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GATEWAY APPARATUS

  • US 20090049180A1
  • Filed: 08/01/2008
  • Published: 02/19/2009
  • Est. Priority Date: 08/15/2007
  • Status: Abandoned Application
First Claim
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1. A gateway apparatus to be disposed between a plurality of terminals and a network in a system in which a session is established between the terminal and an apparatus at destination of communication through the network and, set the number of usable sessions in advance, the gateway apparatus comprising:

  • a session importance storage area in which degrees of importance of the sessions are stored in advance in association with a communication initiator identification information and a communication destination identification information of the sessions;

    a session status storage area in which the communication initiator identification information and the communication destination identification information are stored for one session or each of a plurality of sessions in progress;

    a session restoration storage area in which the communication initiator identification information and the communication destination identification information of a session which is interrupted are stored;

    a session restoration unit restoring the session between apparatuses indicated by the communication initiator identification information and the communication destination identification information stored in the session restoration storage area; and

    a session control unit controlling a establishment and an interruption of the session,wherein, the session control unit,when a connection request for a new session including the communication initiator identification information and the communication destination identification information indicating one of the terminals is received from the terminal in a state which the number of sessions in progress is equal to the number of usable sessions,refers to the session status storage area to identify the communication initiator identification information and the communication destination identification information for one or plurality of sessions which has already been established,refers to the session importance storage area based on identified communication initiator identification information and identified communication destination identification information to obtain the degree of importance for each of the sessions in progress,selects the session having the lowest degree of importance or one of sessions having degrees of importance lower than a predetermined reference,interrupts the selected session,stores the communication initiator identification information and the communication destination identification information of the selected session in the session restoration storage area, andestablishes a new session between the terminal of communication initiator and the apparatus at the communication destination according to the communication initiator identification information and the communication destination identification information included in the connection request for the new session,further wherein,the session restoration unit and/or the session control unit establishes the session between the terminals or apparatus indicated by the communication initiator identification information and the communication destination identification information which are stored in the session restoration storage area, when a session becomes usable as a result of a disconnection of the new session or another session, whereby restoring the interrupted session.

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