Bowen Chen

A novel recovery algorithm for multi-link failures in spectrum-elastic optical path networks

In this paper, a novel survivable algorithm with dynamic load balancing shared-path protection is proposed, named DLBSPP algorithm, in spectrum-elastic optical path networks (SLICE). To tolerate multi-link failures in SLICE, traffic self-adaptive restoration (TSAR) mechanism is adopted to restore the traffic affected by the failures. Simulation results show that, compared with the conventional SPP algorithm, DLBSPP algorithm has lower blocking probability (BP), better spectrum utilization ratio (SUR) and higher failure restoration ratio (FRR).

Multicast routing and spectrum assignment in Elastic Optical Networks

Modulation-Enabled node model is introduced in Elastic Optical Networks (EON), which describes the capability of changing Modulation Level (ML) dynamically. A novel multicast RSA algorithm is proposed and validated. Simulation results show its good performance.

Survivable virtual optical network embedding with probabilistic network-element failures in elastic optical networks

To measure the survivability of virtual optical network embedding, a novel metric named virtual optical network failure probability (VON-FP) is presented in elastic optical networks. We then develop a failure-probability-aware virtual optical network embedding (FPA-VONE) algorithm considering different line rates to decrease VON-FP of each VON. Simulation results show that FPA-VONE provides lower average VON-FP than the baseline algorithm, as well as frequency slots (FS) usage.

Differentiated quality-of-protection provisioning with probabilistic-shared risk link group in survivable flexi-grid optical networks

Abstract. A multilink failures model, i.e., probabilistic-shared risk link group (PSRLG), is adopted to investigate the problem of differentiated quality-of-protection (QoP) provisioning for flexi-grid optical networks. As a metric, service failure probability (SFP) is introduced to exactly examine the feasibility of differentiated QoP schemes, which denotes the failure probability of a connection during transmission. According to different reliability requirements, connection requests are divided into three classes, i.e., class high, class middle, and class low. Then two differentiated QoP provisioning schemes are proposed based on the class division, i.e., intraclass-shared resource scheme (ICSR scheme) and cross-class-shared resource scheme (CCSR scheme). The former allows a connection to share backup resources only with those connections in the same class, whereas the latter enables the connections in different classes to share backup resources. Simulation results show that our proposed schemes could well provide differentiated reliability with PSRLG constraint and achieve a good balance between reliability and resource efficiency. Moreover, the CCSR scheme achieves lower blocking probability, lower resource redundancy, and higher spectrum utilization without sacrificing reliability compared to the ICSR scheme.

p-Cycle Protection Approach with Maximum Spectrum Sharing in Elastic Optical Networks

In this paper, a p-Cycle protection approach with maximum spectrum sharing is proposed to reduce spectrum consumption. Simulation results show the proposed approach achieves lower blocking probability and resource redundancy than that without spectrum sharing.