Subtree-based multicasting traffic grooming method in WDM (Wavelength Division Multiplex) optical network

Abstract

The invention provides a subtree-based multicasting traffic grooming method in a WDM (Wavelength Division Multiplex) optical network, belonging to the technical field of network communication. The method comprises the steps of: initializing, searching an optimal subtree, grooming by using the optimal subtree, adding a subtree, newly building a subtree, allocating resources, and releasing corresponding resources. Under the condition of multiple restrains, the method is used for carrying out service grooming by using the existing optical tree and the optical path in the network, has wider applicable range, low requirement on functions of network nodes in the WDM optical network, and has strong dynamic configuration traffic grooming capability due to no need of the network nodes compared with the virtual topology based traffic grooming method, and a relatively simple structure of the needed node.

Description

technical field [0001] The invention belongs to the field of network technology, and in particular relates to a subtree-based multicast service volume grooming method in a WDM optical network. Background technique [0002] With the rapid development of the Internet, people put forward new requirements for the capacity and performance of the communication system. A wavelength division multiplexing (Wavelength Division Multiplexing, WDM) technology can provide a huge transmission capacity to meet the bandwidth requirements of Internet services. However, once a network failure occurs, it will cause a large number of business interruptions. At the same time, in order to reduce network operating costs and improve bandwidth resource utilization, the transmission network is gradually developing from the traditional IP over ATM over SDH / SONET over WDM multi-layer structure to the IP over WDM two-layer structure, and IP services are directly carried on the on WDM optical network. ...

AI Technical Summary

Problems solved by technology

These two grooming strategies do not consider the constraints of optical transceivers, sparse partial wavelength conversion constraints, and sparse partial optical splitting constraints, and cannot be well adapted to the actual application scenarios of WDM optical networks.

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