CN206349994U - A kind of power distribution communication net blending agent gateway and ring-type communication network - Google Patents

Abstract

A power distribution communication network hybrid media gateway and a ring communication network relate to a power distribution communication network hybrid media gateway and a ring communication network that uses the hybrid media gateway to switch to power line carrier communication when an OLT device fails. The utility model comprises: an even number of optical fiber interfaces, a conversion unit connected to the optical fiber interface, a judging/switching unit connected to a plurality of conversion units, and a carrier unit; the even number of optical fiber interfaces and the connected conversion units constitute a default transmission channel and A redundant transmission channel; the optical fiber interface is connected to the optical network unit ONU inside the regional optical fiber network through an optical fiber line; the conversion unit is connected to the optical fiber interface to receive the optical signal transmitted by the optical network unit ONU. The utility model can solve the problem that the optical fiber link cannot form a ring communication network due to field conditions and examination and approval restrictions, and improves the reliability and effectiveness of the power distribution communication network.

Description

A hybrid medium gateway and ring communication network for power distribution communication network

technical field

The utility model relates to a hybrid medium gateway of a power distribution communication network and a ring communication network which uses the mixed medium gateway to switch to power line carrier communication when an OLT device fails. Involves patent classification number H04 Electric Communication Technology H04B Transmission H04B3/00 Wired Transmission System H04B3/54 System for Transmission Through Power Distribution Lines.

Background technique

With the continuous maturity of EPON technology, EPON networking technology is mostly used in power distribution communication system networking. EPON technology adopts a point-to-multipoint passive distribution optical fiber network structure to connect the local end and the user end. Its international standard IEEE802.3ah was released in 2004, and its solutions and corresponding products are becoming more and more mature, and have basically adapted to the power distribution communication network. The reliability requirements of the access layer will become the networking method of the mainstream power distribution communication access network in the future. However, EPON protection and its networking technology are still in their infancy. Due to the special needs of distribution network reliability, in order to improve network reliability, EPON redundant protection networking has become the future development trend of distribution communication network. At present, EPON redundant protection network technology has been used in new projects of power distribution communication network. The communication network structure used in the actual engineering of the distribution communication network access layer EPON protection network includes: single power supply redundant protection tree network, full chain protection hand in hand network, full link protection dual power supply double T network and ring Protection net. The above-mentioned redundant networking protection technologies all monitor the signal in the optical cable in real time, and quickly switch the working optical path to the standby optical fiber channel when a serious failure occurs. The premise of its application is that there is a standby optical fiber route.

In practical applications, optical cables cannot be laid in some places due to urban construction approval reasons. Or due to ground subsidence and other reasons, the pipeline in the reserved communication pipeline area is blocked, so that the optical fiber cannot reach it. Or the existing optical fiber is mechanically broken due to external force and other influences, and communication support cannot be continued. All of the above problems will result in the inability to provide backup optical fiber routing or even the inability to provide optical fiber routing, resulting in the inability to form optical fiber communication protection and even cause the site to fail to solve the problem of power distribution communication, and islanding is common. These problems limit the development of distribution network communication services and the construction of smart grids.

Utility model content

Aiming at the above problems, the utility model develops a hybrid medium gateway for power distribution communication network, which includes.

An even number of optical fiber interfaces, a conversion unit connected to the optical fiber interfaces, a judging/switching unit connected to multiple conversion units, and a carrier unit.

The even-numbered optical fiber interfaces and the connected conversion units constitute a default transmission channel and a redundant transmission channel.

The optical fiber interface is connected to the optical network unit ONU inside the regional optical fiber network through optical fiber lines.

The conversion unit is connected to the optical fiber interface, receives the optical signal transmitted by the optical network unit ONU, and converts the optical signal into an electrical signal. Convert the carrier signal/electrical signal transmitted by other regional optical fiber network into optical signal.

As a preferred embodiment, the optical fiber interface adopts a standard optical fiber interface. The judging/switching unit is connected to at least two converting units through a common electrical interface.

As a preferred implementation manner, a judging module for judging the temperature parameters of the equipment is included.

As a preferred implementation manner, the judgment switching unit isolates signals transmitted by an even number of conversion units. At the same time, hardware encryption is performed on isolated signals. Different digital signal labels are added on the basis of the original signal to ensure that the multi-channel signal transmission does not interfere with each other.

A mixed media communication network is characterized by comprising.

Multiple regional optical communication networks interconnected by power lines.

The regional optical communication network includes: an optical line terminal (OLT) and a plurality of optical network units (ONUs) connected to the OLT through optical fibers.

An optical splitter is provided on the optical fiber connecting each optical network unit ONU to the OLT, and the optical fiber drawn from the optical splitter is connected to the optical fiber interface of the network hybrid media gateway.

Furthermore, the ONU is also directly connected to the mixed-media gateway in the common regional optical communication network through optical fiber, as a redundant line. When there is a problem with the OLT in the area and the optical fiber line connecting the ONU and the OLT, the optical signal of the ONU is transmitted to the mixed media gateway through the redundant line, and then transmitted to the OLT2 through the power carrier signal to complete the subsequent transmission of the signal.

By adopting the above-mentioned technical scheme, the hybrid medium gateway and the ring communication network of the power distribution communication network disclosed by the utility model have the following advantages: it can provide an “isolated” power distribution terminal limited by site conditions and approval permits. Fast implementation of power distribution communication. It can solve the problem that the optical fiber link cannot form a ring communication network due to site conditions and approval restrictions, and improve the reliability and effectiveness of the power distribution communication network. It can provide a distribution communication network construction scheme with high reliability, fast implementation and good economy, which has important theoretical and practical significance for the construction of distribution communication network. It will speed up the construction of intelligent distribution network, provide a more complete and safe power supply environment for thousands of households, and have very important social benefits.

Description of drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description The drawings are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a block diagram of the hybrid media gateway of the present invention.

Fig. 2 is a schematic diagram of a ring network based on a hybrid media gateway of the present invention.

detailed description

In order to make the purpose, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the present utility model.

As shown in Figure 1: a hybrid media gateway for power distribution communication network. The hand-in-hand loop breakpoint communication relay means realizes the ring power distribution network communication. The network mainly includes: optical fiber interface, conversion unit, judgment/switching module and carrier unit.

The optical fiber interface is the optical fiber interface 1 and the optical fiber interface 2 connected to the optical fiber breakpoint A and the optical fiber breakpoint B respectively.

In order to ensure that the network of the present utility model can adapt to the connection of the xPON system and the optical fiber Ethernet system, as a preferred embodiment, the optical fiber interface 1 and the optical fiber interface 2 all adopt standard ports to adapt to multiple different interfaces, so as to ensure Interconnection between different devices and systems.

The conversion unit is connected to the optical fiber interface and is responsible for receiving optical signals transmitted by external equipment and transmitting optical signals inside the network to external equipment, that is, mainly responsible for converting optical signals and electrical signals.

As a preferred embodiment, the conversion unit mainly includes an optical signal receiving module for receiving the optical signal introduced into the network of the present invention by the optical fiber interface 1 and the optical fiber interface 2 .

It also includes an optical signal transmitting module, which is used to transmit the signal inside the network of the utility model to the external optical communication equipment connected with the optical fiber interface.

Correspondingly, in order to ensure the conversion of the photoelectric signal, a necessary photoelectric signal conversion unit is also included.

At the same time, in order to be able to monitor the temperature parameters of the module, the conversion unit also includes a judgment module mainly used for temperature parameter monitoring.

As a preferred embodiment, the conversion unit can complete the monitoring of real-time communication quality in optical fiber communication. The monitoring is mainly realized by monitoring the received optical power, transmitted optical power and optical module temperature parameters, and can also be based on actual application scenarios and Add monitoring of other parameters as needed.

Judgment switching unit, this module is connected with the conversion unit, is the core component in the network of the utility model, and mainly completes two detection tasks.

1. Monitoring the detection parameters of the optical port of the conversion unit.

2. Monitoring the electrical signal output by the conversion unit, the electrical signal mainly includes parameters such as bit error rate, delay and jitter.

As a preferred implementation mode, it is connected through a common electrical interface to ensure full support for xPON and optical Ethernet, as well as single optical fiber and dual optical fiber, by replacing the module.

In the embodiment of the present utility model, the judgment switching unit can generally be connected to a plurality of the conversion units. According to the more general requirements, it can be connected to 4 conversion units at the same time. When it is necessary to increase the number of conversion units, only It is necessary to simply increase the number of general interfaces of the marriage judgment module.

During the normal working process, when the judging switching unit monitors that any of the parameters of optical port parameters, electrical signal error rate, delay and jitter is unqualified, it will switch the data transmission channel, switch to the backup redundant transmission channel, and switch to another said conversion unit inside the network. For example, the conversion unit connected to the optical fiber interface 1# in the accompanying drawing 1 has abnormal conditions of any of the above parameters, which means that the optical network unit ONU connected to the optical fiber interface 1# cannot communicate with the outside world through the original optical line terminal OLT. communication.

The judgment switching unit is about to switch the original transmission channel via the optical fiber interface 1# to the conversion unit connected with the optical fiber interface 2#. In the utility model, the optical fiber interface 2# is used as the redundancy of the aforementioned optical network unit ONU. For other output ports, when the optical fiber interface 1# fails, because it receives the same signal transmitted by the optical splitter and transmitted to the OLT, it can be judged that the optical line terminal OLT or the connected optical fiber is faulty, and the optical fiber can be switched. At the same time, the transmission channel corresponding to interface 2# starts the carrier unit to complete the transmission of the signal of the ONU device connected to the gateway through the power network through other OLTs from the network.

After switching the transmission channel, the judging switching unit continues to monitor the communication status of the optical fiber. If the communication quality meets the built-in standard and the duration reaches 30 minutes, the judging switching unit will switch back to the original optical communication channel from the carrier unit.

As a preferred implementation, the judgment switching unit also has encryption, isolation and filtering mechanisms.

Since there are 4 conversion units connected to a standard mixed-media gateway in the embodiment of the utility model, the judging/switching module is connected to the conversion module through different module interfaces, physically isolating the 4-way signals. On the basis of physical isolation, the judging/switching module also performs hardware encryption on the 4-way signals, and adds different digital signal labels on the basis of the original signals to distinguish them, so as to ensure that the 4-way signals are transmitted simultaneously in the same carrier channel. do not affect each other.

Furthermore, as a preferred embodiment, the judgment switching unit can also compare and filter out duplicate data according to the data input by multiple connected conversion units, and only transmit one valid data to the carrier unit.

Furthermore, as a preferred embodiment, the judgment switching unit can also be directly turned off by the outside world through a remote computer or on-site manual switching function, to forcefully maintain the optical fiber communication or carrier communication state, and resume the automatic judgment switching function after canceling the forced.

As a preferred embodiment, the carrier unit includes a data format conversion module, a modulation and demodulation module, a signal amplification module, an impedance transformation module and a signal coupling module.

A component carrier can establish carrier communication with a plurality of peer component carriers. The operating frequency of the carrier can be flexibly adjusted according to the actual application scenario. It supports simultaneous transmission of multiple carrier signals of different frequencies on one cable.

A mixed media communication network, as shown in FIG. 2 : in this embodiment, for the convenience of introduction, the communication media network uses two regional optical communication networks connected by power lines as an example for illustration.

The regional optical communication network mainly consists of two optical network units (ONUs). Of course, more optical network units (ONUs) can be set according to actual application scenarios or hardware constraints.

The two ONU1 and ONU2 are connected to the optical line terminal OLT1 through optical fibers, and the signals of the ONUs themselves are collected through the optical line terminal OLT and then transmitted to external target devices.

In order to ensure that the ONU1 and ONU2 signals can still be transmitted to the target device when the optical line terminal OLT1 fails, as a preferred embodiment, in the normal working state, the ONU1 and ONU2 pass through the optical splitter respectively Connect with OLT1 and mixed-media gateway 1, and send signals to OLT1 and mixed-media gateway 1 at the same time. At this time, the mixed-media gateway 1 uses the aforementioned method to test whether the optical signal is in a normal working state, but does not send optical signals. At this time , the signals of ONU1 and 2 are mainly transmitted through OLT1.

When OLT1 fails and cannot complete the transmission of optical signals, the mixed-media gateway 1 detects an abnormality in the optical signal, turns on its own carrier unit and transmits it to the adjacent regional optical communication network through the power line network, and the mixed-media gateway 1 in the adjacent region After the gateway completes the conversion of the electrical-optical signal into an optical signal, the OLT2 of the adjacent network completes the transmission to the remote target device.

Furthermore, considering that there may also be problems with the optical fiber connected to the OLT1 (or OLT2) equipment in the regional optical communication network, such as a digging accident, the mixed-media gateway communicating with the ONU1 and ONU2 equipment through the optical splitter will also be unable to receive The signal transmitted to the ONU device, that is, the continuity of communication cannot be guaranteed.

Therefore, as a preferred implementation, the ONU1 and ONU2 (ONU3 and ONU4 are also set in the same way) are also directly connected to the mixed-media gateway through optical fibers, as shown in line 2 shown in FIG. 2 . This can ensure that when there is a problem with OLT1 and the optical fiber line, the signal of ONU1 and ONU2 can still be transmitted to the mixed media gateway through the redundant line, and then transmitted to OLT2 through the power carrier signal to complete the subsequent transmission of the signal.

The above is only a preferred embodiment of the utility model, but the scope of protection of the utility model is not limited thereto. Any equivalent replacement or change of the new technical solution and the concept of the utility model shall be covered by the protection scope of the utility model.

Claims (6)

1. A power distribution communication network hybrid media gateway, characterized in that it comprises: A plurality of optical fiber interfaces, a conversion unit connected to the optical fiber interfaces, a judging/switching unit connected to multiple conversion units, and a carrier unit; An even number of the optical fiber interfaces and connected conversion units constitute a default transmission channel and a redundant transmission channel; The optical fiber interface is connected to an optical network unit ONU or an optical line terminal OLT inside the regional optical fiber network through an optical fiber line; The conversion unit is connected to the optical fiber interface, receives the optical signal transmitted by the optical network unit ONU, and converts the optical signal into an electrical signal; converts the carrier signal/electrical signal transmitted by the optical fiber network in other areas into an optical signal. 2. A hybrid media gateway for a power distribution communication network according to claim 1, further characterized in that: the optical fiber interface adopts a standard optical fiber interface; the judgment/switching unit communicates with at least two conversion unit connection. 3. The mixed-media gateway for power distribution communication network according to claim 1, further comprising a judging module for judging the temperature parameters of the equipment. 4. The hybrid media gateway of a power distribution communication network according to claim 1, further characterized in that the judgment/switching unit isolates the signals transmitted by an even number of conversion units; simultaneously, the isolated signals are encrypted by hardware; Different digital signal labels are added on the basis of the original signal to ensure that the multi-channel signal transmission does not interfere with each other. 5. A ring communication network, characterized in that comprising: Multiple regional optical communication networks interconnected by power lines; The regional optical communication network includes: an optical line terminal OLT and a plurality of optical network units ONU connected to the OLT through optical fibers; An optical splitter is provided on the optical fiber connecting each optical network unit ONU to the OLT, and the optical fiber drawn from the optical splitter is connected to the optical fiber interface of the mixed-media gateway. 6. A kind of ring communication network according to claim 5, it is also characterized in that: described ONU is also directly connected with the hybrid media gateway in common area optical communication network by optical fiber, as redundant line; When there is a problem with the OLT and the optical fiber line connecting the ONU and the OLT, the optical signal of the ONU is transmitted to the mixed media gateway through the redundant line, and then transmitted to the OLT2 through the power carrier signal to complete the subsequent transmission of the signal.