Emergency call based on vehicle-to-vehicle communication

A first communications device, wherein the first communications device is disposed in a first vehicle, and the first communications device comprises:

• a first vehicle-to-vehicle communications unit, wherein the first vehicle-to-vehicle communications unit receives an emergency call message from a second vehicle other than the first vehicle, and the emergency call message comprises an accident level;
• and
• a first information processing unit, wherein the first information processing unit is coupled to the first vehicle-to-vehicle communications unit, and the first information processing unit receives the emergency call message from the first vehicle-to-vehicle communications unit, performs a rescue action in response to the emergency call message, generates a rescue response message in response to the emergency call message, and sends the rescue response message to the second vehicle through the first vehicle-to-vehicle communications unit, wherein
• the first information processing unit performs the rescue action based on the accident level.

An emergency call method for a first communications device, wherein the first communications device is disposed on a first vehicle, and the method comprises the following steps:

• obtaining first status information of the first vehicle;
• determining, based on the first status information, whether a vehicle accident has occurred;
• and generating a first emergency call message when determining that the vehicle accident has occurred, wherein the first emergency call message comprises a first accident level;
• sending the first emergency call message in a first range around the first vehicle;
• after sending the first emergency call message, obtaining second status information of the first vehicle;
• and
• when a rescue response message in response to the first emergency call message is received within a first duration, generating, based on the second status information and the rescue response message, a second emergency call message comprising a second accident level, and sending the second emergency call message in a second range around the first vehicle.