CN107509221B - Wireless heterogeneous network cooperative communication control system and control method - Google Patents
Wireless heterogeneous network cooperative communication control system and control method Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
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- H02J7/0022—
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/30—Electrical components
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/08—Protocols for interworking; Protocol conversion
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- H—ELECTRICITY
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- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
- H04W28/18—Negotiating wireless communication parameters
- H04W28/22—Negotiating communication rate
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
- H04W28/24—Negotiating SLA [Service Level Agreement]; Negotiating QoS [Quality of Service]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0473—Wireless resource allocation based on the type of the allocated resource the resource being transmission power
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- 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
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- 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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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
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Abstract
The invention belongs to the technical field of power transmission line monitoring, and discloses a wireless heterogeneous network cooperative communication control system and a control method, wherein the control system comprises the following components: the system comprises a cloud server, a base station, a 4G router, a Sub-GHz high-speed transmission module, a control and protocol conversion module, an LPWAN module and a camera; the control method comprises the following steps: shooting surrounding environment information by using a camera; acquiring environmental temperature and humidity, illumination, wind speed, vibration, inclination and rainfall state data by using an LPWAN module; transmitting information of the LPWAN module to the 4G router and the base station by using the Sub-GHz high-speed transmission module; the base station is used for monitoring the field condition of the transmission line at any time. The invention reasonably distributes the resources related to the comprehensive transmission rate, the channel capacity and the energy consumption, and has great significance for improving the service quality of the modern wireless heterogeneous network and enhancing the user experience.
Description
Technical Field
The invention belongs to the technical field of power transmission line monitoring, and particularly relates to a wireless heterogeneous network cooperative communication control system and a control method.
Background
As the demand for smart mobile phones and their new applications increases, there will be a greater demand for network coverage and ultra-high speed communications in cellular communication networks. However, the conventional macro cellular network has been unable to meet new requirements due to the drawbacks of weak indoor signals, hot spot coverage, and low communication rate of cell edge users. To overcome these drawbacks, a performance supplement is provided, and Heterogeneous Cellular Networks (HCN) have been applied in LTE-a, and at the same time, it is considered as a key technology of the 5G wireless communication system. In HCN, including conventional macro cells, as well as various types of micro cells and pico cells, seamless coverage and higher communication rates are provided for 5G networks based on spatial spectrum multiplexing to meet the access requirements of thousands of times mobile communication requirements and huge numbers of small cells in 5G. In recent years, with heterogeneous network applications, it has been found that it can enhance channel capacity and network coverage while also saving energy consumption. Heterogeneous networks (hetnets) are wireless networks that contain different transmission powers and coverage areas. The high-power nodes are arranged in wide areas capable of covering cities, suburban areas and rural areas due to large coverage areas; the low-power node is mainly used for compensating the area which is not covered by the high-power node because the coverage area is limited. Since in a wireless environment, signals have a higher index than linear path loss, wireless radiation is characterized by a dense arrangement of low power nodes, which is more energy efficient than a sparse arrangement of high power nodes. Research on hetnets includes node cooperation, load balancing optimization, inter-cell interference coordination and the like. The resource utilization of the high-power node and the low-power node should be tightly coordinated to realize the maximization of capacity and coverage area in the HetNet, so that advanced cell interference coordination and cooperation technology is needed, and the resource utilization is realized by depending on different centralized optimization technologies, thus continuous wireless and wired data exchange is needed. Typically, the baseband and radio frequency portions of each processing unit are together and the individual processing units are arranged in a distributed fashion, which is firstly detrimental to the centralisation process and system optimisation and, as the processing units increase, the power consumption increases linearly. On the other hand, since battery technology is slow to develop, mobile devices and devices without mains supply are still limited by the development of batteries in new generation wireless communication systems. The capacity of the battery cannot meet the energy requirements of high-speed communication. Of course, because of the existence of similar solar, wind, and geothermal and tidal energy, we can use energy harvesting techniques. However, these energies are affected by, for example, weather, location or climate, and they cannot be conveniently used for mobile devices, especially in environments like indoors, while at the same time the instability and uncontrollability of these energies are difficult to use easily even outdoors. Therefore, wireless energy-carrying communication technology (SWIPT) is becoming an effective means of energy harvesting and is being appreciated by a large number of researchers. In the new generation of wireless communication systems, ultra wideband, ultra large channel capacity, space-time multiplexing, beam forming, carrier aggregation and the like are important characteristics, and the characteristics are not separated from the development of modern antenna technology. There are large array antennas for base station construction, as well as on-chip, printed circuit board antennas deployed in mobile terminal devices, due to the different application requirements. These antennas not only perform the normal communication tasks, but also serve as energy harvesting sensors in wireless energy-carrying communications. In summary, in a wireless heterogeneous network, two types of typical devices coexist in the network, namely: 1) High-speed network equipment with high power consumption level, such as equipment for collecting fast variables such as high-definition video data stream, speed and acceleration of a high-speed moving object, and the like; 2) And low-power consumption and low-speed wireless nodes in the Internet of things, a wireless sensor network and the like, such as slow variable acquisition nodes of environment temperature and humidity and the like. The wireless QoS issues involved with these two classes of devices are well separated in the current research. Thus two main research directions are derived, 1) on the basis of a channel model, the channel transmission rate is improved, or the channel capacity can be uniformly maximized, and the research aiming at reaching and approaching the Shannon channel capacity limit is realized; 2) For wireless nodes with limited energy, the power allocation strategy is studied to prolong the service life of the wireless nodes with low power consumption as far as possible, and of course, in the researches, in order to reasonably utilize limited energy and channel resources, comprehensive resource allocation is also a necessary choice. In summary, the wireless access of a vast number of small micro cellular networks with low rate, low power consumption devices, and coexistence with high speed, high capacity and high power consumption wireless devices, has resulted in the introduction of mass devices with different communication rate requirements in the new generation 5G networks for which different channel capacities, different energy consumption, and wireless heterogeneous networks of communication strategies must be designed in order to balance the requirements of channel capacities, power levels and wireless quality of service (QoS).
In summary, the problems of the prior art are: in wireless communication, it is difficult to simultaneously consider low power consumption, high reliability of low-speed data transmission, and low delay and high channel capacity of high-speed data transmission, and the wireless heterogeneous network requirements of different types of network structures exist simultaneously; and further, the wireless power distribution optimization and the energy balance control under different transmission rates of the system are more difficult to meet, and the purpose of prolonging the service life of the whole wireless communication system under the condition of limited energy is difficult to achieve.
Disclosure of Invention
Aiming at the problems existing in the prior art, the invention provides a wireless heterogeneous network cooperative communication control system and a control method. The method solves the problems of 1) coordination of heterogeneous wireless networks, coordination of wireless networks with different access rates, and resource balanced allocation coordination caused by different QoS parameter requirements; 2) Solving the energy balance problem, and having cooperation of different energy demand levels with different wireless communication rates; 3) And acquiring electric energy by combining with natural environment (such as: solar energy); 4) The wireless heterogeneous network solves the problem that the signal coverage of the existing cellular networks 3G and 4G in the field and remote areas is poor.
The invention is realized in that a wireless heterogeneous network cooperative communication control system comprises:
the cloud server is in wireless connection with the base station and is used for transmitting the real-time information monitored by the base station;
the base station is connected with the 4G router through the cloud server and is used for monitoring the field condition of the power transmission line at any time, recording and storing the field data information, and checking the historical monitoring state and the field information at any time or actively checking the field state;
the 4G router is connected with the Sub-GHz high-speed transmission module in a network cable manner and is used for transmitting the high-speed data information acquired by the Sub-GHz high-speed transmission module to the base station;
the Sub-GHz high-speed transmission module is connected with the LPWAN module in a network cable and is used for transmitting information and high-speed data of the LPWAN module, such as video, to the 4G router and the base station;
the control and protocol conversion module is connected with the LPWAN module, the camera, the 4G router and the Sub-GHz high-speed transmission module through wires, is used for controlling and converting the protocols of the above parts and providing power supply control;
the LPWAN module is in wireless connection with the Sub-GHz high-speed transmission module base station, and is used for collecting environmental temperature and humidity, illumination, wind speed, vibration, inclination and rainfall state data, controlling wireless channel power distribution and energy balance management in the LPWAN module; the system is also used for controlling wireless network data transmission of a plurality of sensors connected to the LPWAN module through serial ports and controlling the camera to shoot, and video information is transmitted through the Sub-GHz high-speed transmission module;
the camera is characterized in that the snapshot control and image detection alarm output interface of the camera is connected with the LPWAN module in a wired mode, and the video interface of the camera is connected with the Sub-GHz high-speed transmission module in a wired mode and is used for executing a similar snapshot control instruction, shooting surrounding environment information and transmitting video data.
Further, the control and protocol conversion module includes a solar management panel, the solar management panel including: the micro-light solar energy conversion controller, the multi-buffer charging controller and the intelligent switching controller are sequentially connected through wires.
Further, the low-light solar energy conversion controller is used for completing MPPT maximum power point tracking and high-efficiency self-adaptive four-phase DC/DC control;
the multi-buffer charging controller is used for completing charging control and management of independent multi-group high-temperature battery packs, completing four-section charging control of the high-temperature batteries, switching a charging mode according to a control instruction of the intelligent switching controller, and collecting input voltage, input current, charging current and charging voltage parameters;
the intelligent switching controller is used for automatically controlling the double-buffer charging controller to switch into a plurality of charging modes according to the illumination intensity: charging in a single channel and simultaneously charging in multiple channels; meanwhile, overvoltage, overcurrent, undervoltage, overcharge and overdischarge protection and self-recovery under overdischarge and other fault states are carried out.
Further, a temperature compensation component is integrated in the solar panel of the low-light solar energy conversion controller.
Further, the control and protocol conversion module further comprises an energy management module, and the energy management module is connected with the solar management panel through a wire; the energy management module is clamped at the bottom of the box body of the control and protocol conversion module; the solar energy management plate is fixed in the box body through bolts; the solar management panel is connected with a plurality of solar panels through wires;
the box body, the plurality of solar panels and the cameras are fixed on the iron tower through bolts;
the box body is also integrated with a 4G router, a Sub-GHz high-speed transmission module and an LPWAN module; the 4G router, the Sub-GHz high-speed transmission module, the LPWAN module and the camera are all connected with the energy management module through wires;
the LPWAN module comprises an LPWAN node, a temperature and humidity sensor, an illumination sensor and a vibration sensor; the temperature and humidity sensor, the illumination sensor and the vibration sensor are all connected with the LPWAN node through wires;
the solar energy management board is also connected with a plurality of storage batteries through wires; and the storage batteries are fixed on the iron tower through bolts.
Another object of the present invention is to provide a wireless heterogeneous network cooperative communication control method, including:
shooting surrounding environment information by using a camera;
the LPWAN module is utilized to acquire environmental temperature and humidity, illumination, wind speed, vibration, inclination and rainfall state data, and the wireless channel power distribution and energy balance management in the LPWAN module are controlled; the wireless network data transmission of a plurality of sensors connected to the LPWAN module through serial ports is also controlled, the camera shooting is controlled, and the video information is transmitted through the Sub-GHz high-speed transmission module;
transmitting information of the LPWAN module to the 4G router and the base station by using the Sub-GHz high-speed transmission module;
transmitting information of the Sub-GHz high-speed transmission module to a base station through a cloud server by utilizing a 4G router;
the base station is utilized to monitor the field condition of the transmission line at any time, record and save the field data information, and is also used for checking the historical monitoring state and the field information at any time or actively checking the field state;
and the control and protocol conversion module is used for providing power control for the LPWAN module, the camera, the 4G router and the Sub-GHz high-speed transmission module.
The invention has the advantages and positive effects that:
the invention reasonably distributes the resources related to the comprehensive transmission rate, the channel capacity and the energy consumption, and has great significance for improving the service quality of the modern wireless heterogeneous network and enhancing the user experience.
When the control system provided by the invention is used for high-speed data transmission, the channel capacity is high (the speed is high) and the delay is low; when in low-speed control and instruction transmission, the power consumption is low, and the reliability is high; the channel capacity requirements of the system under different transmission rates can be balanced, and the reasonable wireless power distribution and energy balance control are achieved, and the requirements of wireless service quality and user experience are improved.
Drawings
Fig. 1 is a schematic structural diagram of a cooperative communication control system of a wireless heterogeneous network according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a protocol conversion controller system according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a box connection provided in an embodiment of the present invention;
in the figure: 1. a cloud server; 2. a base station; 3. a 4G router; 4. a Sub-GHz high-speed transmission module; 6. an LPWAN module and a control and protocol conversion module; 7. a camera; 8. an energy management module; 9. a solar energy management panel; 10. a solar panel; 11. a box body.
Detailed Description
The present invention will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The principle of application of the invention is described in detail below with reference to the accompanying drawings.
As shown in fig. 1, a wireless heterogeneous network cooperative communication control system provided by an embodiment of the present invention includes:
the cloud server 1 is in wireless connection with the base station and is used for transmitting the base station monitoring real-time information;
the base station 2 is connected with the 4G router through a cloud server and is used for monitoring the field condition of the power transmission line at any time, recording and storing field data information, and checking the historical monitoring state and the field information at any time or actively checking the field state;
the 4G router 3 is connected with the Sub-GHz high-speed transmission module in a network cable manner and is used for transmitting information of the Sub-GHz high-speed transmission module to the base station;
the Sub-GHz high-speed transmission module 4 is connected with the LPWAN module in a network cable manner and is used for transmitting the information of the LPWAN module to the 4G router and the base station;
the control and protocol conversion module is connected with the LPWAN module 6, the camera, the 4G router and the Sub-GHz high-speed transmission module through wires and is used for providing power;
the LPWAN module 6 is in wireless connection with the Sub-GHz high-speed transmission module base station, is used for collecting environmental temperature and humidity, illumination, wind speed, vibration, inclination and rainfall state data, and controlling wireless channel power distribution and energy balance management in the LPWAN module; the wireless network data transmission device is also used for controlling wireless network data transmission of a plurality of sensors connected to the LPWAN module through serial ports and controlling transmission of video information shot by the camera;
the camera 7 is connected with the LPWAN module in a wired way and is used for shooting surrounding environment information.
As shown in fig. 2, the control and protocol conversion module 6 comprises a solar management panel 9 comprising: the micro-light solar energy conversion controller, the multi-buffer charging controller and the intelligent switching controller are sequentially connected through wires. The control and protocol conversion module further comprises an energy management module which is connected with the solar management panel 8 through a wire.
The low-light solar energy conversion controller is used for completing MPPT maximum power point tracking and high-efficiency self-adaptive four-phase DC/DC control;
the multi-buffer charging controller is used for completing charging control and management of independent multi-group high-temperature battery packs, completing four-section charging control of the high-temperature batteries, switching a charging mode according to a control instruction of the intelligent switching controller, and collecting input voltage, input current, charging current and charging voltage parameters;
the intelligent switching controller is used for automatically controlling the double-buffer charging controller to switch into a plurality of charging modes according to the illumination intensity: charging in a single channel and simultaneously charging in multiple channels; meanwhile, overvoltage, overcurrent, undervoltage, overcharge and overdischarge protection and self-recovery under overdischarge and other fault states are carried out.
And a temperature compensation component is integrated in the solar panel of the low-light solar energy conversion controller.
As shown in fig. 3, the energy management module 8 is clamped at the bottom of the box 11 of the control and protocol conversion module; the solar energy management plate is fixed in the box body through bolts; the solar management panel is connected with a plurality of solar panels 10 through wires;
the box body 11, the plurality of solar panels 10 and the camera 7 are fixed on the iron tower through bolts;
the box body is also integrated with a 4G router, a Sub-GHz high-speed transmission module and an LPWAN module; the 4G router, the Sub-GHz high-speed transmission module, the LPWAN module and the camera are all connected with the energy management module through wires;
the LPWAN module comprises an LPWAN node, a temperature and humidity sensor, an illumination sensor and a vibration sensor; the temperature and humidity sensor, the illumination sensor and the vibration sensor are all connected with the LPWAN node through wires;
the solar energy management board is also connected with a plurality of storage batteries through wires; and the storage batteries are fixed on the iron tower through bolts.
The wireless heterogeneous network cooperative communication control method provided by the embodiment of the invention comprises the following steps:
shooting surrounding environment information by using a camera;
the LPWAN module is utilized to acquire environmental temperature and humidity, illumination, wind speed, vibration, inclination and rainfall state data, and the wireless channel power distribution and energy balance management in the LPWAN module are controlled; the wireless network data transmission of a plurality of sensors connected to the LPWAN module through serial ports is also controlled, the camera shooting is controlled, and the video information is transmitted through the Sub-GHz high-speed transmission module;
transmitting information of the LPWAN module to the 4G router and the base station by using the Sub-GHz high-speed transmission module;
transmitting information of the Sub-GHz high-speed transmission module to a base station through a cloud server by utilizing a 4G router;
the base station is utilized to monitor the field condition of the transmission line at any time, record and save the field data information, and is also used for checking the historical monitoring state and the field information at any time or actively checking the field state;
and the control and protocol conversion module is used for providing power control for the LPWAN module, the camera, the 4G router and the Sub-GHz high-speed transmission module.
The invention is further described below in connection with specific embodiments.
The invention mixes the resource allocation problems related to the transmission rate (throughput rate), the channel capacity and the energy consumption of the multi-node, and further analyzes the utility function optimization problem related to the energy efficiency.
It is assumed that a wireless heterogeneous network is formed by combining multiple networks, wherein a model of a certain network i is as follows:
z in wherein the channel noise is represented, assuming additive white gaussian noise, the distribution of which satisfies the mean value of 0, the variance of +.>I i Representing channel interference (interference mainly from other kinds of networks in the wireless heterogeneous network, where only the total interference strength is analyzed), assuming that its distribution is satisfied, the mean value is zero and the mean square error is +.>x i And h i Representing the transmitted signal and the channel model, respectively; p is p i Representing the transmit signal power. The transmission rate of such a network is, according to shannon's theorem:
equation 1, S i ＝log 2 (1+SINR i ) Wherein SINR i Representing the signal-to-interference-and-noise ratio, namely:so if the channel bandwidth is W i Its channel capacity can be expressed as: equation 2, C i ＝W i S i 。
Assuming that there are N bits of information currently to be transmitted, the time required for transmission in i networks is:
t i ＝N/S i and the consumed energy is P i ＝p i t i The energy efficiency (energy utility function) thereof is therefore:
equation 3, η i ＝N/P i I.e. the number of bits transmitted per power consumption.
Assuming that the transmission power level of the ith network in the wireless heterogeneous network is limited to P Ci 。
In the invention, the cooperative communication decision steps of the wireless heterogeneous network are as follows:
step 1: according to the number of bits to be transmitted and the transmission delay requirement T set according to the service requirement, according to the obtained channel information of each wireless network, such as: h is a i 、W i And assumptions about channel interference and noise,calculating the transmission time t i Then reject unsatisfiedThe transmission delay requires a wireless network of T.
Step 2: and (3) aiming at the rest wireless networks, adopting an optimization algorithm to obtain a transmitting power so as to meet the maximum energy utility function, namely a formula 3.
Step 3: according to the preset transmitting power level P of various networks composing the wireless heterogeneous network Ci And (3) eliminating the wireless network types corresponding to the transmitting power higher than the set value in the step (2).
Step 4: and selecting the network with the maximum real-time channel capacity evaluation from the rest wireless heterogeneous network types as the selected network of the current transmission.
Note that: 1) If all the alternative networks are removed after the step 1, reducing the transmission delay requirement, and re-selecting the wireless network until the wireless network meeting the condition exists;
2) After passing through step 3, if all the alternative networks have been eliminated, selecting the transmission power level closest to the transmission power level P among all the wireless networks Ci And not less than two wireless networks as an alternative network for the subsequent steps.
Through the steps, the invention fully utilizes the cooperative communication of the wireless heterogeneous network to improve the performance of channel capacity balance, optimal power distribution, user experience improvement and the like of the network.
The invention analyzes the optimized communication strategy to meet the wireless heterogeneous network requirements under different channel capacities, throughput rates, energy consumption and communication protocols.
According to the invention, theoretical results are summarized, a feasible experimental method is selected, and the correctness and the effectiveness of theoretical research results are verified by constructing an experimental platform, so that the research of the project has practical reference value and creative value of theory and practice. The experimental verification method adopted by the invention is as follows:
1. selecting the existing wireless network schemes such as a 3G/4G network, wiFi, bluetooth, a microwave radio station and the like as comparison schemes of the invention, and constructing a test platform simultaneously with the invention;
2. data transmission of two different properties is performed separately or simultaneously, namely: low code rate (low channel capacity), delay insensitive state information, such as: temperature and humidity, illumination, rainfall, battery state change, inclination and the like; high speed data (high channel capacity), delay requires high information such as video, audio, speed, acceleration, etc. To verify the effectiveness of the network selection method of the wireless heterogeneous network, and to have advantages over the existing single network;
3. selecting a remote mountain area with poor 4G network coverage (large channel fading, low transmission rate, frequent network disconnection and the like) as a test scheme of a wireless heterogeneous network enhanced 4G mobile network coverage area;
4. the method comprises the steps of randomly and continuously generating data (the data size and the time delay requirement are random) to be transmitted in a wireless way, then, respectively carrying out continuous transmission tests by using the wireless heterogeneous network and the traditional wireless network, and comparing the continuous working time of the wireless heterogeneous network with the continuous working time of the traditional wireless network for comparison under the condition that the energy management method is compared with the energy acquisition strategy without external energy; and comparing the continuous working time under the control of the external energy acquisition strategy, and further testing the working time interval and the secondary continuous working time of the system after the outage.
The invention is further described below in connection with specific embodiments.
(1) Energy management
The average radiation quantity of the south most areas in China is only 8-49% of the common intensity, and the rest time is below 30% except summer. This situation results in a typical 720W solar panel in video surveillance that is less than 10% generating effect at maximum over half the year.
In order to improve the power generation efficiency and ensure the sufficient energy of a later-stage system, a plurality of solar panel combinations (serial-parallel combinations) are used to increase the charging power and the output voltage on the basis of being provided with a battery pack with larger capacity. The power management module is connected with the solar management panel and the LPWAN node and provides subsequent energy for the system work.
(2) Remote video transmission technology
The wireless image transmission, namely video real-time transmission, mainly has two concepts, namely mobile transmission, namely mobile communication, and broadband transmission, namely broadband communication, so that two main problems are to be solved by developing a wireless image transmission system capable of stably transmitting high-definition video with very wide frequency band in the high-speed moving process: echo interference caused by multipath propagation; secondly, the problem of the utilization rate of frequency resources and the gradual saturation.
On the other hand, the application level is divided into two main types, namely an image monitoring transmission system with a fixed point and a mobile video image transmission system. The wireless image monitoring transmission system of the fixed point is mainly applied to occasions where wired closed-circuit monitoring is inconvenient to realize, such as monitoring systems of ports and docks, video and data monitoring of river water conservancy, forest fire prevention monitoring systems, urban safety monitoring and the like. Of course, what is considered here is the image monitoring transmission of the fixed point.
Furthermore, in consideration of camera controllability, power consumption and stability, a digital camera of Haikang vision is used as a collection end, a network protocol converter is developed, and a Sub-GHz wireless high-speed data transmission module circuit design and a transmission layer protocol are optimized to realize wireless image transmission and uploading to a cloud server and storage.
(3) Cloud monitoring platform and software terminal design
The cloud monitoring platform function comprises field device parameter acquisition, setting, picture acquisition, storage and the like. The cloud monitoring platform is used as a software platform for whole monitoring, monitors the field condition of the power transmission line at any time, records and stores the field data information and the cloud service end, and a user can check the historical monitoring state and the field information at any time or actively check the field state.
Cloud monitoring platform
In addition, the user can read the battery voltage of the equipment through the software client, read or set setting parameters, view historical information and the like, and the user can obtain the condition information of the iron tower through active snapshot, so that double-click pictures can be amplified and viewed.
The invention is further described below in connection with a control and protocol conversion module.
The backbone nodes in the framework are connected with each other by means of low-speed LPWAN modules to complete low-speed and high-reliability control and command uplink and downlink wireless transmission, and the Sub-GHz high-speed transmission modules are used for high-speed and large-data-volume wireless communication. The LPWAN module is used for sending control instructions to complete high-speed or large-data acquisition such as camera shooting and image shooting, and also comprises the steps of controlling wireless sensor nodes near backbone nodes in a frame to complete state data collection such as environment temperature and humidity, illumination, wind speed, vibration, inclination, rainfall and the like, and controlling to complete tasks such as wireless channel power distribution, energy balance management, wireless network data, control instructions, video transmission and the like. The related information collected by the LPWAN module is transmitted to the 4G router through the Sub-GHz high-speed transmission module and then uploaded to the cloud server for access by users. Selecting a 4G router to directly upload data to a cloud server in the coverage area of a mobile network base station signal; in remote mountain areas covered by base station signals or areas with poor base station signals, a Sub-GHz high-speed transmission module is adopted to transmit data to a wireless communication access point with mobile network signals so as to enter an Internet network, thereby enhancing the coverage of the mobile network signals and guaranteeing the reliability of wireless transmission.
The invention relates to an energy management module and a solar energy management board, which solve the problem of electric energy collection management of wireless communication backbone nodes, and comprises the following steps:
1) Low light level and low wind conversion controller: a first-level low-light and low-wind energy conversion controller is added in front of a simple wind-light complementary controller, and the MPPT (maximum power point) tracking and high-efficiency self-adaptive four-phase DC/DC controller functions are completed.
2) Multi-buffer charge controller: and the charging control and management of the independent multiple battery packs are completed, four-section battery charging control is adopted, the charging mode is switched according to the control instruction of the intelligent switching controller, and various parameters such as input voltage, current, charging current, voltage and the like are collected.
3) And (3) an intelligent switching controller: the multi-buffer charging controller can be automatically controlled to switch into a plurality of charging modes according to the illumination intensity and the wind speed: single-channel charging, double-channel simultaneous charging and the like; meanwhile, the protection functions of overvoltage, overcurrent, undervoltage, overcharge, overdischarge and the like are achieved; and self-recovery functions in overdischarge and other fault conditions.
4) Temperature compensation assembly: if one or several of the combined solar panels are shielded from sunlight, a local overheating phenomenon occurs on the part of the solar panels, so that a temperature compensation function needs to be added to the controller.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (2)
1. A wireless heterogeneous network cooperative communication control system, characterized in that the wireless heterogeneous network cooperative communication control system comprises:
the cloud server is in wireless connection with the base station and is used for transmitting the real-time information monitored by the base station;
the base station is connected with the 4G router through the cloud server and is used for monitoring the field condition of the power transmission line at any time, recording and storing the field data information, and checking the historical monitoring state and the field information at any time or actively checking the field state;
the 4G router is connected with the Sub-GHz high-speed transmission module in a network cable manner and is used for transmitting the high-speed data information acquired by the Sub-GHz high-speed transmission module to the base station;
the Sub-GHz high-speed transmission module is connected with the LPWAN module in a network cable and is used for transmitting information and high-speed data of the LPWAN module, such as video, to the 4G router and the base station;
the control and protocol conversion module is connected with the LPWAN module, the camera, the 4G router and the Sub-GHz high-speed transmission module through wires, is used for controlling and converting the protocols of the above parts and providing power supply control;
the LPWAN module is in wireless connection with the Sub-GHz high-speed transmission module base station, and is used for collecting environmental temperature and humidity, illumination, wind speed, vibration, inclination and rainfall state data, controlling wireless channel power distribution and energy balance management in the LPWAN module; the system is also used for controlling wireless network data transmission of a plurality of sensors connected to the LPWAN module through serial ports and controlling the camera to shoot, and video information is transmitted through the Sub-GHz high-speed transmission module;
the camera is used for performing a similar snapshot control instruction, shooting surrounding environment information and transmitting video data, and the snapshot control and image detection alarm output interface of the camera is connected with the LPWAN module in a wired mode;
the control and protocol conversion module comprises a solar management panel, wherein the solar management panel comprises: the micro-light solar energy conversion controller, the multi-buffer charging controller and the intelligent switching controller are sequentially connected through wires;
the low-light solar energy conversion controller is used for completing MPPT maximum power point tracking and high-efficiency self-adaptive four-phase DC/DC control;
the multi-buffer charging controller is used for completing charging control and management of independent multi-group high-temperature battery packs, completing four-section charging control of the high-temperature batteries, switching a charging mode according to a control instruction of the intelligent switching controller, and collecting input voltage, input current, charging current and charging voltage parameters;
the intelligent switching controller is used for automatically controlling the double-buffer charging controller to switch into a plurality of charging modes according to the illumination intensity: charging in a single channel and simultaneously charging in multiple channels; meanwhile, overvoltage, overcurrent, undervoltage, overcharge and overdischarge protection and self-recovery under overdischarge and other fault states are carried out;
a temperature compensation component is integrated in a solar panel of the low-light solar energy conversion controller;
the control and protocol conversion module further comprises an energy management module, and the energy management module is connected with the solar management panel through a wire; the energy management module is clamped at the bottom of the box body of the control and protocol conversion module; the solar energy management plate is fixed in the box body through bolts; the solar management panel is connected with a plurality of solar panels through wires;
the box body, the plurality of solar panels and the cameras are fixed on the iron tower through bolts;
the box body is also integrated with a 4G router, a Sub-GHz high-speed transmission module and an LPWAN module; the 4G router, the Sub-GHz high-speed transmission module, the LPWAN module and the camera are all connected with the energy management module through wires;
the LPWAN module comprises an LPWAN node, a temperature and humidity sensor, an illumination sensor and a vibration sensor; the temperature and humidity sensor, the illumination sensor and the vibration sensor are all connected with the LPWAN node through wires;
the solar energy management board is also connected with a plurality of storage batteries through wires; and the storage batteries are fixed on the iron tower through bolts.
2. The wireless heterogeneous network cooperative communication control method of the wireless heterogeneous network cooperative communication control system according to claim 1, wherein the wireless heterogeneous network cooperative communication control method comprises:
shooting surrounding environment information by using a camera;
the LPWAN module is utilized to acquire environmental temperature and humidity, illumination, wind speed, vibration, inclination and rainfall state data, and the wireless channel power distribution and energy balance management in the LPWAN module are controlled; the wireless network data transmission of a plurality of sensors connected to the LPWAN module through serial ports is also controlled, the camera shooting is controlled, and the video information is transmitted through the Sub-GHz high-speed transmission module;
transmitting information of the LPWAN module to the 4G router and the base station by using the Sub-GHz high-speed transmission module;
transmitting information of the Sub-GHz high-speed transmission module to a base station through a cloud server by utilizing a 4G router;
the base station is utilized to monitor the field condition of the transmission line at any time, record and save the field data information, and is also used for checking the historical monitoring state and the field information at any time or actively checking the field state;
and the control and protocol conversion module is used for providing power control for the LPWAN module, the camera, the 4G router and the Sub-GHz high-speed transmission module.
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