ATM exchange

• US 6,519,258 B1
• Filed: 11/24/1997
• Issued: 02/11/2003
• Est. Priority Date: 07/17/1995
• Status: Expired due to Fees

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Yamashita, Tomoko, Kato, Takashi, Tsukazoe, Atsushi, Yoshida, Koichi
• Primary Examiner(s): RAO, SEEMA SRINIVAS
• Application Number:
  US08/976,813
• Time in Patent Office: 1,905 Days
• Field of Search: 370/230, 370/235, 370/388, 370/389, 370/392, 370/398, 370/399, 370/412, 370/426, 370/430, 370/443, 370/450, 370/463, 370/395.21, 370/395.2, 379/201, 379/209.01, 379/269, 379/289, 340/825.51
• US Class Current: 370/395.21
• CPC Class Codes: H04L 2012/563 Signalling, e.g. protocols, reference model
• CPC Class Codes: H04L 2012/5632 Bandwidth allocation
• CPC Class Codes: H04L 2012/5651 Priority, marking, classes
• CPC Class Codes: H04L 49/3081 ATM peripheral units, e.g. policing, insertion or extraction
• CPC Class Codes: H04Q 11/0478 Provisions for broadband connections

Abstract

A temporarily saved band value management table for managing temporarily saved band value is provided, as is a band management table for managing empty band value in the storage device of an ATM exchange comprising a storage device, a control device, and the like. The control device selects a corresponding empty band value for a temporarily saved band value when a first camp-on request is received from a terminal, and sets the empty band value to “0.” In addition, the control device adds to the temporarily saved band value a band value released by a break in communication when a camp-on request is registered, and grants permission for communication to the terminal that has issued this camp-on request when the temporarily saved band value is higher than the band value required by a registered camp-on request. The control device determines whether or not a connection request can be accepted on the basis of the empty band value stored in the band management table.

Claims

1. A switching system for registering a camp-on when an empty band value corresponding to a band value requested from a transmitting terminal cannot be reserved, said switching system comprising:

storage means for storing a band value requested from a transmitting terminal for which a camp-on is registered;

temporarily saved band value management means for adding an empty band value released by a disconnected call to a temporarily saved band value which is reserved for the transmitting terminal; and

camp-on execution means for executing the camp-on when the temporarily saved band value satisfying the band value stored in said storage means is gotten for the transmitting terminal by said temporarily saved band value management means.

4. A switching system according to claim 1 or claim 2 or claim 3, further comprising:

notification means for notifying that the camp-on is executable to the transmitting terminal.

2. A switching system for registering a camp-on when an empty band value corresponding to a band value requested from a transmitting terminal cannot be reserved, said switching system comprising:

band management process means for managing an empty band value and a used band value on a transmission line;

camp-on registration process means for accepting a camp-on request from a transmitting terminal and for registering a camp-on for the transmitting terminal;

temporarily saved band value management means, when said band management process means detects an empty band value released by a disconnected call for adding the empty band to a temporarily saved band value which is reserved for the transmitting terminal for which the camp-on is registered as a part of the used band value, and

camp-on execution means for executing the camp-on when the temporarily saved band value satisfies the band value requested from the transmitting terminal.

3. A switching system for registering a camp-on when an empty band value corresponding to a band requested from a transmitting terminal cannot be reserved, said switching system comprising:

band management process means for managing an empty band value and a used band value on a transmission line;

camp-on registration process registration means for distinguishing a class allocated for a transmitting terminal for which a camp-on is registered and for registering the camp-on for the transmitting terminal associating with the class;

temporarily saved band value management means, when said band management process means detects an empty band value released by a disconnected call for adding the empty band to a temporarily saved band value which is reserved for the transmitting terminal associating with the class of a higher priority among the transmitting terminals for which the camp-ons are registered as a used band value, and

camp-on execution means for executing the camp-on when the temporarily saved band value satisfies the band value requested from the transmitting terminal.

5. A switching system comprising:

band management process means for managing an empty band value and a used band value on a transmission line;

camp-on registration process means, for registering a camp-on for the transmitting terminal when an empty band value corresponding to a band value requested from a transmitting terminal cannot be reserved; and

notification means for notifying the transmitting terminal of registration of the camp-on when said camp-on registration process means registers the camp-on;

wherein the switching system further comprises;

temporarily saved band value management means, when said band management process means detects an empty band value released by a disconnected call, for adding the empty band to a temporarily saved band value which is reserved form the transmitting terminal by which the camp-on is registered; and

second notification means for notifying the transmitting terminal that the camp-on is executable when the band value required from the transmitting terminal is gotten.