various exemplary embodiments relate to a wireless communications system related method and vehicle including : a first communications device configured for attachment to a vehicle including : a first antenna group , a first receiver configured to receive a first instance of a message via the first antenna group , a first transmitter configured to transmit a second instance of the message via the first antenna group , and a first controller configured to cause transmission of the second instance via the first transmitter in response to the first receiver receiving the first instance ; and a second communications device configured for attachment to the vehicle including : a second antenna group , a second receiver configured to receive data via the second antenna group , wherein the second receiver receives both the first instance and the second instance , and message combination circuitry configured to generate combined message by combining the first instance and the second instance .