Brown-Field Migration Aware Routing and Spectrum Assignment in Backbone Optical Networks

Applied Sciences

Kaiqiang Gao¹  Jiye Wang¹  Xuerang Guo²  Xiaosong Yu³  Yongli Zhao³  Jie Zhang³  Kaixin Zhang³  Jiaqi Lv³ 

[1] China Electric Power Research Institute, Beijing 100192, China;Information and Communication Technology Center, State Grid Xinjiang Electric Power Research Institute, Urumqi 830011, China;School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China;

关键词: node upgrade;    probabilistic migration label;    traffic model;    migration aware service provisioning;   

DOI  :  10.3390/app12010438

来源: DOAJ

【 摘 要 】

With the development of optical networks technology, broad attention has been paid to flexible grid technology in optical networks due to its ability to carry large-capacity information as well as provide flexible and fine-grained services through on-demand spectrum resource allocation. However, a one-time green-field deployment of a flexible grid network may not be practical. The transition technology called the fixed/flex-grid optical networks is more applicable and highly pragmatic. In such network, many nodes would likely be upgraded from a fixed-grid to flex-grid. In fact, dynamic service provisioning during the process of a node upgrade in fixed/flex-grid optical networks have become a challenge because the service connection can be easily interrupted, which leads to considerable data loss because of node upgrade. To overcome this challenge, we propose a brown-field migration aware routing and spectrum assignment (BMA-RSA) algorithm in fixed/flex-grid optical networks. The aim is to construct a probabilistic migration label (PML) model. The well-designed label setting of PML can balance the relationship between distance and node-upgrade probability. Dynamic service provisioning operations are undertaken based on the PML model to achieve a migration-aware dynamic connection before network migration occurs. We also evaluate the performance of different service provisioning strategies under different traffic models. The simulation results show that the BMA-RSA algorithm can achieve: (1) the tradeoff between distance and node upgrade probability during the process of service provisioning; (2) lower service interruption compared with the traditional non-migration aware K-shortest-path routing and spectrum assignment algorithm.

【 授权许可】

Unknown