Multi-network-port PLC module with VLAN division function

Abstract

The utility model relates to a multi-network-port PLC module with a VLAN division function, end-to-end communication is achieved through a receiver of a communicator and an annunciator of the communicator, due to the fact that the number of reserved cables of an elevator shaft is limited, a plurality of network data such as a network camera, a multimedia screen, a network telephone and a gateway need to be transmitted at the top of a car, and the number of the cables is limited. And different network data are required to be transmitted through the same group of equipment, so that the communicator realizes information transmission by using a communication line. More specifically, a group of communication lines are used for communication between the receiver and the annunciator, so that the number of cables is reduced. Meanwhile, different communication ports can be utilized between the receiver and the annunciator to form different communication blocks, and the communication blocks in communication connection form a broadcast domain. Therefore, the defect that a traditional communication module is difficult to identify is effectively overcome.

Description

Technical Field

[0001] The present application relates to the technical field of electrical equipment, and in particular to a multi-network port PLC module with a VLAN division function. Background Art

[0002] Due to the limited number of cables reserved in the elevator shaft, there are multiple network data that need to be transmitted on the top of the elevator, such as network cameras, multimedia screens, Internet phones, gateways, etc., and different network data are required to be transmitted through the same set of devices. The product needs to support VLAN division to ensure that different data is transmitted to designated departments separately, and different data is not shared between departments.

[0003] Traditional technical solutions require the use of multiple pairs of communication devices, or even multiple pairs of cables. With the continuous increase of network hosts, there will be more and more broadcasts in the switching network, which greatly increases the probability of broadcast storms in the network. Once a broadcast storm occurs, the entire network system will be paralyzed, making troubleshooting difficult. Therefore, it is necessary to propose a multi-network port PLC module with VLAN division function to address the defects of traditional communication modules that are difficult to identify. Utility Model Content

[0004] Therefore, it is necessary to propose a multi-network port PLC module with VLAN division function to address the defects of traditional communication modules that are difficult to identify.

[0005] This application proposes a multi-network port PLC module with VLAN division function, including

[0006] A communicator, comprising a receiver and a signaler; the signaler performs one or more of signal output and signal reception tasks, and the receiver performs one or more of signal output and signal reception tasks;

[0007] A communication line is communicatively connected to the receiver, and the communication line is communicatively connected to the signaler; so that different communication blocks can be formed between the receiver and the signaler using different communication ports, and the communicatively connected communication blocks form a broadcast domain.

[0008] The present application relates to a multi-network port PLC module with VLAN division function, which realizes end-to-end communication through the receiver of the communicator and the signaler of the communicator. Since the number of cables reserved in the elevator shaft is limited, there are network cameras, multimedia screens, Internet phones, gateways and other network data on the top of the car that need to be transmitted, and different network data are required to be transmitted through the same set of equipment, so the communicator uses communication lines to realize information transmission. More specifically, the present application uses a group of communication lines for communication between the receiver and the signaler, saving the number of cables. At the same time, different communication ports can be used between the receiver and the signaler to form different communication blocks, and the communication blocks of the communication connection form a broadcast domain. This effectively solves the defect that traditional communication modules are difficult to identify. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 A schematic diagram of the structure of a multi-network port PLC module with VLAN division function provided in one embodiment of the present application.

[0010] Figure 2 A schematic diagram of the structure of a multi-network port PLC module with VLAN division function provided in one embodiment of the present application.

[0011] Figure 3 A schematic diagram of the structure of a multi-network port PLC module with VLAN division function provided in one embodiment of the present application.

[0012] Reference numerals:

[0013] 100-communicator; 110-receiver; 111-power module; 112-signal processing module;

[0014] 113 - communication module; 114 - first communication port; 120 - signal device; 121 - second communication port;

[0015] 122-broadcast domain; 200-communication line; 210-twisted pair; 222-first core; 223-second core. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0017] The present application provides a multi-network port PLC module with VLAN division function.

[0018] like Figure 1 As shown, in one embodiment of the present application, a multi-network port PLC module with VLAN division function includes a communicator 100 and a communication line 200.

[0019] The communicator 100 includes a receiver 110 and a signal generator 120. The signal generator 120 performs one or more tasks of signal output and signal reception, and the receiver 110 performs one or more tasks of signal output and signal reception.

[0020] The communication line 200 is communicatively connected to the receiver 110 , and the communication line 200 is communicatively connected to the signaler 120 , so that the receiver 110 and the signaler 120 can form different communication blocks using different communication ports, and the communicatively connected communication blocks form a broadcast domain 122 .

[0021] Specifically, end-to-end communication is achieved through the receiver 110 of the communicator 100 and the signaler 120 of the communicator 100. Different communication ports can be used to form different communication blocks between the receiver 110 and the signaler 120, and the communication blocks connected by communication form a broadcast domain 122.

[0022] The present application relates to a multi-network port PLC module with VLAN division function, which realizes end-to-end communication through the receiver 110 of the communicator 100 and the signaler 120 of the communicator 100. Since the number of cables reserved in the elevator shaft is limited, there are network cameras, multimedia screens, Internet phones, gateways and other network data on the top of the car that need to be transmitted, and different network data are required to be transmitted through the same set of equipment, so the communicator 100 uses a communication line 200 to realize information transmission. More specifically, the present application uses a group of communication lines 200 for communication between the receiver 110 and the signaler 120, saving the number of cables. At the same time, different communication ports can be used between the receiver 110 and the signaler 120 to form different communication blocks, and the communication blocks of the communication connection form a broadcast domain 122. This effectively solves the defect that the traditional communication module 113 is difficult to identify.

[0023] The multi-network port PLC module with VLAN division function based on communication line 200 has high reliability and can effectively reduce the communication channel problems caused by the increasing number of network hosts. There will be more and more broadcasts in the switching network. Communication line 200 can reduce the probability of broadcast storms in the network, which reduces the probability of paralysis of the entire network system.

[0024] The receiver 110 and the signal transmitter 120 are powered by a DC12V power supply, and the power chip outputs voltage to power each chip. When the Flash chip 1 works, the PLC system runs according to the set program. The device will send a handshake signal. After the other device receives the signal, it will send a signal notification. The two devices begin to establish a communication connection. After the connection is successful, network data transmission can be performed. The program is set in the Flash chip 2, and the network port is divided into 3 VLANs. VLAN1 has 1 network port LAN1, VLAN has 3 network ports LAN234, and VLAN has 2 network ports LAN56. At this time, the transmitter will only forward it to other ports belonging to the same VLAN, that is, the transmitter sends data from VLAN1, and only VLAN1 can receive the data at the receiving end. The network signal of the transmitter is transmitted to the receiving end through the communication line 200, and the network data is transmitted to the corresponding VLAN port according to the program setting of the Flash chip 2.

[0025] like Figure 2 As shown, in one embodiment of the present application, the receiver 110 is provided with a plurality of first communication ports 114. One or more of the first communication ports 114 of the same receiver 110 are a communication block. The signaler 120 is provided with a plurality of second communication ports 121. One or more of the second communication ports 121 of the same signaler 120 are a communication block.

[0026] The communication blocks in which the receiver 110 and the signaler 120 are communicatively connected are the same broadcast domain 122 .

[0027] The different broadcast domains 122 have different marks. The same broadcast domains 122 have the same mark.

[0028] The present embodiment involves the communication block of the receiver 110 and the communication block of the signal transmitter 120. VLAN is a virtual local area network, which is an emerging technology that realizes virtual workgroups by logically rather than physically dividing the devices in the local area network into network segments, namely communication blocks. VLAN technology allows network administrators to logically connect the communication blocks of a physical LAN into a broadcast domain 122. Each VLAN contains a group of computer workstations with the same needs and has the same properties as the physically formed LAN. However, since it is divided logically rather than physically, the workstations in the same VLAN do not need to be placed in the same physical space. Broadcast and unicast traffic within a VLAN will not be forwarded to other VLANs, which can help control traffic, simplify network management, and improve network security.

[0029] like Figure 3As shown, in one embodiment of the present application, the receiver 110 and the signal device 120 have the same structure. The receiver 110 includes a power module 111, a signal processing module 112 and a communication module 113. The power module 111 is externally connected to a power source. The power module 111 is electrically connected to the signal processing module 112. The signal processing module 112 is communicatively connected to the communication module 113. The communication module 113 is externally connected to a communication port of the signal device 120.

[0030] Specifically, the communicator 100 composed of the receiver 110 and the signaler 120 generally adopts orthogonal frequency division multiplexing technology, namely OFDM, based on the communication line 200. The orthogonal frequency division multiplexing technology divides the channel into a number of orthogonal sub-channels, and performs narrowband modulation and transmission on each sub-channel, thereby reducing mutual interference between sub-channels and improving spectrum utilization. The signal bandwidth on each sub-channel is smaller than the bandwidth of the channel, so the frequency selective fading on each sub-channel is flat, which greatly eliminates inter-symbol interference.

[0031] OFDM allows the frequencies of each carrier to overlap with each other, and adopts modulation based on carrier frequency orthogonality. Since there are no spectrum components of other carriers at the center frequency of each carrier, the orthogonality of each carrier can be achieved.

[0032] The principle of fast discrete Fourier transform generation and reception of OFDM signals is that at the transmitter, the binary data sequence with an input rate of Rb is first converted from serial to parallel, and the serial data is converted into N parallel data and distributed to N different sub-channels. At this time, the sub-channel signal transmission rate is Rb / N. The N-channel data is encoded and mapped into N complex digital symbols Xk. Then the encoded and mapped output signal is sent to a fast Fourier inverse transform module, which transforms the N complex digital symbols Xk in the frequency domain into 2N real number sample values ​​Xk in the time domain. Thus, the original data is processed by OFDM according to the frequency domain data, and the calculated transformed sample value is added to the sample value by a cyclic prefix to form a cyclically extended OFDM information code. This code is converted from parallel to serial here, and then the baseband signal is output through D / A and low-pass filter in a serial manner, and finally the OFDM signal is output through up-conversion.

[0033] Frequency modulation is a modulation method that changes the instantaneous frequency of the carrier according to the changing rules of the signal to be transmitted. In order to achieve long-distance or short-distance transmission, the product program is modified to adjust the operating frequency of the product. Long-distance transmission works at high frequency, and short-distance transmission works at low frequency.

[0034] More specifically, based on orthogonal frequency division multiplexing technology, VLAN, or virtual local area network, is an emerging technology that realizes virtual workgroups by logically rather than physically dividing the devices in the local area network into segments.

[0035] VLAN technology allows network administrators to logically divide a physical LAN into different broadcast domains 122. Each VLAN contains a group of computer workstations with the same requirements and has the same properties as the physically formed LAN. However, since it is divided logically rather than physically, the workstations in the same VLAN do not need to be placed in the same physical space. Broadcast and unicast traffic within a VLAN will not be forwarded to other VLANs, which can help control traffic, simplify network management, and improve network security.

[0036] The receiver 110 includes a power module 111, a signal processing module 112 and a communication module 113. The signal transmitter 120 is powered by a DC12V power supply, firstly through a lightning protection circuit (normally inactive), an overcurrent protection circuit, a rectifier circuit, a power filter circuit, an overvoltage and polarity reverse protection circuit, and a power chip, and then the power chip outputs a voltage to power each chip. When the Flash chip 1 works, the PLC system runs according to the set program, and the device sends a handshake signal. When the other device receives the signal, it sends a signal notification, and the two devices begin to establish a communication connection. After the connection is successful, network data transmission can be performed.

[0037] The program is set in Flash chip 2 to divide the network ports into three VLANs, VLAN1 has one network port LAN1, VLAN has three network ports LAN234, and VLAN has two network ports LAN56. At this time, the signal transmitter 120 will only forward it to other ports belonging to the same VLAN, that is, the transmitter sends data from VLAN1, and the receiver 110 can only receive data from VLAN1.

[0038] The network signal of the signal transmitter 120 passes through the RJ45 network port, is electrically isolated by the network transformer, and then enters the Switch chip. According to the program set by the Flash chip 2, it is transmitted to the main chip. After the data is processed, it is amplified by the operational amplifier chip, and transmitted to the receiving end through two core wires. The received signal is restored by the operational amplifier chip, and the analog signal is demodulated into a digital signal by the main chip. It is then processed by the main chip and transmitted to the network port chip. According to the program setting of the Flash chip 2, the network data is transmitted to the corresponding VLAN port.

[0039] This embodiment relates to a communicator 100. The communicator 100 greatly reduces the probability of broadcast storms in the network, and at the same time, when the entire network system is paralyzed, the difficulty of troubleshooting is small. Therefore, this embodiment solves the defect that the traditional communication module 113 is difficult to identify.

[0040] The technical features of the above-described embodiments may be arbitrarily combined, and the execution order of the method steps is not limited. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0041] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the present application. It should be noted that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A multi-network port PLC module with VLAN division function, characterized in that: include: Communicator, including receiver and signaler; The signal transmitter performs one or more of signal output and signal reception tasks, and the receiver performs one or more of signal output and signal reception tasks; A communication line is communicatively connected to the receiver, and the communication line is communicatively connected to the signaler, so that different communication blocks are formed between the receiver and the signaler using different communication ports, and the communicatively connected communication blocks form a broadcast domain.

2. The multi-network port PLC module with VLAN division function according to claim 1, characterized in that: The communication line includes a first core and a second core; One end of the first wire core abuts against the receiver, and the other end of the first wire core abuts against the signaler; One end of the second wire core abuts against the receiver, and the other end of the second wire core abuts against the signaler.

3. The multi-network port PLC module with VLAN division function according to claim 1, characterized in that: The receiver is provided with a plurality of first communication ports; One or more of the first communication ports of the same receiver are a communication block; The annunciator is provided with a plurality of second communication ports; One or more of the second communication ports of the same annunciator constitute a communication block.

4. The multi-network port PLC module with VLAN division function according to claim 3 is characterized in that: The communication blocks in which the receiver and the signaler are communicatively connected are in the same broadcast domain; one receiver is communicatively connected to one or more signalers; and one signaler is communicatively connected to one or more receivers.

5. The multi-network port PLC module with VLAN division function according to claim 4, characterized in that: The same broadcast domains have the same logo.

6. The multi-network port PLC module with VLAN division function according to claim 5, characterized in that: The receiver and the signaler have the same structure; The receiver includes a power module, a signal processing module and a communication module; The power module is externally connected to a power source; The power supply module is electrically connected to the signal processing module; The signal processing module is communicatively connected with the communication module; The communication module is externally connected to the communication port of the annunciator.

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