05955969 is referenced by 96 patents and cites 5 patents.

A method of preventing a response to a rouge poll message in an AVI system is presented. The method entails that during the transmission of the poll message from the interrogator to the transponder, wherein the poll message reflects off an undesirable position, thereby creating the origination of an undesirable poll message, i.e. a poll message which will be received by a wrong transponder, a jamming signal is also transmitted at the same frequency and from the point from which said reflected poll message originates. The jamming signal and the poll message create a rogue poll message as received by the transponder wherein at least one bit within the transmitted poll message is flipped. Transponders, upon receiving said rogue poll message, calculate the CRC and compare the calculated CRC with the received CRC. The rogue message should yield an invalid CRC, i.e. a CRC unlike the received CRC, and therefore, the transponder will fail to respond to the jammed poll message.

Title
Method to prevent rouge transponder responses in automatic vehicle identification systems
Application Number
8/826913
Publication Number
5955969
Application Date
April 9, 1997
Publication Date
September 21, 1999
Inventor
Loek D Hont
Plano
TX, US
Agent
Richard L Donaldson
Rebecca Mapstone Lake
Assignee
Texas Instruments Incorporated
TX, US
IPC
G08G 1/00
View Original Source