active RFID system for Port Logistics using Multi-hop Communication and communication method of the same

The present invention is a current command and response message types on the standard to support a multi-hop communication while maintaining compatibility with the standard is not changed, and the other tags in the shadow area by using some of the fields that were not used in the conventional near tag by multi-hop communication methods as for providing a port logistics active RFID system and a communication method to communicate with the reader, in the port logistics active RFID system comprising a reader and the tag, the tag reader, or and a response message sending unit for sending his reply message from the other tags by the instruction receiving unit for receiving P2P command or a broadcast command in the reader, the command receiving unit which by transmitting a P2P command or a broadcast command in the reader the reader or other tags, P2P command or probe of a reader received from the command receiving unit And load transfer instruction to retransmit the multicast command to another tag part, and a response message receiving unit receiving a response message from the tag transmits a P2P command or broadcast command of the reader through the said command transfer, the command received by the command receiving unit If the broadcast commands to reconfigure the broadcast command to add a level value corresponding to come through a number of hops from the own tag ID and the leader in the broadcast instruction and received through the command reconstruction unit, and the instruction receiving unit operable to provide parts instruction transfer the level value and gave deliver orders to their tag of the broadcast came the command is through a few hops from information and reader distinguish between different tag command haejun retransmit the response message if the transfer instructions from the other tags Add an ID by re-reply message Sex and parents the parent tag for recording a sub-tag for transmitting a response message that is received with the response message reconstruction unit, from the response message receiving unit for providing a response message receiving unit to the child tag and transmits a broadcast command received from the command receiving unit by recording it with a tag it includes a child table for storing in the form of a tree topology of the network. Port Logistics, active RFID, 433MHz active, ISO / IEC 18000-7, multi-hop communication