CN107809765B - Equipment networking system and communication method based on same - Google Patents
Equipment networking system and communication method based on same Download PDFInfo
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- CN107809765B CN107809765B CN201710931062.8A CN201710931062A CN107809765B CN 107809765 B CN107809765 B CN 107809765B CN 201710931062 A CN201710931062 A CN 201710931062A CN 107809765 B CN107809765 B CN 107809765B
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- 230000006854 communication Effects 0.000 title claims abstract description 119
- 238000004891 communication Methods 0.000 title claims abstract description 118
- 230000006855 networking Effects 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000012790 confirmation Methods 0.000 claims description 7
- 208000033748 Device issues Diseases 0.000 claims description 4
- 230000002776 aggregation Effects 0.000 claims 1
- 238000004220 aggregation Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 4
- 230000000737 periodic effect Effects 0.000 abstract description 4
- 230000005540 biological transmission Effects 0.000 description 3
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C19/00—Electric signal transmission systems
- G08C19/30—Electric signal transmission systems in which transmission is by selection of one or more conductors or channels from a plurality of conductors or channels
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/403—Bus networks with centralised control, e.g. polling
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Abstract
The invention provides a device networking system and a method for communication based on the system, wherein the system comprises: a data concentration device, one or more node devices, wherein: the data concentration equipment is provided with a first communication module and a second communication module; the data concentration device is in polling communication with the node device through the first communication module, and receives data actively uploaded by the node device through the second communication module. By means of the method, the technical problem that the existing node equipment cannot effectively upload the alarm information to the data concentration equipment is solved, and the technical effect of transmitting the periodic data and the burst data is achieved.
Description
Technical Field
The invention relates to the technical field of equipment processing, in particular to an equipment networking system and a method for carrying out communication based on the system.
Background
At present, a general networking system is composed of a data concentrator and a plurality of node devices, then the data concentrator performs real-time polling communication on the plurality of node devices, and transceivers all perform communication at the same frequency point.
However, if a node device has unexpected alarm information to be immediately uploaded to the data concentrator at a certain time, the channel at that time is likely to be occupied by the polling communication operation that is always present in the data concentrator, so that the node device cannot effectively upload the alarm information to the data concentrator.
In view of the above problems, no effective solution has been proposed.
Disclosure of Invention
The embodiment of the invention provides a device networking system, which aims to solve the technical problem that the existing node device cannot effectively upload alarm information to a data centralized device, and comprises the following components: a data concentration device, one or more node devices, wherein:
the data concentration equipment is provided with a first communication module and a second communication module;
the data concentration device is in polling communication with the node device through the first communication module, and receives data actively uploaded by the node device through the second communication module.
In one embodiment, the data concentration device comprises: a wireless concentrator, the node device comprising: a wireless sensor.
In one embodiment, the first communication module is a wireless communication module, and the second communication module is a wireless communication module, wherein the first communication module and the second communication module operate at different frequency points.
In one embodiment, the first communication module is one path of RS-485 bus, and the second communication module is the other path of RS-485 bus.
The embodiment of the invention also provides a method for communication based on the equipment networking system, which comprises the following steps:
the data concentration equipment transmits an instruction frame to the node equipment in a polling mode through the first communication module to realize polling communication;
and the data concentration equipment receives the alarm data actively uploaded by the node equipment through a second communication module.
In one embodiment, the data concentrator operates at a first frequency point through a first communication module, the second communication device operates at a second frequency point, the node device operates at the first frequency point during polling communication, and the node device operates at the second frequency point during uploading alarm data, wherein the first frequency point and the second frequency point are different frequency points.
In one embodiment, the first frequency point has a value in a range of [137MHZ, 1020MHZ ], and the second frequency point has a value in a range of [137MHZ, 1020MHZ ].
In one embodiment, the data concentration device issues an instruction frame to the node device through the first communication module in a polling manner to implement polling communication, including:
the data concentration equipment sends an instruction frame to first node equipment through a first communication module;
the first node equipment responds to the instruction frame and replies a data frame to the first communication module within a first preset time length;
and the data concentration equipment receives the data frame through first communication equipment, sends a confirmation frame to the first node within a second preset time length, and sends an instruction frame to second node equipment.
In one embodiment, the first preset duration is 100ms and the second preset duration is 30 ms.
In one embodiment, a node device actively uploads alarm data, including: the node equipment determines whether an instruction frame sent by the data set equipment is not received in a preset number of polling periods;
and uploading alarm data in the case that the node equipment determines that the instruction frame sent by the data set equipment is not received within a preset number of polling periods.
In one embodiment, the node device actively uploads alarm data, including: the node device determines whether a channel of the second communication module is in an idle state; in the event that it is determined to be in an idle state, alarm data is uploaded.
In the above embodiment, an apparatus networking system is provided, where a first communication module and a second communication module are arranged in a data concentrator, so that apparatus information of a data concentrator polling a node apparatus and active upload of information to the data concentrator by the node apparatus can be performed simultaneously, and by the above manner, the technical problem that an existing node apparatus cannot effectively upload alarm information to the data concentrator is solved, and a technical effect of taking into account transmission of periodic data and bursty data is achieved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a block diagram of a configuration of a device networking system according to an embodiment of the present invention;
FIG. 2 is a flow chart of a method for communicating based on a device networking system, according to an embodiment of the invention;
fig. 3 is a block diagram of a dual-frequency communication sensor system according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the following embodiments and accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention.
It is contemplated that two communication modules, one for polling communication and one for receiving data that is bursty uploaded by the node device, may be provided at the data concentrator device. By using the two communication modules, the real-time polling communication of the data concentration equipment is separated from the active information uploading operation of the node equipment, so that the function that the data concentration equipment and the node equipment can actively initiate communication requests is realized, and the reliability problem of the sudden data uploading of the node equipment is solved.
Specifically, in this example, a device networking system is provided, as shown in fig. 1, which may include: a data concentration device 101, one or more node devices 102, wherein:
a first communication module 1011 and a second communication module 1012 are arranged in the data concentration device 101;
the data concentration device 101 performs polling communication with the node device 102 through the first communication module 1011, and receives data actively uploaded by the node device 102 through the second communication module 1012.
In order to implement the wireless sensor networking system, the data concentrator 101 may include: wireless concentrator, node device 102 may include: a wireless sensor.
When the method is implemented, the method can be implemented in a wireless mode or a wired mode, and for this purpose, the method can be implemented in one of, but not limited to, the following two modes:
1) the first communication module is a wireless communication module, the second communication module is a wireless communication module, and the first communication module and the second communication module work at different frequency points.
2) The first communication module is one RS-485 bus, and the second communication module is the other RS-485 bus.
The device networking system shown in fig. 1 may perform communication in the following manner shown in fig. 2, and may include the following steps:
step 201: the data concentration equipment transmits an instruction frame to the node equipment in a polling mode through the first communication module to realize polling communication;
step 202: and the data concentration equipment receives the alarm data actively uploaded by the node equipment through a second communication module.
The data concentration equipment can work at a first frequency point through a first communication module, the second communication equipment works at a second frequency point, the node equipment can work at the first frequency point in the polling communication process, the node equipment works at the second frequency point when uploading alarm data, and the first frequency point and the second frequency point are different frequency points.
The value range of the first frequency point can be [137MHZ, 1020MHZ ], and the value range of the second frequency point can be [137MHZ, 1020MHZ ].
When polling is performed, the data concentration device issues an instruction frame to the node device through the first communication module in a polling manner, and implementing polling communication may include:
s1: the data concentration equipment sends an instruction frame to first node equipment through a first communication module;
s2: the first node equipment responds to the instruction frame and replies a data frame to the first communication module within a first preset time length;
s3: and the data concentration equipment receives the data frame through the first communication equipment, sends a confirmation frame to the first node within a second preset time length, and sends an instruction frame to the second node equipment.
The first preset time period may be 100ms, and the second preset time period may be 30 ms. However, it should be noted that the above time length value is only an illustrative description, and other suitable values may be adopted in implementation, and this is not specifically limited in this application.
In consideration of the fact that the node device sometimes fails, the instruction frame from the data set device cannot be received for a long time. For this purpose, a duration threshold may be set, and if no instruction frame is received for a long time, alarm data is uploaded. Specifically, the node device actively uploads alarm data, which may include: the node equipment determines whether an instruction frame sent by the data set equipment is not received in a preset number of polling periods; and uploading alarm data in the case that the node equipment determines that the instruction frame sent by the data set equipment is not received within a preset number of polling periods.
In practical implementation, when a channel for uploading alarm data is occupied, the node device may determine whether the channel of the second communication module is in an idle state; in the event that it is determined to be in an idle state, alarm data is uploaded. Namely, whether the channel is idle or not is judged, waiting is carried out if the channel is not idle, and alarm data is uploaded if the channel is idle.
The above method is described below with reference to a specific example, however, it should be noted that the specific example is only for better describing the present application and is not to be construed as limiting the present application.
In this example, as shown in fig. 3, a block diagram of a dual-frequency communication sensor system is shown, and two wireless modules are arranged in a data concentrator, so as to work at two different frequency points simultaneously. One frequency point is used for polling communication, and the other frequency point is used for receiving data uploaded by node equipment in a burst manner. By using the two different wireless frequency points, the real-time polling communication of the data concentration equipment is separated from the active information uploading operation of the node equipment, so that the function that the data concentration equipment and the node equipment can actively initiate communication requests is realized, and the reliability problem of the sudden data uploading of the node equipment is solved.
Namely, the wireless sensor networking system uses two different frequency point communications to synchronously carry out polling communication of data concentration equipment and active data uploading function of node equipment in the wireless sensor system, and the polling communication and the active data uploading function of the node equipment are mutually influenced, so that the transmission of periodic data and burst data is considered.
Specifically, the data concentrator uses two wireless modules A and B, and respectively and simultaneously works at two different frequency points y1 and y2 (wherein the value ranges of y1 and y2 are 137.0-1020.0 MHz);
the node equipment uses a wireless module, works at an appointed frequency point y1, uses a frequency point y1 when working normally, and uses a frequency point y2 when urgent data need to be actively uploaded;
the data concentrator uses the wireless module A to work at the frequency point y1, and performs polling communication on the node equipment.
While each node device sets 1 timer T.
Based on the above setting, communication can be performed according to the following flow:
s1: the data set device issues an instruction frame for acquiring data of node device x1 (wherein x1 is the serial number of the node device and is an integer);
s2: after receiving the instruction frame, the node device x1 replies the data frame by using the frequency point y1 within a time m1 (wherein m1 takes a value of 0-100 milliseconds), and starts to time T1 (wherein T1 takes a value of 0-65535 seconds);
s3: after receiving the data frame of the node device x1, the data concentrator issues a confirmation frame + a new command frame within a time m2 (where m2 takes a value of 0-30 milliseconds), and after receiving the confirmation frame, the node device x1 clears the timing value T1.
The confirmation frame content is a command that the data set equipment confirms that a data frame of the node equipment x1 is received, and the new instruction frame content is a command that the data set equipment acquires data of the node equipment x2 (wherein x2 is the number of the node equipment and is an integer);
s4: the node device x2 and the following devices perform the same response operation as the node device x1 in response to the command frame after receiving the command frame.
In step S2, if the data set device does not receive the valid data frame of the corresponding node device x after the time (m1+ m2) is exceeded, the command for reading the data of the node device x is repeatedly issued once, and if the reply data is not received twice, the node device is skipped over, and the next node is continuously polled until all the node devices are polled for 1 cycle, which is marked as time T2 (value range of 0 to 65535 seconds), and each time the acknowledgement frame is issued, the acknowledgement frame may carry T2 data.
For example, 20 node devices exist in the system, the device names are 1-20 respectively, the data concentration device firstly communicates with the node device 1, then communicates with the node device 2, and so on until the node device 20, and then, the operation is circulated.
The data concentrator works at a frequency point y2 by using a wireless module B, is in a data receiving mode during normal work, and can receive data which are uploaded suddenly by node equipment at any time.
When an emergency signal is required to be uploaded to the data concentrator by the node device x at a certain time, the wireless frequency point is switched from y1 to y2 within m3 (wherein m3 takes a value of 2-10 milliseconds), and then the channel detection function is started within the time.
If node device x detects that the y2 channel is idle (e.g., Rssi signal strength value ≦ 90), then it actively uploads data to the data set. After receiving the data of node device x, wireless module B of the data concentrator sends the acknowledgment frame data to node device x within m1 time.
If the node device x detects that the y2 channel is in an active state (Rssi signal strength value > -90), the channel state is continuously monitored until the y2 channel is in an idle state, then m4 x z time is delayed and waited (m4 takes 0.2 milliseconds, z is the serial number of the node device x in the current system, and the value range is 1-1000), whether the y2 channel is in the idle state is detected again, if yes, data is uploaded, and if not, the steps of continuously detecting the channel state and delaying the waiting are repeated.
After the node device x uploads data successfully, the wireless frequency point is switched from y2 to y1, and normal work is continued.
Node device x does not receive the poll command from the data set device after more than 2T 2 times, and triggers the emergency signal upload function.
In the above example, the wireless module performs data communication through different frequency points, but may be implemented in a wired manner in actual implementation. For example: the RS-485 bus uses two RS-485 buses, one RS-485 bus is used for polling and communicating each slave device by the master device, and the other RS-485 bus is in a receiving state, so that the node device can actively initiate communication at any time and upload emergency information to the master device.
From the above description, it can be seen that the embodiments of the present invention achieve the following technical effects: the utility model provides an equipment networking system is provided with first communication module and second communication module in the data concentrator to make the equipment information of data concentrator polling node equipment and node equipment initiative upload information to the data concentrator can go on simultaneously, solved the technical problem that current node equipment can't effectively upload alarm information to the data concentrator through above-mentioned mode, reached the technological effect of taking into account transmission periodic data and bursty data.
It will be apparent to those skilled in the art that the modules or steps of the embodiments of the invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, and in some cases, the steps shown or described may be performed in an order different than that described herein, or they may be separately fabricated into individual integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, embodiments of the invention are not limited to any specific combination of hardware and software.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made to the embodiment of the present invention by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. An apparatus networking system, comprising: a data concentration device, one or more node devices, wherein:
the data concentration equipment is provided with a first communication module and a second communication module, and the first communication module and the second communication module work at different frequency points;
the data concentration equipment is in polling communication with the node equipment through a first communication module, and alarm data actively uploaded by the node equipment is received through a second communication module;
wherein, the node equipment actively uploads alarm data, including:
the node equipment determines whether an instruction frame sent by the data set equipment is not received in a preset number of polling periods;
uploading alarm data when the node device determines that the instruction frame sent by the data set device is not received within a predetermined number of polling periods;
the data concentration device performs polling communication with the node device through a first communication module, and the polling communication includes:
the data concentration equipment sends an instruction frame to first node equipment through a first communication module;
the first node equipment responds to the instruction frame and replies a data frame to the first communication module within a first preset time length;
and the data concentration equipment receives the data frame through a first communication module, sends a confirmation frame to the first node within a second preset time length, and sends an instruction frame to second node equipment.
2. The device networking system of claim 1, wherein the data aggregation device comprises: a wireless concentrator, the node device comprising: a wireless sensor.
3. The device networking system according to claim 1, wherein the first communication module is a wireless communication module, and the second communication module is a wireless communication module.
4. The device networking system of claim 1, wherein the first communication module is one RS-485 bus and the second communication module is another RS-485 bus.
5. A method for communication based on the device networking system of any one of claims 1 to 4, comprising:
the data concentration equipment transmits an instruction frame to the node equipment in a polling mode through the first communication module to realize polling communication;
the data concentration equipment receives alarm data actively uploaded by the node equipment through a second communication module, and the first communication module and the second communication module work at different frequency points;
wherein, the node equipment actively uploads alarm data, including:
the node equipment determines whether an instruction frame sent by the data set equipment is not received in a preset number of polling periods;
uploading alarm data when the node device determines that the instruction frame sent by the data set device is not received within a predetermined number of polling periods;
the data concentration device issues an instruction frame to the node device through the first communication module in a polling mode to realize polling communication, and the method comprises the following steps:
the data concentration equipment sends an instruction frame to first node equipment through a first communication module;
the first node equipment responds to the instruction frame and replies a data frame to the first communication module within a first preset time length;
and the data concentration equipment receives the data frame through a first communication module, sends a confirmation frame to the first node within a second preset time length, and sends an instruction frame to second node equipment.
6. The method according to claim 5, wherein the data concentration device operates at a first frequency point through a first communication module, the second communication device operates at a second frequency point, the node device operates at the first frequency point during polling communication, and the node device operates at the second frequency point during uploading alarm data, wherein the first frequency point and the second frequency point are different frequency points.
7. The method of claim 5, wherein the first frequency point has a value in a range of [137MHZ, 1020MHZ ], and wherein the second frequency point has a value in a range of [137MHZ, 1020MHZ ].
8. The method according to claim 5, wherein the first preset duration is 100ms and the second preset duration is 30 ms.
9. The method of claim 5, wherein the node device actively uploads alarm data, comprising:
the node device determines whether a channel of the second communication module is in an idle state;
in the event that it is determined to be in an idle state, alarm data is uploaded.
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| CN110634278A (en) * | 2019-10-08 | 2019-12-31 | 荆州介太科技有限公司 | Communication method, device and control system |
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