CN105516268A - Real time peer-to-peer communication system of power distribution terminals based on power distribution network EPON and method thereof - Google Patents
Real time peer-to-peer communication system of power distribution terminals based on power distribution network EPON and method thereof Download PDFInfo
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- CN105516268A CN105516268A CN201510855912.1A CN201510855912A CN105516268A CN 105516268 A CN105516268 A CN 105516268A CN 201510855912 A CN201510855912 A CN 201510855912A CN 105516268 A CN105516268 A CN 105516268A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/104—Peer-to-peer [P2P] networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/22—Traffic shaping
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/24—Traffic characterised by specific attributes, e.g. priority or QoS
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/16—Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
- H04L69/161—Implementation details of TCP/IP or UDP/IP stack architecture; Specification of modified or new header fields
- H04L69/162—Implementation details of TCP/IP or UDP/IP stack architecture; Specification of modified or new header fields involving adaptations of sockets based mechanisms
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Abstract
The invention discloses a real time peer-to-peer communication system of power distribution terminals based on a power distribution network EPON and a method thereof. The system comprises an optical line terminal; one end of the optical line terminal is connected to a main power distribution station; the other end and an optical splitter are mutually connected; the optical splitter and a plurality of optical network units communicate mutually; the optical network units are equipped with traffic shaping configuration function; the optical network units are used for providing Ethernet interfaces to power distribution terminals; every optical network unit is connected to one power distribution terminal; real time peer-to-peer communication is realized among the power distribution terminals through transmitting messages successively by the optical network units and the optical splitter; the messages are sent to a specific IP address through a specific port number; a communication unit and a priority configuration unit are arranged in every power distribution terminal; the physical layers of the communication units are connected with the optical network units; the priority configuration units are connected with the network layers and the link layers of the communication units; the priority configuration units filter the communication messages of all communication units; the priorities of the messages of the specific port number are configured and are mapped to an IP layer or/and an MAC layer.
Description
Technical field
The invention belongs to intelligent distribution type feeder automation field, particularly relate to the real-time peer communication system of a kind of distribution terminal based on power distribution network EPON and method thereof.
Background technology
Distributed intelligence technology is the critical support technology of intelligent distribution network, peer-to-peer communications is the basis of distributed intelligence technology, real-time is the key index of peer-to-peer communications technology, and the distributed intelligence technology based on GOOSE is the study hotspot of intelligent distribution network distributed intelligence feeder automation.
But adopt the GOOSE communication technology of bottom MAC Address configuration cannot adapt to the multi-point and wide-ranging requirement of Intelligent power distribution terminal, although adopt the UDP of IP address configuration can carry out networking configuration very easily, the impact of real-time but by network loading factors of UDP is very large.In addition, the two-way communication time delay of correcting time in network supposition communication is equal, the effect of jitter of the communication delay precision of correcting time in network.The downlink communication of EPON channel adopts broadcast mode, and speed can reach 1GBPS; Uplink communication adopts time division multiplexing, and the bandwidth of 1G needs multiple optical splitter ONU to divide equally, and may be 1/tens of downlink bandwidth, cause the shake of communication delay.
At present, EPON communication system obtains ripe application in distribution network automated, but the problems referred to above are not yet paid attention to, be difficult to the needs meeting distributed intelligence technology, and potential safety hazard is existed to the construction of intelligent distribution network and even the safety and economic operation of whole electric power system.
Summary of the invention
In order to solve the shortcoming of prior art, the invention provides the real-time peer communication system of a kind of distribution terminal based on power distribution network EPON and method thereof.Real-time when the present invention adopts the method for configuration message priority to improve the peer-to-peer communications of distribution terminal, and adopt the traffic shaping of configuration optical network unit to reduce the jitter of communication delay.
For achieving the above object, the present invention is by the following technical solutions:
The real-time peer communication system of distribution terminal based on power distribution network EPON, comprising:
Optical line terminal, one end of described optical line terminal is connected with distribution main website, the other end by simple optical fiber and optical splitter interconnected; The optical network unit that described optical splitter has traffic shaping configuration feature with several intercoms mutually, and described optical network unit is used for providing Ethernet interface for distribution terminal, and each described optical network unit all connects a distribution terminal;
Transmit message by optical network unit and optical splitter successively between distribution terminal and realize real-time peer-to-peer communications; Described message is sent to particular ip address by certain port number service;
Be provided with communication unit and priority dispensing unit in each described distribution terminal, the physical layer of described communication unit is connected with optical network unit, and priority dispensing unit is connected with link layer with the network layer of communication unit; Described priority dispensing unit filters the communication message of all communication units, configures the priority of the message of certain port number and is mapped to IP layer or/and MAC layer.
Described optical line terminal is connected with distribution main website by switch.
Described optical network unit is also connected with other intelligent electronic devices.
Described communication unit is Socket communication unit.
A communication means for the real-time peer communication system of distribution terminal based on power distribution network EPON, comprising:
Step (1): the real-time peer communication system of distribution terminal connecting power distribution network EPON, the distribution terminal sending message is set to transmitting terminal, the distribution terminal receiving message is set to receiving terminal, and adopt flow shaping method to configure the traffic shaping parameter of optical network unit, make the upstream and downstream bandwidth of optical network unit consistent;
Step (2): first message is promoted message priority by priority dispensing unit by transmitting terminal, and is mapped to IP layer or/and MAC layer, is then sent to the communication unit of receiving terminal successively by optical network unit and optical splitter.
Message by certain port number is configured priority to described step (2) medium priority dispensing unit and the process being mapped to IP layer is:
The message of the certain port number that priority dispensing unit receiving communication unit sends, obtains the destination slogan corresponding to message, and records the packet buffer district pointer of described message in ICP/IP protocol stack;
When ICP/IP protocol stack drives layer to send message to Ethernet, ICP/IP protocol stack readjustment priority dispensing unit, and utilize packet buffer district pointer to modify the TOS configuration of message, complete message and configure in the priority of IP layer;
Ethernet is sent to communication unit after driving layer to receive the message of configuration of IP layer priority;
Finally, the message that priority has configured is sent to particular ip address by communication unit.
The message of reception is configured priority to described step (2) medium priority dispensing unit and the process being mapped to MAC layer is:
The message of the certain port number that priority dispensing unit receiving communication unit sends, obtains the destination slogan corresponding to message, records the packet buffer district pointer of described message in ICP/IP protocol stack;
ICP/IP protocol stack drives layer to send message to Ethernet;
After Ethernet drives layer to receive the message of ICP/IP protocol stack transmission class, Ethernet drive floor readjustment priority dispensing unit and utilize packet buffer district pointer modify message COS configuration, complete message to configure in the priority of MAC layer, and be sent to communication unit;
Finally, the message that priority has configured is sent to particular ip address by communication unit.
The message of reception is configured priority to described step (2) medium priority dispensing unit and the process being mapped to IP layer and MAC layer is:
The message with particular ip address that priority dispensing unit receiving communication unit is sent by certain port number, obtains the destination slogan corresponding to message, records the packet buffer district pointer of described message in ICP/IP protocol stack;
ICP/IP protocol stack to Ethernet drive layer send message time, ICP/IP protocol stack readjustment priority dispensing unit and utilize packet buffer district pointer modify message TOS configuration, complete message and configure in the priority of IP layer;
After Ethernet drives layer to receive the message of configuration of IP layer priority, Ethernet drives floor readjustment priority dispensing unit and utilizes packet buffer district pointer to modify the COS configuration of message, completes message and configures in the priority of MAC layer, and be sent to communication unit;
Finally, the message that priority has configured is sent to particular ip address by communication unit.
Beneficial effect of the present invention is:
(1) this real-time peer communication system of the present invention is a kind of real-time peer communication system of power distribution network EPON adopting cross-layer priority, the peer-to-peer communications achieved between distribution terminal realizes high real-time and low delay shake, for the intelligent distributed self-healing control application of intelligent distribution network lays the first stone;
(2) real-time when the present invention adopts the method for configuration message priority to improve the peer-to-peer communications of distribution terminal, in order to ensure the real-time of peer-to-peer communications message, have employed the configuration of IP/MAC or even two-layer priority;
(3) the present invention also adopts the traffic shaping of configuration optical network unit to reduce the jitter of communication delay.
Accompanying drawing explanation
Fig. 1 is the real-time peer communication system structural representation of the distribution terminal based on power distribution network EPON of the present invention;
Fig. 2 is the schematic flow sheet of priority dispensing unit of the present invention in communication protocol stack.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the present invention will be further described:
The real-time peer communication system of the distribution terminal based on power distribution network EPON that the present invention proposes, its concrete System's composition as shown in Figure 1.
Based on the real-time peer communication system of distribution terminal of power distribution network EPON, should comprise:
Optical line terminal, one end of described optical line terminal is connected with distribution main website, the other end by simple optical fiber and optical splitter interconnected; The optical network unit that described optical splitter has traffic shaping configuration feature with several intercoms mutually, and described optical network unit is used for providing Ethernet interface for distribution terminal, and each described optical network unit all connects a distribution terminal;
Transmit message by optical network unit and optical splitter successively between distribution terminal and realize real-time peer-to-peer communications; Described message is sent to particular ip address by certain port number service;
Be provided with communication unit and priority dispensing unit in each described distribution terminal, the physical layer of described communication unit is connected with optical network unit, and priority dispensing unit is connected with link layer with the network layer of communication unit; Described priority dispensing unit filters the communication message of all communication units, configures the priority of the message of certain port number and is mapped to IP layer or/and MAC layer.
The message of reception is carried out priority configuration by priority dispensing unit by distribution terminal, and is mapped to IP layer or/and MAC layer, carrys out the real-time peer-to-peer communications of distribution terminal.
Wherein:
1) optical line terminal OLT is the important local side apparatus that EPON communication system is deployed in transformer station, is connected, changes into light signal with front end switch netting twine, interconnected with the optical splitter of simple optical fiber and user side; Realize the control to distribution terminal equipment optical network unit ONU, management, range finding; And the same with ONU equipment, be the equipment of photoelectric integral.
2) ONU is the optical network unit that EPON communication system is deployed in distribution terminal side, and what be supplied to distribution terminal is Ethernet interface, supports 802.1P agreement.ONU traffic shaping feature in the present system, needs to carry out traffic shaping configuration to it.
The communication node of EPON communication system needs the function supporting traffic shaping, queue scheduling and Congestion Avoidance.The traffic shaping parameter of configuration EPON system ONU node, makes upstream and downstream bandwidth consistent.As: configure N number of OUN node in the OLT link of a feeder line, then downlink bandwidth carries out traffic shaping by (1024/N) million.
3) distribution terminal completes the concrete function of power distribution automation in the present system, for intelligent distribution type feeder automation, and mutual autonomous communication between distribution terminal.Distribution terminal completes the priority promotion function of power distribution automation communication service, and priority setting is mapped to IP layer and MAC layer.
The priority promotion of power distribution automation message is independently realized by message generation person, and the message distribution terminal that distribution terminal produces is responsible for configuring its priority, and whether the downlink message of distribution main website promotes its priority is discussed separately.In power distribution automation communication, the port that different communication protocols is corresponding different, particular port data are arranged to high priority, and priority is mapped to IP layer and MAC layer respectively, and the priority of IP layer is in TOS field, and the priority of MAC layer is in COS field.
4) ONU is except access distribution terminal, can also access other intelligent electronic devices IED, and normal priority transmission is pressed in other communication services.
5) the priority promotion function of distribution terminal power distribution automation communication service have employed the realization of priority dispensing unit.
Priority mapping: such as the peer-to-peer communications between distribution terminal is arranged to high priority 7; Communication between distribution terminal and distribution main website is also set to priority 7; The priority of other messages remains unchanged, and normal priority is 0.
The communication means of the real-time peer communication system of the distribution terminal based on power distribution network EPON of the present invention, comprising:
Step (1): the real-time peer communication system of distribution terminal connecting power distribution network EPON, the distribution terminal sending message is set to transmitting terminal, the distribution terminal receiving message is set to receiving terminal, and adopt flow shaping method to configure the traffic shaping parameter of optical network unit, make the upstream and downstream bandwidth of optical network unit consistent;
Step (2): first message is promoted message priority by priority dispensing unit by transmitting terminal, and is mapped to IP layer or/and MAC layer, is then sent to the communication unit of receiving terminal successively by optical network unit and optical splitter.
Further, the message of reception is configured priority and the process being mapped to IP layer is by step (2) medium priority dispensing unit:
The message with particular ip address that priority dispensing unit receiving communication unit is sent by certain port number, obtains the destination slogan corresponding to message, records the packet buffer district pointer of described message in ICP/IP protocol stack;
ICP/IP protocol stack to Ethernet drive layer send message time, ICP/IP protocol stack readjustment priority dispensing unit and utilize packet buffer district pointer modify message TOS configuration, complete message and configure in the priority of IP layer;
Ethernet is sent to communication unit after driving layer to receive the message of configuration of IP layer priority;
Finally, the message that priority has configured is sent to particular ip address by communication unit.
Further, the message of reception is configured priority and the process being mapped to MAC layer is by step (2) medium priority dispensing unit:
The message with particular ip address that priority dispensing unit receiving communication unit is sent by certain port number, obtains the destination slogan corresponding to message, records the packet buffer district pointer of described message in ICP/IP protocol stack;
ICP/IP protocol stack drives layer to send message to Ethernet;
After Ethernet drives layer to receive the message of ICP/IP protocol stack transmission class, Ethernet drive floor readjustment priority dispensing unit and utilize packet buffer district pointer modify message COS configuration, complete message to configure in the priority of MAC layer, and be sent to communication unit;
Finally, the message that priority has configured is sent to particular ip address by communication unit.
Fig. 2 gives the schematic flow sheet of priority dispensing unit in communication protocol stack.
Wherein, the message of reception is configured priority and the process being mapped to IP layer and MAC layer is by step (2) medium priority dispensing unit:
The message with particular ip address that priority dispensing unit receiving communication unit is sent by certain port number, obtains the destination slogan corresponding to message, records the packet buffer district pointer of described message in ICP/IP protocol stack;
ICP/IP protocol stack to Ethernet drive layer send message time, ICP/IP protocol stack readjustment priority dispensing unit and utilize packet buffer district pointer modify message TOS configuration, complete message and configure in the priority of IP layer;
After Ethernet drives layer to receive the message of configuration of IP layer priority, Ethernet drives floor readjustment priority dispensing unit and utilizes packet buffer district pointer to modify the COS configuration of message, completes message and configures in the priority of MAC layer, and be sent to communication unit; The message that MAC chip finally sends carries priority tag;
Finally, the message that priority has configured is sent to particular ip address by communication unit.
Wherein, communication unit is Socket communication unit.
By reference to the accompanying drawings the specific embodiment of the present invention is described although above-mentioned; but not limiting the scope of the invention; one of ordinary skill in the art should be understood that; on the basis of technical scheme of the present invention, those skilled in the art do not need to pay various amendment or distortion that creative work can make still within protection scope of the present invention.
Claims (8)
1., based on the real-time peer communication system of distribution terminal of power distribution network EPON, it is characterized in that, comprising:
Optical line terminal, one end of described optical line terminal is connected with distribution main website, the other end by simple optical fiber and optical splitter interconnected; The optical network unit that described optical splitter has traffic shaping configuration feature with several intercoms mutually, and described optical network unit is used for providing Ethernet interface for distribution terminal, and each described optical network unit all connects a distribution terminal;
Transmit message by optical network unit and optical splitter successively between distribution terminal and realize real-time peer-to-peer communications; Described message is sent to particular ip address by certain port number;
Be provided with communication unit and priority dispensing unit in each described distribution terminal, the physical layer of described communication unit is connected with optical network unit, and priority dispensing unit is connected with link layer with the network layer of communication unit; Described priority dispensing unit filters the communication message of all communication units, configures the priority of the message of certain port number and is mapped to IP layer or/and MAC layer.
2. the real-time peer communication system of a kind of distribution terminal based on power distribution network EPON as claimed in claim 1, it is characterized in that, described optical line terminal is connected with distribution main website by switch.
3. the real-time peer communication system of a kind of distribution terminal based on power distribution network EPON as claimed in claim 1, it is characterized in that, described optical network unit is also connected with other intelligent electronic devices.
4. the real-time peer communication system of a kind of distribution terminal based on power distribution network EPON as claimed in claim 2, it is characterized in that, described communication unit is Socket communication unit.
5., as claimed in claim 1 based on a communication means for the real-time peer communication system of distribution terminal of power distribution network EPON, it is characterized in that, comprising:
Step (1): the real-time peer communication system of distribution terminal connecting power distribution network EPON, the distribution terminal sending message is set to transmitting terminal, the distribution terminal receiving message is set to receiving terminal, and adopt flow shaping method to configure the traffic shaping parameter of optical network unit, make the upstream and downstream bandwidth of optical network unit consistent;
Step (2): first message is promoted message priority by priority dispensing unit by transmitting terminal, and is mapped to IP layer or/and MAC layer, is then sent to the communication unit of receiving terminal successively by optical network unit and optical splitter.
6. communication means as claimed in claim 5, is characterized in that, the message of reception is configured priority to described step (2) medium priority dispensing unit and the process being mapped to IP layer is:
The message with particular ip address that priority dispensing unit receiving communication unit is sent by certain port number, obtains the destination slogan corresponding to message, records the packet buffer district pointer of described message in ICP/IP protocol stack;
ICP/IP protocol stack to Ethernet drive layer send message time, ICP/IP protocol stack readjustment priority dispensing unit and utilize packet buffer district pointer modify message TOS configuration, complete message and configure in the priority of IP layer;
Ethernet is sent to communication unit after driving layer to receive the message of configuration of IP layer priority;
Finally, the message that priority has configured is sent to particular ip address by communication unit.
7. communication means as claimed in claim 5, is characterized in that, the message of reception is configured priority to described step (2) medium priority dispensing unit and the process being mapped to MAC layer is:
The message with particular ip address that priority dispensing unit receiving communication unit is sent by certain port number, obtains the destination slogan corresponding to message, records the packet buffer district pointer of described message in ICP/IP protocol stack;
ICP/IP protocol stack drives layer to send message to Ethernet;
After Ethernet drives layer to receive the message of ICP/IP protocol stack transmission class, Ethernet drive floor readjustment priority dispensing unit and utilize packet buffer district pointer modify message COS configuration, complete message to configure in the priority of MAC layer, and be sent to communication unit;
Finally, the message that priority has configured is sent to particular ip address by communication unit.
8. communication means as claimed in claim 5, is characterized in that, the message of reception is configured priority to described step (2) medium priority dispensing unit and the process being mapped to IP layer and MAC layer is:
The message with particular ip address that priority dispensing unit receiving communication unit is sent by certain port number, obtains the destination slogan corresponding to message, records the packet buffer district pointer of described message in ICP/IP protocol stack;
ICP/IP protocol stack to Ethernet drive layer send message time, ICP/IP protocol stack readjustment priority dispensing unit and utilize packet buffer district pointer modify message TOS configuration, complete message and configure in the priority of IP layer;
After Ethernet drives layer to receive the message of configuration of IP layer priority, Ethernet drives floor readjustment priority dispensing unit and utilizes packet buffer district pointer to modify the COS configuration of message, completes message and configures in the priority of MAC layer, and be sent to communication unit;
Finally, the message that priority has configured is sent to particular ip address by communication unit.
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| CN113824770A (en) * | 2021-08-25 | 2021-12-21 | 通号城市轨道交通技术有限公司 | Signal system of linked train and linked train communication method based on network convergence |
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| CN101415129A (en) * | 2007-10-16 | 2009-04-22 | 中兴通讯股份有限公司 | Method for configuring service quality parameter of Ethernet passive optical network |
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