KR100547595B1 - Method for transferring message of local network user terminals in off-line status messenger - Google Patents

Abstract

The present invention relates to a method for delivering a message between local network user terminals in an offline messenger. The method according to the present invention generates a broadcasting packet to be transmitted to nodes connected to a local network (a)-the broadcasting packet. Includes at least one of a predetermined destination address, address information of a corresponding user terminal, and name information in a local network, to enable broadcasting in the local network; B) broadcasting the generated broadcasting packet to other user terminals of a local network, and receiving a response packet from the at least one other user terminal in response to the broadcasting packet; Address information of the user terminal receiving the casting packet and name information in the local network; (C) registering another user terminal of the local network that has transmitted the received response packet as a conversation partner; (D) performing instant message transmission and reception using address information of other user terminals of the local network registered as the conversation partner. According to the present invention, it is possible to perform messenger communication with user terminals connected to a local network even without a user login process, and automatically register members sharing a local network as a contact.

Messenger, offline, local network

Description

 Method for transferring messages between local network user terminals in offline messenger and recording medium therefor {Method for Transferring Message of Local Network User Terminals in Off-line Status Messenger}

1 is a diagram illustrating a method of transmitting a message between local network terminals in a messenger in an offline state and a system to which a recording medium therefor is applied, according to an exemplary embodiment of the present invention.

Figure 2 is a flow chart illustrating the overall flow of the method for transferring messages between local network terminals in the offline messenger according to an embodiment of the present invention.

3 is a block diagram showing the module configuration of a messenger according to an embodiment of the present invention.

4 is a diagram illustrating an example of a messenger screen capable of transmitting and receiving a message in a local network in an offline state according to an exemplary embodiment of the present invention.

5 is a flowchart illustrating a process of registering a messenger user between user terminals of a local network by a messenger according to the present invention according to an embodiment of the present invention.

6A is a diagram illustrating a field configuration of a UDP broadcasting packet for notifying program execution information according to an embodiment of the present invention.

6B is a diagram illustrating a field configuration of a UDP broadcasting response message according to an embodiment of the present invention.

7 is a flowchart illustrating a process of delivering state change information to user terminals of a state local network in an offline state according to an exemplary embodiment of the present invention.

8 is a flowchart illustrating a process of transmitting a message in an offline messenger according to an exemplary embodiment of the present invention.

9 is a diagram showing the field configuration of a message packet according to an embodiment of the present invention.

The present invention relates to a messenger for instant message delivery, and more particularly, to a messenger communication method and a recording medium for enabling instant instant message transmission and reception in a space such as an office connected to a local network.

The use of messenger, which functions to send and receive instant messages, continues to increase, and has now become one of the main means of communication with telephones and mobile phones. Since a messenger transmits a message through a computer, it is a communication means having the advantage of easily exchanging document files and picture files in real time in addition to general text messages.

Such a messenger can be useful not only for communication between acquaintances, but also for handling tasks in the office. Many offices use messengers for handling tasks, and messengers for business use have been released.

Messenger can send the necessary message immediately, and even if the user cannot check the message immediately, the sent message remains on the computer so that it can be checked later. It is expected to increase further.

However, there is a problem that a user must go through a very cumbersome procedure in order to perform such convenient messenger communication.

Since the messenger communicates in such a manner that the server of the messenger system relays the message packet, a login process for accessing the messenger system must be performed before use. In addition, in order to communicate with a specific party, the user must enter the e-mail address or ID of the other party to register as a conversation partner.

Therefore, in order to communicate with members of the office, no matter how many office members there are, it is necessary to enter each e-mail address or ID to register as a contact. This hassle prevents messenger activation in the office. It is acting as a factor.

Moreover, even though the office space is connected to the local network so that network communication is possible regardless of the state of the external network, when using the conventional messenger, the messenger system of the external network always relays messages. When the communication with the external network is interrupted, there was an impossible problem using messenger.

In order to solve the above problems of the prior art, the present invention proposes a messenger communication method capable of communicating with user terminals connected to a local network without a user login process and a recording medium therefor.

Another object of the present invention is to propose a messenger communication method and a recording medium therefor, which can automatically register members sharing a local network as a chat partner even without registering members sharing the local network as a chat partner.

It is still another object of the present invention to propose a messenger communication method and a recording medium for the messenger communication between users of a local network even if they cannot access a messenger system connected to an external network such as the Internet due to a communication failure.

According to an aspect of the present invention in order to achieve the above object, as a message transfer method between the local network user terminals in the offline messenger, generating a broadcasting packet to be transmitted to the nodes connected to the local network ( a)-the broadcasting packet includes at least one of a preset destination address for allowing broadcasting in the local network, address information of the corresponding user terminal, and name information in the local network; B) broadcasting the generated broadcasting packet to other user terminals of a local network, and receiving a response packet from the at least one other user terminal in response to the broadcasting packet; Address information of the user terminal receiving the casting packet and name information in the local network; (C) registering another user terminal of the local network that has transmitted the received response packet as a conversation partner; Provided is a method for delivering a message between local network user terminals in an offline messenger, comprising the step (d) of performing instant message transmission and reception using address information of other user terminals of the local network registered as the conversation partner.

The present invention may further include generating and transmitting the response packet including address information and name information in the local network to the corresponding user terminal when receiving the broadcasting packet from another user terminal in a local network. Can be.

Preferably, the broadcasting packet is a UDP broadcasting packet.

The name information in the local network is preferably a workgroup and name information in the local network of the user terminal registered in the operating system.

The address information may include at least one of an IP address and a MAC address of the corresponding user terminal.

Preferably, the response packet is a UDP packet having an address of a user terminal transmitting the broadcasting packet as a destination address.

In addition, the present invention includes the steps of monitoring whether the status of the messenger user is changed by the user request or the occurrence of a preset event; And when the state is changed, generating a broadcasting packet informing of the state change and transmitting the generated packet to user terminals of the local network.

Step (d) may include determining whether a type of a message to be transmitted is a text transmission file or a file transmission message; When the message to be transmitted is a text transmission message, generating a UDP message packet having the terminal address of the conversation partner as a destination address and transmitting the UDP message packet to the terminal of the conversation partner; And when the message to be transmitted is a file transfer message, generating a TCP message packet having the terminal address of the conversation counterpart as a destination address and transmitting it to the terminal of the conversation counterpart.

According to another aspect of the present invention, a combination of instructions for instant message communication between user terminals connected to a local network in a messenger offline state is tangibly embodied and is a recording medium on which a program can be read by an electronic information processing apparatus. A user information extraction module for extracting address information of the user terminal and name information from the local network when the messenger program is executed; A broadcasting message generating module for generating a broadcasting packet message including address information extracted from the user information extracting module and name information on a local network, and transmitting the generated packet message to nodes of a local network in a broadcasting manner. The broadcasting packet includes a preset destination address to enable broadcasting within the local network; Registering network user information for receiving a response packet from other user terminals of the local network receiving the broadcasting packet message, and registering at least one other user terminal connected to the local network as a contact using information included in the response packet. A module, wherein the response packet includes at least address information of a user terminal receiving the broadcasting message and name information in a network; A recording medium is provided which records a program including a message transmission / reception module for controlling message transmission and reception between user terminals in a local network registered by the network user information registration module.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the message transfer method between the local network terminals and the recording medium therefor in the offline messenger according to the present invention.

1 is a diagram illustrating a method of transmitting a message between local network terminals and a system to which a recording medium therefor is applied in an offline messenger according to an exemplary embodiment of the present invention.

Referring to FIG. 1, a system according to an exemplary embodiment of the present invention includes a plurality of user terminals 100, 102, 104, and 106 connected through a local network and a messenger system 108 connected to an external network. It may include.

The user terminals 100, 102, 104 and 106 are provided with a messenger program according to the present invention. In the online mode in which the user logs in, the messenger program according to the present invention functions to relay message transmission and reception between users registered as messengers in a messenger like a normal messenger. In addition, the messenger program according to the present invention enables messenger communication between users connected to the local network even when the messenger program is not logged in to the messenger or cannot log in to the messenger system 108 due to blocking of connection with an external network. Function.

In the case of the conventional messenger, message delivery by the messenger is controlled by the messenger system. Therefore, it is not possible to send and receive messages by a messenger in a state where it is not possible to log in to the messenger system due to not logging in to the messenger system or blocking connection to an external network. In particular, even if the connection with the external network is blocked, since the local network is connected, although the message can be transmitted and received between the local terminals, since the messenger program relays the message only through the messenger system, the message cannot be transmitted or received.

According to the present invention, terminals of a local network on which a messenger is installed find terminals capable of messenger communication without passing through a messenger system by the operation of the installed messenger, and a messenger installed in the terminal is a node capable of communicating the found terminals. Register with A method of finding a terminal of a local network on which a messenger according to the present invention is installed will be described later in detail through a separate drawing.

Therefore, according to the present invention, by detecting communication between the user terminal (100, 102, 104, 106) installed a messenger through the local network to find a terminal, and through the relay of the messenger system to find the local network Communicate directly via

The user terminal may include not only a general PC but also a digital data processing device capable of communicating via a network such as a PDA, a notebook computer, a mobile phone, and a messenger program.

In FIG. 1, the external network may include both a wired network such as an internet network and a private network, as well as a wireless network such as a mobile communication network and a wireless internet network. Also, the local network may include a local area network used in an office, such as a local area network (LAN), and nodes of the local network may be connected through a leased line or wirelessly connected using an AP and a wireless LAN card. will be.

2 is a flowchart illustrating an overall flow of a method for transferring a message between local network terminals in an offline messenger according to an exemplary embodiment of the present invention.

Although FIG. 2 illustrates message transmission and reception between two terminals of user terminal 1 and user terminal 2 belonging to a local network, this is for convenience of description, and the operation of FIG. 2 includes a plurality of user terminals belonging to a local network. It will be apparent to those skilled in the art that the process can be performed in between.

Referring to FIG. 2, first, a user of user terminal 1 executes a messenger program installed in user terminal 1 (step 200).

Typically, when a messenger program is executed, a login operation with a messenger system is performed according to a user's login request or automatic login setting. If the user is not connected to the messenger system by such a login operation, messenger communication with other users is impossible. However, the messenger according to the present invention transmits a message indicating that the messenger program has been executed to terminals connected to the local network regardless of whether or not they are logged in (step 202).

According to an embodiment of the present invention, a program execution message transmitted to user terminals connected to a local network is transmitted to all user terminals connected to the local network in a broadcasting form. Unlike unicasting, in which a packet is transmitted to a node of a specific address, broadcasting is a transmission method that delivers a packet to all nodes connected to a specific network. Broadcasting may be implemented in a variety of ways, and preferably User Datagram Protocol (UDP) broadcasting may be used. The present invention is not limited to the delivery of program execution information messages in a broadcast manner, and other transmission schemes, for example multicasting, may be used.

The program execution message includes address information of the user terminal 1 executing the program and name information on the local network. The name on the local network can be edited by each user through the operating system and is usually designated by the user's name.

In FIG. 2, the user terminal 2 is a terminal connected to a local network like the user terminal 1, and receives a program execution message transmitted by the messenger of the user terminal 1. If the messenger according to the present invention is installed in the user terminal 2, the program execution message of the user terminal 1 can be recognized, and response information is transmitted (step 204). As described above, the program execution information message is transmitted to not only user terminal 2 but also all terminals connected to the network in the form of broadcasting.

At the same time as the response information is transmitted, the user of user terminal 1 is registered as a friend list of the messenger. The messenger of the user terminal 2 registers the user of the user terminal 1 to the friend list by using the address information of the user terminal 1 and the name information on the local network included in the program execution message.

The response message to the program execution message includes address information of user terminal 2 and name information of the local network of user terminal 2.

The response message is a message transmitted to an address included in the program execution message, and is preferably transmitted in unicasting form instead of being transmitted to all user terminals in a local network in a broadcasting form like a program execution message.

After receiving the response message, the messenger of user terminal 1 registers the user of user terminal 2 to the contact list using the address information and the network user name information included in the response message (step 206). The response message is transmitted from all the user terminals that have received the program execution message, and the messenger of the user terminal 1 registers the user terminal corresponding to all the received response messages in the contact list.

When the user terminal 1 and the user terminal 2 is registered as a conversation partner in each messenger, the user terminal 1 and the user terminal 2 transmits and receives a message by directly sending a message packet to the received address (step 208).

Due to the above operation, even if the user does not log in or access the messenger system of the external network, the messenger communication between the users connected to the local network is possible.

3 is a block diagram showing the module configuration of a messenger according to an embodiment of the present invention.

Referring to FIG. 3, a messenger according to an embodiment of the present invention may include an online message processing module 300 and an offline message processing module 302, and the online message processing module 300 may include a login management module 310. ), A message transmission / reception module 312 and a state information management module 304, and the offline message processing module 302 includes a user information extraction module 350, a broadcasting message generating module 352, and a broadcasting message response module. 354, a network user information registration module 356, a state information management module 358, and a message transmission / reception module 360.

In FIG. 3, the login management module 310 of the online message processing module 300 functions to process a login request of a user. When the user requests a login for accessing a messenger system of an external network, the login management module 310 sends login request information including a user's ID and password information to a login management server (generally, a gateway monitoring server) of the messenger system. ), And receives response information about a login request from a login management server. When a normal login request is made, status information about the contacts in the messenger list is received, and the contact list including the status information is displayed on the messenger.

The message transceiving module 312 transmits an instant message sent by a user to a message queue server of a messenger system after logging in is completed, and receives and displays a message transmitted through an instant message server of the messenger system. The message transceiving module 312 in the online message processing module 300 transmits an instant message to a specific server of a messenger system, such as a message queue server, and relays the transmitted message to a designated conversation counterpart.

The state information management module 314 transmits the state change information when there is a change in the state information of the messenger user. For example, when the user changes to the away state by not using the computer for a preset time, the state information management module 314 transmits the information that the change has been made to the away state. The state information management module 314 transmits the state information to a predetermined server of the messenger system, and the server transmits the state change information to users who register a user whose state has changed as a contact.

In the offline message processing module 302, the user information extraction module 350 functions to extract name information and address information in a network of a terminal on which a messenger is installed. The network name information of the terminal includes a work group to which the user terminal belongs in the local network and name information input by the network operator or the user for the corresponding user terminal. The user information extraction module 350 extracts network name information of the user terminal through communication with an operating system installed in the user terminal. For example, in the case of a Windows operating system, the netwkstagetinfo () function included in netapi21.dll is used. Network name information may be extracted.

In addition, the user information extraction module 350 extracts address information of the user terminal. According to a preferred embodiment of the present invention, the address information preferably includes not only IP address information but also MAC address of the user terminal. In a local network that shares an IP or another specific type of local network, a terminal cannot be identified by an IP address alone. In this case, it is preferable to include a MAC address in the address information. The MAC address can be found by using the netbios () function in a typical Windows operating system.

When the user executes the messenger program, the broadcasting message generation module 352 generates a broadcasting message including information indicating that the program has been executed and transmits the broadcasting message to user terminals connected to the local network. The broadcast message generation module 352 generates a broadcast message including the user information extracted by the user information extraction module 350.

According to a preferred embodiment of the present invention, the broadcasting message generating module 352 generates a UDP broadcasting packet and transmits it to the user terminals of the local network. UDP broadcasting includes limited broadcasting, net-specified broadcasting, subnet-specified broadcasting, all subnet-specified broadcasting, etc., and this kind of broadcasting may be used in various ways depending on the type of local network. to be.

According to a preferred embodiment of the present invention, a limited broadcasting method is used, and the limited broadcasting is a form of addressing a UDP broadcasting packet address 255.255.255.255, which does not allow forwarding and UDP to a limited local network. Broadcasting method for transmitting a packet.

For example, on Unix systems, you may be able to perform limited broadcasts with the command combination sun% ping 255.255.255.255 / usr / etc / ping: unknown host 255.255.255.255.

When the broadcasting message response module 354 receives a broadcasting message indicating that a messenger program has been executed from another user terminal of a local network, the broadcasting message response module 354 generates a response message and transmits the response message to the corresponding user terminal. As described above, the response message generated by the broadcasting message response module 354 also includes network name information and address information of the received user terminal. The broadcasting response message is preferably a UDP packet, but it will be apparent to those skilled in the art that the broadcast response message may be transmitted in a TCP packet.

When the network user information registration module 356 receives a UDP broadcasting message or a response message for broadcasting from another user terminal of the local network, the network user information registration module 356 may use the other user terminal information included in the above-mentioned messages to determine the corresponding user terminal. Registers a user as a contact. In the case of a general messenger, a contact registration request information including a mail address or ID of a person to be registered as a contact is transmitted to a messenger system, which is sent to the user, and the user accepts the request information. In the offline mode of the messenger of the present invention, the contact registration is performed by transmitting a packet through broadcasting and receiving response information in the offline mode of the messenger of the present invention.

The state information management module 358 transmits state change information to other user terminals in the local network when the state of a user who uses a messenger in an offline state, such as a vacant state, is registered and registers state change information of another user. Function. According to an embodiment of the present invention, the state information management module 358 may transmit the state information to other user terminals in the local network using a UDP broadcasting message including the state information. According to another embodiment of the present invention, state change information may be delivered through UDP or TCP packets to addresses of respective user terminals registered as conversation partners.

The message transceiving module 360 controls the instant message transceiving between user terminals connected to the local network in a messenger offline state. Unlike sending and receiving messages online, the message sending and receiving module 360 transmits an instant message directly to a user terminal of a specific conversation partner.

5 is a flowchart illustrating a process of registering a messenger user between user terminals of a local network by a messenger according to an embodiment of the present invention.

Although FIG. 5 also illustrates a case where a messenger user is registered through a communication process between user terminal 1 and user terminal 2, the procedure in FIG. 5 may be performed for all user terminals connected to a local network.

In FIG. 5, user terminal 1 is a terminal of a user who has not yet executed a messenger program, and user terminal 2 is a terminal of a user who is connected to a local network and has already executed a messenger program.

Referring to Fig. 5, first, a user of user terminal 1 executes a messenger program according to the present invention (step 500). When the messenger program is executed, the messenger extracts name information from the network of the user terminal 1 regardless of whether the user logs in with the messenger system (step 502). As described above, name information on the network of the user terminal may be extracted through communication with the operating system or a specific command input, and a communication method or command with the operating system may be variously changed according to the type of operating system. There will be.

In addition, the messenger of the user terminal 1 extracts the address information of the user terminal 1 (step 504). The address information may also be extracted by communicating with the operating system or entering a command. As described above, the address information may include the IP address and the MAC address of the user terminal 1.

After extracting the network name information and the address information, the messenger of the user terminal 1 generates a UDP broadcasting packet for the information that the program has been executed and is transmitted to the user terminals connected to the local network, and the generated UDP broadcasting packet is transmitted to the user. It is also sent to terminal 2.

6A is a diagram illustrating a field configuration of a UDP broadcasting packet informing program execution information according to an embodiment of the present invention.

Referring to FIG. 6A, a UDP broadcasting packet notifying program execution information includes an identifier field 600, a network name information field 602, an IP address field 604, a MAC address field 606, and a broadcasting address field 608. ) May be included.

In the identifier field 600, preset identification information for identifying that the packet is information for program execution information, that is, a packet type for identifying role information of the packet is recorded. The messenger of the user terminal receiving the program execution broadcasting packet performs a process of identifying the message using the information included in the identifier field 600 and transmitting a response message, which is a subsequent operation.

In the network name information field 602, name information in the network of the user terminal extracted in step 502 is recorded, and the IP address and MAC extracted in step 504 are stored in the IP address field 604 and the MAC address field 606. Each address is recorded.

In the broadcasting address field 608, address information for broadcasting transmission of a packet is recorded. As described above, when limited broadcasting is used, an address of 255.255.255.255 may be recorded in this field.

When the UDP broadcasting packet having the above-described fields is transmitted to the user terminal 2, the messenger of the user terminal 2 registers the user terminal 1 as a contact using the address information included in the UDP broadcasting packet and the name information on the network ( Step 510).

In addition, the user terminal 2 transmits a response message to the user terminal 1 in response to the program execution UDP broadcasting packet (step 512).

6B is a diagram illustrating a field configuration of a UDP broadcasting response message according to an embodiment of the present invention.

Referring to FIG. 6B, a UDP broadcasting response message according to an embodiment of the present invention may include an identifier field 650, a network name information field 652, an IP address field 654, a MAC address field 656, and a destination address. May include field 658.

In FIG. 6B, the identifier field 650 records preset identification information for identifying the response message for UDP broadcasting, and the address information and the network name information of the corresponding user terminal are also included in the response message as in the broadcasting message. Is recorded. In the destination address field 658, address information of the user terminal that transmitted the UDP broadcasting packet is recorded. In the case of FIG. 5, address information of the user terminal 1 is recorded in the destination address field 658.

6A and 6B show that a UDP broadcasting packet and a response packet thereof include a broadcasting address field and a destination address field, but the broadcasting address and the destination address may be designated in the UDP layer that processes the UDP packet. Alternatively, the destination address or broadcasting address information may be specified in the IP layer that proceeds after the UDP packet processing is completed. Therefore, in the UDP layer, a destination and a broadcasting address field may not be specified among the fields of the packets of FIGS. 6A and 6B.

The messenger of the user terminal 1 that receives the UDP broadcasting response message having the above-described field configuration registers the user terminal 2 as a contact person in an offline state by using the network name information and the address information of the received response information (step 514).

4 is a diagram illustrating an example of a messenger screen capable of transmitting and receiving messages in a local network in an offline state according to an exemplary embodiment of the present invention.

As shown in FIG. 4, when messenger users of the local network are registered by the procedure of FIG. 5, user information connected to the local network is displayed in the messenger window as a friend list of a general messenger, and the user is registered users. Instant message communication with In addition, as shown in FIG. 4, it is preferable to classify and display conversation counterparts for each work group using work group information on the local network included in the network name information.

7 is a flowchart illustrating a process of delivering state change information to user terminals of a state local network in an offline state according to an exemplary embodiment of the present invention.

Referring to FIG. 7, when a messenger uses a messenger in an offline state, the messenger monitors whether the state information of the user is changed (step 700). Like a normal messenger, the user can change his / her status directly through the menu (for example, during other work or eating), or the messenger can automatically change the status when there is no use of the terminal for a certain period of time (eg For example, away).

If a state change is detected, a process of extracting network name information and address information of the corresponding user terminal is performed (steps 702 and 704). Of course, since the information is extracted when the messenger program is executed, the extracted information may be used.

The messenger of user terminal 1 transmits a UDP broadcasting packet including the changed state information, and user terminal 2 receives the transmitted UDP broadcasting packet (step 706). Unlike FIG. 7, the messenger of user terminal 1 may transmit a status information change message to other user terminals registered as chat partners.

User terminal 2 changes the state information for user terminal 1 using the received state change information (step 708).

8 is a flowchart illustrating a process of transmitting a message in an offline messenger according to an exemplary embodiment of the present invention.

Referring to FIG. 8, first, a messenger receives conversation partner selection information to transmit a message from a user (step 800). The user selects the chat counterpart by clicking the chat counterpart icon displayed on the messenger window.

The user inputs a text message in the chat window to request a text message transmission or requests to transmit a specific file of the terminal, and the messenger determines the user's request information (step 802).

If the user requests to send a text message, the messenger sends a UDP packet including the message text to the address of the user terminal selected as the conversation partner (step 804). In the case of text, reliability is not very important, so it is preferable to transmit a message in a UDP packet.

If the user requests a file transfer, the messenger establishes a TCP connection with the selected chat counterpart client (step 806).

9 is a diagram illustrating a field configuration of a message packet according to an exemplary embodiment of the present invention. As shown in FIG. 9, a message packet according to an embodiment of the present invention includes an identifier field 900 and a source address. Field 902, destination address field 904, and message field 906.

9 may be a UDP packet for text transmission, a TCP packet for file transmission, and the header and trailer fields in the UDP and TCP packets are general and thus omitted.

In FIG. 9, address information of a user terminal transmitting a UDP or TCP message packet is recorded in a source address field. In this case, the source address may be composed of only an IP address, or may be a combination of an IP address and a MAC address since a specific network may not be identified by only an IP address.

Unlike the UDP or TCP message packet of a typical messenger, the message packet according to the present invention records address information of a user terminal to receive a message at a destination address. Typically, the message packet is delivered to the instant messaging server of the messenger system and relayed to the terminal of the conversation counterpart. In the present invention, the message packet is transmitted directly to the terminal of the conversation counterpart. As described above, the address information of the conversation counterpart terminal may include an IP address and a MAC address.

If a TCP connection with the user terminal to transmit the file is established, a TCP packet of the form shown in FIG. 9 including file information is transmitted to the corresponding user terminal (step 808).

As described above, according to the messenger communication method and a recording medium therefor according to the present invention, there is an advantage that the messenger communication with the user terminals connected to the local network can be performed even without the user login process.

Further, according to the present invention, even if members who share the local network is not registered as a chat partner, members who share the local network can be automatically registered as chat partners.

In addition, according to the present invention, even if it is not possible to access a messenger system connected to an external network such as the Internet due to a communication failure, there is an advantage that messenger communication is possible between users of the local network.

Although the above has been described with reference to a preferred embodiment of the present invention, those skilled in the art to which the present invention pertains without departing from the spirit and scope of the present invention as set forth in the claims below It will be appreciated that modifications and variations can be made.

Claims (15)

A method of delivering a message between local network user terminals in an offline messenger, Generating a broadcasting packet to be transmitted to nodes connected to the local network when the messenger is executed (a), wherein the broadcasting packet is a preset destination address for allowing broadcasting to be performed in the local network; At least one of address information and name information in the local network; Broadcasting the generated broadcasting packet to other user terminals in a local network, and receiving a response packet to the broadcasting packet from at least one other user terminal (b)-the response packet is at least the broadcasting Address information of the user terminal receiving the packet and name information in the local network; (C) registering another user terminal of the local network that has transmitted the received response packet as a conversation partner; And (d) performing instant message transmission and reception by using address information of other user terminals of the local network registered as the conversation partner. The method of claim 1, When receiving the broadcasting packet from another user terminal in a local network, further comprising generating and transmitting the response packet including address information and name information in a local network to the corresponding user terminal. A method of delivering a message between local network user terminals in a messenger in a status. The method of claim 1, The broadcasting packet is a UDP broadcasting packet, characterized in that the message transfer method between the local network user terminals in the offline messenger. delete The method of claim 1, The name information in the local network is a workgroup and name information in the local network of the corresponding user terminal registered in the operating system message delivery method between the local network user terminals in the offline messenger The method of claim 1, The method of claim 1, wherein the address information includes at least one of an IP address and a MAC address of the corresponding user terminal. The method of claim 1, And the response packet is a UDP packet having an address of a user terminal transmitting the broadcasting packet as a destination address. The method of claim 1, Monitoring whether the status of the messenger user is changed due to a user request or occurrence of a preset event; And If the status is changed, generating a broadcasting packet informing of the status change and transmitting to the user terminals of the local network further comprising a method for delivering messages between local network user terminals in the offline messenger. The method of claim 1, Step (d) is, Determining whether the type of message to be transmitted is a text transmission file or a file transmission message; When the message to be transmitted is a text transmission message, generating a UDP message packet having the terminal address of the conversation partner as a destination address and transmitting the UDP message packet to the terminal of the conversation partner; And If the message to be transmitted is a file transfer message, generating a TCP message packet having the terminal address of the conversation partner as a destination address and transmitting the message to a terminal of the conversation partner; How messages are delivered. A recording medium in which a combination of instructions for instant message communication between user terminals connected to a local network in a messenger offline state is tangibly implemented and which can be read by an electronic information processing apparatus. A user information extraction module for extracting address information of the user terminal and name information from the local network when the messenger program is executed; A broadcasting message generating module for generating a broadcasting packet message including address information extracted from the user information extracting module and name information on a local network, and transmitting the generated packet message to nodes of a local network in a broadcasting manner. The broadcasting packet includes a preset destination address to enable broadcasting within the local network; Registering network user information for receiving a response packet from other user terminals of the local network receiving the broadcasting packet message, and registering at least one other user terminal connected to the local network as a contact using information included in the response packet. A module, wherein the response packet includes at least address information of a user terminal receiving the broadcasting message and name information in a network; And And a message transmission / reception module for controlling message transmission and reception between user terminals of a local network registered by said network user information registration module. The method of claim 10, When receiving the broadcasting packet message from the other user terminal of the local network, further comprising a broadcasting message response module for generating the response packet including the address information and the name information on the network to transmit to the corresponding user terminal A recording medium on which a program is recorded. The method of claim 10, The broadcasting packet generated by the broadcasting message generating module is a UDP broadcasting packet. The method of claim 10, And the address information includes at least one of an IP address and a MAC address. The method of claim 10, When the user's status information is changed due to a user's request or a preset event occurrence, a broadcasting packet is generated and transmitted to the nodes of the local network informing the change of the status information, and the status information is transmitted from other user terminals in the local network. And a status information management module for registering status change information when receiving a broadcasting packet informing of a change. The method of claim 10, The message transmission and reception module, If the message to be transmitted is a text transmission message, a UDP message packet is generated and transmitted directly to the terminal of the conversation counterpart. If the message to be transmitted is a file transfer message, a recording medium having a program recorded thereon, wherein the TCP message packet is generated and transmitted directly to a terminal of a conversation counterpart.

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