Resource allocation method for reliable transmission of requests based on shared backup path protection and fragmentation-aware in elastic optical networks

• Published in: Optical switching and networking Vol. 57; p. 100802
• Main Authors: Liu, Huanlin, Huo, Xingji, Chen, Yong, Liu, Bo, Ge, Runze, Deng, Di, Chen, Haonan
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.10.2025
• Subjects: Elastic optical network; Fragmentation; Reliable transmission; Shared backup path protection; Spectrum partitioning; Spectrum partitioning; Elastic optical network; Shared backup path protection; Reliable transmission; Fragmentation
• ISSN: 1573-4277
• DOI: 10.1016/j.osn.2025.100802

Elastic optical networks can effectively adapt to complex and dynamic network conditions, improving spectrum resource utilization. However, if the link fails, it will cause significant data loss or interruption to the network operator. Therefore, we propose a reliable routing, modulation, and spectrum allocation (SBPP-FA-RRMSA) algorithm based on shared backup path protection (SBPP) and fragmentation-aware to guarantee reliable transmission of requests and solve spectrum fragmentation problem. In order to save resources, we adopt the SBPP method, we design the reliability of requests based on path failure probability, and also design a path cost function combined with the path resources to select the transmission path. Then, we propose a dynamic spectrum partitioning method to guarantee non-interference of the working resources and the backup resources. Finally, in terms of resource allocation, we design a path fragmentation ratio to allocate working resources, and a spectrum fitness function to allocate backup resources. Simulation results show that under the premise of considering link failures, the proposed SBPP-FA-RRMSA has lower bandwidth blocking probability and fragmentation ratio compared with the algorithms that do not consider the probability of failures, fragmentation, and shared backup path protection, and it also makes full use of the sharing of backup resources. •Design a resource allocation method to guarantee reliable request transmission in EONs under the premise of link failure.•Design a path cost function based on path reliability and path resources.•Proposes a dynamic spectrum partitioning scheme by jointly considering path resources and link failure probability.•Design fragmentation-aware and sharing-aware measurement formulas for backup path resources.