A vehicle direct communication, VDC, resource request method, comprising: sending, by user equipment, a VDC resource request message to a base station when the user equipment needs to request a VDC resource for sending vehicle service information, wherein the VDC resource request message comprises at least one piece of the following information: a VDC resource status list, or travel information of the user equipment, and an available VDC resource is indicated in the VDC resource status list; receiving, by the user equipment, a VDC resource allocation indication message from the base station, wherein the VDC resource allocation indication message indicates a VDC resource allocated to the user equipment by the base station according to the VDC resource request message; and sending, by the user equipment, the vehicle service information by using the VDC resource indicated by the VDC resource allocation indication message; characterized in that before the sending, by the user equipment, the VDC resource request message to the base station, the method comprising: sending, by the user equipment, a predetermined access preamble sequence to the base station, so that the base station learns, according to the predetermined access preamble sequence, that the user equipment currently needs to apply for the VDC resource, and allocates an uplink grant value to the user equipment for use for requesting the VDC resource; and receiving an access acknowledgment message from the base station, wherein the access acknowledgment message comprises the uplink grant value allocated to the user equipment by the base station; wherein the sending, by the user equipment, the VDC resource request message to the base station includes: sending, by the user equipment, the VDC resource request message to the base station according to the uplink grant value in the access acknowledgment message. sending, by user equipment, a VDC resource request message to a base station when the user equipment needs to request a VDC resource for sending vehicle service information, wherein the VDC resource request message comprises at least one piece of the following information: a VDC resource status list, or travel information of the user equipment, and an available VDC resource is indicated in the VDC resource status list; receiving, by the user equipment, a VDC resource allocation indication message from the base station, wherein the VDC resource allocation indication message indicates a VDC resource allocated to the user equipment by the base station according to the VDC resource request message; and sending, by the user equipment, the vehicle service information by using the VDC resource indicated by the VDC resource allocation indication message; characterized in that before the sending, by the user equipment, the VDC resource request message to the base station, the method comprising: sending, by the user equipment, a predetermined access preamble sequence to the base station, so that the base station learns, according to the predetermined access preamble sequence, that the user equipment currently needs to apply for the VDC resource, and allocates an uplink grant value to the user equipment for use for requesting the VDC resource; and receiving an access acknowledgment message from the base station, wherein the access acknowledgment message comprises the uplink grant value allocated to the user equipment by the base station; wherein the sending, by the user equipment, the VDC resource request message to the base station includes: sending, by the user equipment, the VDC resource request message to the base station according to the uplink grant value in the access acknowledgment message. sending, by the user equipment, a predetermined access preamble sequence to the base station, so that the base station learns, according to the predetermined access preamble sequence, that the user equipment currently needs to apply for the VDC resource, and allocates an uplink grant value to the user equipment for use for requesting the VDC resource; and receiving an access acknowledgment message from the base station, wherein the access acknowledgment message comprises the uplink grant value allocated to the user equipment by the base station; wherein the sending, by the user equipment, the VDC resource request message to the base station includes: sending, by the user equipment, the VDC resource request message to the base station according to the uplink grant value in the access acknowledgment message.