Wireless communication system, access point, controller, network management device, and method of setting network identifier of access point

The wireless communication system according to claim 1, wherein the access point sets a first network identifier when the communication between the main server and the access point is normal, and sets a second network identifier when a communication failure occurs between the main server and the access point and the communication between the survival server and the access point is normal, and

• wherein the wireless terminal communicates information with the main server when the wireless terminal performs wireless communication with the access point using the first network identifier, and communicates information with the survival server when the wireless terminal performs wireless communication with the access point using the second network identifier.

The wireless communication system according to claim 1, wherein the access point detects a load state of at least one of the main server and the survival server, and sets the network identifier of the access point according to the load state and the communication state.

The wireless communication system according to claim 1, wherein the access point changes a scanning method, by which the wireless terminal acquires the access point, according to the communication state between the main server and the access point and between the survival server and the access point.

The wireless communication system according to claim 1, wherein the access point sets a plurality of network identifiers of the access point according to the communication state between the main server and the access point and between the survival server and the access point, and transmits a control signal, by which the wireless terminal acquires the access point, for each of the plurality of set network identifiers.

The wireless communication system according to claim 1, wherein the access point sets or changes security in the wireless communication between the wireless terminal and the access point according to the network identifier set for the access point.

An access point, which connects to and perform wireless communication with a wireless terminal, and communicates through a network with a first device performing a process associated with line connection of the wireless terminal and a second device performing the process associated with the line connection of the wireless terminal in place of the first device,

• wherein the access point detects a communication state between the first device and the access point and between the second device and the access point, sets a network identifier of the access point according to the communication state, performs wireless communication with the wireless terminal using the network identifier, and allows the wireless terminal to communicate information with the first device or the second device according to the network identifier.

A controller, which connects to an access point that connects to and performs wireless communication with a wireless terminal, and which is connected through a network with to a first device performing a process associated with line connection of the wireless terminal and a second device performing the process associated with the line connection of the wireless terminal in place of the first device,

• wherein the controller detects a communication state between the first device and the controller and between the second device and the controller, sets a network identifier of the access point according to the communication state, allows the access point to have wireless communication with the wireless terminal using the network identifier, and allows the wireless terminal to communicate information with the first device or the second device according to the network identifier.

A network management device, which is connected through a network to an access point that connects to and perform wireless communication with a wireless terminal, and which is connected through the network to a first device performing a process associated with line connection of the wireless terminal and a second device performing the process associated with the line connection of the wireless terminal in place of the first device,

• wherein the network management device detects a communication state between the first device and the network management device and between the second device and the network management device, sets a network identifier of the access point according to the communication state, allows the access point to have wireless communication with the wireless terminal using the network identifier, and allows the wireless terminal to communicate information with the first device or the second device according to the network identifier.