NR V2X—methods for congestion control
Methods, devices, and systems for congestion control in a wireless communications system. Some embodiments including receiving a plurality of zone configurations, receiving, for each of the plurality of zone configurations, a channel busy ration (CBR) threshold and a mapping of zone identities (IDs) to resource pools; and measuring a CBR of a resource pool with which the WTRU is currently configured. If the measured CBR meets a CBR threshold of a first zone configuration of the plurality, the WTRU is configured with the first zone configuration, with a zone ID based on the first zone configuration and apposition of the WTRU, and with a resource pool base on the mapping and configured zone ID.
1. A method implemented in a wireless transmit/receive unit (WTRU), the method comprising:
receiving information indicating a channel busy ratio (CBR) threshold; and
responsive to a CBR of a resource pool with which the WTRU is currently configured meeting the CBR threshold:
switching the WTRU from a first configuration to a second configuration, wherein the first configuration corresponds to a first zone size and a first maximum transmit power, and wherein the second configuration corresponds to a second zone size and a second maximum transmit power, and
transmitting a wireless signal at the second maximum transmit power.
2. The method of claim 1 , further comprising receiving, for each of the plurality of configurations, a maximum transmit power (Pmax) value for the WTRU.
3. The method of claim 1 , wherein each of the plurality of configurations includes zone size parameters.
4. The method of claim 1 , wherein each of the plurality of configurations indicates a zone dimension.
5. The method of claim 1 , wherein each of the plurality of configurations indicates a zone length (L) and a zone width (W).
6. The method of claim 1 , wherein each of the plurality of configurations indicates a number of zone IDs.
7. The method of claim 1 , wherein each of the plurality of configurations indicates a number of zones in length (NX) and a number of zones in width (NY).
8. A wireless transmit/receive unit (WTRU) comprising:
a transceiver configured to receive information indicating a channel busy ratio (CBR) threshold; and
a processor coupled to the transceiver and configured to, responsive to a CBR of a resource pool with which the WTRU is currently configured meeting the CBR threshold:
switch the WTRU from a first configuration to a second configuration, wherein the first configuration corresponds to a first zone size and a first maximum transmit power, and wherein the second configuration corresponds to a second zone size and a second maximum transmit power, and the transceiver further configured to transmit a wireless signal at the second maximum transmit power.
9. The WTRU of claim 8 , wherein the transceiver is further configured to receive, for each of the plurality of configurations, a maximum transmit power (Pmax) value for the WTRU.
10. The WTRU of claim 8 , wherein each of the plurality of configurations includes zone size parameters.
11. The WTRU of claim 8 , wherein each of the plurality of configurations indicates a zone dimension.
12. The WTRU of claim 8 , wherein each of the plurality of configurations indicates a zone length (L) and a zone width (W).
13. The WTRU of claim 8 , wherein each of the plurality of configurations indicates a number of zone IDs.
14. The WTRU of claim 8 , wherein each of the plurality of configurations indicates a number of zones in length (NX) and a number of zones in width (NY).