Procedure for sorting flows in a transport network carrying circuit data flows

Abstract

A procedure for sorting a plurality of circuit data flows ( 7, 8 , . . . ) located, according to an initial configuration, in a plurality of sets of slots (space, time, frequency or wavelength) in a transport sub-network, comprising the following steps:-calculating a theoretical configuration in which flows are optimised in terms of occupied band by applying a theoretical flow routing algorithm; on the basis of the theoretical configuration defined above, exchanging the position of the flows in the sub-network slots to obtain an optimal arrangement which minimises the occupied slots; flows whose position corresponds to the position assumed by the flows in the initial position are identified to reduce the number of exchanges; defining and implementing a minimum shift sequence of single flows needed to shift each single flow from an initial position occupied in the initial flow configuration to a final position corresponding to the position assumed by the flow in the optimal slot set arrangement.

Description

technical field [0001] The present invention relates to transport networks using space, time, frequency or wavelength multiplexing to carry circuit data streams of synchronous and asynchronous types, and in particular to a method for classifying circuit data streams in subnetworks. Background technique [0002] As is known, data in a TDM (Time Division Multiplexing) transport network is transmitted in time windows or groups of fixed-length slots (called "slots"), each of which contains a time slot defined by the implemented protocol. or multiple circuit data streams. Such networks include, for example, SDH (Synchronous Digital Hierarchy) or SONET (Synchronous Optical Network) networks. The term "slot" thus means in this case a "time interval". [0003] In a WDM (Wavelength Division Multiplexing) network, data is transmitted at different wavelengths λ i on emission, different wavelengths λ i Instead of multiplexing slots and therefore may be referred to as "λ slots". Sim...

AI Technical Summary

Problems solved by technology

These spacings are often used for smaller data streams, and even smaller spacings will result that are even more difficult to use in the future

This effect in the intermediate period gradually deteriorates the ratio between the frequency band actually occupied by data in the subnet and the total available frequency band of the subnet, making the configuration of new data flows in the subnet virtually impossible

Images