Latency-aware resource orchestration in SDN-based packet over optical flexi-grid transport networks
In the upcoming 5G networks and following the emerging software-defined networking/network function virtualization (SDN/NFV) paradigm, demanded services will be composed of a number of virtual network functions that may be spread across the whole transport infrastructure and allocated in distributed...
| Authors: | , , , , , , , |
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| Format: | article |
| Status: | Published version |
| Publication Date: | 2019 |
| Country: | España |
| Institution: | Centre Tecnològic de Telecomunicacions de Catalunya (CTTC) |
| Repository: | r-CTTC. Repositorio Institucional Producción Científica del Centre Tecnològic de Telecomunicacions de Catalunya (CTTC) |
| OAI Identifier: | oai:cttc.fundanetsuite.com:p3205 |
| Online Access: | https://cttc.fundanetsuite.com/Publicaciones/ProdCientif/PublicacionFrw.aspx?id=3205 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85065098156&doi=10.1364%2fJOCN.11.000B83&partnerID=40&md5=3e7f4179cb3603269c383583695af34e |
| Access Level: | Open access |
| Keyword: | 5G mobile communication systems Bandwidth Packet networks Transfer functions End to end latencies Orchestration Propagation delays Stringent requirement Transport infrastructure Transport networks Virtual networks VNF forwarding graph Network function virtualization |
| Summary: | In the upcoming 5G networks and following the emerging software-defined networking/network function virtualization (SDN/NFV) paradigm, demanded services will be composed of a number of virtual network functions that may be spread across the whole transport infrastructure and allocated in distributed data centers (DCs). These services will impose stringent requirements such as bandwidth and end-to-end latency that the transport network will need to fulfill. In this paper, we present an orchestration system devised to select and allocate virtual resources in distributed DCs connected through a multi-layer (packet over flexi-grid optical) network. Three different on-line orchestration algorithms are conceived to accommodate the incoming requests by satisfying computing, bandwidth, and end-to-end latency constraints, setting up multi-layer connections. We addressed end-to-end latency requirements by considering both network (due to propagation delay) and processing delay components. The proposed algorithms have been extensively evaluated and assessed (via a number of figures of merit) through experimental tests carried out in a packet over optical flexi-grid network available in the ADRENALINE testbed with emulated DCs connected to it. © 2009-2012 OSA. |
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