Methods of processing wireless communication, methods of processing radio frequency communication, and related systems
First Claim
1. A wireless communications method comprising:
- sending a RF transmission from an interrogator configured for transmitting and receiving RF communication data;
receiving the transmission at a plurality of RF identification devices respectively having integrated circuitry including a receiver configured for receiving RF transmissions by the interrogator and a transmitter configured to transmit a reply back to the interrogator; and
prior to the transmitting of the reply, respective RF identification devices delaying transmission of their respective replies to the interrogator for an amount of time which is less than the amount of time required to transmit the reply, said delaying being initiated by the RF identification device responsive to RF communication data received from the interrogator, the amount of delay being different for different of the RF identification devices, wherein if there is a collision between replies from two RF identification devices, the collision can be more readily detected by the interrogator, using a checksum analysis, than if there was no delay.
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Accused Products
Abstract
Methods of processing wireless communication include providing at least one interrogator configured for transmitting and receiving wireless communication data. A plurality of identification devices are provided and are configured for receiving wireless communication data transmitted by the interrogator. Responsive to receiving such communication data, the devices are capable of generating and transmitting a reply back to the interrogator. Preferably, transmitted replies are delayed for different determinable amounts of time which enables the interrogator to detect multiple replies. In a preferred implementation, the wireless communication is radio frequency communication. In another preferred implementation, each device is capable of calculating its own delay utilizing a random value generator. Related system circuitry is described.
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Citations
27 Claims
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1. A wireless communications method comprising:
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sending a RF transmission from an interrogator configured for transmitting and receiving RF communication data;
receiving the transmission at a plurality of RF identification devices respectively having integrated circuitry including a receiver configured for receiving RF transmissions by the interrogator and a transmitter configured to transmit a reply back to the interrogator; and
prior to the transmitting of the reply, respective RF identification devices delaying transmission of their respective replies to the interrogator for an amount of time which is less than the amount of time required to transmit the reply, said delaying being initiated by the RF identification device responsive to RF communication data received from the interrogator, the amount of delay being different for different of the RF identification devices, wherein if there is a collision between replies from two RF identification devices, the collision can be more readily detected by the interrogator, using a checksum analysis, than if there was no delay. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A wireless communications method comprising:
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sending an RF transmission from an interrogator configured for transmitting and receiving RF communication data;
receiving the transmission at a plurality of RF identification devices respectively having integrated circuitry including a receiver configured for receiving RF transmissions by the interrogator and a transmitter configured to transmit a backscatter reply back to the interrogator while the transmitter transmits a carrier; and
prior to the transmitting of the reply, respective RF identification devices delaying transmission of their respective replies to the interrogator by an amount of time that is less than a length of the reply, the amount of time being determined using respective random number generators, said delaying being initiated by the RF identification device responsive to RF communication data received from the interrogator, wherein if there is a collision between replies from two RF identification devices, the collision can be more readily detected by the interrogator, using a checksum analysis, than if there was no delay; and
determining, with the interrogator, using a checksum analysis, whether a valid reply was received. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A wireless communications method comprising:
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providing an interrogator configured for transmitting and receiving wireless communication data;
providing a plurality of wireless identification devices respectively including integrated circuitry configured for receiving wireless communication data transmitted by the one interrogator and responsive to said receiving generating and transmitting a reply back to the interrogator; and
prior to the transmitting of the reply, respective wireless identification devices delaying transmission of their respective replies to the interrogator for an amount of time less than a length of the reply, said delaying being initiated by the wireless identification device responsive to wireless communication data received from the interrogator, wherein, if there is a collision between replies from two wireless identification devices, the reply will be corrupted; and
determining, with the interrogator, using a checksum analysis, whether a valid reply was received. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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22. A wireless communications system comprising:
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an interrogator configured for transmitting and receiving RF communication data, the interrogator including circuitry configured to perform a checksum analysis on received RF communication data; and
a plurality of RF identification devices respectively including integrated circuitry configured to receive RF communication data transmitted by the interrogator and to transmit a reply back to the interrogator in response to receiving RF communication data from the interrogator, the respective RF respective RF identification devices including circuitry configured to delay transmission of their respective replies to the interrogator for an amount of time that is less than a length of the reply and in response to RF communication data received from the interrogator, the circuitry including respective random number generators, wherein if there is a collision between replies from two RF identification devices, the collision can be more readily detected by the interrogator, using a checksum analysis, than if there was no delay. - View Dependent Claims (23, 24, 25)
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26. A wireless communications method comprising:
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providing an interrogator configured for transmitting and receiving RF communication data;
providing a plurality of RF identification devices respectively including integrated circuitry configured for receiving RF communication data transmitted by the interrogator and responsive to said receiving generating for transmitting a reply back to the interrogator; and
prior to the transmitting of the reply, respective RF identification devices delaying transmission of their respective replies to the interrogator for an amount of time which is not so long as to purposely prevent a collision between replies, said delaying being initiated by the RF identification device responsive to RF communication data received from the interrogator, the amount of delay being different for different of the RF identification devices, wherein the RF identification devices include respective random number generators, and wherein the delaying comprises the respective RF identification devices generating respective random delays to delay individual device replies using the respective random number generators by generating binary random numbers and masking a plurality of bits and using the random numbers to calculate individual respective determinable amounts of time in a range of from 0 to 7 times a predetermined amount of time and being less than or equal to ten microseconds.
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27. A wireless communications apparatus comprising:
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an interrogator configured for transmitting and receiving RF communication data;
a plurality of RF identification devices respectively including integrated circuitry configured for receiving RF communication data transmitted by the interrogator and responsive to said receiving generating for transmitting a reply back to the interrogator, the respective RF identification devices delaying transmission of their respective replies to the interrogator for an amount of time which is not so long as to purposely prevent a collision between replies, said delaying being initiated by the RF identification device responsive to RF communication data received from the interrogator, the amount of delay being different for different of the RF identification devices, the RF identification devices including respective random number generators, the delaying comprising the respective RF identification devices generating respective random delays to delay individual device replies using the respective random number generators by generating binary random numbers and masking a plurality of bits and using the random numbers to calculate individual respective determinable amounts of time in a range of from 0 to 7 times a predetermined amount of time and being less than or equal to ten microseconds.
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Specification