| 摘要 |
The invention relates to a method for a user to obtain services from an Instant Message and Presence Service (IMPS) server. The user is identified by a user identification (UserID). An application session is established, through an application client of the user, on the IMPS server. In order to establish the session, an identification code is established in order to be used for the session, and the session is established only if the identification code is not being used for an existing session established by the same user on the same server.
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