CN114171175A - Hospital material fine management system based on RFID and multi-terminal communication - Google Patents
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Abstract
The invention belongs to the field of medical logistics, and particularly relates to a hospital material fine management system based on RFID and multi-terminal communication, which comprises an NBLOT system, a medical material management system and a frequency mixing network system; the frequency mixing network system comprises X-type gateways, Y-type gateways, common-frequency nodes and different-frequency nodes, wherein the X-type gateways, the common-frequency nodes and the different-frequency nodes can be connected through uplink channels or downlink channels, the Y-type gateways, the common-frequency nodes and the different-frequency nodes can also be connected through uplink channels or downlink channels, the X-type gateways and the Y-type gateways are symmetrically deployed in a half-duplex mode, a PDA is used for encrypting an ID of a special medical material and generating an authentication code SID, the special material is packaged, the ID of the material and the encrypted authentication code SID are incorporated into an RFID label, after the special material enters a warehouse, a department reads the ID and SID of the special medical material by using the PDA terminal, and then the material is taken out.
Description
Technical Field
The invention belongs to the field of medical logistics, and particularly relates to a hospital material fine management system based on RFID and multi-terminal communication.
Background
RFID is one of the core technologies of the Internet of things. The internet of things collects various important information such as light, electricity, position, images and the like through technologies such as sensors, radio frequency identification technologies (RFID) and 3S, connection, perception, identification, analysis, interaction and management of objects and people are achieved on the basis of ubiquitous network and cloud computing, and the technology based on the RFID is a technology for achieving automatic identification through storage of radio frequency identification tags or wireless transceivers and non-contact data sending.
The traditional RFID system relates to patents such as CN 214311758U, CN 214278407U and CN 109934031B, which mainly locate passive tags and obtain location information through RFID, but at present, the intensive logistics management of hospitals involves the problem of multi-terminal communication, the problem of node conflict of each department is difficult to solve, and the problems of delay and data privacy security of communication at the edge terminal of each department are not solved.
Disclosure of Invention
The invention aims to provide a hospital material fine management system based on RFID and multi-terminal communication, which solves the problem that an RFID communication elbow in a hospital shares a calculation strategy and solves the problems of time delay of Lora communication and department node conflict.
In order to achieve the purpose, the invention provides the following technical scheme: a hospital material fine management system based on RFID and multi-terminal communication comprises an NBLOT system, a medical material management system and a mixing network system;
the frequency mixing network system comprises an X-type gateway, a Y-type gateway, a same-frequency node and a different-frequency node, wherein the X-type gateway is connected with the same-frequency node and the different-frequency node through an uplink channel or a downlink channel, the Y-type gateway is connected with the same-frequency node and the different-frequency node through an uplink channel or a downlink channel, and the X-type gateway and the Y-type gateway are symmetrically deployed in a half-duplex manner;
the NBLOT system comprises a plurality of Lora communication modules and a terminal receiving module, the PHY of each Lora communication module is linear spread spectrum coding, and the MAC layer of the terminal receiving module is a LoRaWAN protocol management node;
the medical material management system comprises record management, label management, tracing management and tracing statistics, wherein the record management comprises medical material allocation of RFID labels, logistics sending and statistics labels.
Preferably, the uplink channel or the downlink channel of the X-type gateway and the Y-type gateway have different frequency points, and the uplink frequency and the downlink frequency are different and opposite.
Preferably, the method comprises the following steps:
s1, firstly, a hospital builds an NB-LOT-based Internet of things module, and builds a multi-channel communication node by using Lora, wherein a terminal node is started by an ALOHA protocol and initiates a competition channel requirement, a star topology network is built by a Lora network communication architecture in the hospital, and a communication system between an internal logistics terminal and each department is built;
s2, the NBLOT system analyzes a backoff mechanism, constructs the times of repeated penetration and the length of a cache region under a single terminal, and then solves the steady-state distribution throughput of the hospital warehouse;
s3, distributing the RFID labels for medical product allocation according to the throughput, and allocating the RFID labels for workers in the medical material management system;
s4, adding new responsibility subareas after the hospital logistics materials enter, storing a secret key and reasonably storing a secret key by a system administrator through the management of the medical materials and combining the real coding requirements of the medical materials, and placing the public key in the special label managed PDA for the special medical materials;
s5, using PDA to encrypt the ID of special medical material and generate the identification code SID, packaging the special material, then merging the material ID and the encrypted identification code SID into the RFID label, after entering the warehouse, the department uses PDA terminal to read the ID and SID of special medical material, then taking out the material;
preferably, for step S1, the Lora gateway parameters are deployed between each department inside the hospital, and the transmitting frequency of each department gateway is at least 17dBm, wherein the marginal transmission rate of communication between Lora terminal nodes between each department is:
wherein BW is network bandwidth, xi is uplink transmission rate, SINRlTo transmit the threshold, and Lora is lossy at each terminal communication in the hospital, where the fitted loss model is:
L＝69.55+26.16lgfc-13.82lght-a(hr)+(44.9-6.55lght)lgd，，L0
wherein f iscFor the Lora operating frequency, htTo a launch height, hrFor a second department, L0Is the path loss threshold.
Preferably, for step S2, the encryption algorithm includes the steps of:
s11, in the encryption stage, reading the ID of the special medical material from the RFID label on the package, encrypting the ID of the medical material by using an encryption function to generate a CID, writing the ID of the material and an authentication code into a system memory, and locking the memory;
s12, then, carrying out authentication, wherein a department applies for communication through a Lora node, and reads the ID and the authentication code CID of the special medical product from the RFID label by using the RFID terminal;
and S13, finally, decrypting the CID by using the decryption function and generating the PID code for decryption.
Preferably, for step S2, the backoff mechanism of the NBLOT system includes the following steps:
s21, the hospital logistics terminal initializes all nodes, and each department Lora node establishes its respective RTT mapping table to make the nodes in idle state;
s22, the hospital logistics terminal sends a request to send RTS packet to department target node, carrying source ID and destination ID, and sends data packet number, if department does not receive CTS packet expected in a specified time, then communication is stopped;
and S23, if both sides receive the CTS packet, entering a data formal transceiving stage, continuously updating the transmission delay RTT of the destination end by each Lora node, and loading the delay update of the logistics information into the RTS packet and the CTS packet.
Preferably, the gateway deployment of the frequency mixing network system finds the minimum gateway set and the coverage node according to different department requirements of the co-frequency node and the inter-frequency node.
Preferably, the minimum set of gateways and the number of overlay nodes is
And the constraints need to be satisfied:
wherein u represents the number of nodes with the same frequency, w represents the number of nodes with different frequencies, and L*Optimizing the number of gateways for the current layer, and L optimizing the number of gateways for the previous layer.
Preferably, for step S21, NBLOT end nodes are activated in Lora node RA preambles of each department, and the department coverage levels are divided into three levels of normal coverage, enhanced coverage and ultimate coverage, and the corresponding three levels of MCL are 144dB, 154dB, 164 dB.
Preferably, in step S21, after a single node in each department successfully sends a single data packet, the channel is released, and when all the idle nodes in the department have new data packets generated, the queue is not emptied, and the last department node will start the RA again.
In conclusion, compared with the old system, the cloud supply chain system solves the problem of data encryption, protects the privacy of medical logistics, solves the problems of delay of the internet of things and system performance reduction caused by low power consumption of Lora when a large number of nodes are concurrent, and ends up the problem that the throughput of RFID communication cannot be uniformly expressed.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a diagram of the overall system of the present invention;
FIG. 2 is a diagram of a communication interface module model according to the present invention;
FIG. 3 is a flow chart of the operation of the system of the present invention;
fig. 4 is a diagram of the medical material management system of the present invention.
Detailed Description
Embodiments of the present application will be described in detail with reference to the drawings and examples, so that how to implement technical means to solve technical problems and achieve technical effects of the present application can be fully understood and implemented.
Referring to fig. 1-4, the invention provides a hospital material fine management system based on RFID and multi-terminal communication, referring to fig. 1, a hospital builds an NB-LOT internet of things based module, a multi-channel communication node is built by using Lora, a terminal node is started by an ALOHA protocol and initiates a competition channel requirement, a star topology network is built by a Lora network communication architecture inside the hospital, a communication system between an internal logistics terminal and each department is built, an NBLOT system analyzes a backoff mechanism, the number of times of rethreading and the length of a cache area under a single terminal are built, then steady-state distribution throughput of a hospital warehouse is solved, medical product allocation RFID tags are distributed according to the throughput, after staff allocate RFID tags in the medical material management system and hospital logistics materials enter, new responsibility partitions are added, a system manager manages the medical materials by combining with the coding real requirements of the medical materials, storing a secret key, reasonably storing the secret key, embedding the public key in the PDA managed by the special label for the special medical materials, encrypting the ID of the special medical materials and generating an authentication code SID by using the PDA, packaging the special materials, merging the material ID and the encrypted authentication code SID into the RFID label, entering a warehouse, reading the ID and SID of the special medical materials by using a PDA terminal by a department, and then taking out the materials.
In order to solve the problems of data encryption and decryption, in the encryption stage, the ID of special medical materials is read from an RFID label on a package, the ID of the medical materials is encrypted by using an encryption function to generate CID, then the ID of the materials and an authentication code are written into a system memory and then the memory is locked, then authentication is carried out, a department applies for communication through a Lora node, an RFID terminal is used for reading the ID and the authentication code CID of the special medical product from the RFID label, and finally the CID is decrypted by using a decryption function to generate a PID code to be decrypted.
In order to reduce the time for encryption and decryption, the encryption process is divided into two parts, online and offline. In the off-line phase, the encryption operation of the body portion is performed. And in the online stage, the encryption operation is continued by using the intermediate ciphertext and the round key obtained by off-line encryption.
In order to solve the problems of delay of the internet of things and system performance reduction of Lora low power consumption when a large number of nodes are concurrent, gateway deployment of a mixing network system finds a minimum gateway set and a coverage node according to different department requirements of same-frequency nodes and different-frequency nodes, a hospital logistics terminal initializes all nodes, each department Lora node establishes respective RTT mapping tables, the node is in idle state, the hospital logistics terminal sends a node sending request, sends RTS packet to the department target node, carries source ID and destination ID, and sends data packet number, if the department does not receive the expected CTS packet within the prescribed time, the communication is suspended, if both parties receive the CTS packet in response, entering a data formal transceiving stage, continuously updating the transmission delay RTT of a destination end by each Lora node, and loading the delay update of the logistics information into an RTS packet and a CTS packet.
In order to calculate the minimum gateway and solve the gateway midway problem, the constraint conditions are established:
wherein u represents the number of nodes with the same frequency, w represents the number of nodes with different frequencies, and L*Optimizing the number of gateways for the current layer, wherein L is the number of optimized gateways for the previous layer, and at least one of the first round of calculation
One terminal node is covered, leaving
And a terminal node.
Then, continuing to iterate the constraint condition, at least after two rounds
Each terminal node is covered, and after L rounds of operation, the department terminal nodes are not left.
In order to optimize the throughput and efficiency of the system, in the Lora network, each time data transmission is carried out, the terminal controls the transmitting power and the channel model, and then calculates the optimal transmission rate.
In order to solve the problem of packet loss in system transmission, a backoff mechanism is introduced, wherein when NBLOT of two or more department terminals initiates a request, RA processes are started simultaneously, the same resources and the same backoff parameters are selected, channels conflict, NBLOT nodes which conflict restart RA after waiting for a period, backoff waiting time is selected, and contention is restarted and data is transmitted when the channels are idle.
Wherein the channel competition probability is:
and the terminal feeds back the competition probability of the channel to each department for waiting by calculating the competition probability.
Referring to fig. 2, the frequency mixing network system includes an X-type gateway, a Y-type gateway, a common-frequency node and a pilot-frequency node, where the X-type gateway and the common-frequency node and the pilot-frequency node are all connected by an uplink channel or a downlink channel, and the Y-type gateway and the common-frequency node and the pilot-frequency node are also all connected by an uplink channel or a downlink channel, and the X-type gateway and the Y-type gateway are symmetrically disposed in half-duplex; the NBLOT system comprises a plurality of Lora communication modules and a terminal receiving module, PHY of each Lora communication module is linear spread spectrum coding, and an MAC layer of the terminal receiving module is a LoRaWAN protocol management node; the medical material management system comprises record management, label management, tracing management and tracing statistics, wherein the record management comprises medical material allocation of RFID labels, logistics sending and statistics labels.
As used in the specification and in the claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, and a person skilled in the art can solve the technical problem within a certain error range to substantially achieve the technical effect.
It is noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a good or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such good or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a commodity or system that includes the element.
The foregoing description shows and describes several preferred embodiments of the invention, but as aforementioned, it is to be understood that the invention is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A hospital material fine management system based on RFID and multi-terminal communication comprises an NBLOT system, a medical material management system and a mixing network system;
the method is characterized in that: the frequency mixing network system comprises an X-type gateway, a Y-type gateway, a same-frequency node and a different-frequency node, wherein the X-type gateway is connected with the same-frequency node and the different-frequency node through an uplink channel or a downlink channel, the Y-type gateway is connected with the same-frequency node and the different-frequency node through an uplink channel or a downlink channel, and the X-type gateway and the Y-type gateway are symmetrically deployed in a half-duplex manner;
the NBLOT system comprises a plurality of Lora communication modules and a terminal receiving module, the PHY of each Lora communication module is linear spread spectrum coding, and the MAC layer of the terminal receiving module is a LoRaWAN protocol management node;
the medical material management system comprises record management, label management, tracing management and tracing statistics, wherein the record management comprises medical material allocation of RFID labels, logistics sending and statistics labels.
2. The hospital material refinement management system based on RFID and multi-terminal communication as claimed in claim 1, characterized in that: the use frequency points of the uplink channel or the downlink channel of the X-type gateway and the Y-type gateway are different, and the uplink frequency and the downlink frequency are different and opposite.
3. The system for fine management of hospital materials based on RFID and multi-terminal communication according to any one of claims 1-2, characterized in that: the method comprises the following steps:
s1, firstly, a hospital builds an NB-LOT-based Internet of things module, and builds a multi-channel communication node by using Lora, wherein a terminal node is started by an ALOHA protocol and initiates a competition channel requirement, a star topology network is built by a Lora network communication architecture in the hospital, and a communication system between an internal logistics terminal and each department is built;
s2, the NBLOT system analyzes a backoff mechanism, constructs the times of repeated penetration and the length of a cache region under a single terminal, and then solves the steady-state distribution throughput of the hospital warehouse;
s3, distributing the RFID labels for medical product allocation according to the throughput, and allocating the RFID labels for workers in the medical material management system;
s4, adding new responsibility subareas after the hospital logistics materials enter, storing a secret key and reasonably storing a secret key by a system administrator through the management of the medical materials and combining the real coding requirements of the medical materials, and placing the public key in the special label managed PDA for the special medical materials;
s5, using PDA to encrypt the ID of special medical material and generate the identification code SID, packaging the special material, then merging the material ID and the encrypted identification code SID into the RFID label, after entering the warehouse, the department uses PDA terminal to read the ID and SID of special medical material, then taking out the material.
4. The hospital material refinement management system based on RFID and multi-terminal communication as claimed in claim 3, characterized in that: aiming at the step S1, Lora gateway parameters are deployed among each department in the hospital, and the transmitting frequency of each department gateway is at least 17dBm, wherein the edge transmission rate of communication among Lora terminal nodes among each department is as follows:
wherein BW is network bandwidth, xi is uplink transmission rate, SINRlTo transmit the threshold, and Lora is lossy at each terminal communication in the hospital, where the fitted loss model is:
L＝69.55+26.16lgfc-13.82lght-a(hr)+(44.9-6.55lght)lgd，，L0
wherein f iscFor the Lora operating frequency, htTo a launch height, hrFor a second department, L0Is the path loss threshold.
5. The hospital material refinement management system based on RFID and multi-terminal communication as claimed in claim 3, characterized in that: for step S2, the encryption algorithm includes the steps of:
s11, in the encryption stage, reading the ID of the special medical material from the RFID label on the package, encrypting the ID of the medical material by using an encryption function to generate a CID, writing the ID of the material and an authentication code into a system memory, and locking the memory;
s12, then, carrying out authentication, wherein a department applies for communication through a Lora node, and reads the ID and the authentication code CID of the special medical product from the RFID label by using the RFID terminal;
and S13, finally, decrypting the CID by using the decryption function and generating the PID code for decryption.
6. The hospital material refinement management system based on RFID and multi-terminal communication as claimed in claim 3, characterized in that: for step S2, the backoff mechanism of the NBLOT system includes the steps of:
s21, the hospital logistics terminal initializes all nodes, and each department Lora node establishes its respective RTT mapping table to make the nodes in idle state;
s22, the hospital logistics terminal sends a request to send RTS packet to department target node, carrying source ID and destination ID, and sends data packet number, if department does not receive CTS packet expected in a specified time, then communication is stopped;
and S23, if both sides receive the CTS packet, entering a data formal transceiving stage, continuously updating the transmission delay RTT of the destination end by each Lora node, and loading the delay update of the logistics information into the RTS packet and the CTS packet.
7. The hospital material refinement management system based on RFID and multi-terminal communication as claimed in claim 1, characterized in that: and the gateway deployment of the frequency mixing network system finds a minimum gateway set and a coverage node according to different department requirements of the same-frequency node and the different-frequency node.
8. The method of claim 7The hospital material fine management system based on RFID and multi-terminal communication is characterized in that: the minimum gateway set and the number of coverage nodes are
And the constraints need to be satisfied:
wherein u represents the number of nodes with the same frequency, w represents the number of nodes with different frequencies, and L*Optimizing the number of gateways for the current layer, and L optimizing the number of gateways for the previous layer.
9. The hospital material refinement management system based on RFID and multi-terminal communication of claim 6, characterized in that: aiming at the step S21, NBLOT terminal nodes are started in the Lora node RA preamble of each department, the coverage level of each department is divided into three levels of normal coverage, enhanced coverage and limit coverage, and the corresponding MCL of the three levels is 144dB, 154dB and 164 dB.
10. The hospital material refinement management system based on RFID and multi-terminal communication of claim 6, characterized in that: in step S21, after a single node in each department successfully sends a single data packet, the channel is released, and when all the department idle nodes have new data packets generated, the queue is not emptied, and the last department node will start RA again.
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| CN115118527A (en) * | 2022-08-26 | 2022-09-27 | 深圳市成为信息股份有限公司 | Bidirectional authentication method for ultrahigh frequency module and PDA and related equipment |
| CN116502661A (en) * | 2023-06-29 | 2023-07-28 | 河北祥盛农业科技有限公司 | Radio frequency identification verification method, tracing system and slaughter tracing system |
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