Method and apparatus for detecting terminal that deviates from cluster

A base station comprising:

• at least one memory storing instructions;
• at least one transceiver;
• and
• at least one processor coupling the at least one memory and the at least one transceiver, wherein the at least one processor execute the instructions for:
• receiving a safety message from a first terminal;
• detecting cluster departure of a second terminal based on the safety message;
• and
• transmitting a warning message to at least one of a nearby terminal and a traffic control center based on the detection,
• wherein each of the first terminal and the second terminal is included in a cluster which is identical,
• wherein the safety message includes at least one of cluster information related to mobility of the cluster and user information related to mobility of the first terminal, and
• wherein the warning message includes departure information related to the second terminal.

An apparatus comprising:

• at least one processor;
• and
• at least one memory operably coupled by the at least one processor and storing instructions, wherein the at least one processor execute the instructions for:
• receiving a safety message from a first terminal;
• detecting cluster departure of a second terminal based on the safety message;
• and
• transmitting a warning message to at least one of a nearby terminal and a traffic control center based on the detection,
• wherein each of the first terminal and the second terminal is included in a cluster which is identical,
• wherein the safety message includes at least one of cluster information related to mobility of the cluster and user information related to mobility of the first terminal, and
• wherein the warning message includes departure information related to the second terminal.