Enabling quick and easy demodulation

• US 9,480,074 B2
• Filed: 11/17/2014
• Issued: 10/25/2016
• Est. Priority Date: 07/23/2004
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Teague, Edward Harrison, Agrawal, Avneesh
• Primary Examiner(s): HAILE, AWET A
• Application Number:
  US14/543,721
• Publication Number:
  US 20150071234A1
• Time in Patent Office: 708 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: H04L 1/0003 by switching between different modulation schemes
• CPC Class Codes: H04L 1/0025 Transmission of mode-switching indication
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 1/0033 arrangements specific to the transmitter
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04W 72/542 using measured or perceived quality

Abstract

Methods and apparatus for transmitting modulation parameters are disclosed. The apparatus and methods provide determination of when a particular modulation scheme is used by an access point. One or more modulation parameters associated with the particular modulation scheme and one or more timing values associated with the particular modulation scheme are then determined and transmitted using a portion of a broadcast channel transmitted by the access point.

Claims

1. A method for communicating modulation parameters in a wireless communication system, the method comprising:

determining when a particular modulation scheme is to be used by an access point;

determining one or more modulation parameters associated with the particular modulation scheme and one or more timing values associated with the particular modulation scheme,

the one or more timing values indicating when the particular modulation scheme will take effect and a time duration of the particular modulation scheme; and

transmitting the determined one or more modulation parameters and the determined one or more timing values using a portion of a broadcast channel transmitted by the access point.

2. The method of claim 1, wherein the one or more timing values are determined based on at least one of a channel condition or a bit error rate.

3. The method of claim 1, wherein the one or more modulation parameters include an indication of a change of a cyclic prefix length.

4. The method of claim 1, wherein the determined one or more modulation parameters and the determined one or more timing values transmitted using the portion of the broadcast channel transmitted by the access point are capable of being received and utilized by an access terminal that is presently operating according to a modulation scheme different than the particular modulation scheme.

5. The method of claim 1, wherein the portion of the broadcast channel transmitted by the access point is a SYNC channel.

6. An apparatus for communicating modulation parameters in a wireless communication system, the apparatus comprising:

means for determining when a particular modulation scheme is to be used by an access point;

means for determining one or more modulation parameters associated with the particular modulation scheme and one or more timing values associated with the particular modulation scheme,

the one or more timing values indicating when the particular modulation scheme will take effect and a time duration of the particular modulation scheme; and

means for transmitting the determined one or more modulation parameters and the determined one or more timing values using a portion of a broadcast channel transmitted by the access point.

7. The apparatus of claim 6, wherein the one or more timing values are determined based on at least one of a channel condition or a bit error rate.

8. The apparatus of claim 6, wherein the one or more modulation parameters include an indication of a change of a cyclic prefix length.

9. The apparatus of claim 6, wherein the determined one or more modulation parameters and the determined one or more timing values transmitted using the portion of the broadcast channel transmitted by the access point are capable of being received and utilized by an access terminal that is presently operating according to a modulation scheme different than the particular modulation scheme.

10. The apparatus of claim 6, wherein the portion of the broadcast channel transmitted by the access point is a SYNC channel.

11. An apparatus comprising:

an electronic device comprising a processor and memory coupled to the processor, the electronic device configured to;

determine when a particular modulation scheme is to be used by an access point;

determine one or more modulation parameters associated with the particular modulation scheme and one or more timing values associated with the particular modulation scheme,

the one or more timing values indicating when the particular modulation scheme will take effect and a time duration of the particular modulation scheme; and

transmit the determined one or more modulation parameters and the determined one or more timing values using a portion of a broadcast channel transmitted by the access point.

12. The apparatus of claim 11, wherein the one or more timing values are determined based on at least one of a channel condition or a bit error rate.

13. The apparatus of claim 11, wherein the one or more modulation parameters include an indication of a change of a cyclic prefix length.

14. The apparatus of claim 11, wherein the determined one or more modulation parameters and the determined one or more timing values transmitted using the portion of the broadcast channel transmitted by the access point are capable of being received and utilized by an access terminal that is presently operating according to a modulation scheme different than the particular modulation scheme.

15. The apparatus of claim 11, wherein the portion of the broadcast channel transmitted by the access point is a SYNC channel.

16. A non-transitory machine-readable medium comprising instructions which, when executed by a processor, cause the processor to:

determine when a particular modulation scheme is to be used by an access point;

determine one or more modulation parameters associated with the particular modulation scheme and one or more timing values associated with the particular modulation scheme,

the one or more timing values indicating when the particular modulation scheme will take effect and a time duration of the particular modulation scheme; and

transmit the determined one or more modulation parameters and the determined one or more timing values using a portion of a broadcast channel transmitted by the access point.

17. The non-transitory machine-readable medium of claim 16, wherein the one or more modulation parameters include an indication of a change of a cyclic prefix length.

18. The non-transitory machine-readable medium of claim 16, wherein the one or more timing values are determined based on at least one of a channel condition or a bit error rate.

19. The non-transitory machine-readable medium of claim 16, wherein the determined one or more modulation parameters and the determined one or more timing values transmitted using the portion of the broadcast channel transmitted by the access point are capable of being received and utilized by an access terminal that is presently operating according to a modulation scheme different than the particular modulation scheme.

20. The non-transitory machine-readable medium of claim 16, wherein the portion of the broadcast channel transmitted by the access point is a SYNC channel.