Array of Very Light Readers for Active RFID and Location Applications
First Claim
1. A method comprising:
- estimating whether a collision occurred between a plurality of wide band response signals, the wide band response signals being responsive to a first interrogation signal transmitted by a first reader;
when the collision is estimated to have occurred and the first reader received a first response from a particular tag;
transmitting, by the first reader, a second interrogation signal, the second interrogation signal initiating a communication session between the reader and the particular tag; and
transmitting, by the first reader, an acknowledgement packet to cause;
the tag to refrain from responding to a command during the communication session; and
a second reader to refrain from interrogating the particular tag during the communication session.
5 Assignments
0 Petitions
Accused Products
Abstract
An example method includes estimating whether a collision occurred between a plurality of wide band response signals, the wide band response signals being responsive to a first interrogation signal transmitted by a first reader; when the collision is estimated to have occurred and the first reader received a first response from a particular tag, transmitting, by the first reader, a second interrogation signal, the second interrogation signal initiating a communication session between the reader and the particular tag; and transmitting, by the first reader, an acknowledgement packet to cause the tag to refrain from responding to a command during the communication session; and a second reader to refrain from interrogating the particular tag during the communication session.
-
Citations
15 Claims
-
1. A method comprising:
-
estimating whether a collision occurred between a plurality of wide band response signals, the wide band response signals being responsive to a first interrogation signal transmitted by a first reader; when the collision is estimated to have occurred and the first reader received a first response from a particular tag; transmitting, by the first reader, a second interrogation signal, the second interrogation signal initiating a communication session between the reader and the particular tag; and transmitting, by the first reader, an acknowledgement packet to cause; the tag to refrain from responding to a command during the communication session; and a second reader to refrain from interrogating the particular tag during the communication session. - View Dependent Claims (2, 3, 4)
-
-
5. A system comprising:
-
a tag configured to receive a first interrogation signal and to transmit a first wide band response signal in response to the first interrogation signal; a first reader to transmit the first interrogation signal and to receive a plurality of wide band response signals including the first wide band response signal from the tag, the first reader configured to, in response to an estimation that a collision occurred between the plurality of response signals; transmit a second interrogation signal to initiate a communication session between the first reader and the tag; and transmit an acknowledgment packet to cause the tag to refrain from responding to a command during the communication session; and a second reader configured to, in response to receiving the acknowledgement packet, refrain from interrogating the tag during the communication session. - View Dependent Claims (6, 7, 8, 9)
-
-
10. A first reader, comprising:
-
communication hardware to; transmit a first interrogation signal; and receive a plurality of response signals in response to the first interrogation signal, the plurality of response signals including a first response signal from a tag; and a processor to; when a collision is estimated to have occurred between the plurality of response signals; provide a second interrogation signal to be transmitted by the communication hardware, the second interrogation signal to initiate a communication session between the first reader and the tag; and provide an acknowledgement packet to be transmitted by the communication hardware, the acknowledgement packet to prohibit; the tag from responding to a command during the communication session; and a second reader from interrogating the tag during the communication session. - View Dependent Claims (11, 12, 13, 14, 15)
-
Specification