Network system and method allocating addresses

A network system comprising a central control device and a plurality of terminal devices sequentially connected to the central control device along a predetermined wiring path from the central control device, communicating with the central control device,

• wherein terminal devices include a plurality of communication accessing units, one communication accessing unit for accessing the central control device and another communication accessing unit for accessing a subsequent terminal device positioned along the wiring path, an interface unit to change an access path of at least one of the communication accessing units to access either the central control device or the subsequent terminal device positioned on the wiring path, and a control unit controlling the interface unit to access the central control device when the interface unit determines that the terminal device has a temporary address or to access the subsequent terminal device positioned along the wiring path when a current address of the terminal device is not a temporary address or there is no current address, and
• the central control device sequentially allocates addresses to the terminal devices connecting to the central control device through the communication accessing unit.

A method of allocating an address of a network system including a central control device and a first terminal device communicating with the central control device, comprising:

• checking whether a routing table exists;
• and
• allocating an address to the terminal device if the routing table does not exist.

A network system comprising a central control means and a plurality of terminal means sequentially connected to the central control device along a predetermined communication path from the central control device, the system comprising:

• a terminal means, of the plurality of terminal means, including a communication accessing means for accessing the central control device and a subsequent terminal means, of the plurality of terminal means, positioned along the communication path, an interface means to manipulate the communication accessing means to access either the central control means or the subsequent terminal means positioned on the communication path, and a control means controlling the interface means to access the central control means when the interface means determines that the terminal means has a temporary address or to access the subsequent terminal means positioned along the communication path when a current address of the terminal means is not a temporary address or there is no current address, and the central control means sequentially allocates addresses to the plurality of terminal means connecting to the central control means through the communication accessing means.