CN111181664A - LORA device communication method, device and medium - Google Patents
LORA device communication method, device and medium Download PDFInfo
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- CN111181664A CN111181664A CN202010010702.3A CN202010010702A CN111181664A CN 111181664 A CN111181664 A CN 111181664A CN 202010010702 A CN202010010702 A CN 202010010702A CN 111181664 A CN111181664 A CN 111181664A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/318—Received signal strength
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/382—Monitoring; Testing of propagation channels for resource allocation, admission control or handover
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Abstract
The invention discloses a communication method, a communication device, communication equipment and a communication medium of LORA equipment, which are widely applied to the technical field of wireless communication. The LORA device communication method comprises the following steps: the LORA equipment randomly selects a communication channel, judges the signal receiving intensity of the communication channel, detects channel activity, judges whether the communication connection state of the communication channel is idle or busy, and sends data through the communication channel if the communication connection state is judged to be idle; and if the communication connection state is judged to be busy, the communication connection state of the communication channel is judged again after waiting for a first preset time, and if the communication connection state is still busy after the judgment of the communication connection state for a preset number of times, other communication channels are selected after waiting for a second preset time. The invention solves the problem of equipment interference existing in the communication connection of the LORA equipment.
Description
Technical Field
The present invention relates to the field of wireless communication technologies, and in particular, to a method, an apparatus, a device, and a medium for communication of an LORA device.
Background
With the development of society, each wireless spectrum is filled with wireless devices due to the application of a large number of wireless network devices, and spectrum interference is easily generated, but the existing Long Range Radio (LORA) devices do not have a method for collision avoidance during device communication connection during communication connection, so that a communication method for LORA devices needs to be provided, so that the effect of collision avoidance during communication of LORA devices is achieved, and the problem of device interference during communication connection of LORA devices is solved.
Disclosure of Invention
The invention aims to solve the technical problems in the prior art. Therefore, the invention provides a communication method of the LORA equipment, which can solve the problem of equipment interference when the LORA equipment is in communication connection.
The invention also provides an LORA device corresponding to the communication method of the LORA equipment.
The invention also provides the LORA equipment corresponding to the communication method of the LORA equipment.
The invention also provides a computer readable storage medium corresponding to the LORA device communication method.
In a first aspect, a technical solution adopted in an embodiment of the present invention is a communication method for LORA devices, including: the LORA equipment randomly selects a communication channel; judging the communication connection state of the communication channel; if the communication connection state is judged to be idle, sending data through the communication channel; and if the communication connection state is judged to be busy, judging the communication connection state of the communication channel again after waiting for a first preset time, and if the communication connection state is still busy after judging the communication connection state for a preset number of times, selecting other communication channels.
Further, the LORA device randomly selects a communication channel, including: the LORA device sets a receive window according to a channel frequency of the communication channel; measuring the signal strength of the channel signal received by the receiving window; if the signal intensity is larger than a preset threshold value, reselecting other communication channels; and if the signal intensity is less than or equal to a preset threshold value, determining to select the communication channel.
Further, the measuring the signal strength of the channel signal received by the receiving window includes: the signal strength is measured by a received signal strength indication.
Further, after the determining to select the communication channel, the method further includes: the LORA device generating a spreading factor; the spreading factor is used for adjusting the data transmission distance and the data transmission rate; and the LORA equipment detects the channel activity according to the spreading factor and the frequency of the communication channel and is used for judging the communication connection state of the communication channel.
In a second aspect, an embodiment of the present invention provides a LORA apparatus, including: a selecting module for selecting a communication channel; the judging module is used for judging the signal intensity of the channel signal received by the receiving window and the communication connection state of the selected communication channel; and the sending module is used for sending data through the communication channel.
Further, the determination module includes: the device comprises a signal strength judging module and a communication channel judging module; the signal strength judging module is used for judging the signal strength of the channel signal received by the receiving window; and the communication channel judging module is used for judging the communication connection state of the selected communication channel.
In a third aspect, an embodiment of the present invention provides an LORA apparatus, including: at least one processor, and a memory communicatively coupled to the at least one processor;
wherein the processor is configured to execute the LORA device communication method according to the first aspect by calling a computer program stored in the memory.
In a fourth aspect, an embodiment of the present invention is directed to a computer-readable storage medium, where computer-executable instructions are stored, and the computer-executable instructions are configured to cause a computer to execute a LORA device communication method according to the first aspect.
The embodiment of the invention has the following beneficial effects:
the invention discloses a communication method, a communication device, communication equipment and a communication medium for LORA equipment. The LORA device communication method comprises the following steps: through selecting the communication channel and judging the communication connection state of the communication channel, the idle communication channel is selected to carry out communication of the LORA equipment, the effect of collision avoidance during communication connection of the LORA equipment is realized, and the problem of communication interference of the LORA equipment during communication connection is solved.
Drawings
Fig. 1 is a flowchart illustrating an embodiment of a communication method of a LORA device according to the present invention;
fig. 2 is a flow chart illustrating another embodiment of a LORA device communication method of the present invention;
fig. 3 is a block diagram of a LORA device according to an embodiment of the present invention.
Detailed Description
The concept and technical effects of the present invention will be clearly and completely described below in conjunction with the embodiments to fully understand the objects, features and effects of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and those skilled in the art can obtain other embodiments without inventive effort based on the embodiments of the present invention, and all embodiments are within the protection scope of the present invention.
In the description of the present invention, if an orientation description is referred to, for example, the orientations or positional relationships indicated by "upper", "lower", "front", "rear", "left", "right", etc. are based on the orientations or positional relationships shown in the drawings, only for convenience of describing the present invention and simplifying the description, but not for indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. If a feature is referred to as being "disposed," "secured," "connected," or "mounted" to another feature, it can be directly disposed, secured, or connected to the other feature or indirectly disposed, secured, connected, or mounted to the other feature.
In the description of the embodiments of the present invention, if "a number" is referred to, it means one or more, if "a plurality" is referred to, it means two or more, if "greater than", "less than" or "more than" is referred to, it is understood that the number is not included, and if "greater than", "lower" or "inner" is referred to, it is understood that the number is included. If reference is made to "first" or "second", this should be understood to distinguish between features and not to indicate or imply relative importance or to implicitly indicate the number of indicated features or to implicitly indicate the precedence of the indicated features.
In a first aspect, an embodiment of the present invention provides a communication method for LORA devices. The communication method of the LORA equipment can realize the effect of collision avoidance during communication connection of the LORA equipment and solve the problem of communication interference existing during communication connection of the LORA equipment.
Fig. 1 is a schematic flow chart illustrating a LORA device communication method according to an embodiment of the present invention.
The method comprises the following specific steps:
s1100, selecting a communication channel;
s1200, measuring the strength of the received signal;
s1300, setting a communication channel temporarily;
s1400, detecting channel activity;
and S1500, sending the data.
In step S1100, when the LORA device is ready to transmit data, one communication channel is randomly selected from a plurality of (e.g., 8) communication channels of the LORA device, and in step S1200, the received signal strength measurement is performed on the selected communication channel to determine whether the selected communication channel can be used by the LORA device to transmit data.
In step S1200, the LORA device sets a short-time (e.g., 10ms) receiving window according to the selected communication channel frequency, measures the received signal strength of the signal receiving window, and determines whether the signal strength of the channel signal received by the receiving window is less than or equal to a preset threshold, where the received channel signal strength may be an interference signal from the outside.
In some embodiments, measuring the Signal Strength of the Received channel Signal may be performed by receiving a Signal Strength Indication (RSSI).
In some embodiments, the stronger the signal strength of the received signal is measured, the stronger the channel signal received by the communication channel, that is, the stronger the external interference signal is received, the less the communication channel can be used as a communication channel for transmitting data, and vice versa. And, a preset threshold value of proper signal strength can be set by itself to judge whether the communication channel can be used for the LORA device to transmit data.
In some embodiments, if the measured received signal strength is less than or equal to the preset threshold, step S1300 is performed, and the communication channel is tentatively set as a communication channel for the LORA device to send data; if the measured received signal strength is greater than the preset threshold, the process returns to step S1100, and another communication channel of the LORA device is reselected. By measuring the signal strength of the channel signal, the capability of the selected communication channel for receiving and sending data is ensured, and the selected communication channel can normally communicate.
In step S1300, the measured signal strength of the communication channel is equal to or less than the preset threshold, which indicates that the communication channel can be used by the LORA device to transmit data, and therefore the communication channel is tentatively set as the transmission channel.
In some embodiments, in step S1300 and step S1400, the method further includes:
step S1310, the LORA device generates a Spreading Factor (SF), determines a value of the spreading factor, specifically, a value range of the spreading factor is 7 to 12, and may determine a corresponding data transmission rate and a corresponding data transmission distance according to the value of the spreading factor. And the smaller the value of the spreading factor, the faster the data transmission rate and the smaller the data transmission distance of the LORA device. After the value of the spreading factor is generated and determined, the value of the spreading factor is not changed any more, and the LORA device performs the channel activity detection in step S1400 according to the spreading factor and the frequency of the selected communication channel.
In step S1400, the LORA device performs channel activity detection, and determines whether the communication connection state of the communication channel is idle or busy.
In some embodiments, in step S1400, the performing, by the LORA device, channel activity detection specifically includes: after the LORA equipment updates the status register, interrupt updating is generated, and whether the communication channel is busy or not can be known by reading the value of the status register after the interrupt updating.
In some embodiments, if the communication connection state of the communication channel is determined to be idle, the LORA device transmits data through the communication channel; if the communication connection state of the communication channel is judged to be busy, the communication connection state of the communication channel is judged again after waiting for a first preset time (such as within 0-100 ms); if the communication connection status of the communication channel is still busy after the preset number of times (e.g., 3 times), the LORA device waits for a second preset time (e.g., within 0-100 ms), and then returns to step S1100 to reselect another communication channel on the LORA device.
Referring to fig. 2, fig. 2 is a flowchart illustrating a communication method of a LORA device according to another embodiment of the present invention.
When the LORA device is ready to send data, one communication channel is randomly selected from a plurality of (for example, 8) communication channels of the LORA device, a Signal receiving window of a short time is set according to the frequency of the communication channel, the Signal strength of the Received channel Signal is measured through a Received Signal Strength Indication (RSSI) in the Signal receiving window, and whether the Signal strength of the Received channel Signal is smaller than or equal to a preset threshold value is measured.
If the measured signal intensity of the received channel signal is less than or equal to a preset threshold value, temporarily setting the communication channel as a communication channel for sending data; and if the measured signal intensity of the received channel signal is greater than the preset threshold value, reselecting other communication channels on the LORA equipment, and measuring the received signal intensity of the communication channels again.
When the tentatively selected communication channel is a communication channel for transmitting data, the LORA device generates a spreading factor and determines a value of the spreading factor. And adjusting the data transmission rate and the data transmission distance according to the value of the spreading factor, wherein the value of the spreading factor is specifically in the range of 7 to 12, and the corresponding data transmission rate and the corresponding data transmission distance can be determined according to the value of the spreading factor. The smaller the value of the spreading factor, the faster the data transfer rate and the smaller the data transfer distance of the LORA device, and vice versa.
And after the value of the spreading factor is generated and determined, the value of the spreading factor is not changed any more, and the LORA equipment carries out channel activity detection according to the spreading factor and the frequency of the selected communication channel.
The LORA device detects whether the communication connection state of the selected communication channel is idle or busy, and if the communication connection state of the communication channel is judged to be idle, the LORA device sends data through the communication channel; if the communication connection state of the communication channel is judged to be busy, the communication connection state of the communication channel is judged again after waiting for a first preset time (such as within 0-100 ms); if the communication connection status of the communication channel is still busy after the preset number of times (e.g., 3 times), the LORA device waits for a second preset time (e.g., within 0-100 ms), and then returns to step S1100 to reselect another communication channel on the LORA device.
According to the embodiment of the invention, the communication channel is selected, the communication connection state of the communication channel is judged, and the idle communication channel is selected to carry out communication of the LORA equipment, so that the collision avoidance effect during communication of the LORA equipment is realized, and the problem of communication interference of the LORA equipment during communication connection is solved.
In a second aspect, an embodiment of the present invention further provides a LORA apparatus, with reference to fig. 3, including: the selecting module 100, the determining module 200, and the sending module 300 are applied to the LORA device communication method mentioned in the first aspect.
A selecting module 100, configured to select a communication channel by the LORA device;
a determining module 200, configured to determine a signal strength of a channel signal received by a receiving window set in a communication channel and a communication connection state of the communication channel tentatively serving as a sending channel;
a sending module 300, configured to send data through a communication channel with a communication connection status of idle by the LORA device.
In some embodiments, the decision module 200 includes: a signal strength decision module 210 and a communication channel decision module 220;
a signal strength determining module 210, configured to determine a signal strength of a channel signal received by a receiving window;
a communication channel determining module 220, configured to determine a communication connection status of the selected communication channel in the channel activity detection.
The above-mentioned specific details of the selecting module 100, the determining module 200, and the sending module 300 have been described in detail in the LORA communication method mentioned in the first aspect, and therefore are not described herein again.
In a third aspect, an embodiment of the present invention further provides an LORA device, including: at least one processor, and a memory communicatively coupled to the at least one processor;
wherein the processor is configured to execute the LORA device communication method mentioned in the first embodiment by calling a computer program stored in the memory.
The memory, which is a non-transitory computer readable storage medium, may be used to store non-transitory software programs and non-transitory computer executable programs, such as the LORA device communication method in the embodiments of the first aspect of the present invention. The processor implements the LORA device communication method in the first aspect of the embodiment described above by executing a non-transitory software program and instructions stored in the memory.
The memory may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data for performing the LORA device communication method in the embodiment of the first aspect. Further, the memory may include high speed random access memory, and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, the memory optionally includes memory located remotely from the processor, and these remote memories may be connected to the terminal over a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The non-transitory software programs and instructions required to implement the LORA device communication method in the first aspect of the embodiment described above are stored in a memory and, when executed by one or more processors, perform the LORA device communication method in the first aspect of the embodiment described above.
In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium storing computer-executable instructions for: performing the LORA device communication method of the first aspect;
in some embodiments, the computer-readable storage medium stores computer-executable instructions that are executed by one or more control processors, for example, by one of the LORA devices of the third aspect, and cause the one or more processors to perform the LORA device communication method of the first aspect.
The above-described embodiments of the apparatus are merely illustrative, wherein the units illustrated as separate components may or may not be physically separate, i.e. may be located in one place, or may also be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
One of ordinary skill in the art will appreciate that all or some of the steps, systems, and methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as is well known to those of ordinary skill in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, Digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as known to those skilled in the art.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention. Furthermore, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.
Claims (8)
1. A LORA device communication method, comprising:
the LORA equipment randomly selects a communication channel;
judging the communication connection state of the communication channel;
if the communication connection state is judged to be idle, sending data through the communication channel;
and if the communication connection state is judged to be busy, judging the communication connection state of the communication channel again after waiting for a first preset time, and if the communication connection state is still busy after judging the communication connection state for a preset number of times, selecting other communication channels after waiting for the first preset time.
2. The LORA device communication method of claim 1, wherein the LORA device randomly selects a communication channel, comprising:
the LORA device sets a receiving window according to the channel frequency of the communication channel;
measuring the signal strength of the channel signal received by the receiving window;
if the signal intensity is larger than a preset threshold value, reselecting other communication channels;
and if the signal intensity is less than or equal to a preset threshold value, determining to select the communication channel.
3. The LORA device communication method of claim 2, wherein said measuring the signal strength of the channel signal received by the receive window comprises: the signal strength is measured by a received signal strength indication.
4. The LORA device communication method of claim 3, wherein the determining to select the communication channel further comprises:
the LORA device generating a spreading factor; the spreading factor is used for adjusting the data transmission distance and the data transmission rate;
and the LORA equipment detects the channel activity according to the spreading factor and the frequency of the communication channel and is used for judging the communication connection state of the communication channel.
5. A LORA apparatus, applied to the LORA device communication method according to any one of claims 1 to 4, comprising:
a selecting module for selecting a communication channel;
the judging module is used for judging the signal intensity of the channel signal received by the receiving window and the communication connection state of the selected communication channel;
and the sending module is used for sending data through the communication channel.
6. The LORA device of claim 5, wherein the determining module comprises:
the device comprises a signal strength judging module and a communication channel judging module;
the signal strength judging module is used for judging the signal strength of the channel signal received by the receiving window;
and the communication channel judging module is used for judging the communication connection state of the selected communication channel.
7. A LORA device, comprising:
at least one processor, and a memory communicatively coupled to the at least one processor;
wherein the processor is configured to perform the LORA device communication method of any of claims 1-4 by invoking a computer program stored in the memory.
8. A computer-readable storage medium having stored thereon computer-executable instructions for causing a computer to perform the LORA device communication method of any of claims 1-4.
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| CN202010010702.3A CN111181664A (en) | 2020-01-06 | 2020-01-06 | LORA device communication method, device and medium |
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| CN202010010702.3A CN111181664A (en) | 2020-01-06 | 2020-01-06 | LORA device communication method, device and medium |
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