Advanced spectrum management in 5G+ networks
7th March 2018 | BT Centre, London, UK
The SPEED-5G workshop at BT Centre in London presented novel results of international research projects on selected aspects of 5G and beyond networks. The main focus was on dynamic spectrum access techniques. The workshop attracted an international audience from both industry and academia. The 55 attendees witnessed technical presentations in the lecture room as well as live demonstrations of some key SPEED-5G results in adjacent rooms.
Click on the presentation titles to access the slides
10:00 – 10:10 Welcome and run through of day – Michael Fitch, BT
10:10 – 10:40 Keynote – Jonathan Legh-Smith, head of partnerships and strategic research, BT
10:40 – 11:00 SPEED-5G overview and main technical achievements – Klaus Moessner, University of Surrey
11:00 – 11:15 What demos are we showing and why – Andreas Georgakopoulos, WINGS
11:15 – 11:45 Speed-5G MAC innovations – Benoit Miscopein, CEA-Leti
11:45 – 13:00 Opportunity to see the demos while having buffet lunch
Demo 1 – Video
Demo 2 – Video
13:00 – 13:30 Speed-5G RRM innovations – Andreas Georgakopoulos, WINGS
13:30 – 14:30 Talks from other projects
- 5G-MiEdge – Valerio Frascolla, Intel 5G-MiEdge Website
- 5G-MoNArch – Kostas Konstantinou, Real Wireless 5G-MoNArch Website
- 5G-Xcast – Rory Turnbull, BT 5G-Xcast Website
14:30 – 15:00 Coffee and further opportunity to see demos
15:00 – 15:45 Panel session – Spectrum management in 5G+ networks
- Simon Pike, Technical Advisor to the 5G Testbeds and Trials programme at Department for Digital, Culture, Media and Sport (DCMS)
- Andrew Stirling, Larkhill Consultancy
- Stephen Temple, Mobile Policy Analyst Expert (5GIC)
- Klaus Moessner, University of Surrey, SPEED-5G coordinator
Moderator: Michael Fitch, BT
15:45 – 16:00 Wrap-up
The live demonstrations were available during the whole workshop day in dedicated rooms for interested participants, running in parallel to the presentations held in the lecture room.
Demo 1: Combination of centralised and decentralized radio resource management with a novel MAC protocol for higher capacity in small cells
This demo shows how the SPEED-5G outcomes can be implemented to optimize the usage of spectrum resources and deliver the best QoS in dense heterogeneous networks in order. The demo relies on the hierarchical RRM framework which mixes both distributed and centralized RRM agents (dRRM and cRRM, respectively) and two multi-RAT small cells. Depending on the traffic load, the dRRM agent of a small cell may decide to offload some traffic on a channel of the 5 GHz unlicensed band, and notifies the cRRM agent about this decision. In order to avoid interference on the 5 GHz band, cRRM provides the other cell with a spectrum mask which prevents from transmitting on the same channel. In this demo, the second cell implements a novel MAC protocol based on post-LTE waveform and capable of autonomously selecting the least interfered channel on the 5GHz band. Relying on a mandatory listen-before-talk procedure and a channel selection based on reinforcement learning, this MAC protocol is able to apply the guideline of the cRRM and determine the best possible channel to transmit data to UEs, avoiding interference from other coexisting systems like WiFi access points and stations.
Demo 2: Exploitation of heterogeneous spectrum resources through tight integration of multiple RATs at MAC layer
In order to efficiently exploit heterogeneous spectrum resources, a tighter integration of multiple RATs such as LTE, WiFi, and new 5G NR that allows efficient use of licensed, unlicensed and lightly-licensed resources, is required. In the enhanced dynamic spectrum access (eDSA) framework, proposed in SPEEd-5G, a tighter integration of multiple RATs is accomplished at the MAC level, based on a MAC-level split, where the MAC layer is divided into two sub-layers, namely, higher MAC (HMAC) and lower MAC (LMAC). The HMAC and layers above are common to all RATs, and the HMAC supports new functional modules for inter-RAT resource scheduling at MAC level, whilst there are separate LMAC and PHY entities corresponding to each RAT.
The objective of this demonstration is to highlight project innovations related to inter-RAT e.g. LTE and WiFi, resource aggregation and traffic steering/offload, based on MAC-split solution. The results of aggregation based on MAC-split will also be compared with 3GPP legacy LWA implementation, which are used benchmarks. The demo setup represents a collocated scenario where common LTE EPC is connected to a single PC hosting LTE and WiFi via a switch. On the small-cell side, for LTE, an extension of OpenAirInterface (OAI) is adopted with USRP providing RF interface while COTs WiFi AP is used for providing the corresponding RF interface. On the UE side, a dual-interface terminal is emulated using NI Chassis hosting the extended OAI protocol stack and COTs WiFi device.