Wireless passive radio frequency sensing system anti-collision data-transmission method
A data transmission method and radio frequency sensing technology, applied in the field of wireless passive sensing, can solve the problems of inferior theoretical performance, long response time sequence, serious frame conflict, etc., and achieve the effect of using less resources, simple logic, and high instruction efficiency
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[0058] Such as Figure 8 As shown, assume that the sensor node has an 8-bit address number, 4-bit random number and 8-bit counter, and the sensor detection data is 12 bits. There are 4 sensor nodes within the working range of the reader, and their addresses have been set. They are No. 1 00000011 (decimal 3), No. 2 00001100 (Decimal 12), No. 3 01101000 (Decimal 104), No. 4 00001100 (Decimal 12 ), where address numbers two and four conflict. The maximum value for reader queries is the default 2 8 That is 256. The logical bit sequence of the reader adopts the logical 1 sequence of Manchester encoding. The node's "one-bit answer" signal is a one-bit logic 1. Users can choose three functions: fast address number query, address number query with address number conflict detection, and address number query with data reading. When fast address number query is selected, the node does not have a pause counting state.
[0059] When the user selects the quick address number query func...
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