CN108882246B - Industrial wireless network dynamic spectrum pool construction system and method - Google Patents

Industrial wireless network dynamic spectrum pool construction system and method Download PDF

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CN108882246B
CN108882246B CN201810584025.9A CN201810584025A CN108882246B CN 108882246 B CN108882246 B CN 108882246B CN 201810584025 A CN201810584025 A CN 201810584025A CN 108882246 B CN108882246 B CN 108882246B
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wireless network
spectrum pool
node
industrial wireless
industrial
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CN108882246A (en
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许洪华
关新平
陈彩莲
徐池
江涛
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Suzhou University of Science and Technology
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/14—Spectrum sharing arrangements between different networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/18—Network planning tools
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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Abstract

The invention relates to an industrial wireless network dynamic spectrum pool construction system and method, comprising an industrial production area where industrial production equipment is located, an industrial wireless network area used for measurement and control in the industrial production area, an industrial wireless network node formed by wireless meters in the industrial wireless network area, a plurality of spectrum pool construction system nodes distributed in the industrial production area and provided with industrial wireless communication full-channel spectrum sensing capability and power adjustable communication capability, and a spectrum pool construction system area used for sensing the spectrum of the industrial wireless network area, wherein the spectrum pool construction system area covers the industrial wireless network area by a plurality of communicated square areas. The invention provides a basic condition for improving the spectrum efficiency by dividing the industrial wireless network area into a series of connected square areas with certain side length and placing spectrum pool construction nodes in each square area and generating a dynamic ordered spectrum pool.

Description

Industrial wireless network dynamic spectrum pool construction system and method
Technical Field
The invention relates to the technical field of industrial wireless network communication, in particular to a system and a method for constructing a dynamic spectrum pool of an industrial wireless network.
Background
Industrial wireless networks have become a further key technology in the field of industrial automation following fieldbus, industrial ethernet, where how to communicate and network according to the communication environment spectrum information is always the key of this technology. At present, an industrial wireless system is generally used for guiding a spectrum use decision according to communication statistical information or spectrum sensing information of a bottom instrument, and the mode has two problems that firstly, the spectrum sensing and data processing functions of the bottom instrument are limited, the main functions of the instruments are related to measurement and control, and the system resources occupied by the spectrum sensing and channel evaluation can also bring adverse effects to the measurement and control system; secondly, in the 4.0-era industry, the production flexibility is continuously enhanced, the topology and the requirements of an industrial wireless system also need to be changed along with the change of the process and the production requirements, the existing mode and the mode of using the bottom layer measurement and control instrument face challenges, the channel and the evaluation information are difficult to dynamically acquire on line, and the strain capacity is insufficient.
In the typical technical scheme, the WirelessHART technology evaluates the field communication condition offline, then sets a communication channel blacklist mechanism, and removes the channel with poor communication quality from the used frequency spectrum pool; the WIA/PA sets a white list mechanism, and keeps the channels with good communication quality in a frequency spectrum pool. Both schemes are actually used for simply eliminating the determined unreliable channels, and the determination process is performed offline, so that the method is difficult to adapt to the dynamically-changed spectrum environment, and the removed channels are difficult to recover when the channel quality is improved, thereby reducing the spectrum resource utilization rate. On the other hand, these typical methods do not rank the channel quality in the used spectral pool, and the random rather than preferential use also reduces spectral efficiency.
In industrial wireless systems (or wireless subsystems of wired/wireless industrial heterogeneous networks), sensing and evaluation information on wireless channels, cognitive information on wireless network states, etc. have become important fundamental information in system operation. However, no dedicated devices and systems are designed to collect and process this information in the current industrial wireless systems. The invention designs a distributed wireless spectrum sensing system capable of being flexibly deployed, which senses the spectrum information of an industrial wireless network in real time and constructs a dynamic spectrum pool with channel quality information in the industrial wireless network, thereby providing basic state information for industrial wireless communication and networking.
Several definitions are used in the present invention:
1. industrial production area: the area of the industrial production equipment;
2. industrial wireless network area: the industrial wireless node equipment for measurement and control is located in the industrial production area;
3. spectrum pool building system area: the wireless network is used for sensing the area of the industrial wireless network area spectrum.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provide a system and a method for constructing a dynamic spectrum pool of an industrial wireless network, which are used for sensing the spectrum information of the industrial wireless network in real time and constructing the dynamic spectrum pool with channel quality information in the industrial wireless network, so as to provide basic state information for industrial wireless communication and networking.
In order to achieve the technical purpose and the technical effect, the invention is realized by the following technical scheme:
an industrial wireless network dynamic spectrum pool construction system comprises an industrial production area where industrial production equipment is located, an industrial wireless network area used for measurement and control in the industrial production area, and an industrial wireless network node formed by wireless meters in the industrial wireless network area, wherein the system comprises a plurality of spectrum pool construction system nodes with industrial wireless communication full-channel spectrum sensing capability and power adjustable communication capability distributed in the industrial production area, and a spectrum pool construction system area used for sensing the spectrum of the industrial wireless network area,
the spectrum pool construction system area covers an industrial wireless network area by a plurality of communicated square areas;
each industrial wireless network node comprises at least one frequency spectrum pool construction system node in the communication radius, so that the existence of the frequency spectrum pool construction system node can sense the communication of the industrial wireless network node;
and each frequency spectrum pool construction system node at least comprises another frequency spectrum pool construction system node in the communication radius, so that the connectivity among the frequency spectrum pool construction system nodes is ensured.
Further, the frequency spectrum pool construction system node communication radius
Figure DEST_PATH_IMAGE002A
The method comprises the following steps: />
Figure DEST_PATH_IMAGE004
The side length d of the square area is as follows: />
Figure DEST_PATH_IMAGE006
Wherein->
Figure DEST_PATH_IMAGE008
Is the minimum communication radius of the industrial wireless network node.
Further, a spectrum pool construction system node is placed in each square area.
Further, the spectrum pool construction system node comprises a ZigBee chip MC13213, and the ZigBee chip MC13213 is respectively connected with a clock circuit, a BDM interface, an antenna circuit, a power supply and a corresponding basic peripheral circuit.
A construction method of an industrial wireless network dynamic spectrum pool comprises the following steps:
step 1) taking one end point of an industrial wireless network area as an origin, establishing a plane rectangular coordinate system, taking an abscissa unit as a corresponding square number, and sequentially marking a frequency spectrum pool to construct a system node;
step 2) selecting a corresponding wireless communication protocol, each spectrum pool building system node periodically perceiving the quality of each channel
Figure DEST_PATH_IMAGE010
And periodically counting the communication condition of industrial wireless network nodes in the unit cell>
Figure DEST_PATH_IMAGE012
Taking->
Figure DEST_PATH_IMAGE014
As a result of spectrum sensing at the nodes of the spectrum pool building system, wherein +.>
Figure DEST_PATH_IMAGE016
And->
Figure DEST_PATH_IMAGE018
The channel perception result and the communication statistical result at the node N are respectively the weight coefficients of the channel quality result;
step 3), each spectrum pool construction system node sequentially transmits spectrum sensing results along X coordinate axes, and end nodes take
Figure DEST_PATH_IMAGE020
As a system spectral pool channel quality, wherein +.>
Figure DEST_PATH_IMAGE022
And->
Figure DEST_PATH_IMAGE024
As vectors, constructing a system node channel quality by each frequency spectrum pool and occupying a weight coefficient in a system frequency spectrum pool channel quality result;
step 4) sorting according to the quality of each channel, selecting a required number of channels to form an available spectrum pool according to the needs of an industrial wireless network, and reversely transmitting the available spectrum pool back to each spectrum pool by the terminal node to construct a system node;
step 5) in the working process of the system, the construction process of the frequency spectrum pool is carried out periodically, and the weight is optimized through reinforcement learning so as to form a dynamic frequency spectrum pool available for the system.
Further, the next hop X of the nodes of the spectrum pool construction system in the step 3) is along the Y axis when no node exists.
Further, the industrial wireless network in the step 2) adopts an IEEE 802.15.4 physical layer and a link layer.
The beneficial effects of the invention are as follows:
according to the invention, the industrial wireless network area is divided into a series of square areas with a certain side length and communicated, and the spectrum pool construction nodes are placed in each square area, so that the dynamic ordered spectrum pool is generated according to the methods of distributed sensing, weighted fusion and periodic updating, and a basic condition is provided for improving the spectrum efficiency. Under the background of flexible production and intelligent manufacturing, production process variation, recombination and automatic production equipment reconstruction become normal gradually, and a set of independent spectrum sensing systems are also basic configuration of the production process and are increasingly important.
Drawings
FIG. 1 is a diagram of an industrial wireless network dynamic spectrum pool building system of the present invention;
FIG. 2 is a schematic diagram of node communication and spectral pool construction of the spectral pool construction system of the present invention;
FIG. 3 is a schematic diagram of a node of the spectral pool construction system of the present invention.
Detailed Description
The invention will be described in detail below with reference to the drawings in combination with embodiments.
An industrial wireless network dynamic spectrum pool construction system comprises an industrial production area where industrial production equipment is located, an industrial wireless network area used for measurement and control in the industrial production area, and an industrial wireless network node formed by wireless meters in the industrial wireless network area, wherein the system comprises a plurality of spectrum pool construction system nodes with industrial wireless communication full-channel spectrum sensing capability and power adjustable communication capability distributed in the industrial production area, and a spectrum pool construction system area used for sensing the spectrum of the industrial wireless network area,
as shown in fig. 1, the spectrum pool building system area covers an industrial wireless network area with a plurality of connected square areas;
each industrial wireless network node comprises at least one frequency spectrum pool construction system node in the communication radius, so that the existence of the frequency spectrum pool construction system node can sense the communication of the industrial wireless network node;
and each frequency spectrum pool construction system node at least comprises another frequency spectrum pool construction system node in the communication radius, so that the connectivity among the frequency spectrum pool construction system nodes is ensured.
Further, the frequency spectrum pool construction system node communication radius
Figure DEST_PATH_IMAGE002AA
The method comprises the following steps: />
Figure DEST_PATH_IMAGE004A
The side length d of the square area is as follows: />
Figure DEST_PATH_IMAGE006A
Wherein->
Figure DEST_PATH_IMAGE008A
Is the minimum communication radius of the industrial wireless network node.
Further, a spectrum pool construction system node is placed in each square area.
As shown in fig. 3, the spectrum pool construction system node includes a ZigBee chip MC13213, where the ZigBee chip MC13213 is connected to a clock circuit, a BDM interface, an antenna circuit, a power supply, and a corresponding basic peripheral circuit, respectively.
A construction method of an industrial wireless network dynamic spectrum pool comprises the following steps:
step 1) as shown in fig. 1 and fig. 2, a plane rectangular coordinate system is established by taking one end point of an industrial wireless network area as an origin, the units of the horizontal and vertical coordinates are corresponding square grid numbers, and the nodes of a spectrum pool construction system are marked in sequence, in this embodiment, for example, the node N of the 3 rd square grid along the X-axis direction and the node N of the 2 nd square grid along the Y-axis direction in fig. 1 can be marked as
Figure DEST_PATH_IMAGE026
；
Step 2) selecting a corresponding wireless communication protocol, each spectrum pool building system node periodically perceiving the quality of each channel
Figure DEST_PATH_IMAGE010A
And periodically counting the communication condition of industrial wireless network nodes in the unit cell>
Figure DEST_PATH_IMAGE012A
Taking->
Figure DEST_PATH_IMAGE014A
As a result of spectrum sensing at the nodes of the spectrum pool building system, wherein +.>
Figure DEST_PATH_IMAGE016A
And->
Figure DEST_PATH_IMAGE018A
The channel perception result and the communication statistical result at the node N are respectively the weight coefficients of the channel quality result;
step 3) the respective spectraThe pool construction system nodes sequentially transmit spectrum sensing results along X coordinate axes, and end nodes take
Figure DEST_PATH_IMAGE020A
As a system spectral pool channel quality, wherein +.>
Figure DEST_PATH_IMAGE022A
And->
Figure DEST_PATH_IMAGE024A
As vectors, constructing a system node channel quality by each frequency spectrum pool and occupying a weight coefficient in a system frequency spectrum pool channel quality result;
step 4) sorting according to the quality of each channel, selecting a required number of channels to form an available spectrum pool according to the needs of an industrial wireless network, and reversely transmitting the available spectrum pool back to each spectrum pool by the terminal node to construct a system node;
step 5) in the working process of the system, the construction process of the frequency spectrum pool is carried out periodically, and the weight is optimized through reinforcement learning so as to form a dynamic frequency spectrum pool available for the system.
And 3) constructing a next hop X of the system node by using the spectrum pool in the step along the Y axis when no node exists.
The industrial wireless network in the step 2) adopts an IEEE 802.15.4 physical layer and a link layer.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (5)

1. An industrial wireless network dynamic spectrum pool construction system comprises an industrial production area where industrial production equipment is located, an industrial wireless network area used for measurement and control in the industrial production area and an industrial wireless network node formed by wireless meters in the industrial wireless network area, and is characterized by comprising a plurality of spectrum pool construction system nodes with industrial wireless communication full-channel spectrum sensing capability and power adjustable communication capability distributed in the industrial production area and a spectrum pool construction system area used for sensing the spectrum of the industrial wireless network area,
the spectrum pool construction system area covers an industrial wireless network area by a plurality of communicated square areas;
each industrial wireless network node comprises at least one frequency spectrum pool construction system node in the communication radius, so that the existence of the frequency spectrum pool construction system node can sense the communication of the industrial wireless network node;
each frequency spectrum pool constructing system node at least comprises another frequency spectrum pool constructing system node in the communication radius, so that the connectivity among the frequency spectrum pool constructing system nodes is ensured;
the node communication radius rs of the spectrum pool construction system is as follows:
Figure FDA0004074635660000011
the side length d of the square area is as follows:
Figure FDA0004074635660000012
where rm is the minimum communication radius of the industrial wireless network node;
and a spectrum pool construction system node is arranged in each square area.
2. The industrial wireless network dynamic spectrum pool construction system according to claim 1, wherein the spectrum pool construction system node comprises a ZigBee chip MC13213, and the ZigBee chip MC13213 is connected with a clock circuit, a BDM interface, an antenna circuit, a power supply, and a corresponding basic peripheral circuit, respectively.
3. The method for constructing the dynamic spectrum pool of the industrial wireless network is characterized by comprising the following steps of:
step 1) taking one end point of an industrial wireless network area as an origin, establishing a plane rectangular coordinate system, taking an abscissa unit as a corresponding square number, and sequentially marking a frequency spectrum pool to construct a system node;
step 2) selecting a corresponding wireless communication protocol, each spectrum pool building system node periodically perceiving the respective channel quality Q Nc ＝{q Nc1 ,q Nc2 ,…,q Nc16 And periodically counting the communication condition Q of the industrial wireless network nodes in the unit cell Ns ＝{q Ns1 ,q Ns2 ,…,q Ns16 Get Q N ＝α N Q Nc +β N Q Ns As a result of spectrum sensing at the node of the spectrum pool construction system, wherein alpha N And beta N The channel perception result and the communication statistical result at the node N are respectively the weight coefficients of the channel quality result;
step 3) each spectrum pool construction system node sequentially transmits spectrum sensing results along X coordinate axes, and the end node takes Q=alpha Q c +βQ s As the channel quality of the system spectrum pool, wherein alpha and beta are vectors, and the channel quality of each spectrum pool constructing system node occupies a weight coefficient in the channel quality result of the system spectrum pool;
step 4) sorting according to the quality of each channel, selecting a required number of channels to form an available spectrum pool according to the needs of an industrial wireless network, and reversely transmitting the available spectrum pool back to each spectrum pool by the terminal node to construct a system node;
step 5) in the working process of the system, the construction process of the frequency spectrum pool is carried out periodically, and the weight is optimized through reinforcement learning so as to form a dynamic frequency spectrum pool available for the system.
4. The method for constructing dynamic spectrum pool of industrial wireless network according to claim 3, wherein the next hop X of the spectrum pool constructing system node in step 3) is along the Y-axis when no node exists.
5. The method for building dynamic spectrum pool of industrial wireless network according to claim 3, wherein the industrial wireless network in step 2) adopts IEEE 802.15.4 physical layer and link layer.
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