CN113225734A - Base station-like type energy supply encryption method based on RFID passive transmission - Google Patents
Base station-like type energy supply encryption method based on RFID passive transmission Download PDFInfo
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- CN113225734A CN113225734A CN202110341132.0A CN202110341132A CN113225734A CN 113225734 A CN113225734 A CN 113225734A CN 202110341132 A CN202110341132 A CN 202110341132A CN 113225734 A CN113225734 A CN 113225734A
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000004891 communication Methods 0.000 claims abstract description 23
- 230000000694 effects Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 5
- 238000009825 accumulation Methods 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 230000009057 passive transport Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000009514 concussion Effects 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/20—Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
Abstract
The invention relates to the technical field of data transmission, in particular to a base station-like energy supply encryption method based on RFID passive transmission, which comprises the steps that a transmitting tower constantly receives a command of a reader/receiving end in a local area in a silent mode; when a Query command sent by a reader/receiving end is received, the transmitting tower starts to send continuous waves with encryption information to the tag for encryption and reflection communication of the tag; the reader receives the reflected wave from the label and the encrypted information of the continuous wave sent by the transmitting tower, and corresponding decoding is carried out at the receiving end; according to the invention, the energy supply is ensured and the encryption effect is ensured by additionally arranging the transmitting tower; and the stability of transmission and encryption requirements are improved.
Description
Technical Field
The invention relates to the technical field of data transmission, in particular to a base station-like energy supply encryption method based on RFID passive transmission.
Background
In the future internet of things, network nodes can be passive (battery free), that is, the nodes do not have to be equipped with or mainly rely on power supply equipment such as batteries, and can obtain energy from the environment and support sensing, transmission and distributed computation of data. This new type of network is also known as a passive transport network. The passive transmission network is a wireless network which takes energy as a center and takes data as a core, and has the following characteristics:
1. energy oscillation
Because the node can acquire energy from the surrounding environment, the energy of the node is not a single static change trend from high to low, but is in a dynamic change state from high to low. When a node is performing a transmission or computation task, its energy accumulation may decrease; when a node begins to draw energy from the environment, its energy accumulation may rise. Thus, the energy of the passive transport network node accumulates high and low oscillations.
2. Loss of energy
The acquisition of the energy of the passive transmission network nodes has randomness and instability, so that the energy distribution of the whole network is unbalanced and greatly different, and the cooperative working capability of the passive nodes is low.
3. Limited energy
The power of the environmental energy collected by the microchip is very weak, generally on the order of nano watt (nW) to micro watt (μ W), and the microsensor is limited in external dimensions and has limited node power storage capability.
4. Connectivity vulnerability
The connectivity of the network is directly influenced by the energy of each node. When the energy of some nodes is lower than a certain level, the nodes become isolated nodes, and the network is disconnected. Due to the concussion of energy, the connectivity of the network is fragile, intermittent and difficult to maintain constant connectivity.
5. Ultra low duty cycle
The average working power required by driving the miniature sensing node is 3-6 orders of magnitude higher than the collected power, the node needs long-time energy storage to meet the energy required by the work of the node, and the node cannot work during energy storage. Therefore, the nodes are in a discontinuous working mode, the network is in a non-working state most of the time, and the duty ratio is ultralow.
At present, a passive transmission network is centered on energy, the energy is crucial to the performance of the network, and although the energy of passive nodes randomly obtained from the environment is wide, the problem of insufficient energy enrichment exists. In the face of trillions of passive nodes of the future Internet of things, the energy in the close environment is not enough to meet the development of the future Internet of things and support the passive nodes to carry out complex encryption and communication algorithms. In order to solve the problem of energy of a future passive transmission network, a special energy supply device should be provided for the nodes to meet the increasing demand of the passive nodes on energy, and meanwhile, in order to meet various future challenges, such as information stealing and various problems caused by energy restriction of the passive nodes, a new solution can be developed on the basis of a transmitting tower.
The passive tag in the existing backscatter system has two working states: absorbing signal energy and reflecting the signal. However, the existing passive tag can only save energy cost through a simple encoding mode, but sacrifices better and more complex encryption and communication algorithms.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the base station-like energy supply encryption method based on RFID passive transmission solves the problems in the prior art.
In order to solve the technical problems, the invention adopts the technical scheme that: a base station-like energy supply encryption method based on RFID passive transmission comprises
The transmitting tower is silent and continuously receives the command of the reader/receiving end in the area;
when a Query command sent by a reader/receiving end is received, the transmitting tower starts to send continuous waves with encryption information to the tag for encryption and reflection communication of the tag;
the reader receives the reflected wave from the label and the encrypted information of the continuous wave sent by the transmitting tower, and corresponding decoding is carried out at the receiving end.
The invention has the beneficial effects that: by additionally arranging the transmitting tower, the supply of energy is ensured, and the encryption effect is ensured; and the stability of transmission and encryption requirements are improved.
Drawings
Fig. 1 is a schematic diagram of a hardware direction of a base station-like energy supply encryption method based on RFID passive transmission according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of ranges between tags;
fig. 3 is a communication flow time domain diagram of a base station-like energy supply encryption method based on RFID passive transmission according to an embodiment of the present invention;
fig. 4 is a flow chart illustrating the rules of energy usage of a base station-like energy supply encryption method based on RFID passive transmission according to an embodiment of the present invention.
Detailed Description
In order to explain technical contents, achieved objects, and effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
Referring to fig. 1 to 4, a base station-like energy supply encryption method based on RFID passive transmission includes
The transmitting tower is silent and continuously receives the command of the reader/receiving end in the area;
when a Query command sent by a reader/receiving end is received, the transmitting tower starts to send continuous waves with encryption information to the tag for encryption and reflection communication of the tag;
the reader receives the reflected wave from the label and the encrypted information of the continuous wave sent by the transmitting tower, and corresponding decoding is carried out at the receiving end.
As can be seen from the above description, the additional arrangement of the transmitting tower ensures the supply of energy and the encryption effect; and the stability of transmission and encryption requirements are improved.
Further, the communication between the reader and the tag follows the EPC C C1G2 standard protocol.
Further, in the communication between the reader and the tag, the reader continuously sends a Query command to the tag, when only one tag responds in one time slot, the time slot is valid, otherwise, the time slot is discarded.
Further, after receiving the Query command, the TAG sends RN16, the reader sends ACK confirmation after receiving RN16, and after receiving ACK, the TAG returns its TAG ID to complete reading of the TAG by the reader;
and the above process is repeated.
Further, when no RN16 replies, the reader will continue to send Query command, which is detected by the transmitting tower and used to determine whether there is a communication need in the area by receiving the Query command, and then choose whether to send encrypted continuous wave.
Example one
A base station-like energy supply encryption method based on RFID passive transmission comprises
The transmitting tower is silent and continuously receives the command of the reader/receiving end in the area;
when a Query command sent by a reader/receiving end is received, the transmitting tower starts to send continuous waves with encryption information to the tag for encryption and reflection communication of the tag;
the reader receives the reflected wave from the label and the encrypted information of the continuous wave sent by the transmitting tower, and corresponding decoding is carried out at the receiving end.
The communication between the reader and the tag follows EPC C C1G2 standard protocol.
In the communication between the reader and the tag, the reader continuously sends a Query command to the tag, when only one tag responds in one time slot, the time slot is valid, otherwise, the time slot is discarded.
After receiving the Query command, the TAG sends RN16, the reader sends an ACK acknowledgement after receiving RN16, and after receiving the ACK, the TAG returns the TAG ID of the TAG to finish reading the TAG by the reader;
and the above process is repeated.
When no RN16 replies, the reader will continue to send Query commands, which the transmitting tower will detect and determine whether the area has communication needs by receiving the Query commands, and then choose whether to send encrypted continuous waves.
The design scheme of the invention is to add base station-like energy supply points in a passive transmission network, and a schematic diagram is shown in figure 1. The number of the energy points is set properly according to the distribution setting of the passive rfid tags and the radiation range of the energy supply points. While the communication between the tags is subject to malicious eavesdropping, as shown in fig. 2, and therefore the continuous wave CW transmitted by the tower is encrypted.
The communication between the reader and the tag follows the EPC C C1G2 standard protocol, in the communication between the reader and the tag, the reader continuously sends a Query command to the tag, when only one tag responds in one time slot, the time slot is valid, otherwise, the time slot is discarded. After receiving the Query command, the TAG sends RN16, the reader sends ACK acknowledgement after receiving RN16, and after receiving ACK, the TAG returns its TAG ID to complete reading of the TAG by the reader, and a communication flow time domain diagram is shown in fig. 3. The process then continues to loop. When no RN16 replies, the reader will continue to send Query command, which is detected by the transmitting tower and used to determine whether the area has communication need by receiving the Query command, and then choose whether to send the encrypted continuous wave CW.
The rule flow chart of energy usage is shown in fig. 4:
the transmitting tower is silent and continuously receives the command of the reader or the receiving end in the area;
when receiving a query start command sent by a reader, for example, a transmitting tower starts to send a continuous wave CW with encryption information for the tag for encryption and reflection communication of the tag;
the reader receives the reflected wave from the label and the encrypted information of the continuous wave CW sent by the transmitting tower, and corresponding decoding is carried out at the receiving end.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to the related technical fields, are included in the scope of the present invention.
Claims (5)
1. A base station-like energy supply encryption method based on RFID passive transmission is characterized by comprising the following steps
The transmitting tower is silent and continuously receives the command of the reader/receiving end in the area;
when a Query command sent by a reader/receiving end is received, the transmitting tower starts to send continuous waves with encryption information to the tag for encryption and reflection communication of the tag;
the reader receives the reflected wave from the label and the encrypted information of the continuous wave sent by the transmitting tower, and corresponding decoding is carried out at the receiving end.
2. The base station-like energy supply encryption method based on RFID passive transmission according to claim 1, wherein the communication between the reader and the tag follows EPC C1G2 standard protocol.
3. The base station-like energy supply encryption method based on RFID passive transmission as claimed in claim 1, wherein in the communication between the reader and the tag, the reader continuously sends Query command to the tag, when only one tag responds in a time slot, the time slot is valid, otherwise the time slot is discarded.
4. The base station-like energy supply encryption method based on RFID passive transmission as claimed in claim 3, wherein the TAG sends RN16 after receiving the Query command, the reader sends ACK acknowledgement after receiving RN16, and the TAG returns its TAG ID after receiving ACK, thereby completing the reading of the TAG by the reader;
and the above process is repeated.
5. The RFID passive transmission-based base station-like energy supply encryption method as claimed in claim 4, wherein when no RN16 replies, the reader continuously sends a Query command, which is detected by the transmitting tower and used for judging whether the area has a communication requirement by receiving the Query command, thereby selecting whether to send the encrypted continuous wave.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113645577A (en) * | 2021-08-25 | 2021-11-12 | 国网浙江省电力有限公司双创中心 | Wireless communication method, device, equipment and readable storage medium |
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