Virtual optical network mapping method for sensing fragments in space division multiplexing elastic optical network

Abstract

The invention relates to a virtual optical network mapping method for sensing fragments in a space division multiplexing elastic optical network, which belongs to the technical field of optical communication. According to the method, a node importance perception node sorting criterion is adopted in a node mapping stage; path selection is carried out according to spectrum resource differences of paths in a link mapping stage; and a fragment perception spectrum allocation method based on a fiber core classification strategy is adopted on the basis. The method provided by the invention comprisesthe steps of determining a virtual node mapping sequence by considering resource requirements of adjacent virtual links of a virtual node and the number of mapped virtual nodes around the node, and determining the importance of the physical node according to available computing resources of the physical node and bandwidth resources on the adjacent links; considering spectrum resources on a physical path; and designing a path average aggregation degree calculation formula. The invention provides a fragment-aware spectrum allocation method based on a fiber core classification strategy. Accordingto the method, the frequency spectrum fragments in the network can be reduced, and the balance of network resource use can be improved.

Description

Technical field [0001] The invention belongs to the field of optical communication technology, and relates to a virtual optical network mapping method for fragment sensing in a space division multiplexing elastic optical network. Background technique [0002] With the rapid development of the Internet and communication technologies, a large number of network-based business applications such as cloud computing, online games, and real-time video communications are constantly emerging, and network traffic has exploded, giving the backbone of the communication infrastructure the carrying capacity of the optical network Here comes a severe challenge. The wavelength division multiplexing WDM optical network fixed bandwidth wavelength allocation method cannot meet the increasingly diverse and flexible business bandwidth requirements, and the flexible optical network based on the optical orthogonal frequency division multiplexing technology due to its larger transmission capacity and fle...

AI Technical Summary

Problems solved by technology

However, when performing virtual network mapping in a space division multiplexing elastic optical network, strict spectrum constraints must be followed. At the same time, the dynamic arrival and departure of virtual optical network services results in many different sizes and misalignment on the optical path. Spectrum fragmentation greatly limits the further improvement of spectrum utilization in the network

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