METHOD FOR REAL-TIME IDENTIFICATION OF CO-PRESENCE GROUPS USING GROUP VIEW SNAPSHOT ALGORITHM

摘要

PURPOSE: A real-time co-presence group discovery method using a group view snapshot algorithm is provided to reduce a calculation cost by determining a coexisting based on a group view snapshot which monitored a change of a view of a co-presence people. CONSTITUTION: An existing record per user is generated as a visit log based on a snapshot domain. A leave snapshot table is updated based on the visit log. Co-presence snapshot information between users is registered to a co-presence table(S250). A co-presence group is discovered by using the number of co-presence snapshot list of users of coexisting table(S260). The visit log includes a user ID, a join snapshot, and a leaving snapshot.