KR100456311B1 - Peer-to-peer mode communication service equipment and method among wireless communication terminals using wireless LAN - Google Patents

Abstract

The present invention relates to a service apparatus and a method for enabling direct communication in a peer-to-peer mode between terminals without going through the Internet when a wireless data communication terminal equipped with a wireless LAN module is located within a predetermined range.

To this end, the wireless data communication terminal includes a wireless LAN module and a driving software installed therein, and includes a plurality of wireless repeaters each having a unit cell in which wireless LAN-based peer-to-peer mode communication is performed. Relays data transmitted and received between unit cells for peer mode communication. The calling wireless data communication terminal sends a calling message for calling the peer-to-peer mode communication address of the called wireless data communication terminal using a wireless LAN module and responds to the calling message from the called wireless data communication terminal. After waiting for a call, when an incoming call response is returned from the called wireless data communication terminal, a communication path with the called wireless data communication terminal is connected to transmit and receive voice and data with the called wireless data communication terminal.

Description

Peer-to-peer mode communication service equipment and method among wireless communication terminals using wireless LAN}

The present invention relates to a wireless data communication terminal equipped with a wireless LAN card, and more particularly, to an apparatus and method for a peer-to-peer mode communication service for a wireless data communication terminal using a wireless LAN.

Currently, the Internet is used as an essential communication medium for modern people, and information provision and confirmation of information through the Internet are generalized, and their use is gradually widening. To use the Internet, you need a chip that can access the Internet or a terminal with a built-in device (computer, PCS phone, cellular phone, notebook PC, PDA, etc.). . For example, a computer or a notebook PC connects to the Internet through a wired line, while a PCS phone, a cellular phone, and a PDA connect to the Internet using a wireless communication protocol. In some cases, a PCS phone can be connected to a computer or notebook PC to connect to the Internet via wireless communication.

As a method of wirelessly connecting a communication terminal to the Internet, a method of accessing the Internet using a line-based public mobile communication network such as a base station, a base station controller, a switch, and the like, and an indoor / outdoor wireless LAN using a wireless LAN card There is a method of accessing the Internet through a wireless local area network, and a method of accessing the Internet through a wireless packet network.

Among these methods, wireless LAN is a data communication method implemented as an extension or replacement concept of wired LAN, and simultaneously provides advantages of LAN and convenience of connection to share various information and resources, and provides reliable data transmission. It has the advantage of being possible and providing the network flexibility.

In particular, wireless LAN is not restricted by geopolitical installation because it does not use cables, and it is not necessary to expand or change the line even when the location of the terminal is changed and added or deleted. You can save money.

Since October 1990, the international standardization of wireless LAN has been progressed by the IEEE 802.11 committee in accordance with the OSI reference model for standardizing the medium access control and the physical layer standard. Wireless LAN is a method that transmits and receives data in the air by using radio frequency or infrared rays without using a wired (10 / 100Base Ethernet) ISM band in consideration of reach, performance, and security. Spread Spectrum wireless LAN using (902-928 MHz, 2.4-2.48 GHz, 5.725-5.85 GHz) is the most common.

The wireless LAN and the Internet are connected through a router, which plays a role of sending a message to the Internet based on information provided by the Internet protocol. In addition, the router and the Internet are connected by a broadband communication line. Currently, the broadband communication line is a dedicated line, xDSL (collectively referred to as ADSL, HDSL, SDSL, VDSL, etc.), telephone line, cable TV network, and radio frequency. Bands and the like. The dual leased line assigns one fixed IP (internet protocol) address to one terminal so that the user of the terminal can access and transmit data using the fixed IP address. When connecting to a dedicated line to which a fixed IP address is assigned in this way, an incoming and outgoing Internet telephone service for a phone-to-phone voice call over the Internet may be provided.

1 is a block diagram of a wireless LAN-based voice service network for providing an incoming / outgoing service of an Internet phone to a terminal according to the prior art.

The wireless LAN-based voice service network includes a plurality of wired and wireless LAN networks 100 and 150 for allocating dynamic IP to a wireless data communication terminal, and the Internet 120 connecting the plurality of wired and wireless LAN networks 100 and 150, VoIP gateway 130 for supporting voice communication between a terminal connected to a wired / wireless LAN network and a public telephone network (PSTN) subscriber through the Internet, and a public telephone network (PSTN) connected to the Internet 120 through the VoIP gateway 130 ( 140, the public telephone 141 of the public telephone network subscriber.

Each wired / wireless LAN network 100 includes a terminal 105 wired to a plurality of wireless data communication terminals 101, 102, 103, 104, wireless access points 106, 107, router 153, and router 153. ), A DHCP server 109 for allocating dynamic IP to each terminal, and VoIP servers 120 and 154 for performing a protocol for voice communication, and a location register for registering a location of each wireless data communication terminal. do. Although the router 108 and the Internet 120 are directly connected in the drawing, several routers may be further connected between the router 108 and the Internet 120.

When any terminal 101 generates an outgoing call including the called party's call number, the DHCP server 109 checks whether there is a dynamic IP address that can be given to the terminal, and then allocates the dynamic IP address. Then, the outgoing call is transmitted to the Internet 120 through the router 108. When the called party is a general public telephone network subscriber, the called party is connected to the called party phone 141 connected to the PSTN 140 via the VoIP gateway 130. Delivered. When a call with the called party's phone 141 is connected and a call path is assigned through the VoIP server, a call through the VoIP gateway is possible between the terminal 101 and the phone 141.

On the other hand, when the called party is a wireless data communication terminal 151 of another wired / wireless LAN network 150 and the calling party generates an outgoing call including the called party IP address, the outgoing call is only performed when using Dynamic DNS. It is delivered to the terminal 151 through the 153 and the wireless access point 152. At this time, several routers may be passed between the Internet and routers.

The internet phone service using the wireless data communication terminal has a problem that calls can be connected through the Internet only when the VoIP server establishes a communication path regardless of whether the two terminals are far apart or within a certain range.

An object of the present invention for solving the problems of the prior art as described above, the wireless data communication terminal equipped with a wireless LAN card in a multi-cell wireless LAN environment wireless data that is equipped with another wireless LAN card without a VoIP server and the Internet The present invention provides a system and a method for communicating with a communication terminal in a peer-to-peer manner.

1 is a block diagram of a voice service network providing an Internet telephony service to a wireless data communication terminal to which dynamic IP is assigned according to the prior art;

2 is a block diagram showing a peer-to-peer mode communication service apparatus for a wireless data communication terminal period using a wireless LAN according to the present invention;

3 is an internal configuration diagram of a wireless data communication terminal equipped with a wireless LAN module according to the present invention;

4 is an internal configuration diagram of a wireless repeater according to the present invention;

5 is an operation flowchart showing a peer-to-peer mode communication service method using a wireless LAN in a wireless data communication terminal according to the present invention;

6 is an operation flowchart illustrating a peer-to-peer mode communication service method using a wireless LAN in a wireless repeater according to the present invention.

※ Explanation of code about main part of drawing ※

210, 220, 230, 240: unit cell 211, 221, 231, 241: antenna

212, 222, 232, 242: access point

213, 223, 233, 243: Wireless Repeater 250: Router

260 DHCP server 270 VoIP server

280: Internet 290, 300: Data communication terminal

330: transmission and reception processing unit 340: central processing unit

350: memory unit 360: key input unit

370: display unit 380: microphone / speaker

390: battery 400: wifi module

410: RF processing unit 420: baseband processing unit

430: link control

In order to achieve the above object, a wireless data communication terminal communication system using a wireless LAN according to the present invention includes a plurality of wireless data communication terminals connected to an internet access point and a plurality of the access points to the Internet. A router is provided to provide an internet communication service to the wireless data communication terminal, and provides peer-to-peer mode communication using a wireless LAN without going through the internet during the wireless data communication terminal. Each wireless data communication terminal includes a wireless LAN module and is assigned an address for a predetermined peer-to-peer mode communication for peer-to-peer mode communication during the wireless data communication terminal period. And a plurality of wireless repeaters connected to each other, wherein each wireless repeater is within a unit cell which is in charge of and controls the wireless data communication terminal in a unit cell within a range that can be directly connected to the wireless repeater through a wireless LAN. The wireless terminal which authenticates the peer-to-peer mode communication authority of the wireless data communication terminal and controls the unit cell where the receiving terminal is located when the receiving terminal of the peer-to-peer mode communication is located in a unit cell different from the unit cell in which the wireless data communication terminal is located. Relay communication data with repeater.

The peer-to-peer mode communication method between the wireless data communication terminals in a communication system including a plurality of data communication terminals equipped with a wireless LAN module and a plurality of wireless repeaters connected to the wireless data communication terminal through a wireless LAN, The calling wireless data communication terminal sends a calling message for calling the peer-to-peer mode communication address of the called wireless data communication terminal through the wireless LAN module, and the incoming call for the calling message is received from the called wireless data communication terminal. When the response is returned, the transmitting side wireless data communication terminal establishes a communication path with the receiving side wireless data communication terminal using the wireless LAN to transmit and receive data with the receiving side wireless data communication terminal.

Hereinafter, a system and method for a peer-to-peer mode communication for a wireless data communication terminal using a wireless LAN according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2 is a block diagram illustrating a peer-to-peer mode communication system for a wireless data communication terminal period using a wireless LAN according to the present invention.

The peer-to-peer mode communication system includes antennas 211, 221, 231, and 241 provided in each unit cell 210, 220, 230, and 240, and access points 212, 222, 232, and 242 connected to the antennas, The router 250 includes a plurality of access points 212, 222, 232, and 242, a DHCP server 260, and a VoIP server 270 connected to the router 250. Each unit cell (210, 220, 230, 240) is provided with a wireless repeater (213, 223, 233, 243) with an access point connected to the antenna, the wireless repeater (213, 223, 233, 243) is a wireless data Communication terminal period The terminal authenticates the terminal for peer-to-peer mode communication and relays data transmitted and received between the terminals.

The data communication terminal 290 is connected to the access points 212, 222, 232, and 242 in a wireless communication method through the antennas 211, 221, 231, and 241 of the unit cells 210, 220, 230, and 240 to which the data communication terminal 290 belongs. Can send and receive data. Meanwhile, the wireless data communication terminal authenticates the peer-to-peer mode communication authority within the unit cell or between the unit cells by the wireless repeaters 213, 223, 233, and 243 and relays the peer-to-peer mode communication data. In this specification, the wireless data communication terminal is used as a concept encompassing a desktop computer, a terminal that can be used for data communication, such as a PDA, a notebook PC, and a wireless telephone, which are carried by a user, and unless otherwise stated, the wireless data communication terminal. Means a terminal equipped with a wireless LAN card and its driving software installed thereon for communication using the wireless LAN. A detailed internal configuration of the wireless data communication terminal is shown in FIG. 3, which will be described later.

In an embodiment of the present invention, wireless data communication terminals located in the same unit cell may directly communicate with each other in peer-to-peer mode, and wireless data communication terminals belonging to different unit cells may communicate with each other through peer repeater mode. Communication takes place. In general, peer-to-peer communication refers to a communication in which personal computer users exchange video, voice, music, text files, and the like, without a central office or base station, and herein, peer-to-peer communication. To-peer communication refers to a communication in which a wireless data communication terminal can directly communicate with another wireless data communication terminal to exchange voice or data without being connected to the Internet through a VoIP server.

The wireless repeaters 213, 223, 233, and 243 store an address for peer-to-peer mode communication during a wireless data communication terminal period using a wireless LAN and unit cell information to which the corresponding wireless data communication terminal belongs. The location information of the wireless data communication terminal stored in the wireless repeaters 213, 223, 233, and 243 is updated based on learning or mobile IP. In addition, when the power of the new wireless data communication terminal is turned on in the unit cell, the wireless repeater registers and authenticates the peer-to-peer mode communication address of the wireless data communication terminal. In addition, the wireless repeaters 213, 223, 233, and 243 may not be able to perform peer-to-peer mode communication when the distance between the two wireless data communication terminals 290 is out of a range capable of performing peer-to-peer mode communication. When the two wireless data communication terminals are located in different unit cells, the data is relayed in the middle and transferred to the other wireless data communication terminal. In addition, the wireless repeater authenticates a wireless data communication terminal having the authority to receive peer-to-peer mode communication service, and when a calling message is detected, the wireless repeater searches for the called wireless data communication terminal and sends the corresponding calling message to the called wireless data communication terminal. It transmits to a unit cell and performs a function of relaying data exchanged between two wireless data communication terminals.

The wireless data communication terminal operates in a peer-to-peer communication mode or an internet communication mode. Switching between modes is done manually or automatically. In case of caller's wireless data communication terminal, it is initialized to internet communication mode and peer-to-peer mode communication is requested if the user requests to switch to peer-to-peer mode communication mode or the call number entered by the user is an address for peer-to-peer mode communication. It automatically switches to mode. In the case of the destination wireless data communication terminal, if the incoming message is initialized to the Internet communication mode and the incoming message is a peer-to-peer incoming message, it is automatically switched to the peer-to-peer mode communication mode, and the peer-to-peer mode communication with the calling-party wireless data communication terminal is performed. To do this.

When a message is sent from any wireless data communication terminal, the message is input to both the access point and the wireless repeater.If the message is in peer-to-peer mode communication mode, the access point ignores the message and the wireless repeater receives and processes the message. If the message is in the Internet communication mode, the access point receives the message and processes it, and the wireless repeater ignores it.

Wireless repeaters are wired or wirelessly connected and communicate with each other using a bridge or router protocol. The wireless repeater stores the address of the wireless data communication terminal included in the unit cell, and if the peer-to-peer mode communication address of the receiving wireless data communication terminal included in the calling message is not registered in the current unit cell, the calling message is transmitted. Relay to neighboring wireless repeaters. The wireless repeater authenticates the wireless data communication terminal so that the peer-to-peer mode communication service can be used only between the authorized wireless data communication terminals, or all wireless data communication having an address for wireless LAN-based peer-to-peer mode communication regardless of authentication. The terminal may enable the peer-to-peer mode communication service.

In the embodiment of Fig. 2, although the access point and the wireless repeater of the Internet manage the same unit cell area, the unit cells controlled by the Internet access point and the wireless repeater do not necessarily coincide with each other. That is, the unit cell managed by one access point and the unit cell managed by one radio repeater need not coincide with each other for peer-to-peer mode communication between terminals for Internet access. Unless stated otherwise in this specification, a unit cell means an area in which one wireless repeater can communicate with a wireless data communication terminal equipped with a wireless LAN module, that is, a peer-to-peer mode communication unit cell. In addition, when the access point and the wireless repeater manage the same unit cell, the access point may be configured to simultaneously perform the function of the wireless repeater.

3 is an internal configuration diagram of a wireless data communication terminal equipped with a wireless LAN module according to the present invention, which comprises a general data communication terminal 300 and a wireless LAN module 400.

The data communication terminal 300 transmits and receives a transmission / reception processing unit 330, a central processing unit 340, a memory unit 350, a key input unit 360, a display unit 370, a microphone / speaker 380, and a battery 390. Equipped.

The transmission and reception processing unit 330 is responsible for the actual transmission and reception of data in the baseband.

The central processing unit 340 includes a central processing unit (CPU) 341, a protocol processing unit 342 for processing various Internet protocols, and a voice codec unit (CODEC) 343 for coding / decoding voice. The central processing unit 340 is connected to the memory unit 350, the key input unit 360, the display unit 370, the microphone / speaker 380, and the battery 390.

The memory unit 350 may include a ROM in which a program required by the central processing unit 340 is embedded, a non-volatile memory (NVM: Flash memory or EEPROM) for storing various telephone numbers and names, and the like. It consists of RAM that temporarily stores and processes data generated during program control. In addition, the non-volatile memory maps and stores the peer-to-peer mode communication addresses of the wireless data communication terminals capable of peer-to-peer mode communication and the internet communication.

The key input unit 360 has a key matrix structure (not shown), includes a numeric key for dialing and various function keys, generates a key input signal corresponding to a key input by a user, and outputs the key input signal to the central processing unit 340. do. The display unit 370 uses an LCD (liquid crystal display device), for example, and displays the state and operation process of the data communication terminal under the control of the central processing unit 340. In addition, the voice input through the microphone is coded and transmitted to the central processing unit 340, and the data transmitted through the central processing unit 340 is decoded and transmitted through the speaker.

The wireless LAN module 400 includes an RF processor 410, a baseband processor 420, and a link controller 430. The baseband processing unit 420 and the link control unit 430 are connected to the central processing unit 340 of the data communication terminal, and exchange control commands and the results and user transmission and reception data. In this case, the wireless LAN module and the data communication terminal can use RS232C, USB, and standard PC interface, and communicate using command / response and data packets.

The RF processing unit 410 of the wireless LAN module 400 modulates and amplifies a wireless transmission data packet generated by the baseband processing unit 420 to a set frequency band, transmits it, or suppresses noise of a received signal and lowers the low frequency band. Lower to apply to the baseband processor 420.

The baseband processor 420 converts the packet by adding an access code and a header to various data packets applied from the central processing unit 340 of the data communication terminal, and converts the packet into a predetermined data packet signal for wireless transmission. Wireless transmission through the frequency band set by the processor 410, converts the signal received through the RF processor 410 to a data packet for transmission to the central processing unit 340, and delivers it to the data communication terminal (300).

The link control unit 430 controls the wireless LAN module 400 based on a command of a command packet applied from the central processing unit 340, and receives the request and result information received through the baseband processing unit 420. Forward to 340.

4 is a block diagram illustrating an internal configuration of a wireless repeater according to the present invention. The wireless repeater includes a receiving module 51 for receiving data from a wireless data communication terminal located in a unit cell under its control or a wireless repeater located in an adjacent unit cell, and a wireless data communication terminal located in a unit cell under its control. When the peer module 52 transmits data to the wireless repeater located in the unit cell and the peer-to-peer mode communication authority authentication request is input from the wireless data communication terminal through the receiving module 51, the communication authority is checked and the result is checked. An authentication module 53 for transmitting to the wireless data communication terminal through the transmission module 52 and a relay or router module 54 for amplifying and relaying data received through the reception module 51 and transmitting the data through the transmission module 52. ). The authentication module 53 and the relay or router module 54 are modules belonging to the collective control unit.

The wireless repeater registers the wireless data communication terminal and authenticates communication authority by using the peer-to-peer mode communication address of each wireless data communication terminal, and stores location information of a unit cell in which the wireless data communication terminal is located.

In addition, the wireless repeater stores the address and location information for peer-to-peer mode communication of the wireless data communication terminal transmitted from the wireless repeater that manages other unit cells, and updates this information based on learning or mobile IP.

Hereinafter, the operation of a wireless data communication terminal period peer-to-peer mode communication system using a wireless LAN according to the present invention configured as described above will be described in detail with reference to the accompanying drawings.

The wireless data communication terminal period peer-to-peer mode communication service using the wireless LAN is managed by the central processing unit 340 of the wireless data communication terminal. FIG. 5 is a flowchart illustrating a WLAN-based peer-to-peer mode communication service method in a central processing unit of a wireless data communication terminal, and FIG. 6 is a WLAN-based peer-to-peer mode communication service method in a wireless repeater. An operational flow diagram is shown.

First, when the power of the wireless data communication terminal to receive the wireless LAN-based peer-to-peer mode communication service in the single cell / multi-cell is initially turned on, the corresponding wireless data communication terminal is initialized (S501), and wireless in the unit cell where it is located. The wireless repeater managing the access point or the unit cell in which the access point is located is authenticated (S502). The process of the wireless data communication terminal authenticating from the wireless access point is a process required for the wireless data communication terminal to perform the Internet communication mode, which is a general description, and thus detailed description thereof will be omitted.

As shown in FIG. 6, when the authentication request is input from the wireless data communication terminal (S601), the wireless repeater performs steps S602 to S604 to authenticate the wireless data communication terminal.

That is, it is checked whether or not the wireless data communication terminal is registered (S602). If the terminal is already registered, the communication authority is authenticated (S603). If not, the terminal terminates without authenticating the communication authority (S604). At this time, the wireless repeater has not only the wireless data communication terminal registered in the unit cell which it has jurisdiction over, but also has information about the wireless data communication terminal registered in the other unit cell or accesses and authenticates the wireless data communication terminal registered as a peer-to-peer service target. Thus, even if the wireless data communication terminal moves between the unit cells, it is possible to use the peer-to-peer mode communication service. In addition, all radio repeaters broadcast subscribers registered in their unit cells at regular intervals so that other radio repeaters use the information.

That is, the wireless repeater has the peer-to-peer mode communication address information of the peer-to-peer mode communication service target wireless data communication terminal, so that the wireless data communication terminal period communication can be performed in the same unit cell or another unit cell environment.

Next, the user of the wireless data communication terminal, which has authenticated the peer-to-peer mode communication from the wireless repeater, inputs an address for peer-to-peer mode communication of the wireless data communication terminal for voice / data communication using a key input unit as shown in FIG. 5. When the call button is pressed (S503), the central processing unit of the wireless data communication terminal determines that the call is in peer-to-peer mode communication mode when the number of input address digits is smaller than the threshold value (S504), and transmits a call message through the WLAN module. do. In addition, if the source and destination IP addresses belong to the same subnet, it operates in peer-to-peer communication mode.

Referring to the process of transmitting the call message in more detail, the baseband processor of the WLAN module processes the peer-to-peer call message and transmits it through the RF processor (S505). When the peer-to-peer call message is transmitted from the calling wireless data communication terminal, the peer-to-peer calling message is transmitted to all wireless data communication terminals and wireless repeaters of the unit cell in which the corresponding calling wireless data communication terminal is located.

When the called wireless data communication terminal having the peer-to-peer mode communication address included in the calling message is located in the same unit cell as the calling terminal, the calling message is input to the wireless LAN module of the called wireless data communication terminal. The central processing unit of the called wireless data communication terminal sends a 'busy' signal to the corresponding calling wireless data communication terminal through the wireless LAN module when it is busy, and receives a peer-to-peer call when it is idle. The response is sent back to the calling wireless data communication terminal through the WLAN module. At this time, the call forwarding response message includes transmission path information that the message passes through.

Meanwhile, as shown in FIG. 6, a peer-to-peer calling message is input from the calling-party wireless data communication terminal to the receiving-party peer-to-peer mode included in the calling message. If the communication address is a wireless data communication terminal registered to the user (S606), since the peer-to-peer mode communication can be performed directly between the calling wireless data communication terminal and the called wireless data communication terminal, the terminal ends immediately.

5, when the peer-to-peer call reception response is received from the called-party wireless data communication terminal as shown in FIG. 5 (S506), the transmission path is recorded (S507), and the calling-side wireless data communication terminal is recorded. And a communication path according to a corresponding transmission path is connected between the caller and the receiving wireless data communication terminal (S508).

When the communication path is connected, the voice call or data communication using the wireless LAN module is performed in the calling wireless data communication terminal and the called wireless data communication terminal, and the connection is released after the call (S509).

On the other hand, when the called wireless data communication terminal is located in a different unit cell than the calling wireless data communication terminal, the wireless repeater receives a peer-to-peer call message as shown in FIG. If the data communication terminal has the communication authority and the destination peer-to-peer mode communication destination address included in the calling message is not the wireless data communication terminal registered to the user (S606), the peer-to-peer call message is the destination wireless data. The called party's wireless data communication terminal transmits to the wireless repeater that manages the unit cell registered to be transmitted to the communication terminal (S607), and the destination address for the called party's peer-to-peer mode communication is registered to the wireless data communication terminal. In the case of communicating between two wireless data communication terminal periods in the cell (S610).

In this case, the calling wireless data communication terminal and the called wireless data communication terminal may not be adjacent unit cells, which are then transmitted through a plurality of wireless repeaters. The central processing unit of the called wireless data communication terminal receiving the calling message returns a 'busy' signal to the corresponding calling wireless data communication terminal when it is in a busy state, and receives a peer-to-peer call when it is idle. The response is returned to the calling wireless data communication terminal.

The wireless repeater transmits a call reception response message of the called wireless data communication terminal to the calling wireless data communication terminal (S608). At this time, the incoming call response message includes the transmission path information passed by the corresponding message.

When the calling wireless data communication terminal receives a peer-to-peer call incoming response from the called wireless data communication terminal, the calling wireless data communication terminal records the transmission path, and according to the corresponding transmission path between the calling wireless data communication terminal and the called wireless data communication terminal. The communication path is connected so that voice call or data communication using the wireless LAN module is performed during the calling wireless data communication terminal and the called wireless data communication terminal.

That is, the calling wireless data communication terminal and the called wireless data communication terminal communicate with each other in peer-to-peer mode. In this case, the wireless repeater relays data transmitted / received between the two wireless data communication terminals to the other wireless data communication terminal. To perform the function (S609).

Meanwhile, as shown in FIG. 5, the calling party's wireless data communication terminal transmits a peer-to-peer call message and waits for a call answering response to the peer-to-peer call message. The calling message is repeatedly transmitted (S511 and S512). Then, if the number of retransmissions of the calling message is greater than the threshold value, the central processing unit of the calling wireless data communication terminal searches for the Internet communication IP address or telephone number that matches the corresponding peer to peer mode communication address in the memory unit, The called party wireless data communication terminal is called in the Internet communication mode using the IP address or the telephone number (S513).

In addition, when a user initially enters a phone number for Internet communication or the number of digits of the input number is larger than a threshold value, the user immediately communicates in the Internet communication mode using the phone number. In addition, it operates in peer-to-peer communication mode when the source and destination IP addresses belong to the same subnet. Otherwise, it operates in internet communication mode.

If any wireless data communication terminal registered with the first wireless repeater is authenticated peer-to-peer communication from a first wireless repeater located in an arbitrary first unit cell and moves from the first unit cell to the second unit cell, the first unit cell. Normal registration and roaming schemes are applied between the second unit cell and the second unit cell so that information about the corresponding wireless data communication terminal is registered in the second radio repeater that manages the second unit cell.

In addition, the information indicating that the wireless data communication terminal is located in the second unit cell is transmitted to all the wireless repeaters capable of peer-to-peer communication, thereby allowing peer-to-peer in a peer-to-peer communication area even if the wireless data communication terminal moves between unit cells. The communication service can be provided.

While the invention has been described above based on the preferred embodiments thereof, these embodiments are intended to illustrate rather than limit the invention. It will be apparent to those skilled in the art that various changes, modifications, or adjustments to the above embodiments can be made without departing from the spirit of the invention. Therefore, the protection scope of the present invention will be limited only by the appended claims, and should be construed as including all such changes, modifications or adjustments.

According to the wireless data communication terminal period peer-to-peer mode communication service apparatus using the wireless LAN of the present invention as described above, wireless data communication terminals equipped with a wireless LAN module are not connected to the Internet within a certain range. Since communication can be performed directly in a peer-to-peer manner, call costs are reduced and call quality is improved.

Claims (19)

An internet access point wirelessly connected to a plurality of wireless data communication terminals including a wireless LAN module, and a router for connecting the plurality of access points to the internet, thereby providing an internet communication service to the wireless data communication terminal, A communication service system for providing peer-to-peer mode communication using a wireless LAN without passing through the Internet during a wireless data communication terminal period in which an address for two-peer mode communication is assigned, A plurality of wireless repeaters connected through the wireless data communication terminal and a wireless LAN module and transmitting and receiving signals to each other, and managing peer-to-peer mode communication between wireless data communication terminals located in a unit cell; The wireless repeater may include an authentication module for authenticating peer-to-peer mode communication authority of a wireless data communication terminal which is located in the unit cell and directly communicates with the wireless repeater, and peer-to-peer mode communication from the wireless repeater and another wireless repeater. Storage means for storing address information for peer-to-peer mode communication of the authorized wireless data communication terminal and unit cell information in which the authentication wireless data communication terminal is located; between the wireless data communication terminal and another wireless repeater located in the unit cell; A relay module for relaying data between two other wireless repeaters, a receiving module for receiving data from a wireless data communication terminal located in the unit cell or an adjacent other wireless repeater, and a wireless data communication terminal or adjacent other located within the unit cell Send data to the wireless repeater The wireless data communication terminal term peer-to-peer mode the communication service system using a wireless LAN, characterized in that including the transmitter module. The method of claim 1, The wireless repeater, Uses a bridge or router protocol to communicate with other wireless repeaters in a wired or wireless manner, Periodically transmitting the peer-to-peer mode communication address of the wireless data communication terminal for which the peer-to-peer mode communication authority has been authenticated and the unit cell information where the wireless data communication terminal is located, to other wireless repeaters; When data is received from the wireless data communication terminal or the other wireless repeater, the wireless repeater that searches for a wireless repeater that manages a unit cell in which the called-party wireless data communication terminal is located and relays the data to the found wireless repeater Peer-to-peer mode communication service device for a data communication terminal period. The peer-to-peer mode communication service device of claim 1, wherein the access point and the wireless repeater are integrally formed. The method of claim 1, The wireless data communication terminal, The peer-to-peer mode of a wireless data communication terminal using a wireless LAN, which is initialized to an internet communication mode and determines whether peer-to-peer mode communication is performed by comparing the number of digits of the called party's telephone address input from the user with a threshold value. Communication service device. The method of claim 1, The wireless data communication terminal, Initializing in the Internet communication mode, if the destination IP address input by the user belongs to the same subnet, the peer-to-peer mode communication is performed. Service device. The method of claim 1, The wireless data communication terminal, Peer-to-peer mode communication service device for a wireless data communication terminal using a wireless LAN, characterized in that it comprises a drive software for driving the wireless LAN module. delete delete An internet access point wirelessly connected to a plurality of wireless data communication terminals including a wireless LAN module, and a router for connecting the plurality of access points to the Internet, thereby providing an internet communication service to the wireless data communication terminal, and a unit It includes a plurality of wireless repeaters for peer-to-peer mode communication of wireless data communication terminals located in a cell, and the peer-to-peer mode using a wireless LAN without going through the Internet in the period of a wireless data communication terminal assigned an address for peer-to-peer mode communication. A peer-to-peer mode communication service method in a communication service system providing communication, the method comprising: An authentication step of authenticating, by the wireless repeater, a peer-to-peer mode communication authority of a wireless data communication terminal capable of directly communicating with the wireless repeater; Authentication terminal information in which the wireless repeater shares the peer-to-peer mode communication address of the wireless data communication terminal in which the peer-to-peer mode communication authority is authenticated in the wireless repeater and another wireless repeater and the unit cell information in which the authentication wireless data communication terminal is located. A sharing step; When a call message for calling the peer-to-peer mode communication address of the called-party wireless data communication terminal is input from another wireless repeater or a repeating wireless repeater that controls the unit cell in which the calling-party wireless data communication terminal or the calling-party wireless data communication terminal is located. The wireless repeater identifies the unit cell in which the called wireless data communication terminal is located and tells the other wireless repeater or the repeater wireless repeater that manages the called cell or the unit cell in which the called wireless data communication terminal is located. A call message delivery step of delivering a call message; When an incoming call response to the calling message is received from another wireless repeater or a repeating wireless repeater that manages a unit cell in which the called party wireless data communication terminal or the called party wireless data communication terminal is located, the wireless repeater transmits the called party radio. Incoming call response to the calling message is transmitted to another wireless repeater or a repeating wireless repeater in charge of a unit cell in which a data communication terminal or the source wireless data communication terminal is located, and the source wireless data communication terminal and the destination wireless data are transmitted. Communication terminal period A wireless data communication terminal period using a wireless LAN, comprising a data transmission and reception step of setting a communication path to enable peer-to-peer mode communication between the calling wireless data communication terminal and the receiving wireless data communication terminal period. Peer to Peer Mo Way communications services. delete delete delete The method of claim 9, The calling party wireless data communication terminal, If the incoming call response to the calling message is not returned from the called-side wireless data communication terminal so that a threshold time elapses after sending the calling message, it switches to the Internet communication mode to the called-side wireless data communication terminal through the Internet. A peer-to-peer mode communication service method for a wireless data communication terminal period using a wireless LAN, characterized by attempting a call connection. The method of claim 13, The calling party wireless data communication terminal, If the incoming call response to the calling message is not returned from the called-party wireless data communication terminal after a predetermined time after sending the calling message, the calling message is retransmitted until the number of retransmissions reaches a threshold value. If the number of retransmissions of the calling message exceeds the threshold, it converts to the Internet communication mode and attempts to connect the call to the called party's wireless data communication terminal through the Internet. Service method. delete delete delete delete The method of claim 9, The calling party wireless data communication terminal and the called party wireless data communication terminal, The peer-to-peer mode communication service method for a wireless data communication terminal period using a wireless LAN, characterized in that for setting the peer-to-peer mode communication path using the path to which the incoming call response is transmitted.