File read/write method and mobile terminal

• US 9,326,127 B2
• Filed: 12/31/2013
• Issued: 04/26/2016
• Est. Priority Date: 09/16/2011
• Status: Active Grant

• Current Assignee: Huawei Device Company Limited (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Device Company Limited (Huawei Investment & Holding Co., Ltd.)
• Inventors: Xu, Jiang
• Primary Examiner(s): Aminzay, Shaima Q
• Application Number:
  US14/145,274
• Publication Number:
  US 20140120985A1
• Time in Patent Office: 847 Days
• Field of Search: 455/558, 455/577, 455/556.1, 455/333, 455/411, 455/575.1, 455/414.1, 455/419, 455/435.1, 370/277, 370/329, 726/2, 726/9, 726/17, 726/20, 713/150, 713/193, 707/609, 707/621, 707/640
• US Class Current: 1/1
• CPC Class Codes: H04M 1/2757 by data transmission, e.g. downloading
• CPC Class Codes: H04M 2250/14 including a card reading device
• CPC Class Codes: H04W 8/183 Processing at user equipment or user record carrier

Abstract

A file read/write method includes: determining whether a file to be read/written is a large file, where the file to be read/written is a file to be written into a calling card of the mobile terminal or a file to be read from the calling card; when a determining result is yes, negotiating with the calling card a rate of reading/writing the large file, and replacing a standard rate with a high rate as a file read/write rate of the calling card; and reading the file to be read/written from the calling card or writing the file to be read/written into the calling card according to the high rate. In the present invention, the file transmission rate may be automatically modified according to the size of a file to be read/written, so as to effectively shorten time of large-file read/write performed with a calling card.

Claims

1. A file read/write method used in a mobile terminal, comprising:

determining whether a file to be read/written is a large file, wherein the file to be read/written is a file to be written into a calling card of the mobile terminal or a file to be read from the calling card;

when determining that the file to be read/written is the large file, negotiating with the calling card a rate of reading/writing the large file, and replacing a standard rate with a high rate as a file read/write rate of the calling card, wherein the rate of reading/writing the large file is negotiated by the mobile terminal sending an application protocol data unit (APDU) data packet to the calling card, wherein the APDU data packet comprises a command type of a current data frame, a rate negotiation instruction, and a new transmission rate value;

reading the file to be read/written from the calling card or writing the file to be read/written into the calling card according to the high rate; and

automatically recovering the standard rate when the reading or the writing according to the high rate is completed.

2. The method according to claim 1, wherein reading the file to be read/written from the calling card or writing the file to be read/written into the calling card according to the high rate, comprises:

modifying a crystal oscillation frequency of a file read/write clock of the calling card from a standard crystal oscillation frequency into a high rate crystal oscillation frequency according to the high rate; and

reading the file to be read/written from the calling card or writing the file to be read/written into the calling card according to the high rate crystal oscillation frequency.

3. The method according to claim 2, further comprising:

after the file is read/written, sending a rate recovery instruction to the calling card, and instructing the calling card to recover the file read/write rate to the standard rate; and

recovering a crystal oscillation frequency of a file read/write clock of the calling card to a standard crystal oscillation frequency.

4. The method according to claim 2, wherein the method is used in a startup procedure, a phone book initialization procedure, and a short message initialization procedure of the mobile terminal.

5. The method according to claim 1, further comprising:

after the file is read/written, sending a rate recovery instruction to the calling card, and instructing the calling card to recover the file read/write rate to the standard rate; and

recovering a crystal oscillation frequency of a file read/write clock of the calling card to a standard crystal oscillation frequency.

6. The method according to claim 2, wherein negotiating with the calling card the rate of reading/writing the large file, and replacing the standard rate with the high rate as the file read/write rate of the calling card, comprises receiving a rate negotiation success response returned by the calling card according to the APDU data packet, wherein the rate negotiation success response comprises two bytes.

7. The method according to claim 5, wherein negotiating with the calling card the rate of reading/writing the large file, and replacing the standard rate with the high rate as the file read/write rate of the calling card, comprises receiving a rate negotiation success response returned by the calling card according to the APDU data packet, wherein the rate negotiation success response comprises two bytes.

8. The method according to claim 5, wherein the method is used in a startup procedure, a phone book initialization procedure, and a short message initialization procedure of the mobile terminal.

9. The method according to claim 1, wherein negotiating with the calling card the rate of reading/writing the large file, and replacing the standard rate with the high rate as the file read/write rate of the calling card, comprises receiving a rate negotiation success response returned by the calling card according to the APDU data packet, wherein the rate negotiation success response comprises two bytes.

10. The method according to claim 9, wherein the method is used in a startup procedure, a phone book initialization procedure, and a short message initialization procedure of the mobile terminal.

11. The method according to claim 1, wherein the method is used in a startup procedure, a phone book initialization procedure, and a short message initialization procedure of the mobile terminal.

12. The method according to claim 1, wherein the calling card is a universal subscriber identity module (USIM) or subscriber identity module (SIM).

13. A mobile terminal connected to a calling card, comprising:

a computer processor configured to;

determine whether a file to be read/written is a large file, wherein the file to be read/written is a file to be written into the calling card or a file to be read from the calling card;

when a determining result is that the file to be read/written is the large file, negotiate with the calling card a rate of reading/writing the large file, and replace a standard rate with a high rate as a file read/write rate of the calling card, wherein the rate of reading/writing the large file is negotiated by the mobile terminal sending an application protocol data unit (APDU) data packet to the calling card, wherein the APDU data packet comprises a command type of a current data frame, a rate negotiation instruction, and a new transmission rate value;

read the file to be read/written from the calling card or write the file to be read/written into the calling card according to the high rate; and

automatically recover the standard rate when the reading or the writing according to the high rate is completed.

14. The mobile terminal according to claim 13, wherein the computer processor is configured to:

modify a crystal oscillation frequency of a file read/write clock of the calling card from a standard crystal oscillation frequency into a high rate crystal oscillation frequency according to the high rate; and

read the file to be read/written from the calling card or write the file to be read/written into the calling card according to the high rate crystal oscillation frequency.

15. The mobile terminal according to claim 14, wherein the computer processor is configured to:

after reading/writing the file, send a rate recovery instruction to the calling card, and instruct the calling card to recover the file read/write rate to the standard rate; and

recover a crystal oscillation frequency of a file read/write clock of the calling card to a standard crystal oscillation frequency.

16. The mobile terminal according to claim 14, wherein the computer processor is configured to receive a rate negotiation response returned by the calling card, and when the response is a rate negotiation success response, replace the standard rate with the high rate as the file read/write rate of the calling card, wherein the rate negotiation success response comprises two bytes.

17. The mobile terminal according to claim 13, wherein the computer processor is configured to:

after reading/writing the file, send a rate recovery instruction to the calling card, and instruct the calling card to recover the file read/write rate to the standard rate; and

recover a crystal oscillation frequency of a file read/write clock of the calling card to a standard crystal oscillation frequency.

18. The mobile terminal according to claim 17, wherein the computer processor is configured to receive a rate negotiation response returned by the calling card, and when the response is a rate negotiation success response, replace the standard rate with the high rate as the file read/write rate of the calling card, wherein the rate negotiation success response comprises two bytes.

19. The mobile terminal according to claim 13, wherein the computer processor is configured to receive a rate negotiation response returned by the calling card, and when the response is a rate negotiation success response, replace the standard rate with the high rate as the file read/write rate of the calling card, wherein the rate negotiation success response comprises two bytes.

20. The mobile terminal according to claim 13, wherein the calling card is a subscriber identity module (SIM) or universal subscriber identity module (USIM).