Abstract: A method for tracking events using a radio frequency identification (RFID) tag may include reserving a bit window in a memory on a radio frequency identification (RFID) tag, the bit window having multiple bits, randomly marking one of the bits in the bit window each time a RFID event occurs, counting a number of marked bits in the bit window, and determining a number of the RFID events using the counted number of the marked bits and a size of the bit window.

Abstract: A planogram specifying items of a item type associated with a first location may be determined, and item read events for the items of the item type may be received from a first receiver associated with the first location and from a second receiver associated with a second location. A first counting of the item read events associated with the first receiver may be determined, and a second counting of the item read events associated with the second receiver may be determined. A clustering algorithm may be applied to the first counting and the second counting to determine a first cluster corresponding to a first subset of the items and a second cluster corresponding to a second subset of the items. Then, for each cluster, it may be determined whether the item read events contained therein indicate a presence of the corresponding subset of the items at the second location and in non-compliance with the planogram.

Abstract: A method and a system are described for improved reading of Radio Frequency Identification (RFID) tags using correcting codes on sets of electronic tags. A reading device requests information from each of a set of electronic tags. The information includes an identification code and a portion of a codeword, the codeword contains a coded message with identification codes of all tags in the set. The information is received from a subset of the set of tags. Portions of the codeword from the received tag information of the subset of tags are assembled. A decoding component to decode the assembled portions and to construct the coded message from the assembled portions of the codeword. Information is individually received from a remaining set of the tags in the set of tags. An enterprise system processes the received information from all tags in the set.

Abstract: A method for tracing an item may include encrypting item information using an identity-based encryption scheme with a batch number for an item as an encryption key and communicating the encrypted item information for storage on a radio frequency identification (RFID) tag for attachment to the item.

Abstract: A planogram specifying items of a item type associated with a first location may be determined, and item read events for the items of the item type may be received from a first receiver associated with the first location and from a second receiver associated with a second location. A first counting of the item read events associated with the first receiver may be determined, and a second counting of the item read events associated with the second receiver may be determined. A clustering algorithm may be applied to the first counting and the second counting to determine a first cluster corresponding to a first subset of the items and a second cluster corresponding to a second subset of the items. Then, for each cluster, it may be determined whether the item read events contained therein indicate a presence of the corresponding subset of the items at the second location and in non-compliance with the planogram.

Abstract: A method for tracking events using a radio frequency identification (RFID) tag may include reserving a bit window in a memory on a radio frequency identification (RFID) tag, the bit window having multiple bits, randomly marking one of the bits in the bit window each time a RFID event occurs, counting a number of marked bits in the bit window, and determining a number of the RFID events using the counted number of the marked bits and a size of the bit window.

Abstract: A method and a system are described for improved reading of Radio Frequency Identification (RFID) tags using correcting codes on sets of electronic tags. In one embodiment, information is requested from each of a set of electronic tags. The information includes an identification code and a portion of a codeword, the codeword contains a coded message with identification codes of all tags in the set. The information is received from a subset of the set of tags. Portions of the codeword from the received tag information of the subset of tags are assembled. The coded message is constructed from the assembled portions of the codeword. Finally, individually receiving information from a remaining set of the tags in the set of tags. In one embodiment, the system includes a set of electronic tags and a reading device to request and receive information from each of the set of electronic tags.

Abstract: A method for tracing an item may include encrypting item information using an identity-based encryption scheme with a batch number for an item as an encryption key and communicating the encrypted item information for storage on a radio frequency identification (RFID) tag for attachment to the item.