NR V2X—methods for congestion control

Patent metadata

Field	Value
Publication number	US-12250574-B2
Application number	US-201917265865-A
Country	US
Kind code	B2
Filing date	Aug 7, 2019
Priority date	Aug 7, 2018
Publication date	Mar 11, 2025
Grant date	Mar 11, 2025

Abstract

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.

First claim

What is claimed is:

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).

Assignees

• Interdigital Patent Holdings Inc

Inventors

• Hoang Tuong Duc
• Deng Tao
• Freda Martino M
• El Hamss Aata
• Pelletier Benoit
• Ye Chunxuan

Classifications

• H04W4/40

  for vehicles, e.g. vehicle-to-pedestrians [V2P] · CPC title

• H04W28/0289

  Congestion control (load shedding arrangements in network planning H04W16/08; performing reselection for handling the traffic H04W36/22; wireless traffic scheduling H04W72/12) · CPC title

• H04W72/542 Primary

  using measured or perceived quality · CPC title

• H04W72/04

  Wireless resource allocation · CPC title

• H04W52/36

  with a discrete range or set of values, e.g. step size, ramping or offsets · CPC title