METHODS AND DEVICES FOR LOWERING POWER REQUIREMENTS IN BATTERY-OPERATED MOBILE ELECTRONIC DEVICES USED IN V2X COMMUNICATIONS

Devices and method of use for reducing power requirements in battery-operated vehicle-to-everything (V2X) communications. Such devices include a receiver and a transmitter. When installed in a warning vehicle, the receiver may be configured to receive a message from a vulnerable road user (VRU) at risk, and the transmitter may be configured to transmit, after receiving the message from the VRU at risk, only during a short interframe space (SIFS) period in dedicated short-range communications (DSRC), or only during a predetermined period in cellular V2X (C-V2X) communications. When included in a mobile electronic device of a VRU, the receiver may be configured to detect only a message received from a warning vehicle during a SIFS period after transmission by the VRU device in DSRC, or only a message received from the warning vehicle in a defined time period after transmission by the VRU device in C-V2X communications, the receiver being further configured to be turned off until a next transmission by the VRU device.