Abstract: Provided is a method performed by a least one computing device for a message service. The method comprises receiving a transmission request for a compound message which is a bundled message comprising a parent message and a plurality of child messages, obtaining permission information for a sender of the compound message, determining whether to allow each of the child messages to be sent based on the permission information and controlling transmission of the compound message based on the determination result.

Abstract: Provided is a method performed in a terminal for processing an interest message. The method includes receiving a message from a message server after a login event for a user of the terminal occurs, wherein the login event is related to a message service provided by the message server; storing, in response to determining that the received message corresponds to an interest message of the user, the received message in a local storage of the terminal; receiving a search request for the interest message of the user; and searching and providing the interest message of the user through the local storage of the terminal in response to the search request.

Abstract: A message reception apparatus includes a reception module configured to receive a message transmitted from a message transmission apparatus, a determination module configured to compare a serial number of the received message with a serial number stored in a serial number management buffer, and to classify the received message as a normal message or an abnormal message based on a result of the comparison, and a processing module configured to process the normal message.

Abstract: Provided are a data transmission system and method of using a relay server. In the data transmission method using the relay server, the relay server transmits a registration result message to a client after registering the client through a registration packet when the client transmits the registration packet to the relay server. The relay server transmits registration information of the client to a location server. The location server stores client registration information according to each client.

Abstract: A message reception apparatus includes a reception module configured to receive a message transmitted from a message transmission apparatus, a determination module configured to compare a serial number of the received message with a serial number stored in a serial number management buffer, and to classify the received message as a normal message or an abnormal message based on a result of the comparison, and a processing module configured to process the normal message.

Abstract: Provided are a data transmission system and method of using a relay server. In the data transmission method using the relay server, the relay server transmits a registration result message to a client after registering the client through a registration packet when the client transmits the registration packet to the relay server. The relay server transmits registration information of the client to a location server. The location server stores client registration information according to each client.