METHOD FOR HANDLING COLLISION IN AN IDENTIFICATION SYSTEM
First Claim
1. A method for handling collision in an identification systemthe method comprising the following steps:
- the reader device transmits an initialization command to a first transponder and to a second transponder;
upon receiving the initialization command, the first transponder and the second transponder enter into a muted state, and in the muted state the first transponder and the second transponder do not respond to commands from a reader device;
in a randomly determined first start time slot the first transponder enters into an un-muted state and the first transponder remains in the un-muted state until the reader device sends a mute command to the first transponder;
in a randomly determined second start time slot the second transponder enters into an un-muted state and the second transponder remains in the un-muted state until the reader device sends a mute command to the second transponder.
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Accused Products
Abstract
A method for handling collision in an identification system where the identification system includes a reader, a first transponder and a second transponder. The method involves the reader transmitting an initialization command to the first transponder and to the second transponder; upon receiving the initialization command, the first transponder and the second transponder enter into a muted state where the first transponder and the second transponder do not respond to commands from the reader; in a randomly determined first start time slot the first transponder enters into an un-muted state and the first transponder remains in the un-muted state until the reader sends a mute command to the first transponder; in a randomly determined second start time slot the second transponder enters into an un-muted state and the second transponder remains in the un-muted state until the reader sends a mute command to the second transponder.
7 Citations
5 Claims
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1. A method for handling collision in an identification system
the method comprising the following steps: -
the reader device transmits an initialization command to a first transponder and to a second transponder; upon receiving the initialization command, the first transponder and the second transponder enter into a muted state, and in the muted state the first transponder and the second transponder do not respond to commands from a reader device; in a randomly determined first start time slot the first transponder enters into an un-muted state and the first transponder remains in the un-muted state until the reader device sends a mute command to the first transponder; in a randomly determined second start time slot the second transponder enters into an un-muted state and the second transponder remains in the un-muted state until the reader device sends a mute command to the second transponder. - View Dependent Claims (2, 3, 4)
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5. An identification system comprising a reader device, a first transponder and a second transponder,
wherein the reader device is arranged to transmit an initialization command to the first transponder and to the second transponder; -
wherein the first transponder and the second transponder are arranged to enter into a muted state upon receipt of the initialization command; wherein, in the muted state, the first transponder and the second transponder are arranged to refrain from responding to commands from the reader device; wherein, in a randomly determined first start time slot, the first transponder is arranged to enter into an un-muted state and the first transponder is arranged to remain in the un-muted state until the reader device sends a mute command to the first transponder; wherein, in a randomly determined second start time slot, the second transponder is arranged to enter into an un-muted state and the second transponder is arranged to remain in the un-muted state until the reader device sends a mute command to the second transponder.
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Specification