Process for the establishment of virtual connections passing through switching matrices of a multi-stage switching system
AssigneeSiemens Aktiengesellschaft
InventorsPeter Rau, Andreas Foglar, Herbert Schneider
Life of this patent
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Abstract
For the establishment of vertual connections passing through switching matrices of a multi-stage switching system, it is provided that upon the arrival of a call packet requesting the establishment of a virtual connection, a central control device identifies all the switching matrices involved in the connection to be established and determines setup information that must be assigned to each of them in order to establish the connection. This setup information is fed to the individual switching matrices from the central control device in a setup packet along the path of the virtual connection to be established.
Claims5
Process for the establishment of virtual connections passing through switching matrices of a multi-stage switching system for the transmission of message packets fed to inputs of the switching system whereby each of the message packets contains in a packet header a virtual channel number designating the respective virtual connection, and wherein a memory device is assigned to each of the inputs of each of the switching matrices, in which individual information is stored for the virtual connections passing through the assigned input, said process comprising the steps of:
- inputting at one of the inputs of the switching system a call packet requesting the establishment of a virtual connection and containing, in addition to a virtual channel number designating the virtual connection, a destination address,
- determining by a central control device assigned to the switching system, the switching matrices to be used for the virtual connection in question,
- determining individual information for each of the switching matrices,
- emitting from the central control device to the switching system a specially indicated setup packet containing the individual information that has just been determined through the input at which the call packet in question had previously arrived,
- passing the setup packet through the switching matrices involved in the virtual connection that is to be established, pursuant to the individual information contained in the setup packet,
- taking off by each of the switching matrices the individual information intended for it, and
- storing the individual information in the respective memory device which individual information gives on the one hand, the output of the respective switching matrix through which the message packets belonging to the respective virtual connection are to be transmitted and, on the other hand contains a virtual channel number which is entered in the message packets belonging to the respective virtual connection for their transmission.
Dependencies are inferred from the claim text.