Field-Trial Demonstration of Cost Efficient Sub-wavelength Service Through Integrated Packet/Circuit Hybrid Network [Invited]

Abstract

Carriers are under constant pressure to meet the ever-increasing bandwidth demand while reducing cost per bit, enhancing network throughput, and offering a large variety of services. Hybrid packet and circuit network technologies are being widely investigated and considered as a solution for offering both the high network throughput of the packet domain and wavelength services, i.e., a low fixed latency and zero packet loss. To enable carriers to serve a higher number of customers requiring wavelength services, optical transport network (OTN)based sub-wavelength switching is adopted to support finer granularity with similar performance to full wavelength services. However, OTN is not able to perform statistical multiplexing and achieve the throughput efficiency of packet networks. In this work an integrated hybrid optical network field-trial is described to demonstrate the ability to both aggregate and transport sub-wavelength circuits, and offer high throughput efficiency by statistically multiplexing traffic on transport wavelengths. Results show the transport of sub-wavelength services with packet-delay variation limited to only 15 ns and 82.4% wavelength utilization using statistical multiplexing.

A Converged Evolved Ethernet Fronthaul for the 5G Era

“…The TSN aggregation presented here employs gap-filling between HP frames [25]. The aggregator multiplexes HP traffic streams with LP streams by taking advantage of the interpacket gaps between HP frames and using them to transmit LP frames.…”

C-RAN Traffic Aggregation on Latency-Controlled Ethernet Links

“…Integrated Hybrid Optical Networks (IHONs) is a further evolution of the primary concept of hybrid node which was introduced in [18]. This new node architecture merges the circuit and packet network in the same wavelength to enable the circuit quality transport of demanding services with higher granularity than wavelengths and enabling statistical multiplexing for the throughput efficiency of packet networks.…”

“…The integrated hybrid multiplexing scheme IHON was firstly proposed to implement statistical multiplexing of the GST (Guaranteed Service Traffic) and SM (Statistical Multiplexed) in Ethernet packet-based nodes [7]. In IHON, a small fixed delay (∆) is added to guaranteed traffic (GST) so that statistically multiplexed (SM) traffic can be inserted in GST gaps, with minimum delay and zero PDV (Figure 2), as it was experimentally proved in [18]. With the aim to minimize the delay of GST traffic, IHON can be extended to allow GST traffic pre-emption on SM traffic and the effectiveness of this mechanism was analyzed in [20].…”

Converged Fronthaul/Backhaul based on Integrated Hybrid Optical Networks

“…IHON was first proposed in [4], analyzed in [5] and experimentally proved in [6]. It consists of a packet-based technique which can be implemented in an Ethernet switch, enhanced with guaranteed time transparent service.…”