Network system, constant connection method, communication method,electronic device, constant connection server, application server, and program

A constant connection method comprising:

• opening a constant connection between a plurality of electronic devices and a constant connection server;
• associating the plurality of electronic devices with identification information;
• and
• pushing information from an application server to any of the plurality of electronic devices via the constant connection server on the basis of the identification information.

An electronic device comprising:

• a memory that stores identification information;
• a communication interface provided to constantly connect to a constant connection server;
• and
• a processor that, by using the communication interface, receives information from an application server via the constant connection server on the basis of the identification information.

A constant connection server comprising:

• a memory that stores identification information associated with a plurality of electronic devices;
• a communication interface provided to constantly connect to the plurality of electronic devices and communicate with an application server;
• and
• a processor that, by using the communication interface, pushes information from the application server to any of the plurality of electronic devices on the basis of the identification information.

An application server comprising:

• a memory that stores identification information associated with a plurality of electronic devices;
• a communication interface provided to communicate with a constant connection server;
• and
• a processor that, by using the communication interface, pushes information to any of the plurality of electronic devices via the constant connection server on the basis of the identification information.

A network system comprising:

• a plurality of electronic devices;
• and
• a constant connection server that makes a constant connection with the plurality of electronic devices,
• wherein the constant connection server stores an association between constant connection IDs for specifying the plurality of electronic devices and group IDs for specifying a plurality of groups, and pushes data to at least one of the electronic devices belonging to a group associated with a group ID being designated.

A communication method comprising:

• opening a constant connection between a plurality of electronic devices and a constant connection server;
• storing an association between constant connection IDs for specifying the plurality of electronic devices and group IDs for specifying a plurality of groups in the constant connection server;
• and
• pushing data from the constant connection server to at least one of the plurality of electronic devices belonging to a group associated with a group ID being designated.

A constant connection server comprising:

• a communication interface provided to constantly connect to a plurality of electronic devices;
• a memory that stores an association between constant connection IDs for specifying the plurality of electronic devices and group IDs for specifying a plurality of groups;
• and
• a processor that, by using the communication interface, pushes data to at least one of the plurality of electronic devices belonging to a group associated with a group ID being designated.