CN111556104A - Seamless switching mode applied to data after multipath collection - Google Patents

Seamless switching mode applied to data after multipath collection Download PDF

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CN111556104A
CN111556104A CN202010297708.3A CN202010297708A CN111556104A CN 111556104 A CN111556104 A CN 111556104A CN 202010297708 A CN202010297708 A CN 202010297708A CN 111556104 A CN111556104 A CN 111556104A
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data
acquisition
path
uploading
application
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CN111556104B (en
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桂将林
俞林斌
曹辉
徐腾云
赵鸿鸣
徐泽春
黄小权
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Zhejiang Supcon Information Technology Co ltd
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00Network arrangements or protocols for supporting network services or applications
    • H04L67/01Protocols
    • H04L67/02Protocols based on web technology, e.g. hypertext transfer protocol [HTTP]
    • H04L67/025Protocols based on web technology, e.g. hypertext transfer protocol [HTTP] for remote control or remote monitoring of applications
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00Error detection; Error correction; Monitoring
    • G06F11/07Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/16Error detection or correction of the data by redundancy in hardware
    • G06F11/20Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements
    • G06F11/2002Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements where interconnections or communication control functionality are redundant
    • G06F11/2012Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements where interconnections or communication control functionality are redundant and using different communication protocols
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00Routing or path finding of packets in data switching networks
    • H04L45/22Alternate routing
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00Routing or path finding of packets in data switching networks
    • H04L45/24Multipath
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00Routing or path finding of packets in data switching networks
    • H04L45/28Routing or path finding of packets in data switching networks using route fault recovery
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00Network arrangements or protocols for supporting network services or applications
    • H04L67/01Protocols

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Theoretical Computer Science (AREA)
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Abstract

The invention discloses a seamless switching mode applied to data after multipath collection, which comprises N first pre-processors, an application server and a remote terminal unit; the method comprises a data acquisition process of a first front-end processor x, a data uploading process of the data acquisition process, a data receiving process of a data application process and a multipath data preferential switching process of the data application process. The invention has the characteristics that the multi-path data is local, and the seamless switching of the path data can be realized while the data application process completes the data optimization.

Description

Seamless switching mode applied to data after multipath collection
Technical Field
The invention relates to the technical field of data optimization and dynamic switching after multi-path data acquisition, in particular to a seamless switching mode applied to multi-path acquired data.
Background
In many integrated monitoring systems, a front-end processor is often deployed between an application server and a remote terminal unit to complete remote terminal data acquisition of a plurality of different data protocols. For a comprehensive monitoring system with high data real-time performance and safety, such as a subway rail transit comprehensive monitoring system, a serious problem that data is lost in the comprehensive monitoring system when a single preprocessor has abnormal conditions such as machine faults or network faults needs to be considered. Therefore, the integrated monitoring system usually deploys a plurality of pre-processors to acquire the data of the remote terminal in a multi-path manner, and for the multi-path data, one path of data needs to be selected to be used by a data application process, namely, the data of the main path. When the main path data is abnormal, the other path of effective data can be dynamically and quickly switched, and the real-time performance and the integrity of the data of the comprehensive monitoring system are ensured.
Currently, when most systems are applied to multi-channel data, a plurality of pre-processors are usually communicated with each other or a third-party technology is used for deciding a main pre-processor and a standby pre-processor, data is sent to an application server from the main pre-processor, and the standby pre-processor does not work.
When a plurality of pre-processors are adopted to simultaneously acquire remote terminal data, if the main and standby selection path data of the pre-processors are used, communication needs to be established between the pre-processors, codes are compiled or the main and standby of the pre-processors are decided by means of a third-party technology, so that the complexity of development of a data acquisition process is greatly increased; secondly, the main and standby of the pre-processor cannot represent the main and standby of the path data on the current pre-processor, and the problem that the data on the main pre-processor is not good but is still sent exists; and the pre-processor needs to communicate with each other, and decides to switch the data uploading after the main processor and the standby processor are processed logically, which inevitably consumes a certain time in the process of switching the main processor and the standby processor and the data uploading, which may cause data loss and data delay of the application server.
Disclosure of Invention
The invention aims to overcome the defects that when a plurality of pre-processors are adopted to simultaneously acquire remote terminal data in the prior art, the complexity of data acquisition process development is increased, and data loss and data delay of an application server can be caused, and provides a seamless switching mode applied to data acquired in multiple paths.
In order to achieve the purpose, the invention adopts the following technical scheme:
a seamless switching mode applied to data after multipath collection comprises N pre-processors, an application server and a remote terminal unit, wherein N is more than 2; the method comprises a data acquisition process of an x-th front-end processor, a data uploading process of the data acquisition process, a data receiving process of a data application process, and a multipath data preferential switching process of the data application process; x is 1, 2, 3, …, N;
the data acquisition process of the data acquisition process comprises the following steps:
(1-1) starting data acquisition by the data acquisition process of the xth front-end processor;
(1-2) regularly calculating the health degree Cx of the acquisition path Lx; judging whether the connection between the data acquisition process and an acquisition path Lx of the remote terminal unit is normal or not; if Lx is abnormal, trying to connect the remote terminal unit and re-executing the step (1-1); if the acquisition path Lx is normal, the step (1-3) is carried out;
(1-3) the data acquisition process starts to communicate with a remote terminal, receives and analyzes data, stores real-time data Ax, and records Ax to a change data queue if Ax is inconsistent with the data acquired and stored before the data acquisition process;
the calculation process of the acquisition path health Cx is as follows:
assuming that the data acquisition interval is 1 unit (as the case may be, for example, 1 unit is 1 second), the value Fe is the recorded value of the e-th acquisition interval unit in the last 100 acquisition interval units, and if the acquisition path Lx is abnormal, the recorded value Fe is-2; if the acquisition path Lx is normal, receiving a correct data record numerical value Fe of 1 in two acquisition interval units; the value Fe of the data record which is not received is-1; recording the value Fe of the received error data as-2, counting the sum of the recorded values of the latest 100 acquisition interval units, and dividing the recorded sum of the values by 100 to obtain the health degree of an acquisition path; wherein e is 1, 2, 3, …, 100.
Since the time delay of acquisition is considered, two acquisition interval units are selected here to receive the data record value Fe of 1, and 100 interval units are possible to record 100 values.
The preprocessors of the invention are mutually independent, do not communicate and are only responsible for data acquisition and uploading; after the application server receives the multi-path data, the data is selected and switched according to a certain algorithm and rules according to the path health degree sent by the data acquisition process, and because the multi-path data are local, the seamless switching of the path data can be realized while the data selection is completed by the data application process.
An application server: servers running various application service processes.
And (3) a data application process: and the process of data processing, data providing and other business functions is completed.
A front-end processor: and the microcomputer or the server finishes data acquisition and protocol conversion of the remote terminal and data uploading and control issuing of the application server.
And (3) data acquisition process: and completing the process of acquiring the data of the remote terminal and uploading the data to the application server.
Remote terminal unit: a special computer measuring and controlling unit with modular structure for long communication distance and bad industrial field environment is composed of a remote control center, a remote data acquisition, control and communication function, a remote control center, a remote data acquisition and communication function, and a computer.
The invention solves the problems of data optimization and dynamic seamless switching after multi-path data acquisition. A data acquisition process is deployed on the front-end processor, and a data application process is deployed on the application server. The data acquisition process on the pre-processor is connected with the remote terminal unit (the connection is called as an acquisition path) to acquire and store the data of the remote terminal unit and calculate the health degree of the uploading path according to a certain algorithm. The data collected by the data collection process on the single pre-processor is single-path data, and the data collected by the data collection processes on the plurality of pre-processors is multi-path data. And the data acquisition process sends the data and the health degree of the acquisition path to a data application process on the application server.
And the data application process on the application server receives the multi-path data on the plurality of front processors and simultaneously stores the multi-path data and the health degree in a local place. The data acquisition process and the data application process adopt a connection-oriented, safe and reliable TCP/IP protocol to ensure the safety and accuracy of data, and adopt a mode of sending all the data after connection and then changing the data to send aiming at a data transmission mode, thereby reducing the pressure of data communication on a network and improving the real-time performance of data sending. And the data application process selects the data of the acquisition path with higher health degree as a main part and the data of other acquisition paths as a standby part according to the received health degree of the acquisition path. In order to prevent the data of the acquisition path from being switched ceaselessly due to the shaking of the health degree, the program sets a health degree threshold value of 10%, and the data of the acquisition path is not switched when the current health degree is lower than the highest health degree by less than 10%. The data application process continuously selects and updates the main path data in real time, and even if the main path changes, the reselected path data can be provided for application to use locally, so that the dynamic seamless switching of the path data is realized.
Preferably, the data uploading process of the data acquisition process includes the following steps:
(2-1) starting data uploading in the data acquisition process of the xth front-end processor;
(2-2) judging whether the uploading path Yx of the data acquisition process and the data application process is normal or not; if Yx is abnormal, re-executing the step (2-1); if Yx is normal, the step (2-3) is carried out;
(2-3) uploading the data Ax and the health degree Cx of the acquisition path Lx to a data application process of an application server in the data acquisition process; and (4) re-executing the step (2-1).
Preferably, the process of receiving the data acquisition process and uploading the data by the data application process comprises the following steps:
(3-1) starting monitoring by the data application process, and receiving an uploading path Yx of the data acquisition process;
(3-2) judging whether an uploading path Yx of the data acquisition process of the xth front-end processor is received, if the uploading path Yx is not received, setting the uploading path Yx as abnormal, and executing the step (3-1) again; if the uploading path Yx is normal; transfer to step (3-3)
And (3-3) receiving and storing the data Ax and the health degree Cx of the acquisition path Lx sent by the data acquisition process, wherein the storage sequence and the structure of the Ax data in the memory are completely consistent.
Preferably, the multipath data preferential switching process of the data application process comprises the following steps:
(4-1) the data application process on the application server starts to execute multi-channel data preference;
(4-2) initializing the maximum value Cmn of the health degree to be 0%, and circularly judging whether the pre-acquisition process of the xth pre-processor and the uploading path Yx of the data application process are normal or not by the data application process; if the uploading path Yx is normal, judging whether the health degree Cx of the acquisition path Lx meets Cx & gt Cmn, and if so, judging Cmn as Cx; x is 1, 2, 3, …, N;
(4-3) in order to prevent the selection data from shaking and switching, judging whether an acquisition path has been selected before, if the acquisition path Lmo has been selected, judging whether the current acquisition path Cmo satisfies Cmo < (Cmn-10%), if so, not switching the data, and still using the data Amo as the application data, otherwise, switching the data Amn as the application data; mo is one of 1, 2, 3, … and N; mn is 1, 2, 3, …, one of N;
(4-4) because the data Amo and Amn are both stored in the local memory and the data storage sequence and structure are consistent; and the application data switching only carries out locking switching on the pointer corresponding to the data Amn, so that seamless data switching is realized.
Therefore, the invention has the following beneficial effects: the prepositive processors are mutually independent and do not communicate, and the module logic is simple and consistent and is only responsible for data acquisition and uploading; after receiving the multi-path data, the application server completes data preference and switching according to a certain algorithm and rules according to the health degree of an acquisition path sent by the data acquisition process, and because the multi-path data are stored in a local memory and the sequence and the structure of the multi-path data are consistent in the memory, the multi-path data switching only aims at locking switching of pointers corresponding to the data, so that seamless switching of the path data can be realized while the data application process completes data preference.
Drawings
FIG. 1 is a block diagram of a multi-channel data acquisition and upload system of the present invention;
FIG. 2 is a data collection process diagram of a data collection process of the present invention;
FIG. 3 is a diagram of a data uploading process of a data collection process of the present invention;
FIG. 4 is a diagram of a data receiving process of a data application process of the present invention;
FIG. 5 is a diagram of a data application process for optimizing multiple data paths.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
FIG. 1 shows a block diagram of a system for multi-channel data acquisition and uploading
Comprises 2 front processors 1, an application server 2 and a remote terminal unit 3; the method comprises a data acquisition process of an x-th front-end processor, a data uploading process of the data acquisition process, a data receiving process of a data application process, and a multipath data preferential switching process of the data application process;
the data acquisition process of the 1 st pre-processor acquires data A1 of the remote terminal unit through an acquisition path L1 and calculates the health degree C1 of the acquisition path L1, and the 1 st pre-processor is connected with the data application process of the application server through an uploading path Y1 and uploads the data A1 and the health degree C1 of the acquisition path L1;
the data acquisition process of the 2 nd pre-processor acquires the data A2 of the remote terminal unit through an acquisition path L2 and calculates the health degree C2 of the acquisition path L2, and the 2 nd pre-processor is connected with the data application process of the application server through an uploading path Y2 and uploads the data A2 and the health degree C2 of the acquisition path L2; the application server receives data a1 and health C1 of the acquisition path L1 and data a2 and health C2 of the acquisition path L2.
As shown in fig. 2, the data collection process is:
(1-1) starting data acquisition by the data acquisition process of the xth front-end processor;
(1-2) regularly calculating the health degree Cx of the acquisition path Lx; judging whether the connection between the data acquisition process and an acquisition path Lx of the remote terminal unit is normal or not; if Lx is abnormal, trying to connect the remote terminal unit and re-executing the step (1-1); if the acquisition path Lx is normal, the step (1-3) is carried out;
(1-3) the data acquisition process starts to communicate with the remote terminal unit, receives and analyzes data, stores real-time data Ax, and records Ax to a change data queue if Ax is inconsistent with the data acquired and stored before the data acquisition process;
the calculation process of the acquisition path health Cx is as follows:
assuming that the data acquisition interval is 1 unit, the numerical value Fe is the recorded numerical value of the e-th acquisition interval unit in the latest 100 acquisition interval units, and if the acquisition path Lx is abnormal, the recorded numerical value Fe is-2; if the acquisition path Lx is normal, receiving a correct data record numerical value Fe of 1 in two acquisition interval units; the value Fe of the data record which is not received is-1; recording the value Fe of the received error data as-2, counting the sum of the recorded values of the latest 100 acquisition interval units, and dividing the recorded sum of the values by 100 to obtain the health degree of the acquisition path Lx; wherein e is 1, 2, 3, …, 100.
As shown in fig. 3, the data uploading process of the data collection process:
(2-1) starting data uploading in the data acquisition process of the xth front-end processor;
(2-2) judging whether the uploading path Yx of the data acquisition process and the data application process is normal or not; if Yx is abnormal, re-executing the step (2-1); if Yx is normal, the step (2-3) is carried out;
(2-3) uploading the data Ax and the health degree Cx of the acquisition path Lx to a data application process of an application server in the data acquisition process; and (4) re-executing the step (2-1).
As shown in fig. 4, a multipath data preferential switching process is performed for the data application process:
(3-1) starting monitoring by the data application process, and receiving an uploading path Yx of the data acquisition process;
(3-2) judging whether an uploading path Yx of the data acquisition process of the xth front-end processor is received, if the uploading path Yx is not received, setting the uploading path Yx as abnormal, and executing the step (3-1) again; if the uploading path Yx is normal; transfer to step (3-3)
And (3-3) receiving and storing the data Ax and the health degree Cx of the acquisition path Lx sent by the data acquisition process, wherein the storage sequence and the structure of the Ax data in the memory are completely consistent.
As shown in FIG. 5, a process for data application to optimize data
The process of data application process multipath data preference is illustrated. The following operations are all completed in the data application process.
The multipath data preferential switching process of the data application process comprises the following steps:
(4-1) the data application process on the application server starts to execute multi-channel data preference;
(4-2) initializing the maximum value Cmn of the health degree to be 0%, and circularly judging whether the pre-acquisition process of the xth pre-processor and the uploading path Yx of the data application process are normal or not by the data application process; if the uploading path Yx is normal, judging whether the health degree Cx of the acquisition path Lx meets Cx & gt Cmn, and if so, judging Cmn as Cx; x is 1, 2, 3, …, N;
(4-3) in order to prevent the selection data from shaking and switching, judging whether an acquisition path has been selected before, if the acquisition path Lmo has been selected, judging whether the current acquisition path Cmo satisfies Cmo < (Cmn-10%), if so, not switching the data, and still using the data Amo as the application data, otherwise, switching the data Amn as the application data; mo is one of 1, 2, 3, … and N; mn is 1, 2, 3, …, one of N;
(4-4) because the data Amo and Amn are both stored in the local memory and the data storage sequence and structure are consistent; and the application data switching only carries out locking switching on the pointer corresponding to the data Amn, so that seamless data switching is realized.
It should be understood that this example is for illustrative purposes only and is not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.

Claims (4)

1. A seamless switching mode applied to data after multipath collection is characterized by comprising N pre-processors (1), an application server (2) and a remote terminal unit (3), wherein N is more than 2; the method comprises a data acquisition process of an x-th front-end processor, a data uploading process of the data acquisition process, a data receiving process of a data application process, and a multipath data preferential switching process of the data application process; x is 1, 2, 3, …, N;
the data acquisition process of the data acquisition process comprises the following steps:
(1-1) starting data acquisition by the data acquisition process of the xth front-end processor;
(1-2) regularly calculating the health degree Cx of the acquisition path Lx; judging whether the connection between the data acquisition process and an acquisition path Lx of the remote terminal unit is normal or not; if Lx is abnormal, trying to connect the remote terminal unit and re-executing the step (1-1); if the acquisition path Lx is normal, the step (1-3) is carried out;
(1-3) the data acquisition process starts to communicate with the remote terminal unit, receives and analyzes data, stores real-time data Ax, and records Ax to a change data queue if Ax is inconsistent with the data acquired and stored before the data acquisition process;
the calculation process of the acquisition path health Cx is as follows:
assuming that the data acquisition interval is 1 unit, the numerical value Fe is the recorded numerical value of the e-th acquisition interval unit in the latest 100 acquisition interval units, and if the acquisition path Lx is abnormal, the recorded numerical value Fe is-2; if the acquisition path Lx is normal, receiving a correct data record numerical value Fe of 1 in two acquisition interval units; the value Fe of the data record which is not received is-1; recording the value Fe of the received error data as-2, counting the sum of the recorded values of the latest 100 acquisition interval units, and dividing the recorded sum of the values by 100 to obtain the health degree of the acquisition path Lx; wherein e is 1, 2, 3, …, 100.
2. The seamless switching mode applied to the data after multipath collection as claimed in claim 1, wherein the data uploading process of the data collection process comprises the following steps:
(2-1) starting data uploading in the data acquisition process of the xth front-end processor;
(2-2) judging whether the uploading path Yx of the data acquisition process and the data application process is normal or not; if Yx is abnormal, re-executing the step (2-1); if Yx is normal, the step (2-3) is carried out;
(2-3) uploading the data Ax and the health degree Cx of the acquisition path Lx to a data application process of an application server in the data acquisition process; and (4) re-executing the step (2-1).
3. The seamless switching mode applied to the data after multipath collection as claimed in claim 1, wherein the process of receiving the data collection process and uploading the data by the data application process comprises the following steps:
(3-1) the data application process starts monitoring and receives an uploading path Yx of the data acquisition process:
(3-2) judging whether an uploading path Yx of the data acquisition process of the xth front-end processor is received, if the uploading path Yx is not received, setting the uploading path Yx as abnormal, and executing the step (3-1) again; if the uploading path Yx is normal; transfer to step (3-3)
And (3-3) receiving and storing the data Ax and the health degree Cx of the acquisition path Lx sent by the data acquisition process, wherein the storage sequence and the structure of the Ax data in the memory are completely consistent.
4. The seamless switching mode applied to the data after multi-path collection as claimed in claim 1, wherein the data application process multi-path data preferential switching process comprises the following steps:
(4-1) the data application process on the application server starts to execute multi-channel data preference;
(4-2) initializing the maximum value Cmn of the health degree to be 0%, and circularly judging whether the pre-acquisition process of the xth pre-processor and the uploading path Yx of the data application process are normal or not by the data application process; if the uploading path Yx is normal, judging whether the health degree Cx of the acquisition path Lx meets Cx & gt Cmn, and if so, judging Cmn as Cx; x is 1, 2, 3, …, N;
(4-3) in order to prevent the selection data from shaking and switching, judging whether an acquisition path has been selected before, if the acquisition path Lmo has been selected, judging whether the current acquisition path Cmo satisfies Cmo < (Cmn-10%), if so, not switching the data, and still using the data Amo as the application data, otherwise, switching the data Amn as the application data; mo is one of 1, 2, 3, … and N; mn is 1, 2, 3, …, one of N;
(4-4) because the data Amo and Amn are both stored in the local memory and the data storage sequence and structure are consistent; and the application data switching only carries out locking switching on the pointer corresponding to the data Amn, so that seamless data switching is realized.
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