Patent ID: 11870746
Assignee: JEEN HY LEE
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC G  H

Claim 4:
5. The method of claim 2, wherein the second user corresponds to a plurality of users, a plurality of groups, or at least one user and group, and
the receiving of the message transmission request from the first user terminal corresponding to the first user to the second user terminal corresponding to the second user comprises:
receiving a transmission request of a message composed of a message header area and a message thread area, the message header area including a topic of a message to be transmitted by the first user terminal and at least one of subscription channels corresponding to the plurality of users that are the second user, subscription channels corresponding to the plurality of groups, and subscription channels respectively corresponding to the user and group, the message thread area including content of at least one message dependent on the message header area.