CN101039249B - A method and multiplexing device for transmitting monitoring data - Google Patents

Abstract

The invention discloses a method for transmitting monitoring data and multiplexing equipment, and relates to the technical field of network management. The transmission network of monitoring data is a closed loop formed by connecting at least one multiplexing device with the monitoring center equipment. A logical loop transmits respective monitoring data in one direction to the destination device, and the remaining logical loops serve as redundant protection logical loops for the certain logical loop. The multiplexing device includes an E1 interface unit, and also includes a protocol analysis unit and a statistical multiplexing processing unit. The invention can provide redundant protection function, improve the reliability of monitoring data transmission, and can multiplex the time slots on the transmission link, so that the access station is not limited by the time slots.

Description

A method and multiplexing device for transmitting monitoring data

[technical field]

The invention relates to the technical field of centralized monitoring of the power environment of a communication network, in particular to a method for transmitting monitoring data and multiplexing equipment.

[Background technique]

Monitoring data transmission equipment is a part of the power environment monitoring system in the computer room. Such equipment in the prior art mainly uses time slot insertion technology to realize the transmission of monitoring data, that is, on an E1/T1 transmission link, each site uses Corresponding to several time slots, the monitoring data of the corresponding station is inserted into the time slots on the transmission link, so as to be transmitted to the next device, and finally reach the destination device. The main disadvantages of existing monitoring data transmission equipment are as follows:

On the one hand, there is no redundant protection function on the equipment. Once a failure occurs in the middle of the transmission link between the equipment, the monitoring data cannot be transmitted to the monitoring center, so that the entire monitoring system is in a state of paralysis; on the other hand, due to the use of time slot insertion Technology, so that the number of accessible stations on the transmission link is limited by the number of time slots, which is not conducive to expanding the number of stations in the entire monitoring system according to specific conditions.

[Content of the invention]

The technical problem to be solved by the present invention is to provide a method for transmitting monitoring data and multiplexing equipment. On the one hand, it can provide redundant protection functions and improve the reliability of monitoring data transmission; time slots, so that access stations are not limited by time slots.

Technical scheme of the present invention is:

A method for transmitting monitoring data, the transmission network is a closed loop formed by connecting at least one multiplexing device with a monitoring center device, including: the monitoring data on each device passes through a logical multi-loop formed between it and adjacent devices One of the logical loops transmits the respective monitoring data in one direction to the destination device, and the remaining logical loops serve as redundant protection logical loops for the certain logical loop.

The method further includes: enabling the entire redundant protection logical loop to continue transmitting the monitoring data when the certain logical loop fails.

Enabling the entire redundant protection logical loop to continue transmitting the monitoring data further includes: each device is connected to another E1 port to form the entire redundant protection logical loop, and continuing to transmit the monitoring data.

The method further includes: when a fault occurs in the certain logical loop, enabling a complete loop composed of a partial loop of the redundant protection logical loop and a non-faulty loop in the certain logical loop, continued Pass the monitoring data. The method further includes: in the certain logical loop, the equipment at both ends of the loop without a fault occurs connects the partial loop of the redundant protection logical loop with the non-faulty loop in the certain logical loop, in the said certain logical loop On connected devices, the monitoring data is looped from a part of the redundant protection logical ring back to the non-faulty ring in the certain logical ring, or the monitoring data is transferred from the certain logical ring Loops the surviving ring back to the portion of the redundant protection logical ring.

The fault detection is E1 signal normality detection, E1 frame synchronization signal normality detection or communication protocol detection.

The method also includes: dividing all available time slots in the logical loop into business channels and maintenance operation management channels, the business data in the monitoring data are all multiplexed to the business channel for transmission, and the management in the monitoring data Data is transferred using the maintenance operations management channel.

The maintenance operation management channel occupies at least one time slot, and the service channel occupies all remaining available time slots.

A multiplexing device, including an E1 interface unit for receiving and sending data information, and also includes a protocol analysis unit and a statistical multiplexing processing unit, the protocol analysis unit analyzes the protocol information received by the E1 interface unit, and obtains all The fault information of each port of the E1 interface unit, the statistical multiplexing processing unit selects an available port of the E1 interface unit to continue receiving and sending data information according to the fault information.

The statistical multiplexing processing unit selects the management data and service data in the monitoring data to be sent in at least one specific time slot and all remaining available time slots, and sends them out by the E1 interface unit.

The multiplexing device of the present invention can build a logical double-loop monitoring data transmission network, and when a single fault occurs on the transmission line, it can realize a redundant protection function, so that the monitoring system function is not affected, and the reliability of monitoring data transmission is improved; because the entire loop Statistical multiplexing is adopted. All available time slots on the E1 line are divided into business channels and maintenance operation management channels. All monitoring data are transmitted through the business channels. Stations do not correspond to time slots, which increases the number of accessable channels on the transmission ring. The number of stations, so that the access station is not limited by the time slot of the transmission link.

[Description of drawings]

Fig. 1 is a schematic diagram of the network connection of the monitoring system of the present invention.

Fig. 2 is a schematic diagram (1) of monitoring data transmission when the network of the monitoring system fails.

Fig. 3 is a schematic diagram (2) of monitoring data transmission when the network of the monitoring system fails.

Fig. 4 is a functional block diagram of the multiplexing device of the present invention.

[Detailed ways]

The present invention is further elaborated below in conjunction with accompanying drawing and embodiment:

Fig. 1 is the network connection schematic diagram of monitoring system of the present invention, and the network of this monitoring system is the closed loop that a plurality of multiplexing equipment (being 7 in the figure) is connected with monitoring center equipment sequentially and forms, between each equipment there are two Line phase connection (one-way circuit connection of E1 circuit segment between each multiplexing device and neighboring devices), forming a logical double ring, the composition of the logical double ring has nothing to do with the physical realization of these E1 circuit segments (such as SDH ring, point-to-point, etc.) In other words, the logical double ring refers to a business logic double ring (that is, the double ring with data flow upward) constructed by the E1 circuit, and the physical realization refers to the physical topology of the communication network supporting the business double ring, which may be a ring network, Various physical topologies such as chain and star, so the logical double ring is completely independent from the physical transmission circuit, and the hierarchical relationship of the networking is clear; the entire monitoring system is composed of several independent logical double rings.

In the figure, the data flow direction of the outer ring is clockwise, and the data flow direction of the inner ring is counterclockwise. The redundant protection logical ring of the outer ring (or the redundant protection logical ring of the outer ring as the inner ring). Of course, the data flow direction of the inner and outer rings is not fixed. It can also be that the data flow direction of the outer ring is counterclockwise, and the data flow direction of the inner ring is clockwise, or even the data flow direction of the inner and outer rings is the same (both counterclockwise or Clockwise) is also possible, the receiving/sending port of the CE1 interface of each device is respectively connected to the corresponding direction of the inner ring/outer ring.

When the monitoring system is under normal conditions, the monitoring data sent by the monitoring center equipment to a certain multiplexing equipment in the loop will first be sent to the adjacent multiplexing equipment in the clockwise direction. If it is the monitoring data corresponding to the station, Then the multiplexing equipment of the base station will receive the monitoring data and process it accordingly. If it is not the monitoring data of the own station, the multiplexing equipment of the base station will continue to send it to the adjacent base station in the clockwise direction, and so on, until the monitoring data of the base station The monitoring data is sent to the destination device; the data sent from the base station to the monitoring center is also sent by the multiplexing equipment of the base station to the adjacent base station in the clockwise direction. Since the destination address of the data is the monitoring center, Therefore, the multiplexing equipment of all base stations in the clockwise direction will continue to forward the data to the next adjacent equipment until it reaches the monitoring center.

Fig. 2 is a schematic diagram (1) of monitoring data transmission when the network of the monitoring system fails. The data flow direction of the outer ring is clockwise, and the data flow direction of the inner ring is counterclockwise, and the inner ring is used as a redundant protection logic ring of the outer ring; the fault of the network occurs in the link between multiplexing equipment A and multiplexing equipment B On the road, whether a single line of the E1 line fails or both lines of the E1 line fail, at this time multiplexing equipment A and multiplexing equipment B will automatically perform redundancy protection processing, and the transmission path of the monitoring data is as follows: As shown by the arrow in the figure, the monitoring data is continued by adopting the method of rebuilding the logical loop, wherein the reconstructed logical loop is divided into two sections: the first section is the demultiplexing equipment A and the multiplexing equipment The inner ring other than the link between B, the second segment is the outer ring except the link between multiplexing equipment A and multiplexing equipment B, the reconstructed logical ring is a complete Loop, multiplexing equipment A and multiplexing equipment B are used as the linking equipment of the two sections of the loop. On the multiplexing equipment B, the monitoring data is looped from the second section of the loop back to the first section of the loop. In the multiplexing equipment The monitoring data on A is looped from the first section of the loop back to the second section of the loop, and finally returned to the monitoring center equipment, thus realizing the redundant protection function of the monitoring system.

Fig. 3 is a schematic diagram (2) of monitoring data transmission when the network of the monitoring system fails. The data flow direction of the outer ring and the data flow direction of the inner ring are both counterclockwise. In the figure, the outer ring is used as the redundant protection logical ring of the inner ring (of course, the inner ring can also be used as the redundant protection logical ring of the outer ring), Under normal circumstances, the monitoring data is transmitted through the inner ring, as shown in the solid arrow in the figure. When the inner ring fails, each device is connected to another E1 port to form a redundant protection logic ring, and the monitoring data is continuously transmitted. That is, the entire monitoring system network enables all outer rings to continuously transmit monitoring data, as shown in the dotted arrow in the figure.

For fault detection, methods such as E1 signal normality detection, E1 frame synchronization signal normality detection, or communication protocol detection can be used. As long as any method detects a fault, the port line is considered to be faulty. Communication protocol detection is a protocol defined in the system, including the link report protocol, each device will regularly send link report protocol data to adjacent devices, and the device can analyze the fault by analyzing the protocol detection.

It should be pointed out that the logical double rings formed between the devices can also be logical three rings or more, which can also play a role of redundancy protection and realize the purpose of the present invention, and their working principles are basically similar.

In order to overcome the defects caused by the correspondence between stations and time slots in the prior art, the present invention uses statistical multiplexing to transmit monitoring data, that is, all available time slots in the logical loop (in the E1 line) are divided into business channel and maintenance operation management channel (OAM channel), and the OAM channel only occupies one time slot, and the business channel occupies all the remaining available time slots; the business data in the monitoring data of all devices are multiplexed and shared with the business channel for transmission, while The management data in the monitoring data is transmitted using the OAM channel. All devices on the loop can multiplex the serial port data to the service channel when the line is idle, instead of time slot extraction and time division multiplexing, so that the number of base stations will not be limited by time slots, making the base station The access capability has been further enhanced.

Fig. 4 is a functional block diagram of the multiplexing device of the present invention. The multiplexing device includes an E1 interface unit, a protocol analysis unit and a statistical multiplexing processing unit, wherein the E1 interface unit is used to receive and send data information, and the entire system judges the working conditions of the network through the network management protocol, and the When a fault occurs, the protocol analysis unit analyzes the protocol information received by the E1 interface unit and judges the processing results of the protocol, so as to know the fault situation of the network, that is, the fault information of each port of the E1 interface unit, and the statistical multiplexing processing unit according to the fault information , selecting an available port of the E1 interface unit to continue receiving and sending data information, that is, the statistical multiplexing processing unit selects an available communication line according to the fault information, thereby realizing redundancy protection.

The statistical multiplexing function of the multiplexing device of the present invention is realized in the following way: the statistical multiplexing processing unit selects the management data and service data in the monitoring data to be sent respectively in at least one specific time slot and all remaining available time slots, It is sent out by the E1 interface unit; in the power environment centralized monitoring network, the flow of management data is relatively small compared with business data, so the present invention allocates management data to send in specific time slots, which is beneficial to better Utilizing the remaining available time slots to send business data is more flexible than the prior art of “fixing all data in specific time slots for transmission”. In addition, management data can be allocated in It is transmitted in two or more specific time slots.

In summary, the present invention uses redundant protection technology and statistical multiplexing technology in the multiplexing equipment of the power environment monitoring system, thereby realizing the redundant protection of the power environment monitoring system at the E1 line level and breaking through E1 The number of slots is limited to the number of stations.

Claims (9)

1. A method for transmitting monitoring data, the transmission network is a closed loop formed by at least one multiplexing device being connected with the monitoring center equipment, it is characterized in that, comprising: the monitoring data on each device is passed between it and the adjacent equipment A certain logical loop in the logical multi-ring formed between, unidirectionally transmit respective monitoring data, to the destination equipment, and the remaining logical loop is used as the redundant protection logical loop of the certain logical loop; also includes: When a fault occurs in the certain logical loop, a complete loop composed of a partial loop of the redundant protection logical loop and a non-faulty loop in the certain logical loop is enabled, and the monitoring data is continued to be transmitted. . 2. A method for transmitting monitoring data according to claim 1, further comprising: when the certain logical loop fails, enabling the entire redundant protection logical loop to continue transmitting the monitoring data . 3. A method for transmitting monitoring data according to claim 2, characterized in that enabling the entire redundant protection logical loop to continue transmitting the monitoring data further comprises: each device uses another E1 port instead The connection forms the entire redundant protection logical loop, and continues to transmit the monitoring data. 4. A method for transmitting monitoring data according to claim 1, further comprising: in the certain logical loop, the devices at both ends of the faulty loop do not connect to the partial loop of the redundant protection logical loop circuit and the non-faulty loop in the certain logical loop, on the connected equipment, the monitoring data is looped back to the certain logical loop from the partial loop of the redundant protection logical loop There is no faulty loop, or the monitoring data is looped from the non-faulty loop in the certain logical loop back to the partial loop of the redundant protection logical loop. 5. A method for transmitting monitoring data according to any one of claims 2 to 4, characterized in that the detection of the fault is E1 signal normality detection, E1 frame synchronization signal normality detection or communication protocol detection. 6. A method for transmitting monitoring data according to any one of claims 1 to 4, further comprising: dividing all available time slots in the logical loop into business channels and maintenance operation management channels, The service data in the monitoring data is transmitted by multiplexing the service channel, and the management data in the monitoring data is transmitted by using the maintenance operation management channel. 7. A method for transmitting monitoring data according to claim 6, wherein the maintenance operation management channel occupies at least one time slot, and the service channel occupies all remaining available time slots. 8. A multiplexing device, comprising an E1 interface unit, for receiving and sending data information, characterized in that: it also includes a protocol analysis unit and a statistical multiplexing processing unit, and the protocol analysis unit resolves the data received by the E1 interface unit According to the fault information, the statistical multiplexing processing unit selects an available port of the E1 interface unit to continue receiving and sending data information. 9. A multiplexing device according to claim 8, characterized in that: the statistical multiplexing processing unit selects the management data and service data in the monitoring data to be sent in at least one specific time slot and the remaining time slot respectively In all available time slots, the E1 interface unit sends out. the

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