Orchestrating Inter-DC Quality-Enabled VNFFG Services in Packet / Flexi-Grid Optical Networks
| Main Authors: | Fichera, Silvia, Martínez, Ricardo, Casellas, Ramon, Martini, Barbara, Vilalta, Ricard, Muñoz, Raül, Castoldi, Piero |
|---|---|
| Format: | Proceeding |
| Bahasa: | eng |
| Terbitan: |
, 2018
|
| Online Access: |
https://zenodo.org/record/2525657 |
Daftar Isi:
- Network Services (NSs) to be supported over the upcoming 5G infrastructure are envisioned to be very heterogeneous demanding different network functions (NFs) such as Deep Packet Inspection, mobile Evolve Packet Core functions, etc. with various levels of QoS (in terms of bandwidth, latency, etc.). To this end, virtualization techniques as being defined by ETSI Network Function Virtualization (NFV) architecture provides an appealing framework and context where effectively deploying such NSs. Specifically, NFV virtualizes NFs over general-purpose servers hosted in datacenters (DCs). DCs may have different size (in terms of the equipped IT resources) which can be located at different geographical locations being inter-connected via a Wide Area Network (WAN) infrastructure. Those NFs to be deployed in DCs are commonly referred to as Virtual Network Functions (VNFs). In general, specific NSs may require that a number of VNFs deployed potentially in different DCs are sequenced to form the entire targeted service. The selection criteria to choose the DCs where the NS’VNFs are instantiated is diverse, mostly depending on the NS requirements and/or an adopted policy/strategy of the cloud/network operator. For the sake of completeness, such criteria may aim at selecting DCs which minimize the end-to-end latency of the demanded NSs, attain an efficient utilization of the cloud resources (e.g.,load balancing), etc. The ordered set of VNFs and their connectivity constituting NSs is commonly termed as VNF Forwarding Graphs (VNFFG) [1].
- Grant numbers : This work is funded Spanish Thematic Network ElasticNetworks (TEC2015-71932-REDT)