Patent ID: 7538676

Claim:
A computer-implemented method for swapping tag information, said method comprising: first reading, using a first software process, a first plurality of radio frequency identifiers corresponding to a first plurality of objects, the first reading performed at a first portal by a first RFID reader, wherein the first reading is performed while unloading the first plurality of objects; retrieving a first manifest data corresponding to the first plurality of objects, the first manifest data including a first plurality of expected identifiers corresponding to a first plurality of objects expected to be received at the first portal; first comparing the first plurality of expected identifiers to the first plurality of radio frequency identifiers read by the first RFID reader; second reading, using a second software process, a second plurality of radio frequency identifiers corresponding to a second plurality of objects, the second reading performed at a second portal by a second RFID reader, wherein the second reading is performed while unloading the second plurality of objects; retrieving a second manifest data corresponding to the second plurality of objects, the second manifest data including a second plurality of expected identifiers corresponding to a second plurality of objects expected to be received at the second portal; second comparing the second plurality of expected identifiers to the second plurality of radio frequency identifiers read by the second RFID reader; first identifying, based on the first comparison, one or more of the first plurality of expected identifiers that are not included in the first plurality of radio frequency identifiers, the first identifying resulting in one or more missing identifiers; second identifying, based on the second comparison, one or more of the second plurality of radio frequency identifiers that are not included in the second plurality of expected identifiers, the second identifying resulting in one or more extra identifiers; third comparing the one or more extra identifiers with the one or more missing identifiers; third identifying, based on the third comparison, one or more cross-read identifiers corresponding to one or more objects being unloaded at the first portal with radio frequency identifiers that were read by the second portal's RFID reader; adding the cross-read identifiers to the first plurality of radio frequency identifiers; and removing the cross-read identifiers from the second plurality of radio frequency identifiers.