VALIDATION OF STORED OR INCOMING MESSAGES

• US 20090274301A1
• Filed: 05/05/2008
• Published: 11/05/2009
• Est. Priority Date: 05/05/2008
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Van Melle, Ehren J.D., Otte, Kurt W.
• Granted Patent: US 8,498,416 B2
• Time in Patent Office: Days
• US Class Current: 380/270
• CPC Class Codes: H04L 2209/34 Encoding or coding, e.g. Huffman coding or error correction
• CPC Class Codes: H04L 2209/80 Wireless network architectures or network communication protocols for wireless network security H04W12/00
• CPC Class Codes: H04L 25/03866 using scrambling
• CPC Class Codes: H04L 9/3247 involving digital signatures

Abstract

A mobile device can save time by validating a stored message, which was previously unreadable, by utilizing a related message, which can be received at a much quicker rate. In accordance with some aspects, the mobile device can save time by validating the stored message by reading a new related message and subsequently re-reading or descrambling the stored message or its CRC. The first attempt to read the message might not be successful due to a scrambling information change or due to other reasons. The reason for the failure of the first attempt to read the message may be determined based on whether a later attempt to read the message with the same or a different scrambling information is successful.

Claims

1. A method for validating stored or incoming messages, comprising:

determining that a message was not successfully read after a first attempt;

retaining the message as unreadable;

obtaining scrambling information;

attempting to re-read the message with the obtained scrambling information; and

ascertaining whether the message was not successfully read after the first attempt due to a scrambling information change or due to a reason different from the scrambling information change.

2. The method of claim 1, wherein it is ascertained that the message was not successfully read after the first attempt due to an unknown scrambling change if the attempt to re-read the message succeeds with different scrambling information.

3. The method of claim 1, wherein it is ascertained that the message was not successfully read after the first attempt due to the reason different from the scrambling information change if the attempt to re-read the message succeeds with original scrambling information.

4. The method of claim 1, the unreadable message is validated if the re-read attempt is successful.

5. The method of claim 1, the scrambling information is obtained from a first source, wherein the retained unreadable message is a different source.

6. A wireless communications apparatus, comprising:

a memory that retains instructions related to determining that a message was not successfully read after a first attempt, retaining the message as unreadable, obtaining a scrambling information, attempting to re-read the message with the obtained scrambling information, and ascertaining whether the message was not successfully read after the first attempt due to a scrambling information change or due to a reason not related to the scrambling information change; and

a processor, coupled to the memory, configured to execute the instructions retained in the memory.

7. The wireless communications apparatus of claim 6, wherein the message was not successfully read after the first attempt due to an unknown scrambling change if the attempt to re-read the message succeeds with different scrambling information.

8. The wireless communications apparatus of claim 6, wherein the message was not successfully read after the first attempt due to the reason not related to the scrambling information change if the attempt to re-read the message succeeds with original scrambling information

9. The wireless communications apparatus of claim 6, the unreadable message is validated if the re-read attempt is successful.

10. The wireless communications apparatus of claim 6, the scrambling information is obtained from a first source, wherein the retained unreadable message is a different source.

11. A wireless communications apparatus that facilitates validation of messages, comprising:

means for determining that a message was not successfully read after a first attempt;

means for retaining the message as unreadable;

means for obtaining a scrambling information;

means for attempting to re-read the message with the obtained scrambling information; and

means for ascertaining whether the message was not successfully read after the first attempt due to a scrambling information change or due to a reason different from the scrambling information change.

12. The wireless communications apparatus of claim 11, the message was not successfully read after the first attempt due to an unknown scrambling change if the attempt to re-read the message succeeds with different scrambling information.

13. The wireless communications apparatus of claim 11, wherein the message was not successfully read after the first attempt due to the reason different from the scrambling information change if the attempt to re-read the message succeeds with an original scrambling information

14. The wireless communications apparatus of claim 11, the unreadable message is validated if the re-read attempt is successful.

15. The wireless communications apparatus of claim 11, the scrambling information is obtained from a first source, wherein the retained unreadable message is a different source.

16. A machine-readable medium having stored thereon machine-executable instructions for validation of messages, comprising:

determining that a message was not successfully read after a first attempt;

retaining the message as unreadable;

obtaining a scrambling information;

attempting to re-read the message with the obtained scrambling information; and

ascertaining whether the message was not successfully read after the first attempt due to a scrambling information change or due to a reason different from the scrambling information change.

17. The machine-readable medium of claim 16, the instructions further comprising determining that the message was not successfully read after the first attempt due to an unknown scrambling change if the attempt to re-read the message succeeds with different scrambling information.

18. The machine-readable medium of claim 16, the instructions further comprising determining that the message was not successfully read after the first attempt due to a reason different from the scrambling information change if the attempt to re-read the message succeeds with an original scrambling information.

19. The machine-readable medium of claim 16, the unreadable message is validated if the re-read attempt is successful.

20. The machine-readable medium of claim 16, the scrambling information is obtained from a first source, wherein the retained unreadable message is a different source.

21. At least one processor for validating messages, comprising:

a first module operable to determine that a message was not successfully read after a first attempt;

a second module operable to retain the message as unreadable;

a third module operable to obtain a scrambling information;

a fourth module operable to attempt to re-read the message with the obtained scrambling information; and

a fifth module operable to determine whether the message was not successfully read after the first attempt due to a scrambling information change or due to a reason not related to the scrambling information change.

22. The at least one processor of claim 21, wherein it is ascertained that the message was not successfully read after the first attempt due to an unknown scrambling change if the attempt to re-read the message succeeds with different scrambling information.

23. The at least one processor of claim 21, wherein it is ascertained that the message was not successfully read after the first attempt due to a reason not related to the scrambling information change if the attempt to re-read the message succeeds with an original scrambling information.