Patent ID: 8633804

Claim:
A radio frequency identification (RFID) system, comprising: a host, for generating a control signal comprising an identification code; a signal translating device, comprising: a network receiving/transmitting module, receiving the control signal via a network and generating a translated signal according to the control signal; an RFID receiving/transmitting module, coupled to the network receiving/transmitting module, for generating an access command according to the translated signal and transmitting the access command via an RF signal; and a plurality of RFID readers arranged according to a predetermined sequence, comprising a first RFID reader closest to the signal translating device lying within a signal transmission range of the signal translating device and other RFID readers, each of the other RFID readers lying only within a signal transmission range of a respective previous RFID reader and a respective next RFID reader according to the predetermined sequence; wherein the first RFID reader receives the access command from the signal translating device and, responsive to the identification code, is configured to generate an access signal according to the access command or to relay the access command to a next RFID reader according to the predetermined sequence; wherein the next RFID reader receives the access code from the first RFID reader and, responsive to the identification code, is configured to generate the access signal according to the access command or to relay the access command to the respective next RFID reader according to the predetermined sequence until a target RFID reader indicated by the indication code receives the access command; wherein the signal translating device provides a plurality of virtual RFID readers corresponding to the RFID readers, and the host communicates with the virtual RFID readers instead of directly communicating with the RFID readers; wherein when one target RFID reader from the plurality of RFID readers wishes to transmit tag information to the host, the tag information is transmitted to the signal translating device in a sequence reverse to the predetermined sequence, and the signal translating device translates a format of the tag information and transmits the translated tag information to the host.