co., Ltd.), Shenzhen Futaihong Precision Industrial Company Limited (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Chi Mei Communication Systems Incorporated (Hon Hai Precision Industry Co., Ltd.), Shenzhen Futaihong Precision Industrial Company Limited (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Li, Ying-Zheng
• Primary Examiner(s): Ehne, Charles
• Application Number:
  US13/370,315
• Publication Number:
  US 20120278666A1
• Time in Patent Office: 872 Days
• Field of Search: 714/55
• US Class Current: 714/55
• CPC Class Codes: G06F 11/0742 in a data processing system embedded in a mobile device, e.g. mobile phones, handheld devices
• CPC Class Codes: G06F 11/0757 by exceeding a time limit, i.e. time-out, e.g. watchdogs
• CPC Class Codes: H04L 2001/0094 Bus

Abstract

In a method for correcting errors occurring in attention (AT) commands of a mobile device, the mobile device includes a first user identity module (UIM) chipset, a second UIM chipset, a buffer and a timer. The method sets a response time for a communication between the first UIM chipset and the second chipset according to an AT command, backups the AT command into the buffer, and counts a communication time using the timer. When the communication time exceeds the response time, the method restarts the first UIM chipset using a watchdog timer and restarts the second UIM chipset by resetting voltage levels of I/O pins of the second UIM chipset. The method further clears the communication data stored in the buffer, reads the AT command from the buffer and resends the AT command to control the first UIM chipset to communicate with the UIM second chipset normally.

Claims

1. A mobile device, comprising:

a first user identity module (UIM) chipset and a second UIM chipset;

a buffer, a timer, and a microprocessor; and

one or more programs stored in a storage system and executed by the microprocessor, the one or more programs comprising;

a command backup module operable to set a response time for a communication between the first UIM chipset and the second chipset according to an attention (AT) command, backup the AT command into the buffer, and count a communication time of the communication between the first UIM chipset and the second chipset using the timer;

a command listening module operable to determine whether the communication time exceeds the response time, check whether the first UIM chipset is unworkable when the communication time exceeds the response time, restart the first UIM chipset using a watchdog timer if the first UIM chipset is unworkable, check whether the second UIM chipset is unworkable if the first UIM chipset is workable, and restart the second UIM chipset by resetting voltage levels of I/O pins of the second UIM chipset if the second UIM chipset is unworkable;

an error correcting module operable to generate an interruption command if the second UIM chipset is workable, send the interruption command to the first UIM chipset and the UIM second chipset, and clear the communication data stored in the buffer when the interruption command is received by the first UIM chipset and the UIM second chipset; and

a communication module operable to read the AT command from the buffer, resend the backup AT command to a data transmission channel between the first UIM chipset and the second chipset, and control the first UIM chipset to communicate with the UIM second chipset according to the AT command.

2. The mobile device according to claim 1, wherein the error correcting module is further operable to remove the AT command from the data transmission channel when the interruption command is received by the first UIM chipset and the UIM second chipset.

3. The mobile device according to claim 1, wherein the communication data comprise sent data, received data, and parsed data of the first UIM chipset or the second UIM chipset.

4. The mobile device according to claim 1, wherein the watchdog timer is a listening thread that monitors the communication between the first UIM chipset and the second UIM chipset.

5. The mobile device according to claim 1, wherein the first UIM chipset comprises a first UIM input pin and a first output pin, and the second UIM chipset comprises a second UIM input pin and a second output pin.

6. The mobile device according to claim 5, wherein the command listening module resets a voltage level of the second input pin as a high voltage level and resets a voltage level of the second first pin as a low voltage level to restart the second UIM chipset.

7. A method for correcting errors occurring in attention (AT) commands of a mobile device, the mobile device comprising a first user identity module (UIM) chipset, a second UIM chipset, a buffer and a timer, the method comprising:

setting a response time for a communication between the first UIM chipset and the second chipset according to an AT command;

backing-up the AT command into the buffer, and counting a communication time of the communication between the first UIM chipset and the second chipset using the timer;

determining whether the communication time exceeds the response time;

checking whether the first UIM chipset is unworkable when the communication time exceeds the response time;

restarting the first UIM chipset using a watchdog timer if the first UIM chipset is unworkable;

checking whether the second UIM chipset is unworkable if the first UIM chipset is workable;

restarting the second UIM chipset by resetting voltage levels of I/O pins of the second UIM chipset if the second UIM chipset is unworkable;

generating an interruption command if the second UIM chipset is workable, and sending the interruption command to the first UIM chipset and the UIM second chipset;

clearing the communication data stored in the buffer when the interruption command is received by the first UIM chipset and the UIM second chipset;

reading the AT command from the buffer and resending the backup AT command to a data transmission channel between the first UIM chipset and the second chipset; and

controlling the first UIM chipset to communicate with the UIM second chipset according to the AT command.

8. The method according to claim 7, further comprising:

removing the AT command from the data transmission channel when the interruption command is received by the first UIM chipset and the UIM second chipset.

9. The method according to claim 7, wherein the communication data comprise sent data, received data, and parsed data of the first UIM chipset or the second UIM chipset.

10. The method according to claim 7, wherein the watchdog timer is a listening thread that monitors the communication between the first UIM chipset and the second UIM chipset.

11. The method according to claim 7, wherein the first UIM chipset comprises a first UIM input pin and a first output pin, and the second UIM chipset comprises a second UIM input pin and a second output pin.

12. The method according to claim 11, wherein the second UIM chipset is restarted by resetting a voltage level of the second input pin as a high voltage level and resetting a voltage level of the second first pin as a low voltage level to restart the second UIM chipset.

13. A non-transitory storage medium having stored thereon instructions that, when is executed by at least one microprocessor of a mobile device, causes the mobile device to perform a method for correcting errors occurring in attention (AT) commands, the mobile device comprising a first user identity module (UIM) chipset, a second UIM chipset, a buffer and a timer, the method comprising:

setting a response time for a communication between the first UIM chipset and the second chipset according to an AT command;

backing-up the AT command into the buffer, and counting a communication time of the communication between the first UIM chipset and the second chipset using the timer;

determining whether the communication time exceeds the response time;

checking whether the first UIM chipset is unworkable when the communication time exceeds the response time;

restarting the first UIM chipset using a watchdog timer if the first UIM chipset is unworkable;

checking whether the second UIM chipset is unworkable if the first UIM chipset is workable;

restarting the second UIM chipset by resetting voltage levels of I/O pins of the second UIM chipset if the second UIM chipset is unworkable;

generating an interruption command if the second UIM chipset is workable, and sending the interruption command to the first UIM chipset and the UIM second chipset;

clearing the communication data stored in the buffer when the interruption command is received by the first UIM chipset and the UIM second chipset;

reading the AT command from the buffer and resending the backup AT command to a data transmission channel between the first UIM chipset and the second chipset; and

controlling the first UIM chipset to communicate with the UIM second chipset according to the AT command.

14. The storage medium according to claim 13, wherein the method further comprises:

removing the AT command from the data transmission channel when the interruption command is received by the first UIM chipset and the UIM second chipset.

15. The storage medium according to claim 13, wherein the communication data comprise sent data, received data, and parsed data of the first UIM chipset or the second UIM chipset.

16. The storage medium according to claim 13, wherein the watchdog timer is a listening thread that monitors the communication between the first UIM chipset and the second UIM chipset.

17. The storage medium according to claim 13, wherein the first UIM chipset comprises a first UIM input pin and a first output pin, and the second UIM chipset comprises a second UIM input pin and a second output pin.

18. The storage medium according to claim 17, wherein the second UIM chipset is restarted by resetting a voltage level of the second input pin as a high voltage level and resetting a voltage level of the second first pin as a low voltage level to restart the second UIM chipset.

19. The storage medium according to claim 13, wherein the storage medium is selected from the group consisting of a hard disk drive, a compact disc, a digital video disc, and a tape drive.