December 2024
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20 Reads
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Publications (66)
July 2024
March 2024
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39 Reads
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1 Citation
October 2023
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24 Reads
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3 Citations
September 2023
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7 Reads
July 2023
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9 Reads
March 2023
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4 Reads
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2 Citations
January 2023
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4 Reads
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1 Citation
We demonstrate that joint orchestration of TSN and optical network domains in support of IIoT applications reduces the TSN blocking by four orders of magnitude and the usage of high priority queues by a 28-100%.
November 2022
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17 Reads
Due to the limitations of traditional data center (DC) architectures, the concept of infrastructure disaggregation has been proposed. DC resources are separated into multiple blades to be exploited independently. As a result, composable DC (CDC) infrastructures are achieved, enhancing the modularity of resource provisioning. However, disaggregation introduces additional challenges that need to be carefully analyzed. One relates to the potential complexity increase on the orchestration and infrastructure configuration that need to be performed when provisioning resources to support services. This aspect is highly influenced by the distribution of resources at the physical infrastructure. As such, when analyzing the performance of a CDC, it becomes essential to also study the related operational complexity of the resource orchestration and configuration phases. Furthermore, the requirements of several tenant services may impose heterogeneous deployments over the shared physical infrastructure in the form of either disaggregated single-server or multi-server distributions. The associated orchestration/configuration cost is again highly influenced by the data plane architecture of the CDC. With these aspects in mind, in this paper, we provide a methodology for analysis of the complexity of resource orchestration for a service deployment and the associated configuration cost in optical CDCs, considering various service deployment setups. A selected set of CDC architectures found in the literature is employed to quantitatively illustrate how the data plane design and service deployment strategies affect the complexity of infrastructure configuration and resource orchestration.
November 2022
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23 Reads
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7 Citations
Optical Switching and Networking
The rise of traffic intensive services and applications is pushing the limits of conventional single band Wavelength Division Multiplexing (WDM) optical networks. As an answer to this challenge, new data plane technologies are being investigated. Multi-band optical networks have raised as a very interesting candidate due to the potential increased capacity they offer thanks to the exploitation of multiple bands of the optical spectrum. Considering the whole telecom ecosystem, multi-band optical networks will coexist with other technological segments (e.g., Radio Access Network (RAN)) with the aim of provisioning services across the end-to-end infrastructure. With the advent of 5G and beyond 5G (B5G) architectures, novel provisioning paradigms are taking preponderance, such as the case of network slicing, which represents a radical paradigm change with respect to legacy business and provisioning models. As such, proper solutions for supporting network slice provisioning and runtime maintenance at the data plane are required. With this in mind, in this paper we present a control and orchestration architecture for the configuration and maintenance of network slices in multi-band optical networks, in support of B5G end-to-end services. Indeed, quality assurance and maintenance at all levels is seen as a cornerstone in B5G architectures. Thus, proper mechanisms adapted to the nature of the underlying sliceable multi-band data plane are required to ensure the quality of deployed slices. In this regard, we also present a novel band-adaptive protection scheme which takes advantage of the properties of the multi-band data plane so as to enhance the robustness of slices against quality degradations. We showcase the provisioning and maintenance of multi-band optical network slices by means of an experimental demonstration in a real testbed deployed at our premises. In addition, we evaluate the performance of the proposed band-adaptive protection scheme for slice quality assurance in front of other strategies by means of extensive simulation analysis in larger network scenarios.
Citations (48)
... On the other hand, DAEMON [20], ACROSS [21], and PREDICT6G [22] describe an AI-Native architecture, developing various solutions around scheduling, energy-aware orchestration and more. DAEMON and PREDICT6G focus on single-domain deployments, while REASON targets crossdomain functionality and enhanced E2E monitoring capabilities. ...
- Citing Conference Paper
October 2023
... A comparison between MBT and multiple optical fiber pairs has been explored in [5]. MBT offers several key advantages, including expanded bandwidth capacity, energy efficiency, and increased flexibility, and MBT can provide access to more wavelength resources and offers diverse optical paths for the network, simplifying the management of network slicing functions [6][7][8]. By leveraging multiple transmission bands, such as the O-, E-, S-, C-, and L-bands, multi-band networks significantly increase fiber capacity without the need for laying new fibers. ...
- Citing Article
November 2022
Optical Switching and Networking
... Furthermore, machine learning (ML) techniques are recently gaining popularity in optical networks with new traffic-driven traffic provisioning approaches [3]. Different methods are proposed to achieve zero-touch self-optimizing or intentbased architectures [4]. Finally, various literature studies have shown how short-and long-term traffic prediction can improve those next-generation algorithms (e.g., [5], [6], [7]). ...
- Citing Conference Paper
January 2022
... Tree-based multicast can be categorized into source-based tree, shared tree, dynamic source-based tree, and mesh-based tree. Examples include source tree multicast [10], core-based tree [11], and AMRIS (adaptive mesh-based multicast routing) [12]. Table 1 presents a comparative analysis of the characteristics of tree-based multicast techniques. ...
- Citing Article
- Full-text available
September 2021
Applied Sciences
... Regarding the QoS of mobile networks, several researchers have proposed various methodologies. First, a machine learning (ML) model is proposed that analyzes the vertical sector quality of service and predicts the degradation of the perceived quality (QoP) in the next 5 min [22]. Second, a cost-effective hybrid analytical model was proposed to obtain the user quality index (UQI) and know the quality perceived by the user of the eMBB scenario in the 5G SA network. ...
- Citing Article
October 2021
Computer Communications
... The longer this recovery process takes, the lower the network throughput will be, particularly for the intra data center scenarios where many applications produce short traffic packets. Four, the multi-tenant services and applications with various data flows impose their own set of heterogeneous traffic requirements to the DC infrastructure [10]. Thus, a reconfigurable and highly flexible connectivity for DCN is required to provide the customized network frameworks to the various applications. ...
- Citing Conference Paper
December 2020
... In ALLIANCE, a complete SDN/NFV-based control/management/orchestration architecture has been designed to deliver network slices customised to the requirements of the vertical services and applications [75][76][77]. The major challenge in this regard is that the provisioning of network slices may affect multiple SDN-controlled segments/technologies (optical access networks, metro, core and DCs). ...
- Citing Conference Paper
March 2021
... In ALLIANCE, a complete SDN/NFV-based control/management/orchestration architecture has been designed to deliver network slices customised to the requirements of the vertical services and applications [75][76][77]. The major challenge in this regard is that the provisioning of network slices may affect multiple SDN-controlled segments/technologies (optical access networks, metro, core and DCs). ...
- Citing Conference Paper
July 2020
... The work presented in (Bernini et al., 2020) proposes a 5G vertical service orchestration system centered on network slicing in an inter-domain scenario. This work provides some contextualization on inter-domain scenarios, introducing Verticals/Digital Service Consumers (DSCs) that leverage the services supplied by Digital Service Providers (DSPs). ...
- Citing Conference Paper
June 2020
... In 5G communication network manual maintenance [1], the operation and maintenance quality is often limited by the work experience of the maintenance engineers. And the maintenance knowledge will be lost with maintenance engineer changes. ...
- Citing Article
- Publisher preview available
December 2020
Photonic Network Communications