CN108092814B - Adjust sensing net node distribution method and system - Google Patents

Abstract

The invention provides a method and a system for adjusting node allocation of a sensor network. The method for adjusting the distribution of sensor network nodes includes: the monitoring node judges whether the analysis data meets the first preset condition; the gateway sends the pre-acquired first environmental data and the pre-acquired second environmental data to the background system; Whether the environmental data and the second environmental data are greater than the third preset data threshold; the background system sends an instruction to change the current sensor network topology to the gateway; the gateway adjusts the number of current collection nodes according to the instruction to change the current sensor network topology and updates the current Sensor network topology. The present invention predicts the first environmental data of the monitoring area through the monitoring node, so that the background system can analyze and judge the change of the monitoring area in time, and change the topology structure of the sensor network in time through the gateway to adapt to the change of the monitoring area, and The time it takes for the background system to process environmental data and respond to changes in the monitored area is shortened.

Description

Method and system for adjusting sensor network node allocation

technical field

The invention relates to the field of communication technology, in particular to a method and system for adjusting node allocation of a sensor network.

Background technique

As an important part of the Internet of Things, the sensor network is responsible for obtaining the information of the physical world and transmitting it to the background system application. For sensor networks with relatively complex monitoring areas, the existing technology usually collects data through the nodes of the sensor network and transmits it to the background system. The background system performs large-scale data analysis and judges the collection efficiency and reliability of the sensor network. Then, by increasing the number of nodes in the sensor network to change the topology of the sensor network, the data collection efficiency of the sensor network can be improved to adapt to changes in different monitoring areas.

However, due to the large-scale data analysis of the existing technology mainly through the background system, the background system cannot judge the change of the monitoring area in time, so that the topology of the sensor network cannot be changed in time to adapt to the change of the monitoring area, and the increase This reduces the time for the background system to process environmental data and respond to changes in the monitored area.

Contents of the invention

The present invention provides a method and system for adjusting sensor network node allocation, which is used to realize the background system to judge the change of the monitoring area in time, and change the topological structure of the sensor network in time to adapt to the change of the monitoring area, shortening the processing time of the background system for environmental data and the time to respond to changes in the monitored area.

In order to achieve the above object, the present invention provides a method for adjusting sensor network node allocation, the method comprising:

Step S1, the monitoring node judges whether the analysis data generated according to the collected first environmental data satisfies the first preset condition, if so, execute step S2, the first preset condition is that the analysis data is greater than the first preset data threshold And less than the second preset data threshold;

Step S2, the gateway sends the pre-acquired first environmental data and the pre-acquired second environmental data collected by the collection node to the background system;

Step S3, the background system judges whether the first environmental data and the second environmental data are greater than the third preset data threshold, if so, execute step S4;

Step S4, the background system sends an instruction to change the topology of the current sensor network to the gateway;

Step S5 , the gateway adjusts the number of current collection nodes and updates the current sensor network topology according to the command to change the current sensor network topology.

Optionally, if the monitoring node determines that the analysis data does not meet the first preset condition, the method further includes:

Step S11, the monitoring node judges whether the analysis data satisfies a second preset condition, if so, execute step S12, the second preset condition is that the analysis data is greater than a second preset data threshold;

Step S12, the monitoring node sends the first environmental data to the gateway;

Step S13, the gateway adjusts the number of current collection nodes according to the first environmental data and updates the current sensor network topology;

Step S14, the gateway sends the current sensor network topology, first environment data and second environment data to the background system;

Step S15, the background system judges whether the first environmental data and the second environmental data are greater than the third preset data threshold, if so, execute step S16;

Step S16, the background system judges according to the current sensor network topology whether the quantity of the second environmental data collected in the monitoring area of the sensor network after adjusting the number of collection nodes meets the collection requirements of the monitoring area, if not, execute step S17;

Step S17, the background system sends an instruction to change the topology of the current sensor network to the gateway;

Step S18 , the gateway adjusts the number of current collection nodes and updates the current sensor network topology according to the command to change the current sensor network topology.

Optionally, the step S5 includes:

Step S51, the gateway sends work instructions to the first set number of dormant nodes in the monitoring area of the sensor network according to the command to change the current sensor network topology;

Step S52, the first set number of dormant nodes are used as collection nodes according to the work instruction to collect the second environmental data;

Step S53, the gateway updates the current sensor network topology.

Optionally, step S13 includes:

Step S131, the gateway sends work instructions to a first set number of dormant nodes in the monitoring area of the sensor network according to the first environmental data;

Step S132, the first set number of dormant nodes are used as collection nodes according to the work instruction to collect the second environmental data;

Step S133, the gateway updates the current sensor network topology.

Optionally, step S18 includes:

Step S181, the gateway sends work instructions to a second set number of dormant nodes in the monitoring area of the sensor network according to the command to change the current sensor network topology;

Step S182, a second set number of dormant nodes are used as collection nodes according to the work instruction to collect the second environmental data;

Step S183, the gateway updates the current sensor network topology.

Optionally, after step S18, it also includes:

Step S19, the gateway sends the current sensor network topology to the background system;

Step S20, the background system judges whether the environmental data collected by each node of the current sensor network topology is less than the third preset data threshold, if so, execute step S21;

Step S21, the background system sends an instruction to reduce the number of nodes to the gateway;

Step S22 , the gateway makes a set number of dormant nodes enter a dormant state according to the command to reduce the number of nodes, so that the set number of dormant nodes stop collecting the second environmental data.

Optionally, before step S2, it also includes:

Step S201, the monitoring node increases its current data collection frequency to a first preset frequency, and collects first environmental data at the first preset frequency;

Step S202, the monitoring node sends the first environment data to the gateway.

Optionally, before step S12, it also includes:

Step S121 , the monitoring node increases its current data collection frequency to a second preset frequency, and collects the first environmental data at the second preset frequency.

To achieve the above object, the present invention provides a distribution system for adjusting sensor network nodes, the system includes monitoring nodes, collection nodes, gateways and background systems;

The monitoring node is used to judge whether the analytical data generated according to the collected first environmental data satisfies a first preset condition, and the first preset condition is that the analytical data is greater than the first preset data threshold and smaller than the second preset data threshold;

The gateway is used to send the pre-acquired first environmental data and the pre-acquired second environmental data collected by the collection node to the background system if the monitoring node determines that the analysis data generated by the monitoring node according to the collected first environmental data meets the first preset condition. Environmental data; adjust the number of current collection nodes and update the current sensor network topology according to the command to change the current sensor network topology;

The background system is used to judge whether the first environmental data and the second environmental data are greater than the third preset data threshold; if it is determined that the first environmental data and the second environmental data are greater than the third preset When the data threshold is reached, an instruction to change the topology of the current sensor network is sent to the gateway.

Optionally, the monitoring node is further configured to determine whether the analysis data satisfies a second preset condition if it is determined that the analysis data does not meet the first preset condition, and the second preset condition is that the analysis The data is greater than the second preset data threshold; if it is judged that the analyzed data meets the second preset condition, the first environmental data is sent to the gateway;

The gateway is also used to adjust the number of current collection nodes and update the current sensor network topology according to the first environmental data; send the current sensor network topology, first environmental data and second environmental data to the background system; The sensor network topology command adjusts the number of current collection nodes and updates the current sensor network topology;

The background system is also used to determine whether the first environmental data and the second environmental data are greater than a third preset data threshold; if it is determined that both the first environmental data and the second environmental data are greater than the third When three preset data thresholds are used, judge whether the quantity of the second environmental data collected after adjusting the number of collection nodes in the monitoring area of the sensor network meets the collection requirements of the monitoring area according to the current sensor network topology; When the amount of the second environmental data collected after adjusting the number of collection nodes in the monitoring area does not meet the collection requirements of the monitoring area, an instruction to change the topology of the current sensor network is sent to the gateway.

Beneficial effects of the present invention:

In the technical solution for adjusting the sensor network node allocation method and system provided by the present invention, the first environmental data in the monitoring area is predicted through the monitoring nodes, and the background system is used to judge whether the first environmental data and the second environmental data are greater than the first environmental data. Three preset data thresholds, if it is, it indicates that there is an abnormality in the monitoring area, so that the background system can analyze and judge the changes in the monitoring area in a timely manner, and send instructions to the gateway to change the topology of the current sensor network in a timely manner, so that the gateway can timely detect Adjust the number of current collection nodes and update the current sensor network topology to adapt to changes in the current monitoring area, and shorten the time for the background system to process environmental data and respond to changes in the monitoring area.

Description of drawings

FIG. 1 is a flowchart of a method for adjusting sensor network node allocation provided by Embodiment 1 of the present invention;

FIG. 2 is a flowchart of a method for adjusting sensor network node allocation provided by Embodiment 2 of the present invention;

FIG. 3 is a schematic structural diagram of a distribution system for adjusting sensor network nodes provided by Embodiment 3 of the present invention.

Detailed ways

In order to enable those skilled in the art to better understand the technical solution of the present invention, the method and system for adjusting sensor network node allocation provided by the present invention will be described in detail below with reference to the accompanying drawings.

Fig. 1 is a flowchart of a method for adjusting sensor network node allocation provided by Embodiment 1 of the present invention. As shown in Fig. 1, the method includes:

Step 101, the monitoring node judges whether the analysis data generated according to the collected first environmental data satisfies the first preset condition, if so, execute step 102, the first preset condition is that the analysis data is greater than the first preset data threshold and less than the second Preset data thresholds.

Step 102, the gateway sends the pre-acquired first environment data and the pre-acquired second environment data collected by the collection node to the background system.

Step 103 , the background system judges whether the first environment data and the second environment data are both greater than the third preset data threshold, and if so, execute step 104 .

Step 104, the background system sends an instruction to change the topology of the current sensor network to the gateway.

Step 105 , the gateway adjusts the number of current collection nodes and updates the current sensor network topology according to the command to change the current sensor network topology.

The method for adjusting sensor network node allocation provided in this embodiment uses the monitoring nodes to judge whether the analytical data generated according to the collected first environmental data meets the first preset condition, and realizes the monitoring of the first environmental data of the monitoring area through the monitoring nodes. Carry out a pre-judgment, and then send the first environmental data and the second environmental data collected by the collection node to the background system through the gateway, and the background system judges whether the first environmental data and the second environmental data are greater than the third preset data threshold, and if so , indicating that there is an abnormality in the monitoring area, so that the background system can analyze and judge the changes in the monitoring area in a timely manner, and send instructions to the gateway to change the topology of the current sensor network in a timely manner, so that the gateway can adjust the number of current collection nodes in a timely manner. And update the current sensor network topology to adapt to changes in the current monitoring area. The method for adjusting sensor network node allocation provided in this embodiment shortens the time for the background system to process environmental data and respond to changes in the monitoring area.

Fig. 2 is a flowchart of a method for adjusting sensor network node allocation provided by Embodiment 2 of the present invention. As shown in Fig. 2, the method includes:

Step 201, the monitoring node collects first environmental data, and generates analysis data according to the first environmental data.

Specifically, the monitoring node collecting the first environmental data specifically includes: the monitoring node collecting the first environmental data of the physical environment where the sensor network is located.

Specifically, the generating the analysis data according to the first environment data specifically includes: performing data encapsulation processing on the first environment data to generate the analysis data.

In this embodiment, the physical environment where the sensor network is located is provided with gateways and monitoring nodes. Wherein, the monitoring node is set in an area close to the gateway. In this embodiment, the physical environment is the monitoring area of the sensor network.

Step 202, the collection node collects the second environment data.

In this embodiment, common collection nodes are also set in the physical environment where the sensor network is located, wherein the function of the collection nodes is to collect the second environmental data.

In this embodiment, a dormant node is also set in the physical environment where the sensor network is located. The dormant node is an ordinary node pre-set in the physical environment where the sensor network is located. Generally, it is in a dormant state and does not participate in the collection of second environmental data. work, but under certain circumstances, it can be triggered by the gateway to wake it up, so that the dormant node can join the collection of the second environmental data of the sensor network. In this embodiment, the dormant node after the wake-up is triggered has the same function as the collection node. In this embodiment, the number of sleepy nodes is A, where A is a preset number.

It should be noted that this implementation does not impose any limitation on the execution sequence of step 201 and step 202, and may also be executed simultaneously.

In this embodiment, the difference between the monitoring node, the collection node and the dormant node is that neither the collection node nor the dormant node has the function of parsing and encapsulating environmental data.

Step 203, the collection node sends the second environment data to the gateway.

In this embodiment, the collection node can upload the second environmental data to the gateway through the pre-set sensor network routing, and the gateway will perform data processing, such as data compression and integration or protocol conversion, and the gateway will pass through the data. The processed second environment data is uploaded to the background system.

Since ordinary collection nodes do not have the function of parsing and encapsulating environmental data, after collecting the second environmental data, the collection node can directly send the second environmental data to the gateway.

Step 204 , the monitoring node judges whether the analyzed data satisfies the third preset condition. The third preset condition is that the analyzed data is smaller than the first preset data threshold. If yes, execute step 205 ; if not, execute step 207 .

In this embodiment, the monitoring node presets two levels of data thresholds M and N, wherein, M<N, M is the first preset data threshold, and N is the second preset data threshold. Specifically, the monitoring node judges whether the analysis data X satisfies the third preset condition X<M, and if so, executes step 205, and if not, executes step 207, where X is the analysis data.

Step 205, the monitoring node sends the analyzed data to the gateway.

When in step 204, the monitoring node determines that the analysis data is less than the first preset data threshold, it indicates that the monitoring node determines that the first environmental data in the monitoring area is not abnormal, that is, there is no abnormality in the monitoring area, so directly executing the monitoring will analyze the data Steps to send to the gateway.

Step 206, the gateway sends the analysis data and the second environment data to the background system, and ends the process.

Specifically, for the gateway, after the gateway receives the analytical data of the monitoring node and the second environmental data of the collection node, the gateway performs the same data processing on the analytical data of the monitoring node and the second environmental data of the collection node, for example, the data Data processing such as compression integration or protocol conversion, and sending the analyzed data after data processing and the second environment data after data processing to the background system. After the background system receives the analysis data and the second environment data, it can also perform decapsulation or protocol conversion on the analysis data and the second environment data, store them, and compare and analyze the data to confirm whether the data is abnormal. Among them, the steps of data comparison and analysis to confirm whether the data is abnormal can refer to step 211 to step 217, which will not be described in detail here, but it should be noted that when it is confirmed that the data is not abnormal, there is no need to perform the method of reducing the collection frequency of the monitoring node. step, because the collection frequency of the monitoring node at this time is still the normal collection frequency, and there is no need to reduce it. In this embodiment, after the analysis data is decapsulated, the first environment data is generated.

Step 207, the monitoring node judges whether the analysis data meets the first preset condition, the first preset condition is that the analysis data is greater than the first preset data threshold and less than the second preset data threshold, if yes, execute step 208, if not, execute 218.

Specifically, the monitoring node judges whether the analysis data X satisfies M<X<N, if so, execute step 208, if not, execute 218.

Step 208 , the monitoring node increases its current data collection frequency to a first preset frequency, and continues to collect the first environmental data at the first preset frequency.

For example, the normal collection frequency of the monitoring node is 3 times per second, the current self-data collection frequency of the monitoring node is the normal collection frequency, the first preset frequency is 4 times per second, when the monitoring node judges that the analysis data meets the second preset After the conditions are met, the monitoring node increases the current self-data collection frequency to 4 times/second, and continues to collect the first environmental data at a collection frequency of 4 times/second.

Step 209, the monitoring node sends the first environmental data to the gateway.

In this embodiment, each time the monitoring node collects the first environmental data, it uploads the first environmental data to the gateway. Therefore, the collection frequency of the monitoring node is the same as the uploading frequency of the monitoring node. The frequency at which the gateway sends the first environment data. The gateway can determine the change of the collection frequency of the monitoring node by identifying the change of the uploading frequency of the monitoring node.

Step 210, the gateway sends the first environment data and the second environment data to the background system.

Specifically, after the gateway judges that the collection frequency of the monitoring node has changed according to the change of the uploading frequency of the monitoring node, that is, after judging that the collection frequency of the monitoring node has increased from 3 times per second to 4 times per second, the gateway assigns the first environmental data Higher priority, priority queued to send to the background system.

As for the second environmental data collected by the collection node, the gateway can directly send it to the background system. In this embodiment, when the gateway uploads the first environment data and the second environment data to the background system, it will assign different priority levels to the first environment data and the second environment data. When the monitoring node determines that the analytical data is greater than the first preset data threshold and less than the second preset data threshold, the monitoring node adjusts its current data collection frequency, and the gateway identifies the monitoring node’s collection frequency according to the first environmental data sent by the monitoring node After the change occurs, give the first environment data a higher priority and send it to the background system in a priority queue, so that the background system can perform subsequent steps.

Step 211 , the background system judges whether the first environmental data and the second environmental data are greater than the third preset data threshold, if not, execute step 212 , if yes, execute step 215 .

Specifically, if it is determined that the first environmental data is less than the third preset data threshold and the second environmental data is less than the third preset data threshold, then the background system can determine that there is no abnormality in the monitoring area where the monitoring node is located; or, If it is determined that the first environmental data is greater than the third preset data threshold but the second environmental data is less than the third preset data threshold, then the background system can determine that there is no abnormality in the monitoring area where the monitoring node is located. No abnormality occurs in the monitoring area of the monitoring node, indicating that the analysis data determined by the monitoring node is greater than the first preset data threshold is also an exception. Therefore, after the background system determines that no abnormality occurs, step 212 is executed.

If it is determined that the first environmental data is greater than the third preset data threshold and the second environmental data is greater than the third preset data threshold, then the background system can determine that there is an abnormality in the monitoring area where the monitoring node is located. Anomalies appear in the monitoring area of the monitoring node, indicating that the analysis data judged by the monitoring node is greater than the first preset data threshold and less than the second preset data threshold is not an individual case. Therefore, after the background system makes an abnormal judgment , go to step 215.

In this embodiment, preferably, the third preset data threshold is equal to the first preset data threshold M .

Step 212, the background system sends an instruction to the gateway to maintain the topology of the sensor network.

Step 213 , the gateway sends a down-frequency instruction to the monitoring node according to the instruction of maintaining the topology structure of the sensor network.

Step 214 , the monitoring node reduces the current data collection frequency of itself according to the frequency reduction instruction, and executes step 201 .

For example, the current data collection frequency of the monitoring node is 4 times per second. After receiving the frequency reduction command, the monitoring node will reduce the current data collection frequency to the normal collection frequency of 3 times per second, and continue to collect the first environment at the normal collection frequency. data.

Since in step 211, the background system judges that there is no abnormal situation in the monitoring area, it is necessary to reduce the current self-data collection frequency of the monitoring node to the normal collection frequency, therefore, step 212 to step 214 are executed.

Step 215, the background system sends an instruction to change the topology of the sensor network to the gateway.

In step 211, when the background judges that there is an abnormality in the monitoring area, it indicates that the current sensor network topology needs to be changed to adapt to the change of the monitoring area, that is, the abnormality in the current monitoring area, so step 215 is executed.

In step 216, the gateway adjusts the number of current collection nodes and updates the current sensor network topology according to the command to change the current sensor network topology.

Specifically, step 216 includes:

Step 216a, the gateway sends a work instruction to a first set number of dormant nodes in the monitoring area of the sensor network according to the instruction to change the topology structure of the sensor network.

In this embodiment, the first set number is B, where B is a preset number, and B<A. Specifically, the gateway sends work instructions to the B dormant nodes in the monitoring area, so as to trigger the awakening of the B dormant nodes.

Step 216b, the first set number of dormant nodes act as collection nodes according to the work instruction to collect the second environmental data.

Specifically, at this time, B dormant nodes are triggered to wake up, and the dormant nodes that are triggered to wake up are equivalent to ordinary collection nodes, and have the same function as ordinary collection nodes. However, there are A-B dormant nodes still in a dormant state, not participating in the collection of the second environment data. In other words, after receiving the command to change the topology of the sensor network, the gateway adds a first set number of dormant nodes as collection nodes to collect the second environmental data.

Step 216c, the gateway updates the current sensor network topology.

Due to the addition of B dormant nodes for data collection, the topology of the current sensor network changes, so the gateway needs to update the topology of the current sensor network.

Step 217, the gateway returns the current sensor network topology to the background system, and executes step 230.

Since the gateway updates the current sensor network topology, the background system also needs to update the current sensor network topology and archive it. Therefore, the gateway needs to return the updated current sensor network topology to the background system, so that the background system can update and archive the current sensor network topology.

Specifically, step 230 is performed after a period of time of collecting the second environment data with B dormant nodes added as collection nodes.

Step 218 , the monitoring node increases its current data collection frequency to a second preset frequency, and continues to collect the first environmental data at the second preset frequency.

Specifically, the monitoring node judges that the analyzed data neither satisfies the third preset condition nor the first preset condition, indicating that the monitoring node judges that the analyzed data satisfies the second preset condition, and the second preset condition is that the analyzed data is greater than The second preset data threshold. At this point, step 218 is executed.

For example, the normal collection frequency of the monitoring node is 3 times per second, the current self-data collection frequency of the monitoring node is the normal collection frequency, and the second preset frequency is 5 times per second, when it is judged that the analytical data neither satisfies the third preset The condition X<M<N does not meet the first preset condition M<X<N, that is, after judging that the analysis data meets the second preset condition M<N<X, the monitoring node increases the current data collection frequency to 5 times/second, and continue to collect the first environmental data at a collection frequency of 5 times/second. Since the collection frequency of the monitoring node is the same as the upload frequency, an increase in the collection frequency indicates that the upload frequency also increases accordingly.

Step 219, the monitoring node sends the first environmental data to the gateway.

Step 220, the gateway adjusts the number of current collection nodes and updates the current sensor network topology according to the first environment data.

Specifically, step 220 includes:

In step 220a, the gateway sends work instructions to a first set number of dormant nodes in the monitoring area according to the first environmental data.

Specifically, the gateway judges that the upload frequency of the monitoring node has changed according to the received first environmental data, and increases from 3 times per second to 5 times per second, that is, the collection frequency is increased by two levels, and it is judged that the collection frequency of the monitoring node has changed After that, automatically send work instructions to the first set number of dormant nodes in the monitoring area.

In this embodiment, the first set number is B, where B is a preset number, and B<A. Specifically, the gateway sends work instructions to the B dormant nodes in the monitoring area, so as to trigger the awakening of the B dormant nodes.

In step 220b, the first set number of dormant nodes, according to the work instruction, act as collection nodes to collect the second environmental data.

Specifically, at this time, B dormant nodes are triggered to wake up, and the dormant nodes that are triggered to wake up are equivalent to ordinary collection nodes, and have the same function as ordinary collection nodes. However, there are A-B dormant nodes still in a dormant state, not participating in the collection of the second environment data.

Step 220c, the gateway updates the current sensor network topology.

Due to the addition of B dormant nodes for data collection, the topology of the current sensor network changes, so the gateway needs to update the topology of the current sensor network.

Step 221, the gateway sends the current sensor network topology, the first environment data and the second environment data to the background system.

Since the gateway has updated the current sensor network topology, the background system also needs to update the current sensor network topology and archive it. Therefore, the gateway needs to send the updated current sensor network topology to the background system and send the first environment The data and the second environment data are sent to the background system for subsequent steps.

Step 222 , the background system judges whether the first environmental data and the second environmental data are greater than the third preset data threshold, if not, execute step 223 , and if yes, execute step 226 .

Specifically, if it is determined that the first environmental data is less than the third preset data threshold and the second environmental data is less than the third preset data threshold, then the background system can determine that there is no abnormality in the monitoring area where the monitoring node is located; or, If it is determined that the first environmental data is greater than the third preset data threshold but the second environmental data is less than the third preset data threshold, then the background system can determine that there is no abnormality in the monitoring area where the monitoring node is located. No abnormality occurs in the monitoring area of the monitoring node, indicating that the analysis data determined by the monitoring node is greater than the first preset data threshold is also an exception. Therefore, after the background system determines that no abnormality occurs, step 223 is executed.

If it is determined that the first environmental data is greater than the third preset data threshold and the second environmental data is greater than the third preset data threshold, then the background system can determine that there is an abnormality in the monitoring area where the monitoring node is located. Anomalies appear in the monitoring area of the monitoring node, indicating that the analysis data judged by the monitoring node is greater than the first preset data threshold and less than the second preset data threshold is not an individual case. Therefore, after the background system makes an abnormal judgment , go to step 226.

Step 223, the background system sends an instruction to the gateway to maintain the topology of the sensor network.

Step 224, the gateway sends a frequency reduction instruction to the monitoring node according to the instruction of maintaining the sensor network topology.

Step 225 , the monitoring node reduces the current data collection frequency of itself according to the frequency reduction instruction, and executes step 230 .

For example, the current data collection frequency of the monitoring node is 5 times per second. After receiving the frequency reduction command, the monitoring node will reduce the current self-data collection frequency to the normal collection frequency of 3 times per second, and continue to collect the first environment at the normal collection frequency data.

After the background system makes a judgment that there is no abnormal situation, the monitoring node reduces the current data collection frequency, but because the current sensor network topology is still in the state of adding B dormant nodes as collection nodes to collect the second environmental data , since there is no abnormal situation in the monitoring area, when the current sensor network topology is in this state to collect environmental data for a period of time, the background system needs to judge whether to reduce the number of collection nodes, that is, execute step 230.

Step 226, the background system judges according to the current sensor network topology whether the quantity of the second environmental data collected by the monitoring area of the sensor network after adjusting the number of collection nodes meets the collection requirements of the monitoring area, if so, the background system does not do any processing , go to step 230, if not, go to step 227.

Specifically, the background system judges whether the quantity of the second environmental data collected after adding the first set number of dormant nodes as collection nodes in the monitoring area of the sensor network meets the collection requirements of the monitoring area according to the current sensor network topology. , the background system does not perform any processing, and executes step 230 , otherwise, executes step 227 .

Specifically, since the quantity of the second environmental data collected after adding the first set number of dormant nodes as collection nodes meets the collection requirements of the monitoring area, it indicates that the current sensor network topology does not need to be changed. Therefore, when it is judged that in When the number of second environmental data collected after adding the first set number of dormant nodes as collection nodes meets the collection requirements of the monitoring area, add B dormant nodes as collection nodes to collect the second environmental data for a period of time After that, step 230 is performed.

Step 227, the background system sends an instruction to change the topology of the sensor network to the gateway.

Since the addition of B dormant nodes as collection nodes still fails to meet the collection requirements of the monitoring area, the background system also needs to adjust the number of collection nodes in the monitoring area of the sensor network through the gateway.

In step 228, the gateway adjusts the number of current collection nodes and updates the current sensor network topology according to the command to change the current sensor network topology.

Specifically, step 228 includes:

In step 228a, the gateway sends a work instruction to a second set number of dormant nodes according to the instruction to change the topology of the sensor network.

Wherein, the second set quantity is A-B. Since the gateway in step 220 has triggered to wake up the B dormant nodes, the remaining A-B dormant nodes are still in dormant state. When the background system judges that the second environment data is still collected after adding the first set number of dormant nodes as collection nodes When the number does not meet the collection requirements of the monitoring area, the gateway continues to trigger the remaining A-B dormant nodes as collection nodes to collect the second environmental data.

In step 228b, a second set number of dormant nodes are used as collection nodes to collect the second environmental data according to the work instruction.

At this time, in the monitoring area of the sensor network, a total of B+A-B=A dormant nodes are added to collect the second environmental data.

Step 228c, the gateway updates the current sensor network topology.

On the basis of adding B dormant nodes as collection nodes, A-B dormant nodes are added as collection nodes to collect the second environmental data, which changes the topology of the current sensor network, so the gateway needs to update the current sensor network Topology.

Step 229, the gateway sends the current sensor network topology to the background system.

Since the gateway updates the current sensor network topology, the background system also needs to update and archive the current sensor network topology. Therefore, the gateway needs to send the updated current sensor network topology to the background system.

Step 230, the background system judges whether the environmental data collected by each node of the current sensor network topology is less than the third preset data threshold, if yes, execute step 231, if not, execute step 237.

It is not difficult to understand that each node of the current sensor network topology is a monitoring node, a collection node, and a dormant node that has been triggered to wake up.

After adding the first set number of dormant nodes or the first set number plus the second set number of dormant nodes as collection nodes to collect the second environmental data for a period of time, when the background system judges that the current transmission The environmental data collected by each node of the sensor network topology is less than the third preset data threshold, indicating that the abnormal situation in the monitoring area has been removed, and the monitoring area has returned to a normal state. Therefore, it is not necessary to use the current sensor network topology to perform environmental data The collection work, so the number of collection nodes of the sensor network can be appropriately reduced.

Step 231, the background system sends an instruction to reduce the number of nodes to the gateway.

Step 232 , the gateway makes a set number of dormant nodes enter a dormant state according to the command to reduce the number of nodes, so that the set number of dormant nodes stop collecting the second environmental data.

Step 233, the gateway updates the current sensor network topology.

Due to the reduction of the set number of dormant nodes, the topology of the current sensor network changes, so the gateway needs to update the topology of the current sensor network.

In this embodiment, after step 228, the above step 229 to step 233 can be executed twice, specifically, when step 229 to step 233 is executed for the first time, in step 232, the second set number A-B dormant nodes Entering the dormant state, so that the second set number A-B dormant nodes stop collecting the second environmental data. When steps 229 to 233 are executed for the second time, the first set number B of dormant nodes are put into a dormant state, so that the first set number B of dormant nodes stop collecting the second environmental data.

After the above steps 229 to 233 are executed in a loop twice, all dormant nodes in the monitoring area have entered the dormant state, that is, A dormant nodes have returned to the initial state, and the collection of the second environmental data is stopped. At this time, among the nodes in the monitoring area of the current sensor network, only the monitoring node and the collection node are collecting environmental data.

It should be noted that in step 217, step 225 and step 226, the setting of jumping to step 230 is made, because in step 217, step 225 and step 226, the current sensor network topology is still in the Added B dormant nodes as the state of the collection nodes, therefore, step 230 needs to be performed to judge whether the current collected environmental data tends to be normal, if normal, reduce the number of collection nodes of the sensor network, step 217 , in step 225 and step 226, after jumping to step 230, step 231 to step 233 are only executed once, and the B dormant nodes are directly dormant, so that the B dormant nodes enter the dormant state, and the collection of the second environmental data is stopped .

Step 234, the gateway sends a frequency reduction instruction to the monitoring node.

In step 235, the monitoring node reduces the current data collection frequency of itself according to the frequency reduction instruction.

For example, the current data collection frequency of the monitoring node is 5 times per second. After receiving the frequency reduction command, the monitoring node will reduce the current self-data collection frequency to the normal collection frequency of 3 times per second, and continue to collect the first environment at the normal collection frequency data.

Step 236, the gateway sends the current sensor network topology structure to the background system, and ends the process.

At this point, the current sensor network topology returns to the initial state, that is, the state when no dormant nodes are added as collection nodes.

Step 237 , the background system continues to receive the environmental data collected by each node of the current sensor network topology, and continues to execute step 230 .

If the background system judges that the environmental data collected by each node of the current sensor network topology is not less than the third preset data threshold, indicating that the monitoring area is still in an abnormal state, and the abnormal situation has not been resolved, then the current sensor network can continue to be maintained Topological structure, continue to collect environmental data, and continue to execute step 230 to judge at intervals until it is judged that the abnormal situation in the monitoring area has been resolved.

In the method for adjusting sensor network node allocation provided in this embodiment, the monitoring node sets the two-level preset data threshold, and compares the relationship between the analysis data and the two-level preset data threshold, and realizes the monitoring node's first allocation of the monitoring area. The first environmental data is pre-judged, and then the first environmental data and the second environmental data collected by the collection node are sent to the background system through the gateway, and the background system judges whether the first environmental data and the second environmental data are greater than the third preset data The threshold, if it is, indicates that there is an abnormality in the monitoring area, so that the background system can judge the change of the monitoring area in time, and send the command to change the topology of the current sensor network to the gateway in time, so that the gateway can adjust the current sensor network topology in a timely manner. Quantity, and update the current sensor network topology to adapt to changes in the current monitoring area. The method for adjusting sensor network node allocation provided in this embodiment shortens the time for the background system to process environmental data and respond to changes in the monitoring area.

FIG. 3 is a schematic structural diagram of a distribution system for adjusting sensor network nodes provided by Embodiment 3 of the present invention. As shown in FIG.

Wherein, the monitoring node 301 is used to judge whether the analytical data generated according to the collected first environmental data satisfies the first preset condition, and the first preset condition is that the analytical data is greater than the first preset data threshold and smaller than the second threshold. Preset data thresholds.

The gateway 303 is used to send the pre-acquired first environmental data and the pre-acquired collection node to the background system 304 if the monitoring node 301 determines that the analysis data generated by the monitoring node 301 according to the collected first environmental data satisfies the first preset condition. The second environmental data collected at 302; adjust the number of current collection nodes 302 and update the current sensor network topology according to the command to change the current sensor network topology.

The background system 304 is used to determine whether the first environmental data and the second environmental data are greater than a third preset data threshold; if it is determined that both the first environmental data and the second environmental data are greater than the third predetermined When the data threshold is set, an instruction to change the current sensor network topology is sent to the gateway 303 .

In this embodiment, preferably, the monitoring node 301 is further configured to determine whether the analyzed data satisfies a second preset condition if it is determined that the analyzed data does not meet the first preset condition, and the second preset condition is The analyzed data is greater than the second preset data threshold; if it is judged that the analyzed data meets the second preset condition, the first environment data is sent to the gateway 303 .

The gateway 303 is also used to adjust the number of current acquisition nodes 302 and update the current sensor network topology according to the first environment data; send the current sensor network topology, the first environment data and the second environment data to the background system 304; The current sensor network topology instruction adjusts the number of current collection nodes 302 and updates the current sensor network topology.

The background system 304 is also used to determine whether the first environmental data and the second environmental data are greater than a third preset data threshold; if it is determined that both the first environmental data and the second environmental data are greater than the third When the data threshold is preset, it is judged according to the current sensor network topology whether the quantity of the second environmental data collected after adjusting the number of collection nodes 302 in the monitoring area of the sensor network meets the collection requirements of the monitoring area; When the amount of second environmental data collected after adjusting the number of collection nodes 302 in the monitoring area does not meet the collection requirements of the monitoring area, an instruction to change the topology of the current sensor network is sent to the gateway 303 .

The allocation system for adjusting sensor network nodes provided in this embodiment is used to realize the allocation method for adjusting sensor network nodes provided in the second embodiment above. For a specific description, please refer to the second embodiment above, which will not be repeated here.

In the distribution system for adjusting sensor network nodes provided in this embodiment, the monitoring node sets the two-level preset data threshold, and compares the relationship between the analysis data and the two-level preset data threshold, thereby realizing the allocation of the monitoring area by the monitoring node. The first environmental data is pre-judged, and then the first environmental data and the second environmental data collected by the collection node are sent to the background system through the gateway, and the background system judges whether the first environmental data and the second environmental data are greater than the third preset The data threshold, if it is, indicates that there is an abnormality in the monitoring area, so that the background system can judge the change of the monitoring area in time, and send instructions to the gateway to change the topology of the current sensor network in time, so that the gateway can adjust the current collection node in time and update the topology of the current sensor network to adapt to changes in the current monitoring area. The method for adjusting sensor network node allocation provided in this embodiment shortens the time for the background system to process environmental data and respond to changes in the monitoring area.

It can be understood that, the above embodiments are only exemplary embodiments adopted for illustrating the principle of the present invention, but the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also regarded as the protection scope of the present invention.

Claims (10)

1. a kind of distribution method for adjusting sensing net node characterized by comprising

Step S1, monitoring node judges whether the parsing data generated according to the first environment data of acquisition meet the first default item Part, if so, executing step S2, first preset condition is the parsing data greater than the first preset data threshold value and less than the Two preset data threshold values；

Step S2, gateway sends the first environment data that obtain in advance to background system and the acquisition node that obtains in advance acquires Second environment data；

Step S3, background system judges whether the first environment data and the second environment data are all larger than third present count According to threshold value, if so, executing step S4；

Step S4, background system is sent to gateway changes current sensor net topology organization instruction；

Step S5, gateway adjusts the quantity of current acquisition node according to change current sensor net topology organization instruction and updates current Sensor Network topological structure.

2. the distribution method of adjustment sensing net node according to claim 1, which is characterized in that if monitoring node is judged When the parsing data are unsatisfactory for the first preset condition, the method also includes:

Step S11, monitoring node judges whether the parsing data meet the second preset condition, if so, executing step S12, institute Stating the second preset condition is that the parsing data are greater than the second preset data threshold value；

Step S12, monitoring node sends first environment data to gateway；

Step S13, gateway according to the quantity of the current acquisition node of first environment data point reuse and updates current sensor net topology knot Structure；

Step S14, gateway sends current sensor net topology structure, first environment data and second environment data to background system；

Step S15, it is default to judge whether the first environment data and the second environment data are all larger than third for background system Data threshold, if so, executing step S16；

Step S16, background system is according to the monitoring region of current sensor net topology structure decision Sensor Network in adjustment acquisition node Quantity after the quantity of second environment data that acquires whether meet the acquisition demand in monitoring region, if it is not, executing step S17；

Step S17, background system is sent to gateway changes current sensor net topology organization instruction；

Step S18, according to changing, current sensor net topology organization instruction adjusts the quantity of current acquisition node to gateway and update is worked as Preceding sensing net topology structure.

3. the distribution method of adjustment sensing net node according to claim 1, which is characterized in that the step S5 includes:

Step S51, first setting of the gateway according to change current sensor net topology organization instruction into the monitoring region of Sensor Network Quantity suspend mode node sends work order；

Step S52, the first setting quantity suspend mode node carries out second environment data as acquisition node according to work order Collecting work；

Step S53, gateway updates current sensor net topology structure.

4. the distribution method of adjustment sensing net node according to claim 2, which is characterized in that step S13 includes:

Step S131, first setting quantity suspend mode node of the gateway according to first environment data into the monitoring region of Sensor Network Send work order；

Step S132, the first setting quantity suspend mode node carries out second environment data as acquisition node according to work order Collecting work；

Step S133, gateway updates current sensor net topology structure.

5. the distribution method of adjustment sensing net node according to claim 2, which is characterized in that step S18 includes:

Step S181, second setting of the gateway according to change current sensor net topology organization instruction into the monitoring region of Sensor Network Quantity suspend mode node sends work order；

Step S182, the second setting quantity suspend mode node carries out second environment data as acquisition node according to work order Collecting work；

Step S183, gateway updates current sensor net topology structure.

6. the distribution method of adjustment sensing net node according to claim 4, which is characterized in that also wrapped after step S18 It includes:

Step S19, gateway sends current sensor net topology structure to background system；

Step S20, background system judges whether the environmental data of each node acquisition of current sensor net topology structure is respectively less than the Three preset data threshold values, if so, executing step S21；Wherein, each node of current sensor net topology structure is respectively to monitor section Point, acquisition node and the suspend mode node being triggered and wake-up as acquisition node；

Step S21, background system sends reduction number of nodes instruction to gateway；

Step S22, gateway makes setting quantity suspend mode node enter dormant state according to reduction number of nodes instruction, so that setting The collecting work of quantity suspend mode node stopping second environment data.

7. the distribution method of adjustment sensing net node according to claim 1, which is characterized in that also wrapped before step S2 It includes:

Step S201, current data frequency acquisition is promoted to the first predeterminated frequency by monitoring node, and with the first default frequency Rate acquires first environment data；

Step S202, first environment data are sent to gateway by monitoring node.

8. the distribution method of adjustment sensing net node according to claim 2, which is characterized in that also wrapped before step S12 It includes:

Step S121, current data frequency acquisition is promoted to the second predeterminated frequency by monitoring node, and with the second default frequency Rate acquires first environment data.

9. it is a kind of adjust sensing net node distribution system, which is characterized in that including monitoring node, acquisition node, gateway and after Platform system；

Monitoring node is used to judge whether meet the first preset condition according to the parsing data of the first environment data of acquisition generation, First preset condition is that the parsing data are greater than the first preset data threshold value and less than the second preset data threshold value；

If gateway judges that monitoring node meets according to the parsing data that the first environment data of acquisition generate for monitoring node When the first preset condition, the first environment data that obtain in advance are sent to background system and the acquisition node acquisition that obtains in advance Second environment data；According to changing, current sensor net topology organization instruction adjusts the quantity of current acquisition node and forward pass is worked as in update Feel net topology structure；

Background system is for judging whether the first environment data and the second environment data are all larger than third preset data Threshold value；If judge that the first environment data and the second environment data are all larger than third preset data threshold value, to net It closes to send and changes current sensor net topology organization instruction.

10. the distribution system of adjustment sensing net node according to claim 9, which is characterized in that

If the monitoring node is also used to judge that the parsing data are unsatisfactory for the first preset condition, the parsing data are judged Whether second preset condition is met, and second preset condition is that the parsing data are greater than the second preset data threshold value；If sentencing When the disconnected parsing data described out meet the second preset condition, first environment data are sent to gateway；

The gateway is also used to the quantity according to the current acquisition node of first environment data point reuse and updates current sensor net topology Structure；Current sensor net topology structure, first environment data and second environment data are sent to background system；It is current according to changing The instruction of Sensor Network topological structure adjusts the quantity of current acquisition node and updates current sensor net topology structure；

It is pre- that the background system is also used to judge whether the first environment data and the second environment data are all larger than third If data threshold；If judging, the first environment data and the second environment data are all larger than third preset data threshold value When, according to the monitoring region of current sensor net topology structure decision Sensor Network adjustment acquisition node quantity after acquire second Whether the quantity of environmental data meets the acquisition demand in monitoring region；If judging the monitoring region of Sensor Network in adjustment acquisition node Quantity after the quantity of second environment data that acquires when being unsatisfactory for the acquisition demand in monitoring region, sent to gateway change it is current The instruction of Sensor Network topological structure.