Methods and apparatus for generation of physical layer protocol data units

A first communication device, comprising:

• a wireless network interface device configured to process packets that conform to a first physical layer (PHY) protocol for wireless vehicular communications and packets that conform to a second PHY protocol for the wireless vehicular communications, wherein the first PHY protocol is different from the second PHY protocol, and wherein the wireless network interface device includes one or more integrated circuit (IC) devices configured to:
• receive a first packet from a second communication device, the first packet conforming to the second PHY protocol and being configured to prompt the first communication device to transmit a second packet responsive to the first packet,
• in response to determining that one or more third communication devices neighboring the first communication device are not capable of processing packets that conform to the second PHY protocol, generating the second packet to conform to the first PHY protocol, and
• in response to receiving the first packet, and when the second packet is generated to conform to the first PHY protocol, control the wireless network interface device to transmit the second packet that conforms to the first PHY protocol.