CN105450484B - Electric power terminal multi-service telecommunications access systems implementation method based on timeslice isolation - Google Patents

Abstract

A method for implementing a power terminal multi-service communication access system based on time slice isolation. It includes building a communication system; the optical line terminal processes the downlink signal; the optical network unit processes the signal; the optical line terminal processes the uplink signal. The effect of the power terminal multi-service communication access system based on time slice isolation provided by the present invention: using the power EPON communication system based on time slice isolation of the present invention to carry multiple services, the power system with different power safety level requirements and isolation requirements Services are carried by the same communication system, thereby reducing network construction costs and optical fiber occupation.

Description

Implementation method of power terminal multi-service communication access system based on time slice isolation

technical field

The invention belongs to the technical field of power system communication, and in particular relates to a method for realizing a power terminal multi-service communication access system based on time slice isolation.

Background technique

At present, the construction principle of power system terminal communication access network is based on optical fiber communication technology, with wireless and power line carrier as important supplements. The power terminal communication access network carries related services including power distribution automation, power consumption information collection, distributed power supply, intelligent charging and discharging stations, etc. Different services have different characteristics such as bandwidth requirements and real-time requirements. According to the "Security Protection Regulations for Electric Power Secondary System", it is divided into production control area and management information area business, especially the production control area business such as distribution automation should be transmitted on a dedicated channel and isolated from other networks at the physical level . Since EPON technology is an asynchronous transmission network based on Ethernet, it cannot currently meet the business isolation requirements of power companies. To solve this problem, it is necessary to improve the design of the EPON system itself.

Contents of the invention

In order to solve the above problems, the object of the present invention is to provide a method for implementing a power terminal multi-service communication access system based on time slice isolation.

In order to achieve the above object, the implementation method of the power terminal multi-service communication access system based on time slice isolation provided by the present invention includes the following steps executed in order:

Step 1) Build the communication system:

Constructing a communication system based on an EPON network, said communication system comprising: an optical line terminal, an optical distribution network, and a plurality of optical network units, wherein: the optical line terminal is connected to a plurality of optical network units through an optical distribution network;

Step 2) The optical line terminal processes the downlink signal:

The production control area processing business module inside the optical line terminal is completely independent from the management information area business processing module. When the business is downlink, a certain business processing module in the above optical line terminal sends data to the PON port through the cross bus. Then convert it into an optical signal and send it to the optical network unit 3;

Step 3) The optical network unit processes the signal:

When the optical module of the optical network unit receives the signal, it judges the partition of the signal through the buffer and preprocessing module. After the judgment is completed, the data is distributed to the corresponding service processing module. After the service processing module is processed, the signal to be uploaded is returned to the optical The module uploads data, and immediately clears the buffer area to wait for the data of the next time slice after the upload is completed;

Step 4) The optical line terminal processes the uplink signal:

When the uplink service signal enters the optical line terminal, it judges the service identifier on the time slice, and enters the corresponding service processing module through the cross bus for processing; at this time, the EPON network enters the next time slice and starts another large security area Business sending and receiving, so alternately.

The optical line terminal is arranged in the power distribution room of the substation or the residential area, and is connected with the optical network units in each distribution substation through the optical distribution network.

The optical network unit is arranged on the side of the power service terminal equipment, and is connected to the optical line terminal through the optical distribution network to realize the access of the power terminal communication service.

The optical distribution network is composed of optical cables laid at the same time as the power supply lines.

The effect of the power terminal multi-service communication access system based on time slice isolation provided by the present invention:

Utilizing the power EPON communication system of the present invention based on time slice isolation and multi-service bearing, power system services with different power safety level requirements and isolation requirements are carried by the same communication system, thereby reducing network construction costs and optical fiber occupation.

Description of drawings

Figure 1 is a diagram of the working mode of the EPON network.

Fig. 2 is an internal principle diagram of the optical line terminal in the power terminal multi-service communication access system based on time slice isolation provided by the present invention.

Fig. 3 is an internal schematic diagram of an optical network unit in the power terminal multi-service communication access system based on time slice isolation provided by the present invention.

Detailed ways

The implementation method of the power terminal multi-service communication access system based on time slice isolation provided by the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

The implementation method of the power terminal multi-service communication access system based on time slice isolation provided by the present invention includes the following steps executed in sequence:

Step 1) Build the communication system:

Build a communication system based on the EPON network. A typical EPON system optical link full protection mode is shown in Figure 1. The communication system includes: Optical Line Terminal (OLT) 1, Optical Distribution Network (ODN) 2 and multiple an optical network unit (ONU) 3, wherein: an optical line terminal 1 is connected to a plurality of optical network units 3 through an optical distribution network 2;

The optical line terminal 1 is arranged in a power distribution room of a substation or a residential area, and is connected to an optical network unit 3 in each power distribution station through an optical distribution network 2 .

When the optical line terminal 1 performs signal processing, its internal business processing module of the production control area only processes the business information of the production control area, and the business processing module of the management information area only processes the business information of the management information area. The business processing module of the production control area and the business processing module of the management information area are connected to the power backbone communication network through their respective Ethernet interfaces to realize data upload.

The optical network unit 3 is arranged on the side of the power service terminal equipment, and is connected to the optical line terminal 1 through the optical distribution network 2 to realize the access of the power terminal communication service.

The optical network unit 3 is connected to the power service terminal equipment through an Ethernet port; in order to ensure service isolation, terminal equipment in different security areas are connected to different Ethernet ports on the optical network unit 3 respectively. Inside the optical network unit 3, the business processing module of the production control area only processes the business information of the production control area, and the business processing module of the management information area only processes the business information of the management information area.

The optical distribution network 2 is composed of optical cables laid at the same time as the power supply line. The working mode adopts the full protection mode of the optical link or the hand-in-hand protection mode, and can also adopt the unprotected mode.

The optical fiber networking mode of this system is consistent with the traditional EPON networking mode, but when the optical fiber link transmits signals, it is divided into periodic time slices in the time domain, and passes through the optical line terminal 1 and the optical network unit 3. Independent business processing module for data processing, so as to achieve physical isolation;

Step 2) The optical line terminal processes the downlink signal:

As shown in Figure 2, the production control large-area processing business module inside the optical line terminal 1 is completely independent from the management information large-area business processing module. Send it to the PON port through the cross bus, then convert it into an optical signal and send it to the optical network unit 3;

Step 3) The optical network unit processes the signal:

When the optical module of the optical network unit 3 receives the signal, it judges the partition of the signal through the cache and preprocessing module according to the method of FIG. Return the signal to be uploaded to the optical module for data upload. After the upload is completed, immediately clear the buffer area and wait for the data of the next time slice;

Step 4) The optical line terminal processes the uplink signal:

When the uplink service signal enters the optical line terminal 1, it judges the service identifier on the time slice, and enters the corresponding service processing module through the crossover bus for processing; at this time, the EPON network enters the next time slice and starts another security major The business sending and receiving of the district is carried out alternately in this way.

The service processing modules of different security areas on the optical network unit 3 are in one-to-one correspondence with the service processing modules of the corresponding security areas of the optical line terminal 1, and are distinguished by service identifiers. Through the crossover bus on the optical line terminal 1 and the cache and preprocessing module on the optical network unit 3, the data is distributed based on the above-mentioned service identification, so that each time slice on the optical link only allows the data occupation of a certain large security area, Thus, the multi-service isolation bearer function based on a communication system is realized.

The above-mentioned embodiment is only an implementation mode of the present invention, and its description is relatively specific and detailed, but should not be construed as limiting the scope of the present invention. The descriptions of the above embodiments are only used to help understand the core idea of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention. For those skilled in the art, without departing from the concept of the present invention, several modifications and improvements can be made, which all belong to the protection scope of the present invention.

The power terminal multi-service communication access system based on time slice isolation provided by the present invention combines service identifiers, divides the time domain into periodic time slices, and uses each time slice as a sub-channel for data transmission. Logically, each service occupies a different time slice, and physically, different services occupy physical channels in turn. For services carried on different time slices, only one service of one time slice is transmitted at a specific moment, completely realizing the isolation of different services in the time dimension. This allocates exclusive transmission channels for different service messages, realizing the function of carrying multiple power services with isolation requirements in the same communication system.

Claims (4)

1. A method for implementing a power terminal multi-service communication access system based on time slice isolation, the described method for implementing a power terminal multi-service communication access system based on time slice isolation comprises the following steps: Step 1) Build the communication system: A communication system based on an EPON network is constructed, and the communication system includes: an optical line terminal (1), an optical distribution network (2) and a plurality of optical network units (3), wherein: the optical line terminal (1) passes through an optical The distribution network (2) is connected to a plurality of optical network units (3); It is characterized in that: the implementation method of the power terminal multi-service communication access system based on time slice isolation also includes the following steps executed in sequence: Step 2) The optical line terminal processes the downlink signal: The business processing module of the production control area and the business processing module of the management information area inside the optical line terminal (1) are completely independent. The bus is sent to the PON port, then converted into an optical signal and sent to the optical network unit (3); Step 3) The optical network unit processes the signal: When the optical module of the optical network unit (3) receives the signal, it judges the partition of the signal through the cache and preprocessing module. After the judgment is completed, the data is distributed to the corresponding service processing module. The signal is returned to the optical module for data upload. After the upload is completed, the buffer area is immediately cleared to wait for the data of the next time slice; Step 4) The optical line terminal processes the uplink signal: After the uplink service signal enters the optical line terminal (1), it judges the service identification on the time slice, and enters the corresponding service processing module through the crossover bus for processing; at this moment, the EPON network enters the next time slice and starts another The sending and receiving of services in the security area is carried out alternately. 2. The method for realizing the power terminal multi-service communication access system based on time slice isolation according to claim 1, characterized in that: the optical line terminal (1) is set in the power distribution room of the substation or the residential area, through the optical distribution The network (2) is connected to the optical network unit (3) in each substation. 3. The method for realizing the power terminal multi-service communication access system based on time slice isolation according to claim 1, characterized in that: the optical network unit (3) is set on the side of the power service terminal equipment, through the optical distribution network (2) Connect with the optical line terminal (1) to realize the access of the power terminal communication service. 4. The method for realizing the multi-service communication access system of power terminals based on time slice isolation according to claim 1, characterized in that: the optical distribution network (2) is composed of optical cables laid at the same time as the power supply lines.