CN102036369A - Method and relevant equipment for determining position information of sensor network node - Google Patents
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Abstract
The invention discloses a method and relevant equipment for determining the position information of a sensor network node in order to solve the problems of complicated operations and high implementation difficulty in the prior art. The method comprises the following steps: obtaining the position information of a base station corresponding to the sensor network node after receiving the detection data sent by the sensor network node; and using the obtained position information of the base station as the position information of the sensor network node.
Description
Technical Field
The present invention relates to the field of wireless sensor networks and communication technologies, and in particular, to a method and an apparatus for determining location information of a sensor network node.
Background
With the rapid development of Micro-electronics technology and Micro-Electro-Mechanical systems (MEMS) technology in recent years, it has become possible to design, manufacture, and apply low-power sensors having sensing functions and wireless communication functions. Sensor-based wireless sensor networks have also emerged. It is expected that the wireless sensor network has wide application prospects in the fields of medical treatment, public safety, military affairs, scheduled monitoring and the like. Information of interest can be collected whenever a wireless sensor is deployed near a location where an event is likely to occur.
In a wireless sensor network, three types of sensor network nodes, i.e., a sensor node, a cluster head node, and a sink node, are generally included, where: the Sensor Node is provided with various types of sensors and is used for detecting peripheral preset parameters, wherein the preset parameters comprise environmental parameters such as temperature, humidity and specific gas molecule concentration and other parameters such as the number of vacant parking spaces; the Cluster Head nodes (CH, Cluster Head) are used as collecting nodes of local area data and used for collecting detection data obtained by sensor nodes in a Cluster (namely the sensor nodes in a preset area and associated with the Cluster Head nodes) and sending the collected detection data to the sink nodes or an accessed Ethernet or a mobile communication network, the Cluster Head nodes can also perform fusion processing on the data before sending the collected detection data to the sink nodes or the accessed network, and the Cluster Head nodes can send the detection data to the sink nodes and the accessed network in a multi-hop mode; the aggregation node is used for collecting detection data sent by the sensor nodes or the cluster head nodes in an area with dense cluster head nodes, and sending the detection data to the application server through the accessed Ethernet or the mobile communication network. The Sink nodes may be classified into Fixed Sink Nodes (FSN) and Mobile Sink Nodes (MSN). The cluster head node and the sink node belong to a relay node.
Obviously, in a wireless sensor network, it is crucial to detect the location information of data, in other words, the location information of the sensor node that detected the detected data, which is meaningless if there is no location information or no relatively accurate location information. For example, for fire alarm, if a monitoring person only knows that a fire has occurred from the application server, but cannot know the location information of the fire, for example, it is meaningless to know that a fire has occurred in the city, but not that a fire has occurred near the street, the cell, or the building, then timely and effective measures for dealing with the fire cannot be taken.
In the existing solution, the position information of the sensor node is determined in the following manner:
firstly, when a sensor node is deployed, position information is preset in the sensor node, and when detection data occur in subsequent sensor nodes, the preset position information is carried in the detection data and is sent to a cluster head node or a sink node;
secondly, a Global Positioning System (GPS) receiver or other Positioning devices are installed in the sensor nodes, so that the sensor nodes can acquire their own position information, and the subsequent sensor nodes carry the preset position information in the detection data when sending the detection data and send the detection data to the cluster head node or the sink node.
For the first method, since the number of the sensor nodes is large, it is complicated to preset the location information in each sensor node, and it is not favorable for the sensor nodes to be reused, because the location information needs to be reset when one sensor node needs to be redeployed to another area;
for the second method, because the GPS receiver or other positioning devices need a large amount of energy supply when operating, and because the sensor nodes are often deployed in remote locations or in special locations where people are not easy to reach, the operations required for frequently replacing power supply devices such as batteries providing energy are extremely complicated, so the feasibility is not high, and in addition, the volume of the sensor nodes is usually small, and the installation of the positioning devices such as the GPS receiver in the sensor nodes increases the volume of the sensor nodes, which makes the implementation difficult and increases the cost.
Disclosure of Invention
The embodiment of the invention provides a method for determining position information of a sensor network node, which is used for solving the problems of complex operation and high implementation difficulty in the prior art.
Correspondingly, the embodiment of the invention also provides a device for determining the position information of the sensor network node.
The technical scheme provided by the embodiment of the invention is as follows:
a method of determining sensor network node location information comprising:
after receiving detection data sent by a sensor network node, acquiring position information of a base station corresponding to the sensor network node; and are
And taking the acquired position information of the base station as the position information of the sensor network node.
An apparatus for determining sensor network node location information, comprising:
the receiving unit is used for receiving detection data sent by the sensor network node;
the acquisition unit is used for acquiring the position information of the base station corresponding to the sensor network node after the receiving unit receives the detection data sent by the sensor network node;
and the determining unit is used for taking the position information of the base station acquired by the acquiring unit as the position information of the sensor network node.
According to the embodiment of the invention, after the base station receives the detection data sent by the sensor network node, the self position information is determined, and the determined self position information of the base station is used as the position information of the sensor network node sending the detection data. The positioning function of the existing mobile communication network is utilized to determine the position information of various nodes in the wireless sensor network, and the position information does not need to be arranged in the sensor network nodes in advance or a positioning device does not need to be installed, so that the problems of complex operation and poor feasibility in determining the position information of the sensor network nodes in the prior art are solved, and a feasible scheme for determining the position information of the sensor network nodes is provided.
Drawings
FIG. 1 is a flow chart of the main implementation principle of the embodiment of the present invention;
FIG. 2 is a flow chart of a process for determining location information of a sensor network node according to an embodiment of the present invention;
FIG. 3 is a flow chart for determining base station location information using location based services;
fig. 4 is a schematic structural diagram of an apparatus for determining location information of a sensor network node according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of another apparatus for determining location information of a sensor network node according to an embodiment of the present invention.
Detailed Description
The existing scheme for determining the position information of the sensor node has the problem of complex operation. Considering that the mobile communication network including the 2G network such as GSM, IS-95, etc. and the 3G network such as TD-SCDMA, WCDMA, CDMA2000, WiMAX, etc. has the advantages of perfect infrastructure and wide coverage, the embodiment of the present invention provides a scheme for determining the location information of the sensor node by using the mobile communication network.
In the existing mobile communication network, Location Based Service (LBS) has become a common and important Service. The location-based service may provide the user with information about the current location of the user via a location function entity in the mobile communication network, for example, an electronic navigation service belongs to the location-based service.
The deployment density of base stations or other access devices in the existing mobile communication network can reach that one base station is arranged every 100-200 meters apart, and for many demands, the positioning error of 100-200 meters can be completely accepted, for example, the difference between two places with the difference of 100-200 meters in humidity, the density of special gas molecules reflecting the preset pollution degree and the like can be ignored.
Based on the above thought, the embodiment of the present invention provides that the relay node sends the collected detection data detected by the sensor node to the corresponding base station, and the base station further determines the location information of itself after receiving the detection data, and then uses the location information of the base station as the location information of the corresponding sensor node, thereby providing a scheme for simply and feasibly determining the location information of the sensor node.
The main implementation principle, the specific implementation mode and the corresponding beneficial effects of the technical scheme of the embodiment of the invention are explained in detail with reference to the drawings.
As shown in fig. 1, the main implementation principle flow of the embodiment of the present invention is as follows:
and step 30, using the position information determined in the step 20 as the position information of the sensor network node.
Two embodiments will be described in detail below to illustrate and explain the main implementation principles of the method of the present invention, based on the above inventive principles of the present invention.
Example one
Fig. 2 is a flowchart of a process for determining location information of a sensor network node according to an embodiment of the present invention.
Step 21, the relay node receives detection data sent by the sensor node, specifically including that the cluster head node receives detection data sent by the sensor node in the cluster, or the sink node receives detection data sent by the cluster head node, where the detection data is detected by the sensor node. The sensor node can be set to report the detected detection preset parameters to the cluster head node periodically; or reporting the detected detection data according to an indication of the cluster head node, for example, the cluster head node sends a CH _ HELLO message to a sensor node in the cluster, and the sensor node sends the detected detection data to the cluster head node after receiving the CH _ HELLO message;
step 22, the relay node sends the detection data sent by the sensor node to a corresponding base station, where the corresponding base station may be an access base station of the relay node, where the access base station refers to a base station serving the relay node and having the best communication quality according to the communication quality of each base station, and in this case, the sensor node is reset at another location without any manual parameter resetting operation; the corresponding base station can also be a base station corresponding to a sensor network node which is manually specified in advance, and in this case, when the relay node and the corresponding base station do not establish a communication link, the detection data can be sent to the corresponding base station in a multi-hop mode, namely, in a forwarding mode of other relay nodes;
the method comprises the steps that the corresponding relation between a sensor network node and a base station in a mobile network is specified in advance, the setting method can be that a configurator manually sets the base station corresponding to each sensor network node and stores the corresponding relation in the sensor network node, for example, (1) the base station identification of the base station corresponding to the sensor node is stored in the sensor node, a subsequent sensor node includes the corresponding base station identification in detected detection data and sends the corresponding base station identification to a relay node such as a cluster head node, and the relay node sends the corresponding base station identification to the base station represented by the base station identification in a multi-hop mode according to the base station identification included in the detection data; or (2) the corresponding relation between each sensor node in the cluster and the base station is stored in the cluster head node, and after subsequently receiving the detection data sent by the sensor nodes, the base station corresponding to the sensor node sending the detection data is searched, and the received detection data is sent to the searched corresponding base station; or (3) storing the base station identifier corresponding to the cluster head node in the cluster head node, and after receiving the detection data sent by the sensor node in the cluster, sending the received detection data to the base station represented by the base station identifier corresponding to the cluster head node; other ways of setting up and saving the correspondence between the sensor network nodes and the base stations in the mobile network are not described in detail here.
Please refer to table 1, which shows the corresponding relationship between the base station and the sensor node
| Base station identification | Sensor node identification |
| BNO.1 | SN1、SN2、SN3 |
| BNO.2 | SN4、SN5 |
The advantage of manually designating the base station corresponding to the sensor node is that in some cases, the base station with the best communication quality is not the node closest to the sensor network node in geographic distance, so that the position information of the sensor network node can be more accurately determined in the subsequent process.
Step 23, after receiving the detection data sent by the relay nodes including the cluster head node, the base station determines the position information of the base station itself;
step 24, the base station uses the position information of the base station determined in step 23 as the position information of the sensor node which detects the detection data, and the process goes to step 25;
step 25, the base station analyzes the detection data received in step 22 based on the protocol format for communication with the wireless sensor network, writes the position information of the sensor node determined in step 24 into a field for recording the position information in the detection data, and adds the position information to the detection data;
and step 26, the base station sends the detection data with the position information added in the step 25 to an application server needing the detection data detected by the sensor through a mobile communication network or a core network connected with the mobile communication network, so that monitoring personnel can perform subsequent analysis processing.
In step 24, the base station may use its own location information as the location information of the relay node including the cluster head node that transmits or forwards the detection data.
The above steps 21 to 24 may achieve the purpose of determining the sensor network node location information.
In step 23, after receiving the detection data sent by the relay node including the cluster head node, the base station may further determine whether to add the position information to the detection data, where the specific determination method is as follows:
in order to avoid determining an excessive load brought by the position information of the sensor network node to the base station, a sensor network node identifier list may be stored in the base station, when the current load of the base station exceeds a certain threshold, the base station determines whether the sensor network node identifier included in the received detection data is in the sensor network node identifier list, if so, the position information of the sensor network node is determined through steps 24 to 26, otherwise, the processing step of determining the sensor network node is not performed; or,
the detection data contains a predetermined mark for indicating whether position information needs to be added in the detection data, and the position information of the sensor network node is determined to be unnecessary for the detection data which is sent by part of the sensor network nodes with positioning functions and contains the position information, so that the sensor network node can set the predetermined mark as the position information which does not need to be added when sending the detection data. The base station determines whether additional location information is needed by reading the predetermined identifier in the received detection data, if so, the location information of the sensor network node is determined through steps 24 to 26, otherwise, the processing step of determining the sensor network node is not performed, so as to reduce the workload of the base station.
In the above step 23, the base station may determine its own location information by:
generally, many base stations have positioning devices such as GPS receivers, and therefore, the base stations can determine their own position information by using their own positioning devices;
the base station may also determine its own location information by using location-based services, please refer to fig. 3:
step 31, a base station initiates an LBS service request to a network access device such as an access gateway, wherein the LBS service request includes a base station identifier of the base station, for example, a Cell identifier (Cell ID) of a coverage area of the base station;
step 32, after receiving the LBS Service request sent by the base station, the network access device such as the access gateway forwards the LBS Service request to a Location application server such as a Location Service Platform (LSP) in the mobile network;
step 33, after receiving the LBS service request sent by the access gateway, the positioning service platform LSP sends a network positioning request to a positioning function entity in the mobile communication network, where the network positioning request includes the base station identifier, such as Cell ID;
step 34, the positioning functional entity in the mobile communication network determines the location information of the base station according to the network positioning request sent by the LSP and according to the base station identifier included in the network positioning request, for example, the location information may be latitude and longitude information, and sends the network positioning response including the determined location information to the positioning service platform LSP;
step 35, the location service platform LSP acquires location information from the received network location response, and sends an LBS service response including the acquired location information to network access devices such as an access gateway corresponding to the base station;
step 36, the access gateway and other network access devices forward the LBS service response containing the location information to the base station sending the corresponding LBS service request.
At present, the existing Location-based service is usually initiated by a user, a mobile network obtains a Cell identifier Cell ID serving the user through a Home Location Register (HLR) of the user or Lh and Lg interfaces defined by 3GPP specifications, and then determines the current Location information of the user by determining the Location information of a base station of the Cell whose coverage is identified by the Cell ID, so that the step of obtaining the Cell ID of the user in the existing Location-based service is omitted in the step of determining the Location information of the base station.
In addition, the LSP also includes a Serving Mobile Location Center (SMLC) unit for storing a correspondence relationship between the Cell ID and Location information (e.g., latitude and longitude information), when the LSP receives the LBS service request sent by the access gateway in step 32, before sending the network location request to the location function entity in the network, it first searches whether it has stored the location information corresponding to the Cell ID contained in the received LBS service request, if it has stored the location information corresponding to the Cell ID contained in the LBS service request, it is not necessary to send the network location request to the location function entity in the network again, that is, step 33 and step 34 do not need to be performed, and the LBS service response including the found location information is sent to the network access device such as the access gateway corresponding to the base station in step 35, so as to reduce the waste of network transmission resources.
The solution for determining location information of a sensor network node provided by the embodiment of the present invention is also applicable to location information of a device which has a communication link with a mobile communication network but does not have a subscriber identity, such as an MSISDN.
According to the embodiment of the invention, after the base station receives the detection data sent by the sensor network node, the self position information is determined, and the determined self position information of the base station is used as the position information of the sensor network node sending the detection data. According to the scheme for determining the position information of the sensor network node, the position information does not need to be manually configured in the sensor node, so that the processing complexity is reduced; in addition, positioning devices such as a GPS receiver and the like do not need to be added in the sensor node, the size of the sensor node is not increased, extra cost is not increased, power supply equipment of the sensor node does not need to be replaced frequently, and the sensor node is suitable for the situation of repeated use of the sensor node.
Example two
In the first embodiment, the base station or the mobile communication network access equipment determines the position information of the received detection data and adds the position information to the detection data. The present embodiment provides a scheme in which the relay node determines the location information of the received detection data and adds the location information to the detection data.
After receiving detection data sent by other sensor network nodes, a relay node including a cluster head node and a sink node determines a base station corresponding to the sensor network node sending the detection data, and the specific determination mode can be as follows:
the relay node selects a base station identifier corresponding to the identifier of the sensor network node included in the received detection data from the corresponding relationship between the pre-stored sensor network node and the base station identifier according to the identifier of the sensor network node included in the received detection data, and takes the base station corresponding to the selected base station identifier as the base station corresponding to the sensor network node which sends the detection data, wherein the corresponding relationship between the pre-stored sensor network node and the base station identifier is similar to the description in the step 22 in the first embodiment, and detailed description is omitted here;
or, the relay node takes the base station with the best communication quality provided at the position of the relay node as the base station corresponding to the sensor network node which determines to send the detection data.
After the relay node determines the base station corresponding to the sensor network node which sends the detection data, the position information of the determined base station is obtained, and the specific way of obtaining the position information of the base station is as follows:
the relay node sends a positioning service request to the determined base station, and obtains the location information of the base station included in the positioning service response from the positioning service response fed back by the base station, where the location information included in the positioning service response fed back by the base station is the location information of the base station determined according to the scheme similar to step 23 in the first embodiment after the base station receives the positioning service request sent by the relay node.
And after the relay node acquires the position information of the base station from the positioning service response fed back by the base station, taking the acquired position information as the position information of the sensor network node which sends the detection data.
Preferably, after the relay node determines the location information of the sensor network node that transmits the detection data, the relay node may further add the determined location information of the sensor network node to the detection data, and transmit the detection data to which the location information is added to the application server that needs to detect the data.
Correspondingly, an embodiment of the present invention further provides an apparatus for determining location information of a sensor network node, as shown in fig. 4, the apparatus includes a receiving unit 401, an obtaining unit 402, and a determining unit 403, and the specific details are as follows:
a receiving unit 401, configured to receive detection data sent by a sensor network node;
an obtaining unit 402, configured to obtain, after the receiving unit 401 receives the detection data, location information of a base station corresponding to the sensor network node;
a determining unit 403, configured to use the location information of the base station determined by the obtaining unit 402 as the location information of the sensor network node that transmits the detection data.
Preferably, the apparatus of fig. 4 further comprises an additional unit 404 and a transmitting unit 405, wherein
An attaching unit 404 for attaching the position information determined by the determining unit 403 to the detection data received by the receiving unit 401;
a sending unit 405, configured to send the detection data to which the location information is attached to an application server that needs the detection data.
When the device for determining the location information of the sensor network node is a base station corresponding to the sensor network node, an obtaining unit 402 in the device is configured to obtain location information of the device;
preferably, referring to fig. 5, when the apparatus for determining location information of a sensor network node in fig. 4 is a base station corresponding to the sensor network node, the apparatus further includes a determining unit 501, configured to determine whether to add location information to the received detection data after the receiving unit 401 receives the detection data;
when the determination unit 501 determines that position information needs to be added to the received detection data, the acquisition unit 402 and the determination unit 403 each perform corresponding processing, and when the determination unit 501 determines that position information does not need to be added to the received detection data, the acquisition unit 402, the determination unit 403, and the addition unit 404 may directly transmit the detection data received by the reception unit 401 to an application server that needs the detection data without performing the corresponding processing.
Similar to the base station, the above-mentioned device for determining the location information of the sensor network node may be other mobile communication network access devices.
When the above device for determining the location information of the sensor network node is a relay node, the obtaining unit 402 in the device is configured to send a positioning request to a base station corresponding to the sensor network node, and obtain the location information from a corresponding positioning response.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (14)
1. A method of determining sensor network node location information, comprising:
after receiving detection data sent by a sensor network node, acquiring position information of a base station corresponding to the sensor network node; and are
And taking the acquired position information of the base station as the position information of the sensor network node.
2. The method of claim 1, wherein the base station is the base station with the best communication quality at the location of the sensor network node, or
The base station is a corresponding access base station of the pre-designated sensor network node.
3. The method of claim 1, wherein after taking the obtained location information of the base station as the location information of the sensor network node, further comprising:
appending location information of the sensor network node to the received detection data, an
And sending the detection data with the position information to an application server needing the detection data.
4. The method according to any one of claims 1 to 3, wherein the base station corresponding to the sensor network node is a base station transmitting the detection data;
after receiving the detection data sent by the sensor network node, the acquiring the location information of the base station corresponding to the sensor network node includes:
and the base station for transmitting the detection data acquires the position information of the base station after receiving the detection data sent by the sensor network node.
5. The method of claim 4, wherein the base station transmitting the detection data determines its own location information when determining that it is necessary to add location information to the received detection data after receiving the detection data transmitted from the sensor network node.
6. The method of claim 5, wherein the base station transmitting the detection data determines whether position information needs to be added to the received detection data, and specifically comprises:
the base station transmitting the detection data acquires the sensor network node identification contained in the received detection data, an
And determining whether the position information should be added to the received detection data according to the acquired sensor network node identification and information which is stored in advance and whether the position information is required to be added to the detection data sent by the sensor network node corresponding to each sensor network node identification.
7. The method of claim 5, wherein the base station transmitting the detection data determines whether position information needs to be added to the received detection data, and specifically comprises:
the base station for transmitting the detection data judges whether the received detection data contains a preset identifier; and are
Determining that position information needs to be added to the received detection data when the predetermined identification is included in the received detection data, an
When the predetermined identifier is not included in the received detection data, it is determined that the position information does not need to be added to the received detection data.
8. The method of claim 4, wherein the base station transmitting the detection data obtains its own location information, and specifically comprises:
the base station transmitting the detection data sends a positioning service request to a positioning service server through an access gateway, wherein the positioning service request carries a base station identifier of the base station; and
receiving a corresponding positioning service response which is sent by a positioning service server through an access gateway and contains position information, wherein the position information contained in the positioning service response is obtained from a positioning function entity by the positioning service server according to a base station identifier contained in the positioning service request;
and the base station transmitting the detection data acquires the position information from the received positioning service response.
9. The method of claim 4, wherein the base station transmitting the detection data obtains its own location information, and specifically comprises:
the base station transmitting the detection data sends a positioning service request to a positioning service server through an access gateway, wherein the positioning service request comprises a base station identifier of the base station, and
receiving a positioning service response which is sent by the positioning service server through an access gateway and contains position information, wherein the position information contained in the positioning service response is the position information which is searched by the positioning service server from the corresponding relation between the base station identification stored in the positioning service server and the position information according to the base station identification contained in the positioning service request;
and the base station transmitting the detection data acquires the position information from the received positioning service response.
10. The method of claim 4, wherein the base station transmitting the detection data determines its location information using its own installed positioning device.
11. The method according to any one of claims 1 to 3, wherein after receiving the detection data sent by the sensor network node, the relay node acquires the location information of the base station corresponding to the sensor network node.
12. The method of claim 11, wherein the step of the relay node acquiring the location information of the base station corresponding to the sensor network node specifically comprises:
the relay node sends a positioning service request to a base station corresponding to the sensor network node, an
And acquiring position information from the corresponding positioning service response sent by the base station, wherein the position information is determined by a positioning process initiated to a positioning service server based on a base station identifier of the base station or determined by the base station by utilizing a positioning device installed on the base station.
13. An apparatus for determining sensor network node location information, comprising:
the receiving unit is used for receiving detection data sent by the sensor network node;
the acquisition unit is used for acquiring the position information of the base station corresponding to the sensor network node after the receiving unit receives the detection data sent by the sensor network node;
and the determining unit is used for taking the position information of the base station acquired by the acquiring unit as the position information of the sensor network node.
14. The apparatus of claim 13, further comprising:
an attaching unit configured to attach location information of the sensor network node to the received detection data;
and a sending unit, configured to send the detection data to which the location information has been added to an application server that needs the detection data.
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| CN107579887A (en) * | 2017-09-13 | 2018-01-12 | 深圳市鑫汇达机械设计有限公司 | A kind of intelligent domestic system based on wireless sensor network |
| CN108022401A (en) * | 2017-11-30 | 2018-05-11 | 南京南邮信息产业技术研究院有限公司 | The quick distribution method of perimeter defense system and system based on wireless senser |
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2009
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| CN103139903A (en) * | 2011-11-28 | 2013-06-05 | 无锡物联网产业研究院 | Internet of Things locating information processing method, system and associated devices |
| CN103139903B (en) * | 2011-11-28 | 2015-08-12 | 无锡物联网产业研究院 | A kind of Internet of Things method, system and relevant device |
| CN105052073A (en) * | 2013-01-10 | 2015-11-11 | 英特尔公司 | Aggregating and processing distributed data on ultra-violet (uv) exposure measurement |
| CN107579887A (en) * | 2017-09-13 | 2018-01-12 | 深圳市鑫汇达机械设计有限公司 | A kind of intelligent domestic system based on wireless sensor network |
| CN107579887B (en) * | 2017-09-13 | 2018-10-26 | 北京康智乐思网络科技有限公司 | A kind of intelligent domestic system based on wireless sensor network |
| CN108022401A (en) * | 2017-11-30 | 2018-05-11 | 南京南邮信息产业技术研究院有限公司 | The quick distribution method of perimeter defense system and system based on wireless senser |
| CN108022401B (en) * | 2017-11-30 | 2020-09-15 | 南京南邮信息产业技术研究院有限公司 | Perimeter protection system rapid layout method based on wireless sensor |
| CN113781834A (en) * | 2021-10-29 | 2021-12-10 | 深圳市捷顺科技实业股份有限公司 | Parking space monitoring method, device, equipment and storage medium |
| CN113781834B (en) * | 2021-10-29 | 2023-02-28 | 深圳市捷顺科技实业股份有限公司 | Parking space monitoring method, device, equipment and storage medium |
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Application publication date: 20110427 |