Prof. Yang Qiu Profile

Prof. Yang Qiu

at Southwest Minzu Univ

SPIE Involvement:

Author

Proceedings Article | 18 March 2021 Paper

Fiber Bragg grating-based shape sensing: a review and perspective

Jingying Wu, Baixin Li, Chenxi Li, Yang Qiu, Zejun Zhang, Weichao Lyu, Amjad Ali, Syed Agha Hassnain Mohsan, Wenmin Ge, Zhijian Tong, Xintian Shen, Li Huang, Yezhou Wu, Bing Sun, Jing Xu

Proceedings Volume 11780, 117801F (2021) https://doi.org/10.1117/12.2590684

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Proceedings Article | 12 March 2020 Paper

Spectrum defragmentation in flexible grid optical networks

Yang Qiu

Proceedings Volume 11435, 1143505 (2020) https://doi.org/10.1117/12.2543170

KEYWORDS: Optical networks, Wavelength division multiplexing, Computer simulations

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Proceedings Article | 12 March 2020 Paper

Leaf-looping based multicast protection algorithm for elastic optical network

Meiling Pan, Yang Qiu

Proceedings Volume 11435, 1143504 (2020) https://doi.org/10.1117/12.2541004

KEYWORDS: Optical networks, Computer simulations

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Nowadays, with the increasing complexity of network structure and the application of diverse kinds of services, some problems, such as multicast-enabled routing, spectrum allocation and traffic protection, have become complicated in elastic optical networks (EONs). Since the transmission failure in EONs may lead to traffic interruption and thus causes serious economic loss, their ability to provide different modes of transmission, including unicast and multicast transmissions, with survivability is highly desirable. In this paper, aiming at improving the service blocking performance in realizing efficient protection for multicast services in EONs, we propose a leaf-looping based multicast protection algorithm, namely Multicast Protection with Leaf Loops (MPLL), which divides the destination nodes of multicast services into several groups according to their distance and constructs one loop for each group to provide protection for each destination node in the group. In constructing each destination loop, the shortest path algorithm is employed to minimize the cost of each generated loop. Besides, distance-adaptive spectrum allocation strategy is adopted for resource assignment to reduce the spectrum consumption in the proposed algorithm. In the research of protection technology, traditional P-cycle technology is an efficient optical network protection strategy, which has the characteristics of fast loop recovery speed and effective network recovery capacity. However, the P-cycle protection technology is pre-computed, which cannot meet the requirements of dynamic recovery. The leaf loops proposed in this paper are generated dynamically according to the destination nodes generated by each service, and can meet the dynamic business requirements. In addition, under the same blocking conditions, MPLL saves more path resources than P-cycle based algorithms in the protection path. Simulation results show that the proposed MPLL algorithm can realize multicast protection for EONs with low service blocking probability and high flexibility.

Proceedings Article | 12 March 2020 Paper

Spectrum defragmentation based on path-switching mechanism for 1+1 protection in elastic optical networks

Ke Hua, Yang Qiu

Proceedings Volume 11435, 1143503 (2020) https://doi.org/10.1117/12.2540954

KEYWORDS: Optical networks, Internet, Optical communications, Wavelength division multiplexing, Switching, Computer simulations

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With the increased quantity of Internet traffic, improving spectrum utilization has become a hot topic in the field of optical communication. However, the traditional wavelength-division-multiplexing (WDM) optical networks assign a constant spectral bandwidth (e.g. 50-GHz) to heterogeneous services and thus have limited flexibility and efficiency in spectrum utilization during service accommodation. In order to improve the efficiency in accommodating diverse services with heterogeneous bandwidth requirements, elastic optical networks (EONs) have been proposed. In these networks, spectrum resources can be allocated to different services flexibly according to their respective bandwidth requirements, so that the flexibility and efficiency of spectrum utilization can be remarkably improved. But the spectrum continuity and contiguity constraints in spectrum allocation may induce some isolated, non-aligned and small-sized spectrum segments, which are known as spectrum fragments. With the accumulation of spectrum fragments, the available spectral resources can be exhausted and the networking performance can be affected. Thus, spectrum fragmentation has become an important issue in EONs, and many algorithms have been proposed to reduce the number of spectrum fragments. Among these proposed algorithms, most of them were focus on the defragmentation along normal working paths for services, which might induce traffic disruption for existing service connections and had limited survivability for transmission failure. In order to alleviate the traffic interruption in spectrum defragmentation and improve the survivability for any link failure in transmission, we propose a spectrum defragmentation algorithm based on path-switching mechanism for 1+1 protection in EONs in this paper. Different from previous protection-path-based defragmentation algorithms, the proposed algorithm employs path-switching mechanism to realize active switching between the working path and the protection path according to the usage of the spectrum in the network, so that the two paths can be regarded as their mutual backup paths in the spectrum defragmentation along each of them. In this way, the protection path cannot only provide the survivability for the working path, but also alleviate the traffic disruption during the defragmentation along the working path, while the working path can alleviate the traffic disruption during the defragmentation along the protection path. Simulation results show that the proposed algorithm can realize low blocking probability with reduced traffic disruption for 1+1 protection in EONs.

Proceedings Article | 12 March 2020 Paper

Invalid spectrum rate based scheduling for advance reservation services in elastic optical networks

Shufang He, Yang Qiu

Proceedings Volume 11435, 1143502 (2020) https://doi.org/10.1117/12.2540148

KEYWORDS: Optical networks, Intelligence systems, Video, Wavelength division multiplexing, Numerical simulations, Computer simulations

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Conference Committee Involvement (1)

2021 International Conference on Optical Instruments and Technology: Optical Communication and Optical Signal Processing

12 November 2021 | Online Only, China

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