Bootstrap method of electric vehicle charging station
Provided is a bootstrap method for registering a charging station (CS), which was in an offline state, to an electric vehicle charging station management system (CSMS) and operating same. The bootstrap method comprises the steps of: storing at least partial bootstrap information in a CS so as to configure bootstrap information; connecting the CS to a CSMS by setting a security channel between the CS and the CSMS for maintaining registration information about the CS; and registering the CS to the CSMS.
1 . A bootstrapping method for registering a charging station in an offline state with an electric vehicle charging station management system (CSMS) to enable the charging station to operate normally, comprising:
configuring, by the charging station, bootstrap information by storing at least some of the bootstrap information in the charging station;
establishing, by the charging station, a secure channel between the charging station and the CSMS to connect the charging station to the CSMS based on the bootstrap information stored in the charging station, wherein the CSMS is previously in the offline state with the charging station before the secure channel is established; and
communicating, by the charging station with the CSMS, for the charging station to be registered with the CSMS.
2 . The bootstrapping method of claim 1 , wherein the bootstrap information comprises:
connection information to the CSMS associated with the charging station;
credential information for establishing the secure channel to the CSMS; and
registration information of the charging station.
3 . The bootstrapping method of claim 2 , wherein the connection information includes at least one of an IP address and port number of the CSMS, or connection information needed to communicate with the CSMS according to a predetermined communication protocol.
4 . The bootstrapping method of claim 3 , wherein the predetermined communication protocol is an Extensible Messaging and Presence Protocol (XMPP),
wherein the connection information needed to communicate with the CSMS includes an XMPP application identifier or subscription topics.
5 . The bootstrapping method of claim 3 , wherein the credential information includes at least one of:
a symmetric key shared in advance by the charging station and the CSMS or identification information that may be used to check a physical or logical identity of the charging station; or
a public key certificate chain including a public key issued to the charging station.
6 . The bootstrapping method of claim 1 , wherein configuring the bootstrap information is performed in at least one of three modes:
a factory configuration mode in which the bootstrap information is stored in the charging station in a predetermined factory;
an on-site configuration mode in which the bootstrap information is stored in the charging station in an installation site by using a storage medium; or
a remote configuration mode in which the bootstrap information is stored in the charging station through a predetermined communication network from a bootstrapping server located in a remote site.
7 . The bootstrapping method of claim 6 , wherein configuring the bootstrap information in the remote configuration mode comprises:
installing predetermined bootstrap trigger information in the charging station according to any of the factory configuration mode, the on-site configuration mode, and a combination thereof; and
downloading the bootstrap information from the bootstrapping server based on the bootstrap trigger information installed in the charging station.
8 . The bootstrapping method of claim 6 , wherein downloading the bootstrap information comprises:
establishing a secure channel between the charging station and the bootstrapping server in a same manner as establishing the secure channel between the charging station and the CSMS to register the registration information of the charging station.
9 . The bootstrapping method of claim 1 , wherein establishing the secure channel between the charging station and the CSMS and connecting the charging station to the CSMS comprises:
establishing the secure channel by using a transport layer security-pre-shared key (TLS-PSK) cypher suite when a credential available to the charging station is a pre-shared symmetric key (PSK) shared with the CSMS, and establishing the secure channel by using a transport layer security method with mutual authentication or a certificate-based connection method when the credential available to the charging station is a predetermined certificate chain.
10 . The bootstrapping method of claim 1 , wherein registering the charging station with the CSMS comprises:
transmitting the registration information including identity information of the charging station, identity information of an EVSE included in or connected to the charging station, and capability information of the charging station to the CSMS.
11 . A charging station apparatus capable of being registered with a charging station management system (CSMS) through a predetermined bootstrapping procedure in an offline state to be operable to charge an electric vehicle, comprising:
a processor executing at least one program instruction,
wherein the processor is configured to:
configure bootstrap information by storing at least some of the bootstrap information in the charging station apparatus;
establish a secure channel between the CSMS and the charging station apparatus to connect the charging station apparatus to the CSMS based on the boot strap information stored in the charging station apparatus, wherein the CSMS is previously in the offline state with the charging apparatus before the secure channel is established; and
communicate with the CSMS for the charging station apparatus to be registered with the CSMS.
12 . The charging station apparatus of claim 11 , wherein the bootstrap information comprises:
connection information to the CSMS associated with the charging station apparatus;
credential information for establishing the secure channel to the CSMS; and
registration information of the charging station apparatus.
13 . The charging station apparatus of claim 12 , wherein the connection information includes at least one of an IP address and port number of the CSMS, or connection information needed to communicate with the CSMS according to a predetermined communication protocol.
14 . The charging station apparatus of claim 13 , wherein the predetermined communication protocol is an Extensible Messaging and Presence Protocol (XMPP),
wherein the connection information needed to communicate with the CSMS includes an XMPP application identifier or subscription topics.
15 . The charging station apparatus of claim 13 , wherein the credential information includes at least one of:
a symmetric key shared in advance by the charging station apparatus and the CSMS or identification information that may be used to check a physical or logical identity of the charging station apparatus; or
a public key certificate chain including a public key issued to the charging station apparatus.
16 . The charging station apparatus of claim 11 , wherein the program instructions causing the processor to configure the bootstrap comprises instructions causing the processor to perform at least one of three modes:
a factory configuration mode in which the bootstrap information is stored in the charging station apparatus in a predetermined factory;
an on-site configuration mode in which the bootstrap information is stored in the charging station apparatus in an installation site by using a storage medium; or
a remote configuration mode in which the bootstrap information is stored in the charging station apparatus through a predetermined communication network from a bootstrapping server located in a remote site.
17 . The charging station apparatus of claim 16 , wherein the program instructions causing the processor to configure the bootstrap information in the remote configuration mode comprises instructions causing the processor to:
install predetermined bootstrap trigger information in the charging station according to any of the factory configuration mode, the on-site configuration mode, and a combination thereof; and
download the bootstrap information from the bootstrapping server based on the bootstrap trigger information.
18 . The charging station apparatus of claim 17 , wherein the program instructions causing the processor to download the bootstrap information comprises instructions causing the processor to:
establish a secure channel to the bootstrapping server in a same manner as establishing the secure channel to the CSMS to register the registration information.
19 . The charging station apparatus of claim 11 , wherein the program instructions causing the processor to establish the secure channel to the CSMS and connect the charging station apparatus to the CSMS comprises instructions causing the processor to:
establish the secure channel by using a transport layer security-pre-shared key (TLS-PSK) cypher suite when an available credential is a pre-shared symmetric key (PSK) shared with the CSMS, and establish the secure channel by using a transport layer security method with mutual authentication or a certificate-based connection method when the available credential is a predetermined certificate chain.
20 . The charging station apparatus of claim 11 , wherein the program instructions causing the processor to register the charging station apparatus with the CSMS comprises instructions causing the processor to:
send the registration information including identity information of the charging station apparatus, identity information of an EVSE included in or connected to the charging station apparatus, and capability information of the charging station apparatus to the CSMS.