CN110191173A - A kind of the low latency node Internet of Things and its communication means of intelligent building application - Google Patents
A kind of the low latency node Internet of Things and its communication means of intelligent building application Download PDFInfo
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- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
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- H—ELECTRICITY
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- H—ELECTRICITY
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- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/10—Flow control between communication endpoints
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- H04W4/38—Services specially adapted for particular environments, situations or purposes for collecting sensor information
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Abstract
The embodiment of the present application provides a kind of low latency node Internet of Things of intelligent building application, comprising: management server, things-internet gateway, and, the multiple sensor nodes being connect with things-internet gateway direct communication；For the current sensor node in the multiple sensor node, the current sensor node is used to collected data being sent to the management server by the things-internet gateway connecting with the current sensor node direct communication, or receive the data that first sensor node is sent, the data received are sent to the management server by the things-internet gateway connecting with the current sensor node direct communication, or collected data and/or the data received are sent to second sensor node, the collected data and/or the data received are sent to the management server by the things-internet gateway connecting with the second sensor node direct communication by the second sensor node.
Description
Technical field
This application involves the low latency node Internet of Things that INTELLIGENT BUILDING TECHNIQUE field more particularly to a kind of intelligent building are applied
And its communication means.
Background technique
Intelligent building is using Internet of Things as information transmitting medium, and with all types of sensors and various types of automations
Function system as hardware foundation, the heating of building, air-conditioning, illumination, in terms of realize it is intelligentized long-range
Status monitoring and automatic control meet the personalization of people, the demand of comfortableization, and meet the main trend of green energy conservation, together
When reduce the cumbersome human-computer interaction and During manual operation towards building facility, reduce the cost of building maintenance.
In the prior art, intelligent building realizes that the data of sensor node report by things-internet gateway, things-internet gateway
Can support simultaneously with multiple sensor nodes expansion multidiameter delay communication, but it is that a things-internet gateway can be supported and
Walking along the street number is very limited for the quantity compared to sensor node in intelligent building.Therefore, things-internet gateway is generally all
In full load state, and most of sensor node will the wait state Jing Guo certain time length could be established with things-internet gateway
It connects and executes data transmission；Sensor node can issue access request to things-internet gateway, then wait in turn waiting Internet of Things net
The response of pass；After receiving response, node and things-internet gateway set up communication connection, and after completing communication, node release should
Road communication connection is established for other sensors node to be communicated to connect, and Internet of Things communication is resulted in have bigger delay in this way.
Summary of the invention
In view of this, the purpose of the application is to propose the low latency node Internet of Things of a kind of intelligent building application and its logical
Letter method, to reduce the delay of Internet of Things Network Communication, the data that sensor node is acquired report to intelligent building in time
Management server.
A kind of low latency node of intelligent building application is proposed in the first aspect of the application based on above-mentioned purpose
Internet of Things, comprising:
Management server, the multiple things-internet gateways being connect with the management server communication, and, with each Internet of Things
Multiple sensor nodes of gateway direct communication connection；
For the current sensor node in the multiple sensor node, the current sensor node will be for that will acquire
To data the management server is sent to by the things-internet gateway connecting with the current sensor node direct communication,
Or the data that first sensor node is sent are received, the data received are passed through directly logical with the current sensor node
The things-internet gateway of letter connection is sent to the management server, or collected data and/or the data received are sent out
It send to second sensor node, is led to the collected data and/or the data received by the second sensor node
It crosses the things-internet gateway connecting with the second sensor node direct communication and is sent to the management server, to enable the pipe
Reason server regulates and controls intelligent building according to receiving data.
In some embodiments, the things-internet gateway, comprising:
Access request receiving module is sent for receiving the sensor node connecting with the things-internet gateway direct communication
Access request, and corresponding sensor node is responded；
Cache module, for what is sent to the sensor node being connect with the things-internet gateway direct communication received
Data are cached；
Data forwarding module, data forwarding for will be cached in the cache module to the management server.
In some embodiments, the cache module, specifically for directly logical with the things-internet gateway according to receiving
The sequencing for the data that the sensor node of letter connection is sent caches the data received.
In some embodiments, the things-internet gateway, further includes:
Wireless signal transmitting module, for emitting wireless signal into the preset range, to enable and the Internet of Things net
The sensor node for closing direct communication connection is established by the wireless signal and the communication connection of the things-internet gateway.
In some embodiments, the current sensor node, comprising:
Data acquisition module, for acquiring the data of corresponding types；
Data transmission blocks, for the things-internet gateway or institute being connect with the current sensor node direct communication
It states second sensor node and sends data；
Data reception module, the data sent for receiving the first sensor node.
In some embodiments, the current sensor node, further includes:
Power module, for being supplied to the data acquisition module, the data transmission blocks and the data reception module
Electricity.
In some embodiments, the sensor node includes temperature sensor node, humidity sensor node, illuminance
Sensor node, air quality sensor node and noise transducer node.
Based on above-mentioned purpose, in the second aspect of the application, it is also proposed that a kind of low latency section of intelligent building application
The communication means of point Internet of Things, comprising:
Determine the probability threshold value for allowing delay time T and communication connection is established with things-internet gateway of current sensor node
P0；
Determine that the current sensor node and preceding n jump the probability P that things-internet gateway establishes communication connectioni(T), wherein i
=2,3 ... n；
The probability P that things-internet gateway establishes communication connection is jumped to the current sensor node and preceding ni(T) it adds up,
Obtain the current probability P (T) that communication connection is established with things-internet gateway；
Judge whether the value of the current probability P (T) is greater than the probability threshold value P0, when the value of the current probability P (T)
Greater than the probability threshold value P0When, the Internet of Things in the current sensor node and n jump range is controlled according to the value of hop count n
Gateway establishes communication connection.
In some embodiments, further includes:
When the value of the current probability P (T) is less than or equal to the probability threshold value P0When, determine the current sensor section
Point jumps the probability P that things-internet gateway establishes communication connection with (n+1)thn+1(T)；
By the current probability P (T) and probability Pn+1(T) be added, generate new current probability P (T) ', judge it is described newly
Whether the value of current probability P (T) ' is greater than the probability threshold value P0。
In some embodiments, further includes:
Determine that the current sensor node and preceding 1 jumps the probability P that things-internet gateway establishes communication connection1(T), judgement is general
Rate P1(T) whether value is greater than the probability threshold value P0。
The embodiment of the present application proposes the low latency node Internet of Things and its communication means of a kind of intelligent building application, wherein
Multiple things-internet gateways that low latency node Internet of Things includes: management server, is connect with the management server communication, with
And the multiple sensor nodes being connect with each things-internet gateway direct communication；For working as in the multiple sensor node
Front sensor node, the current sensor node are direct with the current sensor node for passing through collected data
The things-internet gateway of communication connection is sent to the management server, or receives the data that first sensor node is sent, will
The data received are sent to the management by the things-internet gateway connecting with the current sensor node direct communication and take
Business device, or collected data and/or the data received are sent to second sensor node, by the second sensor
Node is by the collected data and/or the data received by connecting with the second sensor node direct communication
Things-internet gateway is sent to the management server, with enable the management server according to receive data to intelligent building carry out
Regulation.The low latency node Internet of Things and its communication means of the intelligent building application of the embodiment of the present application, can be effectively reduced object
The delay of connected network communication, the data that sensor node is acquired report to the management server of intelligent building in time.
Detailed description of the invention
By reading a detailed description of non-restrictive embodiments in the light of the attached drawings below, the application's is other
Feature, objects and advantages will become more apparent upon:
Fig. 1 is the illustrative view of functional configuration of the low latency node Internet of Things of the intelligent building application of the embodiment of the present application；
Fig. 2 is the composition knot of the things-internet gateway of the low latency node Internet of Things of the intelligent building application of the embodiment of the present application
Structure schematic diagram；
Fig. 3 is the composition knot of the sensor node of the low latency node Internet of Things of the intelligent building application of the embodiment of the present application
Structure schematic diagram；
Fig. 4 is the flow chart of the communication means of the low latency node Internet of Things of the intelligent building application of the embodiment of the present application.
Specific embodiment
The application is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining related invention, rather than the restriction to the invention.It also should be noted that in order to
Convenient for description, part relevant to related invention is illustrated only in attached drawing.
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The application is described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
As shown in Figure 1, being that the functional structure of low latency node Internet of Things of the intelligent building application of the embodiment of the present application is shown
It is intended to.From figure 1 it appears that the low latency node Internet of Things that the intelligent building of the embodiment of the present application is applied, comprising:
Management server 101, the multiple things-internet gateways 102 communicated to connect with the management server 101 are (such as institute in figure
Things-internet gateway 1, things-internet gateway 2, things-internet gateway n for showing etc.), and, connect with each 102 direct communication of things-internet gateway
The multiple sensor nodes 103 (sensor node 21, sensor node 21, sensor node 2n etc. as illustrated in the drawing) connect.
Since function of multiple sensor nodes 103 in data transmission procedure is identical, their difference is only that the class of acquisition data
Type is different, therefore by taking one (i.e. current sensor node) in multiple sensor nodes 103 as an example, to technical scheme
In the function of sensor node be described.
Specifically, for the current sensor node in the multiple sensor node 103, which be can be
The sensor node 103 connecting with any 102 direct communication of things-internet gateway, the current sensor node is for acquiring and certainly
The corresponding data of body type, and collected data are passed through into the Internet of Things that connect with the current sensor node direct communication
Gateway 102 is sent to the management server 101.In the present embodiment, the current sensor node includes temperature sensor
Node, humidity sensor node, illuminance sensor node, air quality sensor node and noise transducer node, i.e. institute
Stating current sensor node can be temperature sensor node, humidity sensor node, illuminance sensor node, air quality
Any type in sensor node and noise transducer node, for example, the current sensor node is temperature sensor section
Point, then its collected data is temperature data.
Under normal conditions, sensor node 103 is evenly distributed in intelligent building, and things-internet gateway 102 is also uniform
In distributed intelligence building, each things-internet gateway 102 has certain radio communication coverage area, and covers a certain number of
Sensor node 103 can be connect with 103 direct communication of sensor node within the scope of this.Multiple things-internet gateways 102 are common
Cover the plane domain of intelligent building.
Things-internet gateway 102 can support the communication that multidiameter delay is unfolded with 103 points of multiple sensor sections simultaneously, but one
The parallel number that a things-internet gateway 102 can be supported is compared to right and wrong for the quantity of sensor node 103 in intelligent building
Often limited, therefore, gateway of internet of things 102 is generally all in full load state, and most of sensor node 103 will be by certain
The wait state of duration could establish connection with things-internet gateway 102 and carry out data transmission.Sensor node 103 can be to Internet of Things
Net gateway 102 issues access request, then waits for the response for waiting things-internet gateway 102 in turn, only things-internet gateway 102 is parallel
When number is not full load state, the access of sensor node 103 (i.e. transmission data) could be allowed.Therefore, work as other sensors
When node is unable to the things-internet gateway 102 of access covering itself, it can be sent to current sensor node and need to be reported to management
The data of server 101, in order to distinguish other sensors node and current sensor node, with one in other sensors node
It is a, i.e., for first sensor node hereinafter, the technical solution of the application is illustrated.At this point, current sensor section
Point can be used for receiving first sensor node transmission data, by the data received by with the current sensor node
The things-internet gateway of direct communication connection is sent to the management server.In the process, first sensor node can be first
To current sensor node send a data transfer request, current sensor node after receiving the data transfer request,
Access request first can be sent to the things-internet gateway that connect with itself direct communication, then obtain connecting with itself direct communication
After the response of things-internet gateway, request is sent by information to first sensor node, and establish and first sensor node
Interface channel receives the data for needing to be reported to management server 101 that first sensor node is sent, and the number that will be received
According to being sent to the things-internet gateway connecting with itself direct communication.
Certainly, there is also full load states for the things-internet gateway connecting with current sensor node direct communication, therefore, when
Current sensor node is needed to 101 reported data of management server, and connect with current sensor node direct communication
When things-internet gateway is in full load state, at this point, current sensor node is also used to or by collected data and/or connects
The data received are sent to second sensor node, by the collected data and/or are connect by the second sensor node
The data received are sent to the management service by the things-internet gateway connecting with the second sensor node direct communication
Device, second sensor node here are any sensor node for being different from first sensor node.Similarly, current sensor
Node first can send a data transfer request to second sensor node, and second sensor node is receiving data biography
After defeated request, access request first can be sent to the things-internet gateway connecting with itself direct communication, then obtained with itself directly
After the response of the things-internet gateway of communication connection, request is sent by information to current sensor node, and establish and work as forward pass
The interface channel of sensor node receives the data for needing to be reported to management server 101 that current sensor node is sent, and will
The data received are sent to the things-internet gateway connecting with itself direct communication.
The management server 101 is in the data for receiving current sensor node and/or second sensor node and reporting
Afterwards, intelligent building can be regulated and controled according to data are received.For example, the collected temperature data of temperature sensor and default
Standard value or level threshold value compared to higher, then can control the Temperature-controlled appliance of corresponding position, so that at the position
Temperature reduce.
The low latency node Internet of Things of the intelligent building application of the embodiment of the present application, can be effectively reduced Internet of Things Network Communication
Delay, the data that sensor node is acquired report to the management server of intelligent building in time.
As shown in Fig. 2, being the things-internet gateway of the low latency node Internet of Things of the intelligent building application of the embodiment of the present application
Composed structure schematic diagram.From figure 2 it can be seen that the things-internet gateway 102 in the embodiment of the present application, may include:
Access request receiving module 1021, for receiving the sensor connecting with 102 direct communication of things-internet gateway
The access request that node 103 is sent, and corresponding sensor node is responded.
Specifically, things-internet gateway 102 can support that the logical of multidiameter delay is unfolded with 103 points of multiple sensor sections simultaneously
Letter, but the parallel number that can support of a things-internet gateway 102 is compared to the quantity of sensor node 103 in intelligent building
For be it is very limited, therefore, gateway of internet of things 102 is generally all in full load state, and most of sensor node 103 is wanted
Wait state by certain time length could establish connection with things-internet gateway 102 and carry out data transmission.Sensor node 103
Access request can be issued to things-internet gateway 102, then wait for the response for waiting things-internet gateway 102, only things-internet gateway in turn
When 102 parallel number is not full load state, the access of sensor node 103 (i.e. transmission data) could be allowed.
Cache module 1022, for sending out the sensor node being connect with the things-internet gateway direct communication received
The data sent are cached.
Specifically, after the data that the things-internet gateway receives the transmission of sensor node 103, according to receiving data
Sequencing the data received are cached.
Data forwarding module 1023, data forwarding for will be cached in the cache module to the management server.
In the present embodiment, the things-internet gateway 102 generally includes multiple access request receiving modules 1021 and one
Data forwarding module 1023, i.e., the described things-internet gateway 102 can receive the data that multiple sensor nodes 103 are sent simultaneously,
But can only be communicated to connect by a data forwarding module 1023 and the management server 101, therefore, the cache module
1022 will be after the data that the things-internet gateway receives the transmission of sensor node 103, according to receiving the successive suitable of data
Ordered pair is cached in the data received, and is sent out the data of caching according to caching sequence by the data forwarding module 1023
It send to the management server 101.
In addition, the things-internet gateway 102 of the embodiment of the present application further includes wireless signal transmitting module 1024, it is used for described
Emit wireless signal in preset range, to enable the sensor node 103 connecting with 102 direct communication of things-internet gateway pass through
The wireless signal establishes the communication connection with the things-internet gateway 102.
As shown in figure 3, being the sensor node of the low latency node Internet of Things of the intelligent building application of the embodiment of the present application
Composed structure schematic diagram.By taking the current sensor node in above-described embodiment as an example, the current sensor of the embodiment of the present application
Node 103 may include:
Data acquisition module 1031, for acquiring the data of corresponding types.
Specifically, the type and the type phase of sensor node 103 of the collected data of the data acquisition module 1031
Together, for example, sensor node 103 is temperature sensor node, then its collected data is temperature data.
Data transmission blocks 1032, for the things-internet gateway being connect with the current sensor node direct communication
102 or the second sensor node send data.
It specifically, can be first to directly logical with itself when current sensor node is needed to management server reported data
The things-internet gateway of letter connection sends access request, then after obtaining the response for the things-internet gateway connecting with itself direct communication,
Collected data and/or the data received are sent to the things-internet gateway connecting with itself direct communication.
Certainly, there is also full load states for the things-internet gateway connecting with current sensor node direct communication, therefore, when
Current sensor node is needed to management server reported data, and the Internet of Things connecting with current sensor node direct communication
When net gateway is in full load state, at this point, current sensor node is also used to or by collected data and/or receives
Data be sent to second sensor node, by the collected data and/or received by the second sensor node
Data the management server is sent to by the things-internet gateway connecting with the second sensor node direct communication.
Data reception module 1033, the data sent for receiving the first sensor node.
Power module 1034 is used for the data acquisition module, the data transmission blocks and the data reception
Block power supply.
The low latency node Internet of Things of the intelligent building application of the embodiment of the present application, can obtain similar with above-described embodiment
As technical effect, which is not described herein again.
As shown in figure 4, being the communication means of the low latency node Internet of Things of the intelligent building application of the embodiment of the present application
Flow chart.The communication means of the low latency node Internet of Things of the intelligent building application of the present embodiment, may include step:
S401: determining the permission delay time T of current sensor node and establishes the general of communication connection with things-internet gateway
Rate threshold value P0。
S402: determine that the current sensor node and preceding n jump the probability P that things-internet gateway establishes communication connectioni(T),
Wherein i=2,3 ... n.
S403: the probability P that things-internet gateway establishes communication connection is jumped to the current sensor node and preceding ni(T) it carries out
It is cumulative, obtain the current probability P (T) that communication connection is established with things-internet gateway.
S404: judge whether the value of the current probability P (T) is greater than the probability threshold value P0, as the current probability P
(T) value is greater than the probability threshold value P0When, the current sensor node is controlled according to the value of hop count n and n is jumped in range
Things-internet gateway establish communication connection.
The communication means of the low latency node Internet of Things of the intelligent building application of the embodiment of the present application is based on above-mentioned implementation
The low latency node Internet of Things of the intelligent building application of example.Since sensor node can be directly connected to things-internet gateway, i.e., one
Jump is connected to things-internet gateway.One sensor node also may be coupled to other sensor nodes (i.e. with other sensors
Node is as transit node), by the transfer of level-one or multistage transit node, it is connected to things-internet gateway, i.e. multi-hop connects
To things-internet gateway.Meanwhile things-internet gateway can support the communication with multiple sensor nodes expansion multidiameter delay simultaneously, but
It is for quantity of the parallel number compared to sensor node in intelligent building that a things-internet gateway can be supported is very
It is limited.Therefore, things-internet gateway is generally all in full load state, and most of sensor node will be by certain time length
Wait state could establish connection with things-internet gateway and execute data transmission；Sensor node can be issued to things-internet gateway and be connect
Enter request, then waits for the response for waiting things-internet gateway in turn；After receiving response, node and things-internet gateway set up communication link
It connects, after completing communication, node discharges road communication connection and establishes communication connection for other sensors node.Object is resulted in this way
Connected network communication has bigger delay.
Certainly, sensor node is jumped except through one and is directly connected to other than things-internet gateway, can also be by multi-hop
Trochanterion is connected to other one or more things-internet gateways, and to the latter linked Internet of Things net of these multi-hop transfers
It closes and issues access request.Communication delay very little between sensor node and transit node, can ignore substantially.Such sensor
When node depends primarily on the delay that data issues with waiting required for the foundation communication connection of some things-internet gateway
Between.
Therefore, in this example, it is assumed that predicted delay time is T, in T time sensor node with apart from it
P is expressed as the i probability for jumping things-internet gateway foundation communication connectioni(T), wherein i=2,3 ..., it is clear that the T time the long then should
Probability value is higher, and the more short then probability value of T time is lower；In this way, allowing to jump range with N for a sensor node
Interior things-internet gateway communicates to connect, then itself and wherein some gateway establish the total probability communicated to connect in delay time T are as follows:
P (T)=P1(T)+P2(T)+P3(T)...+Pn(T), wherein n is the positive integer less than N.
Obviously, the numerical value of n is bigger, and the quantity that sensor node can establish the things-internet gateway of communication connection is more, then
Delay is more likely to decrease.
In this way, the present invention is directed to each sensor node, probability P is set0, and set desired delay time T；It is corresponding
The probability P (T) of expected delay time T has to be larger than P0, then when probability P (T) is greater than P0When, according to final n value, control
The sensor node and n jump the things-internet gateway in range and establish communication connection.
The communication means of the low latency node Internet of Things of the intelligent building application of the embodiment of the present application of the embodiment of the present application,
The delay that can be effectively reduced Internet of Things Network Communication, the data that sensor node is acquired report to the pipe of intelligent building in time
Manage server.
In addition, an alternative embodiment as the application method, in the above-described embodiments, further includes:
When the value of the current probability P (T) is less than or equal to the probability threshold value P0When, determine the current sensor section
Point jumps the probability P that things-internet gateway establishes communication connection with (n+1)thn+1(T)；
By the current probability P (T) and probability Pn+1(T) be added, generate new current probability P (T) ', judge it is described newly
Whether the value of current probability P (T) ' is greater than the probability threshold value P0, if more than the probability threshold value P0, then will be according to final n+1
Value controls the things-internet gateway that the sensor node and n+1 are jumped in range and establishes communication connection.
In addition, in some embodiments, further includes:
Determine that the current sensor node and preceding 1 jumps the probability P that things-internet gateway establishes communication connection1(T), judgement is general
Rate P1(T) whether value is greater than the probability threshold value P0, i.e., first judge the object connecting with the current sensor node direct communication
Whether networking gateway is in full load state, and at the things-internet gateway connecting with the current sensor node direct communication
When full load state, just further according to above-mentioned formula P (T)=P1(T)+P2(T)+P3(T)...+Pn(T) it calculates when described
The value of current probability P (T).
Above description is only the preferred embodiment of the application and the explanation to institute's application technology principle.Those skilled in the art
Member is it should be appreciated that invention scope involved in the application, however it is not limited to technology made of the specific combination of above-mentioned technical characteristic
Scheme, while should also cover in the case where not departing from foregoing invention design, it is carried out by above-mentioned technical characteristic or its equivalent feature
Any combination and the other technical solutions formed.Such as features described above has similar function with (but being not limited to) disclosed herein
Can technical characteristic replaced mutually and the technical solution that is formed.
Claims (10)
1. a kind of low latency node Internet of Things of intelligent building application characterized by comprising
Management server, the multiple things-internet gateways being connect with the management server communication, and, with each things-internet gateway
Multiple sensor nodes of direct communication connection；
For the current sensor node in the multiple sensor node, the current sensor node is used for will be collected
Data are sent to the management server by the things-internet gateway connecting with the current sensor node direct communication, or
The data that first sensor node is sent are received, by the data received by connecting with the current sensor node direct communication
The things-internet gateway connect is sent to the management server, or collected data and/or the data received are sent to
Second sensor node, by the second sensor node by the collected data and/or the data received by with
The things-internet gateway of the second sensor node direct communication connection is sent to the management server, to enable the management take
Business device regulates and controls intelligent building according to receiving data.
2. low latency node Internet of Things according to claim 1, which is characterized in that the things-internet gateway, comprising:
Access request receiving module, for receiving connecing for the sensor node connecting with things-internet gateway direct communication transmission
Enter request, and corresponding sensor node is responded；
Cache module, the data for being sent to the sensor node being connect with the things-internet gateway direct communication received
It is cached；
Data forwarding module, data forwarding for will be cached in the cache module to the management server.
3. according to the method described in claim 2, it is characterized in that, the cache module, specifically for according to receiving and institute
The sequencing for stating the data of the sensor node transmission of things-internet gateway direct communication connection delays the data received
It deposits.
4. according to the method described in claim 3, it is characterized in that, the things-internet gateway, further includes:
Wireless signal transmitting module is straight with the things-internet gateway to enable for emitting wireless signal into the preset range
The sensor node for connecing communication connection is established by the wireless signal and the communication connection of the things-internet gateway.
5. low latency node Internet of Things according to claim 4, which is characterized in that the current sensor node, comprising:
Data acquisition module, for acquiring the data of corresponding types；
Data transmission blocks, for the things-internet gateway being connect with the current sensor node direct communication or described
Two sensor nodes send data；
Data reception module, the data sent for receiving the first sensor node.
6. low latency node Internet of Things according to claim 5, which is characterized in that the current sensor node also wraps
It includes:
Power module, for powering to the data acquisition module, the data transmission blocks and the data reception module.
7. low latency node Internet of Things according to claim 6, which is characterized in that the sensor node includes that temperature passes
Sensor node, humidity sensor node, illuminance sensor node, air quality sensor node and noise transducer node.
8. a kind of communication means of the low latency node Internet of Things of intelligent building application characterized by comprising
Determine the probability threshold value P for allowing delay time T and communication connection is established with things-internet gateway of current sensor node0；
Determine that the current sensor node and preceding n jump the probability P that things-internet gateway establishes communication connectioni(T), wherein i=2,
3……n；
The probability P that things-internet gateway establishes communication connection is jumped to the current sensor node and preceding ni(T) it adds up, obtains
The current probability P (T) of communication connection is established with things-internet gateway；
Judge whether the value of the current probability P (T) is greater than the probability threshold value P0, when the value of the current probability P (T) is greater than
The probability threshold value P0When, the things-internet gateway in the current sensor node and n jump range is controlled according to the value of hop count n
Establish communication connection.
9. according to the method described in claim 8, it is characterized by further comprising:
When the value of the current probability P (T) is less than or equal to the probability threshold value P0When, determine the current sensor node with
(n+1)th jumps the probability P that things-internet gateway establishes communication connectionn+1(T)；
By the current probability P (T) and probability Pn+1(T) be added, generate new current probability P (T) ', judge it is described newly it is current
Probability P (T) ' value whether be greater than the probability threshold value P0。
10. according to the method described in claim 9, it is characterized by further comprising:
Determine that the current sensor node and preceding 1 jumps the probability P that things-internet gateway establishes communication connection1(T), judge probability P1
(T) whether value is greater than the probability threshold value P0。
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