Method of inventorying transponders by means of a communication station
First Claim
1. A method of inventorying at least one transponder by means of a communication station, wherein the communication station emits an unmodulated carrier signal in a communications range, and wherein the transponder on entering the communications range generates a presence-signaling signal and emits the presence-signaling signal in the communications range, and wherein the communication station on receiving a presence-signaling signal emits an inventorying command signal in the communications range, and wherein the transponder on receiving the inventorying command signal emits a response signal in the communications range permitting the inventorying of the transponders, and wherein the communication station, on correctly receiving a response signal undertakes inventorying of the transponders, wherein the transponder emits the presence-signaling signal with a first signal duration and the response signal with a second signal duration, and wherein the first signal duration is shorter than the second signal duration, wherein the first signal duration and the second signal duration have a ratio of 1:
- X, and in that the value X lies in a range between X=10 and X=100, wherein the presence-signaling signal is not assigned to the transponder.
13 Assignments
0 Petitions
Accused Products
Abstract
In a method of inventorying a plurality of transponders (2) by means of a communication station (1) communicating with the transponders (2) in contactless manner, the communication station (1) emits an unmodulated carrier signal (NMCS) in a communications range of the communication station (1) and each transponder (2) on entering the communications range then emits a presence-signaling signal (PRES) and the communication station (1) on receiving a presence-signaling signal (PRES) then emits an inventorying command signal (INVS) and each transponder (2) on receiving the inventorying command signal (INVS) then emits a response signal (RESPS) permitting inventorying of the transponder (2) and the communication station (1) on correctly receiving a response signal (RESPS) then undertakes inventorying of the relevant transponder (2).
16 Citations
16 Claims
-
1. A method of inventorying at least one transponder by means of a communication station, wherein the communication station emits an unmodulated carrier signal in a communications range, and wherein the transponder on entering the communications range generates a presence-signaling signal and emits the presence-signaling signal in the communications range, and wherein the communication station on receiving a presence-signaling signal emits an inventorying command signal in the communications range, and wherein the transponder on receiving the inventorying command signal emits a response signal in the communications range permitting the inventorying of the transponders, and wherein the communication station, on correctly receiving a response signal undertakes inventorying of the transponders, wherein the transponder emits the presence-signaling signal with a first signal duration and the response signal with a second signal duration, and wherein the first signal duration is shorter than the second signal duration, wherein the first signal duration and the second signal duration have a ratio of 1:
- X, and in that the value X lies in a range between X=10 and X=100, wherein the presence-signaling signal is not assigned to the transponder.
- View Dependent Claims (2, 3, 11, 14, 15, 16)
-
4. A transponder for communication with a communication station, wherein transponder transmission means are provided for emitting and receiving signals, and wherein carrier signal detection means are provided for detecting an unmodulated carrier signal generated and emitted by the communication station and received by the transponder transmission means, and wherein presence-signaling signal generating means that can be activated as a function of the detection of an unmodulated carrier signal are provided for generating a presence-signaling signal, and wherein inventorying command signal detection means are provided for detecting an inventorying command signal generated and emitted by the communication station and received by the transponder transmission means, and wherein response signal generating means that can be activated as a function of the detection of the inventorying command signal are provided for generating a response signal permitting the inventorying of the transponder, wherein the presence-signaling signal generating means generates the presence-signaling signal with a first signal duration and wherein the response signal generating means generates the response signal with a second signal duration, and wherein the first signal duration is shorter than the second signal duration, wherein the first signal duration and the second signal duration have a ration of 1:
- X, the value X lying in a range between X=10 and X=100, wherein the presence-signaling signal is not assigned to the transponder.
- View Dependent Claims (5, 6, 12)
-
7. An integrated circuit for a transponder for communication with a communication station, wherein at least one connection is provided for emitting and receiving signals, and wherein carrier signal detection means are provided for detecting an unmodulated carrier signal generated and emitted by the communication station and received via at least one connection, and wherein presence-signaling signal generating means that can be activated as a function of the detection of an unmodulated carrier signal are provided for generating a presence-signaling signals, and wherein inventorying command signal detection means are provided for detecting an inventorying command signal generated and emitted by the communication station and received via at least one connection, and wherein response signal generating means that can be activated as a function of the detection of the inventorying command signal are provided for generating a response signal permitting the inventorying of the transponder, wherein the presence-signaling signal generating means generates the presence-signaling signal with a first signal duration and wherein the response signal generating means generates the response signal with a second signal duration, and wherein the first signal duration is shorter than the second signal duration, wherein the first signal duration and the second signal duration have a ratio of 1:
- X, and in that the value X lies in a range between X=10 and X=100, wherein the presence-signaling signal is not assigned to the transponder.
- View Dependent Claims (8, 9, 10, 13)
Specification