Demonstration of low latency Intra/Inter Data-Centre heterogeneous optical Sub-wavelength network using extended GMPLS-PCE control-plane

Abstract

This paper reports on the first user/application-driven multi-technology optical sub-wavelength network for intra/inter Data-Centre (DC) communications. Two DCs each with distinct sub-wavelength switching technologies, frame based synchronous TSON and packet based asynchronous OPST are interconnected by a WSON inter-DC communication. The intra/inter DC testbed demonstrates ultra-low latency (packet-delay <270 µs and packet-delay-variation (PDV)<10 µs) flexible data-rate traffic transfer by point-to-point, point-to-multipoint, and multipoint-to-(multi)point connectivity, highly suitable for cloud based applications and high performance computing (HPC). The extended GMPLS-PCE-SLAE based control-plane enables innovative application-driven end-to-end sub-wavelength path setup and resource reservation across the multi technology data-plane, which has been assessed for as many as 25 concurrent requests.

Synchronization in a Random Length Ring Network for SDN-Controlled Optical TDM Switching

“…If the clock is distributed along the same fiber infrastructure used for data transmission, then the clock received at each node will be delayed exactly by the propagation delay between the node that distributes the clock and the receiving node. Another way is to distribute the same clock to all nodes by for example using local network for clock distribution [6] or the Global Positioning System (GPS) [7] allowing for the same time reference to exist in each node, however not accounting for the link propagation delay among nodes in the network.…”

“…Other examples exploit global synchronization with preengineered fiber link lengths and use either GPS [7] or a master clock reference [6,9] that is distributed in the network, without accounting for the propagation delay among nodes. Even though theoretically this enables accurate operation, in practice it introduces severe limitations on the network flexibility, planning and maintenance as fiber lengths must be accurately controlled.…”

All Programmable and Synthetic Optical Network: Architecture and Implementation

“…TSON was designed and implemented during the MAINS project [33] as a novel time multiplexing frame-based synchronous metro/datacenter subwavelength network solution [51] offering dynamic connectivity with fine bandwidth granularity (down to 100 Mb∕s). The data plane of this network accepts 10GE traffic flows, and after mapping them to TSON time-sliced data sets at edge nodes it transports them transparently through core nodes to the egress node.…”

“…9. TSON's control plane has been demonstrated by means of a PCE-GMPLS-SLAE (sublambda assignment engine) [51]; here, however, we developed a centrally controlled framework.…”

Hardware Virtualized Flexible Network for Wireless Data-Center Optical Interconnects [Invited]

“…In this framework a time shared optical network (TSON) is proposed and implemented as a novel time multiplexing metro network solution, offering dynamic connectivity with fine granularity of bandwidth in a contentionless manner. TSON deploys a control plane based on generalized multiprotocol label switching for dissemination and reservation of network resources for establishing connections [8]. In addition, TSON can efficiently interface with other technology domains such as wireless network (WN) and DC domains for setting up end-to-end paths.…”