CN105119951B - A kind of data distribution service communication means - Google Patents
A kind of data distribution service communication means Download PDFInfo
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- CN105119951B CN105119951B CN201510365782.3A CN201510365782A CN105119951B CN 105119951 B CN105119951 B CN 105119951B CN 201510365782 A CN201510365782 A CN 201510365782A CN 105119951 B CN105119951 B CN 105119951B
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Abstract
The present invention relates to a kind of data distribution service communication means, firstly generate publisher and subscriber, the data type of needs is sent to Data subject generation module by described subscriber, described Data subject generation module is that publisher sets up Data subject according to the data type that described subscriber needs, the type of described Data subject includes remote measurement, remote signalling, remote measurement sequence and remote signalling sequence, when described subscriber once needs individual data, then set up remote measurement or remote signalling data theme for publisher；When described subscriber once needs multiple data, then set up remote measurement sequence or remote signalling sequence data theme for publisher；This subscribing manner not only increases efficiency of transmission, and subscriber is possible not only to once subscribe to all remote measurements of certain circuit, can also once subscribe to the specific remote measurement of all circuits to compare maximum, motility is added for transmission means, solve and prior art once can only be transmitted data cause transmitting relatively slow, the problem under efficiency.
Description
The application is divisional application, and parent application number is
201410019671.2
, parent application day is
2014-01-16
。
Technical field
The present invention relates to a kind of communication means, specifically a kind of field of distribution network DDS communication means, belong to communication technical field.
Background technology
Data distribution service (Data Distribution Service, DDS) it is a latest specification of data publication in the distributed real-time systems promulgated of OMG (OMG), this specification describes data publication in distributed real-time systems, the interface transmitting and receiving and behavior, defines data-centered Publish-subscribe (Data-Centric
Publish-Subscribe, DCPS) mechanism, provide one and platform-independent data model.It allows its information having of application program real-time release, and subscribes to its information needed, and has preferably processed the problems such as automatically the finding of data in unreliable network communication, reliability and redundancy.Aiming at of DDS promotes data efficient in distributed system, reliably distributes.
Based on DDS Chinese invention patent 103166975A " a kind of DDS communication system " discloses a kind of DDS communication system, which employs publish/subscribe communication pattern, including some publishers, some subscribers, some middlewares, log-on data type block, generate topic module, issue data module, lookup topic module, topic of subscription module, reception data module；First one publisher calls described log-on data type block, returns after success；Then call described generation topic module, middleware generates theme；One subscriber finds theme by searching described topic module on network, then calls described topic of subscription module and subscribes to this theme；When described publisher receives topic of subscription word, calling described issue data module, data delivered on described middleware, described subscriber receives this data by described reception data module on described middleware.
But this invention also leaves some room for improvement, this Data subject once can only transmit one, if to obtain the electric current of certain circuit, voltage, three values of frequency in power distribution network is applied, the electric current of this circuit, voltage and frequency need to be subscribed to respectively, publisher needs to issue these themes corresponding in three times, the time not only used is more, the data received must be collected arrangement and could obtain the information wanted, inefficient.
Summary of the invention
The technical problem to be solved is that in DDS of the prior art communication, Data subject once can only transmit one and causes the relatively slow problem of transmission speed, thus provides the field of distribution network DDS communication means of a kind of particular data theme that can disposably transmit any many quantity
For solving above-mentioned technical problem, the present invention is achieved by the following technical solutions:
A kind of field of distribution network DDS communication means, comprises the following steps:
(1) data publication side and subscriber are set up:
Set up the publisher of issue object by generating release module, it has the function writing data；
Set up the subscriber of subscription object by generating subscribing module, it has the function reading data；
(2) set up and configure Data subject:
The data type of needs is sent to Data subject generation module by described subscriber, described Data subject generation module is that publisher sets up Data subject according to the data type that described subscriber needs, the type of described Data subject includes remote measurement, remote signalling, remote measurement sequence and remote signalling sequence, when described subscriber once needs individual data, the most described Data subject generation module to be that publisher sets up remote measurement or remote signalling data theme；When described subscriber once needs multiple data, the most described Data subject generation module to be that publisher sets up remote measurement sequence or remote signalling sequence data theme；
(3) issue and subscribe to Data subject:
Data subject generation module by the configuration information of Data subject set up to publisher, the configuration information of publisher's real-time update Data subject externally issue latest data theme；Subscriber's monitored data passage, when finding the configuration information of Data subject of needs, obtains this Data subject in real time from the publisher of this Data subject configuration information, and parses this data according to the type of this Data subject.
Described remote measurement refers to the data volume for transmission line detection, and described remote signalling refers to the data volume of the actuating signal of the position signalling for transmitting switch, protection device；Remote measurement sequence transmits any number of remote measurements for disposable；Described remote signalling sequence transmits any number of remote signalling for disposable.
Described publisher is connected with data providing, and data set provider provides data, described subscriber to be connected with digital independent side for it, and described digital independent person reads the data of described subscriber.
Described data providing is FTU/DTU, and described digital independent side is SCADA system.
Each Data subject includes two essential informations: the ID of data identifies and measures title.
Also include the communication control parameters that described Data subject is set by XML file.
Realize controlling data content and communication quality in data transmission procedure by arranging described communication control parameters.
Described communication control parameters is set to: if it occur that data jamming in communication process, occur the data blocked to be repeatedly transmitted some times.
Described communication control parameters is set to: if it occur that data jamming in communication process, ignore the data of obstruction, continues to send information below.
Described publisher and subscriber can generate multiple, and multiple described subscribers can subscribe to same publisher simultaneously.
The technique scheme of the present invention has the advantage that compared to existing technology
(1) field of distribution network DDS communication means of the present invention, the data type of needs is sent to Data subject generation module by described subscriber, described Data subject generation module is that publisher sets up Data subject according to the data type that described subscriber needs, the type of described Data subject includes remote measurement, remote signalling, remote measurement sequence and remote signalling sequence, when described subscriber once needs individual data, the most described Data subject generation module to be that publisher sets up remote measurement or remote signalling data theme；When described subscriber once needs multiple data, the most described Data subject generation module to be that publisher sets up remote measurement sequence or remote signalling sequence data theme；If prior art such as being wanted three data must distinguish distribution subscription three times, three data can be set up a sequence by this method, subscriber subscribes to this sequence just can three data of a winner, therefore efficiency of transmission is not only increased, and substantial amounts of data can be packaged into sequence transmission, the requirements for access of large-scale real time data can be met, there is efficient performance, and subscriber is possible not only to once subscribe to all remote measurements of certain circuit, can also once subscribe to the specific remote measurement of all circuits to compare maximum, motility is added for transmission means, solve and prior art once can only be transmitted data cause transmitting slower, problem under efficiency.
(2) field of distribution network DDS communication means of the present invention, described remote measurement refers to the data volume for transmission line detection, and described remote signalling refers to the data volume of the actuating signal of the position signalling for transmitting switch, protection device；Remote measurement sequence transmits any number of remote measurements for disposable；Described remote signalling sequence transmits any number of remote signalling for disposable, the signal of circuit carries out classification and is conducive to subscribing to easily and issuing, and subscriber is by subscribing to the theme of a remote measurement sequence, it is possible to obtain the information such as the voltage of a circuit, electric current and frequency.
(3) field of distribution network DDS communication means of the present invention, described publisher is FTU/DTU, described subscriber is SCADA system, be used in combination concrete with field of distribution network of the present invention, different according to each application function, the development efficiency of 2-4 times can be improved, economize on resources, reduce development and maintenance cost.
(4) field of distribution network DDS communication means of the present invention, also include the communication control parameters QoS that described Data subject is set by XML file, in data transmission procedure, data content and communication quality is controlled by arranging described communication control parameters, communication process sends and extremely can solve by communication control parameters QoS is arranged, various service strategy can be configured flexibly, it is ensured that reliability.
(5) field of distribution network DDS communication means of the present invention, is set to described communication control parameters: if it occur that data jamming in communication process, occur the data blocked to be repeatedly transmitted some times.
Described communication control parameters is set to: if it occur that data jamming in communication process, ignore the data of obstruction, continues to send information below；When making, in communication process, data jamming occurs, according to the parameter of service quality, the data occurring to block can be allowed to be repeatedly transmitted some times, meet the high reliability of data, the data of obstruction can also be ignored, continue to send information below, to meet higher requirement of real-time.
(6) field of distribution network DDS communication means of the present invention, described publisher and subscriber can generate multiple, and multiple described subscribers can subscribe to same publisher simultaneously, provide more choices in the application for this method and possible, and the suitability is higher.
Accompanying drawing explanation
In order to make present disclosure be more likely to be clearly understood, below in conjunction with the accompanying drawings, the present invention is further detailed explanation, wherein,
Fig. 1 is the communication structure figure of the first embodiment of field of distribution network DDS communication means of the present invention；
Fig. 2 is the method flow diagram of field of distribution network DDS communication means of the present invention；
Fig. 3 is the communication structure figure of the second embodiment of field of distribution network DDS communication means of the present invention；
Fig. 4 is the topic parameter structure chart of field of distribution network DDS communication means of the present invention.
Detailed description of the invention
Provide below the detailed description of the invention of field of distribution network DDS communication means of the present invention.
Embodiment
1
Field of distribution network DDS communication means of the present invention, as in figure 2 it is shown, comprise the steps:
(1) data publication side and subscriber are set up:
Set up the publisher of issue object by generating release module create_publisher () interface, it has the function writing data；
Set up the subscriber of subscription object by generating subscribing module create_subscriber () interface, it has the function reading data.
(2) set up and configure Data subject:
The data type of needs is sent to Data subject generation module create_topic () interface by described subscriber, described Data subject generation module create_topic () interface is that publisher sets up Data subject according to the data type that described subscriber needs, and the type of described Data subject includes remote signalling MVTDiscreteValue, remote measurement MVTAnalogValue, remote signalling sequence MVSTDiscreteValue, remote measurement sequence MVSTAnalogValue.
When described subscriber once needs individual data, the most described Data subject generation module create_topic () interface to be that publisher sets up remote measurement or remote signalling data theme；When described subscriber once needs multiple data, the most described Data subject generation module create_topic () interface to be that publisher sets up remote measurement sequence or remote signalling sequence data theme.
(3) issue and subscribe to Data subject:
Data subject generation module create_topic () interface by the configuration information of Data subject set up to publisher, the configuration information of publisher's real-time update Data subject externally issue latest data theme；Subscriber's monitored data passage, when finding the configuration information of Data subject of needs, obtains this Data subject in real time from the publisher of this Data subject configuration information, and parses this data according to the type of this Data subject, the final communication structure set up as shown in Figure 1.
If prior art such as being wanted three data must distinguish distribution subscription three times, three data can be set up a sequence by this method, subscriber subscribes to this sequence just can three data of a winner, therefore efficiency of transmission is not only increased, and substantial amounts of data can be packaged into sequence transmission, the requirements for access of large-scale real time data can be met, there is efficient performance, and subscriber is possible not only to once subscribe to all remote measurements of certain circuit, can also once subscribe to the specific remote measurement of all circuits to compare maximum, motility is added for transmission means, solve and prior art once can only be transmitted data cause transmitting slower, problem under efficiency.
Embodiment
2
On the basis of the field of distribution network DDS communication means described in embodiment 1, described remote measurement is the data volume for transmission line detection；Described remote signalling refers to the data volume of the actuating signal of the position signalling for transmitting switch, protection device；Remote measurement sequence transmits any number of remote measurements for disposable；Described remote signalling sequence transmits any number of remote signalling for disposable.
As it is shown on figure 3, described publisher is FTU/DTU, FTU(Feeder Terminal
Unit), Feeder Terminal Unit, FTU is to be installed in the monitoring switch device that feeder switch is other, and these feeder switches refer to the on-pole switch of open air, such as chopper on 10kV circuit, on-load switch, block switch etc..On-pole switch is monitored by FTU, transmits service data in real time.DTU(Data Terminal unit), switching station terminal equipment, DTU is typically mounted at the switching station of routine, outdoor small-sized switching station, ring main unit, Small Substation, box-type substation etc., complete collection and the calculating of the data such as the position signalling of switching devices, voltage, electric current, active power, power factor, switch is carried out breaking-closing operating, Monitoring Data can be sent to distribution substation, a distant place by FTU and DTU, completes remote measurement, remote control, remote signalling, fault detection capability；In actual applications, publisher can also is that other data acquisition facility, described subscriber pass through IEC61970
The SCADA system that DAIS service interface connects, DAIS(Data Acquisition for Industrial Systems) interface, it is for transmitting the service interface that high-volume data provide general efficiently and in real time, it supports that parameter automatically finds and updates, describe the interface of data access, alarm and event, it is adaptable to high-speed data accesses；SCADA(Supervisory Control And Data Acquisition) system, i.e. data acquisition and supervisor control.SCADA system is used for on-the-spot operation equipment is monitored and controlled, the function such as including data acquisition, four distant (remote signalling, remote measurement, remote control, remote regulating), Stateful Inspection, warning, sequence of events recording, statistical computation, tabulation printing.
Each Data subject includes two essential informations: the ID of data identifies and measures title；The measurement title of described Data subject and ID mark are put in specific Data subject type.
Such as, certain is measured " substation/PMC680PQM/QVVR0.stVal " and represents voltage, this measurement title and its id are identified in the type of theme being put into remote measurement MVTAnalogValue, it may be assumed that MVTAnalogValue{ " substation/PMC680PQM/QVVR0.
StVal ": " 8000,2416000004085,5000,12110 " }；When the data that subscriber's DAIS service discovery receives are MVTAnalogValue types, just know reception is remote measurement, and extracts this data according to its analysis mode.
Embodiment
3
On the basis of the field of distribution network DDS communication means described in above example, as shown in Figure 4, also include the communication control parameters QoS that described Data subject is set by XML file, this qos parameter is defined in XML Schema, add/remove certain qos parameter, have only to increase/delete in XML Schema this parameter, it is achieved that the motility of configuration.
Service quality control parameter topic_qos of such as theme, it is used for controlling the contents such as the reliability of data, holding time, is made up of some design parameters.Wherein parameter DEADLINE represents data renewal frequency, assuming that publisher arranges this parameter is 5 seconds, represent that its every five seconds for example updates a secondary data and externally issues, if it is 3 seconds that subscriber arranges this parameter, represent that it is to update once for every 3 seconds the frequency requirement that data update, and publisher can not meet this requirement, then correspondence is caused to set up.
Another parameter HISTORY represents historical data, its value can be KEEP_LAST or KEEP_ALL, when value KEEP_LAST, after once subscriber sets up with publisher and is connected, publisher is i.e. sent to the data value (degree of depth of parameter depth control most recent value of recent renewal, if 5, then send nearest 5 data value), even if this value updates before connection establishment.When value KEEP_ALL, once set up connection, issue direction subscriber and send all historical datas.
In data transmission procedure, control data content and communication quality by arranging described communication control parameters, described communication control parameters is set to: if it occur that data jamming in communication process, occur the data blocked to be repeatedly transmitted some times.Or described communication control parameters is set to: if it occur that data jamming in communication process, ignore the data of obstruction, continue to send information below, when making, in communication process, data jamming occurs, parameter according to service quality, the data occurring to block can be allowed to be repeatedly transmitted some times, meet the high reliability of data, parameter RELIABILITY represents reliability, if data are blocked, then resend these data, the data of obstruction can also be ignored, continue to send information below, to meet higher requirement of real-time, parameter max_blocking_time can arrange the maximum time allowing to block, on duty when being 5 seconds, as long as representing more than the data the most no longer retransmitting obstruction for 5 seconds, and continue the data sent below.
Described publisher and subscriber can generate multiple, and in actual applications, publisher and subscriber can be along with system changeovers, so described publisher and subscriber can add on the basis of original, can also be brand-new, there is more preferable adaptability, adapt to the renewal of system；Multiple described subscribers can subscribe to same publisher simultaneously, and making the data of one-shot measurement be issued by publisher in the application can provide multiple system to use, it is to avoid repeated measure, improves efficiency.
Obviously, above-described embodiment is only for clearly demonstrating example, and not restriction to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here without also cannot all of embodiment be given exhaustive.And the obvious change thus extended out or variation still in the protection domain of the invention among.
Claims (4)
1. a data distribution service communication means, it is characterised in that comprise the following steps:
(1) data publication side and subscriber are set up:
Setting up issue the publisher of object by generating release module, described publisher has and writes data
Function；
Set up the subscriber of subscription object by generating subscribing module, described subscriber has reading data
Function；
(2) set up and configure Data subject:
The data type of needs is sent to Data subject generation module, described data master by described subscriber
Topic generation module is that publisher sets up Data subject according to the data type that described subscriber needs, described
The type of Data subject includes remote measurement, remote signalling, remote measurement sequence and remote signalling sequence, and described remote measurement refers to use
In the data volume of transmission line detection, described remote signalling refers to the position signalling for transmitting switch, protection
The data volume of the actuating signal of device；Remote measurement sequence transmits any number of remote measurements for disposable；Described
Remote signalling sequence transmits any number of remote signalling for disposable；When described subscriber once needs individual data,
The most described Data subject generation module is that publisher sets up remote measurement or remote signalling data theme；When described subscription
Fang Yici needs multiple data, the most described Data subject generation module be publisher set up remote measurement sequence or
Remote signalling sequence data theme；
(3) issue and subscribe to Data subject:
Data subject generation module is by the configuration information of the Data subject of foundation to publisher, and publisher is real
The configuration information of Shi Gengxin Data subject externally issue latest data theme；Subscriber's monitored data leads to
Road, when finding the configuration information of Data subject of needs, from the publisher of this Data subject configuration information
Obtain this Data subject in real time, and parse this data according to the type of this Data subject；Pass through XML
File arranges the communication control parameters of described Data subject, realizes by arranging described communication control parameters
Data content and communication quality is controlled in data transmission procedure.
Method the most according to claim 1, it is characterised in that described communication control parameters is set
It is set to: if it occur that data jamming in communication process, occur the data blocked to be repeatedly transmitted some
Time.
Method the most according to claim 2, it is characterised in that described communication control parameters is set
It is set to: if it occur that data jamming in communication process, ignore the data of obstruction, continue after transmission
Information.
4. according to the method described in any one of claim 1-3, it is characterised in that described publisher and
The generation quantity of described subscriber is multiple, and multiple described subscribers can subscribe to same institute simultaneously
State publisher.
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| CN201510365782.3A CN105119951B (en) | 2014-01-16 | 2014-01-16 | A kind of data distribution service communication means |
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|---|---|---|---|
| CN201510365782.3A CN105119951B (en) | 2014-01-16 | 2014-01-16 | A kind of data distribution service communication means |
| CN201410019671.2A CN103731504B (en) | 2014-01-16 | 2014-01-16 | Field of distribution network DDS communication means |
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| CN201510365782.3A Active CN105119951B (en) | 2014-01-16 | 2014-01-16 | A kind of data distribution service communication means |
| CN201510365609.3A Active CN105119950B (en) | 2014-01-16 | 2014-01-16 | A kind of Distribution Network Communication method |
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| CN104201778A (en) * | 2014-08-22 | 2014-12-10 | 国家电网公司 | Method for improving quality of service in data transmission of power distribution network |
| CN105139270A (en) * | 2015-08-06 | 2015-12-09 | 国电南瑞科技股份有限公司 | DDS standard based design method for real-time data service of power grid regulation system |
| CN105138339A (en) * | 2015-09-10 | 2015-12-09 | 中国航空无线电电子研究所 | Distributed communication midware developing method based on DDS standard |
| US10814893B2 (en) | 2016-03-21 | 2020-10-27 | Ge Global Sourcing Llc | Vehicle control system |
| US10205784B2 (en) | 2016-03-21 | 2019-02-12 | General Electric Company | Communication system and method for controlling data distribution quality of service in time sensitive networks |
| US10979506B2 (en) * | 2016-09-19 | 2021-04-13 | Westinghouse Air Brake Technologies Corporation | Vehicle control system |
| US11072356B2 (en) | 2016-06-30 | 2021-07-27 | Transportation Ip Holdings, Llc | Vehicle control system |
| CN107733839B (en) * | 2016-08-11 | 2021-06-01 | 北京百度网讯科技有限公司 | Data transmission method and system |
| CN106656658A (en) * | 2016-11-17 | 2017-05-10 | 许继集团有限公司 | Substation information pushing system |
| CN107317802A (en) * | 2017-06-06 | 2017-11-03 | 中国电子信息产业集团有限公司第六研究所 | A kind of generating date dissemination system based on SOA and DDS |
| CN109635311A (en) * | 2018-10-24 | 2019-04-16 | 中国电子科技集团公司第二十八研究所 | A kind of l-G simulation test data collection system based on DDS |
| CN109547243B (en) * | 2018-11-16 | 2021-12-03 | 南京华讯方舟通信设备有限公司 | DDS-based cross-network-segment communication method |
| CN109889597A (en) * | 2019-03-04 | 2019-06-14 | 国网浙江省电力有限公司 | A method of power network monitoring resource publish/subscribe and recommendation based on information sharing platform |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN105119950A (en) | 2015-12-02 |
| CN103731504B (en) | 2015-11-18 |
| CN105119950B (en) | 2016-08-17 |
| CN105119951A (en) | 2015-12-02 |
| CN103731504A (en) | 2014-04-16 |
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