CN108322407B - Multi-point chain type communication system and method based on high-speed differential communication - Google Patents
Multi-point chain type communication system and method based on high-speed differential communication Download PDFInfo
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- H—ELECTRICITY
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- H04L47/00—Traffic control in data switching networks
- H04L47/50—Queue scheduling
- H04L47/62—Queue scheduling characterised by scheduling criteria
- H04L47/625—Queue scheduling characterised by scheduling criteria for service slots or service orders
- H04L47/6275—Queue scheduling characterised by scheduling criteria for service slots or service orders based on priority
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/42—Loop networks
- H04L12/437—Ring fault isolation or reconfiguration
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/08—Configuration management of networks or network elements
- H04L41/0896—Bandwidth or capacity management, i.e. automatically increasing or decreasing capacities
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04L47/00—Traffic control in data switching networks
- H04L47/50—Queue scheduling
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Abstract
The invention discloses a multipoint chain type communication system and a method based on high-speed differential communication, which comprises the following steps: the system comprises a plurality of communication nodes which are connected in sequence, wherein the first communication node is a management node, every two adjacent communication nodes are communicated with each other, and four communication links are arranged between every two communication nodes for scheduling; each communication node comprises four communication links, the transceiving port of two adjacent communication links is virtualized to be one port of the communication node, the management node issues a scheduling command, and other communication nodes receive the scheduling command, wherein the scheduling command comprises three types: a power saving mode scheduling command, a loop mode scheduling command, or a concurrent mode scheduling command. The method can realize the monitoring of the multi-point chain communication node and simultaneously realize the scheduling functions of bandwidth scheduling, loop self-healing scheduling and the like.
Description
Technical Field
The invention relates to the technical field of high-speed differential communication, in particular to a multipoint chain type communication system and method based on high-speed differential communication.
Background
Along with the vigorous development of electric power utilities, the automation management level of electric power equipment is improved, an electric power tunnel is rapidly increased, the electricity consumption is increased, a cable runs for a long time, and in the electric power tunnel, the multipoint chain communication based on the high-speed differential communication has the characteristics of flexible configuration of communication distance, good access expansibility of terminal equipment, high flexibility and the like, but how to carry out communication scheduling becomes the key.
Disclosure of Invention
In order to solve the defects of the prior art, the invention provides a multipoint chain communication system and a multipoint chain communication method based on high-speed differential communication.
In order to achieve the purpose, the invention adopts the following technical scheme:
the multipoint chain type communication system based on high-speed differential communication comprises:
the system comprises a plurality of communication nodes which are connected in sequence, wherein the first communication node is a management node, every two adjacent communication nodes are communicated with each other, and four communication links are arranged between every two communication nodes for scheduling;
each communication node internally comprises four communication links: a first communication link, a second communication link, a third communication link, and a fourth communication link; the method comprises the steps of virtualizing a sending port of a first communication link and a receiving port of a second communication link as a first port of a current communication node, virtualizing a receiving port of the first communication link and a sending port of the second communication link as a second port of the current communication node, virtualizing a sending port of a third communication link and a receiving port of a fourth communication link as a third port of the current communication node, and virtualizing a receiving port of the third communication link and a sending port of the fourth communication link as a fourth port of the current communication node.
And the management node is responsible for communication state query and dispatching command issuing and managing the whole communication link.
The communication between every two adjacent communication nodes is based on the Ethernet protocol of high-speed serial ports.
The scheduling command is stored in a data link layer, and comprises a scheduling frame header and scheduling data, wherein the scheduling frame header is used for distinguishing the Ethernet data frame from the scheduling command.
If the data received by the communication node has no scheduling frame header, processing according to the network protocol frame, and forwarding or handing the received data to a self network protocol stack for processing; and if the data received by the communication node has a scheduling frame header, analyzing the scheduling command.
The multipoint chain communication method based on high-speed differential communication comprises the following steps:
the management node issues a scheduling command, and other communication nodes receive the scheduling command, wherein the scheduling command comprises three types: an energy-saving mode scheduling command, a loop mode scheduling command or a concurrent mode scheduling command;
if the command is an energy-saving mode scheduling command, each communication node enters an energy-saving mode, only the first communication link and the second communication link are in a working state, and the third communication link and the fourth communication link are in a closed state in the energy-saving mode;
if the communication node is a loop mode scheduling command, each communication node enters a loop mode, under the loop mode, a first port and a second port are in an active state, a third port and a fourth port are in a connected state, the priority of the first port is greater than that of the third port, and the priority of the second port is greater than that of the fourth port;
and (3) redundancy processing: when any one of the four ports detects that the current port is in a non-connection state, the remaining three ports change the mapping relation of data forwarding, and the normal operation of data communication is ensured;
loop self-healing scheduling: when any one of the four ports detects that the current port is in a state from a non-connection state to a connection state, the remaining three ports change the mapping relation of data forwarding; each port recovers the forwarding of the data according to the preset priority;
if the command is a concurrent mode scheduling command, each communication node enters a concurrent mode, and in the concurrent mode, the first communication link, the third communication link and the fourth communication link are uplink, and the second communication link is downlink, so that high-speed uplink transmission of data is realized.
And (3) redundancy processing: when the first port is in a non-connection state, the second port and the fourth port are both in communication relation with the third port, when the second port is in a non-connection state, the first port and the third port are both in communication relation with the fourth port, when the third port is in a non-connection state, the second port and the fourth port are both in communication relation with the first port, and when the fourth port is in a non-connection state, the first port and the third port are both in communication relation with the second port.
Compared with the prior art, the invention has the beneficial effects that:
by implementing the invention, the multipoint chain communication, the communication bandwidth scheduling and the self-healing scheduling can be realized, the monitoring of the multipoint chain communication node can be realized, and the scheduling functions of bandwidth scheduling, loop self-healing scheduling and the like can be realized.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
FIG. 1 is a schematic diagram of a communication node of the present invention;
FIG. 2 is a schematic diagram of data link layer based scheduling according to the present invention;
FIG. 3 is a schematic diagram of concurrent mode communication of nodes according to the present invention.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
As shown in fig. 1, a high-speed differential communication-based multi-point chain communication system includes a management node, which is sequentially followed by a node 1 and a node 2.
1) The management node is responsible for state query, command issuing and whole link management;
2) 4 communication links are available for scheduling;
3) each node virtualizes the transceiving of two links as a port.
As shown in fig. 2, based on the scheduling mode of the data link layer, the inter-node communication is based on the ethernet protocol of the high-speed serial port, and the scheduling command is placed in the data link layer. A data frame header is added to distinguish the Ethernet data frame from the scheduling command.
As shown in fig. 3, the whole communication link is divided into three communication modes, i.e., an energy-saving mode, a loop mode, and a concurrent mode.
1) Energy saving mode
And the node manager issues an energy-saving mode scheduling command, and the node enters an energy-saving mode.
In the energy-saving mode, only the link 1 and the link 2 are in the working state, and the link 3 and the link 4 are closed, so that energy-saving management can be realized.
2) Loop mode
And the node manager issues a loop mode scheduling command, and the node enters an energy-saving mode.
Loop mode, each port is normal
Under normal state, port 1 and port 2 are in active state, and port 3 and port 4 are in connected state;
priority port 1> port 3, port 2> port 4;
redundant processing
And when any 1-4 ports detect that the ports are in a no-connection state, changing the mapping relation during forwarding. For example, when port 1 is disconnected, data received at port 2 should be forwarded to port 3.
Loop self-healing scheduling
When the port 1 returns to normal, the data received by the port 2 should return to be forwarded by the port 1, that is, in a normal connection state, the priority of the port needs to meet the description of 1);
3) concurrent mode
When the node has big data to be transmitted in uplink, the node can apply to enter a concurrent mode, and a node manager issues a concurrent mode scheduling command according to the node state. In the concurrent mode, three links (links 1, 3 and 4) are used for uplink, and one link (link 2) is used for downlink, so that high-speed uplink transmission of data can be realized.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (9)
1. The multipoint chain type communication system based on high-speed differential communication is characterized by comprising the following components:
the method comprises the following steps that a plurality of communication nodes are sequentially connected, the first communication node is a management node, the management node issues a scheduling command, other communication nodes receive the scheduling command, and the scheduling command comprises three types: energy-saving mode scheduling commands, loop mode scheduling commands or concurrent mode scheduling commands, wherein every two adjacent communication nodes are communicated with each other, and four communication links are arranged between every two communication nodes for scheduling;
each communication node internally comprises four communication links: a first communication link, a second communication link, a third communication link, and a fourth communication link; the first communication link and the third communication link have the same direction, the second communication link and the fourth communication link have the same direction, and the directions of the first communication link and the second communication link are opposite; the method comprises the steps of virtualizing a sending port of a first communication link and a receiving port of a second communication link as a first port of a current communication node, virtualizing a receiving port of the first communication link and a sending port of the second communication link as a second port of the current communication node, virtualizing a sending port of a third communication link and a receiving port of a fourth communication link as a third port of the current communication node, and virtualizing a receiving port of the third communication link and a sending port of the fourth communication link as a fourth port of the current communication node.
2. The high speed differential communication based multi-drop chain communication system according to claim 1,
the management node is responsible for communication state query and dispatching command issuing and managing the whole communication link;
the communication between every two adjacent communication nodes is based on the Ethernet protocol of high-speed serial ports.
3. The high speed differential communication-based multipoint chain communication system of claim 1 wherein the scheduling command is stored at a data link layer, the scheduling command comprising a scheduling header and scheduling data, the scheduling header for distinguishing between the ethernet data frame and the scheduling command.
4. The multi-point chain communication system based on high-speed differential communication according to claim 1, wherein if the communication node receives data without a scheduling frame header, the communication node processes the data according to a network protocol frame, and forwards or hands the received data to a self network protocol stack for processing; and if the data received by the communication node has a scheduling frame header, analyzing the scheduling command.
5. The multi-point chain communication system based on high speed differential communication according to claim 1, wherein each communication node enters the power saving mode in case of a power saving mode scheduling command, and only the first communication link and the second communication link are in an active state and the third communication link and the fourth communication link are in a closed state in the power saving mode.
6. The high speed differential communication based multi-drop chain communication system according to claim 1,
if the communication node is a loop mode scheduling command, each communication node enters a loop mode, under the loop mode, a first port and a second port are in an active state, a third port and a fourth port are in a connected state, the priority of the first port is greater than that of the third port, and the priority of the second port is greater than that of the fourth port;
and (3) redundancy processing: when any one of the four ports detects that the current port is in a non-connection state, the remaining three ports change the mapping relation of data forwarding, and the normal operation of data communication is ensured;
loop self-healing scheduling: when any one of the four ports detects that the current port is in a state from a non-connection state to a connection state, the remaining three ports change the mapping relation of data forwarding; and each port resumes the forwarding of the data according to the preset priority.
7. The high speed differential communication based multi-drop chain communication system according to claim 1,
if the command is a concurrent mode scheduling command, each communication node enters a concurrent mode, and in the concurrent mode, the first communication link, the third communication link and the fourth communication link are uplink, and the second communication link is downlink, so that high-speed uplink transmission of data is realized.
8. The communication method according to claim 1, comprising:
the management node issues a scheduling command, and other communication nodes receive the scheduling command, wherein the scheduling command comprises three types: an energy-saving mode scheduling command, a loop mode scheduling command or a concurrent mode scheduling command;
if the command is an energy-saving mode scheduling command, each communication node enters an energy-saving mode, only the first communication link and the second communication link are in a working state, and the third communication link and the fourth communication link are in a closed state in the energy-saving mode;
if the communication node is a loop mode scheduling command, each communication node enters a loop mode, under the loop mode, a first port and a second port are in an active state, a third port and a fourth port are in a connected state, the priority of the first port is greater than that of the third port, and the priority of the second port is greater than that of the fourth port;
and (3) redundancy processing: when any one of the four ports detects that the current port is in a non-connection state, the remaining three ports change the mapping relation of data forwarding, and the normal operation of data communication is ensured;
loop self-healing scheduling: when any one of the four ports detects that the current port is in a state from a non-connection state to a connection state, the remaining three ports change the mapping relation of data forwarding; each port recovers the forwarding of the data according to the preset priority;
if the command is a concurrent mode scheduling command, each communication node enters a concurrent mode, and in the concurrent mode, the first communication link, the third communication link and the fourth communication link are uplink, and the second communication link is downlink, so that high-speed uplink transmission of data is realized.
9. The communication method of the system according to claim 8, wherein the redundancy process: when the first port is in a non-connection state, the second port and the fourth port are both in communication relation with the third port, when the second port is in a non-connection state, the first port and the third port are both in communication relation with the fourth port, when the third port is in a non-connection state, the second port and the fourth port are both in communication relation with the first port, and when the fourth port is in a non-connection state, the first port and the third port are both in communication relation with the second port.
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| CN101110663A (en) * | 2007-08-31 | 2008-01-23 | 华为技术有限公司 | Method, system and device for implementing periodic line failure processing |
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