Active pairing method and device for wireless LAN-based smart charging or smart charging and discharging

A proactive pairing method for wireless local area network (LAN)-based smart charging or charging/discharging, performed by an electric vehicle (EV), the proactive pairing method comprising:

• obtaining a first electric vehicle supply equipment (EVSE) identifier (EVSEID) capable of identifying a first EVSE from the first EVSE, wherein the first EVSE is an EVSE in which a first EV is parked or with which the first EV is connected through a conductive cable;
• transmitting, by an EV communication controller (EVCC) of the first EV, a supply equipment communication controller (SECC) discovery protocol (SDP) request message including the first EVSEID in a multicast scheme through a local link to which a plurality of SECCs are connected, in order to discover an SECC controlling the first EVSE;
• and
• receiving, from an SDP server communicating with a first SECC, an SDP response message including the SDP request message or information related to the first SECC, the information related to the first SECC indicating that a specific SECC corresponding to the EVSE ID is the first SECC itself.

A proactive pairing apparatus for wireless local area network (LAN)-based smart charging or charging/discharging, comprising:

• a first electric vehicle supply equipment (EVSE) connected to a power grid and configured to supply power to a first electric vehicle (EV);
• a first supply equipment communication controller (SECC) controlling operations of the first EVSE and communicating with an EV communication controller (EVCC) of the first EV;
• and
• a SECC discovery protocol (SDP) server communicating with the first EV using an SDP,
• wherein the first EVSE obtains an EV identifier (EVID) capable of identifying the first EV from the first EV parked in or plugged into the first EVSE, and provides the obtained EVID to the first SECC;
• and the first EV transmits an SDP request message including the EVID to the SDP server, and receives, from the SDP server communicating with the first SECC, an SDP response message including the SDP request message or information indicating that an SECC corresponding to the EVID is the first SECC.