Patent ID: 11929843
Assignee: SAMSUNG SDS CO., LTD.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 6:
7. A method for retrieving a chat history of a chat room, the method comprising:
generating a chat history retrieval request, the chat history retrieval request including an ID of a second user to whom an invitation message from a first user participating in the chat room is directed, and an ID of the chat room;
transmitting the chat history retrieval request to a server, and receiving, from the server, the chat history, the chat history including chats selected from among a history of chats of the chat room based on having a respective historical chat transmission time within a chat history retrieval start point, wherein each of the chats includes a respective user ID, chat content, and historical chat transmission time, wherein the chat history retrieval start point is a time within which the second user is able to retrieve chats from the history of chats of the chat room; and
enabling a device operated by the second user to display the previous chat history in a chat window;
wherein the invitation message includes an ID of the first user, an ID of the second user, an ID of the chat room, a transmission time of the invitation message, and a previous-message time-amount, and wherein the previous-message time-amount is a default basis for setting the retrieval start point; and
wherein the retrieval start point is a time point corresponding to a difference between the previous-message time-amount and the transmission time of the invitation message.