Determining periodicity of sidelink communications within the network coverage

Patent metadata

Field	Value
Publication number	US-12484075-B2
Application number	US-202218273628-A
Country	US
Kind code	B2
Filing date	Feb 18, 2022
Priority date	Feb 19, 2021
Publication date	Nov 25, 2025
Grant date	Nov 25, 2025

Abstract

A method for a first UE to perform sidelink communication with a second UE is provided. The method receives a first resource set from a cell to establish a first sidelink channel with the second UE, the first resource set indicating at least a first distance between the first and second UEs. The method establishes the first sidelink channel with the second UE based on the first resource set and transmits a set of parameters associated with the first sidelink channel to the cell. The method also sets a first timer based on at least the first distance, the first timer for determining when to establish a second sidelink channel with the second UE. When the first timer is expired and no second resource set is received from the cell, the method establishes the second sidelink channel with the second UE based on the first resource set.

First claim

What is claimed is:

1 . A first user equipment (UE) for sidelink communication with a second UE, the first UE comprising:
one or more non-transitory computer-readable media having computer-executable instructions embodied thereon; and at least one processor coupled to the one or more non-transitory computer-readable media, and configured to execute the computer-executable instructions to: receive, at the first UE, a first resource set from a cell to establish a first sidelink channel with the second UE, the first resource set indicating at least a first distance between the first UE and the second UE; establish the first sidelink channel with the second UE based on the first resource set; transmit a set of parameters associated with the established first sidelink channel to the cell; set a first timer based on at least the first distance indicated in the first resource set, the first timer for determining when to establish a second sidelink channel with the second UE; and when the first timer is expired and no second resource set is received from the cell, establish the second sidelink channel with the second UE based on the first resource set.

2 . The first UE of claim 1 , wherein the at least one processor is further configured to execute the computer-executable instructions to:
before the first timer is expired, receive the second resource set from the cell; determine whether the second resource set indicates at least a second distance between the first and second UEs; and when the second resource set indicates the second distance: set a second timer based on at least the second distance indicated in the second resource set; determine that the second timer is shorter than the first timer; and when the second timer is expired, and before the first timer is expired, establish the second sidelink channel with the second UE based on the second resource set.

3 . The first UE of claim 2 , wherein the at least one processor is further configured to execute the computer-executable instructions to, when the second resource set does not indicate the second distance:
determine whether the second resource set comprises at least a parameter that indicates an overriding timer for establishing the second sidelink channel with the second UE; and when the second resource set includes the parameter, establish the second sidelink channel with the second UE based on the second resource set after the overriding timer is expired irrespective of the overriding timer is shorter or longer than the first timer.

4 . The first UE of claim 3 , wherein the at least one processor is further configured to execute the computer-executable instructions to, when the second resource set does not include the parameter:
establish the second sidelink channel with the second UE based on the second resource set after the first timer is expired.

5 . The first UE of claim 2 , wherein the first resource set further indicates a first direction to the second UE and the second resource set further indicates a second direction to the second UE.

6 . The first UE of claim 5 , wherein the second distance is shorter than the first distance while the second direction is the same or different than the first direction.

7 . The first UE of claim 1 , wherein receiving the first resource set from the cell comprises receiving the first resource set from a new radio (NR) vehicle to everything (V2X) control function associated with the cell.

8 . The first UE of claim 1 , wherein:
setting the first timer based on at least the first distance comprises calculating a time interval between each two sequential establishments of sidelink channels; and the time interval is calculated based on one or more parameters.

9 . The first UE of claim 8 , wherein the one or more parameters comprises at least one of an initial time interval, an interval factor, an initial distance, a distance factor, and a maximum number of iterations in calculating the time interval.

10 . The first UE of claim 8 , wherein the one or more parameters are included in at least one resource set in the plurality of resource sets including the first and second resource sets.

11 . The first UE of claim 1 , wherein setting the first timer based on at least the first distance comprises:
when the first distance is more than a first threshold or the first distance is unknown, setting the timer to a default time interval; when the first distance is less than a second threshold, setting the timer to a minimum time interval which is calculated based on the default time interval; and when the first distance is between the first and second thresholds, setting the timer to a value that is calculated based on at least one of the default time interval, an interval factor, a default distance, and a distance factor.

12 . The first UE of claim 1 , wherein the first resource set comprises an identifier (ID) of the first resource set, parameters for configuring a first sidelink resource pool, and beam management (BM) parameters associated with the first sidelink resource pool for enabling a first set of directional transmission beams.

13 . The first UE of claim 12 , wherein the first sidelink resource pool comprises a V2X resource pool.

14 . The first UE of claim 1 , wherein the at least one processor is further configured to execute the computer-executable instructions to:
before receiving the first resource set from the cell, send a message to the cell requesting the first resource set via dedicated signaling.

15 . The first UE of claim 1 , wherein the at least one processor is further configured to execute the computer-executable instructions to:
before receiving the first resource set from the cell to establish the first sidelink channel with the second UE, receive, from the cell, an initial sidelink configuration to establish an initial sidelink channel with the second UE, the initial configuration indicating at least a default timer; establish the initial sidelink channel with the second UE based on the initial sidelink configuration; transmit an initial set of parameters associated with the established initial sidelink channel to the cell, wherein the cell determines the first distance based on the received initial set of parameters; and set an initial timer based on at least the default timer indicated in the initial sidelink configuration, the initial timer for determining when to establish the first sidelink channel with the second UE.

Assignees

• Sharp Kk

Inventors

• Park Kenneth James
• Yokomakura Kazunari
• Yin Zhanping
• Kowalski John Michael

Classifications

• H04W76/10

  Connection setup · CPC title

• H04W76/28

  Discontinuous transmission [DTX]; Discontinuous reception [DRX] · CPC title

• H04W4/023

  using mutual or relative location information between multiple location based services [LBS] targets or of distance thresholds · CPC title

• H04W4/40

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

• H04W92/18

  between terminal devices · CPC title