Abstract

Elastic optical networks (EONs) are a promising technology for the next-generation optical network, and advanced reservation (AR) applications have been growing expeditiously over the past few years. Thus, the routing and spectrum allocation problem for AR requests has become a significant concern. This paper proposes an approach named outright fit advanced resource reservation to improve the spectral resource allocation efficiency for AR connection requests. Our proposed approach works in two stages: The proposed resource reservation strategy first uses an outright fit resource allocation strategy to reserve the spectral resource for a connection request within the absolute best service window and leaves adequate spectral resources for subsequent requests. If a connection request cannot get resources in the first stage, the proposed optimal rescheduling technique then is applied to serve the request. Our proposed optimal rescheduling technique uses spectrum shifting and reallocation without altering the routing paths, and its optimal characteristic decreases the number of rescheduling operations, thereby decreasing the rescheduling computational complexity and cost, which improves the network’s quality of service. Moreover, this rescheduling approach increases the opportunities for successful rescheduling of the requests without inducing many spectrum fragments, significantly reducing the blocking probability. The simulation results illustrate that the proposed approach can considerably enhance the blocking performance and obtains high spectrum utilization.

© 2022 Optica Publishing Group

Dynamic Resource Allocation for Immediate and Advance Reservation in Space-Division-Multiplexing-Based Elastic Optical Networks

Seitaro Sugihara, Yusuke Hirota, Shohei Fujii, Hideki Tode, and Takashi Watanabe
J. Opt. Commun. Netw. 9(3) 183-197 (2017)

Static resource allocation of advanced reservation requests in elastic optical networks

Yi Zhao, Qi Zhang, Xiangjun Xin, Yiqiang Li, Ran Gao, Ying Tao, Qinghua Tian, Feng Tian, Dong Chen, and Guixing Cao
Appl. Opt. 59(5) 1420-1429 (2020)

Crosstalk-aware spectrum defragmentation by re-provisioning advance reservation requests in space division multiplexing enabled elastic optical networks with multi-core fiber

Yongli Zhao, Liyazhou Hu, Ruijie Zhu, Xiaosong Yu, Yajie Li, Wei Wang, and Jie Zhang
Opt. Express 27(4) 5014-5032 (2019)

Routing and Spectrum Assignment With Delayed Allocation in Elastic Optical Networks

Pegah Afsharlar, Arash Deylamsalehi, Jeremy M. Plante, Juzi Zhao, and Vinod M. Vokkarane
J. Opt. Commun. Netw. 9(3) B101-B111 (2017)

Using Spectrum Fragmentation to Better Allocate Time-Varying Connections in Elastic Optical Networks

Pouria Sayyad Khodashenas, Jaume Comellas, Salvatore Spadaro, Jordi Perelló, and Gabriel Junyent
J. Opt. Commun. Netw. 6(5) 433-440 (2014)