Systems, methods and apparatus for determining control field and modulation coding scheme information

• US 9,831,983 B2
• Filed: 09/28/2011
• Issued: 11/28/2017
• Est. Priority Date: 09/29/2010
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Sampath, Hemanth, Merlin, Simone, Wentink, Maarten Menzo, Abraham, Santosh Paul
• Primary Examiner(s): Patel, Parth
• Application Number:
  US13/247,100
• Publication Number:
  US 20120250796A1
• Time in Patent Office: 2,253 Days
• Field of Search: 370466, 370310, 370267, 370441, 370338, 370476, 370328
• CPC Class Codes: H04L 1/0003 by switching between different modulation schemes
• CPC Class Codes: H04L 1/0009 by adapting the channel coding H04L1/1812 takes precedence
• CPC Class Codes: H04L 1/0025 Transmission of mode-switching indication
• CPC Class Codes: H04L 1/0028 Formatting
• CPC Class Codes: H04L 1/0031 Multiple signaling transmission H04L1/1664, F15 take precedence
• CPC Class Codes: H04L 1/0039 other detection of signalling, e.g. detection of TFCI explicit signalling H04L1/0046, H04L27/0012 and H04L25/0262 take precedence
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT

Abstract

Systems, method and apparatus of managing wireless communication are described herein.

Claims

1. A method of wireless communication, comprising:

receiving a data unit comprising a first indicator signifying whether a control field is present in the data unit;

determining that the control field is present based on the first indicator;

determining whether the control field is a first type of control field or a second type of control field based at least in part on a second indicator in the control field; and

processing the control field based on the type of the control field.

2. The method of claim 1, wherein the second indicator is the first bit of the control field.

3. The method of claim 1, wherein the second indicator indicates whether the control field type is very high throughput (VHT) or high throughput (HT).

4. The method of claim 1, wherein the second indicator is a reserved bit in the control field.

5. The method of claim 1, wherein the first indicator is an order bit.

6. The method of claim 5, wherein the order bit is included in a MAC header in the data unit.

7. The method of claim 6, wherein the order bit is included in a frame control field of the MAC header.

8. The method of claim 6, wherein the control field comprises an HT control field in the MAC header.

9. The method of claim 1, wherein the data unit comprises a physical layer protocol data unit (PPDU).

10. The method of claim 1, further comprising determining a modulation coding scheme (MCS) based on the control field.

11. The method of claim 1, further comprising transmitting a request for MCS feedback, wherein the data unit is received in response to the request.

12. An apparatus for wireless communication, comprising:

a receiver configured to receive a data unit comprising a first indicator signifying whether a control field is present in the data unit; and

a processing system configured to;

if the first indicator signifies that the control field is present, determine whether the control field is a first type of control field or a second type of control field based at least in part on a second indicator in the control field; and

process the control field based on the type of the control field.

13. The apparatus of claim 12, wherein the second indicator is the first bit of the control field.

14. The apparatus of claim 12, wherein the second indicator indicates whether the control field type is very high throughput (VHT) or high throughput (HT).

15. The apparatus of claim 12, wherein the second indicator is a reserved bit in the control field.

16. The apparatus of claim 12, wherein the first indicator is an order bit.

17. The apparatus of claim 16, wherein the order bit is included in a MAC header in the data unit.

18. The apparatus of claim 17, wherein the order bit is included in a frame control field of the MAC header.

19. The apparatus of claim 17, wherein the control field comprises an HT control field in the MAC header.

20. The apparatus of claim 12, wherein the data unit comprises a physical layer protocol data unit (PPDU).

21. The apparatus of claim 12, wherein the processing system is further configured to determine a modulation coding scheme (MCS) based on the control field.

22. The apparatus of claim 12, further comprising a transmitter configured to transmit a request for MCS feedback, wherein the data unit is received in response to the request.

23. An apparatus for wireless communication, comprising:

means for receiving a data unit comprising a first indicator signifying whether a control field is present in the data unit;

means for determining, if the first indicator signifies that the control field is present, whether the control field is a first type of control field or a second type of control field based at least in part on a second indicator in the control field; and

means for processing the control field based on the type of the control field.

24. The apparatus of claim 23, wherein the second indicator is the first bit of the control field.

25. The apparatus of claim 23, wherein the second indicator indicates whether the control field type is very high throughput (VHT) or high throughput (HT).

26. The apparatus of claim 23, wherein the second indicator is a reserved bit in the control field.

27. The apparatus of claim 23, wherein the first indicator is an order bit.

28. The apparatus of claim 27, wherein the order bit is included in a MAC header in the data unit.

29. The apparatus of claim 28, wherein the order bit is included in a frame control field of the MAC header.

30. The apparatus of claim 28, wherein the control field comprises an HT control field in the MAC header.

31. The apparatus of claim 23, wherein the data unit comprises a physical layer protocol data unit (PPDU).

32. The apparatus of claim 23, further comprising means for determining a modulation coding scheme (MCS) based on the control field.

33. The apparatus of claim 23, further comprising means for transmitting a request for MCS feedback, wherein the data unit is received in response to the request.

34. A non-transitory computer readable medium comprising instructions that when executed cause an apparatus to:

receive a data unit comprising a first indicator signifying whether a control field is present in the data unit;

if the first indicator signifies that the control field is present, determine whether the control field is a first type of control field or a second type of control field based at least in part on a second indicator in the control field; and

process the control field based on the type of the control field.

35. A user terminal, comprising:

at least one antenna;

a receiver configured to receive, via the antenna, a data unit comprising a first indicator signifying whether a control field is present in the data unit; and

a processing system configured to;

if the first indicator signifies that the control field is present, determine whether the control field is a first type of control field or a second type of control field based at least in part on a second indicator in the control field; and

process the control field based on the type of the control field.