| 摘要 |
A system for maintaining presence information of public group members is provided, which includes a presence server and a group list management server, and further includes a presence group server, connected to the presence server and the group list management server and adapted to obtain information of the public group members from the group list management server according to a received subscription request for the presence information of the public group members, subscribe for the presence information of the public group members from the presence server, and save the presence information of the public group members. A presence group server and a method for maintaining presence information of public group members are also provided, which can reduce the stress on a resource list server and a presence server in terms of performance and resource occupation.
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