Construction method for hybrid switching optical network based on loop circuit

Abstract

The invention provides a mixed ASTN construction method, which effectively combines OCS and OBS two exchange modesby constructing network to form a ring topological structure OBS network and OCS network combination, making majority service to reach target node via one hop. The method satisfies communication need of network of most conditions. When network service changes in a small range, service Optical path can not bear will continue to transmit along ring topology in OBS exchange style. The inventive networking technology is more simple and effective, network performance worsening degree is small arising from network dynamic change, network operation is more stable and possesses relatively high communications capability; furthermore, network algorithm realization is less difficult and practical.

Description

technical field [0001] The invention belongs to the technical field of optical communication, and in particular relates to the switching structure design technology of an optical hybrid switching system. Background technique [0002] The emergence of Wavelength Division Multiplexing has created a precedent for terabit transmission bandwidth. At this point, the required bandwidth is no longer the primary factor in determining network spending. The original optical network is the interconnection of optical fiber links between points. Optical signals must be converted into electrical signals for electrical processing at each node in the network, so it has a high bandwidth resource sharing rate. However, due to the low connectivity of the physical topology of the backbone network, about 70% of all services handled by the network's electrical routers are forwarding services—the services that still need to be transmitted for one or more hops to reach their destination nodes. The...

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Problems solved by technology

The two methods use different modulation techniques to put optical labels on the data packets, and detect hop-by-hop at the middle node of the optical path, and also need to directly insert data on the optical path. These required technologies significantly increase the complexity of optical network implementation.

[0013] The above-mentioned hybrid switching method has problems such as virtual topology construction, difficulty in network implementation, and how to reasonably use resources for data transmission. How to solve these problems and make full use of the advantages of basic switching technology to improve network performance has become a unresolved issues

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