CN108024369B - Wireless channel selection method, device and wireless gateway - Google Patents
Wireless channel selection method, device and wireless gateway Download PDFInfo
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- H04W72/50—Allocation or scheduling criteria for wireless resources
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- H—ELECTRICITY
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- H04W—WIRELESS COMMUNICATION NETWORKS
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- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
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Abstract
The embodiment of the invention provides a method, a device and a wireless gateway for selecting a wireless channel, wherein the method comprises the following steps: receiving detection messages which are sent to a wireless gateway by all terminals in a region through a channel randomly selected from all authorization-free channels and forwarded by the wireless gateway until all authorization-free channels are selected at least once as channels for sending the detection messages, determining a first channel according to attribute information of the detection messages, acquiring all authorization-free channel information in the region from the wireless gateway, generating a channel list according to a preset strategy, indicating the wireless gateway to send the channel list to all terminals through the first channel, so that the terminals judge whether the channels in the channel list meet use conditions according to the channel list, and carrying out wireless communication with the wireless gateway according to a judgment result. In a complex wireless environment, a suitable wireless channel can be effectively determined for a wireless device.
Description
Technical Field
The present invention relates to the field of data communications, and in particular, to a method and an apparatus for selecting a wireless channel, and a wireless gateway.
Background
The internet of things is an important component of a new generation of information technology, and as the name suggests, the internet of things is formed by connecting objects and things. This has two layers: firstly, the core and the foundation of the internet of things are still the internet, and the internet is an extended and expanded network on the basis of the internet; and secondly, the user side extends and expands to any article to perform information exchange and communication, namely, the article information. The purpose is to connect all articles with the network, which is convenient for identification and management. The Internet of things is widely applied to network fusion through technologies such as intelligent sensing and identification.
The internet of things is an application expansion of the internet, and is not a network, but a business and an application. Wherein, the Low-Power Wide-Area Network (LPWAN) is an important component of the Internet of things. The wireless sensor network data transmission system has the characteristics of small size, low power consumption, long transmission distance, strong anti-interference capability and the like, is mainly used for long distance, has very low power consumption requirement, has less strict requirements on data rate and data delay, and has higher requirements on reliability and anti-interference capability. The method is widely applied to the field of remote low-rate Internet of things wireless communication in various occasions. Such as automatic meter reading, building automation equipment, wireless security systems, industrial monitoring and control, etc.
The Lora technology has the characteristics of long transmission distance, low power consumption, strong anti-interference performance and the like, and is an important technical component of the current LPWAN. The Lora technology utilizes a spread spectrum debugging mode, has better anti-interference capability compared with the traditional FSK (Frequency-shift keying) debugging, can demodulate SIGNALs under the background NOISE, and can still demodulate SIGNALs under the condition of low SNR (Signal-NOISE RATIO). Meanwhile, the spread spectrum codes (SF) of Lora are mutually orthogonal, so that the signals can be multiplexed in the same channel, and the capacity is greatly improved.
The current Lora technology is based on the MAC layer protocol of the Lora technology, and channels are randomly distributed and used under the condition that the local spectrum distribution and supervision requirements are met; in this case, the Lora network may have problems such as network instability and performance degradation due to mutual interference of radio channels.
Disclosure of Invention
In order to solve the technical problem, the embodiment of the invention adopts the following technical scheme:
a method of wireless channel selection, comprising: receiving detection messages which are sent to a wireless gateway by all terminals in a region through a channel arbitrarily selected from all the authorization-free channels and forwarded by the wireless gateway until all the authorization-free channels are selected at least once as channels for sending the detection messages, determining a first channel according to the attribute information of the detection messages,
acquiring all the information of the authorization-free channels in the area from the wireless gateway, generating a channel list according to a preset strategy and the channel information,
and indicating the wireless gateway to send the channel list to all terminals through the first channel, so that the terminals judge whether the channels in the channel list meet the use conditions according to the channel list and carry out wireless communication with the wireless gateway according to the judgment result.
Optionally, the attribute information includes at least one of RSSI, timestamp, phase, or SNR of the packet.
Optionally, the step of determining the first channel according to the attribute information of the probe packet includes: sorting according to the RSSI of all the unlicensed channels, selecting n unlicensed channels with the highest RSSI, and selecting a channel with the SNR value being the second among the n channels as a first channel according to the SNR of the n channels, wherein n is a natural number which is more than or equal to 3.
Optionally, the step of obtaining all the unlicensed channel information in the area from the wireless gateway, and generating a channel list according to a predetermined policy and the channel information includes:
when the wireless gateway starts a scanning mode, after channel bottom noise information of all unlicensed frequency bands in the region is collected, a list containing the channel bottom noise information and channel frequencies corresponding to the channel bottom noise information is obtained, the difference value between each channel bottom noise information in the list and a preset threshold value is sorted, and a working channel list is determined according to the sorting result.
Optionally, the step of instructing the wireless gateway to send the channel list to all terminals through the first channel, so that the terminals determine whether the channels in the channel list satisfy the use condition according to the channel list, and perform wireless communication with the wireless gateway according to the determination result specifically includes:
the wireless gateway is instructed to broadcast the working channel list to all terminals through the first channel, so that the terminals can judge whether the channels in the working channel list meet the use conditions or not according to the channel list, and when the channels in the channel list meet the use conditions, one channel is randomly selected from the working channel list to carry out wireless communication with the wireless gateway; and when the channels in the working channel list do not meet the use conditions, starting a random avoidance mechanism to carry out wireless communication with the wireless gateway.
The embodiment of the invention also provides a device for selecting the wireless channel, which comprises:
a receiving module, configured to receive a probe packet sent to a wireless gateway by all terminals in an area through a channel arbitrarily selected from all unlicensed channels and forwarded by the wireless gateway, until all unlicensed channels are selected at least once as channels for sending the probe packet,
a determining module, configured to determine a first channel according to the attribute information of the probe packet,
an obtaining module, configured to obtain all unlicensed channel information in the area from the wireless gateway,
a generating module for generating a channel list according to a predetermined policy and the channel information,
and the indicating module is used for indicating the wireless gateway to send the channel list to all terminals through the first channel, so that the terminals can judge whether the channels in the channel list meet the use conditions according to the channel list and carry out wireless communication with the wireless gateway according to the judgment result.
Optionally, the attribute information includes at least one of RSSI, timestamp, phase, or SNR of the packet.
Optionally, the determining module is specifically configured to: sorting according to the RSSI of all the unlicensed channels, selecting n unlicensed channels with the highest RSSI, and selecting a channel with the SNR value being the second among the n channels as a first channel according to the SNR of the n channels, wherein n is a natural number which is more than or equal to 3.
Alternatively to this, the first and second parts may,
the obtaining module is specifically configured to, when the wireless gateway starts a scanning mode and collects channel noise floor information of all unlicensed frequency bands in the area, obtain a list including the channel noise floor information and channel frequencies corresponding to the channel noise floor information,
the generating module is specifically configured to sort the difference between the bottom noise information of each channel in the list and a preset threshold, and determine a working channel list according to a result of the sorting.
Optionally, the indication module is specifically configured to:
the wireless gateway is instructed to broadcast the working channel list to all terminals through the first channel, so that the terminals can judge whether the channels in the working channel list meet the use conditions or not according to the channel list, and when the channels in the channel list meet the use conditions, one channel is randomly selected from the working channel list to carry out wireless communication with the wireless gateway; and when the channels in the working channel list do not meet the use conditions, starting a random avoidance mechanism to carry out wireless communication with the wireless gateway.
An embodiment of the present invention further provides a wireless gateway, including:
the message forwarding module is used for receiving detection messages sent by all terminals in an area through a channel arbitrarily selected from all the authorization-free channels and forwarding the detection messages to the first server, so that the first server determines the first channel according to the attribute information of the detection messages until all the authorization-free channels are selected at least once as the channel for sending the detection messages;
a channel information sending module, configured to send all unlicensed channel information in the area to the first server, so that the first server generates a channel list according to a pre-established policy and the channel information,
and the channel list processing module is used for receiving the channel list and sending the channel list to all terminals through the first channel, so that the terminals can judge whether the channels in the channel list meet the use conditions according to the channel list and carry out wireless communication with the wireless gateway according to the judgment result.
Optionally, the attribute information includes at least one of RSSI, timestamp, phase, or SNR of the packet.
Optionally, the message forwarding module is specifically configured to receive probe messages sent by all terminals in an area through a channel arbitrarily selected from all the unlicensed channels and forward the probe messages to the first server, so that the first server sorts the received signals according to the RSSI of all the unlicensed channels, selects n unlicensed channels with the highest RSSI, and selects, as the first channel, a channel with a SNR value that is the second of the n channels according to the SNR of the n channels, where n is a natural number greater than or equal to 3 until all the unlicensed channels are selected at least once as channels for sending the probe messages.
Optionally, the wireless gateway further includes: the channel information collection module is used for starting a scanning mode and collecting channel bottom noise information of all the unlicensed frequency bands in the region;
the channel information sending module is specifically configured to send the list including the channel noise floor information and the channel frequency corresponding to the channel noise floor information to the first server, so that the first server sorts, according to a difference between each channel noise floor information in the list and a preset threshold, a working channel list is determined according to a result of the sorting.
Optionally, the channel list processing module is specifically configured to broadcast the working channel list to all terminals through the first channel, so that the terminals determine whether channels in the working channel list satisfy a use condition according to the channel list, and when the channels in the channel list satisfy the use condition, randomly select one channel from the working channel list to perform wireless communication with the wireless gateway; and when the channels in the working channel list do not meet the use conditions, starting a random avoidance mechanism to carry out wireless communication with the wireless gateway.
The embodiment of the invention has the beneficial effects that: in a complex wireless environment, an appropriate wireless channel can be effectively determined for a wireless device without using expensive handheld instruments. Meanwhile, the real-time performance of optimal channel allocation can be guaranteed, the stability and the anti-interference performance of the Lora wireless network are greatly improved, and various applications are facilitated.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a flow chart of a method according to an embodiment of the present invention;
FIG. 2 is a diagram of an apparatus according to an embodiment of the present invention;
fig. 3 is a diagram illustrating an apparatus according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
An embodiment of the present invention provides a method for selecting a wireless channel, as shown in fig. 1, including the following steps:
s101, receiving detection messages which are sent to a wireless gateway by all terminals in an area through a channel arbitrarily selected from all the authorization-free channels and forwarded by the wireless gateway until all the authorization-free channels are selected at least once as channels for sending the detection messages,
s103, determining a first channel according to the attribute information of the detection message,
s105, obtaining all the authorization-free channel information in the area from the wireless gateway,
s107, generating a channel list according to a preset strategy and the channel information,
and S109, the wireless gateway is instructed to send the channel list to all terminals through the first channel, so that the terminals judge whether the channels in the channel list meet the use conditions according to the channel list and carry out wireless communication with the wireless gateway according to the judgment result.
Optionally, the attribute information includes at least one of an RSSI (Received Signal strength indication), a timestamp, a phase, or an SNR of the packet.
Optionally, step S103 specifically includes: sorting according to the RSSI of all the unlicensed channels, selecting n unlicensed channels with the highest RSSI, and selecting a channel with the second SNR value in the n channels as a first channel according to the SNR of the n channels, wherein n is a natural number more than or equal to 3.
Optionally, step S105 specifically includes: when the wireless gateway starts a scanning mode, and after channel background noise information of all unlicensed frequency bands in the region is collected, a list containing the channel background noise information and channel frequencies corresponding to the channel background noise information is obtained.
Optionally, step S107 specifically includes:
and sorting the difference value between the bottom noise information of each channel in the list and a preset threshold value, and determining a working channel list according to the sorting result.
Optionally, step S109 specifically includes:
the wireless gateway is instructed to broadcast the working channel list to all terminals through the first channel, so that the terminals can judge whether the channels in the working channel list meet the use conditions or not according to the channel list, and when the channels in the channel list meet the use conditions, one channel is randomly selected from the working channel list to carry out wireless communication with the wireless gateway; and when the channels in the working channel list do not meet the use conditions, starting a random avoidance mechanism to carry out wireless communication with the wireless gateway.
The embodiment of the invention has the beneficial effects that: in a complex wireless environment, an appropriate wireless channel can be effectively determined for a wireless device without using expensive handheld instruments. Meanwhile, the real-time performance of optimal channel allocation can be guaranteed, the stability and the anti-interference performance of the Lora wireless network are greatly improved, and various applications are facilitated.
The present invention also provides a device for selecting a wireless channel, as shown in fig. 2, including:
a receiving module 201, configured to receive a probe packet sent to a wireless gateway by all terminals in an area through a channel arbitrarily selected from all unlicensed channels and forwarded by the wireless gateway, until all unlicensed channels are selected at least once as channels for sending the probe packet,
a determining module 203, configured to determine a first channel according to the attribute information of the probe packet,
an obtaining module 205, configured to obtain all unlicensed channel information in the area from the wireless gateway,
a generating module 207, configured to generate a channel list according to a pre-established policy and the channel information,
an indicating module 209, configured to instruct the wireless gateway to send the channel list to all terminals through the first channel, so that the terminals determine whether channels in the channel list satisfy a use condition according to the channel list, and perform wireless communication with the wireless gateway according to a determination result.
Optionally, the attribute information includes at least one of RSSI, timestamp, phase, or SNR of the packet.
Optionally, the determining module 203 is specifically configured to: sorting according to the RSSI of all the unlicensed channels, selecting n unlicensed channels with the highest RSSI, and selecting a channel with the SNR value being the second among the n channels as a first channel according to the SNR of the n channels, wherein n is a natural number which is more than or equal to 3.
Alternatively to this, the first and second parts may,
the obtaining module 205 is specifically configured to, when the wireless gateway starts a scanning mode and collects channel noise floor information of all unlicensed frequency bands in the area, obtain a list including the channel noise floor information and channel frequencies corresponding to the channel noise floor information,
the generating module 207 is specifically configured to sort the difference between the bottom noise information of each channel in the list and a preset threshold, and determine a working channel list according to a result of the sorting.
Optionally, the indicating module 209 is specifically configured to:
the wireless gateway is instructed to broadcast the working channel list to all terminals through the first channel, so that the terminals can judge whether the channels in the working channel list meet the use conditions or not according to the channel list, and when the channels in the channel list meet the use conditions, one channel is randomly selected from the working channel list to carry out wireless communication with the wireless gateway; and when the channels in the working channel list do not meet the use conditions, starting a random avoidance mechanism to carry out wireless communication with the wireless gateway.
The embodiment of the invention has the beneficial effects that: in a complex wireless environment, an appropriate wireless channel can be effectively determined for a wireless device without using expensive handheld instruments. Meanwhile, the real-time performance of optimal channel allocation can be guaranteed, the stability and the anti-interference performance of the Lora wireless network are greatly improved, and various applications are facilitated.
An embodiment of the present invention further provides a wireless gateway, as shown in fig. 3, including:
a message forwarding module 301, configured to receive a probe message sent by all terminals in an area through a channel arbitrarily selected from all unlicensed channels and forward the probe message to a first server, so that the first server determines a first channel according to attribute information of the probe message until all unlicensed channels are selected at least once as channels for sending the probe message;
a channel information sending module 303, configured to send all unlicensed channel information in the area to the first server, so that the first server generates a channel list according to a pre-established policy and the channel information,
a channel list processing module 305, configured to receive the channel list, and send the channel list to all terminals through the first channel, so that the terminals determine whether channels in the channel list satisfy a use condition according to the channel list, and perform wireless communication with the wireless gateway according to a determination result.
Optionally, the attribute information includes at least one of RSSI, timestamp, phase, or SNR of the packet.
Optionally, the message forwarding module 301 is specifically configured to receive probe messages sent by all terminals in an area through a channel arbitrarily selected from all the unlicensed channels and forward the probe messages to the first server, so that the first server sorts the received signals according to the RSSI of all the unlicensed channels, selects n unlicensed channels with the highest RSSI, and selects, as the first channel, a channel with a SNR value that is the second among the n channels according to the SNR of the n channels, where n is a natural number greater than or equal to 3 until all the unlicensed channels are selected at least once as channels for sending the probe messages.
Optionally, the wireless gateway further includes: the channel information collection module is used for starting a scanning mode and collecting channel bottom noise information of all the unlicensed frequency bands in the region;
the channel information sending module 303 is specifically configured to send the list including the channel noise floor information and the channel frequency corresponding to the channel noise floor information to the first server, so that the first server sorts, according to a difference between each channel noise floor information in the list and a preset threshold, a working channel list is determined according to a result of the sorting.
Optionally, the channel list processing module 305 is specifically configured to broadcast the working channel list to all terminals through the first channel, so that the terminals determine whether channels in the working channel list satisfy a use condition according to the channel list, and when the channels in the channel list satisfy the use condition, randomly select one channel from the working channel list to perform wireless communication with the wireless gateway; and when the channels in the working channel list do not meet the use conditions, starting a random avoidance mechanism to carry out wireless communication with the wireless gateway.
The embodiment of the invention has the beneficial effects that: in a complex wireless environment, an appropriate wireless channel can be effectively determined for a wireless device without using expensive handheld instruments. Meanwhile, the real-time performance of optimal channel allocation can be guaranteed, the stability and the anti-interference performance of the Lora wireless network are greatly improved, and various applications are facilitated.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (6)
1. A method of wireless channel selection, comprising:
receiving detection messages which are sent to a wireless gateway by all terminals in a region through a channel arbitrarily selected from all the authorization-free channels and forwarded by the wireless gateway until all the authorization-free channels are selected at least once as channels for sending the detection messages, determining a first channel according to the attribute information of the detection messages,
acquiring all the information of the authorization-free channels in the area from the wireless gateway, generating a channel list according to a preset strategy,
the wireless gateway is instructed to send the channel list to all terminals through the first channel, so that the terminals can judge whether the channels in the channel list meet the use conditions according to the channel list and carry out wireless communication with the wireless gateway according to the judgment result;
the attribute information comprises at least one of signal strength RSSI, time stamp, phase or signal-to-noise ratio SNR of the message;
the step of determining the first channel according to the attribute information of the probe packet includes: sorting according to the signal strength RSSI of all the unlicensed channels, selecting n unlicensed channels with the highest RSSI, and selecting a channel with the SNR value being the second of the n unlicensed channels as a first channel according to the SNR of the n unlicensed channels, wherein n is a natural number more than or equal to 3;
the step of obtaining all the information of the authorization-free channel in the area from the wireless gateway and generating a channel list according to a preset strategy comprises the following steps:
when the wireless gateway starts a scanning mode, after channel bottom noise information of all unlicensed frequency bands in the region is collected, a list containing the channel bottom noise information and channel frequencies corresponding to the channel bottom noise information is obtained, a difference value between each channel bottom noise information in the list and a preset threshold value is sorted, and a channel list is determined according to the sorting result.
2. The method according to claim 1, wherein the step of instructing the wireless gateway to send the channel list to all terminals through the first channel, so that the terminals determine whether the channels in the channel list satisfy the use condition according to the channel list, and perform wireless communication with the wireless gateway according to the determination result specifically includes:
the wireless gateway is instructed to broadcast the channel list to all terminals through the first channel, so that the terminals can judge whether the channels in the channel list meet the use conditions or not according to the channel list, and when the channels in the channel list meet the use conditions, one channel is randomly selected from the channel list to carry out wireless communication with the wireless gateway; and when the channels in the channel list do not meet the use conditions, starting a random avoidance mechanism to carry out wireless communication with the wireless gateway.
3. An apparatus for wireless channel selection, comprising:
a receiving module, configured to receive a probe packet sent to a wireless gateway by all terminals in an area through a channel arbitrarily selected from all unlicensed channels and forwarded by the wireless gateway, until all unlicensed channels are selected at least once as channels for sending the probe packet,
a determining module, configured to determine a first channel according to the attribute information of the probe packet,
an obtaining module, configured to obtain all unlicensed channel information in the area from the wireless gateway,
a generating module for generating a channel list according to a predetermined policy,
the indicating module is used for indicating the wireless gateway to send the channel list to all terminals through the first channel so that the terminals can judge whether the channels in the channel list meet the use conditions according to the channel list and carry out wireless communication with the wireless gateway according to the judgment result;
the attribute information comprises at least one of RSSI, timestamp, phase or SNR of the message;
the determining module is specifically configured to: sorting according to the RSSI of all the unlicensed channels, selecting n unlicensed channels with the highest RSSI, and selecting a channel with the SNR value being the second channel in the n unlicensed channels as a first channel according to the SNRs of the n unlicensed channels, wherein n is a natural number more than or equal to 3;
the obtaining module is specifically configured to, when the wireless gateway starts a scanning mode and collects channel noise floor information of all unlicensed frequency bands in the area, obtain a list including the channel noise floor information and channel frequencies corresponding to the channel noise floor information,
the generating module is specifically configured to sort the difference between each piece of channel noise floor information in the list and a preset threshold, and determine the channel list according to the sorting result.
4. The apparatus of claim 3, wherein the indication module is specifically configured to:
the wireless gateway is instructed to broadcast the channel list to all terminals through the first channel, so that the terminals can judge whether the channels in the channel list meet the use conditions or not according to the channel list, and when the channels in the channel list meet the use conditions, one channel is randomly selected from the channel list to carry out wireless communication with the wireless gateway; and when the channels in the channel list do not meet the use conditions, starting a random avoidance mechanism to carry out wireless communication with the wireless gateway.
5. A wireless gateway, comprising:
the message forwarding module is used for receiving detection messages sent by all terminals in an area through a channel arbitrarily selected from all the authorization-free channels and forwarding the detection messages to the first server, so that the first server determines the first channel according to the attribute information of the detection messages until all the authorization-free channels are selected at least once as the channel for sending the detection messages;
a channel information sending module, configured to send all unlicensed channel information in the area to the first server, so that the first server generates a channel list according to a pre-established policy and the channel information,
the channel list processing module is used for receiving the channel list and sending the channel list to all terminals through the first channel, so that the terminals can judge whether the channels in the channel list meet the use conditions according to the channel list and carry out wireless communication with the wireless gateway according to the judgment result;
the attribute information comprises at least one of RSSI, timestamp, phase or SNR of the message;
the message forwarding module is specifically configured to receive probe messages sent by all terminals in an area through a channel arbitrarily selected from all unlicensed channels and forward the probe messages to a first server, so that the first server sorts the received signals according to the RSSI of all the unlicensed channels, selects n unlicensed channels with the highest RSSI, and selects, as a first channel, a channel with a SNR value that is a second channel among the n unlicensed channels according to the SNRs of the n unlicensed channels, where n is a natural number greater than or equal to 3 until all the unlicensed channels are selected at least once as channels for sending the probe messages;
the wireless gateway further comprises: the channel information collection module is used for starting a scanning mode and collecting channel bottom noise information of all the unlicensed frequency bands in the region;
the channel information sending module is specifically configured to send a list including the channel noise floor information and channel frequencies corresponding to the channel noise floor information to the first server, so that the first server sorts, according to a difference between each channel noise floor information in the list and a preset threshold, the channel list is determined according to a sorting result.
6. The wireless gateway of claim 5,
the channel list processing module is specifically configured to broadcast the channel list to all terminals through the first channel, so that the terminals determine whether channels in the channel list satisfy a use condition according to the channel list, and when the channels in the channel list satisfy the use condition, randomly select one channel from the channel list to perform wireless communication with the wireless gateway; and when the channels in the channel list do not meet the use conditions, starting a random avoidance mechanism to carry out wireless communication with the wireless gateway.
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| CN109466590B (en) * | 2018-11-13 | 2019-06-28 | 中南民族大学 | The system and method that train position alarm is realized by the LoRa local area network of three channel builds |
| CN111314185B (en) * | 2018-12-12 | 2022-05-13 | 深圳市云海物联科技有限公司 | Ad hoc network method, ad hoc network response method, controlled equipment and gateway |
| CN110690953B (en) * | 2019-12-06 | 2020-04-24 | 武汉慧联无限科技有限公司 | Downlink gateway selection method, device and computer storage medium |
| CN112074014B (en) * | 2020-08-28 | 2023-11-24 | 北京升哲科技有限公司 | Channel selection method, device, electronic equipment and storage medium |
| CN112492688A (en) * | 2020-11-17 | 2021-03-12 | 珠海格力电器股份有限公司 | Channel configuration method and device of gateway concentrator and air conditioner cluster |
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| CN1640161A (en) * | 2002-01-07 | 2005-07-13 | 诺泰网络有限公司 | Method for controlling communication channels and base station and implementation of same method |
| CN102387504A (en) * | 2010-09-03 | 2012-03-21 | 华为技术有限公司 | Public channel processing method, device and system |
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