CN115550922A - A sensor network relay transmission method and device based on energy perception - Google Patents

Abstract

The invention relates to a relay transmission method and a relay transmission device for a sensor network based on energy perception, wherein the method comprises the following steps: and in the initialization stage, the relay node identity is acquired through gateway authentication. In the relay transmission stage, judging whether a window time which wakes up in advance is reached, if so, monitoring data sent by the sensing node, and if not, continuing to wait; receiving related data sent by a sensing node, extracting identity information and related load information of the sensing node, and storing the identity information and the related load information into a relay transmission data queue; and after the time of the receiving window is up, combining the data of the sensing nodes with the sensing data of the sensing nodes according to the number of the forwarding sensing nodes and a black-and-white list system of the sensing nodes, marking the energy parameters of the sensing nodes, and generating and sending a corresponding data packet. The invention can ensure the lowest power consumption of the sensing node of the whole network.

Description

A sensor network relay transmission method and device based on energy perception

technical field

The invention relates to the technical field of wireless transmission, in particular to an energy-aware-based sensor network relay transmission method and device.

Background technique

In recent years, accidents of hazardous chemicals in the storage process have occurred from time to time, exposing problems such as chaotic management of hazardous chemicals in some chemical companies, backward risk warning methods for safe production and storage, and lack of early warning information systems. It has become an important means of safe production, transportation and storage to improve the informatization and intelligence level of safety warning of hazardous chemicals.

At present, the wireless sensor network has been introduced into the monitoring of hazardous chemical warehouses, and the environmental information of the warehouses is collected through multiple sensors to improve the informatization and intelligence level of hazardous chemical safety warnings. In terms of wireless communication, high-frequency wireless communication technologies such as Wi-Fi, Bluetooth, and ZigBee will be subject to many restrictions due to their short transmission distances. In the long-distance low-power wireless technology (LPWAN communication technology), it is mainly represented by long-distance wireless transmission technology based on spread spectrum technology and narrowband Internet of Things technology. Among them, narrowband Internet of Things technology is built on mobile cellular networks and relies on the base station Deployment, in the scenario of hazardous chemical warehouse monitoring, due to the complex deployment environment and the dense deployment of sensing devices, the poor signal quality and the density and real-time performance of sensing devices affect the reliability of the monitoring network. The long-distance wireless transmission technology based on spread spectrum technology has a long transmission distance, supports independent networking, excellent expansion performance, large node capacity, and can be connected to a large number of sensors. It has a long battery life and low communication cost, and can be used as a hazardous chemical warehouse. Perception monitoring terminal network access technology in monitoring scenarios.

However, the traditional networking of long-distance wireless transmission technology based on spread spectrum technology uses a star topology, which has many shortcomings. , due to the bad communication conditions, it is impossible to directly communicate with the gateway. At present, two solutions are generally adopted. One requires the deployment of multiple gateways to cover communication blind areas. Because the deployment of gateways requires the configuration of power supplies and remote communication channels, especially in dangerous In the scenario of chemical warehouse monitoring, the deployment environment is limited, which makes the deployment cost high. Another way is to use the node relay method, and use the relay node to transmit the information of the sensing devices in the area that the gateway cannot cover through the relay mode. However, since the energy of sensing nodes is generally limited, this method will lead to rapid energy consumption of relay nodes, thereby reducing the service life of the entire monitoring network.

Contents of the invention

The technical problem to be solved by the present invention is to provide an energy sensing-based sensor network relay transmission method and device, which can ensure the lowest power consumption of sensing nodes in the entire network.

The technical solution adopted by the present invention to solve the technical problem is to provide a sensor network relay transmission method based on energy perception, including the following steps:

Initialization phase:

After the relay node is powered on, it sends the node identity information to the gateway node, and verifies and confirms the relevant identity;

If the identity confirmation information of the gateway is received, read the initialization information fed back by the gateway, and configure parameters according to its own energy information;

Relay transfer phase:

Judging whether the window time for early wake-up has arrived, if it arrives, start listening to the data sent by the sensing node, if not, continue to wait;

Receive the relevant data sent by the sensing node, extract the identity information and related load information of the sensing node, and store it in the relay transmission data queue;

After the receiving window time is up, according to the number of forwarding sensing nodes and the black and white list system, combine the data of the sensing nodes with its own sensing data, mark its own energy parameters, and generate corresponding data packets for sending;

The node identity information includes node number, node type and number of forwarding aware nodes.

The initialization information includes a blacklist and a blacklist and a time window.

According to the number of forwarding sensing nodes and the black and white list system, the data of the sensing nodes is combined with its own sensing data, and its own energy parameters are marked, and the corresponding data packets are generated and sent as follows:

Obtain its own energy information and sensor data;

Establish a relay transmission information judgment model according to the parameter configuration, select the identity information of the sensing node for relay transmission through the black and white list system and the number of forwarding sensing nodes, and use the sensing node identity information to obtain its corresponding information from the relay transmission data queue. load information;

Combine its own energy information and sensing data, node working mode and relay load information into sending data and send data.

The energy-aware-based sensor network relay transmission method also includes a gateway optimization feedback stage:

After the gateway receives all the sensing data packets, it deduplicates the data packets, ranks the sensing nodes that receive duplicates, receives the signal strength information of the relay node according to the energy information of the relay node in the data packet, and optimizes its transmission path And pass the black and white list, and generate gateway optimization feedback information to send to the relay node;

The relay node receives the gateway optimization feedback information, extracts its own related configuration information, and modifies the parameter configuration of the corresponding relay node; if there is a sensor node responsible for sending information, it will cache the information and wait for the next time the corresponding sensor node information is received Issued.

In the initialization phase, if the identity confirmation information of the gateway is not received, the relay node is set as a sensing node; in the relay transmission phase, the sensing node sends sensing data in a sensing node mode.

In the gateway optimization feedback phase, the sensing node waits for the received feedback information from the device.

The technical solution adopted by the present invention to solve the technical problem is: a sensor network relay transmission device based on energy perception is also provided, including a wireless receiving module, a relay node configuration module, a sensing node recording module, and a relay transmission control module , energy perception module, sensor perception module, relay transmission business module and wireless transmission module;

The wireless receiving module is used to receive the air interface data sent by all nodes in the receiving window, and push the data sent by the gateway to the relay node configuration module according to the identity of the sender, and push the relevant data sent by the sensing node to the sensing node recording module;

The sensing node recording module is used to extract the identity information and related load information of the sensing node, and store them in the relay transmission data queue;

The relay node configuration module is used to extract configuration information related to the relay node, and modify the corresponding relay node configuration information table;

The relay transmission control module is configured to control the working window of the wireless receiving module, the configuration parameters of the relay transmission service module, and the transmission of the wireless sending module according to the relevant information in the relay node configuration information table. instruction;

The energy sensing module is configured to collect energy information of relay nodes, provide it to the relay transmission service module, and modify the corresponding relay node configuration information table;

The sensing perception module is used to collect the sensing data of related sensors configured by the relay node, and provide it to the relay transmission service module;

The relay transmission service module is used to form the sensing node information to be sent through various parameters configured by the relay transmission control module, and transfer the sensing node information and relay node energy information to be transmitted to the relay node Its own perception data information is packaged into a sending data packet and pushed to the wireless sending module;

The wireless sending module is used to send the data packet in the window developed by the relay transmission control module.

Beneficial effect

Due to the adoption of the above-mentioned technical solution, the present invention has the following advantages and positive effects compared with the prior art: in the initialization phase, when the relay identity cannot meet the conditions, the present invention directly degenerates into a standard sensing node. It is simple and does not need to specifically define relay nodes; in the working stage, it controls the relay load according to its own energy conditions, and uses the network's assisted scheduling capability to adjust and optimize the transmission path of the entire network to ensure high availability of the network. This method does not need to change the deployment method of the original monitoring network. It only needs to replace some traditional sensing nodes with relay sensing node devices in the network, and upgrade the application software module of the gateway to complete the upgrade of the sensing network, which has high implementability. sex.

Description of drawings

Fig. 1 is the flowchart of the first embodiment of the present invention;

Fig. 2 is a block diagram of a second embodiment of the present invention.

detailed description

Below in conjunction with specific embodiment, further illustrate the present invention. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

The first embodiment of the present invention relates to a sensor network relay transmission method based on energy perception, which includes three key stages, the first is the sensor node mode initialization stage, which can be based on the sensor node type, deployment location and other information , endow some sensing nodes with a relay mode. Nodes with this mode need to be powered on and transmit their relevant identity information (node number, node type, number of forwarding sensing nodes) to the gateway. The gateway records these information and feeds back relevant initialization information (black list, white list, time window, etc.), after the node receives relevant information, it enters the relay mode, and if it does not receive the correct feedback from the gateway, it directly enters the perception mode. The second is the relay transmission stage. A sensing node with a relay transmission mode will wake up a time window in advance before it needs to transmit its own sensing information, receive the sensing data sent by the sensing mode node, and based on its own number of forwarding sensing nodes And the black and white list system, combine the data of the sensing mode node with its own sensing data, and mark its own energy parameters, generate corresponding data packets to send, and modify the next relevant relay configuration parameters according to its own energy parameters ( time window parameters and the number of forwarding sensing nodes). The last is the gateway optimization feedback stage. After receiving all the sensing data packets, the gateway deduplicates the data packets, ranks the sensing nodes that receive duplicates, and receives the signal strength information of the node according to the energy information of the relay node in the data packet. , optimize its transmission path, and control the communication and transmission of the sensing nodes in the relay mode through information such as blacklist and white list, so as to ensure the lowest power consumption of the sensing nodes in the entire network. As shown in Figure 1, it specifically includes the following steps:

(a) After the relay node is powered on, it needs to send node identity information to the gateway node to verify and confirm the relevant identity;

(b) Receive the identity confirmation information of the gateway. If the confirmation information of the gateway is not received or the confirmation negative information is received, set the relay node to the normal sensing node mode and jump to step (i). identity confirmation information, then proceed to step (c);

(c) Read the identity confirmation information fed back by the gateway, and configure initialization parameters according to its own energy perception information, such as configuring the time of the receiving window, the amount of sensing data that can be relayed, etc.;

(d) Before acquiring the sensor data, judge whether the window time for early wake-up is reached. If the time for early wake-up is reached, turn on the wireless receiving module and start monitoring the data sent by the sensing node. If the corresponding window time is not reached, then continue waiting;

(e) Receive the relevant data sent by the sensing node, extract the identity information and related load information of the sensing node, and store it in the relay transmission data queue;

(f) After the receiving window time is up, obtain the energy information of the relay device and its own sensing data;

(g) Establish a relay transmission information judgment model based on the configuration information of the initialization parameters, select the node identity information for relay transmission through the black and white list system and the quantity information of the sensing data that can be carried by the relay, and use the node identity information to transmit data from the relay Get its corresponding load information in the queue;

(h) The energy information of the relay device, its own sensing data, node working mode and relay load information are combined into sending data, and the data is sent;

(i) Send sensing data in the sensing node mode;

(j) Receive the feedback information from the gateway, extract the configuration information related to this node, and modify the corresponding relay node configuration information table;

The receiving feedback information of the step (j) also includes the following two situations:

(j1) As a relay mode working node, receive the feedback information from the gateway, extract the configuration information related to this node, modify the corresponding relay node configuration information table, and if there is a responsible sensing node to send information, perform information caching, etc. Issue after receiving the information of the corresponding sensing node once;

(j2) As a sensing node mode, it waits for the received feedback information from the device.

The second embodiment of the present invention relates to a sensor network relay transmission device based on energy perception, including a wireless receiving module, a relay node configuration module, a sensing node recording module, a relay transmission control module, an energy sensing module, a sensor A perception module, a relay transmission service module and a wireless sending module.

The wireless receiving module is used to receive the air interface data sent by all nodes in the receiving window, and push the data sent by the gateway to the relay node configuration module according to the identity of the sender, and push the relevant data sent by the sensing node to the sensing node recording module;

The sensing node recording module is used to extract the identity information and related load information of the sensing node, and store them in the relay transmission data queue;

The relay node configuration module is used to extract configuration information related to the relay node, and modify the corresponding relay node configuration information table;

The relay transmission control module is configured to control the working window of the wireless receiving module, the configuration parameters of the relay transmission service module, and the transmission of the wireless sending module according to the relevant information in the relay node configuration information table. instruction;

The energy sensing module is configured to collect energy information of relay nodes, provide it to the relay transmission service module, and modify the corresponding relay node configuration information table;

The sensing perception module is used to collect the sensing data of related sensors configured by the relay node, and provide it to the relay transmission service module;

The relay transmission service module is used to form the sensing node information to be sent through various parameters configured by the relay transmission control module, and transfer the sensing node information and relay node energy information to be transmitted to the relay node Its own perception data information is packaged into a sending data packet and pushed to the wireless sending module;

The wireless sending module is used to send the data packet in the window developed by the relay transmission control module.

The following takes a specific hazardous chemical warehouse monitoring network as an example for further explanation.

In network deployment, where the distance from the gateway is relatively close, or where the energy conditions are good, the energy-aware-based relay device of the second embodiment is used instead of a common sensing node. After the relay device is deployed, the following steps are performed: Steps to activate the repeater mode.

(a) After the device is powered on, it communicates with the gateway for identity authentication;

(b) If the authentication fails, it degenerates into an ordinary sensing node, which is responsible for uploading its own sensing data;

(c) The authenticated node enters the relay mode and performs initialization configuration through the initialization information given by the gateway;

(d) The gateway maintains the relevant information of the nodes in the relay mode.

During data transfer, the network follows the following steps:

(a) The relay node opens a wireless communication receiving window before the moment when its own sensing data is sent, receives all the data of the sensing nodes it can monitor, and stores the information of the sensing nodes and their load in the queue, The relay node decides the length of time to open the window according to its own energy condition;

(b) The relay node determines the number of relay loads according to its own energy conditions, such as relaying two sensing nodes, and then selects the relay sensing node according to the information of the sensing nodes, combined with configuration conditions such as black and white lists;

(c) Pack and send the load of the sensing node of the relay, its own energy situation, and its own sensing data to the gateway;

(d) Waiting for the confirmation information from the gateway, extracting relevant configuration information, and performing parameter optimization. The received information is divided into two parts, one part is its own network optimization parameters, and the other part is the lower command of its own relay sensing node;

(e) The relay node will maintain a feedback information queue of its relayed sensing node, and will give feedback when receiving the data packet of the sensing node; if there is no downlink command, it will generally feed back a standard ACK signal, if there is a downlink command This is for command feedback, and the downlink command of the gateway is generally sent to the sensing node in the second sending and receiving cycle.

It is not difficult to find that the present invention utilizes the long-distance wireless transmission technology based on spread spectrum technology for long transmission distance, the characteristics of high density of sensing nodes deployed in the dangerous chemical warehouse monitoring scene, and many selectable relay nodes. Through the authentication with the gateway, obtain the relay identity, and build the entire monitoring network under the configuration of the gateway. In the working stage, relay load control is performed according to its own energy conditions, and the transmission path adjustment and optimization of the entire network is adjusted and optimized by using the network's assisted scheduling capability to ensure high availability of the network. This method does not need to change the deployment method of the original monitoring network. It only needs to replace some traditional sensing nodes with relay sensing node devices in the network, and upgrade the application software module of the gateway to complete the upgrade of the sensing network, which has high implementability. sex.

Claims (8)

1. A relay transmission method of a sensor network based on energy perception is characterized by comprising the following steps:

an initialization stage:

after the relay node is electrified, node identity information is sent to the gateway node, and verification and confirmation of related identities are carried out;

if the identity confirmation information of the gateway is received, reading the initialization information fed back by the gateway, and configuring parameters according to the energy information of the gateway;

and a relay transmission stage:

judging whether the window time of early awakening is reached, if so, starting to monitor data sent by the sensing node, and if not, continuing to wait;

receiving related data sent by a sensing node, extracting identity information and related load information of the sensing node, and storing the identity information and the related load information into a relay transmission data queue;

and after the time of the receiving window is up, combining the data of the sensing nodes with the sensing data of the sensing nodes according to the number of the forwarding sensing nodes and a black-and-white list system of the sensing nodes, marking the energy parameters of the sensing nodes, and generating and sending a corresponding data packet.

2. The energy perception-based relay transmission method for the sensor network according to claim 1, wherein the node identity information includes a node number, a node type and the number of forwarding perception nodes.

3. The energy perception-based sensor network relay transmission method according to claim 1, wherein the initialization information includes a black and white list and a time window.

4. The energy-aware-based sensor network relay transmission method according to claim 1, wherein the method for combining the data of the sensor node with the sensor data of the sensor node according to the number of the sensor node forwarding itself and a black-and-white list system, marking the energy parameter of the sensor node, generating a corresponding data packet, and sending the data packet specifically comprises:

acquiring self energy information and sensing data;

establishing a relay transmission information judgment model according to the parameter configuration, selecting the identity information of the sensing nodes of relay transmission through a black and white list system and the number of the forwarding sensing nodes, and acquiring corresponding load information from a relay transmission data queue by using the identity information of the sensing nodes;

and forming the self energy information and the sensing data, the node working mode and the relay load information into sending data for data sending.

5. The energy-aware-based sensor network relay transmission method of claim 1, further comprising a gateway optimization feedback stage:

after receiving all the sensing data packets, the gateway performs data packet deduplication, ranks the sensing nodes receiving the duplicate sensing data packets, receives the signal strength information of the relay node according to the energy information of the relay node in the data packet, optimizes the transmission path and passes through a black and white list, generates gateway optimization feedback information and sends the gateway optimization feedback information to the relay node;

the relay node receives the gateway optimization feedback information, extracts self-related configuration information, and modifies the parameter configuration of the corresponding relay node; if the sensing node in charge of the sensing node sends the information, the information is cached and sent after the information of the corresponding sensing node is received next time.

6. The energy perception-based sensor network relay transmission method according to claim 5, wherein in the initialization stage, if identity confirmation information of a gateway is not received, the relay node is set as a perception node; and in the relay transmission stage, the sensing node sends sensing data in a sensing node mode.

7. The energy-aware-based sensor network relay transmission method of claim 6, wherein during the gateway optimization feedback phase, the sensor node waits for the received feedback information given by the device.

8. A sensor network relay transmission device based on energy perception is characterized by comprising a wireless receiving module, a relay node configuration module, a perception node recording module, a relay transmission control module, an energy perception module, a sensing perception module, a relay transmission service module and a wireless sending module;

the wireless receiving module is used for receiving air interface data sent by all nodes at a receiving window, pushing the data sent by the gateway to the relay node configuration module according to different identities of senders, and pushing related data sent by the sensing node to the sensing node recording module;

the sensing node recording module is used for extracting the identity information and the related load information of the sensing node and storing the identity information and the related load information into a relay transmission data queue;

the relay node configuration module is used for extracting configuration information related to the relay node and modifying a corresponding relay node configuration information table;

the relay transmission control module is used for controlling a working window of the wireless receiving module, configuration parameters of the relay transmission service module and a sending instruction of the wireless sending module according to relevant information in the relay node configuration information table;

the energy perception module is used for collecting energy information of the relay node, providing the energy information to the relay transmission service module and modifying a corresponding relay node configuration information table;

the sensing module is used for collecting sensing data of relevant sensors configured in the relay node and providing the sensing data to the relay transmission service module;

the relay transmission service module is used for forming sensing node information to be transmitted according to various parameters configured by the relay transmission control module, packaging the sensing node information to be transmitted, the relay node energy information and the sensing data information of the relay node to form a transmission data packet, and pushing the transmission data packet to the wireless transmission module;

and the wireless sending module is used for sending out the data packet in the window developed by the relay transmission control module.

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