Method and system for non-disruptively assigning link bandwidth to a user in a high speed digital network
First Claim
1. A method for assigning link bandwidth to a requesting user in a high speed digital network which interconnects network users through paths including high speed links which interconnect network nodes, said method comprising:
- establishing pre-defined connection priorities among said users;
splitting predefined reservable link bandwidth into a nominal bandwidth portion and common bandwidth portion, both of which are assignable to the same connections on a priority basis;
each of common bandwidth priorities being individually related to a nominal bandwidth priority through a predefined relationship making said common bandwidth priorities lower than any nominal priority,whereby requested link connection bandwidth, whatever be its nominal priority, is preemptable primarily on said common bandwidth portion, thus avoiding the disruption of any already established network connection.
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Abstract
A method based on predefined connection priorities for assigning link bandwidth to a requesting user in a high speed digital network interconnecting network users through a path including network nodes connected through high speed links. According to this method, a predefined reservable link bandwidth is split into so-called nominal bandwidth portions and common bandwidth portions, both assignable to the same connections on a priority basis. Each of the common bandwidth priorities is individually related to a nominal bandwidth priority through a predefined relationship, making the common bandwidth priorities always lower than any nominal priority. In this way the requested link connection bandwidth, whatever be its nominal priority, is made preemptable primarily on all common bandwidth, thus avoiding the disruption of any network connection which is already established.
68 Citations
9 Claims
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1. A method for assigning link bandwidth to a requesting user in a high speed digital network which interconnects network users through paths including high speed links which interconnect network nodes, said method comprising:
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establishing pre-defined connection priorities among said users; splitting predefined reservable link bandwidth into a nominal bandwidth portion and common bandwidth portion, both of which are assignable to the same connections on a priority basis; each of common bandwidth priorities being individually related to a nominal bandwidth priority through a predefined relationship making said common bandwidth priorities lower than any nominal priority, whereby requested link connection bandwidth, whatever be its nominal priority, is preemptable primarily on said common bandwidth portion, thus avoiding the disruption of any already established network connection. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system for establishing a connection, on predefined priority basis, by defining a path for connecting a requesting end user to a destination end user, through a high speed network including network nodes interconnected by communication links,
said end users being attached to said network through network entry nodes providing ports, each node and port including means for storing a topology database for storing, in addition to the list of current network nodes and ports, a table storing properties of the links, including the bandwidth reserved on the link; -
the link bandwidth being split into nominal bandwidth portions and common bandwidth portions, both of which are assignable to the same connections on a priority basis, with each of said common bandwidth priorities being individually related to a nominal bandwidth priority through a predefined relationship making said common bandwidth priorities always lower than any nominal priority, said system including; means for scanning the links from the port attached to a requesting end user to said destination port, and for selecting as potential links for the path, only those scanned links for which the requested nominal bandwidth, C-- nom, added to the total link bandwidth reserved currently as provided by the corresponding link table is lower than a predefined reservable amount of the link bandwidth;
or for which C-- nom is preemptable on already assigned link bandwidth without disrupting any currently established connection; andmeans sensitive to said scanning means for defining the connection path between said requesting end user and the destination end user by selecting among said potential links. - View Dependent Claims (9)
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Specification