How to tackle 5G challenges Dr. Dominique Noguet Head of Communication and Security Technologies Dpt CEA-LETI Dr. Emilio Calvanese Strinati Smart Devices & Telecommunications Strategy Program Director CEA-LETI
Towards an hyper-connected word Between 2010 and 2020, global mobile data traffic is expected to increase by 1000 fold. In 2015, 2/3 of the world s mobile traffic will be video. In this time scale, one second of video traffic upload on the network will take one person 2 years to watch. More and more data traffic from users Source: Cisco Visual Networking Index (VNI) Global Mobile Data Traffic Forecast for 2012 to 2017. Cisco, 2013 September 2014 2
How to find more spectrum resource? New dedicated licensed bands (e.g., spectrum under discussion towards WRC-15) Issue: limited opportunities below 6 GHz Spectrum Sharing (e.g. Licensed Shared Access in 2.3-2.4 GHz in Europe) New mmwave spectrum (> 10GHz, mainly 60-90 GHz, 200-300GHz, or above, licensed/unlicensed) New rules for unlicensed Spectrum for WiFi (5 GHz) or TVWS September 2014 3
Challenge Approach Issue Challenges to avoid the spectrum crunch while coping with traffic demand boom? More (Heterogeneous) demands (higher rates, more users, new usage, machine type traffic) Better frequency usage over 3D space/time Explore higher frequencies (eg. mmw, VLC) More cells, HetNets, smaller cells eg femtos More and more systems/users in unlicensed bands New modulations/ DSA / cognitive / white spaces Link budget / coverage range/ low power / integration Interference / signaling / cooperation/ backhaul / Energy Coexistence / M2M / Satellite / IoT September 2014 4
Interference management, densification, macro vs small cells Enablers for 5G systems (better efficiency) Cooperative communication systems, heterogeneous deployments, green radio New waveforms, fragmented spectrum, multi-band From signal processing and algorithms to real-time HW/SW proof of concept prototyping Femto-cells and Small-cells (better planing & SONs) Focus on interference reduction/handling related to deployment Interference management of interference from femto to macro / femto to femto / femtos to macro Radio Resource Management (RRM) : inter-cell interference management, and resource allocation Fog-cloud : exploiting the presence of dense distributed network edge intelligence Local processing offloading (network/ terminals/ sensors) Distributed Network optimization Advance cooperative solutions (network/ terminals/ sensors) D2D empowering September 2014 5
Multi-Band HetNet to address more bands Highly integrated devices mmwaves RAN (5Gbps) and backhaul (10Gbps aggregated throughput) Single-Band Multi-band 2GHz band Macro: Pico: LTE Center freq: 2GHz BW: ρ 10MHz Tx power: 46dBm Center freq: 2GHz BW: (1-ρ) 10MHz Tx power: 24dBm 3GHz band Macro: Pico: LTE-A Rel12 Center freq: 2GHz BW: 10MHz Tx power: 46dBm Center freq: 3.5GHz BW: 100MHz Tx power: 30dBm 60GHz band Macro: Center freq: 2GHz BW: 10MHz Tx power: 46dBm Pico: New bands Center freq: 60GHz BW: 2.16GHz Tx power: 10dBm September 2014 6
State-of-the-Art mmw Radio Modules 60-GHz transceiver for short-range comm. (CEA-LETI) Operates over the 4 IEEE channels between 57 and 66 GHz. Small size (6.5x6.5x0.6 mm 3 ); low power consumption (<1 W). Up to 7 Gbps (OFDM 16QAM) over 1 m range; longer distances can be reached at lower data rates or with a focusing lens. Application: cellphones, UE, tablets, etc. RFIC Top Bottom Y. Lamy, et al., "A compact 3D silicon interposer package with integrated antenna for 60 GHz wireless applications," IEEE Int. 3D Systems Integration Conference (3DIC), Oct. 2-4, 2013, San Francisco, CA, USA. September 2014 7
Visible Light Communication Use off-the-shelf LED (rapid market growth) Clean communication (no EMF) Compliant with ultra densification (atocell concept) 300 THz new unlicensed spectrum Indoor / outdoor / backhaul application Deliver 1000 times greater area spectral efficiency [bits/s/hz/m 2 ] compared to state-of-the-art LTE femto cells Between few 100Mbps and 20 Gbps expected Support of 100 times more devices by exploiting LED based Beamforming Tx LiFi AC Alim Tektro 45V DC AC+DC Bias-T 1 à 3m APD Rx LiFi September 2014 8 Video Display
New modulation for efficient spectrum usage Non orthogonal modulation (FBMC) Prototype filter optimized for time/freq localization tradeoffs Ability to shape deep spectrum notch (fragmented spectrum) Fits stringent TVWS ACLR requirements Spectral efficiency optimization Efficient implementation Strict time and freq synchronization no longer needed Suitable to CoMP techniques with limited signaling frequency User 1 User 2 User 3 User 4 time September 2014 9
Conclusion Higher capacity is a major challenge for future wireless technology Traditional licensed model is still a major ingredient but limited opportunities under 6GHz band are available Several new avenues need to be explored Spectrum usage models (DSA, sharing, LSA) mmwaves, VLC, new spectrum opportunities New radio technologies for better interference management, fragmented spectrum usage, lower signaling Regulation is also a major factor for growth September 2014 11
Thank you for your attention dominique.noguet@cea.fr emilio.calvanese-strinati@cea.fr