CN1293712C - Transmission method of control message in monitoring system - Google Patents
Transmission method of control message in monitoring system Download PDFInfo
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- CN1293712C CN1293712C CNB021441197A CN02144119A CN1293712C CN 1293712 C CN1293712 C CN 1293712C CN B021441197 A CNB021441197 A CN B021441197A CN 02144119 A CN02144119 A CN 02144119A CN 1293712 C CN1293712 C CN 1293712C
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Abstract
The present invention discloses a transmission method of a control message in a monitoring system. The present invention is characterized in that the present invention comprises the following steps: control messages generated by a node is encapsulated into a communication message, the communication message is composed of a communication frame header and the control messages, and a plurality of control messages are encapsulated in a communication message; the communication message is transferred to the communication control layer of a peer node; the communication control layer of the peer receives and parses the communication message, restores the control messages from the communication message, and transfers the control messages to the application control layer of the peer. By using the proposal, a plurality of control messages are encapsulated in one communication message, so that the relative ratio of the communication frame header in the communication message is reduced, the carrying efficiency of the communication message is improved, and the problem that the propagation efficiency of the control messages among a plurality of devices in a monitoring network is low is solved.
Description
Technical field:
The present invention relates to the transmission method of control message in a kind of supervisory control system.
Background technology:
In the typical supervisory control system network, the communication structure between two communication equipments as shown in Figure 1.Each node in the system (control desk or monitored equipment) all exists application controls layer and two part of Control on Communication layer.Wherein the application controls layer is realized the function of application, as user interface, and the transmission of monitor command and reception or the like.Carry out information interaction and collaborative by the control message between the application controls layer between the different nodes, thereby realize that control is with controlled.
Control message between the different nodes can not directly be transmitted on the application controls layer, and must be by the Control on Communication layer.The Control on Communication layer is responsible for the transmission of specific implementation control message between different nodes, and particularly, the control message that this node is produced is packaged into communication message, is delivered to the Control on Communication layer of peer node; Perhaps the Control on Communication layer from equity receives and the parsing communication message, and therefrom recovers the control message, passes to the application controls layer of this node.Undertaken alternately by communication message between the Control on Communication layer, it consists of the communication frame head and adds the control message.
In existing Control on Communication layer protocol design, generally adopt the mode of the corresponding control message of a communication message, the mode of this encapsulation has control simple, the advantage that is easy to realize.But can there be the low problem of communication efficiency.Especially in the supervisory control system network, the message of various control usefulness all shorter and smaller (1～100Bytes), comparatively speaking, the proportion that the communication frame head occupies in communication message is big (as using ICP/IP protocol as communication protocol, then the frame head expense of each communication message is more than the 54Bytes), thereby a large amount of network bandwidths all is used on the non-effective information of transmission, has a strong impact on the transfer rate of control message.
Summary of the invention:
Purpose of the present invention is exactly in order to overcome the above problems, and the transmission method of control message in the supervisory control system is provided, and improves the load-carrying efficiency of communication message.
For achieving the above object, the present invention proposes the transmission method of control message in a kind of supervisory control system, it is characterized in that comprising the steps: a plurality of control messages of producing according to this node, in communication message, set gradually following territory: the control message of communication frame head and corresponding number, a plurality of control messages that this node is produced are encapsulated in the communication message; Communication message is delivered to the Control on Communication layer of peer node; The Control on Communication layer of peer node receives and resolves communication message, and therefrom recovers the control message, passes to the application controls layer of this node.
Owing to adopted above scheme, a plurality of control messages have been encapsulated in the communication message, thereby reduced the relative proportion of communication frame head in communication message, improve the load-carrying efficiency of communication message, solved the low problem of propagation efficiency of in monitor network, controlling message between a plurality of equipment.
Description of drawings:
Fig. 1 is the communication structure schematic diagram of existing general monitor network.
Fig. 2 is the communication structure schematic diagram after the present invention improves.
Fig. 3 is the protocol architecture schematic diagram that can encapsulate a plurality of control messages.
Embodiment:
Also the present invention is described in further detail in conjunction with the accompanying drawings below by specific embodiment.
See Fig. 2, as we can see from the figure, improve in the later Control on Communication layer protocol, encapsulated a plurality of control messages in the communication message, thereby reduced the relative proportion of communication frame head in communication message, improved the load-carrying efficiency of communication message.
For a plurality of control messages are encapsulated in the communication message, designed following communication control processor, its structure is as shown in Figure 3.
Wherein " underlying protocol frame head " territory is different because of different basic communication protocols, as the Ethernet protocol frame head, and ICP/IP protocol frame head or the like.
" control message number " territory has indicated the number of the control message that comprises altogether in this communication message.The length in this territory will determine the maximum number of the control message that comprises in the communication message.
In order from communication message, accurately to locate and recover a plurality of control messages, in each control message, boundary and locating information have been increased.
Wherein " start of heading sign " indicated the beginning of each control message.Specific value of general agreement is filled this information field between the communication equipment.
The total length (containing two information fields of " start of heading sign " and " control message length ") of this control message has been indicated in " control message length " territory, and the bit wide in this territory selects to want can enough represent to control the maximum length that message may occur.
What carry in " control message content " territory will be the control message content of actual needs transmission.
Because the randomness of control content of message wherein may occur and " start of heading sign " identical field of thresholding.Therefore it is not enough only relying on " start of heading sign " to locate each control message.To accurately locate and respectively control message, also need to utilize " control message length " territory, use " chain type positioning mode " to finish.
The process that " chain type positioning mode " carries out is: at first find first control start of heading sign in the communication message, because each communication message frame head length is certain, first position of controlling start of heading also should be fixed; By the starting position of first control message and the length of this message, we can locate the starting position of second control message.Whether the content of checking this position is " start of heading sign " value of agreement.If then expression is resolved correctly, can use the same method and continue to resolve follow-up control message.If not, then represent parse error, need to stop resolving.Under the right-on situation of message transmissions,, can decomposite all control message structures in the communication message fully with this kind " chain type positioning mode ".
As seen, the present invention has realized a plurality of control messages are encapsulated in the communication message, and can recover a plurality of control messages exactly at receiving terminal by the communication frame head and the sub-message locating information of appropriate design.This kind method is compared with general method, and communication efficiency improves greatly.In the supervisory control system network, when the Content of Communication of a plurality of nodes when being main with short message, when perhaps the Network Transmission bandwidth became system bottleneck, this kind method improvement effect was very obvious.
In certain experimental system, we utilize a control desk that the equipment of a plurality of test usefulness is managed and monitors, control message between control desk and the controlled device has adopted method of the present invention to encapsulate, the result has improved communication efficiency greatly, and the configuration management speed of control desk and the response speed of control command are obviously improved.
Claims (6)
1, the transmission method of control message in the supervisory control system is characterized in that comprising the steps:
A plurality of control messages according to this node produces set gradually following territory in communication message: the control message of communication frame head and corresponding number, and a plurality of control messages that this node is produced are encapsulated in the communication message;
Communication message is delivered to the Control on Communication layer of peer node;
The Control on Communication layer of peer node receives and resolves communication message, and therefrom recovers the control message, passes to the application controls layer of this node.
2, the transmission method of control message in the supervisory control system as claimed in claim 1 is characterized in that: also be provided with in described communication message: a control message number field.
3, the transmission method of control message in the supervisory control system as claimed in claim 2 is characterized in that: increasing in the control message has boundary and locating information.
4, as the transmission method of control message in claim 2 or the 3 described supervisory control systems, it is characterized in that: described communication frame head is the underlying protocol frame head, specifically can be Ethernet protocol frame head or ICP/IP protocol frame head.
5, the transmission method of control message in the supervisory control system as claimed in claim 3 is characterized in that: described boundary and locating information are to indicate start of heading and the control message length.
6, the transmission method of control message in the supervisory control system as claimed in claim 5, it is characterized in that: each control method of message of location is the chain type positioning mode in communication message, and its process is: at first find first control start of heading sign in the communication message; By the starting position of first control message and the length of this message, locate the starting position of second control message; Whether the content of checking this position is " the start of heading sign " of agreement; If then expression is resolved correctly, can use the same method and continue to resolve follow-up control message; If not, then represent parse error, need to stop resolving.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021441197A CN1293712C (en) | 2002-09-28 | 2002-09-28 | Transmission method of control message in monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021441197A CN1293712C (en) | 2002-09-28 | 2002-09-28 | Transmission method of control message in monitoring system |
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| Publication Number | Publication Date |
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| CN1485997A CN1485997A (en) | 2004-03-31 |
| CN1293712C true CN1293712C (en) | 2007-01-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB021441197A Expired - Fee Related CN1293712C (en) | 2002-09-28 | 2002-09-28 | Transmission method of control message in monitoring system |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101616149B (en) * | 2009-07-23 | 2012-08-08 | 成都市华为赛门铁克科技有限公司 | Information processing method, device and information transmission system |
| CN101945026B (en) * | 2010-06-30 | 2013-08-07 | 艾默生网络能源有限公司 | Data transmission method of application layer in control area network and control area network system |
| CN103729189B (en) * | 2013-12-31 | 2017-01-04 | 福建星网锐捷通讯股份有限公司 | Broadcasting method for converting protocol based on LUA, system, terminal |
| CN106194639A (en) * | 2016-07-12 | 2016-12-07 | 上海理工大学 | A kind of multitube tapering type variable cross-section airlift pump |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1128933A (en) * | 1994-07-11 | 1996-08-14 | 阿尔卡塔尔有限公司 | Transcoder-base station interface upstream frames in a cellular radio communication network using a mobile system |
| WO2001006728A1 (en) * | 1999-07-14 | 2001-01-25 | Wuhan Research Institute Of Posts And Telecommunications, M.I.I. | Data transmission apparatus and method for transmitting data between physical layer side device and network layer device |
-
2002
- 2002-09-28 CN CNB021441197A patent/CN1293712C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1128933A (en) * | 1994-07-11 | 1996-08-14 | 阿尔卡塔尔有限公司 | Transcoder-base station interface upstream frames in a cellular radio communication network using a mobile system |
| WO2001006728A1 (en) * | 1999-07-14 | 2001-01-25 | Wuhan Research Institute Of Posts And Telecommunications, M.I.I. | Data transmission apparatus and method for transmitting data between physical layer side device and network layer device |
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| CN1485997A (en) | 2004-03-31 |
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Owner name: HUAWEI ANSETT ELECTRONICS CO., LTD., SHENZHEN CIT Free format text: FORMER OWNER: HUAWEI TECHNOLOGY CO., LTD. Effective date: 20081024 |
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Effective date of registration: 20081024 Address after: No. 2, building B, HUAWEI base, Longgang District, Shenzhen, Bantian Patentee after: Shenzhen Huawei Anjiexin Electrical Co., Ltd. Address before: Guangdong Shenzhen science and Technology Park HUAWEI road user service center building intellectual property department Patentee before: Huawei Technologies Co., Ltd. |
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