CN108616904A - A kind of wireless frequency point management method and system - Google Patents
A kind of wireless frequency point management method and system Download PDFInfo
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- CN108616904A CN108616904A CN201611195639.5A CN201611195639A CN108616904A CN 108616904 A CN108616904 A CN 108616904A CN 201611195639 A CN201611195639 A CN 201611195639A CN 108616904 A CN108616904 A CN 108616904A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
- H04W74/0833—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure
Abstract
A kind of wireless frequency point management method of present invention offer and system, are applied to LoRaWAN networks, including terminal is after the power is turned on, and a frequency point is randomly choosed in each channel group and sends out hello packet；After network server receives hello packet via gateway, the frequency point that terminal selection in the channel for receiving hello packet sends out hello packet sends out networking request message；After terminal receives the networking response message that network server is sent via optimal gateway, via optimal gateway accessing network；The resources occupation rate of each gateway determines that the corresponding network environment information of terminal is obtained according to what is received by different gateways come the hello packet of self terminal by network server to the optimal gateway in coverage area where network environment information of the network server corresponding to terminal and terminal.The wireless frequency point management method and system of the present invention can be effectively improved the utilization rate of frequency point resource, reduce packet loss, the error rate of wireless network.
Description
Technical field
The present invention relates to the technical fields of wireless communication, more particularly to a kind of wireless frequency point management method and system.
Background technology
LoRa is a kind of wireless skill in low-power consumption wide area network (Low Power Wide Area Network, LPWAN)
Art has the characteristics that long range, low-power consumption, low rate, low cost, is suitble to large scale deployment.The coverage area of LoRa can be
The data integration of collection to common data platform can be established such as smart city, intelligence by one city, even a country
The projects such as intelligent traffic, wisdom factory；The big data that the later stage can also can be carried out using these data is excavated, and city pipe is conducive to
The projects such as reason, social public administration, industry internet, development consulting.
LoRaWAN is the low-power consumption wide area network specification released by LoRa alliances, and the network architecture is by terminal, gateway
(Gateway), network server (Network Server, NS) forms.Give the correct time in LoRaWAN network terminal data, terminal to
The external world sends wireless data；After gateway receives wireless signal, Ethernet or cellular carrier network (3G or 4G) can be passed through
Data are reported into network server；Network server preserves the data of reception, and identifies the data packet class reported
Type will then reply message and be pushed to gateway, sent out in the form of wireless by gateway again if it is the data packet that needs are replied
It goes.Interaction protocol is complete ICP/IP protocol between gateway and network server, is wirelessly handed between terminal and gateway
Mutually, using the LoRaWAN agreements for belonging to MAC layer.In LoRaWAN specifications, two kinds of terminal access modules are defined, respectively wirelessly
Activate (Over-The-Air Activation, OTTA) and manual actuation (Activation By Personalization,
ABP).Under OTAA patterns, the equipment random number (DevNonce) and network server that are generated at random according to terminal generate at random
Application layer random number (AppNonce) automatic generating network session key (Network Session Key, NwkSKey) and answer
With session key (Application Session Key, AppSKey)；Under ABP patterns, using fixed NwkSKey and
AppSKey.Both of which is compared, and the safety of OTAA is more preferable, and ABP is then accessed using fairly simple.
According to LoRaWAN1.01 specifications define, 470 frequency range uplink frequency point of China from 470.3MHz to 489.3MHz,
In per 200KHz be a frequency point, a frequency point corresponds to a working channel.Such as mono- channel of 470.3MHz, 470.5MHz
One channel etc. is divided into 96 channels altogether.And the range of receiving of a gateway can only in continuous 8 range of channels,
So 96 channels can be divided into 12 channel groups again.Therefore, channel group divides as shown in table 1.
The starting frequency point and termination frequency point of 1,12 channel group of table
Therefore, the receivable range of channels of each gateway is a channel group.Terminal and the mutual messaging of gateway, it is desirable that
It is operated in the same channel group.Assuming that terminal works, in first channel, frequency point ranges are 470.3 to 471.7, are sent
When data, can therefrom random one frequency point of selection, can be respectively 470.3MHz, 470.5MHz, 470.7MHz,
470.9MHz, 471.1MHz, 471.3MHz, 471.5MHz or 471.7MHz.
Due to the mode using wireless telecommunications between terminal and gateway, and LoRa is using pure ALOHA agreements, institute
There is conflict with inevitable.When this conflict is mainly shown as two or more terminals simultaneously with same frequency point transmission data,
Its signal will interfere with each other, each other noise, cause the signal-to-noise ratio (SNR) that receiving terminal obtains very low, and noise is excessive, influence normal
The reception of message, also you can't get correct message content, it is exactly packet loss to embody to the evaluation index on network server
It is excessive.In a certain range, terminal quantity is more, caused by interfere with each other bigger, packet loss is also bigger.According to actual environment
Verification is obtained a result, when interference is occurred mainly in using same frequency point；And two different frequent points are operated in, it is especially different
It is interfered close to zero between the terminal of channel group.
Invention content
In view of the foregoing deficiencies of prior art, the purpose of the present invention is to provide a kind of wireless frequency point management method and
System, terminal send hello packet in each channel group of forward direction for sending the request that networks, and network server is according to hello packet
It updates the network environment information of terminal association under different gateways and selects optimal gateway to complete terminal networking, to effectively
The utilization rate for improving frequency point resource reduces packet loss, the error rate of wireless network.
In order to achieve the above objects and other related objects, the present invention provides a kind of wireless frequency point management method, is applied to
LoRaWAN networks, the LoRaWAN networks include terminal, gateway and network server；The management method includes following step
Suddenly：After the power is turned on, one frequency point of random selection sends out hello packet to terminal in each channel group；In network server via net
After pass receives hello packet, terminal receive hello packet channel in selection send out hello packet frequency point send out into
Net request message；After terminal receives the networking response message that network server is sent via optimal gateway, via optimal net
Close access network；Optimal gateway covering where network environment information of the network server corresponding to terminal and terminal
The resources occupation rate of each gateway determines that the corresponding network environment information of terminal is by network server according to by different nets in range
It closes the hello packet for carrying out self terminal received and obtains.
In one embodiment of the invention, if the gateway of channel group where randomly selected frequency point exists in each channel group,
Then gateway can receive the hello packet and be transmitted to network server；If letter where randomly selected frequency point in each channel group
The gateway of road group is not present, then the hello packet will not be received, without any processing.
In one embodiment of the invention, the network environment information includes the hello packet received under different gateways
Received signal strength, signal-to-noise ratio；The resources occupation rate includes CPU usage, memory usage and channel capacity occupancy.
In addition, the present invention also provides a kind of wireless frequency point management method, it is applied to LoRaWAN networks, the LoRaWAN nets
Network includes terminal, gateway and network server；
The management method includes the following steps：
After the power is turned on, one frequency point of random selection sends out hello packet to terminal in each channel group；
Network server receives hello packet via different gateways, and according to the hello packet received by different gateways
Network environment information corresponding to more new terminal；
The frequency point that terminal selection in the channel for receiving hello packet sends out hello packet sends out networking request message；
Network server receives the networking request message of terminal, the network environment corresponding to terminal via different gateways
The resources occupation rate of each gateway determines optimal gateway in coverage area where information and terminal, and is sent out to terminal via optimal gateway
It is sent into net response message；
Terminal is via optimal gateway accessing network, to carry out the upload of business datum message.
In one embodiment of the invention, further include：When the resources occupation rate of current optimal gateway reaches preset critical,
New channel group increases gateway.
In one embodiment of the invention, if the gateway of channel group where randomly selected frequency point exists in each channel group,
Then gateway can receive the hello packet and be transmitted to network server；If letter where randomly selected frequency point in each channel group
The gateway of road group is not present, then the hello packet will not be received, without any processing.
In one embodiment of the invention, the network environment information includes the hello packet received under different gateways
Received signal strength, signal-to-noise ratio；The resources occupation rate includes CPU usage, memory usage and channel capacity occupancy.
Meanwhile the present invention also provides a kind of wireless frequency points to manage system, is applied to LoRaWAN networks, including terminal, gateway
And network server；
Terminal sends out hello packet for randomly choosing a frequency point in each channel group after the power is turned on；In network service
After device receives hello packet, in the channel for receiving hello packet selection send out the frequency point of hello packet and send out networking and ask
Seek message；And it after receiving the networking response message that network server is sent via optimal gateway, is connect via optimal gateway
Enter network；
Gateway between terminal and network server for transmitting message；
Network server is used to receive the hello packet that terminal is sent out via gateway, and according to hello packet more new terminal
Corresponding network environment information；And the networking request message of terminal, the network corresponding to terminal are received via gateway
The resources occupation rate of each gateway determines optimal gateway in coverage area where environmental information and terminal, and via optimal gateway to end
End sends networking response message.
In one embodiment of the invention, if the gateway of channel group where randomly selected frequency point exists in each channel group,
Then gateway can receive the hello packet and be transmitted to network server；If letter where randomly selected frequency point in each channel group
The gateway of road group is not present, then the hello packet will not be received, without any processing.
In one embodiment of the invention, the network environment information includes the hello packet received under different gateways
Received signal strength, signal-to-noise ratio；The resources occupation rate includes CPU usage, memory usage and channel capacity occupancy.
As described above, the wireless frequency point management method and system of the present invention, have the advantages that：
(1) terminal is in the forward direction each channel group transmission hello packet for sending the request that networks, network server according to
Hello packet updates the network environment information table of terminal association under different gateways and selects optimal gateway to enter to complete terminal
Net, to be effectively improved the utilization rate of frequency point resource；
(2) reduce packet loss, the error rate of wireless network；
(3) in the network environment supersaturation of gateway, new gateway can be increased in new channel group, to ensure that nothing
The quality of line communication.
Description of the drawings
Fig. 1 is shown as the flow chart of the first embodiment of the wireless frequency point management method of the present invention；
Fig. 2 is shown as the structural schematic diagram of the hello packet of the present invention；
Fig. 3 is shown as the flow chart of the second embodiment of the wireless frequency point management method of the present invention；
Fig. 4 is shown as the structural schematic diagram of the wireless frequency point management system of the present invention；
Fig. 5 is shown as the transmission process schematic diagram of the hello packet of the present invention；
Fig. 6 is shown as transmission and the response process schematic diagram of the networking request message of the present invention.
Component label instructions
1 terminal
2 gateways
3 network servers
Specific implementation mode
Illustrate that embodiments of the present invention, those skilled in the art can be by this specification below by way of specific specific example
Disclosed content understands other advantages and effect of the present invention easily.The present invention can also pass through in addition different specific realities
The mode of applying is embodied or practiced, the various details in this specification can also be based on different viewpoints with application, without departing from
Various modifications or alterations are carried out under the spirit of the present invention.
It should be noted that the diagram provided in the present embodiment only illustrates the basic conception of the present invention in a schematic way,
Then component count, shape and size when only display is with related component in the present invention rather than according to actual implementation in schema are painted
System, when actual implementation kenel, quantity and the ratio of each component can be a kind of random change, and its assembly layout kenel also may be used
It can be increasingly complex.
As shown in table 2, in LoRaWAN specifications, 8 kinds of type of messages are defined.That is, type of message be only limitted to
Lower eight kinds.
8 kinds of type of messages in table 2, LoRaWAN specifications
| MType | Description |
| 000 | Network (Join) request |
| 001 | Network (Join) response |
| 010 | Uplink non-acknowledgement |
| 011 | Downlink non-acknowledgement |
| 100 | Uplink confirms |
| 101 | Downlink confirms |
| 110 | Retain |
| 111 | Privately owned definition |
Wherein, type of message character Mtype is indicated using 3 bit.
Referring to Fig.1, wireless frequency point management method of the invention is applied to LoRaWAN networks, and the LoRaWAN networks include
Terminal, gateway and network server.
Specifically, which includes the following steps：
Step S11, after the power is turned on, one frequency point of random selection sends out hello packet to terminal in each channel group.
Specifically, hello packet is defined as network environment probe messages, that is, is used for detection network environment.In the present invention
In, realize hello packet using the privately owned definition message corresponding to type of message 111.
As shown in Fig. 2, the content-length of hello packet is 16 bytes, preceding 8 bytes are AppEUI, indicate application mark
Know；8 bytes are DevEUI afterwards, indicate terminal iidentification.
It should be noted that the terminal used in the present invention needs to support full frequency band, channel all in full frequency band is supported
Group.For example, in China, terminal needs to support 470 frequency range of China, supports 12 channel groups in 470 frequency ranges.Therefore, in terminal
After electricity, into 12 channel groups, a randomly selected frequency point sends out hello packet in each channel.
Preferably, into each channel group, a randomly selected frequency point sends out hello packet to terminal successively.
Step S12, after network server receives hello packet via gateway, terminal is in the letter for receiving hello packet
The frequency point for sending out hello packet is selected to send out networking request message in road.
Wherein, the operating mode of gateway is data penetration transmission pattern.No matter what kind of air message is received, and gateway all can
Report to network server.Likewise, receiving the downlink message that network server issues, gateway is also sent directly to terminal and goes.
It should be noted that if the gateway of channel group where randomly selected frequency point exists in each channel group, then gateway
The hello packet can be received and be transmitted to network server；If channel group where randomly selected frequency point in each channel group
Gateway is not present, then the hello packet would not be received, without any processing.
Step S13, after terminal receives the networking response message that network server is sent via optimal gateway, via most
Excellent gateway accessing network；The covering where network environment information of the network server corresponding to terminal and terminal of optimal gateway
The resources occupation rate of each gateway determines that the corresponding network environment information of terminal is by network server according to by different nets in range
It closes the hello packet for carrying out self terminal received and obtains.
Wherein, network environment information include the hello packet received under different gateways received signal strength (RSSI),
Signal-to-noise ratio (SNR).Network environment parameters are as one of the basis for estimation for allowing terminal to access which gateway.
After accessing terminal to network, starts to send business datum message to network server via optimal gateway, carry out normal
Periodic traffic data report.Wherein, terminal is after access network success, the channel that is only operated in where optimal gateway
Group.
Specifically, after network server receives the hello packet of terminal via a certain gateway, according in hello packet
Terminal iidentification and hello packet wireless parameter information, update terminal network environment information corresponding under the gateway,
But and it is not responding to the hello packet of terminal；After receiving the networking request message that terminal is sent via the gateway again, according to it
The resources occupation rate such as CPU of each gateway in the preceding network environment information preserved under different gateways and terminal place coverage area
Occupancy, memory usage, channel capacity occupancy select an optimal gateway to respond networking request message.When terminal from
After the optimal gateway of network server selection receives networking response message, it is just operated in channel group where optimal gateway, it is then logical
Cross the upload that the optimal gateway carries out business datum.
With reference to Fig. 3, wireless frequency point management method of the invention is applied to LoRaWAN networks, and the LoRaWAN networks include
Terminal, gateway and network server.
Specifically, which includes the following steps：
Step S21, after the power is turned on, one frequency point of random selection sends out hello packet to terminal in each channel group.
Specifically, hello packet is defined as network environment probe messages, that is, is used for detection network environment.In the present invention
In, realize hello packet using the privately owned definition message corresponding to type of message 111.
As shown in Fig. 2, the content-length of hello packet is 16 bytes, preceding 8 bytes are AppEUI, indicate application mark
Know；8 bytes are DevEUI afterwards, indicate terminal iidentification.
It should be noted that the terminal used in the present invention needs to support full frequency band, channel all in full frequency band is supported
Group.For example, in China, terminal needs to support 470 frequency range of China, supports 12 channel groups in 470 frequency ranges.Therefore, in terminal
After electricity, into 12 channel groups, a randomly selected frequency point sends out hello packet in each channel.
Preferably, into each channel group, a randomly selected frequency point sends out hello packet to terminal successively.
Step S22, network server receives hello packet via different gateways, and according to being received by different gateways
Network environment information corresponding to hello packet more new terminal.
Wherein, network environment information include the hello packet received under different gateways received signal strength (RSSI),
Signal-to-noise ratio (SNR).Network environment parameters are as one of the basis for estimation for allowing terminal to access which gateway.
Wherein, the operating mode of gateway is data penetration transmission pattern.No matter what kind of air message is received, and gateway all can
Report to network server.Likewise, receiving the downlink message that network server issues, gateway is also sent directly to terminal and goes.
It should be noted that if the gateway of channel group where randomly selected frequency point exists in each channel group, then gateway
The hello packet can be received and be transmitted to network server；If channel group where randomly selected frequency point in each channel group
Gateway is not present, then the hello packet would not be received, without any processing.
Specifically, after network server receives the hello packet of terminal via a certain gateway, according in hello packet
Terminal iidentification and hello packet wireless parameter information, update terminal network environment information corresponding under the gateway,
But and it is not responding to the hello packet of terminal.
Step S23, terminal selection in the channel for receiving hello packet sends out the frequency point of hello packet and sends out networking and ask
Seek message.
Step S24, after networking request message of the network server via different gateways reception terminal, corresponding to terminal
Network environment information and terminal where in coverage area the resources occupation rate of each gateway determine optimal gateway, and via optimal net
It closes to terminal and sends networking response message.
Specifically, after network server receives the networking request message that terminal is sent, according to previously stored network rings
The resources occupation rate of each gateway such as CPU usage, memory usage, channel hold in coverage area where border information and terminal
Occupancy is measured, selects an optimal gateway to respond networking request message.
Step S25, terminal is via optimal gateway accessing network, to carry out the upload of business datum message.
Specifically, after accessing terminal to network, start to send business datum message to network server via optimal gateway, into
The normal periodic traffic data of row report.Wherein, terminal is only operated in after access network success where optimal gateway
Channel group.
Preferably, further include：When the resources occupation rate of current optimal gateway reaches preset critical, increase in new channel group
Screening closes.
More and more with the terminal of access, the resources occupation rate of current optimal gateway is also lower and lower.Work as resource occupation
When rate reaches preset critical, it is necessary to increase the gateway for being operated in new channel group.After increasing gateway, if there is new end
Terminate into network, network server will the adjust automatically terminal works in new channel group, without allowing original access environment
Worse and worse, to reduce packet loss, the error rate of wireless network.
With reference to Fig. 4, wireless frequency point management system application of the invention is in LoRaWAN networks, including terminal 1, gateway 2 and net
Network server 3.
Terminal 1 sends out hello packet for randomly choosing a frequency point in each channel group after the power is turned on；In network service
After device receives hello packet, in the channel for receiving hello packet selection send out the frequency point of hello packet and send out networking and ask
Seek message；And it after receiving the networking response message that network server is sent via optimal gateway, is connect via optimal gateway
Enter network.
Specifically, hello packet is defined as network environment probe messages, that is, is used for detection network environment.In the present invention
In, realize hello packet using the privately owned definition message corresponding to type of message 111.
As shown in Fig. 2, the content-length of hello packet is 16 bytes, preceding 8 bytes are AppEUI, indicate application mark
Know；8 bytes are DevEUI afterwards, indicate terminal iidentification.
It should be noted that the terminal used in the present invention needs to support full frequency band, channel all in full frequency band is supported
Group.For example, in China, terminal needs to support 470 frequency range of China, supports 12 channel groups in 470 frequency ranges.Therefore, in terminal
After electricity, into 12 channel groups, a randomly selected frequency point sends out hello packet in each channel.
Preferably, into each channel group, a randomly selected frequency point sends out hello packet to terminal successively.
It should be noted that if the gateway of channel group where randomly selected frequency point exists in each channel group, then gateway
The hello packet can be received and be transmitted to network server；If channel group where randomly selected frequency point in each channel group
Gateway is not present, then the hello packet would not be received, without any processing.
Specifically, after accessing terminal to network, start to send business datum message to network server via optimal gateway, into
The normal periodic traffic data of row report.Wherein, terminal is only operated in after access network success where optimal gateway
Channel group.
Gateway 2 between terminal and network server for transmitting message.
Wherein, the operating mode of gateway is data penetration transmission pattern.No matter what kind of air message is received, and gateway all can
Report to network server.Likewise, receiving the downlink message that network server issues, gateway is also sent directly to terminal and goes.
Network server 3 is used to receive the hello packet that terminal is sent out via gateway, and is updated eventually according to hello packet
The corresponding network environment information in end；And the networking request message of terminal, the net corresponding to terminal are received via gateway
The resources occupation rate of each gateway determines optimal gateway in coverage area where network environmental information and terminal, and via optimal gateway to
Terminal sends networking response message.
Wherein, network environment information include the hello packet received under different gateways received signal strength (RSSI),
Signal-to-noise ratio (SNR).Network environment parameters are as one of the basis for estimation for allowing terminal to access which gateway.
Specifically, after network server receives the hello packet of terminal via a certain gateway, according in hello packet
Terminal iidentification and hello packet wireless parameter information, update terminal network environment information corresponding under the gateway,
But and it is not responding to the hello packet of terminal；After receiving the networking request message that terminal is sent via the gateway again, according to it
The resources occupation rate such as CPU of each gateway in the preceding network environment information preserved under different gateways and terminal place coverage area
Occupancy, memory usage, channel capacity occupancy select an optimal gateway to respond networking request message.When terminal from
After the optimal gateway of network server selection receives networking response message, it is just operated in channel group where optimal gateway, it is then logical
Cross the upload that the optimal gateway carries out business datum.
Preferably, network server is additionally operable to, when the resources occupation rate of current optimal gateway reaches preset critical, carry
Show and increases gateway in new channel group.
More and more with the terminal of access, the resources occupation rate of current optimal gateway is also lower and lower.Work as resource occupation
When rate reaches preset critical, it is necessary to increase the gateway for being operated in new channel group.After increasing gateway, if there is new end
Terminate into network, network server will the adjust automatically terminal works in new channel group, without allowing original access environment
Worse and worse, to reduce packet loss, the error rate of wireless network.
Wireless frequency point management method of the invention is expanded on further below by specific embodiment.The embodiment is
It is realized for 470 frequency range of China.
In a network environment, gateway A, gateway B, gateway C, gateway D and gateway E are existed simultaneously, they are operated in difference
Channel group, it is also possible to be operated in identical channel group.Assuming that gateway A is operated in the first channel group, gateway B is operated in the second letter
Road group, and so on, gateway E is operated in the 5th channel group.As shown in figure 5, terminal randomly chooses a frequency from 12 channel groups
Point, sends out hello packet successively, and hello packet is forwarded to net after having the gateway of channel group where supporting the frequency point to receive
Network server.If there is no the gateway for supporting the frequency point, which would not be received, also without any processing.
Gateway server has been respectively received five gateway A, gateway B, gateway C, gateway D and gateway E gateways and has reported
Hello packet records the network environment information to give the correct time on hello packet, including received signal strength (RSSI), signal-to-noise ratio respectively
(SNR), these parameters are stored into network environment information table.
Terminal to all channel groups send hello packet after the completion of, then successively receive hello packet channel in select
The frequency point for sending out hello packet sends networking request message.Network server is selected optimal after receiving networking request message
Gateway, only in response to the networking request message reported from optimal gateway.Network environment letter of the network server corresponding to terminal
The resources occupation rate of each gateway includes CPU usage, memory usage, channel capacity occupancy in coverage area where breath and terminal
Rate, COMPREHENSIVE CALCULATING obtain optimal gateway, to ensure that network resource utilization remains balanced.
As shown in fig. 6, according to current network conditions, it is optimal gateway to obtain gateway B.Therefore it sends out networking via gateway B and rings
After answering message, terminal to receive networking response message, terminal networks via gateway B, starts to report business datum message.
More and more with the terminal of access, the resources occupation rate of current optimal gateway is also lower and lower, works as resource occupation
When rate is close to preset critical, it is necessary to increase the gateway for being operated in new channel group, for example increase gateway F, be operated in letter
Road group 6.In this way if there is new terminal access again, will adjust automatically its be operated in channel group 6, without allowing original access ring
Border worse and worse, to reduce packet loss, the error rate of wireless network.
In conclusion the wireless frequency point management method and system terminal of the present invention are in each letter of forward direction for sending the request that networks
Road group sends hello packet, and network server updates the network environment information of terminal association under different gateways according to hello packet
Table simultaneously selects optimal gateway to complete terminal networking, to be effectively improved the utilization rate of frequency point resource；Reduce wireless
The packet loss of network, error rate；In the network environment supersaturation of gateway, new gateway can be increased in new channel group, from
And it ensure that the quality of wireless communication.So the present invention effectively overcomes various shortcoming in the prior art and has high industrial
Utility value.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
The personage for knowing this technology can all carry out modifications and changes to above-described embodiment without violating the spirit and scope of the present invention.Cause
This, institute is complete without departing from the spirit and technical ideas disclosed in the present invention by those of ordinary skill in the art such as
At all equivalent modifications or change, should by the present invention claim be covered.
Claims (10)
1. a kind of wireless frequency point management method, it is characterised in that：Applied to LoRaWAN networks, the LoRaWAN networks include eventually
End, gateway and network server；
The management method includes the following steps：
After the power is turned on, one frequency point of random selection sends out hello packet to terminal in each channel group；
After network server receives hello packet via gateway, terminal selects to send out in the channel for receiving hello packet
The frequency point of hello packet sends out networking request message；
After terminal receives the networking response message that network server is sent via optimal gateway, via optimal gateway accessing net
Network；The optimal gateway is each in coverage area where network environment information of the network server corresponding to terminal and terminal
What the resources occupation rate of gateway determined, the corresponding network environment information of terminal is received by network server according to by different gateways
The hello packet for carrying out self terminal and obtain.
2. wireless frequency point management method according to claim 1, it is characterised in that：If randomly selected in each channel group
The gateway of channel group exists where frequency point, then gateway can receive the hello packet and be transmitted to network server；If each channel
The gateway of channel group is not present where randomly selected frequency point in group, then the hello packet will not be received, and not do any place
Reason.
3. wireless frequency point management method according to claim 1, it is characterised in that：The network environment information includes difference
Received signal strength, the signal-to-noise ratio of the hello packet received under gateway；The resources occupation rate includes CPU usage, memory
Occupancy and channel capacity occupancy.
4. a kind of wireless frequency point management method, it is characterised in that：Applied to LoRaWAN networks, the LoRaWAN networks include eventually
End, gateway and network server；
The management method includes the following steps：
After the power is turned on, one frequency point of random selection sends out hello packet to terminal in each channel group；
Network server receives hello packet via different gateways, and is updated according to the hello packet received by different gateways
Network environment information corresponding to terminal；
The frequency point that terminal selection in the channel for receiving hello packet sends out hello packet sends out networking request message；
Network server receives the networking request message of terminal, the network environment information corresponding to terminal via different gateways
Optimal gateway is determined with the resources occupation rate of each gateway in coverage area where terminal, and is transmitted into terminal via optimal gateway
Net response message；
Terminal is via optimal gateway accessing network, to carry out the upload of business datum message.
5. wireless frequency point management method according to claim 4, it is characterised in that：Further include：The money of current optimal gateway
When source occupancy reaches preset critical, increase gateway in new channel group.
6. wireless frequency point management method according to claim 4, it is characterised in that：If randomly selected in each channel group
The gateway of channel group exists where frequency point, then gateway can receive the hello packet and be transmitted to network server；If each channel
The gateway of channel group is not present where randomly selected frequency point in group, then the hello packet will not be received, and not do any place
Reason.
7. wireless frequency point management method according to claim 4, it is characterised in that：The network environment information includes difference
Received signal strength, the signal-to-noise ratio of the hello packet received under gateway；The resources occupation rate includes CPU usage, memory
Occupancy and channel capacity occupancy.
8. a kind of wireless frequency point manages system, it is characterised in that：Applied to LoRaWAN networks, including terminal, gateway and network clothes
Business device；
Terminal sends out hello packet for randomly choosing a frequency point in each channel group after the power is turned on；It is connect in network server
After receiving hello packet, the frequency point for sending out hello packet is selected to send out networking request report in the channel for receiving hello packet
Text；And after receiving the networking response message that network server is sent via optimal gateway, via optimal gateway accessing net
Network；
Gateway between terminal and network server for transmitting message；
Network server is used to receive the hello packet that terminal is sent out via gateway, and right according to hello packet more new terminal institute
The network environment information answered；And the networking request message of terminal, the network environment corresponding to terminal are received via gateway
The resources occupation rate of each gateway determines optimal gateway in coverage area where information and terminal, and is sent out to terminal via optimal gateway
It is sent into net response message.
9. wireless frequency point according to claim 8 manages system, it is characterised in that：If randomly selected in each channel group
The gateway of channel group exists where frequency point, then gateway can receive the hello packet and be transmitted to network server；If each channel
The gateway of channel group is not present where randomly selected frequency point in group, then the hello packet will not be received, and not do any place
Reason.
10. wireless frequency point according to claim 8 manages system, it is characterised in that：The network environment information includes not
Received signal strength, signal-to-noise ratio with the hello packet received under gateway；The resources occupation rate includes CPU usage, interior
Deposit occupancy and channel capacity occupancy.
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