Patent ID: 8108506

Claim:
An electronic device which communicates with at least one external device having a logical address selected from a plurality of logical addresses and a physical address, the electronic device comprising: a storage unit configured to store an address list in which a physical address of at least one external device communicating with the electronic device is registered so as to correspond to at least one logical address of said plurality of logical addresses; and a control module configured to transmit a command to check the connection of an external device to at least a first logical address of said plurality of logical addresses, to determine whether a physical address corresponding to the first logical address to which the command to check the connection of the external device has been transmitted, to transmit to the first logical address a command to obtain the physical address corresponding to the first logical address and allocated to the external device when the control module determines that there has been a response to the command to check the connection from the first logical address to which the physical address has not been registered in the address list, and to register the physical address included in a response to a command to obtain the physical address so as to correspond to the first logical address to which the command to check the connection has been transmitted in the address list stored in the storage unit.