Structure for low-power-low-rate data transmission

1. A system for detecting data received in a low power low rate (LPLR) data frame format, comprising:

a receiver configured to;

receive, via an uplink transmission, a data frame comprising an LPLR preamble portion having a duration that allows sufficient time for processing the data frame when no trigger message is received and the uplink transmission is unsolicited and an LPLR data portion following the LPLR preamble portion,

wherein the LPLR preamble portion and the LPLR data portion occupy a bandwidth that is less than an allowed bandwidth; and

control circuitry configured to:

determine a mode of the data frame based on whether the data frame has an additional legacy preamble portion,

in response to determining the data frame has a mixed mode:

identify the additional legacy preamble portion transmitted on the allowed bandwidth,

identify the LPLR preamble portion and the LPLR data portion transmitted on a first bandwidth less than the allowed bandwidth, following the additional legacy portion,

identify a duplicated LPLR preamble portion and a duplicated LPLR data portion transmitted in parallel with the LPLR preamble portion and the LPLR data portion on a second bandwidth less than the allowed bandwidth, following the additional legacy portion;

determine whether a trigger message was transmitted to solicit the uplink transmission prior to the uplink transmission;

identify, from the LPLR preamble portion, a short-training field that is adaptively configured based on whether the uplink transmission is solicited or unsolicited; and

detect a data field in the LPLR preamble portion from the data frame based on the mode of the data frame.

2. The system of claim 1 , wherein the allowed bandwidth is 20 MHz and the LPLR data frame format is transmitted at a frequency above 1 GHz.

3. The system of claim 1 , wherein the data format further comprises the legacy preamble portion that precedes the LPLR preamble portion and occupies the allowed bandwidth.

4. The s stem of claim 1 , wherein the mode includes any of the mixed mode or a single mode, and wherein the mixed mode includes the legacy preamble portion that precedes the LPLR preamble portion and occupies the allowed bandwidth, and the single mode includes only the LPLR preamble portion and the LPLR data portion.

5. The system of claim 1 , wherein the LPLR preamble portion and the LPLR data portion are duplicated in the frequency domain to occupy the allowed bandwidth.

6. The system of claim 1 , wherein the LPLR preamble portion and the LPLR data portion are duplicated in the frequency domain to occupy a total bandwidth that is less than the allowed bandwidth, and a frequency gap separates adjacent duplicates of the LPLR preamble portion and the LPLR data portion.

7. The system of claim 1 , wherein the data field comprises any of an LPLR short training field, an LPLR long training field, and an LPLR signaling field.

8. The system of claim 7 , wherein the LPLR long training field is duplicated at least N times in the time domain.

9. The system of claim 8 , wherein the LPLR long training field is duplicated a first N times in the time domain to form a first set of duplicates that are transmitted over even tones, the LPLR long training field is duplicated a second N times in the time domain to form a second set of duplicates that are transmitted over odd tones.

10. A method of detecting data received in a low power low rate (LPLR) data frame format, comprising:

receiving, at a wireless receiver via an uplink transmission, a data frame comprising an LPLR preamble portion having a duration that allows sufficient time for processing the data frame when no trigger message is received and the uplink transmission is unsolicited and an LPLR data portion following the LPLR preamble portion, wherein the LPLR preamble portion and the LPLR data portion occupy a bandwidth that is less than an allowed bandwidth;

determining, via control circuitry, a mode of the data frame based on whether the data frame has an additional legacy preamble portion;

in response to determining the data frame has a mixed mode:

identifying the additional legacy preamble portion transmitted on the allowed bandwidth,

identifying the LPLR preamble portion and the LPLR data portion transmitted on a first bandwidth less than the allowed bandwidth, following the additional legacy portion, and

identifying a duplicated LPLR preamble portion and a duplicated LPLR data portion transmitted in parallel with the LPLR preamble portion and the LPLR data portion on a second bandwidth less than the allowed bandwidth, following the additional legacy portion;

determining whether a trigger message was transmitted to solicit the uplink transmission prior to the uplink transmission;

identifying, from the LPLR preamble portion, a short-training field that is adaptively configured based on whether the uplink transmission is solicited or unsolicited; and

detecting, via the control circuitry, a data field in the LPLR preamble portion from the data frame based on the mode of the data frame.

11. The method of claim 10 , wherein the allowed bandwidth is 20 MHz and the LPLR data frame format is received at a frequency above 1 GHz.

12. The method of claim 10 , wherein the data frame further comprises the legacy preamble portion that precedes the LPLR preamble portion and occupies the allowed bandwidth.

13. The method of claim 10 , wherein the mode includes any of the mixed mode or a single mode, and wherein the mixed mode includes the legacy preamble portion that precedes the LPLR preamble portion and occupies the allowed bandwidth, and the single mode includes only the LPLR preamble portion and the LPLR data portion.

14. The method of claim 10 , further comprising determining that the LPLR preamble portion and the LPLR data portion are duplicated in the frequency domain to occupy the allowed bandwidth.

15. The method of claim 10 , further comprising:

determining that the LPLR preamble portion and the LPLR data portion are duplicated in the frequency domain to occupy a total bandwidth that is less than the allowed bandwidth; and

determining that a frequency gap separates adjacent duplicates of the LPLR preamble portion and the LPLR data portion.

16. The method of claim 10 , wherein the data field comprises any of an LPLR short training field, an LPLR long training field, and an LPLR signaling field.

17. The method of claim 16 , further comprising determining that the LPLR long training field is duplicated at least N times in the time domain.

18. The method of claim 17 , wherein the LPLR long training field is duplicated a first N times in the time domain to form a first set of duplicates that are received over even tones, the LPLR long training field is duplicated a second N times in the time domain to form a second set of duplicates that are received over odd tones.