Abstract:
PURPOSE: A communication apparatus and method thereof are provided to transmit a downstream packet to a portable terminal through a downstream agent by selecting the downstream agent from adjacent sensor nodes. CONSTITUTION: A portable terminal transmits query to an upstream agent(S810). The upstream agent cap encapsulates the query(S820). A gateway transmits the upstream packet to a server(S830). The gateway receives the response of the server(S840). The gateway transmits the response to a downstream agent(S850). The downstream agent transmits the response to the portable terminal(S860).
Abstract:
The present invention enables the high-speed download of a large volume of data stored in a tag memory without a remarkable change in conventional wireless communication techniques. According to one aspect of the present invention, an RFID tag comprises: a transmitting unit for transmitting a download command for instructing the download of tag data stored in a user memory bank of the RFID tag; and a receiving unit for receiving, from the RFID tag, tag data in a plurality of record block units, each of which is smaller than the size of the memory bank.