KR20090054111A - Method and system for isolated moving group member management using network - Google Patents

Abstract

Disclosed are a method and system for managing independent mobile groups using a wireless sensor network. Independent mobile group management method using a wireless sensor network according to the present invention comprises the steps of receiving from the at least one neighbor terminal connection information associated with the management terminal, based on the received connection information, the at least one neighbor Determining whether the terminal is connected to the management terminal; and when it is determined that the at least one neighboring terminal and the management terminal are not connected, the neighboring terminal is a departure terminal leaving the management group associated with the management terminal. Recognizing.

Network, mobile group, group management, connection information, departure detection

Description

Independent mobile group management method and system using wireless sensor network {METHOD AND SYSTEM FOR ISOLATED MOVING GROUP MEMBER MANAGEMENT USING NETWORK}

The present invention relates to an independent mobile group management method and system using a wireless sensor network that enables a leader of an independent group consisting of members having a dynamically expandable activity boundary range to detect and prevent out of zone for each member.

The invention of the Ministry of Information and Communication IT It is derived from the research conducted as part of the growth engine technology development project [Task Management No .: 2006-S-601-02, Project Name: u-City Applied Sensor Network System].

The prior art is a technology of notifying and tracking the location by communicating with the infrastructure terminal in the presence of the infrastructure, and the technology of notifying when leaving a certain distance or communication area from the terminal of the leader for management.

However, in case of collective action in outdoor or existing buildings where infrastructure does not exist, it is not possible to know the location of member terminals or presence / departure of members in a method that depends on the infrastructure. It is limited within signal strength, limiting the size of the herd and the behavioral boundaries of members.

Therefore, there is an urgent need for development of a group management technology using maintaining a peer-to-peer relationship as well as a management terminal of a leader.

The present invention has been made to improve the prior art as described above, the object of the present invention can be easily converged according to the setting method even if there is an existing infrastructure consisting of a sensor network, there is no existing infrastructure or in the form of isolated alone In a group activity of a group having an activity form, there is provided an independent mobile group management method and system using a wireless sensor network that can freely specify a range of activities of members.

Another object of the present invention is to manage the independent mobile group using a wireless sensor network that can save power by searching for a group of leaders owning a management terminal based on the amount of power of the terminal owned by the defector when a large number of defectors are generated. It is to provide a method and system.

Another object of the present invention is to provide an independent mobile group management method and system using a wireless sensor network that can actively prevent departure.

The object of the present invention is not limited to the above-mentioned objects, and other objects not mentioned will be clearly understood by those skilled in the art from the following description.

In order to achieve the above object and solve the problems of the prior art, the independent mobile group management method using a wireless sensor network according to an aspect of the present invention, connection information associated with whether or not to connect to the management terminal from at least one neighboring terminal Receiving; Determining whether a connection is made between the at least one neighboring terminal and the management terminal based on the received connection information; And when it is determined that the at least one neighboring terminal and the management terminal are not connected, recognizing the neighboring terminal as a departure terminal leaving the management group associated with the management terminal.

Recognizing as a departure terminal, the step of updating the departure information for the neighbor terminal based on the determination result; And using the updated departure information, recognizing the neighbor terminal as the departure terminal.

The step of recognizing the departure terminal may further include providing the updated departure information to the management terminal so that a departure warning signal for the departure terminal is transmitted to the manager of the management terminal.

The independent mobile group management method using the wireless sensor network according to an aspect of the present invention may further include transmitting the departure information to the neighbor terminal as the departure terminal so that the departure information in the neighbor terminal is updated. .

Independent mobile group management method using a wireless sensor network according to an aspect of the present invention, if it is determined that the at least one neighboring terminal and the management terminal is connected, updating the connection information; And providing the updated connection information to the management terminal so that the departure warning signal for the departure terminal delivered to the manager of the management terminal is released.

Independent mobile group management method using a wireless sensor network according to an aspect of the present invention, by transmitting the updated connection information to the neighbor terminal that is not connected to the management terminal, connected to the management terminal through the updated connection information. The non-neighboring terminal may further include connecting to the management terminal.

Independent mobile group management method using a wireless sensor network according to another aspect of the present invention, receiving departure information associated with the departure of the management group from the neighboring terminal; Determining whether to leave the neighboring terminal based on the received departure information; If it is determined that the neighbor terminal has deviated, recognizing the neighbor terminal as a detachment terminal and forming the detachment group by grouping the neighbor terminal with another detachment terminal; Checking a power amount of each of the terminals in the formed leaving group; And if there is a terminal having a power amount equal to or greater than a predetermined value among the checked power amounts, amplifying the signal strength of the terminal having a power amount equal to or greater than the selected value and initiating a search for the management group. Include.

In the independent mobile group management method using the wireless sensor network according to another aspect of the present invention, if there is no terminal having a power amount of more than a predetermined value among each of the checked power amount, the departure based on the power amount Selecting a temporary management terminal from among terminals in the group; And initiating a search for the management group through the selected temporary management terminal.

The determining of the departure of the neighboring terminal may include: updating departure information for the neighboring terminal using the received departure information; And determining whether the neighboring terminal is leaving based on the updated departure information.

Independent mobile group management method using a wireless sensor network according to another aspect of the present invention, if it is determined that the neighbor terminal has left the step of transmitting a departure warning signal for the neighbor terminal to the management terminal in the management group It may further include.

Independent mobile group management method using a wireless sensor network according to another aspect of the present invention comprises the steps of: setting a threshold of the number of discovery message transmission hops; Measuring the number of hops of a member terminal and comparing the measured number of hops with the set threshold; And outputting a departure warning signal when the measured hop number is greater than or equal to the set threshold.

The step of setting a threshold of discovery message transmission hops may include setting a hop number selected by an administrator of the management terminal as a threshold of discovery message transmission hops.

The independent mobile group management method using the wireless sensor network according to another aspect of the present invention may further include transmitting the set threshold value to a member terminal so as to be used as an indicator of the possibility of departure.

Independent mobile group management system using a wireless sensor network according to an aspect of the present invention, receiving unit for receiving connection information associated with the connection to the management terminal from at least one neighboring terminal; A determination unit determining whether a connection between the at least one neighboring terminal and the management terminal is based on the received connection information; And a recognizing unit that recognizes the neighboring terminal as a departure terminal leaving the management group associated with the management terminal when it is determined that the at least one neighboring terminal and the management terminal are not connected.

The recognition unit may update the departure information for the neighbor terminal based on the determination result, and recognize the neighbor terminal as the departure terminal using the updated departure information.

The recognition unit may provide the updated departure information to the management terminal so that the departure warning signal for the neighboring terminal is transmitted to the manager of the management terminal.

The independent mobile group management system using the wireless sensor network according to an aspect of the present invention may further include a transmitter for transmitting the departure information to the neighbor terminal as the departure terminal so that the departure information in the neighbor terminal is updated. .

Independent mobile group management system using a wireless sensor network according to an aspect of the present invention, if it is determined that the at least one neighboring terminal and the management terminal is connected, further comprises an update unit for updating the connection information, the transmitting unit May provide the updated connection information to the management terminal so that the departure warning signal for the neighboring terminal delivered to the manager of the management terminal is released.

The transmitter may transmit the updated connection information to a neighboring terminal that is not connected to the management terminal, such that a neighboring terminal that is not connected to the management terminal is connected to the management terminal through the updated connection information.

Independent mobile group management system using a wireless sensor network according to another aspect of the present invention, the receiving unit for receiving departure information associated with the departure of the management group from the neighboring terminal; A determination unit determining whether the neighboring terminal is separated based on the received departure information; A recognition unit recognizing the neighboring terminal as the leaving terminal when it is determined that the neighboring terminal has left; A grouping unit for grouping the neighboring terminal with another leaving terminal to form a leaving group; And checking the power amount of each of the leaving terminals in the formed leaving group, and if there is a terminal having a power amount greater than or equal to a predetermined value among the checked power levels, a signal of the terminal having a power amount greater than or equal to the predetermined value. And a search unit for amplifying the intensity to initiate a search for the management group.

If there is no terminal having a power amount equal to or greater than a predetermined value among the checked power amounts, the search unit selects a temporary management terminal among the terminals in the leaving group based on the power amount, The discovery of the management group may be initiated through the provisional management terminal.

The determination unit may use the received departure information, update departure information for the neighbor terminal, and determine whether the neighbor terminal leaves, based on the updated departure information.

Independent mobile group management system using a wireless sensor network according to another aspect of the present invention, if it is determined that the neighbor terminal has exited, the departure warning for transmitting a departure warning signal for the neighbor terminal to the management terminal in the management group It may further include wealth.

Specific details of other embodiments are included in the detailed description and the accompanying drawings.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, only the present embodiments to make the disclosure of the present invention complete, and common knowledge in the art to which the present invention pertains. It is provided to fully inform the person having the scope of the invention, which is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

According to an embodiment of the present invention, even if there is an existing infrastructure composed of a sensor network, it can be easily converged according to a setting method, and in a group activity of a group having no existing infrastructure or having an isolated form of activity alone, You can freely specify the scope of your free activity.

According to an embodiment of the present invention, when a plurality of defectors are generated, power can be saved by searching for a leader group owning a management terminal based on the amount of power of the terminal owned by the defector.

According to the embodiment of the present invention, departure can be actively prevented.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention;

1 is a conceptual diagram of an independent mobile group management system using a wireless sensor network according to an embodiment of the present invention.

Referring to FIG. 1, an independent mobile group management system using a wireless sensor network according to an embodiment of the present invention includes a management terminal 101, a member terminal 102, and a departure group 110 that exist in the management group 100. An exit terminal 111 existing within the member terminal 102 and the exit terminal 111 and the neighboring terminal 120 neighboring.

Each terminal 101, 102, 111, 120 is a sensor node having a resettable RF signal. Each terminal (101, 102, 111, 120) may set the RF signal strength large or small, in order to adjust the activity range of the group member. In addition, each terminal (101, 102, 111, 120) may be equipped with a channel scan and setting function in case a specific channel is not available.

As mentioned above, each of the terminals 101, 102, 111, and 120 belongs to two areas (the management group 100 and the departure group 110). The member terminal 102 belonging to the management group 100 has a connection within a multi-hop from the management terminal 101. The management terminal 101 registers all member terminals 102 in advance to prevent intrusion from the non-registered terminals. The member terminal 102 also registers the management terminal 101 and does not participate in group formation of unauthorized terminals which play a role similar to that of the management terminal 101.

The leaving terminal 111 belonging to the leaving group 110 is a state transitioned from the member terminal 102 when there is no connection from the management terminal 101, and the terminals and the leaving group within the multi-hops. Form 110. The member terminal 102 and the departure terminal 111 have a neighbor terminal 120 having a relationship within one hop with itself. The exit group 110 notifies the user of the connection relationship and the exit warning with the neighboring terminal 120, and when the neighboring terminal 120 exits the neighboring terminal 120 that is detached with another exiting terminal 111, the individual. Can prevent behavior.

FIG. 2 is a diagram schematically illustrating an internal configuration of the management terminal 101 of FIG. 1.

1 and 2, the management terminal 101 has an information table for all the terminals it manages and monitors. The information table includes a member terminal table 210 and a departure terminal table 220.

The member terminal table 210 may be information about the member terminal 102, and may include identifier information of the member terminal 102 and individual or personal information necessary for managing a group of the member terminals 102.

The leaving terminal table 220 may include identifier information of the leaving terminal 111 and entity or personal information necessary to manage a group of the leaving terminals 111 as information on the leaving terminal 111.

3 is a diagram schematically illustrating an internal configuration of the member terminal 102 of FIG. 1.

1 and 3, the member terminal 102 includes a neighbor information table 310 and connectivity information 320. The neighbor information table 310 may include an identifier of the neighbor terminal 111 and, if necessary, the connectivity information 320 associated with the minimum multi-hop from the management terminal of the neighbor terminal 111.

In case of having multiple routing paths connected from the management terminal 101, having the connectivity information 320 related to the minimum multi-hop from the management terminal 101 means having a plurality of multi-hop connectivity information 320. do. Therefore, the member terminal 102 transmits the minimum connectivity information among the multi-hop connectivity information 320 to the neighboring terminal 120 as representative information.

The connectivity information 320 may have a value obtained by adding 1 to a valid minimum number of hops among the multi-hop connectivity information 320 of the neighboring terminal 120 (valid minimum hop number + 1), and may be satisfied by only a hello message. have.

4 is a diagram schematically illustrating an internal configuration of the leaving terminal 111 of FIG. 1.

1 and 4, the leaving terminal 111 includes a neighbor information table 410 and connectivity information 420. The neighbor information table 410 may include an identifier of the leaving terminal 111 and, if necessary, the connectivity information 420 associated with the minimum multi-hop from the managing terminal of the leaving terminal 111.

In the case of having multiple routing paths connected from the management terminal 101, having the connectivity information 420 associated with the minimum multi-hop from the management terminal 101 means having a plurality of multi-hop connectivity information 420. do. Therefore, the departure terminal 111 transmits the minimum connectivity information among the plurality of multi-hop connectivity information 420 to the neighboring terminal 120 as representative information.

The connectivity information 420 may have a value obtained by adding 1 to a valid minimum number of hops among the multi-hop connectivity information 420 of the neighboring terminal 120 (valid minimum hop number + 1), and may be satisfied by only a hello message. have.

5 to 6 are flowcharts illustrating an independent mobile group management method using a wireless sensor network according to an embodiment of the present invention. Here, the independent mobile group management method using the wireless sensor network according to an embodiment of the present invention may be implemented by the mobile group management system of FIG.

Prior to describing an embodiment of the present invention, an independent mobile group management method using a wireless sensor network according to an embodiment of the present invention may be performed when a member terminal existing in a management group is terminated with a neighboring terminal, or This may be performed when a connection with a new neighboring terminal is established in the leaving terminal existing in the leaving group.

1, 5, and 6, the mobile group management system first determines whether each neighboring terminal 120 exists in the management group 100 to all neighboring terminals 120 of the member terminals 102 (management). Request connection information related to whether a multi-hop connection is performed from the terminal 101;

Next, in step S510, the mobile group management system receives connection information associated with whether to connect to the management terminal 101 (multi-hop connection) from at least one neighboring terminal 120.

Next, in step S520, the mobile group management system determines whether to connect (multi-hop connection) between at least one neighboring terminal 120 and the management terminal 101 based on the received connection information. As a result of determination, when at least one neighboring terminal 120 and the management terminal 101 are connected (in the YES direction in S520), the mobile group management system updates the received connection information in step S530.

In operation S540, the mobile group management system transmits the updated connection information to the neighbor terminal 120 that is not connected to the management terminal 101. Accordingly, the neighbor terminal 120 may be connected to the management terminal 101 by using the updated connection information.

In addition, the mobile group management system may provide the updated connection information to the management terminal (101). Accordingly, when the departure warning signal for the departure terminal 111 is generated in step S550, the mobile group management system may release the departure warning signal.

However, when it is determined that at least one neighboring terminal 120 and the management terminal 101 are not connected (NO direction of S520), the mobile group management system uses the neighboring terminal 120. The management group 100 associated with the management terminal 101 is recognized as the leaving terminal 111.

That is, the mobile group management system updates the departure information for the neighbor terminal 120 based on the determination result, and recognizes the neighbor terminal 120 as the leaving terminal 111 by using the updated departure information. can do.

In addition, the mobile group management system may provide the updated departure information to the management terminal 101, so that the departure warning signal for the departure terminal 111 is transmitted to the manager of the management terminal 101.

In addition, the mobile group management system may transmit the departure information to the neighbor terminal 120 as the departure terminal 111, so that the departure information in the neighbor terminal 120 is updated.

Meanwhile, when it is determined that at least one neighboring terminal 120 and the management terminal 101 are not connected (NO direction of S520), the mobile group management system performs FIG. 6.

That is, in step S610, the mobile group management system receives departure information associated with departure of the management group 100 from the neighboring terminal 120.

Next, in step S620, the mobile group management system determines whether the neighboring terminal 120 has left, based on the received departure information. At this time, the mobile group management system updates the departure information for the neighbor terminal 120 by using the departure information received in step S610, and based on the updated departure information, the neighbor terminal 120. It is possible to determine whether the deviation of the.

Next, when it is determined in step S630 that the neighboring terminal 120 has left, the mobile group management system recognizes the neighboring terminal 120 as the leaving terminal 111. In addition, if it is determined that the neighboring terminal 120 has left, the mobile group management system may transmit a departure warning signal for the neighboring terminal 120 to the management terminal 101 in the management group 100.

Next, in step S640, the mobile group management system forms a departure group 110 by grouping the neighboring terminal 120 recognized as the departure terminal 111 with another departure terminal 111. Of course, if the departure group 110 is already formed, the mobile group management system can join the neighboring terminal 120 recognized as the departure terminal 111 to the departure group 110.

Next, in step S650, the mobile group management system checks the amount of power of each of the leaving terminals 111 in the formed leaving group 110. In operation S660, the mobile group management system determines whether there is a departure terminal 111 having a power amount equal to or greater than a predetermined value among the checked power amounts.

As a result of the determination, when there is a departure terminal 111 having a power amount greater than or equal to a predetermined value (YES direction in S660), the mobile group management system signals the departure terminal 111 having a power amount greater than or equal to a predetermined value. The intensity is amplified to initiate a search for the management group 100. As a result, the mobile group management system may maintain a hop connection with the management group 100 with respect to the departure terminal 111 in the departure group 110.

On the other hand, if there is no departure terminal 111 having a power amount greater than the selected value as a result of the determination ('NO' direction of S660), the mobile group management system in step S680 the departure group 110 The temporary management terminal is selected from among the escape terminals 111.

In this case, the mobile group management system may select the temporary management terminal based on the amount of power of each departure terminal 111. For example, the mobile group management system may select, as the temporary management terminal, the leaving terminal 111 having the maximum amount of power among the leaving terminals 111.

Next, in step S690, the mobile group management system initiates a search for the management group 100 through the selected temporary management terminal. As a result, the mobile group management system may maintain a hop connection with the management group 100 with respect to the departure terminal 111 in the departure group 110.

In another embodiment, the mobile group management system may set a threshold of the number of discovery message transmission hops as an aggressive method for preventing the departure of the terminal. In this case, the mobile group management system may set the number of hops selected by the manager of the management terminal 101 as a threshold of the number of hops for the discovery message transmission. In addition, the mobile group management system may transmit the set threshold value to the member terminal to be used as an indicator indicating the possibility of departure.

Next, the mobile group management system may measure the hop number of the corresponding member terminal 102 and compare the measured hop number with the set threshold. As a result of the comparison, when the measured number of hops is greater than or equal to the set threshold, the mobile group management system may output a departure warning signal to the management terminal 101 and the member terminal 102. Accordingly, the user of the management terminal 101 and the member terminal 102 can prevent the departure by recognizing the departure of the terminal with reference to the output departure warning signal.

An independent mobile group management method using a wireless sensor network according to an embodiment of the present invention includes a computer readable medium including program instructions for performing operations implemented by various computers. The computer readable medium may include program instructions, local data files, local data structures, or the like, alone or in combination. The media may be those specially designed and constructed for the purposes of the present invention, or they may be of the kind well-known and available to those having skill in the computer software arts. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tape, optical recording media such as CD-ROMs, DVDs, magnetic-optical media such as floppy disks, and ROM, RAM, flash memory, and the like. Hardware devices specifically configured to store and execute the same program instructions are included. Examples of program instructions include not only machine code generated by a compiler, but also high-level language code that can be executed by a computer using an interpreter or the like.

7 is a block diagram illustrating an independent mobile group management system using a wireless sensor network according to an embodiment of the present invention. Here, the independent mobile group management system using the wireless sensor network according to an embodiment of the present invention may be mounted and implemented in the member terminal 102 of FIG. 1.

1 and 7, an independent mobile group management system using a wireless sensor network according to an embodiment of the present invention includes a receiver 710, a determiner 720, a recognizer 730, a transmitter 740, And an update unit 750.

The receiving unit 710 receives connection information associated with whether the connection with the management terminal 101 from at least one neighboring terminal 120.

The determination unit 720 determines whether the connection between the at least one neighboring terminal 120 and the management terminal 101 based on the received connection information.

If it is determined that the at least one neighboring terminal 120 and the management terminal 101 are not connected, the recognition unit 730 leaves the neighboring terminal 120 leaving the management group 100 associated with the management terminal 101. Recognize as the departure terminal 111.

In this case, the recognition unit 730 updates the departure information on the neighbor terminal 120 based on the determination result, and recognizes the neighbor terminal 120 as the leaving terminal 111 by using the updated departure information. do.

The transmitter 740 provides the updated departure information to the management terminal 101, so that the departure warning signal for the neighbor terminal 120 is transmitted to the manager of the management terminal 101. In addition, the transmitter 740 may transmit the departure information to the neighbor terminal 120 recognized as the departure terminal 111, so that the departure information in the neighbor terminal 120 is updated.

The updater 750 updates the connection information when it is determined by the determination unit 720 that at least one neighboring terminal 120 and the management terminal 101 are connected. In this case, the transmitter 740 may provide the updated connection information to the management terminal 101 so that the departure warning signal for the neighbor terminal 120 transmitted to the manager of the management terminal 101 may be released. Alternatively, the transmitter 740 transmits the updated connection information to the neighbor terminal 120 that is not connected to the management terminal 101, and the neighbor terminal that is not connected to the management terminal 101 through the updated connection information. 120 may be connected to the management terminal 101.

8 is a block diagram illustrating an independent mobile group management system using a wireless sensor network according to another embodiment of the present invention. Here, the independent mobile group management system using the wireless sensor network according to another embodiment of the present invention may be implemented by being mounted on the leaving terminal 111 of FIG. 1.

1 and 8, an independent mobile group management system using a wireless sensor network according to another embodiment of the present invention includes a receiver 810, a determiner 820, a recognizer 830, and a grouping unit 840. , Search unit 850, and departure warning unit 860.

The receiver 810 receives departure information associated with departure of the management group 100 from the neighboring terminal 120.

The determination unit 820 determines whether the neighboring terminal 120 has left, based on the received departure information. In this case, the determination unit 820 updates the departure information for the neighbor terminal 120 using the departure information received by the receiver 810, and based on the updated departure information, the neighbor terminal 120. It is possible to determine whether the deviation of the.

The recognition unit 830 recognizes the neighboring terminal 120 as the departure terminal 111 when the determination unit 820 determines that the neighboring terminal 120 has left.

The grouping unit 840 groups the neighboring terminal 120 recognized as the leaving terminal 111 with another leaving terminal 111 to form the leaving group 110.

The search unit 850 checks the amount of power of each of the leaving terminals 111 in the leaving group 110 formed by the grouping unit 840, and the leaving unit has a power amount greater than or equal to a predetermined value among the checked power amounts. When the terminal 111 is present, the signal strength of the leaving terminal 111 having a power amount equal to or greater than the predetermined value is amplified to start a search for the management group 100.

On the other hand, the search unit 850 temporarily manages among the departure terminals 111 in the departure group 110 when there is no departure terminal 111 having a power amount equal to or greater than a predetermined value among the checked power amounts. The terminal is selected, and the search for the management group 100 is started through the selected temporary management terminal.

In this case, the search unit 850 may select the temporary management terminal based on the amount of power of each departure terminal 111. For example, the search unit 850 may select the departure terminal 111 having the maximum amount of power as the temporary management terminal.

When the departure warning unit 860 determines that the neighboring terminal 120 has deviated by the determining unit 820, the departure warning unit 860 transmits a departure warning signal for the neighboring neighboring terminal 120 that has escaped to the management terminal 101 in the management group 100. To be sent).

While specific embodiments of the present invention have been described so far, various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the claims below, but also by the equivalents of the claims.

As described above, the present invention has been described by way of limited embodiments and drawings, but the present invention is not limited to the above-described embodiments, which can be variously modified and modified by those skilled in the art to which the present invention pertains. Modifications are possible. Accordingly, the spirit of the present invention should be understood only by the claims set forth below, and all equivalent or equivalent modifications thereof will belong to the scope of the present invention.

1 is a conceptual diagram of an independent mobile group management system using a wireless sensor network according to an embodiment of the present invention.

FIG. 2 is a diagram schematically illustrating an internal configuration of the management terminal of FIG. 1.

3 is a view schematically illustrating an internal configuration of a member terminal of FIG. 1.

4 is a view schematically illustrating an internal configuration of the leaving terminal of FIG. 1.

5 to 6 are flowcharts illustrating an independent mobile group management method using a wireless sensor network according to an embodiment of the present invention.

7 is a block diagram illustrating an independent mobile group management system using a wireless sensor network according to an embodiment of the present invention.

8 is a block diagram illustrating an independent mobile group management system using a wireless sensor network according to another embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

100: management group 101: management terminal

102: member terminal 110: exit group

111: leaving terminal 120: neighboring terminal

710, 810: receiver 720, 820: determination unit

730 and 830: recognition unit 740: transmission unit

750: update unit 840: grouping unit

850: Search unit 860: Departure warning unit

Claims (13)

Receiving connection information associated with a connection with a management terminal from at least one neighboring terminal; Determining whether a connection is made between the at least one neighboring terminal and the management terminal based on the received connection information; And If it is determined that the at least one neighboring terminal and the management terminal are not connected, recognizing the neighboring terminal as a departure terminal leaving the management group associated with the management terminal. Independent mobile group management method using a wireless sensor network comprising a. The method of claim 1, The step of recognizing as a leaving terminal, Updating departure information on the neighboring terminal based on the determination result; And Recognizing the neighbor terminal as the departure terminal by using the updated departure information. Independent mobile group management method using a wireless sensor network comprising a. The method of claim 1, The step of recognizing as a leaving terminal, Providing the updated departure information to the management terminal, such that a departure warning signal for the departure terminal is transmitted to the manager of the management terminal; Independent mobile group management method using a wireless sensor network further comprising. The method of claim 1, Transmitting the departure information to the neighboring terminal as the leaving terminal, so that the leaving information in the neighboring terminal is updated. Independent mobile group management method using a wireless sensor network further comprising. The method of claim 1, Updating the connection information when it is determined that the at least one neighboring terminal and the management terminal are connected; And Providing the updated connection information to the management terminal to release the departure warning signal for the departure terminal delivered to the manager of the management terminal; Independent mobile group management method using a wireless sensor network further comprising. The method of claim 5, Transmitting the updated connection information to a neighboring terminal not connected to the management terminal, so that the neighboring terminal not connected to the management terminal is connected to the management terminal through the updated connection information. Independent mobile group management method using a wireless sensor network further comprising. Receiving departure information associated with the departure of the management group from the neighbor terminal; Determining whether to leave the neighboring terminal based on the received departure information; If it is determined that the neighbor terminal has deviated, recognizing the neighbor terminal as a detachment terminal and forming the detachment group by grouping the neighbor terminal with another detachment terminal; Checking a power amount of each of the terminals in the formed leaving group; And If there is a terminal having a power amount equal to or greater than a predetermined value among the checked power amounts, amplifying the signal strength of the terminal having a power amount equal to or greater than the selected value and initiating a search for the management group Independent mobile group management method using a wireless sensor network comprising a. The method of claim 7, wherein Selecting a temporary management terminal from among the terminals in the leaving group based on the power amount when there is no terminal having a power amount equal to or greater than a predetermined value among the checked power amounts; And Initiating a search for the management group through the selected temporary management terminal; Independent mobile group management method using a wireless sensor network further comprising. The method of claim 7, wherein The step of determining whether the neighbor terminal is leaving, Updating departure information for the neighboring terminal by using the received departure information; And Determining whether the neighboring terminal is leaving based on the updated leaving information; Independent mobile group management method using a wireless sensor network comprising a. The method of claim 7, wherein If it is determined that the neighbor terminal has deviated, transmitting a departure warning signal for the neighbor terminal to a management terminal in the management group Independent mobile group management method using a wireless sensor network further comprising. Setting a threshold number of discovery message transmission hops; Measuring the number of hops of a member terminal and comparing the measured number of hops with the set threshold; And Outputting a departure warning signal when the measured hop number is greater than or equal to the set threshold; Independent mobile group management method using a wireless sensor network comprising a. The method of claim 11, The step of setting the threshold number of discovery message transmission hops, Setting the hop number selected by the manager of the management terminal as a threshold of discovery message transmission hops; Independent mobile group management method using a wireless sensor network comprising a. The method of claim 11, Transmitting the set threshold value to a member terminal so as to be used as an indicator indicating the possibility of departure. Independent mobile group management method using a wireless sensor network further comprising.

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