Backoff snooze wake power consumption within single user, multiple user, multiple access, and/or MIMO wireless communications
View Patent ↗Backoff snooze wake power consumption within single user, multiple user, multiple access, and/or MIMO wireless communications. If a communication (e.g., transmission) attempt fails (e.g., by a wireless station (STA), smart meter station (SMSTA), etc.), then a backoff snooze countdown may be performed before a subsequent communication is attempted. Also, if communication activity is detected on the communication medium, then such a backoff snooze countdown may be performed before monitoring the communication medium or a subsequent communication attempt is made. Such a backoff snooze countdown may be based on a codeword value (e.g., such as provided within a beacon received from an access point (AP)), and different respective backoff snooze countdowns may be made based on different respective codeword values. Such backoff snooze countdowns are performed outside of a restricted access window (RAW) in which only devices of a particular class (e.g., low-power, Z, etc.) have access to the communication medium.
1. A smart meter station (SMSTA) comprising:
a communication interface; and
a processor, at least one of the communication interface or the processor configured to:
receive, from a wireless communication device via a wireless communication medium, a signal that identifies at least one wireless communication device and specifies a time period during which only the at least one wireless communication device is authorized to transmit via the wireless communication medium during a time period;
process the signal to determine whether the SMSTA is included within the at least one wireless communication device identified in the signal;
operate the SMSTA in a power savings state when the SMSTA is determined not to be identified in the signal;
operate the SMSTA, when the SMSTA is determined to be identified in the signal, in the power savings state outside of the time period specified in the signal and monitor for communication activity of the wireless communication medium during the time period specified in the signal including to:
perform a backoff snooze countdown based on a first codeword value when communication activity is detected on the wireless communication medium, and after expiration of the backoff snooze countdown, monitor for the communication activity of the wireless communication medium; and
transmit another signal to the wireless communication device when no communication activity is detected on the wireless communication medium and then operate the SMSTA into the power savings state; and
operate the SMSTA in the power savings state and perform at least one additional backoff snooze countdown based on a second codeword value.
2. The SMSTA of claim 1 , wherein at least one of the communication interface or the processor is further configured to:
awaken the SMSTA from the power savings state and attempt to transmit at least one other signal to the wireless communication device; and
when the attempt transmit at least one other signal to the wireless communication device fails, operate the SMSTA in the power savings state and perform at least one additional backoff snooze countdown.
3. The SMSTA of claim 1 further comprising:
a battery powered device configured to operate in the power savings state for at least one order of magnitude relatively longer time duration than in a full power state.
4. The SMSTA of claim 1 , wherein the time period during which only the at least one wireless communication device is authorized to transmit via the wireless communication medium is specified based on a restricted access window (RAW) indicated within the signal.
5. The SMSTA of claim 1 , wherein at least one of the communication interface or the processor is further configured to:
receive a beacon from an access point (AP), wherein the beacon includes the first codeword value.
6. The SMSTA of claim 1 , wherein at least one of the communication interface or the processor is further configured to:
receive a beacon from an access point (AP), wherein the beacon includes the second codeword value.
7. The SMSTA of claim 1 , wherein at least one of the communication interface or the processor is further configured to:
receive a first beacon from an access point (AP), wherein the first beacon includes the first codeword value; and
receive a second beacon from the (AP), wherein the second beacon includes the second codeword value.
8. The SMSTA of claim 1 , wherein the wireless communication device is an access point (AP) or a wireless station (STA).
9. A method for execution by a smart meter station (SMSTA), the method comprising:
receiving, via a communication interface of the SMSTA and from a wireless communication medium, a signal that identifies at least one wireless communication device and specifies a time period during which only the at least one wireless communication device is authorized to transmit via the wireless communication medium during a time period;
processing the signal to determine whether the SMSTA is included within the at least one wireless communication device identified in the signal;
when the SMSTA is determined not to be identified in the signal, operating the SMSTA in a power savings state;
when the SMSTA is determined to be identified in the signal, operating the SMSTA in the power savings state outside of the time period specified in the signal and monitoring for communication activity of the wireless communication medium during the time period specified in the signal including:
performing a backoff snooze countdown based on a first codeword value when communication activity is detected on the wireless communication medium, and after expiration of the backoff snooze countdown, monitoring for the communication activity of the wireless communication medium; and
transmitting another signal to the wireless communication device when no communication activity is detected on the wireless communication medium and then operate the SMSTA into the power savings state; and
operating the SMSTA in the power savings state and performing at least one additional backoff snooze countdown based on a second codeword value.
10. The method of claim 9 further comprising:
awakening the SMSTA from the power savings state and attempting to transmit at least one other signal to the wireless communication device; and
when the attempting to transmit at least one other signal to the wireless communication device fails, operating the SMSTA in the power savings state and performing at least one additional backoff snooze countdown.
11. The method of claim 9 further comprising:
operating the SMSTA in the power savings state for at least one order of magnitude relatively longer time duration than in a full power state.
12. The method of claim 9 , wherein the time period during which only the at least one wireless communication device is authorized to transmit via the wireless communication medium is specified based on a restricted access window (RAW) indicated within the signal.
13. The method of claim 9 further comprising:
receiving a beacon from an access point (AP), wherein the beacon includes the first codeword value or the second codeword value.
14. The method of claim 9 further comprising:
receiving a first beacon from an access point (AP), wherein the first beacon includes the first codeword value; and
receiving a second beacon from the (AP), wherein the second beacon includes the second codeword value.
15. The method of claim 9 , wherein the wireless communication device is an access point (AP) or a wireless station (STA).
16. A smart meter station (SMSTA) comprising:
a communication interface; and
a processor, at least one of the communication interface or the processor configured to:
receive, from a wireless communication device via a wireless communication medium, a first signal that identifies at least one wireless communication device and specifies a time period during which only the at least one wireless communication device is authorized to transmit via the wireless communication medium during a time period;
process the first signal to determine whether the SMSTA is included within the at least one wireless communication device identified in the first signal;
operate the SMSTA in a power savings state when the SMSTA is determined not to be identified in the first signal;
operate the SMSTA, when the SMSTA is determined to be identified in the first signal, in the power savings state outside of the time period specified in the signal and monitor for communication activity of the wireless communication medium during the time period specified in the first signal including to:
perform a backoff snooze countdown based on a first codeword value when communication activity is detected on the wireless communication medium, and after expiration of the backoff snooze countdown, monitor for the communication activity of the wireless communication medium; and
transmit a second signal to the wireless communication device when no communication activity is detected on the wireless communication medium and then operate the SMSTA into the power savings state; and
operate the SMSTA, when the SMSTA is determined to be identified in the first signal, in a full power state inside of the time period specified in the signal and perform at least one of a sensing operation or a measurement operation to generate at least one of sensing data or measurement data for transmission to the wireless communication device; and
operate the SMSTA in the power savings state and perform at least one additional backoff snooze countdown based on a second codeword value.
17. The SMSTA of claim 16 , wherein at least one of the communication interface or the processor is further configured to:
operate the SMSTA, when the SMSTA is determined to be identified in the signal, in the full power state inside a first portion of the time period specified in the signal to perform the at least one of the sensing operation or the measurement operation and in the full power state inside a second portion of the time period specified in the signal to transmit the at least one of sensing data or measurement data to the wireless communication device.
18. The SMSTA of claim 16 further comprising:
a battery powered device configured to operate in the power savings state for at least one order of magnitude relatively longer time duration than in the full power state.
19. The SMSTA of claim 16 , wherein at least one of the communication interface or the processor is further configured to:
receive a beacon from an access point, wherein the beacon includes the first codeword value or the second codeword value.
20. The SMSTA of claim 16 , wherein the wireless communication device is an access point (AP) or a wireless station (STA).