KR101047120B1 - Sensor node simulation system - Google Patents

Abstract

The present invention discloses a sensor node simulation system for modeling and simulating scenarios for environmental changes and events in a space where a sensor node system is installed, and obtaining and analyzing optimized results. To this end, the present invention generates an environment change scenario editing module for modeling a scenario for the environment and the event of the space in which the sensor node system is installed, a simulator for performing a simulation for the scenario, and a result screen for visualizing the simulation result. And providing a user interface on the result screen to receive modifications to the scenario, and including a result analysis module for reanalyzing the simulation result for the modified scenario.

Sensor Node, Router, Space, Simulator, Use Case Diagram

Description

Sensor node simulation system

The present invention relates to a sensor node simulation system for modeling and simulating scenarios for environmental changes and events in a space where a sensor node system is installed, and for obtaining and analyzing optimized results.

The present invention is derived from the research conducted as part of the IT growth engine technology development project of the Ministry of Knowledge Economy and the Ministry of Information and Communication Research and Development. [Task Management No .: 2008-S-023-01, Task Name: Development of Nano Qplus based sensor network simulator] ].

Today, the USN (Ubiquitous Sensor Network) is becoming more diverse and wider in applications, from small home networks to large building management and urban management.

USN places sensor nodes in buildings, roads, and other human-needed areas, and through sensor nodes changes in the environment (eg, temperature, humidity, light intensity, voltage, wind direction, traffic volume, ozone concentration, carbon dioxide concentration). , And other various environmental values to be measured by human beings) and used to change or refer to the environment using the measured values. Therefore, USN is expected to be applied to various fields such as home, logistics, and distribution, transportation, administration, health, welfare, and environment in the future, and will become the infrastructure of future society. In the society where the USN is built, the intelligence environment of all things can autonomously sense the surrounding environment to form an information environment that recognizes the surrounding situation and controls them.

Therefore, as the USN is installed and operated in a wider range, if an error occurs in the USN, a huge cost is required to recover and reinstall the sensor node.

Therefore, operators and managers require accurate prediction results such as estimation, installation, and maintenance, and the solution node is a sensor node simulation system. The sensor node simulation system on the market is currently being applied only to network communication itself, without regard to quotation, installation and maintenance.

Accordingly, an object of the present invention is to provide a sensor node simulation system for modeling and simulating scenarios of environmental changes and events in a space where a sensor node system is installed, and obtaining and analyzing optimized results.

The above object is formed according to the present invention for any one of the environmental change of the space in which the sensor node system is installed, and at least one event and the environmental change for the space and a time interval is assigned to each start and end. An environment change scenario editing module for modeling a scenario being generated; A simulator for performing a simulation for the scenario; And a result analysis module for generating a result screen visualizing the simulation result, providing a user interface on the result screen to reflect modifications to the scenario, and reanalyzing the simulation result with respect to the modified scenario. It is achieved by a sensor node simulation system characterized in that.

The present invention can analyze the problem prior to the actual installation of the sensor network, and can know the location of the node to install based on the analysis results. In addition, the present invention to determine the appropriate number of sensor nodes disposed in the space through the simulation, through which it is possible to know the estimate for the installation cost.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 shows a conceptual diagram of a sensor node simulation system according to an embodiment of the present invention.

The illustrated sensor node simulation system includes an environment change scenario editing module 110, a simulator 120, and a result analysis module 140.

The environment change scenario editing module 110 may model a scenario for a space such as a building, a road, and a target vacant space using a use case diagram. The environment change scenario editing module 110 provides an interface for creating a scenario to be performed in a simulation target space in response to an environmental condition or an event input desired by a developer.

The interface is provided to set which events to perform at which time in the space. The interface provided by the environment change scenario editing module 110 will be described with reference to FIGS. 2 and 3.

2 illustrates an example of an interface using a use case diagram provided by the environment change scenario editing module 110.

The illustrated interface includes a menu 111, a structural window 112, and a display window 113.

The menu 111 includes a scenario generation menu 111a, range setting menus 111b to 111d, and a movement setting menu 111e. The scenario creation menu 111a allows a developer to give events such as fires to a space (eg, a building), or to set various environments that can be varied in humidity, temperature, illumination, and other spaces.

The range setting menus 111b to 111d allow to set a section in which events or environmental changes occur in the space. Range settings can also be set by the developer using input devices such as a mouse or keyboard. An example in which a range is set in the space will be described with reference to FIG. 3.

3 shows an example in which a range is set in a space (building).

As shown, the space (building) has a range set for the area corresponding to the reference "A", the area set (A) is a section in which the developer inquires about the response to environmental changes or events occur Corresponds to One or more of these ranges may be set, and the number is not limited.

In FIG. 2, the range setting menus 111b to 111d divide the range setting menus 111a to 111d into several in order to be able to set a range using a circular or polygonal shape.

Referring to FIG. 2, the range setting menus 111b to 111d include a first range setting menu 111b for setting the range as a circle, a second range menu 111c for specifying the range as a rectangle, and a range as a polygon. The third range setting menu 111d is provided.

In FIG. 2, when the scenario generation menu 111a is selected, various scenarios to be applied to the space (building) are displayed in a layered manner in the structural window 112. Structural window 112 allows floor, time, and range scenarios of a building to be created and edited. The developer may create and edit a desired item through the structure window 112, and input the edit result into the sensor node simulation system.

A separate setting window 113 may be displayed for the item selected by the developer among the items set in the structure window 112. In the figure, the setting window 113 is to create a scenario for the environmental change with the change of time, respectively for the environmental change 1 (temperature / gas), environmental change 2 (illuminance), and environmental change 3 (humidity), respectively You can see the start time and end time set.

The movement setting window 114 indicates a setting for moving a person or an environment variable (eg, temperature, humidity, illuminance, gas, and the like) along the X axis, the Y axis, and the Z axis. Although not shown in the drawing, the movement setting window 114 may also set the movement speed or the repeated movement.

The result display window 115 shows the start and end of the scenario in the form of a diagram. In the result display window 115, the process of the scenario is represented in the form of a diagram so that the user can intuitively identify and edit the scenario.

The simulator 120 simulates the basic communication state and the communication speed of the sensor nodes according to the scenario edited by the environment change scenario editing module 110, and recalculates the number of sensor nodes required in the space and needs the space. Determine the optimal number of sensor nodes, and determine the position of the sensor node for improving the communication speed.

Minimum node

The sensor network that can be configured using the fewest number of nodes is determined within the range of guaranteeing the same sensing result and normal communication as the sensor network configured by the user. This can be done by removing redundant sensors and routers without changing the location of existing sensor nodes.

-Speed up

How many additional routers should be installed in the space to improve the data transfer speed within the range that guarantees the same sensing results and normal communication as the sensor network you configured, and can cover more range when you move the location. Routers determine what they are.

- stability

If additional nodes are installed around the communication load and the retransmission probability or transmission failure rate is higher than the average, it is determined that stability can be improved.

The database 130 stores the simulation result in the simulator 120 in an XML format.

The result analysis module 140 expresses the results of motion control, appearance, shaping for nodes arranged in a space, and packet transmission and reception between nodes in 2D or 3D based on simulation results stored in the database 130. do.

Preferably, the result analysis module 140 is composed of a simulation analysis result visualization module 141, a simulation operation visualization module 142, and a problem analysis module 144.

The simulation motion visualization module 142 visualizes the motion control and the motion of executing the simulation. The simulation analysis result visualization module 141 visualizes intermediate or final result values that are uploaded to the database 130. Simulation analysis result visualization module 141 may provide a result for the number of nodes, energy remaining, packet reception, packet transmission.

The visualization module 143 is a module that displays the results from the simulation motion visualization module 142 and the simulation analysis result visualization module 141 in 2D or 3D. The visualization module 143 is a 2D visualization module 143a for a 2D representation, and a 3D visualization module ( 143b). The environment change scenario generation tool module allows the simulator to create environment change scenarios to be used as input through the UI.

The problem analysis module 144 proposes an appropriate number of sensor nodes arranged in a space, and items to be corrected in a sensor network to be simulated to improve communication speed between sensor nodes. The problem analysis module 144 represents an image visualized for the space through the visualization module 143 and a problem result report displayed in association with the image.

This will be described with reference to FIG. 4 together.

4 illustrates an example of an interface presented by the problem analysis module 144.

Referring to FIG. 4, the problem analysis module 144 may include an image of a simulation target space, a number of sensor nodes having a communication problem, a number of redundant routers, and information on a sensor node that cannot communicate with each other. Display.

In addition, the problem analysis module 144 is a menu for obtaining the minimum number of nodes needed in the space (building) in consideration of the communication range of each sensor node or the sensing range for environmental changes, which is additionally required for speed improvement. And a speedup menu for presenting the number and location of sensor nodes and routers, and a stability setup menu.

5 shows a block diagram of an example of a simulator.

In the illustrated simulator 120, the simulation result storage / analysis module 121 refers to all nodes necessary for generating simulation results from the node simulation module 122 and the network environment simulation module 123 with reference to the output options set by the user. Collect relevant information and packet transmission related information.

The simulation result storage / analysis module 121 generates the collected information as an intermediate log every time interval or event occurs. The simulation result storage / analysis module 121 generates a final result log file by extracting statistical results and estimation results based on the intermediate results continuously collected when the simulation ends.

6 shows an example of hierarchical motion visualization.

Referring to FIG. 6, the motion visualization may be expressed in three steps. First, in the first stage, the whole project of the simulation target can be shown by layer, and in the second stage, the details of each layer can be shown. In this case, the node represents the amount of energy by color, and the flow of the packet is the thickness of the arrow. It is expressed as You can express each room or arc more detailed than steps 2 through 2.

In addition, although the preferred embodiment of the present invention has been shown and described above, the present invention is not limited to the specific embodiments described above, but the technical field to which the invention belongs without departing from the spirit of the invention claimed in the claims. Of course, various modifications can be made by those skilled in the art, and these modifications should not be individually understood from the technical spirit or the prospect of the present invention.

1 is a conceptual diagram of a sensor node simulation system according to an embodiment of the present invention;

2 is a diagram illustrating an example of an interface using a use case diagram provided by an environment change scenario editing module;

3 is a diagram illustrating an example in which a range is set in a space (building);

4 is a diagram illustrating an example of an interface presented by a problem analysis module;

5 is a block diagram of an example of a simulator, and

6 shows an example of hierarchical motion visualization.

* Description of the symbols for the main parts of the drawings *

110: environment change scenario editing module 120: simulator

130: database 140: result analysis module

Claims (7)

Edit environment change scenario modeling a scenario in which a sensor node system is installed, and a scenario in which at least one event and an environment change to the space are formed and a time interval is allocated to each start and end. module; A simulator for performing a simulation for the scenario; And And a result analysis module for generating a result screen visualizing the simulation result, providing a user interface on the result screen to reflect modifications to the scenario, and reanalyzing the simulation result for the modified scenario. Sensor node simulation system. The method of claim 1, The environment change scenario editing module, Sensor node simulation system, characterized in that to model the scenario for the space using a use case diagram (use case diagram). delete The method of claim 1, The user interface is And a simulation result for the variable generation range is displayed on the result screen by varying one of the environment change generation range and the event generation range in response to a user input. The method of claim 1, The result analysis module, And a visualization module for performing any one of 2D visualization and 3D visualization of the simulation result. The method of claim 1, The result analysis module, And a problem analysis module for extracting an image of a simulation target space, a number of sensor nodes having a communication problem, a number of redundant routers, and information on a sensor node that is incapable of communication. Simulation system. The method of claim 1, The result analysis module, A simulation analysis result visualization module for visualizing any one of a simulation intermediate and a final result of the simulator; And And a simulation operation visualization module for visualizing, by the simulator, the performance result of the scenario over time.

Images