IP Library › Granted Patent US 8,284,800
Granted Patent B2
US 8,284,800 · App. 12/498,184 · Granted Oct 9, 2012

OFDM communications using bit allocation tables

Assignee: Intel Corporation
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Quick Facts
Patent No.
US 8,284,800
App. No.
12/498,184
Granted
Oct 9, 2012
Kind
B2
Abstract

Messages transmitted between a receiver and a transmitter are used to maximize a communication data rate. In particular, a multicarrier modulation system uses messages that are sent from the receiver to the transmitter to exchange one or more sets of optimized communication parameters. The transmitter then stores these communication parameters and when transmitting to that particular receiver, the transmitter utilizes the stored parameters in an effort to maximize the data rate to that receiver. Likewise, when the receiver receives packets from that particular transmitter, the receiver can utilize the stored communication parameters for reception.

Claims (49)

1. A packet communication method in a multicarrier communications environment comprising:

transmitting or receiving, by a transceiver, a first packet that includes a header portion and a data portion, wherein the header portion includes information indicating a first allocation of data bits to subcarriers for the data portion of the first packet, and the first allocation of data bits to subcarriers allocates the same number of data bits on a plurality of subcarriers, used for transmitting or receiving the first packet;

receiving or transmitting a second packet, wherein the second packet includes information indicating a second allocation of data bits to subcarriers to be used for transmitting or receiving a third packet, wherein the second allocation is different than the first allocation; and

transmitting or receiving the third packet that includes a header portion and a data portion, wherein:

the header portion of the third packet includes information indicating the second allocation of data bits to subcarriers for the data portion of the third packet, and the second allocation of data bits to subcarriers allocates more data bits to at least one subcarrier, used for transmitting or receiving the third packet, than to at least one other subcarrier, used for transmitting or receiving the third packet.

2. The method of claim 1 , wherein the second packet is an acknowledgement packet.

3. The method of claim 1 , wherein the second packet is a management frame.

4. The method of claim 1 , wherein the second packet is a data frame.

5. The method of claim 1 , wherein the second allocation is determined based on a signal-to-noise (SNR) calculation wherein at least two subcarriers have a different SNR.

6. The method of claim 1 , wherein the second packet is a message.

7. The method of claim 1 , wherein the transceiver includes an ASIC.

8. The method of claim 1 , wherein the transceiver includes a digital signal processor.

9. A system for packet communication in a multicarrier communications environment comprising:

means for transmitting or receiving a first packet that includes a header portion and a data portion, wherein the header portion includes information indicating a first allocation of data bits to subcarriers for the data portion of the first packet, and the first allocation of data bits to subcarriers allocates the same number of data bits on a plurality of subcarriers, used for transmitting or receiving the first packet;

means for receiving or transmitting a second packet, wherein the second packet includes information indicating a second allocation of data bits to subcarriers to be used for transmitting or receiving a third packet, wherein the second allocation is different than the first allocation; and

means for transmitting or receiving the third packet that includes a header portion and a data portion, wherein:

the header portion of the third packet includes information indicating the second allocation of data bits to subcarriers for the data portion of the third packet, and the second allocation of data bits to subcarriers allocates more data bits to at least one subcarrier, used for transmitting or receiving the third packet, than to at least one other subcarrier, used for transmitting or receiving the third packet.

10. The system of claim 9 , wherein the second packet is an acknowledgement packet.

11. The system of claim 9 , wherein the second packet is a management frame.

12. The system of claim 9 , wherein the second packet is a data frame.

13. The system of claim 9 , wherein the second allocation is determined based on a signal-to-noise (SNR) calculation wherein at least two subcarriers have a different SNR.

14. The system of claim 9 , wherein the second packet is a message.

15. The system of claim 9 , wherein the means for transmitting or receiving the first packet includes an ASIC.

16. The system of claim 9 , wherein the means for transmitting or receiving the first packet includes a digital signal processor.

17. A system capable of communicating packets in a multicarrier communications environment comprising:

a transceiver capable of:

transmitting or receiving a first packet that includes a header portion and a data portion, wherein the header portion includes information indicating a first allocation of data bits to subcarriers for the data portion of the first packet, and the first allocation of data bits to subcarriers allocates the same number of data bits on a plurality of subcarriers, used for transmitting or receiving the first packet;

receiving or transmitting a second packet, wherein the second packet includes information indicating a second allocation of data bits to subcarriers to be used for transmitting or receiving a third packet, wherein the second allocation is different than the first allocation; and

transmitting or receiving the third packet that includes a header portion and a data portion, wherein:

the header portion of the third packet includes information indicating the second allocation of data bits to subcarriers for the data portion of the third packet, and the second allocation of data bits to subcarriers allocates more data bits to at least one subcarrier, used for transmitting or receiving the third packet, than to at least one other subcarrier, used for transmitting or receiving the third packet.

18. The system of claim 17 , wherein the second packet is an acknowledgement packet.

19. The system of claim 17 , wherein the second packet is a management frame.

20. The system of claim 17 , wherein the second packet is a data frame.

21. The system of claim 17 , wherein the second allocation is determined based on a signal-to-noise (SNR) calculation wherein at least two subcarriers have a different SNR.

22. The system of claim 17 , wherein the second packet is a message.

23. The system of claim 17 , wherein the transceiver includes an ASIC.

24. The system of claim 17 , wherein the transceiver includes a digital signal processor.

25. A non-transitory computer-readable information storage media having stored thereon instructions, that when executed by a computer, cause to be performed a packet communication method in a multicarrier communications environment comprising:

transmitting or receiving, by a transceiver, a first packet that includes a header portion and a data portion, wherein the header portion includes information indicating a first allocation of data bits to subcarriers for the data portion of the first packet, and the first allocation of data bits to subcarriers allocates the same number of data bits on a plurality of subcarriers, used for transmitting or receiving the first packet;

receiving or transmitting a second packet, wherein the second packet includes information indicating a second allocation of data bits to subcarriers to be used for transmitting or receiving a third packet, wherein the second allocation is different than the first allocation; and

transmitting or receiving the third packet that includes a header portion and a data portion, wherein:

the header portion of the third packet includes information indicating the second allocation of data bits to subcarriers for the data portion of the third packet, and the second allocation of data bits to subcarriers allocates more data bits to at least one subcarrier, used for transmitting or receiving the third packet, than to at least one other subcarrier, used for transmitting or receiving the third packet.

26. The media of claim 25 , wherein the second packet is an acknowledgement packet.

27. The media of claim 25 , wherein the second packet is a management frame.

28. The media of claim 25 , wherein the second packet is a data frame.

29. The media of claim 25 , wherein the second allocation is determined based on a signal-to-noise (SNR) calculation wherein at least two subcarriers have a different SNR.

30. The media of claim 25 , wherein the second packet is a message.

31. The media of claim 25 , wherein the transceiver includes an ASIC.

32. The media of claim 25 , wherein the transceiver includes a digital signal processor.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 13, 2012
From: AWARE, INC.
To: INTEL CORPORATION
Reel/Frame 028546/0199 →
Continuity (4)
Continuation 11931791 · Oct 31, 2007
Division 10382921 · Mar 7, 2003
Provisional Application 60363218 · Mar 8, 2002
Related Publication 20090268832A1 · Oct 29, 2009