DISCUS will present a demonstration of a reconfigurable DWDM Long-Reach PON at ECOC 2015 at the Polatis both, number 311

The testbed demonstrates the operations of an access/metro node, showcasing a fully integrated 10Gb/s symmetric PON architecture comprised of physical layer transmission (with 10Gb/s burst mode components, wavelength reconfigurability, extended reach and switching technology) and Layer-2 protocols at the ONU and OLT, controlled by an SDN access control plane capable of satisfying on-demand user requests, such as 4K definition Video-on-Demand applications.The DISCUS showcase will also present the chosen architecture and the rational for some of the recent modelling results.

Focus Sessions on Advances in Optical Networking at PIERS organized by DISCUS partners


Organizers: Dr. Jiajia Chen, KTH Royal Institute of Technology, Sweden Prof. David B. Payne, Trinity College, Ireland; Aston University, UK Prof. Lena Wosinska, KTH Royal Institute of Technology, Sweden

DISCUS partners organized two focus sessions at PIERS on 25-26 August 2014, in Guangzhou, China. Progress in Electromagnetics Research Symposium (PIERS) provides an international forum for reporting progress and recent advances in all aspects of electromagnetics. Spectra range from statics to radio frequency, microwave, photonics, and beyond. It has been widely recognized that photonic communications technologies can provide cost- and energy-efficient transport solutions to deliver ultra-high bandwidth to the Internet users. In addition, new applications require networks with predictable characteristics and behavior. The inability of the current Internet infrastructure to cope with the wide variety and the rapidly growing number of users, emerging network applications and traffic patterns is leading to the need for new network models, architectures and protocols to meet the requirements of the Network of the Future. These sessions address the challenges and recent advances in optical networking, which is in line with DISCUS focus. This is the first year that the topic of optical networking is included in PIERS. There are in total 3 keynote speeches, 8 invited talks and 5 contribution papers presented in the sessions.

KTH proposes flexible and reliable hybrid microwave and fiber mobile backhaul architecture

Optical-fiber-based backhauling offers a future proof solution to handle rapidly increasing traffic in wireless access networks and outperforms other existing backhauling technologies, such as microwave and copper, in terms of capacity, scalability, and sustainability. However, the deployment cost of fiber infrastructure is relatively high and it may be difficult to provide a cost efficient and flexible protection strategy for a fiber backhauling network. Considering that protection is very important to avoid service interruption in a high-capacity mobile backhauling network, within DISCUS KTH proposes a hybrid fiber and microwave protection scheme for mobile backhauling based on a passive optical network (PON). The proposed reliable architecture is compatible with any wavelength division multiplexing (WDM)-based PON, e.g., pure WDM PON and a hybrid time and wavelength division multiplexing (TWDM) PON, offering high flexibility and relatively low deployment cost. The backup for the feeder fiber is provided by dual homing based on key idea from DISCUS for long reach PON, while the protection of the distribution section can be established via a microwave connection between two base stations in case high reliability performance is required, e.g., for macrocells covering large service areas. KTH has carried out an extensive assessment of our approach in terms of connection availability, failure impact, complexity, and flexibility in providing resiliency. We also show a comparison with other existing solutions. The evaluation results confirm that our scheme can achieve relatively high flexibility and reliability performance while maintaining low complexity compared with the existing approaches.

Yanpeng Yang, Ki Won Sung, Lena Wosinska, and Jiajia Chen, “Hybrid Fiber and Microwave Protection for Mobile Backhauling”, IEEE/OSA Journal of Optical Communications and Networking, Vol. 6, Issue 10, pp. 869-878 (2014).

Two DISCUS papers accepted at ICTAI 2014

The annual IEEE International Conference on Tools with Artificial Intelligence (ICTAI) provides a major international forum where the creation and exchange of ideas related to artificial intelligence are fostered among academia, industry, and government agencies. The conference facilitates the cross-fertilization of these ideas and promotes their transfer into practical tools, for developing intelligent systems and pursuing artificial intelligence applications. The ICTAI encompasses all technical aspects of specifying, developing and evaluating the theoretical underpinnings and applied mechanisms of the AI-based components of computer tools such as algorithms, architectures and languages. Two papers from DISCUS presenting results at the level of the access and core network were accepted this year:

  • Alejandro Arbelaez, Deepak Mehta, Barry O'Sullivan and Luis Quesada. Constraint Based Local Search for Distance and Capacity Bounded Network Design Problem.

  • Deepak Mehta, Barry O'Sullivan, Cemalettin Ozturk, Luis Quesada and Helmut Simonis. Designing an Optical Island in the Core Network: From Routing to Spectrum Allocation.