More Like this

1. Investigation of Disaster-Resilient Network-Cloud Ecosystem with Open Disaggregation and Cooperation Technologies (Invited)

   Xu, S.; Ishii, K.; Yoshikane, N.; Sahoo, S.; Ferdousi, S.; Shiraiwa, M.; Hirota, Y.; Tsuritani, T.; Tornatore, M.; Awaji, Y.; et al (April 2023, Cyber Physical Systems enabled by Sensing/Network/AI and Photonics Conference (CPS-SNAP))

   We investigate the problem of future disaster-resilient optical network-cloud ecosystems. We introduce our solutions considering openness/disaggregation and cooperation for single- and multi-entity network-cloud ecosystems, respectively. 

   more » « less
2. Multi-entity cooperation platform facilitating network-cloud recovery

   https://doi.org/10.1364/JOCN.560240  

   Xu, Sugang; Sahoo, Subhadeep; Ferdousi, Sifat; Shiraiwa, Masaki; Hirota, Yusuke; Tornatore, Massimo; Awaji, Yoshinari; Mukherjee, Biswanath (July 2025, Journal of Optical Communications and Networking)

   Cooperation among telecom carriers and datacenter providers (DCPs) is essential to ensure the resiliency of network-cloud ecosystems. To enable efficient cooperative recovery in case of traffic congestion or network failures, we introduce a novel, to our knowledge, multi-entity cooperation platform (MCP) for implementing cooperative recovery planning. The MCP is built over distributed ledger technology (DLT), which ensures decentralized and tamper-proof information exchange among stakeholders to achieve open and fair cooperation. We experimentally demonstrate a proof-of-concept DLT-based MCP on a testbed. We showcase a DCP–carrier cooperative planning process and the corresponding recovery in the data-plane, showing the possibility of multi-entity cooperation for quick recovery of network-cloud ecosystems. 

   more » « less
3. Resilience enhancement in open network–cloud ecosystems through disaggregation and cooperation [Invited]

   https://doi.org/10.1364/JOCN.500488  

   Xu, Sugang; Ishii, Kiyo; Yoshikane, Noboru; Sahoo, Subhadeep; Ferdousi, Sifat; Shiraiwa, Masaki; Hirota, Yusuke; Tsuritani, Takehiro; Tornatore, Massimo; Awaji, Yoshinari; et al (January 2024, Journal of Optical Communications and Networking)

   To accommodate the growing demand for cloud services, telecom carriers’ networks and datacenter (DC) facilities form large network–cloud ecosystems (ecosystems for short) physically supporting these services. These large-scale ecosystems are continuously evolving and must be highly resilient to support critical services. Open and disaggregated optical-networking technologies promise to enhance the interoperability across telecom carriers and DC operators, thanks to their open interfaces in both the data plane and control/management plane. In the first part of this paper, we focus on a single entity (e.g., a telecom carrier or an emerging telecom/DC partnership company) that owns both the network and DC infrastructures in the ecosystem. We introduce a solution by leveraging open and disaggregated technologies to enhance the resilience of the optical networks within a multi-vendor and multi-domain ecosystem. In the second part of this paper, we consider the case when the networks and DCs are owned by different entities. Also, in this case, cooperation among datacenter providers (DCPs) and carriers is crucial to provide failure/disaster resilience to today’s cloud services. However, such cooperation is more challenging since DCPs and carriers, being different entities, may not disclose confidential information, e.g., detailed resource availability. Hence, we introduce a solution to enhance the resilience of such multi-entity ecosystems through cooperation between DCPs and carriers without violating confidentiality. 

   more » « less
4. Resilience Enhancement of Optical Network-Cloud Ecosystems with Dataspace Framework and Multi-entity Cooperation (Invited)

   https://doi.org/10.1109/SUM65312.2025.11121758  

   Xu, Sugang; Mitrovska, Angela; Sahoo, Subhadeep; Hirota, Yusuke; Shariati, Behnam; Yoshida, Yuki; Safari, Pooyan; Fischer, Johannes K; Freund, Ronald; Furukawa, Hideaki; et al (July 2025, IEEE)

   To enhance the resilience of network-cloud ecosystems, we establish a data governance framework for sharing optical testbed data across organizations and fostering machine learning research of optical networks. We further introduce multientity cooperation for efficient network-cloud recovery with open and policy-based information sharing among entities. 

   more » « less
5. Post-disaster cloud-service restoration through datacenter-carrier cooperation

   https://doi.org/10.1364/JOCN.561579  

   Sahoo, Subhadeep; Xu, Sugang; Ferdousi, Sifat; Hirota, Yusuke; Tornatore, Massimo; Awaji, Yoshinari; Mukherjee, Biswanath (July 2025, Journal of Optical Communications and Networking)

   In network-cloud ecosystems, large-scale failures affecting network carrier and datacenter (DC) infrastructures can severely disrupt cloud services. Post-disaster cloud service restoration requires cooperation among carriers and DC providers (DCPs) to minimize downtime. Such cooperation is challenging due to proprietary and regulatory policies, which limit access to confidential information (detailed topology, resource availability, etc.). Accordingly, we introduce a third-party entity, a provider-neutral exchange, which enables cooperation by sharing abstracted information. We formulate an optimization problem for DCP–carrier cooperation to maximize service restoration while minimizing restoration time and cost. We propose a scalable heuristic, demonstrating significant improvement in restoration efficiency with different topologies and failure scenarios. 

   more » « less