Patent ID: 6763996
Filing Date: 2004-07-20
Classification: G06K

Abstract:
A method comprising the steps of:at a radio frequency identification device comprising a plurality of data fields: (a) transmitting a data symbol from a data field; (b) receiving an acknowledgement symbol; (c) comparing the transmitted data symbol to the received acknowledgement symbol (d) repeating steps a-c until data transmission is complete as long as each transmitted data symbol is equivalent to a corresponding received acknowledgement symbol; otherwise, maintaining the data field from which the last data symbol was transmitted, and temporarily suspending data transmission; (e) receiving a request for radio frequency identification devices temporarily suspended in a given data field to resume data transmission; and (f) the data field that was maintained is equivalent to the given data field identified in the request, repeating steps a-d, starting with a first symbol in the data field that was maintained; otherwise, continuing to temporarily suspend data transmission.