WOS1 – Wireless and Optical Backhaul

Tuesday, 19 June 2018, 11:30-13:00, E4 hall
Session chair: Boštjan Batagelj (University of Ljubljana & Faculty of Electrical Engineering, Slovenia)


11:30 – Software Defined Control of Tunable Optical Transceivers Using NETCONF and YANG

Sean Ahearne and Yuliya Verbishchuk (University College Cork & Tyndall National Institute, Ireland); Fatima C Garcia-Gunning (Tyndall National Institute & University College Cork, Ireland); Cormac J. Sreenan (University College Cork, Ireland)
Network infrastructure both intra and inter datacenter continues to increase in scale with the increasing demand for bandwidth and the target performance goals for 5G networks. However the scalability of current Dense Wavelength Division Multiplexing (DWDM) systems is threatened by poor control system flexibility, requiring increasingly more complex management systems as optical network infrastructure expands. It is increasingly important to have software systems that are capable of managing such networks very efficiently on a large scale. The ability to use tunable wavelength optical transceivers in a DWDM network greatly increases its flexibility and bandwidth efficiency. This paper details the creation of a software system capable of controlling tunable optical transceivers using the network configuration protocol NETCONF and its associated data model, Yet Another Next Generation (YANG). This approach can be beneficial versus other configuration protocols such as OpenFlow, as it can be implemented without disrupting existing routes in the network. The YANG module developed is capable of controlling the wavelength of tunable transceivers. This is a new method of interacting with these transceivers in a Software Defined Network (SDN). The addition of another south-bound API allows for greater flexibility in an SDN DWDM network. The system developed could successfully tune the wavelength of the transceivers via NETCONF with the results verified using optical spectrum analysis.



11:48 – Grade of Service in UDWDM-PON with Statistical Wavelength Subscribing

Josep Segarra, Vicent Sales and Josep Prat (UPC, Spain)
The Grade of Service (GoS) or ONU rejection probability in coherent UDWDM-PONs with ONU lasers under limited tunability is evaluated. Each active ONU is assigned an exclusive wavelength channel, which is managed by heuristic Wavelength Assignment (WA) schemes. With a take rate of 90%, GoS values below 0.1% are achieved, but when statistical subscribing is considered, the GoS is dramatically improved.



12:06 – Application of an Opto-Electronic Oscillator in 5G Mobile and Wireless Networks with a Low Frequency Drift, a High Side-Modes-Suppression Ratio and Without a Power Penalty Due to Chromatic Dispersion

Mehmet Alp Ilgaz (University of Ljubljana, Slovenia); Bostjan Batagelj (University of Ljubljana & Faculty of Electrical Engineering, Slovenia)
This paper describes and discusses an application for the next generation of 5G mobile and wireless networks. The application of a single-loop, opto-electronic oscillator is designed for 39 GHz and will be implemented in the central office of a 5G network. The aim of this configuration is to decrease the complexity of the base stations for a next-generation system and provide an economic advantage for 5G networks. The system is designed to avoid the power penalty due to the chromatic dispersion, is temperature stabilized to have a long-term stability and has a low side-modes effect to ensure a low phase noise.



12:24 – Meshed Backhauling of Small Cells Using IEEE802.11ad at 60GHz

Peter J Legg and Ray McConnell (Blu Wireless Technology, United Kingdom (Great Britain))
Wireless backhaul to small cells and remote radio heads is a key enabler for the cost-effective deployment of LTE-advanced and 5G when fibre is too costly. This paper presents a study of a millimetre-wave meshed backhaul deployment using a dynamic system simulator. IEEE 802.11ad technology at 60GHz is assumed. Results demonstrate the viability of the technology over multiple-hops (up to four in the example studied), and shows the influence of the number of points of presence (POPs) and the number of radio channels available. The latency of the backhaul is approximately 0.5 ms per hop.



12:42 – Architecture Options for Satellite Integration into 5G Networks

Boris Tiomela Jou (Airbus Defence and Space, France); Oriol Vidal (Airbus Defense and Space, France); Fabrice Arnal (Thales Alenia Space, France); Konstantinos Liolis (SES, Luxembourg); Mael Boutin (Broadpeak, France); Joe Cahill (iDirect, France); Pouria Sayyad Khodashenas (i2CAT Foundation (i2CAT), Spain); Jean-Michel Houssin (Thales Alenia Space, France); Hamzeh Khalili (Fundació i2CAT, Internet i Innovació Digital a Catalunya, Spain); Duy Kha Chau (Broadpeak, France); Salva Diaz Sendra (British Telecom, United Kingdom (Great Britain))
Integration of satellite networks into 5G is considered a crucial endeavour to fully satisfy the challenging 5G connectivity requirements. In the frame of the SaT5G (Satellite and Terrestrial Network for 5G) project, advanced and innovative architecture concepts are discussed in this paper aiming at fostering satellite seamless integration within 5G networks and therefore, enabling high-value attractive solutions for satellite and terrestrial stakeholders. These options need to be further analysed and confronted to technical and economical requirements in order to propose a framework for integrated network design.