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Network resource reservation with admission and link control functions separated for expandability and high-speed operation

  • US 5,745,694 A
  • Filed: 08/30/1995
  • Issued: 04/28/1998
  • Est. Priority Date: 08/30/1994
  • Status: Expired due to Term
First Claim
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1. A network resource reservation system for a reconfigurable transmission network which comprises a plurality of parallel circuits each comprising a series of links interconnected by one or more interconnection switches, at least one of the links of one of said circuits being commonly assigned to multiple user networks, each of said user networks transmitting a reservation request indicating a circuit assigned to the user network, a network resource desired to be allocated from the resource of the assigned circuit, and start and end times of a reservation, comprising:

  • an interface connected to said user networks for receiving said request;

    a first database;

    a second database for storing resources respectively assigned to said user networks;

    an admission controller connected to the interface, the admission controller being responsive to a reservation request received by the interface for accessing said first and second databases, informing the requesting user network from which the request was transmitted that the request is denied if the network resource desired by the request is greater than an amount remaining in the resource assigned to the requesting user network and informing the requesting user network of grant of the request and storing the request into said first database if the desired network resource is equal to or smaller than said amount, said admission controller being responsive to the end time of the stored request for removing the stored request from said first database; and

    link control means connected to an associated one of said interconnection switches, the link control means being responsive to the start time of the stored request for operating the associated interconnection switch to establish the desired network resource, and responsive to the end time of the stored request for releasing the associated interconnection switch to clear the established network resource.

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