Frame formatting for communications within single user, multiple user, multiple access, and/or MIMO wireless communications

• US 9,923,999 B2
• Filed: 10/30/2015
• Issued: 03/20/2018
• Est. Priority Date: 04/26/2012
• Status: Active Grant

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Avago Technologies General IP PTE Limited (Broadcom, Inc.)
• Inventors: Porat, Ron
• Primary Examiner(s): LEVITAN, DMITRY
• Application Number:
  US14/927,813
• Publication Number:
  US 20160112547A1
• Time in Patent Office: 872 Days
• Field of Search: 370310, 370328, 370329, 370431, 370464, 370465, 455422, 455450
• CPC Class Codes: H04L 27/2613 Structure of the reference signals
• CPC Class Codes: H04L 5/0005 Time-frequency
• CPC Class Codes: H04L 69/22 Parsing or analysis of headers
• CPC Class Codes: H04W 72/04 Wireless resource allocation

Abstract

Frame formatting for communications within single user, multiple user, multiple access, and/or MIMO wireless communications. A signal is processed within a communication device using at least two respective downclocking ratios (e.g., a first downclocking ratio applied to a first portion of the signal such as a frame or packet extracted there from, a second downclocking ratio applied to a second portion of the signal). Alternatively, a signal is divided into more than two respective portions, and different respective downclocking ratios are applied to those different respective portions (e.g., a first downclocking ratio applied to a first portion of the signal, and so on up to an n-th downclocking ratio applied to an n-th portion of the signal). Some implementations apply a singular or common downclocking ratio to more than one portion of the signal (which may be contiguous/adjacent or non-contiguous/non-adjacent within the signal).

Claims

1. A wireless communication device comprising:

a communication interface; and

processing circuitry that is coupled to the communication interface, wherein at least one of the communication interface or the processing circuitry configured to;

receive a signal from another wireless communication device via a communication channel having a channel bandwidth;

process a first at least one orthogonal frequency division multiplexing (OFDM) symbol of an OFDM packet of the signal based on a first clock signal;

downclock the first clock signal using a downclocking factor to generate a second clock signal;

process a second at least one OFDM symbol of the OFDM packet based on the second clock signal to extend OFDM symbol duration of the second at least one OFDM symbol of the OFDM packet;

downclock the first clock signal using another downclocking factor to generate a third clock signal; and

process a third at least one OFDM symbol of the OFDM packet based on the third clock signal to extend OFDM symbol duration of the third at least one OFDM symbol of the OFDM packet by a different symbol extension amount than the second at least one OFDM symbol of the OFDM packet.

2. The wireless communication device of claim 1, wherein the at least one of the communication interface or the processing circuitry is further configured to:

receive another signal from the another wireless communication device via the communication channel having the channel bandwidth;

process a fourth at least one OFDM symbol of another OFDM packet of the another signal based on the first clock signal;

downclock the first clock signal using at least one other downclocking factor to generate a fourth clock signal; and

process a fifth at least one OFDM symbol of the another OFDM packet based on the fourth clock signal to extend OFDM symbol duration of the fifth at least one OFDM symbol of the another OFDM packet.

3. The wireless communication device of claim 1, wherein:

the first OFDM symbol of the OFDM packet includes at least one signal field (SIG); and

the second OFDM symbol of the OFDM packet includes at least one data field.

4. The wireless communication device of claim 1, wherein the wireless communication device or the another wireless communication device includes a laptop host computer, a personal digital assistant host, a personal computer host or cellular telephone host.

5. The wireless communication device of claim 1, wherein:

the first at least one OFDM symbol of the OFDM packet includes at least one signal field (SIG);

the second at least one OFDM symbol of the OFDM packet includes at least one of at least one short training field (STF) or at least one long training field (LTF); and

the third at least one OFDM symbol of the OFDM packet includes at least one data field.

6. The wireless communication device of claim 1, wherein the at least one of the communication interface or the processing circuitry is further configured to:

receive the signal from the another wireless communication device via the communication channel having a 20 MHz channel bandwidth;

downclock the first clock signal using a first downclocking factor of 2 to generate the second clock signal;

process the second at least one OFDM symbol of the OFDM packet based on the second clock signal to extend the OFDM symbol duration of the second at least one OFDM symbol of the OFDM packet by 2;

downclock the first clock signal using a second downclocking factor of 4 to generate a fourth clock signal; and

process a fifth at least one OFDM symbol of the OFDM packet based on the fourth clock signal to extend OFDM symbol duration of the fifth at least one OFDM symbol of the OFDM packet by 4.

7. The wireless communication device of claim 1 further comprising:

an access point (AP), wherein the another wireless communication device includes a wireless station (STA).

8. The wireless communication device of claim 1 further comprising:

a wireless station (STA), wherein the another wireless communication device includes an access point (AP).

9. A wireless communication device comprising:

a communication interface; and

processing circuitry that is coupled to the communication interface, wherein at least one of the communication interface or the processing circuitry configured to;

receive a signal from another wireless communication device via a communication channel having a 20 MHz channel bandwidth;

process a first at least one orthogonal frequency division multiplexing (OFDM) symbol of an OFDM packet of the signal based on a first clock signal;

downclock the first clock signal using a first downclocking factor of 2 to generate a second clock signal;

process a second at least one OFDM symbol of the OFDM packet based on the second clock signal to extend OFDM symbol duration of the second at least one OFDM symbol of the OFDM packet by 2;

downclock the first clock signal using a second downclocking factor of 4 to generate a third clock signal; and

process a third at least one OFDM symbol of the OFDM packet based on the third clock signal to extend OFDM symbol duration of the third at least one OFDM symbol of the OFDM packet by 4.

10. The wireless communication device of claim 9, wherein:

the first OFDM symbol of the OFDM packet includes at least one signal field (SIG);

the second OFDM symbol of the OFDM packet includes at least one of at least one short training field (STF) or at least one long training field (LTF); and

the third OFDM symbol of the OFDM packet includes at least one data field.

11. The wireless communication device of claim 9, wherein the at least one of the communication interface or the processing circuitry is further configured to:

receive another signal from the another wireless communication device via the communication channel having the 20 MHz channel bandwidth;

process a third at least one OFDM symbol of another OFDM packet of the another signal based on the first clock signal;

process a fourth at least one OFDM symbol of the another OFDM packet based on the second clock signal to extend OFDM symbol duration of the second at least one OFDM symbol of the OFDM packet by 2;

process a fifth at least one OFDM symbol of the another OFDM packet based on the third clock signal to extend OFDM symbol duration of the second at least one OFDM symbol of the OFDM packet by 4; and

process a sixth at least one OFDM symbol of the another OFDM packet based on the third clock signal to extend OFDM symbol duration of the second at least one OFDM symbol of the OFDM packet by 4.

12. The wireless communication device of claim 9 further comprising:

an access point (AP), wherein the another wireless communication device includes a wireless station (STA).

13. The wireless communication device of claim 9 further comprising:

a wireless station (STA), wherein the another wireless communication device includes an access point (AP).

14. A method for execution by a wireless communication device, the method comprising:

receiving, via a communication interface of the wireless communication device, a signal from another wireless communication device via a communication channel having a channel bandwidth;

processing a first at least one orthogonal frequency division multiplexing (OFDM) symbol of an OFDM packet of the signal based on a first clock signal;

downclocking the first clock signal using a downclocking factor to generate a second clock signal; and

processing a second at least one OFDM symbol of the OFDM packet based on the second clock signal to extend OFDM symbol duration of the second at least one OFDM symbol of the OFDM packet;

receiving, via the communication interface of the wireless communication device, another signal from the another wireless communication device via the communication channel having the channel bandwidth;

processing a third at least one OFDM symbol of another OFDM packet of the another signal based on the first clock signal;

downclocking the first clock signal using another downclocking factor to generate a third clock signal; and

processing a fourth at least one OFDM symbol of the another OFDM packet based on the third clock signal to extend OFDM symbol duration of the fourth at least one OFDM symbol of the another OFDM packet.

15. The method of claim 14, wherein:

the first OFDM symbol of the OFDM packet includes at least one signal field (SIG); and

the second OFDM symbol of the OFDM packet includes at least one data field.

16. The method of claim 14 further comprising:

downclocking the first clock signal using at least one other downclocking factor to generate a fourth clock signal; and

processing a fifth at least one OFDM symbol of the OFDM packet based on the fourth clock signal to extend OFDM symbol duration of the fifth at least one OFDM symbol of the OFDM packet by a different symbol extension amount than the second at least one OFDM symbol of the OFDM packet.

17. The method of claim 16, wherein:

the first at least one OFDM symbol of the OFDM packet includes at least one signal field (SIG);

the second at least one OFDM symbol of the OFDM packet includes at least one of at least one short training field (STF) or at least one long training field (LTF); and

the third at least one OFDM symbol of the OFDM packet includes at least one data field.

18. The method of claim 14 further comprising:

receiving, via the communication interface of the wireless communication device, the signal from the another wireless communication device via the communication channel having a 20 MHz channel bandwidth;

downclocking the first clock signal using a first downclocking factor of 2 to generate the second clock signal;

processing the second at least one OFDM symbol of the OFDM packet based on the second clock signal to extend the OFDM symbol duration of the second at least one OFDM symbol of the OFDM packet by 2;

downclocking the first clock signal using a second downclocking factor of 4 to generate a fourth clock signal; and

processing a fifth at least one OFDM symbol of the OFDM packet based on the fourth clock signal to extend OFDM symbol duration of the fifth at least one OFDM symbol of the OFDM packet by 4.

19. The method of claim 14, wherein the wireless communication device includes a wireless station (STA), and the another wireless communication device includes an access point (AP).

20. A wireless communication device comprising:

a communication interface; and

processing circuitry that is coupled to the communication interface, wherein at least one of the communication interface or the processing circuitry configured to;

receive a signal from another wireless communication device via a communication channel having a 20 MHz channel bandwidth;

process a first at least one orthogonal frequency division multiplexing (OFDM) symbol of an OFDM packet of the signal based on a first clock signal;

downclock the first clock signal using a downclocking factor of 2 to generate a second clock signal;

process a second at least one OFDM symbol of the OFDM packet based on the second clock signal to extend OFDM symbol duration of the second at least one OFDM symbol of the OFDM packet by 2;

downclock the first clock signal using a second downclocking factor of 4 to generate a third clock signal; and

process a third at least one OFDM symbol of the OFDM packet based on the third clock signal to extend OFDM symbol duration of the third at least one OFDM symbol of the OFDM packet by 4.