Fully SDN-Enabled All-Optical Architecture for Data Center Virtualization with Time and Space Multiplexing

Abstract

Virtual Data Centre (VDC) solutions provide an environment that is able to quickly scale-up and where virtual machines and network resources can be quickly added ondemand through self-service procedures. VDC providers must support multiple simultaneous tenants with isolated networks on the same physical substrate. The provider must make efficient use of their available physical resources whilst providing high bandwidth and low-latency connections to tenants with a variety of VDC configurations. This paper utilises state of the art optical network elements to provide high bandwidth optical interconnections and develop an VDC architecture to slice the network and the compute resources dynamically, to efficiently divide the physical network between tenants. We present a Data Centre Virtualisation architecture with an SDN-controlled all-optical data plane combining Optical Circuit Switching (OCS) and Time Shared Optical Network (TSON). Developed network orchestration dynamically translates and provisions VDCs requests onto the optical physical layer. The experimental results show the provisioned bandwidth can be varied by adjusting the number of time slots allocated in the TDM network. These results lead to recommendations for provisioning TDM connections with different performance characteristics. Moreover, application level optical switch reconfiguration time is also evaluated to fully understand the impact on application performance in VDC provision. The experimental demonstration confirmed the developed VDC approach introduces negligible delay and complexity on the network side.

An Overview on SDN and NFV Security Orchestration in Cloud Network Environment

“…These interactions between various components will ensure that the security of the overall network is maintained at all times. [16] Cryptography and Encryption…”

A Survey on Data Plane Flexibility and Programmability in Software-Defined Networking

“…All-optical DCN architecture is presented in [168]. The data plane of the proposed architecture consists of OCSs based on large-port-count fiber switches, above which the MCF switch is settled.…”

Enabling Heterogenous Low Latency and High-bandwidth Virtual Network Services for 5G Utilizing a Flexible Optical Transport Network

“…Since the TSON latency depends on the size of packets (64 bytes or 1500 bytes), the number of the time slices (TS), the data throughput (relative to the size of the TSON frame) and of the interleaved distribution of the TS [7,8], an empirical model to evaluate the latency has been built ( Fig. 3) to provide the weight of the TSON edge nodes used to perform the shortest path algorithm.…”

“…3) to provide the weight of the TSON edge nodes used to perform the shortest path algorithm. For a given data rate, to minimize the latency, a continuous distribution with 62 time slices has been considered [7,8]. Furthermore, to estimate the latency in real transmission, the size of the generated packets to build this empirical model is randomly selected between 64 bytes and 1500 bytes.…”