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Message server, message system, and method of management of presence information as well as program for implementing presence information management

  • US 20030225843A1
  • Filed: 03/18/2003
  • Published: 12/04/2003
  • Est. Priority Date: 03/18/2002
  • Status: Abandoned Application
First Claim
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1. A message server including:

  • a message delivery unit for delivering a message between terminals of users;

    a user-related information storage unit for storing each presence information of each terminal of each user and each communication group member list belonging to said each user;

    a user-related information management unit for notifying a presence information of at least one member, who is listed on said each communication group member list, to said each terminal of said each user; and

    a presence information renewal unit for renewing a presence information, which belongs to a terminal of a user as sender who sends a message to said message server, and which is stored in said user-related information storage unit, wherein said presence information renewal unit renews said presence information automatically in response to at least one of a first type event that said message server has received at least one of said message and any other communication from said user as sender, and a second type event that an effective time period for said presence information has expired.

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