Method and system for calculating a user account balance in a recognition system
First Claim
1. A method of calculating a revised user account balance in a recognition system comprising a transponder in wireless electrical communication with an interrogator, the method comprising the steps of:
- a) transmitting from said transponder to said interrogator a user account balance;
b) receiving in said interrogator said user account balance;
c) Calculating in said interrogator said revised user account balance, a factor in said calculation being said user account balance;
d) Transmitting from said interrogator to said transponder said revised user account balance; and
e) receiving in said transponder said transmission from said interrogator;
f) transmitting from said transponder to said interrogator a verification user account balance comprising a user account balance derived from said transmission from said interrogator.
1 Assignment
0 Petitions
Accused Products
Abstract
A system and method in which a transponder (14) is operable to transmit an original user account balance to an interrogator (12), which in turn calculates a revised user account balance and transmits the revised user account balance to the transponder (14). In one embodiment of the invention, the transponder (14) is further operable to transmit a verification user account balance back to the interrogator (12), which then compares verification user account balance to the revised user account balance that was earlier calculated and stored in an interrogator memory.
186 Citations
15 Claims
-
1. A method of calculating a revised user account balance in a recognition system comprising a transponder in wireless electrical communication with an interrogator, the method comprising the steps of:
-
a) transmitting from said transponder to said interrogator a user account balance; b) receiving in said interrogator said user account balance; c) Calculating in said interrogator said revised user account balance, a factor in said calculation being said user account balance; d) Transmitting from said interrogator to said transponder said revised user account balance; and e) receiving in said transponder said transmission from said interrogator; f) transmitting from said transponder to said interrogator a verification user account balance comprising a user account balance derived from said transmission from said interrogator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A method of calculating a revised user account balance in a recognition system, the method comprising the steps of:
-
a) transmitting from said transponder to said interrogator a user account balance; b) receiving in said interrogator said user account balance; c) calculating in said interrogator said revised user account balance, said revised user account balance being the user account balance less the toll to be charged to the particular vehicle at the particular toll area; d) transmitting from said interrogator to said transponder said revised user account balance; e) receiving in said transponder said transmission from said interrogator; f) transmitting from said transponder to said interrogator a verification user account balance derived from said transmission from said interrogator; and g) comparing said verification user account balance to the revised user account balance so that the interrogator may verify that the revised user account balance was properly received in said transponder. - View Dependent Claims (13)
-
-
14. An interrogator for a recognition system, said interrogator comprising:
-
a) a transponder, said transponder having a memory for maintaining user account balances, a transmitter in electrical communication with said memory, said transmitter for transmitting an original user account balance, and a receiver in electrical communication with said memory for receiving a revised user account balance; b) an interrogator, said interrogator having a receiver for receiving said original user account balance, a control circuit in electrical communication with said receiver for computing a revised user account balance, said computation using said original user account balance as a factor, a transmitter in electrical communication with said control circuit for transmitting said revised user account balance to said transponder, and a memory for receiving from said transponder a transmission comprising a verification user account balance and further operable to compare said verification user account balance to said revised user account balance received in the transmission from said transponder. - View Dependent Claims (15)
-
Specification