Research On Resource Allocation Technology Of Quantum Key Distribution Network Based On Multi-core Fiber

In recent years,quantum key distribution,as an important branch of quantum information science,has become one of the hot research topics at home and abroad due to its unconditional security characteristics based on the framework of quantum mechanics and information theory.With the development of quantum key distribution technology,the problem of channel capacity in single-core fiber carrying quantum key is becoming more and more prominent.The application of space division multiplexing technology provides a new idea for the development of optical network of quantum key distribution.Multicore fiber technology is one of the most widely used technologies in space division multiplexing because of its simple design principle and low cost.In the multi-core optical fiber network,the intercore crosstalk and other noises will bring a certain negative effect on the signal transmission,which makes the resource allocation problem in the multi-core optical fiber network have a certain obstacle.As a carrier technology for hybrid transmission of quantum and classical light,multicore fiber has once again attracted the attention of researchers.However,the quantum key distribution network based on multicore fiber lacks a resource allocation scheme for hybrid transmission of classical information and quantum key.This paper conducts an in-depth study on the above problems,evaluates physical factors such as inter-core crosstalk between quantum key information and classical optical information in multi-core optical network technology,establishes resource allocation model and optimization strategy,and finally verifies and draws corresponding conclusions through experimental simulation.The main work and research results of this paper are as follows:(1)A resource allocation strategy based on inter-core crosstalk and spectrum sensing in multi-core optical fiber networks is proposed,and a variety of schemes are proposed and compared from the perspectives of inter-core crosstalk constraint,resource utilization efficiency and core allocation,so as to solve the resource allocation problem of quantum and classical services based on inter-core crosstalk in multi-core optical fiber networks.(2)Multi-core optical fiber network in resource allocation scheme based on quantum key pool state awareness,through a combination of quantum key pool technology,comprehensive evaluate the crosstalk between the transmission distance and the core of business requests on the impact of quantum key distribution network and solve many core optical fiber long routing for quantum signal crosstalk between core of negative influence.(3)A resource allocation model based on non-cooperative game strategy is proposed to optimize the resource allocation process of hybrid services in multi-core optical fiber networks,so as to solve the balance between intercore crosstalk and network resource utilization efficiency in multi-core optical fiber quantum key distribution networks.