Nhn Corporation

Sung-Wone Choi

Hyoung-Jung Kim

The present disclosure is related to a P2P file transmission system and method, the system according to the present disclosure may include a P2P node managing system managing users connected to the system, and managing P2P file transmissions between the users; and a relay server relaying the file transmitted to the file receiver from the file sender when the P2P file transmission by the direct connection between the file sender and the file receiver fails. According to an embodiment of the present disclosure, the present disclosure provides more stable file transmissions under an unstable environment for the P2P file transmission such as NAT and the P2P file transmission system may be applied to various network places.

P2P file transmission system and method

Provided are messenger notification system and method using a synchronization server. The system includes a messenger service system controlling transmission of instant messages of messenger users and monitoring and transmitting messenger users' status change information; at least one external service system monitoring whether a predetermined event occurs and creating a notification message indicating the occurrence of the event when the event occurs; and a synchronization server receiving the messenger users' status change information from the messenger service system, storing the received status change information in an online user database, determining whether a user to receive the notification message is online when receiving the notification message from the at least one external service system, transmitting the notification message to the messenger service system to send the notification message to the online user when the user is online.

Messenger notification system and method using synchronization server

Disclosed is a notification system and method using messenger. The system includes a messenger system for controlling instant message transmission, monitoring messenger user state change, and transmitting user state change information; an external service system for monitoring occurrence of events and generating notification message indicating occurrence of the events; and a synchronization server for receiving the user state change information from the messenger system, providing the received user state change information to the at least one external service system, receiving the notification message from the at least one external service system, and transmitting the notification message to the messenger system. The external service system receives the user state change information from the synchronization server and manages messenger user online information, in case of the event occurrence.

Notification of internet service events using instant messaging service

Disclosed is an event alerting system and method using dynamic local grouping for 1:N event alerting. The event alerting method for an event alerting server to transmit an event message to clients connected on a network includes a) receiving an event alerting request from clients having generated events, or generating an event by the event alerting server, b) grouping the clients according to areas with reference to a transmission distance to the respective clients according to a client list by the event alerting server, c) transmitting a client list of the grouped areas and an alerting data packet to a plurality of master clients selected by the grouping process, and d) transmitting a client list and an alerting data packet to a master client from the master client of an upper group up to the last layer established by performing the grouping process again.

Event alerting system using a dynamic local grouping, and a method thereof

A system and method for message filtering are disclosed. A conversion target letter table is generated which stores information on letters that may be used to elude filtering, the table storing the hex code information of each letter that may be used for eluding filtering and the conversion letter information regarding the conversion letter to which each letter is to be converted. A hex code of a message text inputted by a user is compared with the hex codes of the table, and when a conversion target letter is included, it is converted to the conversion letter stored in the conversion target table associated with the letter. When the conversion is completed, it is determined whether or not pre-configured prohibited words are included in the converted message; and message filtering is performed.

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Seoul, South Korea

Sung-Wone Choi