Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

OptoElectronics and Communications Conference and International Conference on Photonics in Switching and Computing (OECC/PSC)

Auxiliary Graph Based Routing, Wavelength and Time-slot Assignment in Metro Quantum Optical Networks

Kai Dong, Yongli Zhao, Xiaosong Yu, Jie Zhang, Hao Yu, Zhenwei Li

Published Jul 1, 2019• 6 citations
Publisher

Abstract

An auxiliary graph is constructed to describe the nodes adjacency in different levels influenced by distance, based on which a routing, wavelength and time-slot assignment algorithm is proposed and evaluated in metro quantum optical networks.
DOI
10.23919/ps.2019.8817743

Related papers

Auxiliary graph based routing, wavelength, and time-slot assignment in metro quantum optical networks with a novel node structure

Kai Dong, Yongli Zhao, Xiaosong Yu +2 more

Nowadays, critical sectors in government, finance, and military are facing increasingly high security challenges. However, traditional public-key crypto-systems based on computational complexity are likely to suffer from upgrade computational power. Quantum key distribution (QKD) is a promising technology to effectively address the challenge by providing secret keys due to the laws of quantum physics. Limited by the transmission distance of quantum communications, remote parties have to share secret keys by exchanging keys through the trusted relay nodes hop by hop. However, if relaying hop by hop is still used in metro quantum-optical networks (MQON), a large amount of key resources will be wasted since the distance between any two nodes is short. Therefore, the problem of how to distribute quantum keys with lower waste of key resources over MQON is urgent. In order to solve this problem, we design a novel quantum node structure that is able to bypass itself. Also, by extending the connectivity graph, auxiliary graphs are constructed to describe the adjacency of quantum nodes in different levels influenced by the physical distance. Based on the novel node, two routing, wavelength and time-slot assignment algorithms are proposed, in which some middle nodes can be bypassed to reduce the resource consumption as long as the distance between the two parties meets the requirement of quantum key distribution. Simulations have been conducted to verify the performance of the proposed algorithms in terms of blocking probability, resource utilization, number of bypassed nodes, and security rate per service. Numerical results illustrate that our algorithms perform better on resource utilization than a traditional scheme without bypass. Furthermore, a tradeoff between the keys saved and blocking probability is analyzed and discussed in our paper.

Optics Express•Feb 10, 2020•38 citations

Routing, Wavelength and Time-Slot Assignment Approaches with Security Level in QKD-Enabled Optical Networks

Weike Ma, Ling Liu, Bowen Chen +3 more

We develop two routing, wavelength, time-slot assignment (RWTA) approaches to improve overall network security performance and quantum key utilization by considering different security levels. Simulation results show the effectiveness of our proposed approaches.

Asia Communications and Photonics Conference•Jan 1, 2020•11 citations

Resource allocation in software-defined optical networks secured by quantum key distribution

Yuan Cao, Yongli Zhao, Xiaosong Yu +4 more

A resource allocation scheme consisting of joint assignment of routing, wavelength and time-slot is proposed to construct different channels in software-defined optical networks secured by quantum key distribution (QKD). Security level is considered by key-updating period.

Opto-Electronics and Communications Conference (OECC)•Jul 1, 2017•8 citations

Multidimensional Resource Allocation in Quantum Key Distribution-Integrated Optical Networks

Xu Zhang, Li Liu, Wentao Dong +2 more

With the rapid development of optical networks and the increasing amount of data transmission, information security has become a critical concern. Quantum key distribution can theoretically provide security for data encryption key distribution, and its integration into optical networks can enhance overall security. To reduce deployment costs, Wavelength Division Multiplexing is used to combine quantum and classical signals. However, limited wavelength resource necessitate the use of Time Division Multiplexing. How to efficiently allocate the multidimensional resources, such as wavelength, time slots, and encryption keys, has become a key issue in the design of secure optical networks. This paper proposes a Security-Level-based routing, wavelength, and time slot assignment strategy for optical networks. To evaluate the effectiveness of the proposed strategy, we introduce a new metric called Average Key Consumption. This metric allows us to assess key usage efficiency and network performance. We analyze the impact of different Average Key Consumption values on network resource allocation. Simulation results demonstrate that the Security-Level-based routing, wavelength, and time slot assignment strategy outperforms other strategies in handling high security demands.

International Conference on Intelligent Communications and Computing (ICICC)•Aug 15, 2025•0 citations

Multi-Hop-based Routing and Time-Slot Assignment in Centralized Quantum Entanglement Distribution Networks

Yazi Wang, Xiaosong Yu, Yongli Zhao +1 more

A multi-hop-based routing and time-slot assignment algorithm is proposed in centralized quantum entanglement distribution networks. Simulation results show that it can achieve good performance.

Asia Communications and Photonics Conference•Jan 1, 2021•0 citations

Soft-Reservation based Resource Allocation in Optical Networks Secured by Quantum Key Distribution (QKD)

Xian Ning, Yongli Zhao, Xiaosong Yu +5 more

A dynamic routing, wavelength and time-slot allocation algorithm based on soft-reservation is proposed to construct different channels in optical networks secured by QKD. Simulation shows the proposed algorithm can achieve high adaptability to security requirements.

Asia Communications and Photonics Conference•Jan 1, 2017•5 citations
Nowadays, critical sectors in government, finance, and military are facing increasingly high security challenges. However, traditional public-key crypto-systems based on computational complexity are likely to suffer from upgrade computational power. Quantum key distribution (QKD) is a promising technology to effectively address the challenge by providing secret keys due to the laws of quantum physics. Limited by the transmission distance of quantum communications, remote parties have to share secret keys by exchanging keys through the trusted relay nodes hop by hop. However, if relaying hop by hop is still used in metro quantum-optical networks (MQON), a large amount of key resources will be wasted since the distance between any two nodes is short. Therefore, the problem of how to distribute quantum keys with lower waste of key resources over MQON is urgent. In order to solve this problem, we design a novel quantum node structure that is able to bypass itself. Also, by extending the connectivity graph, auxiliary graphs are constructed to describe the adjacency of quantum nodes in different levels influenced by the physical distance. Based on the novel node, two routing, wavelength and time-slot assignment algorithms are proposed, in which some middle nodes can be bypassed to reduce the resource consumption as long as the distance between the two parties meets the requirement of quantum key distribution. Simulations have been conducted to verify the performance of the proposed algorithms in terms of blocking probability, resource utilization, number of bypassed nodes, and security rate per service. Numerical results illustrate that our algorithms perform better on resource utilization than a traditional scheme without bypass. Furthermore, a tradeoff between the keys saved and blocking probability is analyzed and discussed in our paper.
With the rapid development of optical networks and the increasing amount of data transmission, information security has become a critical concern. Quantum key distribution can theoretically provide security for data encryption key distribution, and its integration into optical networks can enhance overall security. To reduce deployment costs, Wavelength Division Multiplexing is used to combine quantum and classical signals. However, limited wavelength resource necessitate the use of Time Division Multiplexing. How to efficiently allocate the multidimensional resources, such as wavelength, time slots, and encryption keys, has become a key issue in the design of secure optical networks. This paper proposes a Security-Level-based routing, wavelength, and time slot assignment strategy for optical networks. To evaluate the effectiveness of the proposed strategy, we introduce a new metric called Average Key Consumption. This metric allows us to assess key usage efficiency and network performance. We analyze the impact of different Average Key Consumption values on network resource allocation. Simulation results demonstrate that the Security-Level-based routing, wavelength, and time slot assignment strategy outperforms other strategies in handling high security demands.