Method and apparatus for transmitting a warning message by using V2X services in a wireless access system

摘要

The present invention provides methods and apparatus for transmitting and receiving warning messages by using Vehicle to Everything (V2X) services. One of embodiments of the present invention is performed by a vehicle user equipment (VUE) and comprising steps of receiving a first Message transmission Guideline Package (MGP) message including geographical coordination information related with an MGP area and a value tag indicating time information for updating the MGP message; checking the value tag is changed or not; and transmitting a first warning message based on the first MGP message when the value tag is not expired; or transmitting a second warning message based on a second MGP message when the value tag is expired, wherein at least a transmission frequency or a transmission power for the second warning message are determined base on the second MGP message, and wherein the MGP area represents where MGP profiles are the same.