CN105979547B - A kind of communication means of wide area network, node apparatus and system - Google Patents
A kind of communication means of wide area network, node apparatus and system Download PDFInfo
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- CN105979547B CN105979547B CN201610503760.3A CN201610503760A CN105979547B CN 105979547 B CN105979547 B CN 105979547B CN 201610503760 A CN201610503760 A CN 201610503760A CN 105979547 B CN105979547 B CN 105979547B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
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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]
- H04W74/0808—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using carrier sensing, e.g. as in CSMA
- H04W74/0816—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using carrier sensing, e.g. as in CSMA carrier sensing with collision avoidance
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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
- H04W74/0841—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure with collision treatment
- H04W74/085—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure with collision treatment collision avoidance
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention discloses a kind of communication means of wide area network, node apparatus and systems, the described method includes: node listens to fixed data channel after being waken up, if the fixed data channel is idle state, then start to seize the fixed data channel, if seizing success, pass through the fixed data channel uploading nodes data；If the fixed data channel is busy condition or seizes fixed data channel failure, and when meeting preset condition, then starts to seize other channels, if seizing the success of other channels, upload the node data by other described channels.The present invention seizes other channel uploading nodes data in the case where node can not be by fixed data channel uploading nodes data, through selection, realizes the success rate for guaranteeing data transmission under the precondition of low-power consumption.
Description
Technical field
The present invention relates to wireless communication technology field, in particular to a kind of communication means of wide area network, node apparatus
And system.
Background technique
With the development of wireless communication technique and the application on Internet of Things, a kind of new technology is gradually formed, i.e.,
Wireless sensor network (Wireless Sensor Networks, abbreviation WSN) technology.In wireless sensing network system,
Limited wireless communication resources are distributed between node and base station, for constructing the underlying basis structure of network system.When node is long
Between in a dormant state, periodic wakeup obtains target data according to demand, and transfers data to base station.Using the node period
The typical protocol SMAC (suspend mode media access control) of dormancy mechanism, basic thought is: the suspend mode of node period is to reduce the free time
It monitors, by physical/virtual carrier sense channel after revival, judges whether channel is idle or whether needs to receive data.But
In this kind of communication mechanism, can not solve channel confliction collide cause data transmission failure and therefrom caused by energy damage
It loses, channel confliction collision will also result in signal and cross long delay.
Summary of the invention
In view of this, the purpose of the present invention is to provide one kind, the technical issues of to solve in the prior art.
The present invention provides a kind of communication means of wide area network, which comprises
Node listens to fixed data channel after being waken up,
If the fixed data channel is idle state, start to seize the fixed data channel, if seized into
Function then passes through the fixed data channel uploading nodes data；
If the fixed data channel is busy condition or seizes the fixed data channel failure, and default when meeting
When condition, then start to seize other channels, if seizing the success of other channels, uploads the node by other described channels
Data；
The above method, it is preferred that listen to the fixed data channel be busy condition or seize the fixed number it is believed that
After road failure, seize before other channels further include:
The node setting sleeping time enters sleep state, and records the busy number of channel of the fixed data channel
And/or the fixed data channel seizes the frequency of failure；The preset condition is when the busy number of channel and/or to seize failure
When number reaches preset threshold, node starts to seize other channels.
The above method, it is preferred that further include: if seizing other channels failure, and fail when seizing other channels
When number reaches preset threshold, then the node data is abandoned, into dormant state.
The above method, it is preferred that if seizing other channels failure, and reach when seizing other channel frequency of failures
When preset threshold, then the node data is abandoned, into the concrete mode of dormant state are as follows:
Other described channels include idle data channel and emergency channel, and node preferentially seizes idle data channel；In nothing
It idle data channel or seizes the failure of idle data channel and reaches preset threshold when seizing the idle data channel frequency of failure
When, seize emergency channel；Seizing the failure of emergency channel and the discarding when seizing the emergency channel frequency of failure and reaching preset threshold
The node data, into dormant state.
The above method, it is preferred that the sleeping time is arranged according to nodal information, and the nodal information includes that node is compiled
Yard, the sleeping time between multiple nodes is different.
The above method, it is preferred that the sleeping time is fixed the sum of wakeup time and dynamic wake-up time, the fixation
Wakeup time is wide-area IoT system setting value, and the dynamic wake-up time is directly proportional to the nodes encoding.
The above method, it is preferred that described to seize the fixed data channel, seize other channels specifically:
Preemption information is sent to target BS, the preemption information is made of nodes encoding information and identification information.
The above method, it is preferred that before listening to fixed data channel after waking up nodes further include:
Node listens to broadcast singal, and the broadcast singal includes the number of nodes of multiple data channels, and the node is seized
The minimum data channel of number of nodes is registered as fixed data channel, laggard by the fixed data channel uploading nodes data
Enter dormant state.
Second aspect of the present invention provides a kind of wide area network node apparatus, comprising:
Unit is listened to, for listening to fixed data channel after node is waken up,
Preemption unit, for seizing the fixed data channel when the fixed data channel is idle state；
Transmission unit, for seizing after fixed data channel succeeds in node through the fixed data channel uploading nodes
Data；
The preemption unit, which is also used to, to be busy condition in the fixed data channel or seizes the fixed data channel
After failure, and when the busy number of channel and/or when seizing the fixed data channel frequency of failure and reaching preset threshold, then start to seize
Other channels；
The transmission unit is also used to after node seizes the success of other channels, uploads the section by other described channels
Point data.
It is above-mentioned, it is preferred that the node apparatus further include:
Counting unit, for recording the busy number of channel of the fixed data channel and/or described seizing fixed data
It the channel frequency of failure and/or seizes the idle data channel frequency of failure and/or seizes the emergency data channel frequency of failure.
Third aspect present invention provides a kind of wide-area IoT system, including background server, base station and above-mentioned node
Device.
By above scheme it is found that a kind of communication means of wide area network provided by the invention and wide area network node dress
Set, be in busy condition in fixed data channel or node seizes the failure of fixed data channel, can not by fixed number it is believed that
In the case where road uploading nodes data, other channels are seized by selection and carry out uploading nodes data, avoid the multiple suspend mode of node
Fixed data channel is listened to after wake-up repeatedly, increase node power consumption and the extended delays of data transmission and data is caused to transmit
Failure.The success rate for guaranteeing data transmission under the precondition of low-power consumption may be implemented in technical scheme.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings；
Fig. 1 is a kind of implementation flow chart of the communication means of wide area network provided in an embodiment of the present invention；
Fig. 2 and Fig. 3 is a kind of another flow chart of the communication means of wide area network provided in an embodiment of the present invention；
Fig. 4 is the relational graph of sleeping time and nodes encoding；
Fig. 5 is a kind of structural block diagram of wide area network node apparatus provided by the present application；
Fig. 6 is a kind of structural block diagram of wide-area IoT system provided by the present application.
Specific embodiment
The present invention is the low-power consumption transparent communication mode of the LoRa technology based on spread spectrum communication, has overlength distance, low function
The features such as consumption and stable communication performance ability, wireless sensor simple networking and can realize low-power consumption by the transmission mode
Data transmission.The present invention, which is directed to, needs the application scenarios of long-time sleeping to be designed, for example the data intelligence of ammeter water meter passes
It is defeated, more low-power consumption, more inexpensive requirement may be implemented.
As shown in Figure 1, may include having the present invention provides a kind of implementation flow chart of the communication means of wide area network
Following steps:
S101, node listen to fixed data channel after being waken up.
Specifically, node automatically wakes up after a data collection cycle, prepare to upload the node data of itself acquisition
To base station, whether it is in idle condition firstly the need of the fixed data channel for listening to original licensed.
If S102, the fixed data channel are idle state, start to seize the fixed data channel, if robbed
Success is accounted for, then passes through the fixed data channel uploading nodes data.
Specifically, intervening agreement (Carrier Sense based on carrier sense multiple in the present embodiment
MultipleAccess, abbreviation CSMA) can detecte whether have data transmission in channel, if there is data are transmitted, then channel is
Busy, if transmitted without data, channel status is idle at this time.Specifically, having in the LoRa communication technology leading
Code detection function can then be judged whether busy, if having signal transmission by whether having preamble transmissions on detection channel.Such as
Fruit channel is in idle condition, then passes through the preemption information of fixed data channel transmission carrying self information to base station.Node to
Base station sends RTS signal, and the RTS signal only includes nodal information and identification information, and will simplify nodal information, so that data
Packet is long be reduced to it is most short, thus reduce the probability of collision and reduce collision and caused by energy loss, realizing reduces node power consumption.
Nodal information includes nodes encoding information, and identification information is a preemption information rather than data letter for identifying this information
Breath parses convenient for base station.If base station receives complete preemption information can returning response message ACK, node receives corresponding sound
Answer after message ACK that then fixed data channel seizes success.Node seizes the node for uploading needs after the success of fixed data channel
Data are transmitted to base station.
If S103, the fixed data channel are busy condition or seize the fixed data channel failure, and when full
When sufficient preset condition, then start to seize other channels, if seizing the success of other channels, uploads institute by other described channels
State node data；
It is that busy condition or node do not receive the response message of base station then fixed number when listening to the fixed data channel
It is believed that failure is seized in road, when not set any condition, node, which directly selects, seizes other channels, sends and carries to other channels
The preemption information of self information to base station, if base station receives complete preemption information can returning response message, node receives
Respective response message then seizes the success of other channels.The node data for then being uploaded needs by the emergency channel after seizing successfully
It is transmitted to base station.
When preset condition is when the busy number of channel and/or when seizing the frequency of failure and reaching preset threshold, node is to channel
It busy number and/or seizes the frequency of failure and is recorded, recording mode can be accumulative formula, i.e., the busy number of channel and seize fixation
The data channel frequency of failure adds up when reaching preset threshold value, then node seizes other channels；Recording mode can also be
Formula respectively the busy number of channel or is seized the fixed data channel frequency of failure and is recorded respectively, the one of number of the two reaches
When preset threshold, node just seizes other channels.Other channels include other data channels and/or emergency letter in the present embodiment
Road.
If S104, seizing other channels failure, enter dormant state.
If node does not receive the response message of base station return, the failure of other channels is seized, node can be lost at this time
The node data for abandoning this time acquisition waits next collection period to wake up into dormant state.The node that this can also be acquired
Data are stored, and subsequently into dormant state, are sent to base together with the node data acquired after the wake-up of next collection period
It stands.
As can be seen from the above embodiments, the communication means of a kind of wide area network provided by the invention, in fixed data channel
The failure of fixed data channel is seized in busy condition or node, fixed data channel uploading nodes data can not be passed through
In the case of, selection seizes other channels and carries out uploading nodes data, listens to fixed number repeatedly after avoiding the multiple dormancy awakening of node
It is believed that road, increases node power consumption and leads to the extended delays of data transmission and the failure of data transmission.Technical scheme
The success rate for guaranteeing data transmission under the precondition of low-power consumption may be implemented.
Embodiment two
Please refer to a kind of Fig. 2 and Fig. 3 another process of the communication means of wide area network provided in an embodiment of the present invention
Figure, may comprise steps of:
S301, node listen to broadcast singal, and the broadcast singal includes the number of nodes of multiple data channels, the node
It seizes the minimum data channel of number of nodes and is registered as fixed data channel；
Node also be not most suitable for uploading the base station login registration related information of data, not have when first powering on
Fixed data transmission node data.At this point, node first listens to broadcast singal, it include all data letters in base station in broadcast singal
The number of nodes registered in road, node select the smallest data channel of quantity to be registered according to number of nodes information,
Registration information is sent to the base station, base station registered nodes information simultaneously returns to relevant information to node, and node is after base station login
Select fixed data channel uploading nodes data.Enter dormant state after this time uploading successfully, waits next data collection cycle
It wakes up.
S302, node listen to fixed data channel after being waken up；
If S303, the fixed data channel are idle state, start to seize the fixed data channel, if robbed
Success is accounted for, then passes through the fixed data channel uploading nodes data；
Step S302-S303 specific implementation can be with related content in S101~S102 in reference implementation example one, herein not
It is described in detail again.
If S304, the fixed data channel is busy conditions or seize the fixed data channel failure, the section
Point setting sleeping time enters sleep state；And record respectively the fixed data channel the busy number of channel and the fixation
Data channel seizes the frequency of failure；
If fixed data channel is busy, it was demonstrated that the fixed data channel is used by other nodes.If node is sent out
Channels seize message but do not receive base station return seize successfully ACK, illustrate the message and other message collisions, show at this time
More than one node is wishing to seize the fixed data channel channel.At this time if waken up again using set time sleep, will have
The case where very there is last time while seizing channel in maximum probability.Therefore the time that node wakes up again will generate according to the coding of node
Fixed value is become a different time by the time that one whole network is uniquely delayed, this time can be according to tool
Body node quantity and delay requirement change, and collide again so as to avoid identical competition node.For example, a base station network
In nodes encoding be that base station distribute after base station is added by node, the Serial Number Range of node is 0 to 65535.When sleep
Between consist of two parts: the dynamic wake-up time that fixed wakeup time and coding determine.Fixed wakeup time is setting, dynamic
Wakeup time is different and linear according to nodes encoding.The relational graph of sleeping time and nodes encoding is as shown in Figure 4.Pass through
The collision that node seizes channel is reduced to the dynamic setting of sleeping time, channel collision bring energy loss can be reduced.
In the present embodiment, above-mentioned sleep is node in failed uploading nodes data and postpones low-power consumption shape when uploading
State, above-mentioned suspend mode are setting of the node according to node data collection period, the low power consumpting state in non-data acquisition time.
According to practical application scene, dormancy time is far longer than sleeping time.
If S305, the fixed data channel are busy condition or seize the fixed data channel failure, and when letter
The busy number in road and/or when seizing the fixed data channel frequency of failure and reaching preset threshold, then begin listening for broadcast singal, described
Broadcast singal includes other state information of data channel, and if there is idle data channel, then the node seizes the free time
Data channel uploads the node data by the idle data channel if seizing success；
Node will record the channel busy number of fixed data channel while calculating sleeping time entering sleep state
And/or the fixed data channel frequency of failure is seized, and if any one number of the two reaches default value, such as three times, then node
Broadcast singal is begun listening for, whether broadcast singal contains each data channel idle, if it find that have other idle data channels,
Idle data channel is then temporarily seized, if seizing success, the node data is uploaded by the idle data channel.Its
Step is seized with above-mentioned S102.
If S306, failed without idle data channel or multiple idle data channel of seizing, emergency channel is seized, more
It is secondary to seize after emergency channel failure, the node data is abandoned, into dormant state.
Node does not find that idle data channel, or discovery idle data channel transmission rob duty by listening to broadcast singal
Not busy data channel failure, and the frequency of failure reaches certain numerical value, such as three times, then node seizes emergency channel, if seized into
Function then passes through emergency channel uploading nodes data.If seizing emergency channel failure, setting the Active sleep time enters sleep
State.If accumulative repeatedly seize emergency channel failure, for example three times, then node selection abandons the number of nodes for this time needing to upload
According into dormant state, the next collection period of waiting is waken up.
Node can exit the channel of uploading nodes data, and reset channel busy after each success uploading nodes data
Commonplace number seizes the fixed data channel frequency of failure, seizes the idle data channel frequency of failure and seizes emergency channel failure time
Number.Subsequently into dormant state, next collection period is waited to wake up.
As can be seen from the above embodiments, the communication means of a kind of wide area network provided by the invention is slept by the way that dynamic is arranged
Sleep and the time and shorten and seize the data packet length of message, reduce the probability of collision and reduce collision and caused by energy loss.
In addition, other idle data channels are selected, if do not had when node repeatedly can not be by fixed data channel uploading nodes data
There are other idle data channels then to select emergency channel uploading nodes data.It is caused to reduce node due to uploading data collision
Delay, improve node upload data success rate.
Embodiment three
Referring to Fig. 5, a kind of wide area network node apparatus provided in this embodiment, including unit 01 is listened to, it is used for
Fixed data channel is listened to after waking up nodes；Preemption unit 02, for seizing this when the fixed data channel is idle state
Fixed data channel；Transmission unit 03, for uploading section by the fixed data channel after node seizes fixed data success
Point data；Counting unit 04, for recording the busy number of channel and/or seizing the fixed data channel frequency of failure and/or seize
The idle data channel frequency of failure and/or seize the emergency data channel frequency of failure.The preemption unit 01 is also used to fix at this
After data channel is busy condition or seizes the failure of fixed data channel, other channels are seized；The transmission unit 03 is also used to
After seizing the success of other channels, pass through other channel uploading nodes data.
Each unit of the present embodiment interior joint device realizes that the mode of its respective function can be real with reference to hereinbefore method
A related content is applied, and will not be described here in detail.
Embodiment 4
Referring to Fig. 6, a kind of wide-area IoT system provided in this embodiment, including background server 601, base station 602
And node apparatus 603.The node apparatus 603 is for acquisition node data and is uploaded to base station 602, before upload mode refers to
Literary embodiment related content, and will not be described here in detail.Base station 602 is sent after the node data for receiving the transmission of node apparatus 603
To background server 601, background server 601 is further processed node data.
If function described in the present embodiment method is realized in the form of SFU software functional unit and as independent product pin
It sells or in use, can store in a storage medium readable by a compute device.Based on this understanding, the embodiment of the present invention
The part of the part that contributes to existing technology or the technical solution can be embodied in the form of software products, this is soft
Part product is stored in a storage medium, including some instructions are used so that calculating equipment (it can be personal computer,
Server, mobile computing device or the network equipment or processor etc.) execute the whole of each embodiment the method for the present invention
Or part steps.And storage medium above-mentioned includes: USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only
Memory), random access memory (RAM, Random Access Memory), magnetic or disk etc. are various can store journey
The medium of sequence code.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with it is other
The difference of embodiment, same or similar part may refer to each other between each embodiment.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, this explanation
Embodiment is only a part of the embodiment of the present invention in book, instead of all the embodiments, based on the embodiments of the present invention, this
Field those of ordinary skill every other embodiment obtained without making creative work, belongs to the present invention
The present invention will not be limited to the embodiments shown herein for the range of protection, and is to fit to and original disclosed herein
Manage the widest scope consistent with features of novelty.
Claims (10)
1. a kind of communication means of wide area network, which is characterized in that the described method includes:
Node listens to fixed data channel after being waken up；
If the fixed data channel is idle state, start to seize the fixed data channel, if seizing success,
Pass through the fixed data channel uploading nodes data；
If the fixed data channel is busy condition or seizes the fixed data channel failure, and meets preset condition
When, then start to seize other channels, if seizing the success of other channels, uploads the number of nodes by other described channels
According to；
It is wherein, described to listen to the fixed data channel for busy condition or after seizing the fixed data channel failure,
It seizes before other channels further include:
Node setting sleeping time enters sleep state, and record the fixed data channel the busy number of channel and/
Or the fixed data channel seizes the frequency of failure；
The preset condition is when the busy number of channel and/or when seizing the frequency of failure and reaching preset threshold, and node starts to seize
Other channels.
2. communication means according to claim 1, which is characterized in that further include:
If seizing other channels failure, and when seizing other channel frequency of failures and reaching preset threshold, then abandon institute
Node data is stated, into dormant state.
3. communication means according to claim 2, which is characterized in that if seizing other channels failure, and work as and rob
When accounting for other channel frequency of failures and reaching preset threshold, then the node data is abandoned, into the concrete mode of dormant state are as follows:
Other described channels include idle data channel and emergency channel, and node preferentially seizes idle data channel；
In no idle data channel or seizes the failure of idle data channel and reach when seizing the idle data channel frequency of failure
When preset threshold, emergency channel is seized；
It is seizing the failure of emergency channel and is abandoning the node data when seizing the emergency channel frequency of failure and reaching preset threshold,
Into dormant state.
4. communication means according to any one of claims 1 to 3, which is characterized in that the sleeping time believes according to node
Breath setting, the nodal information includes nodes encoding, and the sleeping time between multiple nodes is different.
5. communication means according to claim 4, which is characterized in that the sleeping time is fixed wakeup time and dynamic
The sum of wakeup time, the fixed wakeup time are wide-area IoT system setting value, the dynamic wake-up time and the section
Point coding is directly proportional.
6. communication means according to claim 5, which is characterized in that described to seize the fixed data channel, seize it
His channel specifically:
Preemption information is sent to target BS, the preemption information is made of nodes encoding information and identification information.
7. communication means according to claim 1, which is characterized in that listened to after node is waken up fixed data channel it
Before further include:
Node listens to broadcast singal, and the broadcast singal includes the number of nodes of multiple data channels, and the node seizes node
The minimum data channel of quantity is registered as fixed data channel, is stopped by entering after the fixed data channel uploading nodes data
Dormancy state.
8. a kind of wide area network node apparatus characterized by comprising
Unit is listened to, for listening to fixed data channel after node is waken up,
Preemption unit, for seizing the fixed data channel when the fixed data channel is idle state；
Transmission unit, for seizing after fixed data channel succeeds in node through the fixed data channel uploading nodes number
According to；
The preemption unit, which is also used to, to be busy condition in the fixed data channel or seizes fixed data channel failure,
And when the busy number of channel and/or when seizing the fixed data channel frequency of failure and reaching preset threshold, then start to seize other letters
Road；
The transmission unit is also used to after node seizes the success of other channels, uploads the number of nodes by other described channels
According to.
9. node apparatus according to claim 8, which is characterized in that
Counting unit, for recording the busy number of channel and/or seizing the fixed data channel frequency of failure and/or seize idle number
It is believed that the road frequency of failure and/or seizing the emergency data channel frequency of failure.
10. a kind of wide-area IoT system, which is characterized in that including described in background server, base station and claim 8 or 9
Node apparatus.
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| CN106455134A (en) * | 2016-10-17 | 2017-02-22 | 国动物联网技术（上海）有限公司 | LoRaWAN ad-hoc network equipment |
| CN106685855A (en) * | 2017-01-17 | 2017-05-17 | 新智数字科技有限公司 | Data transmission method and data transmission device |
| CN108696921A (en) * | 2017-02-21 | 2018-10-23 | 中国科学院沈阳自动化研究所 | The cognitive sensor network media access control method intercepted based on broadcast preamble |
| CN107528677A (en) * | 2017-10-11 | 2017-12-29 | 杭州若联科技有限公司 | Information sends failure way to play for time and device |
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