Listen before talk (LBT) in wireless communications
View Patent ↗A wireless communication device (alternatively, device, WDEV, etc.) includes at least one processing circuitry configured to support communications with other WDEV(s) and to generate and process signals for such communications. In some examples, the device includes a communication interface and a processing circuitry, among other possible circuitries, components, elements, etc. to support communications with other WDEV(s) and to generate and process signals for such communications. A WDEV monitors for ongoing transmission(s) on a wireless communication medium before transmitting a signal to another WDEV via the wireless communication medium. The WDEV uses different threshold levels (and/or variable threshold level functions) based on whether a detected ongoing transmission is associated with a first or second wireless communication network to determine when to make a concurrent transmission. For example, different WDEVs are associated with different wireless communication networks, and the WDEV uses different considerations to determine when to make transmissions in different situations.
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:
monitor for an ongoing transmission on a wireless communication medium before transmitting a signal to another wireless communication device via the wireless communication medium;
when the ongoing transmission is detected on the wireless communication medium, process the ongoing transmission to determine whether the ongoing transmission is based on a first wireless communication network that includes the wireless communication device or based on a second wireless communication network that excludes the wireless communication device;
when the ongoing transmission is based on the first wireless communication network, transmit the signal to the another wireless communication device via the wireless communication medium to be processed by the another wireless communication device when power of the ongoing transmission compares favorably to a first threshold level associated with the first wireless communication network; and
when the ongoing transmission is based on the second wireless communication network, transmit the signal to the another wireless communication device via the wireless communication medium to be processed by the another wireless communication device when the power of the ongoing transmission compares favorably to a second threshold level associated with the second wireless communication network.
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:
when the ongoing transmission is based on the first wireless communication network, re-monitor for at least one of the ongoing transmission or another ongoing transmission on the wireless communication medium when the power of the ongoing transmission compares unfavorably to the first threshold level associated with the first wireless communication network; and
when the ongoing transmission is based on the second wireless communication network, re-monitor for the at least one of the ongoing transmission or the another ongoing transmission on the wireless communication medium when the power of the ongoing transmission compares unfavorably to the second threshold level associated with the second wireless communication network.
3. The wireless communication device of claim 1 , wherein the at least one of the communication interface or the processing circuitry is further configured to:
process the ongoing transmission in accordance with a first clear channel assessment (CCA) procedure that employs the first threshold level when the ongoing transmission is based on the first wireless communication network; and
process the ongoing transmission in accordance with a second CCA procedure that employs the second threshold level when the ongoing transmission is based on the second wireless communication network.
4. 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, from a controller wireless communication device of at least one of the first wireless communication network or the second wireless communication network, information that specifies:
a first set of basic services sets (BSSs) supported by a first plurality of other wireless communication devices that correspond to the first wireless communication network that includes the wireless communication device; and
a second set of BSSs supported by a second plurality of other wireless communication devices that correspond to the second wireless communication network that excludes the wireless communication device;
process the ongoing transmission to determine at least one of a source wireless communication device or a destination wireless communication device of the ongoing transmission;
determine that the ongoing transmission is based on the first wireless communication network that includes the wireless communication device when the at least one of the source wireless communication device or the destination wireless communication device is included in the first set of BSSs; and
determine that the ongoing transmission is based on the second wireless communication network that excludes the wireless communication device when the at least one of the source wireless communication device or the destination wireless communication device is included in the second set of BSSs.
5. The wireless communication device of claim 1 , wherein the at least one of the communication interface or the processing circuitry is further configured to:
when the ongoing transmission is based on the first wireless communication network, select the first threshold level associated with the first wireless communication network based on a first variable threshold level function that is based on a first transmit power to be used by the wireless communication device to transmit the signal; and
when the ongoing transmission is based on the second wireless communication network, select the second threshold level associated with the second wireless communication network based on a second variable threshold level function that is based on a second transmit power to be used by the wireless communication device to transmit the signal.
6. The wireless communication device of claim 1 , wherein:
the first wireless communication network that includes the wireless communication device includes a first set of jointly managed basic services sets (BSSs) supported by a first plurality of access points (APs) that service a first at least one wireless station (STA);
the second wireless communication network that excludes the wireless communication device includes a second set of jointly managed BSSs supported by a second plurality of APs that service a second at least one STA; and
the first wireless communication network and the second wireless communication network include at least some overlapping coverage.
7. The wireless communication device of claim 1 further comprising:
the communication interface configured to support communications within at least one of a satellite communication system, a wireless communication system, a wired communication system, a fiber-optic communication system, or a mobile communication system; and
the processing circuitry configured to:
detect the ongoing transmission based on at least one signal received via the communication interface; and
transmit the signal to the another wireless communication device via the communication interface and via the wireless communication medium.
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) that supports a basic services set (BSS) within the first wireless communication network that includes the wireless communication device.
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:
monitor for an ongoing transmission on a wireless communication medium before transmitting a signal to another wireless communication device via the wireless communication medium;
when the ongoing transmission is detected on the wireless communication medium, process the ongoing transmission to determine whether the ongoing transmission is based on a first wireless communication network that includes the wireless communication device or based on a second wireless communication network that excludes the wireless communication device;
when the ongoing transmission is based on the first wireless communication network:
select a first threshold level associated with the first wireless communication network based on a first variable threshold level function that varies between a first maximum threshold level and a first minimum threshold level and that is based on a first transmit power to be used by the wireless communication device to transmit the signal; and
transmit the signal to the another wireless communication device via the wireless communication medium to be processed by the another wireless communication device when power of the ongoing transmission compares favorably to the first threshold level associated with the first wireless communication network; and
when the ongoing transmission is based on the second wireless communication network:
select a second threshold level associated with the second wireless communication network based on a second variable threshold level function that varies between a second maximum threshold level and a second minimum threshold level and that is based on a second transmit power to be used by the wireless communication device to transmit the signal; and
transmit the signal to the another wireless communication device via the wireless communication medium to be processed by the another wireless communication device when the power of the ongoing transmission compares favorably to the second threshold level associated with the second wireless communication network.
10. The wireless communication device of claim 9 , wherein the at least one of the communication interface or the processing circuitry is further configured to:
when the ongoing transmission is based on the first wireless communication network, re-monitor for at least one of the ongoing transmission or another ongoing transmission on the wireless communication medium when the power of the ongoing transmission compares unfavorably to the first threshold level associated with the first wireless communication network; and
when the ongoing transmission is based on the second wireless communication network, re-monitor for the at least one of the ongoing transmission or the another ongoing transmission on the wireless communication medium when the power of the ongoing transmission compares unfavorably to the second threshold level associated with the second wireless communication network.
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:
process the ongoing transmission in accordance with a first clear channel assessment (CCA) procedure that employs the first threshold level when the ongoing transmission is based on the first wireless communication network; and
process the ongoing transmission in accordance with a second CCA procedure that employs the second threshold level when the ongoing transmission is based on the second wireless communication network.
12. 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, from a controller wireless communication device of at least one of the first wireless communication network or the second wireless communication network, information that specifies:
a first set of basic services sets (BSSs) supported by a first plurality of other wireless communication devices that correspond to the first wireless communication network that includes the wireless communication device; and
a second set of BSSs supported by a second plurality of other wireless communication devices that correspond to the second wireless communication network that excludes the wireless communication device;
process the ongoing transmission to determine at least one of a source wireless communication device or a destination wireless communication device of the ongoing transmission;
determine that the ongoing transmission is based on the first wireless communication network that includes the wireless communication device when the at least one of the source wireless communication device or the destination wireless communication device is included in the first set of BSSs; and
determine that the ongoing transmission is based on the second wireless communication network that excludes the wireless communication device when the at least one of the source wireless communication device or the destination wireless communication device is included in the second set of BSSs.
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) that supports a basic services set (BSS) within the first wireless communication network that includes the wireless communication device.
14. A method for execution by a wireless communication device, the method comprising:
monitoring for an ongoing transmission on a wireless communication medium before transmitting a signal to another wireless communication device via the wireless communication medium;
when the ongoing transmission is detected on the wireless communication medium, processing the ongoing transmission to determine whether the ongoing transmission is based on a first wireless communication network that includes the wireless communication device or based on a second wireless communication network that excludes the wireless communication device;
when the ongoing transmission is based on the first wireless communication network, transmitting, via a communication interface of the wireless communication device, the signal to the another wireless communication device via the wireless communication medium to be processed by the another wireless communication device when power of the ongoing transmission compares favorably to a first threshold level associated with the first wireless communication network; and
when the ongoing transmission is based on the second wireless communication network, transmitting, via the communication interface of the wireless communication device, the signal to the another wireless communication device via the wireless communication medium to be processed by the another wireless communication device when the power of the ongoing transmission compares favorably to a second threshold level associated with the second wireless communication network.
15. The method of claim 14 further comprising:
when the ongoing transmission is based on the first wireless communication network, re-monitoring for at least one of the ongoing transmission or another ongoing transmission on the wireless communication medium when the power of the ongoing transmission compares unfavorably to the first threshold level associated with the first wireless communication network; and
when the ongoing transmission is based on the second wireless communication network, re-monitoring for the at least one of the ongoing transmission or the another ongoing transmission on the wireless communication medium when the power of the ongoing transmission compares unfavorably to the second threshold level associated with the second wireless communication network.
16. The method of claim 14 further comprising:
processing the ongoing transmission in accordance with a first clear channel assessment (CCA) procedure that employs the first threshold level when the ongoing transmission is based on the first wireless communication network; and
processing the ongoing transmission in accordance with a second CCA procedure that employs the second threshold level when the ongoing transmission is based on the second wireless communication network.
17. The method of claim 14 further comprising:
receiving, via the communication interface and from a controller wireless communication device of at least one of the first wireless communication network or the second wireless communication network, information that specifies:
a first set of basic services sets (BSSs) supported by a first plurality of other wireless communication devices that correspond to the first wireless communication network that includes the wireless communication device; and
a second set of BSSs supported by a second plurality of other wireless communication devices that correspond to the second wireless communication network that excludes the wireless communication device;
processing the ongoing transmission to determine at least one of a source wireless communication device or a destination wireless communication device of the ongoing transmission;
determining that the ongoing transmission is based on the first wireless communication network that includes the wireless communication device when the at least one of the source wireless communication device or the destination wireless communication device is included in the first set of BSSs; and
determining that the ongoing transmission is based on the second wireless communication network that excludes the wireless communication device when the at least one of the source wireless communication device or the destination wireless communication device is included in the second set of BSSs.
18. The method of claim 14 , wherein:
when the ongoing transmission is based on the first wireless communication network, selecting the first threshold level associated with the first wireless communication network based on a first variable threshold level function that is based on a first transmit power to be used by the wireless communication device to transmit the signal; and
when the ongoing transmission is based on the second wireless communication network, selecting the second threshold level associated with the second wireless communication network based on a second variable threshold level function that is based on a second transmit power to be used by the wireless communication device to transmit the signal.
19. The method of claim 14 , wherein:
the first wireless communication network that includes the wireless communication device includes a first set of jointly managed basic services sets (BSSs) supported by a first plurality of access points (APs) that service a first at least one wireless station (STA);
the second wireless communication network that excludes the wireless communication device includes a second set of jointly managed BSSs supported by a second plurality of APs that service a second at least one STA; and
the first wireless communication network and the second wireless communication network include at least some overlapping coverage.
20. 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) that supports a basic services set (BSS) within the first wireless communication network that includes the wireless communication device.