CN203659205U - Data transmission device - Google Patents
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- CN203659205U CN203659205U CN201320664632.9U CN201320664632U CN203659205U CN 203659205 U CN203659205 U CN 203659205U CN 201320664632 U CN201320664632 U CN 201320664632U CN 203659205 U CN203659205 U CN 203659205U
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Abstract
The utility model discloses a data transmission device. The data transmission device comprises a DTU (data transfer unit) protocol processing module, multiple groups of ONU (optical network unit) modules and an exchanging module, wherein the DTU protocol processing module is used for processing a network communication protocol and an electric power communication protocol, the ONU modules are used for data transmission, and the exchanging module can finish exchanging data transmission circuits according to the command sent by the DTU protocol processing module; the ONU modules comprise connected ONU units and photovoltaic conversion units, one side of the DTU protocol processing module is connected with the ONU units in the multiple groups of ONU modules, and the other end of the DTU protocol processing module is connected with client ends; one side of the exchanging module is respectively connected with the ONU units in the multiple groups of ONU modules, and the other side of the exchanging module is connected with the client ends; and the photovoltaic conversion units are connected with OLT (optical line terminal) equipment, and the DTU protocol processing module is connected with the exchanging module. The data transmission device provided by the utility model has the advantages that the switchover of multichannel data transmission circuits is realized through the multiple groups of ONU modules, and the communicative safety and reliability are improved.
Description
Technical field
The utility model relates to communication technique field, particularly a kind of data transmission device.
Background technology
DTU(Data Transfer Unit, data transmission unit) be generally arranged on conventional switching station (station), outdoor small-sized switching station, ring main unit, Small Substation, box-type substation etc. and locate, complete collection and the calculating of the data such as the position signalling, voltage, electric current, active power, reactive power, power factor, electric flux of switching devices, split to close and carry out breaking-closing operating, realize Fault Identification, isolation and restoring electricity to non-fault section to feeder switch.
That use is more at present is GPRS DTU, in fact GPRS DTU is had to clearer and more definite agreement at home: GPRS DTU is specifically designed to the GPRS wireless device that serial data is transmitted by GPRS network.It has four Core Features: inner integrated ICP/IP protocol stack; Serial data bi-directional conversion function is provided; Support automatic heartbeat, keep permanent online; Support parameter configuration, persistence.
Wherein, the GPRS DTU course of work is described below:
After GPRS DTU powers on, first read the running parameter preserved in inner FLASH (comprise GPRS dialing parameters, serial ports baud rate, the IP of data center address etc., configures in advance).
GPRS DTU logs in GSM network, then carries out GPRS PPP dialing.After dial-up success, GPRS DTU will obtain an implicit IP address being distributed by movable random (being generally 10.X.X.X).That is to say, GPRS DTU is in mobile Intranet, and its IP address of internal network is normally unfixed, changes along with each dialing.
GPRS DTU initiatively initiates the communication connection with data center, and keeps communication connection to exist always.Because GPRS DTU is in mobile Intranet, and IP address is unfixing.Therefore, can only be by initiatively connection data center of GPRS DTU, and can not initiatively connect GPRS DTU by data center.This just requires data center to possess fixing public network IP address or fixing domain name.The public network IP address of data center or fixing domain name as Parameter storage in GPRS DTU, once so that GPRS DTU powers on dial-up success, just can initiatively be connected to data center.
For DTU, as long as set up and the two-way communication of data center, completing user serial data is just relative simple with the conversion of GPRS network packet.Once receive user's serial data, DTU is just encapsulated in serial data in a TCP/UDP bag immediately, sends to data center.Otherwise, in the time that DTU receives the TCP/UDP bag that data center sends, therefrom take out data content, send to subscriber equipment by serial ports immediately.
GPRS DTU message transmission rate is higher, but has the deficiency of the following aspects: 1) can not transmit for a long time a large amount of data; 2) in place such as basement, the inside, building etc. of some poor signals, communication efficiency can not fully ensure, there will be the situation of disconnecting; 3) operation cost of GPRS is higher.
Utility model content
The purpose of this utility model is open a kind of data transmission device, to solve the not good problem of DTU communication effect, can improve stability and the reliability of communication.
A kind of data transmission device of the present utility model, is characterized in that, comprising:
The instruction sending for the treatment of the DTU protocol process module of network communication protocol and power communication agreement, for many groups ONU module of data transmission with according to DTU protocol process module completes the Switching Module of data transmission link exchange, and ONU module comprises connected ONU unit and photoelectric conversion unit; DTU protocol process module one side is connected with the ONU unit in many groups ONU module, and opposite side is connected with client; Switching Module one side is connected with the ONU unit in many groups ONU module respectively, and opposite side is connected with client; Photoelectric conversion unit is connected with outside OLT equipment; DTU protocol process module is connected with Switching Module.
Preferably, data transmission device also comprises: connector modules;
DTU protocol process module is connected with client by connector modules with Switching Module.
Preferably, data transmission device also comprises: power transfer module;
Power transfer module is connected with client, and the supply voltage that client is provided is converted to the required operating voltage of device internal components.
Preferably, the supply voltage that power transfer module provides client is converted to 1.0V, 2.5V and 3.3V operating voltage.
Preferably, the communication interface between DTU protocol process module and connector modules comprises: GPIO interface, UART interface and I2C interface.
Preferably, photoelectric conversion unit is connected with outside OLT equipment by SC interface.
A kind of data transmission device that the utility model provides, there are many group ONU modules, in the time that one group of ONU module for data transmission breaks down, DTU protocol process module control Switching Module, by the circuit switching of data transmission to another road normal ONU module, thereby ensure that communication do not interrupt, can effectively avoid communication to disconnect because of ONU module failure.By adopting " handing in hand " protected mode, can realize the switching of two paths of data transmission line, and then ensure that the business of client is unaffected, improve the safety and reliability of system.This data transmission device can change traditional DTU completes the communication modes of communication by GPRS, thereby adopts optical-fibre communications to avoid the bad problem of communication signal, can ensure communication effect.
Brief description of the drawings
Fig. 1 is the first structural representation of a kind of data transmission device of the utility model;
Fig. 2 is the second structural representation of a kind of data transmission device of the utility model;
Fig. 3 is the physical topology figure of the utility model data transmission;
Fig. 4 is that the utility model adopts protection hand in hand to switch the physical topology figure of networking mode.
Mark the following drawings mark thereon by reference to the accompanying drawings:
11-DTU protocol process module, 12-the one ONU module, 13-the 2nd ONU module, 14-Switching Module, 15-power transfer module, 16-connector modules;
121-the one ONU unit, 122-the first photoelectric conversion unit, 131-the 2nd ONU unit, 132-the second photoelectric conversion unit.
Embodiment
Below in conjunction with accompanying drawing, several embodiments of the present utility model are described in detail, but are to be understood that protection domain of the present utility model is not subject to the restriction of embodiment.
In the utility model embodiment, adopt optical fiber as communication media, utilize EPON(Ethernet Passive Optical Network, based on the EPON of Ethernet) complete data transmission.EPON is a kind of novel Optical Access Network technology, it adopts point-to-multipoint structure, passive fiber transmission, multiple business is provided on Ethernet, light signal is at OLT(Optical Line Terminal, optical line terminal) and ONU(Optical Network Unit, optical network unit) between transmission.It has adopted PON(Passive Optical Network in Physical layer, EPON) technology, use Ethernet protocol at link layer, utilize the topological structure of PON to realize the access of Ethernet, therefore, it combines the advantage of PON technology and ethernet technology: low cost; High bandwidth; Extendability is strong, flexibly service reconfiguration fast; Compatibility with existing Ethernet; Management etc. easily.
A kind of data transmission device that the utility model embodiment provides, comprise: the instruction sending for the treatment of the DTU protocol process module of network communication protocol and power communication agreement, for multiple ONU modules of data transmission with according to DTU protocol process module completes the Switching Module of data transmission exchange, wherein, ONU module comprises connected ONU unit and photoelectric conversion unit.As shown in Figure 1, the present embodiment is taking two ONU modules as example, this data transmission device comprises: DTU protocol process module 11, an ONU module 12, the 2nd ONU module 13, Switching Module 14, wherein, the one ONU module 12 comprises that a connected ONU unit 121 and the first photoelectric conversion unit 122, the two ONU modules 13 comprise the 2nd connected ONU unit 131 and the second photoelectric conversion unit 132.
DTU protocol process module 11 1 sides are connected with the 2nd ONU unit 131 in the 2nd ONU module 13 with the ONU unit 121 in an ONU module 12, and opposite side is connected with client; Switching Module 14 1 sides are connected with the 2nd ONU unit 131 in the 2nd ONU module 13 with the ONU unit 121 in an ONU module 12 respectively, and opposite side is connected with client; The first photoelectric conversion unit 122 is connected with outside OLT equipment with the second photoelectric conversion unit 132; DTU protocol process module 11 is connected with Switching Module 14.
Wherein, photoelectric conversion unit is connected with outside OLT equipment by SC interface, and the plug of SC interface is easy to operate, insertion loss fluctuation is little and compressive strength is high.The EPON communication system of the ONU module being formed by ONU unit and photoelectric conversion unit and the external common complete of OLT equipment.
In the time of normal operating conditions, one group of ONU module in a usage data transmitting device is carried out data transmission, and another group ONU module is in idle condition.For example, a current ONU module 12 is for data transmission, and the 2nd ONU module 13 is in idle condition; In the time of downlink data transmission, OLT equipment sends light signal with the form of broadcast to an ONU module 12, the first photoelectric conversion unit 122 is connected with outside OLT equipment by SC interface, the first photoelectric conversion unit 122 receives this light signal, and light signal is converted to electric signal, send to ONU unit 121, the one ONU unit 121 selectivity to receive this electric signal and by Switching Module 14 and DTU protocol process module 11, electric signal is sent to client simultaneously; In the time of transmitting uplink data, the data that client sends send to an ONU module 12 by DTU protocol process module 11 and Switching Module 14, utilize the first photoelectric conversion unit 122 that these data are converted to light signal, and this light signal is sent to outside OLT equipment, thereby complete bidirectional data transfers process.In the time that an ONU module 12 breaks down, data transmission device is switched to data transmission link in the 2nd ONU module 13, utilizes the 2nd ONU module 13 can complete equally above-mentioned data transmission procedure.
DTU protocol process module 11 and Switching Module 14 complete the function that transmission line switches jointly.Wherein, DTU protocol process module 11 comprises an arm processor and accessory circuit thereof, be mainly used in the processing of network communication protocol and power communication agreement, the network of wherein supporting comprises that TCP client(supports 2 connections), the power communication agreement of support comprises DL/T634.5101-2002, DL/T634.5104-2002, DNP3, SC1801 and MODBUS.Simultaneously, DTU protocol process module 11 is also for being configured Switching Module, in the time detecting that wherein one group of ONU module breaks down, DTU protocol process module 11 sends exchange instruction to Switching Module 14, instruction Switching Module 14 carries out data transmission link exchange, thereby data transmission link is switched in another group ONU module.DTU protocol process module 11 is assigned one dynamically or static IP, and each group ONU module all has unique MAC Address, DTU protocol process module 11 is by controlling Switching Module 14, can control the conversion of mapping relations between local IP and many group ONU module MAC Address, thereby realize the switching of the non-master-slave mode of single IP.
A kind of data transmission device that the utility model embodiment provides, there are many group ONU modules, in the time that one group of ONU module for data transmission breaks down, DTU protocol process module control Switching Module, by the circuit switching of data transmission to another road normal ONU module, thereby ensure that communication do not interrupt, can effectively avoid communication to disconnect because of ONU module failure.By adopting " handing in hand " protected mode, can realize the switching of two paths of data transmission line, and then ensure that the business of client is unaffected, improve the safety and reliability of system.This data transmission device can change traditional DTU completes the communication modes of communication by GPRS, thereby adopts optical-fibre communications to avoid the bad problem of communication signal, can ensure communication effect.
Preferably, shown in Figure 2, data transmission device also comprises: power transfer module 15 and connector modules 16.Wherein, power transfer module 15 is connected with client, and the supply voltage that client is provided is converted to the required operating voltage of device internal components, is the power supply of data transmission device internal components.Concrete, the voltage transitions that power transfer module 15 provides client is 1.0V, 2.5V and 3.3V operating voltage, the power supplies such as wherein 1.0V voltage is supplied with the core chip of ONU module etc., and 2.5V voltage is supplied with the built-in IO interface of ONU module etc., and 3.3V voltage is photoelectric conversion module.Utilize the power supply that client provides to power for data transmission device, do not need external extra power module, simplify apparatus structure, can reduce costs simultaneously.
DTU protocol process module 11 is connected with client by connector modules 16 with Switching Module 14.Concrete, connector modules 16 comprises network interface signaling interface, GPIO signaling interface and multichannel UART interface and I2C signaling interface.Wherein the interface between DTU protocol process module 11 and connector modules 16 comprises GPIO signaling interface, UART interface and I2C signaling interface, utilizes many interfaces can make DTU protocol process module 11 realize communication with client flexibly.Power transfer module 15 also can be connected with client by connector modules 16.
DTU protocol process module 11 grades are connected with client by connector modules 16, can reduce the plug number of times of DTU protocol process module 11 interfaces such as grade, thereby effectively protect its interface; Simultaneously by interface concentration on connector modules 16, convenient carry out wiring with client and be connected, can improve wiring efficiency.
More than describe the structure of data transmission device in detail, below taking electric system as example, the data transmission device that introduction has two groups of ONU modules utilizes EPON to complete the process of data transmission.
Concrete, as shown in Figure 3, OLT is optical line terminal to the physical topology figure of data transmission, and OLT is generally arranged on transformer station inside, and one of them PON mouth is connected to an ONU module of data transmission device; DTU client is generally arranged in conventional switching station (station), outdoor small-sized switching station, ring main unit, Small Substation or box-type substation.OLT completes the transmission of N circuit-switched data by N data transmission device and N DTU client, is connected by Ethernet interface or RS mouth as the DTU client of electric power terminal with data transmission device.
Wherein, the principle of every circuit-switched data transmission is identical, is illustrated below as an example of first via data transmission example.Shown in Figure 3, data transmission device 1 has two groups of ONU modules, and every group of ONU module has respectively unique MAC Address, is respectively MAC11 and MAC12, and MAC11 and MAC12 do not have principal and subordinate's order, uses same IP address when two MAC work.In the time that MAC11 breaks down, it is upper that data transmission channel is switched to MAC12 by data transmission device 1, even if now MAC11 recovers normal, also data transmission channel can be switched on MAC11; When only normal in MAC11 recovery and MAC12 breaks down, just data transmission channel is switched on MAC11.By adopting " handing in hand " protected mode, can realize the switching of two paths of data transmission line, and then ensure that the business of electric system client is unaffected, improve the safety and reliability of electric system.
Preferably, shown in Figure 4, adopt two OLT to protect and switch networking mode hand in hand, can protect the inefficacy of ONU module and OLT.
Under this networking mode, in the time that a MAC of data transmission device breaks down, data transmission channel can be switched to another MAC upper, thereby ensure that the business of electric power terminal is unaffected, can improve stability.Meanwhile, adopt EPON technology, in light transmission way, do not need power supply, there is no electronic unit, easily lay, can save long-time maintenance cost and handling cost.
A kind of data transmission device that the utility model embodiment provides, there are many group ONU modules, in the time that one group of ONU module for data transmission breaks down, DTU protocol process module control Switching Module, by the circuit switching of data transmission to another road normal ONU module, thereby ensure that communication do not interrupt, can effectively avoid communication to disconnect because of ONU module failure.
A kind of data transmission device that the utility model embodiment provides, by adopting " handing in hand " protected mode, can realize the switching of two paths of data transmission line, and then ensures that the business of client is unaffected, improves the safety and reliability of system.Meanwhile, optical fiber communication has the good characteristics such as capacity is large, speed is high, long transmission distance, strong interference immunity, good insulation preformance, is applicable to the high voltage such as electric substation, high-tension line strong electromagnetic interference environment, and can increases bandwidth and the network throughput of system.Along with the continuous decline of optical fiber cost, also reduce the expense of opening and the maintenance cost of whole system.
Disclosed is above only several specific embodiment of the present utility model, and still, the utility model is not limited thereto, and the changes that any person skilled in the art can think of all should fall into protection domain of the present utility model.
Claims (6)
1. a data transmission device, is characterized in that, comprising:
The instruction sending for the treatment of the DTU protocol process module of network communication protocol and power communication agreement, for many groups ONU module of data transmission with according to described DTU protocol process module completes the Switching Module of data transmission link exchange, and described ONU module comprises connected ONU unit and photoelectric conversion unit;
Described DTU protocol process module one side is connected with the ONU unit in many groups of described ONU modules, and opposite side is connected with client; Described Switching Module one side is connected with the ONU unit in many groups of described ONU modules respectively, and opposite side is connected with client; Described photoelectric conversion unit is connected with outside OLT equipment; Described DTU protocol process module is connected with described Switching Module.
2. data transmission device according to claim 1, is characterized in that, also comprises: connector modules;
Described DTU protocol process module is connected with client by described connector modules with described Switching Module.
3. data transmission device according to claim 1, is characterized in that, also comprises: power transfer module;
Described power transfer module is connected with client, and the supply voltage that client is provided is converted to the required operating voltage of described device internal components.
4. data transmission device according to claim 3, is characterized in that, the supply voltage that described power transfer module provides client is converted to 1.0V, 2.5V and 3.3V operating voltage.
5. data transmission device according to claim 1, is characterized in that, the communication interface between described DTU protocol process module and described connector modules comprises: GPIO interface, UART interface and I2C interface.
6. data transmission device according to claim 1, is characterized in that, described photoelectric conversion unit is connected with outside OLT equipment by SC interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201320664632.9U CN203659205U (en) | 2013-10-25 | 2013-10-25 | Data transmission device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320664632.9U CN203659205U (en) | 2013-10-25 | 2013-10-25 | Data transmission device |
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| CN203659205U true CN203659205U (en) | 2014-06-18 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105813354A (en) * | 2016-01-22 | 2016-07-27 | 中国民用航空总局第二研究所 | Navigation-assistant lamp controller based on Ethernet passive optical network technology |
| CN110933153A (en) * | 2019-11-22 | 2020-03-27 | 广西建工集团智慧制造有限公司 | Building site all-purpose Internet of things equipment |
-
2013
- 2013-10-25 CN CN201320664632.9U patent/CN203659205U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105813354A (en) * | 2016-01-22 | 2016-07-27 | 中国民用航空总局第二研究所 | Navigation-assistant lamp controller based on Ethernet passive optical network technology |
| CN110933153A (en) * | 2019-11-22 | 2020-03-27 | 广西建工集团智慧制造有限公司 | Building site all-purpose Internet of things equipment |
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Granted publication date: 20140618 |