Method by which terminal transmits v2x signal in wireless communication system, and terminal using method

Patent metadata

Field	Value
Publication number	US-2018359787-A1
Application number	US-201615776617-A
Country	US
Kind code	A1
Filing date	Nov 17, 2016
Priority date	Nov 17, 2015
Publication date	Dec 13, 2018
Grant date	—

Abstract

Provided are a method by which a terminal transmits a vehicle-to-everything (V2X) signal in a wireless communication system, and a terminal using the method. The method comprises: reserving a plurality of V2X transmission resources on the basis of one scheduling assignment; reselecting a V2X transmission resource if a resource collision occurs for a certain time or more among the plurality of reserved V2X transmission resources; and transmitting a V2X signal by using the reselected V2X transmission resource.

First claim

What is claimed is:

1 . A method for transmitting a vehicle-to-everything (V2X) signal of a terminal in a wireless communication system, the method comprising:
reserving multiple V2X transmission resources on the basis of a single scheduling assignment; reselecting a V2X transmission resource when a resource collision occurs for at least a specific time among the multiple reserved V2X transmission resources; and transmitting a V2X signal by using the reselected V2X transmission resource.

2 . The method of claim 1 , wherein whether the resource collision occurs is determined based on whether V2X transmission resources indicated by a scheduling assignment received from a different terminal overlap with the reserved multiple V2X transmission resources.

3 . The method of claim 1 , wherein whether the resource collision occurs is determined based on whether energy greater than or equal to a specific value is detected from the reserved multiple V2X transmission resources.

4 . The method of claim 1 , wherein the multiple V2X transmission resources are reserved in multiple subframes.

5 . The method of claim 4 , wherein a V2X transmission resource is reselected in subframes which come after the specific time among the multiple subframes.

6 . The method of claim 4 , wherein a scheduling assignment for reserving next V2X transmission resources is transmitted in at least one subframe among the multiple subframes.

7 . The method of claim 1 , further comprising:
attempting to detect a scheduling assignment transmitted by a different terminal; and transmitting the single scheduling assignment when the detection attempt fails at least a specific number of times.

8 . The method of claim 1 , wherein, upon detecting multiple resource collisions from the reserved multiple V2X transmission resources, only information regarding some resource collisions determined based on a priority is reported to a different terminal or a base station.

9 . The method of claim 8 , wherein the priority is determined based on at least one of a reception power level of a resource in which a resource collision occurs, the number of times of resource collision occurrences, a duration of the resource collision, a type of a channel or signal transmitted in the resource in which the resource collision occurs, and an assignment period of the resource in which the resource collision occurs.

10 . A terminal capable of transmitting a vehicle-to-everything (V2X) signal, the terminal comprising:
a radio frequency (RF) unit transmitting and receiving a radio signal; and a processor operatively coupled to the RF unit, wherein the processor is configured to: reserve multiple V2X transmission resources on the basis of a single scheduling assignment; reselect a V2X transmission resource when a resource collision occurs for at least a specific time among the multiple reserved V2X transmission resources; and transmit a V2X signal by using the reselected V2X transmission resource.

Assignees

• Lg Electronics Inc

Inventors

• Lee Seungmin
• Seo Hanbyul
• Kim Myoungseob

Classifications

• H04L1/1887

  Scheduling and prioritising arrangements · CPC title

• H04L1/1848

  Time-out mechanisms · CPC title

• H04W28/26

  Resource reservation · CPC title

• H04W74/02

  Hybrid access · CPC title

• H04W72/02

  Selection of wireless resources by user or terminal · CPC title