WO2014025240A1

WO2014025240A1 - Method and system for near field communication using wi-fi

Info

Publication number: WO2014025240A1
Application number: PCT/KR2013/007230
Authority: WO
Inventors: 최민
Original assignee: 충북대학교 산학협력단
Priority date: 2012-08-10
Filing date: 2013-08-12
Publication date: 2014-02-13

Abstract

The present invention relates to a method and a system for near field mVoIP communication using Wi-Fi. The method comprises: a step of setting the Wi-Fi of a mobile terminal to an access point (AP) mode, a direct connection mode or a tethering mode; a step of directly connecting to mobile terminal devices; and a step of performing voice communication via mVoIP, thus performing voice communication between users existing within a local area. The method and the system of the present invention can be downloaded from an application store and conveniently installed on a mobile device (smart phone, smart tablet, etc.) equipped with wireless Wi-Fi. The method and the system of the present invention enable users existing within a local area to conveniently use voice communication for free without using a relay (base station or the like) when a 3G/4G network is not smooth (in case of crowded users, degraded sensitivity of the radio wave or the like).

Description

Local area communication method and system using Wi-Fi

The present invention relates to a method and system for implementing a near field Wi-Fi mobile voice over Internet protocol (mVoIP) voice call application in a mobile terminal, and more particularly, by using Wi-Fi technology included in a function of a smart device. By implementing mVoIP in the environment, a near field mVoIP communication method using Wi-Fi to enable mVoIP voice calls between short distance users regardless of Internet data communication charges according to the data packet usage provided by the communication service company and It's about the system.

In the existing technology, a technology for directly communicating between terminals without going through a repeater has been proposed. This has the advantage of increasing the efficiency of the base station by reducing the load on the base station. Then, some examples of the existing technology in which direct communication between terminals is made.

The technology of "Nearly Mobile Phone Capable of Near-Multilateral Communication" of Korean Patent Laid-Open Publication No. 2002-0079115 discloses a direct call without using a base station between users at a short distance by jointly using a predetermined separate frequency between users.

The technique of Korean Patent Publication No. 2001-0047105, "Radio Frequency Transmitting and Receiving Device for a Combined Radio Terminal", processes a signal of a 400 MHz band transmitted and received when an RF transceiver is used in a radio in a general terminal. Conversion to a frequency band is disclosed. In other words, by converting an RF received signal of 400 MHz band into an RF signal of 800 MHz band at the time of reception, and converting an RF signal of 800 MHz band into an RF signal of 400 MHz band at the time of transmission, when using a radio function in the short-range communication. Since it communicates with the other terminal directly without going through the base station, it can reduce the communication cost to the user.In addition, since the terminal communicates directly with each other using the radio function, it reduces the load of the base station and increases the efficiency of the base station. Can be.

The technology of "Hands Free Combined Radio and its Control Method" of Korean Laid-Open Patent Publication No. 2001-0100162 discloses a radio which can be used as a handsfree by connecting to a mobile phone. If the phone is undetected (area where the 3G / 4G network is not caught), the mode switch is used to control the radio's normal call mode.

However, these techniques have a disadvantage of using a dual interface in hardware or requiring hardware processing such as mode switching, frequency band change / conversion, and synchronization. This not only complicates the circuit configuration, but also contributes to an increase in manufacturing cost.

On the other hand, NFC (Near Field Communication), Bluetooth (Bluetooth), etc. of the short-distance network technologies that are recently spreading has a narrow coverage, there is a limit in utilizing the wireless access network technology. This limitation of transmission and reception coverage (Coverage) is one of the main reasons that NFC, Bluetooth technology is still not utilized in the near field wireless voice communication field. In addition, since mVoIP operates only when data communication via the Internet, such as Internet access (HSDPA, etc.) or Wi-Fi via 3G / 4G, is possible, short-range wireless voice calls between users are also impossible when internet data communication is impossible. Is in.

[Preceding technical literature]

[Patent Documents]

Korean Laid-Open Patent Publication No. 10-2002-0079115 (published 2002.10.19.)

Korean Laid-Open Patent Publication No. 10-2001-0047105 (Published Date 2001.06.15.)

Korean Unexamined Patent Publication No. 10-2001-0100162 (published Nov. 14, 2001)

Korean Unexamined Patent Publication No. 10-2001-0094565 (Published Date 2001.11.01.)

Korean Laid-Open Patent Publication No. 10-2011-0008895 (published 2011.01.27.)

Korean Unexamined Patent Publication No. 10-2006-0122487 (published Nov. 30, 2006)

Japanese Patent Laid-Open No. 2007-257337 (published 2007.10.04.)

The present invention has been made to solve the above problems of the prior art, an object of the present invention, by utilizing the Wi-Fi technology in the mobile terminal, it is possible to simply use the mVoIP service by simply executing the application downloaded from the App Store In addition, even when Internet data communication is impossible, mVoIP services can be connected to each other by connecting the terminals with Wi-Fi (AP mode, direct connection mode, tethering mode, etc.) between users in short-range (within Wi-Fi coverage). The present invention provides a method and system for short range mVoIP communication using Wi-Fi.

In the near field mVoIP communication method and system using Wi-Fi of the present invention for achieving the above object, a short-range (within the coverage of Wi-Fi) users can not connect to the Internet by mutually connecting the terminals through Wi-Fi Or even mVoIP voice call using the Wi-Fi function of the mobile terminal even in the absence of an access point (AP).

The present invention, by setting the Wi-Fi of the mobile terminal in a method such as AP mode, direct connection mode, or tethering mode, without connecting to the external Internet or a separate Wi-Fi AP (Access Point), etc. Users located can make mVoIP voice calls with each other.

The present invention provides a method for implementing mVoIP voice call in an environment where external Internet access is limited or in the absence of an AP, and (a) SIP between local subscribers by embedding its own Session Initiation Protocol (SIP) server in a mobile terminal. Protocol processing in the local area network, or (b) omitting the process of registering (REGISTER) to the SIP server among the terminals existing in the local area, without the SIP server by the subscriber SIP INVITE the mVoIP voice call party directly There may be a method of making a call.

According to the present invention, when a short-range mVoIP application is first executed on a mobile terminal (smartphone, smart tablet, etc.), (a) whether there is a subscriber listed in his / her address book / contact by sequentially connecting to nearby accessible Wi-Fi; (B) if there is no subscriber listed in his / her address book, he / she sets the Wi-Fi to AP mode, tethering mode, or direct connection mode and waits for connection. Steps.

On the other hand, the present invention, in order to provide a Web service (Web Service) in the mVoIP application of the administrator mobile terminal in order to connect / connect to the mobile terminal that generated the AP in the user mobile terminal (interaction information input, etc.) By adding a function to provide a response by the HTTP protocol, it can be utilized in the automatic attendance management method using Wi-Fi. To this end, (a) a method of responding to a member's request, including the ability to provide a service for an HTTP protocol port (eg port 80) connection request in an administrator smart application, or (b) an administrator. Smart Application for Application may install a separate application that can handle HTTP protocol port (for example, port 80) connection request and respond to members' requests.

According to the present invention, in order to confirm that subscribers are located at a short distance from themselves, administrator smart devices (smartphones, smart tablets, etc.) and member smart devices (for example, students) have periodic time intervals (eg, , 10 seconds, 60 seconds, etc.), it is desirable to communicate with each other periodically (signal), alive message or packet (packet).

In the present invention, in order to indicate how far apart subscribers are from themselves, it is preferable to display the distance from the other terminal to itself on the screen of the mobile terminal based on Wi-Fi Signal Strength (RSSI) information.

In the present invention, the user's access information is periodically updated to the latest information by sending and receiving signals, alive messages or packets periodically with each other at regular time intervals (for example, 10 seconds, 60 seconds, etc.). Do.

On the other hand, the present invention, when one or more groups / groups are located in areas where 3G / 4G networks are not easily connected, such as alpine, military, rural, overseas, etc., a method of voice communication with Wi-Fi mVoIP It can be used for. There is a need for group / group members to communicate with each other for a variety of reasons. In this case, by utilizing the application through the present invention it is very easy to communicate with the members, it is possible to quickly determine the status of the members by immediately displaying the list of members that are not located in the short distance.

On the other hand, the present invention, in the smartphone application of the administrator (leaders, teachers, professors, etc.), a message (property value, etc.) that is specifically distinguished from other users in one hop to inform that the IP is the current administrator (property value, etc.) In addition, it can be used for an automatic attendance management method using Wi-Fi broadcasting a message to another accessor (for example, a student's smartphone). As a result, the present invention does not require a fixed IP address for the administrator, and because the internal IP address is used, it operates separately from the external Internet. Within one hop, the member smart applications automatically identify the manager smart application. By electing, it can operate without additional configuration.

On the other hand, the present invention, for the purpose of maintaining the security, such as WEP, WPA, WPA, WPA, a method for using a variety of wireless section encryption function for secure access for wireless access can be utilized in the inter-group communication method determined by the military. In addition, the present invention can be equipped with a public key manager (Embedded Public Key Manager) for public key-based user authentication, as well as symmetric keys, to use the initial public key management function to improve the reliability method such as a mobile certificate Through this method, it is possible to activate the public key manager function only after personal identification / authentication.

As described above, according to the method and system for short-range mVoIP communication using Wi-Fi according to the present invention, users carrying a mobile terminal may be in an area where they do not receive 3G / 4G network or Wi-Fi access point (AP) service. When the service is not provided smoothly due to the overload or service overload, the wireless Wi-Fi of the terminal can be set to AP mode, tethering mode, direct connection mode, etc., so that voice communication can be performed between mVoIP users located in a short distance. .

This can be done in areas where there are no repeaters (military units, countryside, national parks, hiking trails, alpine zones) or in emergency situations (exhibitions, etc.), and in areas where voice calls over 3G / 4G networks are not possible or smooth. When the above groups / groups want to communicate with each other for mutual purposes (travel, tourism, business trip, etc.), by utilizing the application through the present invention, members can simply communicate with mVoIP.

Since the present invention only needs to download and execute an application from the App Store, it is very easy to operate its own smartphone in the form of a walkie-talkie between short distance users. That is, it can operate as a short range Wi-Fi based mVoIP voice call terminal.

As a specific application example, in an area where a lot of people gather very much (baseball field, soccer field, large lecture room, etc.), voice communication through 3G / 4G network as well as data communication are not performed smoothly. In this case, as suggested by the present invention, When voice calls are made through short-range mVoIP technology, which does not require Internet access and even Wi-Fi access point (AP), the service provider can also provide smooth service by reducing the service load. By using the Wi-Fi function, you can easily use mVoIP based voice communication.

In addition, voice calls over 3G / 4G networks are not possible or smooth in areas where military repeaters are not installed (military units, suburbs / countries, national parks, hiking trails, alpine areas, overseas, etc.) or in emergency situations (exhibitions, etc.). In this case, as suggested by the present invention, if a voice call is made through a short-range mVoIP technology that does not require an external Internet connection and even a Wi-Fi access point (AP), the 3G / 4G network may provide a voice call service. Subscribers can also use mVoIP-based voice communications simply by taking advantage of the device's wireless Wi-Fi capabilities.

1 is a flowchart illustrating a message / signal / packet operation that is periodically exchanged between a mobile terminal operating in an AP mode and a mobile terminal short-range Wi-Fi mVoIP voice call application connected to an AP according to an embodiment of the present invention.

2 is a flowchart illustrating an operation of a near field mVoIP voice call application using Wi-Fi according to an embodiment of the present invention.

3 is an operation flowchart according to the SIP protocol in a short range mVoIP voice call application using Wi-Fi according to an embodiment of the present invention.

4 is a block diagram of a short range mVoIP communication system using Wi-Fi according to an embodiment of the present invention.

5 is an application example of the present invention.

6 is a flowchart illustrating an operation of a smart application for members as an application example of the present invention.

7 is an application example of the present invention, a Wi-Fi based automatic attendance management system configuration diagram.

10: mobile terminal operating system 20: mobile terminal

201: mVoIP application unit 202: network connection configuration unit

203: Embedded SIP Server 204: Embedded Web Server

205: public key manager 30: Wi-Fi MAC

40: Bluetooth 50: NFC Module

60: smart device application 601: attendance management unit

602: network connection configuration unit 603: embedded DNS server

604: Embedded Web Server

Hereinafter, a short distance mVoIP communication method and system using Wi-Fi of the present invention will be described in detail with reference to the accompanying drawings.

The mobile terminal operating in the AP mode periodically connects to the user mobile terminal accessing the AP through Wi-Fi. Here, the mobile terminal means a smart device (smartphone, smart tablet, etc.). In addition, although a case in which one mobile terminal operates in the AP mode is illustrated, each of the mobile terminals may operate in the AP mode.

In the present embodiment, for convenience of description, it will be exemplified that the mobile terminal is applied to the voice call method and system by the mVoIP protocol in the local Wi-Fi region.

Referring to FIG. 1, conceptually illustrating a message / signal / packet exchange operation between a mobile terminal operating in an AP mode and a mobile terminal application connected to an AP, the mobile terminals 1, 1 ′, 1 ″, 2 In connection, the mobile terminal 2 operating in the AP mode in order to confirm that the mobile terminal 2 operating in the AP mode and the mobile terminals 1, 1 ', 1 "connected to the AP are within a certain distance. Smart devices of the mobile terminal 1, 1 ', 1 "connected to the AP may periodically signal, alive message or packet each other at periodic intervals (for example, 10 seconds, 60 seconds, etc.). Packet communication) The existing short-range communication technology such as Bluetooth, NFC, etc. is not suitable for the purpose of the present invention due to the narrow coverage, but the Wi-Fi AP mode / tethering mode / directly adopted in the present invention. The connection mode, etc. has a coverage enough to cover a radius of 80 to 100 [m]. Due to utilizing the Wi-Fi technology in the present invention.

On the other hand, the present invention can be applied to the encryption and decryption with a variety of technologies (WEP, WPA, etc.) in the Wi-Fi wireless access interval for the purpose of maintaining the security of voice communication, such as to improve the confidentiality of the intra-group communication in the military unit, etc. useful. In particular, in the present invention, in order to improve the reliability of the public key manager, the public key manager may be granted by utilizing a personal identification authentication function such as a mobile public certificate of the initial public key management function.

2, after initializing the mobile terminal (S1), and activates the Wi-Fi (S2). Then, by accessing the accessible short-range Wi-Fi APs in order to check whether the AP is generated by the mVoIP application of the other mobile terminal (S3). This is possible by looking at a message broadcasted by a mobile terminal operating as a corresponding local Wi-Fi AP. After activating Wi-Fi on the mobile terminal, the application of the mobile terminal creating the short-range Wi-Fi AP broadcasts an attribute value distinguished from the application of the other terminal by including a message / signal / packet, thereby providing the corresponding IP address. Notify that (Address) is the smart application that created the near-field Wi-Fi AP. Therefore, when checking the broadcasting message, it is possible to distinguish whether the AP currently connected is an AP opened by a user mobile terminal or a general AP according to the present invention.

When the mobile terminals are connected to the mobile terminal operating as a Wi-Fi AP (S4), the mobile terminal searches for a user listed in its address book (S5). In this case, if a user who is not listed in his / her address book is not found, all accessible APs are searched again.

On the other hand, even though it is possible to traverse all accessible AP, if the user is not found in the address book or if the AP does not receive the broadcasting message, the AP mode (Wi-Fi tethering, AP mode directly from the mobile terminal) , Or direct connection) (S6), an AP (Access Point) that can be connected to Wi-Fi at a short distance is created and waits for access (S7).

When the user who creates the AP is Wi-Fi connected / connected to a specific user, or when two or more users are connected / connected to each other within the AP, the user may communicate through mVoIP (mobile Voice over Internet Protocol) (S8). ).

On the other hand, when using the Wi-Fi tethering mode, the gateway (Gateway) so that users do not connect to the external Internet through the 3G / 4G network of the mobile terminal (smart phone, smart tablet, etc.) device that created the AP ) Change the configuration or Domain Name Server (DNS) settings. This feature is designed to prevent instructors from incurring excessive data charges, for example, by utilizing 3G / 4G networks of instructor smart devices.

In addition, the user's mobile terminal (smartphone, smart tablet, etc.) application periodically sends a network connection request to the received instructor smart application, it informs that it is located near the instructor. At this time, the Wi-Fi gateway is changed and set in response to the connection request.

Referring to FIG. 3, as shown in the flow of packets transceiving between an mVoIP client and a SIP server, an application of a mobile terminal (smartphone, smart tablet, etc.) in the present invention performs an mVoIP client function. It is possible to communicate with mVoIP by directly connecting / connecting mobile terminals with each other without having to communicate with an embedded SIP server in the mobile terminal or with a SIP server (dotted line display).

When the built-in SIP server is activated in the mobile terminal that created the AP, an indication indicating that the built-in SIP server is in operation is added to the broadcast message, and the mobile terminal newly accessing the AP is a built-in SIP. Register through the SIP REGISTER message to the server. On the other hand, if the mobile terminal that created the AP is set not to use the built-in SIP server, an indication indicating that the built-in SIP server does not operate is added to the broadcast message. In this case, the mobile terminal newly accessing the AP may omit a SIP REGISTER message to its own embedded SIP server, and receives a list of terminals directly accessible from the mobile terminal operating as the AP. Therefore, after displaying this to the user, it connects / connects to the appropriate user mobile terminal according to the user's selection.

The application of this task can inform attendance by directly selecting an access point (AP) to which the member directly accesses through the Wi-Fi network setting menu of the smart device as the network AP name sent by the instructor smart application. In addition, the member smart application installed on the member smart device handles these functions automatically, eliminating the need for members to find and select network APs.

In addition, the short-range Wi-Fi mVoIP mobile application of the user mobile terminal has a function of periodically checking its distance by accessing the short-range Wi-Fi mVoIP application of the mobile terminal operating as an AP. This feature is used to implement a way to ensure that members' smart devices are constantly connected to the instructor's smart devices so that members can stay in close proximity to the manager for a set amount of time (if they appear and disappear temporarily) Has the advantage of easily finding a deviation from a certain distance from).

Referring to FIG. 4, a short range mVoIP communication system using Wi-Fi of the present invention includes a mobile terminal (smartphone, smart tablet, etc.) operating system 10 that is largely responsible for the overall operation of a mobile terminal, and an mVoIP voice call. It includes a mobile terminal (Mobile Terminal) 20 in charge of the operation, Wi-Fi MAC 30, Bluetooth 40, NFC module 50, and the like.

The mobile terminal (smartphone, smart tablet, etc.) operating system 10 stores and executes a program relating to the overall operation of the mobile terminal. That is, the mobile terminal performs the overall operation of the execution of the mobile terminal 20 for voice calls and the execution of the Wi-Fi MAC 30, Bluetooth 40, NFC module 50.

The mobile terminal 20 may include various applications, and includes a voice call mVoIP application in the present invention. In this application, as an example, the instructor smart application performs the function of allowing a Wi-Fi connection, and the member smart application performs the function of requesting a Wi-Fi connection. Specifically, the mVoIP application unit 201 for a voice call, the network connection configuration unit 202, the embedded SIP server 203, the embedded web server 204 is composed of.

As such, in order for users to access an application of a mobile terminal acting as an AP and provide user information (name, nickname, etc.), the mVoIP application of the mobile terminal acting as an AP may provide a web service. You can also add the ability to provide a response by the HTTP protocol. A method of responding to a user's HTTP request, including the ability to provide a service for a connection request of a port of the HTTP protocol (eg, port 80) in a smart application of a mobile terminal, or of an HTTP protocol in an application of a mobile terminal. There may be a method of installing a separate web server application that can handle a port (for example, port 80) connection request and responding to user requests.

In addition, the present invention can be equipped with a public key manager 205 (embedded public key manager, 205) for wireless section encryption for communication security during voice calls, mobile authentication certificate to use the initial public key management function for improved reliability It is possible to activate the public key manager function only after personal identification / authentication through such a method.

Meanwhile, as an application example of the present invention, an automatic attendance management method using Wi-Fi will be described.

Hereinafter, in the description of the drawings, the same reference numerals will be given to components that perform the same function.

The present invention provides a smart device (smartphone, smart phone, Wi-Fi AP) through an application installed in the embedded system (smartphone, AP, etc.) equipped with the administrator's wireless Wi-Fi for the purpose of checking attendance of members (students, etc.) It relates to an automatic attendance management method using Wi-Fi to connect to a smart tablet, etc.). (a) Wi-Fi is set to AP mode in the administrator's smart application or Wi-Fi is set to tethering mode in the administrator's smart application. Enabling members to directly access the administrator's smart device without going through a fi access point, or (b) using the Wi-Fi Direct feature in the administrator's smart application. There may be a method for accessing a smart application.

The present invention, in the case of switching the smart device for the administrator to the tethering mode among the tethering mode, AP mode, direct connection mode in order to implement the Wi-Fi attendance management function, the members utilize the 3G network of the manager smart device It is necessary to prevent access to the external Internet. Wi-Fi, which realizes this limitation by modifying the gateway or domain name server (DNS) information of the connection that is connected to the smart application for each member, is connected to the smart application for each member. It is about automatic attendance management method using Fi. (a) how to set the gateway information as a smart application for administrators, or (b) how to set the domain name server (DNS) information as a third domain name server operating in a separate smart for administrators. There may be.

The present invention provides a Wi-Fi that adds a function for providing a response according to the HTTP protocol so that members can provide a web service in the smart application for the administrator to access and interact with the smart application for the administrator (enter member information, etc.). It relates to an automatic attendance management method using. (a) how to respond to members' requests, including the ability to provide services for HTTP protocol port (e.g., port 80) access requests in the administrator's smart application; or (b) the administrator's smart application. In the HTTP protocol, there may be a method of responding to requests from members by installing a separate application that can handle a port (eg, port 80) connection request.

In the present invention, the administrator manages the attendance status of members by providing AP mode Wi-Fi service to the members, and the administrator smart device must be installed on the administrator smart device. On the other hand, the present invention allows the members to selectively download and use the smart application only when necessary, and only if you want to use the additional function (for the purpose of checking their attendance status, etc.). On the other hand, in the present invention, the administrator must purchase an application for a smart device, but the members can use the application for free, and even a free member smart application does not have to be installed. Do.

In the present invention, since the smart devices of the members (students, etc.) are always connected to the manager's smart devices, automatic attendance using Wi-Fi can confirm that the members (students, etc.) are in a space close to the manager for a predetermined time. It is about a management method. (a) Compared to oral attendance check, the present invention can be used for the purpose of solving problems such as members (students, etc.) substitute attendance or leave the classroom after responding to the attendance check call, and (b) age It may be used for the purpose of periodically and automatically verifying that younger members (kindergarten, lower grade elementary school students, etc.) are within a certain distance from the leader (teachers / teachers, etc.) during an external activity as a group. If they move to a group (tourism, business trip, etc.), it can be used for the purpose of checking whether all members of the group transportation means (charter bus, etc.) boarded.

According to the present invention, in order to confirm that the user is within a predetermined distance, the administrator's smart device (smartphone, smart tablet, etc.) and the student's smart device are used at periodic intervals (for example, 10 seconds, 60 seconds, etc.). The present invention relates to an automatic attendance management method using Wi-Fi, which periodically transmits and receives a signal, an alive message, or a packet to each other.

When a large number of members move by using a group means of transportation (bus, etc.) temporarily for group movement (travel, tourism, business trip, etc.), the means of transportation must stop again after stopping for various reasons. Occurs. At this time, by utilizing the application through the present invention, it is very easy to automatically check whether all members have boarded the vehicle, and quickly contact by displaying the list of non-boarding members and contacts on the smartphone of the leader. The present invention relates to an automatic attendance management method using Wi-Fi.

According to the present invention, when members (students, etc.) are initially connected to a smartphone of a manager (leader, professor, teacher, etc.) for the first time (first time), a personal information input form appears on the screen so that the member's personal information (student number) , Grade, name, address, mobile phone, e-mail, etc.) to the automatic attendance management method using Wi-Fi.

The present invention, in the automatic attendance management method that allows members to obtain their attendance report by connecting to the administrator's smart application via Wi-Fi as a member smart application, if the member wants to check his attendance status information It is about. At this time, based on the current attendance status information, it can automatically deliver a notification / warning message for their attendance later.

In the present invention, the member smart application is a message / signal / packet sent by the administrator smart application by the thread operating in the background (leave / reinforcement information, lecture time change, meeting time change, meeting place change, etc.) It relates to an automatic attendance management method using Wi-Fi that can receive and alarm the member smartphone. Threads always run in the background, but it's a good idea to set up check intervals for messages / signals / packets, etc. to consume minimal resources on member smartphones.

In the present invention, a smartphone application of a manager (leader, teacher, professor, etc.) adds a message (attribute value, etc.) that is specially distinguished from other users in one hop to inform that the IP is the current manager. The present invention relates to an automatic attendance management method using Wi-Fi, which broadcasts a message to another visitor (eg, a student's smartphone). As a result, the present invention does not require a fixed IP address for the administrator. Since the internal IP address is used, the device operates independently from the external Internet. Within one hop, the member smart applications automatically identify the manager smart application. By electing it, it can operate without any configuration.

As shown in FIG. 1, a plurality of member smart devices 1, 1 ′, 1 ″ and an administrator smart device 2 periodically connect via Wi-Fi. , 1 ', 1 ") means a smart device possessed by a student, a kindergarten student, a group tourist, and the like, and the smart device for administrator 2 means a smart device possessed by a professor, a teacher, a leader, and the like. And, a smart device means a smart phone, a smart tablet, and the like.

In the present embodiment, for the convenience of explanation, it will be illustrated that the member smart devices 1, 1 ', 1 "and the manager smart device 2 are applied to the attendance management system used in the school. In the manager smart device 2, information on a member smart device is stored in advance.

Referring to FIG. 1, in order to confirm that the members are within a predetermined distance from the manager, the manager's smart device (smartphone, smart tablet, etc.) and the member's smart device have a periodic time interval (eg, 10 seconds, 60 seconds). Second, etc.) shows an automatic attendance management method using Wi-Fi, which periodically transmits and receives a signal, an alive message, or a packet to each other. In a real classroom, instructor smart devices were placed in front of the classroom, and member smart devices were moved in the classroom to measure signal strength (RSSI). Conventional short-range communication technologies such as Bluetooth and NFC are not suitable for the purpose of the present invention (covering a large classroom of 50 meters or more) due to narrow coverage, whereas the Wi-Fi AP mode / tethering mode / directly adopted in the present invention. Connected mode, etc., demonstrates that you must have enough coverage to cover the entire classroom.

5 is an application example of the present invention.

Referring to FIG. 5, after initializing an instructor smart device (S11), the instructor smart device does not use an ad hoc mode (S12) of the Wi-Fi operation mode (S12), but only an access point (AP) mode. use.

The smart application for instructors switches Wi-Fi to tethering, Wi-Fi direct, or AP mode to allow access from members (S13). Instructor smart applications periodically broadcast a special message (informing member smart applications that they are an instructor version by setting and delivering information in a specific field) to inform them that they are instructor smart applications. .

In this case, the gateways or the domain name server (DNS) settings are changed to prevent the members from accessing the external Internet through the 3G network of the smart device for instructors. This feature prevents instructors from incurring excessive data charges by leveraging the 3G network of instructor smart devices.

In addition, the member's smart application periodically sends a network connection request to the received instructor's smart application (S14), indicating that it is located in close proximity with the instructor. At this time, the Wi-Fi gateway is changed and set in response to the connection request (S15).

On the other hand, when the network connection of the instructor smart device is made and attendance is confirmed (S16), the instructor smart application records information such as the date / time / attendance holding time that the member connected to the database (S17) (S17). ). At this time, in order to check whether the attendance record is well left, the member executes the smart device application (attendance management application) that can access the instructor's smart application and obtain information. This information is periodically checked and stored (S18).

On the other hand, when the set time has elapsed, when the smart device of the member is not recognized, the instructor smart device displays the information of the member as an alarm and alerts (S19).

Referring to FIG. 6, after initializing the smart device for the member (S21) and setting the Wi-Fi operation mode (S22), the member accesses the smart application for the instructor through the smart application, so that the current self is close to the instructor. In (can be present) can be informed (S23).

This task can be notified by attendance by directly selecting an access point (AP) to be accessed by the smart application for instructors from the smart device's Wi-Fi network setting menu. In addition, the member smart application installed on the member smart device handles these functions automatically, eliminating the need for members to find and select network APs.

In addition, the member smart application has a function of periodically checking the attendance status by accessing the instructor smart application (S24 to S25). This feature is used to implement a way to ensure that members' smart devices are constantly connected to the instructor's smart devices so that members can stay in close proximity to the manager for a set amount of time (if they appear and disappear temporarily) Has the advantage of easily finding a deviation from a certain distance from).

If a member wants to check whether his attendance record is well left to the instructor, it is possible to access the instructor's smart application and execute the member's smart application to obtain information. For this purpose, the instructor smart application periodically broadcasts a message informing the member smart applications that the instructor is a teacher version by setting and conveying information in a specific field. Therefore, the member accesses the IP address of the instructor smart application received by the member to query the decision report, and the instructor smart application responds to the member's query using information stored in the database.

As such, a member may add a function that provides a response based on the HTTP protocol to provide a web service in the instructor smart application to access and interact with the instructor smart application (enter member information, etc.). How to respond to members' requests, including the ability to provide services for HTTP protocol ports (e.g., port 80) in instructor smart applications, or ports for HTTP protocols in instructor smart applications ( For example, there may be a method of installing a separate application capable of handling a connection request (port 80) and responding to members' requests.

Referring to Figure 7, the Wi-Fi-based automatic attendance management system configured in the smart device of the present invention, the smart device operating system 10 responsible for the overall operation of the smart device and responsible for the operation related to attendance management Smart device application 60, Wi-Fi MAC 30, Bluetooth 40, NFC module 50 and the like.

The smart device operating system 10 stores and executes a program related to the overall operation of the smart device. That is, the smart device application 60 performs the overall operation of the execution of the Wi-Fi MAC 30, Bluetooth 40, NFC module 50.

The smart device application 60 may include various applications. In the present invention, the smart device application 60 includes an application related to attendance management. In this attendance management application, the instructor smart application performs the function of allowing Wi-Fi connection, and the member smart application performs the function of requesting a Wi-Fi connection. Specifically, the attendance management unit 601, the network connection configuration unit 602, the embedded DNS server 603, and the embedded web server 604.

According to the present invention, there is an advantage of solving the problem that the time required for checking the attendance increases when there are a large number of members, and can automatically check through smart devices held by instructors and members. In fact, when a faculty member manages the attendance status of 50 to 60 members, checking them by calling them individually usually takes about 5 to 10 minutes. On the other hand, by utilizing the smart application proposed in the present invention, it is convenient because each member can conveniently check the attendance status by actively sending a connection request to the instructor smart device.

Such attendance status information is stored in the instructor smart device (database, etc.), so it is easy to calculate attendance data for each individual, and the instructor can later view the attendance data of the member. The instructor can ensure that attendance status and lecture information (leave, reinforcement, number of students, absenteeship, etc.) of the class operated by him is stored only on his / her smart device, so that it is not leaked to the external system. Therefore, instructors can use it with confidence. In general, the reason why people do not prefer to use the electronic attendance system already installed in a large number of university classrooms is that they are concerned about the information (leave, reinforcement, student numbers, etc.) about the lectures. Since information is stored only in smart devices, there is an advantage that instructors can use with confidence.

As such, according to the automatic attendance management method using Wi-Fi according to the present invention, the wireless Wi-Fi of the administrator (professor, teacher, leader, etc.) for the purpose of checking attendance of members (students, kindergarten students, group tourists, etc.) Real-time management of members by checking / maintaining / saving the status of accessing smart devices (smartphones, smart tablets, etc.) via Wi-Fi from applications installed on embedded systems (Smartphones, APs, etc.) equipped with Fi Insoles and attendance checks can be easily calculated.

In addition, in the case where a large number of members are temporarily moved by using a group moving means (bus, etc.) for group movement (travel, tourism, business trip, etc.), when the members of the present invention are utilized, the members are all moving means. It is very easy to check whether you have boarded on, you can immediately display the list of non-boarding members and contacts on the smartphone of the manager (leader) can be contacted very quickly.

Although the present invention has been described in more detail with reference to some embodiments, the present invention is not necessarily limited to these embodiments, and various modifications can be made without departing from the spirit of the present invention.

Claims

Activating Wi-Fi of the mobile terminal;

Searching for the mobile terminals listed in the address book through the attribute values of the searched mobile terminals;

Making a direct connection between the mobile terminal and the mobile terminal listed in the address book; And

And performing a voice call through mVoIP (mobile voice over internet protocol) based on a Wi-Fi connection between the mobile terminal and the mobile terminal listed in the address book.
The method of claim 1,

The activation of the Wi-Fi, characterized in that the selection of any one of the AP (access point) mode, direct connection (direct mode), tethering (tethering) mode in the mobile terminal that generated the AP (Access Point) Near field mVoIP communication method using Wi-Fi.
The method of claim 2,

In the case of using the tethering mode, gateway or domain name server (DNS) information is modified for a connection with a mobile terminal listed in the address book in order to block external Internet access. Near field mVoIP communication method using Wi-Fi.
The method of claim 1,

When the Wi-Fi direct connection is made between the mobile terminal and the mobile terminal listed in the address book, the application of the mobile terminal that generates the access point (AP) generates an attribute value distinguished from the application of the other mobile terminal in a message / signal / packet. By including a broadcast (broadcasting), the short-range mVoIP communication method using the Wi-Fi, characterized in that the IP address (address) of the application of the mobile terminal for generating the access point (AP).
The method of claim 1,

The mVoIP voice call application includes an embedded public key manager for wireless section encryption for voice call communication security, and is open to use an initial public key management function for user authentication. A short-range mVoIP communication method using Wi-Fi, characterized in that mVoIP voice call is made only through a corresponding user using a public key manager.
In the system that makes a voice call through mVoIP (mobile Voice over Internet Protocol) based on the Wi-Fi connection between mobile terminals,

When the mobile terminal has its own SIP (Session Initiation Protocol) server, the local area network using the Wi-Fi, characterized in that the voice processing through the mVoIP is carried out by processing the processing of the SIP protocol in the local area network between the mobile terminal mVoIP communication system.
In the system that makes a voice call through mVoIP (mobile Voice over Internet Protocol) based on the Wi-Fi connection between mobile terminals,

If a mobile terminal does not have its own SIP (Session Initiation Protocol) server, a specific terminal within 1 hop manages the user's IP address and provides an IP address for the visitor to SIP INVITE the near mobile terminal directly, thereby making a voice call through the mVoIP. Near field mVoIP communication system using Wi-Fi, characterized in that is made.
Setting the Wi-Fi of the administrator smart device to an access point (AP) mode, a direct connection mode, or a tethering mode;

Directly connecting with member smart devices; And

And periodically storing information of the member smart device.
The method of claim 8,

In the step of connecting with the member smart device, when the administrator smart application uses the tethering mode, in order to block the member's external Internet access, a gateway or domain name of a connection connected to each member smart application Near field mVoIP communication method using Wi-Fi, characterized in that for modifying the server (DNS) information.
The method of claim 8,

After the step of connecting with the member smart device, the administrator smart application broadcasts a message / signal / packet having a different attribute value to the member smart device compared to other accessors in one hop. By doing so, the short-range mVoIP communication method using Wi-Fi, characterized in that the IP address (address) that the current smart application for administrators.
The method of claim 8,

A method of short-range mVoIP communication using Wi-Fi, characterized in that for interacting with the member smart device through a web (web) service by executing a service that provides a response to the administrator smart application by the HTTP protocol.
The method of claim 8,

In the step of periodically storing the information of the member smart device, the storage is continued for a set time so that it is possible to sum up / output information such as attendance statistics later, the information of the previously stored member smart device is retrieved If not, the mVoIP communication method using Wi-Fi, characterized in that the display of the member's departure status (alarm) to the manager smart device, or calling the member smart device.
The method of claim 8,

The member smart device transmits or alarms a message between the manager and the member by sending and receiving a message sent from the manager smart application by a thread operating in the background, or the member and the manager are the smart device. Short-range mVoIP communication method using a Wi-Fi, characterized in that it includes a function such as question and answer, the administrator surveys from the members.