Remote radio frequency identification method
A long-distance radio frequency and identification method technology, which is applied in electromagnetic radiation induction, instruments, induction record carriers, etc., can solve the problems of long transmission distance of radio frequency technology, interference of radio frequency identification signals, low transmission rate, etc.
Inactive Publication Date: 2017-12-29
BEIJING INST OF COMP TECH & APPL
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Problems solved by technology
Radio frequency identification technology has its advantages, but there are also problems. Since radio frequency technology adopts wireless transmission mode, when the distance gradually expands, such as reaching 100 meters, it is easy to cover multiple identified devices in the same geographical range. When sending data at the same time, there will be interference between the radio frequency identification signals, and the farther the transmission distance of the existing radio frequency technology is, the lower the transmission rate will be. As a result, in a system, the data transmission of a single identification device to multiple identified devices must adopt software. Logical Backoff Algorithm
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[0019] In order to make the purpose, content and advantages of the present invention clearer, the specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0020] figure 1 Shown is a frame diagram of a long-distance radio frequency identification system of the present invention, as figure 1 As shown, a long-distance radio frequency identification system of the present invention includes a plurality of identified devices 1 and an identification device 2, and the identification device 2 is a device for collecting the information of the identified device 1, and the physical layer of the two devices can use a long-distance communication module , such as the LoRa communication module.
[0021] Such as figure 1 As shown, a long-distance radio frequency identification method and system of the present invention, the identified device 1 includes a radio frequency identification c...
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The invention discloses a remote radio frequency identification method, and the method comprises the steps: 1, enabling recognition equipment to set a Q value at first; 2, randomly selecting one number X from 0 to the Q-th power of 2 after recognized equipment receives the Q value, waiting for the product of X and a time slot, and transmitting response data to the recognition equipment, wherein the equipment with the X being zero transmits the response data at first, and a success command is returned to the recognized equipment if the recognition equipment receives the response data; 3, transmitting a unique identification of the equipment after the recognized equipment receives the success command; 4, transmitting a command to enable the recognized equipment, which transmits the unique identification of the equipment, not to respond to Q value broadcast after the recognition equipment receives a response identification number; 5, enabling the recognition equipment to broadcast a command of subtracting one from X; 6, subtracting one from the random numbers X after other recognized equipment receives the broadcast of subtracting one from X, enabling the recognized equipment with the X being one to become the recognized equipment with the X being zero, continuing to transmit a command, and repeatedly carrying out the steps 3-6 till all recognized equipment are recognized.
Description
technical field [0001] The invention relates to a long-distance radio frequency identification technology, in particular to a long-distance radio frequency identification method. Background technique [0002] With the continuous development of radio frequency identification technology, radio frequency identification has been integrated into people's life. From short-distance NFC card swiping to long-distance regional remote meter reading system, radio frequency identification technology is widely used. Radio frequency identification technology has its advantages, but there are also problems. Since radio frequency technology adopts wireless transmission mode, when the distance gradually expands, such as reaching 100 meters, it is easy to cover multiple identified devices in the same geographical range. When sending data at the same time, there will be interference between the radio frequency identification signals, and the farther the transmission distance of the existing rad...
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Login to View More IPC IPC(8): G06K7/10
CPCG06K7/10039
Inventor 车春立王佳赵琰蒋遂平张丹许家麟
Owner BEIJING INST OF COMP TECH & APPL