CN111954274B - Cellular network communication method and system based on LoRa technology - Google Patents

Cellular network communication method and system based on LoRa technology Download PDF

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Publication number
CN111954274B
CN111954274B CN202010714206.6A CN202010714206A CN111954274B CN 111954274 B CN111954274 B CN 111954274B CN 202010714206 A CN202010714206 A CN 202010714206A CN 111954274 B CN111954274 B CN 111954274B
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data acquisition
acquisition device
background server
module
lora wireless
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CN111954274A (en
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黄京定
陈祥宇
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Guangzhou Xuankun Information Technology Co ltd
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Guangzhou Xuankun Information Technology Co ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/16—Performing reselection for specific purposes
    • H04W36/165—Performing reselection for specific purposes for reducing network power consumption
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • 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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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The application discloses a cellular communication method based on LoRa technology, which comprises the following steps: when the data acquisition equipment and the background server cannot directly carry out cellular communication, selecting an optimal route to carry out cellular communication on the data acquisition equipment and the background server; controlling each data acquisition device to perform wireless interception at the lowest rate, and adjusting the wireless rate according to the wireless signal strength after the initiator and the receiver data acquisition devices establish LoRa wireless connection according to address matching; before the data acquisition equipment is connected wirelessly or transmits wireless data, if the current frequency is detected to meet the preset automatic frequency hopping condition, the current frequency is switched to a clean channel for communication. The embodiment of the application can effectively improve the communication efficiency between the data acquisition equipment and the background server.

Description

Cellular network communication method and system based on LoRa technology
Technical Field
The application relates to the technical field of wireless communication, in particular to a cellular communication method and system based on LoRa technology.
Background
The cellular mobile communication (Cellular Mobile Communication) adopts a cellular wireless networking mode, and is connected between a terminal and network equipment through a wireless channel, so that the mutual communication of users in the activities is realized. The inventor of the present application found in the research that the existing cellular network communication method has lower communication efficiency between the device and the background server due to more signal coverage blind areas and unstable signal coverage.
Disclosure of Invention
The application provides a cellular communication method and a cellular communication system based on LoRa technology, which are used for solving the technical problem that the communication efficiency between the existing cellular network communication method equipment and a background server is low.
In order to solve the above technical problems, an embodiment of the present application provides a cellular communication method based on the LoRa technology, including:
the system comprises a background server and at least one data acquisition device, wherein at least one data acquisition device comprises a first data acquisition device and a second data acquisition device;
the first data acquisition equipment comprises a first cellular module and at least one LoRa wireless module, wherein the at least one LoRa wireless module comprises a first LoRa wireless module, and the cellular module is respectively connected with the first LoRa wireless module and the background server;
the second data acquisition device comprises at least one LoRa wireless module, the at least one LoRa wireless module comprises a second LoRa wireless module, and the second LoRa wireless module is connected with a first LoRa wireless module of the first data acquisition device so as to establish LoRa wireless connection between the first data acquisition device and the second data acquisition device;
the communication method comprises the following steps:
when the data acquisition equipment and the background server cannot directly carry out cellular communication, selecting an optimal route to carry out cellular communication on the data acquisition equipment and the background server;
controlling each data acquisition device to perform wireless interception at the lowest rate, and adjusting the wireless rate according to the wireless signal strength after the initiator and the receiver data acquisition devices establish LoRa wireless connection according to address matching;
before the data acquisition equipment is connected wirelessly or transmits wireless data, if the current frequency is detected to meet the preset automatic frequency hopping condition, the current frequency is switched to a clean channel for communication.
In one embodiment of the present application, when the data acquisition device and the background server cannot directly perform cellular communication, selecting an optimal route to perform cellular communication between the data acquisition device and the background server, specifically:
setting a plurality of routes of each data acquisition device, and when each data acquisition device and the background server cannot directly carry out cellular communication, carrying out connection attempt according to the priorities of the plurality of routes, and taking the successfully connected route as an optimal route.
In one embodiment of the present application, when the data acquisition device and the background server cannot directly perform cellular communication, selecting an optimal route to perform cellular communication between the data acquisition device and the background server, further includes:
when each data acquisition device cannot directly carry out cellular communication with the background server, sending a route searching signaling to search other data acquisition devices successfully connected with the background server, adding the data acquisition device successfully connected with the background server into a route of a sender, and comprehensively sequencing the data acquisition devices of the sender according to the connection attribute, the signal strength, the lower-level route quantity and the historical connection state of the other data acquisition devices and the background server to select an optimal route.
In one embodiment of the present application, if it is detected that the current frequency meets a preset automatic frequency hopping condition, the current frequency is switched to a clean channel for communication, specifically:
if the occupation of the signal with the current frequency reaches the preset time, initiating a wireless frequency modulation broadcast signaling at the lowest speed of the default frequency, detecting a clean channel according to the wireless frequency modulation broadcast signaling, and switching the current frequency to the clean channel.
In one embodiment of the present application, the wireless transmit power of the LoRa wireless module comprises 100mw, 1W, 2W, and 5W.
Another embodiment of the present application provides a cellular communication system based on the LoRa technology, comprising:
the system comprises a background server and at least one data acquisition device, wherein at least one data acquisition device comprises a first data acquisition device and a second data acquisition device;
the first data acquisition equipment comprises a first cellular module and at least one LoRa wireless module, wherein the at least one LoRa wireless module comprises a first LoRa wireless module, and the cellular module is respectively connected with the first LoRa wireless module and the background server;
the second data acquisition device comprises at least one LoRa wireless module, the at least one LoRa wireless module comprises a second LoRa wireless module, and the second LoRa wireless module is connected with a first LoRa wireless module of the first data acquisition device so as to establish LoRa wireless connection between the first data acquisition device and the second data acquisition device;
the data acquisition device further comprises:
the routing module is used for selecting an optimal route to carry out cellular communication between the data acquisition equipment and the background server when the data acquisition equipment and the background server cannot directly carry out cellular communication;
the rate adjustment module is used for controlling each data acquisition device to perform wireless interception at the lowest rate, and adjusting the wireless rate according to the wireless signal intensity after the initiator and the receiver data acquisition devices establish LoRa wireless connection according to address matching;
and the channel switching module is used for switching the current frequency to a clean channel for communication if the current frequency is detected to meet the preset automatic frequency hopping condition before the data acquisition equipment is in wireless connection or transmits wireless data.
In one embodiment of the present application, the routing module is configured to:
setting a plurality of routes of each data acquisition device, and when each data acquisition device and the background server cannot directly carry out cellular communication, carrying out connection attempt according to the priorities of the plurality of routes, and taking the successfully connected route as an optimal route.
In one embodiment of the present application, the routing module is further configured to:
when each data acquisition device cannot directly carry out cellular communication with the background server, sending a route searching signaling to search other data acquisition devices successfully connected with the background server, adding the data acquisition device successfully connected with the background server into a route of a sender, and comprehensively sequencing the data acquisition devices of the sender according to the connection attribute, the signal strength, the lower-level route quantity and the historical connection state of the other data acquisition devices and the background server to select an optimal route.
In one embodiment of the present application, the channel switching module is further configured to:
if the occupation of the signal with the current frequency reaches the preset time, initiating a wireless frequency modulation broadcast signaling at the lowest speed of the default frequency, detecting a clean channel according to the wireless frequency modulation broadcast signaling, and switching the current frequency to the clean channel.
In one embodiment of the present application, the wireless transmit power of the LoRa wireless module comprises 100mw, 1W, 2W, and 5W.
Compared with the prior art, the method and the device have the beneficial effects that when the data acquisition equipment and the background server cannot directly carry out cellular communication, the data acquisition equipment and the background server are subjected to cellular communication by selecting the optimal route, so that the communication efficiency between the data acquisition equipment and the background server can be effectively improved; and the wireless rate is adaptively adjusted according to the wireless signal strength, which is beneficial to improving the efficiency of data transmission.
Drawings
Fig. 1 is a schematic flow chart of a cellular communication method based on the LoRa technology in an embodiment of the application;
fig. 2 is a schematic diagram of a two-stage relay connection between a data acquisition device and a background server in an embodiment of the present application;
fig. 3 is a schematic structural diagram of a cellular communication system based on the LoRa technology in an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Referring to fig. 1-2, in this embodiment, fig. 1 shows a cellular communication method based on the LoRa technology, which includes:
the system comprises a background server and at least one data acquisition device, wherein the at least one data acquisition device comprises a first data acquisition device and a second data acquisition device; at least the LoRa wireless module is arranged in one data acquisition device, so that the efficiency of data transmission is improved, and the efficiency of invalid frequency hopping is improved.
The first data acquisition equipment comprises a first cellular module and at least one LoRa wireless module, wherein the at least one LoRa wireless module comprises a first LoRa wireless module, and the cellular module is respectively connected with the first LoRa wireless module and a background server;
the second data acquisition device comprises at least one LoRa wireless module, wherein the at least one LoRa wireless module comprises a second LoRa wireless module, and the second LoRa wireless module is connected with the first LoRa wireless module of the first data acquisition device so as to establish LoRa wireless connection between the first data acquisition device and the second data acquisition device;
a method of communication, comprising:
s1, when data acquisition equipment and a background server cannot directly carry out cellular communication, selecting an optimal route to carry out cellular communication on the data acquisition equipment and the background server;
the embodiment of the application can effectively improve the communication efficiency of the data equipment and the background server.
S2, controlling each data acquisition device to perform wireless interception at the lowest rate, and adjusting the wireless rate according to the wireless signal strength after the initiator and the receiver data acquisition devices establish LoRa wireless connection according to address matching;
in the embodiment of the application, the data acquisition equipment regularly monitors at the lowest speed, wherein the initiator data acquisition equipment wakes up in a wireless synchronous way at the lowest efficiency, the receiver data acquisition equipment performs address matching with the initiator data equipment after waking up, establishes LoRa wireless connection after the address matching is successful, and adjusts the wireless speed according to the wireless signal intensity until the communication signal intensity values of the initiator and the receiver are in a reliable transmission range. The embodiment of the application can carry out self-adaptive adjustment on the wireless rate, and is beneficial to improving the efficiency of data transmission.
And S3, before the data acquisition equipment is in wireless connection or transmits wireless data, if the current frequency is detected to meet the preset automatic frequency hopping condition, switching the current frequency to a clean channel for communication.
In the embodiment of the application, when the communication is unstable after the data acquisition equipment cannot directly communicate with the background server in the cellular network, the data acquisition equipment can wirelessly communicate with the background server through a long-distance wireless communication technology based on the LoRa wireless module, so that the communication efficiency is improved.
When the data acquisition equipment and the background server cannot directly perform cellular communication, selecting an optimal route to perform cellular communication between the data acquisition equipment and the background server, wherein the method specifically comprises the following steps:
setting a plurality of routes of each data acquisition device, and when each data acquisition device cannot directly carry out cellular communication with a background server, carrying out connection attempt according to the priority of the plurality of routes, and taking the successfully connected route as an optimal route.
In the embodiment of the application, for example, 3 routes of each data acquisition device can be set, and when the data acquisition device cannot be directly connected with the background server, connection attempts are sequentially performed according to the priority of the routes until the connection is completed. And automatically adjusting the priority of the route according to the connection history data, and specifically, taking the route which is successfully connected last time as the optimal route. According to the embodiment of the application, through the mode of the fixed route, connection attempt is carried out according to the priority of the route, so that when the data acquisition equipment cannot be directly connected with the background server due to signal coverage blind areas and unstable signal coverage, the data acquisition equipment is connected with the background server through the optimal route, and the communication efficiency between the data acquisition equipment and the background server is improved.
As a specific implementation manner of the embodiment of the present application, when the data acquisition device and the background server cannot directly perform cellular communication, selecting an optimal route to perform cellular communication between the data acquisition device and the background server, further includes:
when each data acquisition device cannot directly carry out cellular communication with the background server, sending a route searching signaling to search other data acquisition devices successfully connected with the background server, adding the data acquisition device successfully connected with the background server into a route of a sender, comprehensively sequencing the data acquisition devices of the sender according to the connection attribute, the signal strength, the lower-level route number and the historical connection state of the other data acquisition devices and the background server, and selecting an optimal route.
In the embodiment of the application, each data acquisition device can send out route searching signaling to search for the data acquisition device in a preset area nearby, the searched device is added into the route, and the optimal route is selected according to the connection attribute, the signal strength, the lower-level route number and the historical connection state of the data acquisition device and the background server, so that the data acquisition device and the background server can carry out cellular communication. According to the embodiment of the application, the data acquisition equipment initiates the route search signaling and selects the route according to the connection data, so that the data acquisition equipment can be connected with the background server through the optimal route when the data acquisition equipment cannot be directly connected with the background server due to the signal coverage dead zone and the unstable signal coverage, and the communication efficiency between the data acquisition equipment and the background server is improved.
As a specific implementation manner of the embodiment of the present application, if it is detected that the current frequency meets a preset automatic frequency hopping condition, the current frequency is switched to a clean channel for communication, specifically:
if the occupation of the signal with the current frequency reaches the preset time, initiating wireless frequency modulation broadcast signaling at the lowest speed of the default frequency, detecting a clean channel according to the wireless frequency modulation broadcast signaling, and switching the current frequency to the clean channel.
In the embodiment of the application, the wireless frequency modulation broadcast signaling is initiated at the lowest rate of the default frequency, the synchronous frequency modulation is carried out in the appointed groups of frequencies in sequence, and after the clean channel is detected, the current frequency is switched to the clean channel, so that the communication quality can be effectively improved.
As a specific implementation manner of the embodiment of the present application, the wireless transmission power of the LoRa wireless module includes 100mw, 1W, 2W and 5W.
It should be noted that, the adjustment of the wireless transmitting power can be realized by designing different LoRa wireless transmitting circuits, so that the data acquisition equipment can be connected with the background server and in cellular communication in various complex application environments.
As a specific implementation mode of the embodiment of the application, the embodiment of the application can be applied to the field of remote meter reading of the water meter so as to solve the problem that the cellular network cannot communicate due to relative sealing of a water meter room.
In order to further improve the communication efficiency between the data equipment and the background server, the data acquisition equipment can be accessed into the background in a one-stage to multi-stage relay mode. Fig. 2 is a schematic diagram of a two-stage relay connection between a data acquisition device and a background server according to an embodiment of the present application.
The embodiment of the application has the following beneficial effects:
according to the embodiment of the application, when the data acquisition equipment and the background server cannot directly carry out cellular communication, the data acquisition equipment and the background server are subjected to cellular communication by selecting the optimal route, so that the communication efficiency between the data acquisition equipment and the background server can be effectively improved; and the wireless rate is adaptively adjusted according to the wireless signal strength, which is beneficial to improving the efficiency of data transmission.
Referring to fig. 3, in an embodiment of the present application, fig. 3 shows a cellular communication system based on the LoRa technology, which includes:
the system comprises a background server and at least one data acquisition device, wherein the at least one data acquisition device comprises a first data acquisition device and a second data acquisition device; at least the LoRa wireless module is arranged in one data acquisition device, so that the efficiency of data transmission is improved, and the efficiency of invalid frequency hopping is improved.
The first data acquisition equipment comprises a first cellular module and at least one LoRa wireless module, wherein the at least one LoRa wireless module comprises a first LoRa wireless module, and the cellular module is respectively connected with the first LoRa wireless module and a background server;
the second data acquisition device comprises at least one LoRa wireless module, wherein the at least one LoRa wireless module comprises a second LoRa wireless module, and the second LoRa wireless module is connected with the first LoRa wireless module of the first data acquisition device so as to establish LoRa wireless connection between the first data acquisition device and the second data acquisition device;
data acquisition equipment still includes:
the route selection module is used for selecting an optimal route to carry out cellular communication on the data acquisition equipment and the background server when the data acquisition equipment and the background server cannot carry out cellular communication directly;
the embodiment of the application can effectively improve the communication efficiency of the data equipment and the background server.
The rate adjustment module is used for controlling each data acquisition device to perform wireless interception at the lowest rate, and adjusting the wireless rate according to the wireless signal intensity after the initiator and the receiver data acquisition devices establish LoRa wireless connection according to address matching;
in the embodiment of the application, the data acquisition equipment regularly monitors at the lowest speed, wherein the initiator data acquisition equipment wakes up in a wireless synchronous way at the lowest efficiency, the receiver data acquisition equipment performs address matching with the initiator data equipment after waking up, establishes LoRa wireless connection after the address matching is successful, and adjusts the wireless speed according to the wireless signal intensity until the communication signal intensity values of the initiator and the receiver are in a reliable transmission range. The embodiment of the application can carry out self-adaptive adjustment on the wireless rate, and is beneficial to improving the efficiency of data transmission.
And the channel switching module is used for switching the current frequency to a clean channel for communication if the current frequency is detected to meet the preset automatic frequency hopping condition before the data acquisition equipment is in wireless connection or transmits wireless data.
In the embodiment of the application, when the communication is unstable after the data acquisition equipment cannot directly communicate with the background server in the cellular network, the data acquisition equipment can wirelessly communicate with the background server through a long-distance wireless communication technology based on the LoRa wireless module, so that the communication efficiency is improved.
As a specific implementation manner of the embodiment of the present application, a routing module is used for:
setting a plurality of routes of each data acquisition device, and when each data acquisition device cannot directly carry out cellular communication with a background server, carrying out connection attempt according to the priority of the plurality of routes, and taking the successfully connected route as an optimal route.
In the embodiment of the application, for example, 3 routes of each data acquisition device can be set, and when the data acquisition device cannot be directly connected with the background server, connection attempts are sequentially performed according to the priority of the routes until the connection is completed. And automatically adjusting the priority of the route according to the connection history data, and specifically, taking the route which is successfully connected last time as the optimal route. According to the embodiment of the application, through the mode of fixed routing and according to the priority of the routing, connection attempt is carried out, so that when the data acquisition equipment cannot be directly connected with the background server due to signal coverage blind areas and unstable signal coverage, the data acquisition equipment is connected with the background server through the optimal routing, and the communication efficiency between the data acquisition equipment and the background server is improved.
As a specific implementation manner of the embodiment of the present application, the routing module is further configured to:
when each data acquisition device cannot directly carry out cellular communication with the background server, sending a route searching signaling to search other data acquisition devices successfully connected with the background server, adding the data acquisition device successfully connected with the background server into a route of a sender, comprehensively sequencing the data acquisition devices of the sender according to the connection attribute, the signal strength, the lower-level route number and the historical connection state of the other data acquisition devices and the background server, and selecting an optimal route.
In the embodiment of the application, each data acquisition device can send out route searching signaling to search for the data acquisition device in a preset area nearby, the searched device is added into the route, and the optimal route is selected according to the connection attribute, the signal strength, the lower-level route number and the historical connection state of the data acquisition device and the background server, so that the data acquisition device and the background server can carry out cellular communication. According to the embodiment of the application, the data acquisition equipment initiates the route search signaling and selects the route according to the connection data, so that the data acquisition equipment can be connected with the background server through the optimal route when the data acquisition equipment cannot be directly connected with the background server due to the signal coverage dead zone and the unstable signal coverage, and the communication efficiency between the data acquisition equipment and the background server is improved.
As a specific implementation manner of the embodiment of the present application, the channel switching module is further configured to:
if the occupation of the signal with the current frequency reaches the preset time, initiating wireless frequency modulation broadcast signaling at the lowest speed of the default frequency, detecting a clean channel according to the wireless frequency modulation broadcast signaling, and switching the current frequency to the clean channel.
In the embodiment of the application, the wireless frequency modulation broadcast signaling is initiated at the lowest rate of the default frequency, the synchronous frequency modulation is carried out in the appointed groups of frequencies in sequence, and after the clean channel is detected, the current frequency is switched to the clean channel, so that the communication quality can be effectively improved.
As a specific implementation manner of the embodiment of the present application, the wireless transmission power of the LoRa wireless module includes 100mw, 1W, 2W and 5W.
It should be noted that, the adjustment of the wireless transmitting power can be realized by designing different LoRa wireless transmitting circuits, so that the data acquisition equipment can be connected with the background server and in cellular communication in various complex application environments.
As a specific implementation mode of the embodiment of the application, the embodiment of the application can be applied to the field of remote meter reading of the water meter so as to solve the problem that the cellular network cannot communicate due to relative sealing of a water meter room.
In order to further improve the communication efficiency between the data equipment and the background server, the data acquisition equipment can be accessed into the background in a one-stage to multi-stage relay mode. Fig. 2 is a schematic diagram of a two-stage relay connection between a data acquisition device and a background server according to an embodiment of the present application.
The embodiment of the application has the following beneficial effects:
according to the embodiment of the application, when the data acquisition equipment and the background server cannot directly carry out cellular communication, the data acquisition equipment and the background server are subjected to cellular communication by selecting the optimal route, so that the communication efficiency between the data acquisition equipment and the background server can be effectively improved; and the wireless rate is adaptively adjusted according to the wireless signal strength, which is beneficial to improving the efficiency of data transmission.
The foregoing is a preferred embodiment of the present application and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present application and are intended to be comprehended within the scope of the present application.

Claims (6)

1. A cellular communication method based on LoRa technology, comprising:
the system comprises a background server, at least one data acquisition device and a LoRa wireless repeater, wherein each data acquisition device comprises a cellular module and at least one LoRa wireless module, and at least one data acquisition device comprises a first data acquisition device and a second data acquisition device;
the first data acquisition equipment comprises a first cellular module and at least one LoRa wireless module, wherein the at least one LoRa wireless module comprises a first LoRa wireless module, and the cellular module is respectively connected with the first LoRa wireless module and the background server;
the second data acquisition device comprises a second cellular module and at least one LoRa wireless module, wherein the at least one LoRa wireless module comprises a second LoRa wireless module, and the second LoRa wireless module is connected with a first LoRa wireless module of the first data acquisition device so as to establish a LoRa wireless connection between the first data acquisition device and the second data acquisition device; the communication method comprises the following steps:
when the data acquisition equipment and the background server cannot directly carry out cellular communication, selecting an optimal route, and carrying out cellular communication on the data acquisition equipment and the background server;
controlling each data acquisition device to perform wireless interception at the lowest rate, and adjusting the wireless rate according to the wireless signal strength after the initiator and the receiver data acquisition devices establish LoRa wireless connection according to address matching;
before the data acquisition equipment is in wireless connection or transmits wireless data, if the current frequency is detected to meet the preset automatic frequency hopping condition, switching the current frequency to a clean channel for communication;
the selection rule of the optimal route comprises the following steps:
setting a plurality of routes of each data acquisition device, and when each data acquisition device and the background server cannot directly carry out cellular communication, carrying out connection attempt according to the priorities of the plurality of routes, and taking the successfully connected route as an optimal route;
or alternatively, the process may be performed,
when each data acquisition device cannot directly carry out cellular communication with the background server, sending a route searching signaling to search other data acquisition devices successfully connected with the background server, adding the data acquisition devices successfully connected with the background server into a route of a sender, and comprehensively sequencing the data acquisition devices of the sender according to the connection attribute, the signal strength, the lower-level route quantity and the historical connection state of the other data acquisition devices and the background server to select an optimal route;
the step of communicating the data acquisition device with the background server in a cellular manner comprises:
after the second LoRa wireless module of the second data acquisition device establishes a LoRa wireless connection with the first LoRa wireless module of the first data acquisition device through a plurality of other data acquisition devices or LoRa wireless repeaters, a multistage relay connection is established with a background server through the first cellular module of the first data acquisition device so as to enable the second data acquisition device to communicate with the background server; and the selection of the other data acquisition equipment and the LoRa wireless repeater is determined according to the selection rule of the optimal route.
2. The cellular communication method according to claim 1, wherein if it is detected that the current frequency meets a preset automatic frequency hopping condition, switching the current frequency to a clean channel for communication, specifically:
if the occupation of the signal with the current frequency reaches the preset time, initiating a wireless frequency modulation broadcast signaling at the lowest speed of the default frequency, detecting a clean channel according to the wireless frequency modulation broadcast signaling, and switching the current frequency to the clean channel.
3. The cellular communication method according to claim 1, wherein the radio transmission power of the LoRa radio module comprises 100mw, 1W, 2W, and 5W.
4. A cellular communication system based on LoRa technology, comprising:
the system comprises a background server, at least one data acquisition device and a LoRa wireless repeater, wherein each data acquisition device comprises a cellular module and at least one LoRa wireless module, and at least one data acquisition device comprises a first data acquisition device and a second data acquisition device;
the first data acquisition equipment comprises a first cellular module and at least one LoRa wireless module, wherein the at least one LoRa wireless module comprises a first LoRa wireless module, and the cellular module is respectively connected with the first LoRa wireless module and the background server;
the second data acquisition device comprises a second cellular module and at least one LoRa wireless module, wherein the at least one LoRa wireless module comprises a second LoRa wireless module, and the second LoRa wireless module is connected with a first LoRa wireless module of the first data acquisition device so as to establish a LoRa wireless connection between the first data acquisition device and the second data acquisition device;
the data acquisition device further comprises:
the route selection module is used for selecting an optimal route when the data acquisition equipment and the background server cannot directly carry out cellular communication, and carrying out cellular communication on the data acquisition equipment and the background server;
the rate adjustment module is used for controlling each data acquisition device to perform wireless interception at the lowest rate, and adjusting the wireless rate according to the wireless signal intensity after the initiator and the receiver data acquisition devices establish LoRa wireless connection according to address matching;
the channel switching module is used for switching the current frequency to a clean channel for communication if the current frequency is detected to meet the preset automatic frequency hopping condition before the data acquisition equipment is in wireless connection or transmits wireless data;
wherein the selection rule of the optimal route comprises
Setting a plurality of routes of each data acquisition device, and when each data acquisition device and the background server cannot directly carry out cellular communication, carrying out connection attempt according to the priorities of the plurality of routes, and taking the successfully connected route as an optimal route;
or alternatively, the process may be performed,
when each data acquisition device cannot directly carry out cellular communication with the background server, sending a route searching signaling to search other data acquisition devices successfully connected with the background server, adding the data acquisition devices successfully connected with the background server into a route of a sender, and comprehensively sequencing the data acquisition devices of the sender according to the connection attribute, the signal strength, the lower-level route quantity and the historical connection state of the other data acquisition devices and the background server to select an optimal route;
the routing module is specifically configured to:
after the second LoRa wireless module of the second data acquisition device establishes a LoRa wireless connection with the first LoRa wireless module of the first data acquisition device through a plurality of other data acquisition devices or LoRa wireless repeaters, a multistage relay connection is established with a background server through the first cellular module of the first data acquisition device so as to enable the second data acquisition device to communicate with the background server; and the selection of the other data acquisition equipment and the LoRa wireless repeater is determined according to the selection rule of the optimal route.
5. The cellular communication system of claim 4, wherein said channel switching module is further configured to:
if the occupation of the signal with the current frequency reaches the preset time, initiating a wireless frequency modulation broadcast signaling at the lowest speed of the default frequency, detecting a clean channel according to the wireless frequency modulation broadcast signaling, and switching the current frequency to the clean channel.
6. The cellular communication system according to claim 4, wherein the wireless transmit power of the LoRa wireless module comprises 100mw, 1W, 2W, and 5W.
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