Methods and apparatuses for identification
First Claim
1. A method to identify a tag of a plurality of tags, each tag having an identification code stored in a memory, said method comprising:
- broadcasting a command having a first data; and
receiving a response to said command from a tag;
wherein said response is associated with a bin of a plurality of bins, said bin corresponding to a value of a selected set of bits of information stored in said tag, the selected set of bits being a function of said first data.
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Accused Products
Abstract
An identification system includes a reader and one or more tags. The reader identifies tags such as radio frequency (RF) tags. The system divides a number space into n bins, wherein each bin is associated with m unique bits of the number space, and the number space contains the identification codes of the tags. A command is issued to test v bits of the number space. A response is received from a tag, wherein the response occurs when a first portion of an identification code of the tag matches the v bits of the number space. A timing of the response corresponds to a particular bin and m unique bits associated with the particular bin correspond to a second portion of the identification code.
148 Citations
129 Claims
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1. A method to identify a tag of a plurality of tags, each tag having an identification code stored in a memory, said method comprising:
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broadcasting a command having a first data; and
receiving a response to said command from a tag;
wherein said response is associated with a bin of a plurality of bins, said bin corresponding to a value of a selected set of bits of information stored in said tag, the selected set of bits being a function of said first data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method performed by a tag of a plurality of tags, each tag of the plurality of tags having an identification code stored in a memory of said tag, said method comprising:
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receiving a first data from a reader;
correlating said first data with a selected set of bits of information stored in the memory of said tag, the selected set of bits being a function of said first data; and
transmitting a response to said reader if said first data correlates with said set of bits, the response being associated with a bin of a plurality of bins, wherein the bin of said response corresponds to a value of the selected set of bits. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22)
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23. A method performed by a reader to identify a tag of a plurality of tags, each tag of the plurality of tags having an identification code and a memory, said method comprising:
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dividing a number space into n bins, wherein each bin is associated with a different value defined by m bits of said number space, and said number space being associated with information stored in the memories of said plurality of tags, n being an integer greater than two;
issuing a command to test a value defined by v bits of said number space; and
receiving a response from a tag of the plurality of tags, wherein said response occurs when a set of v bits of said information stored in said tag matches said value of v bits of said command, a timing of said response corresponding to a bin of said n bins, the value of the m bits associated with said bin matching a value of m selected bits of said selected information. - View Dependent Claims (24, 25, 26, 27, 28, 29)
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30. A method performed by a reader, said method comprising:
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issuing a command to a tag; and
receiving a response from said tag, wherein said response includes an identification code of said tag and said receiving and said issuing do not occur concurrently.
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31. A method to identify a tag of a plurality of tags, each tag of the plurality of tags having an identification code and a memory, said method comprising:
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receiving, by a tag of the plurality of tags, a command from a reader to test v bits of a number space, said number space corresponding to information stored by said tag; and
issuing a response to said reader if a value of said received v bits match a value of v corresponding bits of said information, wherein a timing of said response corresponds to a value of m bits of said stored information. - View Dependent Claims (32, 33, 34, 35, 36, 37)
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38. A method performed by a tag to identify a tag of the plurality of tags, each tag of the plurality of tags having an identification code, said method comprising:
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receiving a command from a reader to test v bits of a number space; and
issuing a response to said reader if a value of said v bits of the received command match a value of a first portion of said tag'"'"'s identification code, wherein said response includes said identification code.
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39. A method performed by a reader of a plurality of readers to identify a tag of a plurality of tags, each tag of the plurality of tags having an identification code, said method comprising:
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entering a quiescent mode in response to a first reader of the plurality of readers entering an active mode to perform a communication cycle, said first reader entering a quiescent mode for a first interval of time after completing said communication cycle; and
entering an active mode after detecting an absence of active reader transmissions for a second interval of time and after a first pseudo-random delay period. - View Dependent Claims (40, 41)
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42. A machine readable medium containing executable instructions, which when executed by a machine cause said machine to perform operations comprising:
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broadcasting a command having a first data; and
receiving a response to said command from a tag;
wherein the response is associated with a bin of a plurality of bins, the bin corresponding to a value of a selected set of bits of information stored in said tag, the selected set of bits being a function of said first data. - View Dependent Claims (43, 44, 45, 46, 47, 48, 49, 50, 51, 52)
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53. A machine readable medium containing executable instructions that when executed by a machine cause said machine to perform operations comprising:
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receiving a command broadcast by a reader, the command having a first data;
correlating said first data with a selected set of bits of information stored in a memory of said machine, the selected set of bits being a function of said first data; and
transmitting a response to said reader if said first data correlates with said set of bits, the response being associated with a bin of a plurality of bins, wherein the bin of said response corresponds to a value of the selected set of bits. - View Dependent Claims (54, 55, 56, 57, 58, 59)
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60. A machine readable medium containing executable instructions that when executed by a machine cause said machine to perform operations comprising:
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issuing a command to test a value defined by v bits of a number space, the number space having n bins, wherein each bin is associated with a different value defined by m bits of said number space, and said number space being associated with information stored in memories of a plurality of tags, n being an integer greater than two; and
receiving a response from a tag of the plurality of tags, wherein said response occurs when a set of v bits of said information stored in said tag matches said value of v bits of said command, a timing of said response corresponding to a bin of said n bins, the value of the m bits associated with said bin matching a value of m selected bits of said selected information. - View Dependent Claims (61, 62, 63, 64, 65, 66, 67)
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68. A machine readable medium containing executable instructions that when executed by a machine, cause said machine to perform operations comprising:
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issuing a command to a tag of a plurality of tags; and
receiving a response from said tag, wherein said response includes an identification code of said tag and said receiving and said issuing do not occur concurrently.
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69. A machine readable medium containing executable instructions that when executed by a machine cause said machine to perform operations comprising:
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receiving a command from a reader to test v bits of a number space, said number space corresponding to information stored by said machine; and
issuing a response to said reader if a value of said received v bits match a value of v corresponding bits of said information, wherein a timing of said response corresponds to a value of m bits of said stored information. - View Dependent Claims (70, 71, 72)
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73. The machine readable medium of claim L1, wherein the tag'"'"'s identification code matches an identification code of another tag of the plurality of tags.
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74. A machine readable medium containing executable instructions that when executed by a machine cause said machine to perform operations comprising:
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receiving a command from a reader to test v bits of a number space; and
issuing a response to said reader if a value of said v bits of the received command match a value of a first portion of said machine'"'"'s identification code. - View Dependent Claims (75, 76, 77, 78)
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79. A machine readable medium containing executable instructions that when executed by a machine of a reader of a plurality of readers cause said machine to perform operations comprising:
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entering a quiescent mode in response to a first reader of the plurality of readers entering an active mode to perform a communication cycle, said first reader entering a quiescent mode for a first interval of time after completing said communication cycle; and
entering an active mode after detecting an absence of active reader transmissions for a second interval of time and after a first pseudo-random delay period. - View Dependent Claims (80, 81)
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82. An apparatus to identify tags, each tag having an identification code, said apparatus comprising:
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a processor to provide a first data;
a transmitter to transmit said first data to a plurality of tags; and
a receiver to receive a response to said first data and provide received data to said processor, said response sent from a tag, wherein said response is associated with a bin of a plurality of bins, said bin corresponding to a value of a selected set of bits of information stored in said tag, the selected set of bits being a function of said first data. - View Dependent Claims (83, 84, 85, 86, 87)
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88. A tag comprising:
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a receiver to receive a first data from a reader;
a control unit to correlate said first data with a portion of information stored in said tag; and
a transmitter to transmit a response from said control unit to said reader if said first data matches said portion of said information, the response being associated with a bin of a plurality of bins, wherein the bin of said response corresponds to a value of a selected set of bits of said information, the selected set of bits being a function of the first data. - View Dependent Claims (89, 90, 91, 92)
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93. An apparatus to identify tags, each tag having an identification code, said apparatus comprising:
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a processor to send at least one command, wherein a number space is divided into n bins, wherein each bin is associated with m bits of said number space, and said number space containing said identification codes of said tags;
a transmitter to transmit said at least one command to test v bits of said number space; and
a receiver to receive a response from a tag and provide data from said response to the processor, wherein said response occurs when a first portion of an identification code of said tag matches a value of said v bits, a timing of said response corresponding to a particular bin, said particular bin being associated with a particular value of m bits of a second portion of said identification code. - View Dependent Claims (94, 95, 96, 97)
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98. A tag of a plurality of tag each having an identification code, said tag comprising:
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a receiver to receive a command from a reader, the command including v bits of a number space;
a processor to compare said received v bits with a first portion of said tag'"'"'s identification code; and
a transmitter to issue a response from said processor to said reader if said received v bits match said first portion of said identification code, wherein a timing of said response corresponds to a second portion of said identification code. - View Dependent Claims (99, 100, 101, 102, 103, 104)
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105. A reader to identify a tag of a plurality of tags, each tag having an identification code stored in a memory, said reader comprising:
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means for broadcasting a command having a first data; and
means for receiving a response to said command from a tag;
wherein said response is associated with a bin of a plurality of bins, said bin corresponding to a value of a selected set of bits of information stored in said tag, the selected set of bits being a function of said first data. - View Dependent Claims (106, 107, 108, 109)
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110. A tag of a plurality of tags each having an identification code, said tag comprising:
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means for receiving a first data from a reader;
means for correlating said first data with a selected set of bits of information stored in said tag, the selected set of bits being a function of said first data; and
means for transmitting a response to said reader if said first data correlates with said set of bits, the response being associated with a bin of a plurality of bins, wherein the bin of said response corresponds to a value of the selected set of bits. - View Dependent Claims (111, 112, 113)
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114. A reader to identify a tag of a plurality of tags, each tag of the plurality of tags having an identification code, said reader comprising:
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means for issuing a command to having a value defined by v bits of a number space, said number space having n bins, wherein each bin is associated with a different value defined by m bits of said number space, said number space being associated with information stored in said plurality of tags, n being an integer greater than two; and
means for receiving a response from a tag of the plurality of tags, wherein said response occurs when a set of v bits of said information stored in said tag matches said value of said v bits of said command, a timing of said response corresponding to a bin of said n bins, the value of the m bits associated with said bin matching a value of m selected bits of said selected information. - View Dependent Claims (115, 116, 117, 118, 119, 120, 121)
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122. A tag of a plurality of tags each having an identification code, said tag comprising:
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means for receiving a command from a reader to test v bits of a number space, said number space corresponding to information stored by said plurality of tags; and
means for issuing a response to said reader if a value of said received v bits match a value of v corresponding bits of said information, wherein a timing of said response corresponds to a value of m bits of said stored information. - View Dependent Claims (123, 124, 125)
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126. A tag of the plurality of tags each having an identification code, said tag comprising:
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means for receiving a command from a reader to test v bits of a number space; and
means for issuing a response to said reader if a value of said v bits of the received command match a value of a first portion of said tag'"'"'s identification code, the response including said tag'"'"'s identification code.
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127. A reader of a plurality of readers to identify a tag of a plurality of tags, each tag of the plurality of tags having an identification code, said reader comprising:
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means for entering a quiescent mode in response to a first reader of the plurality of readers entering an active mode to perform a communication cycle, said first reader entering a quiescent mode for a first interval of time after completing said communication cycle; and
means for entering an active mode after detecting an absence of active reader transmissions for a second interval of time and after a first pseudo-random delay period. - View Dependent Claims (128, 129)
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Specification