Fixedmobile Convergence: Structural convergence Impact of radio - PowerPoint PPT Presentation

Fixed–mobile Convergence: Structural convergence Impact of radio coordinaTon on design of access and aggregaTon network Dirk Breuer Deutsche Telekom Laboratories, Germany Tibor Cinkler Budapest University of Technology and Economics, Hungary Stéphane Gosselin Orange R&D, France Annie Gravey Telecom Bretagne, France Ali Hamidian Ericsson Research, Sweden Stefan Höst Lund University, Sweden Tahar Mamouni Orange R&D, France Péter Olaszi AITIA InternaTonal, Inc., Hungary Stephan Pachnicke ADVA OpTcal Networking SE, Germany Björn Skubic Ericsson Research, Sweden Jose Torrijos Gijón Telefónica InvesTgación y Desarrollo, Spain Erik Weis, Frank Geilhardt, Thomas Monath, Sandro Krauß Deutsche Telekom Laboratories, Germany This ongoing work receives funding from the European Union's Seventh Framework Programme (FP7/2007-2013) under grant agreement n° 317762 “COMBO project” IEEE HPSR Conference | Budapest, 2015 July 1-4 | FMC Tutorial | Structural Convergence 1 1

Small cell deployment requires coordinaTon Heterogeneous networks CoordinaGon is key § CreaGon of interference § CoordinaGon between Macro Base StaGons and Small Cells is required for co- channel operaGon, opGonal for dedicated channel deployment § Many different coordinaGon schemes and algorithms with different requirements on the backhaul § Simplest schemes also work via tradiGonal backhaul • Significant capacity increase requires co-ordinaGon between small cells and macro sites in co-channel operaGon • CoordinaGon for eNodeB is done via X2 interface IEEE HPSR Conference | Budapest, 2015 July 1-4 | FMC Tutorial | Structural Convergence 2 2

CoordinaTon gains in heterogeneous deployments Coordina(on Coordina(on Feature Max Throughput Max Capacity Delay Class Classifica(on Gain Gain Very Tight Fast uplink CoMP High High 0.1-0.5 ms CoordinaGon (uplink joint recepGon/ selecGon) Fast downlink CoMP Medium Medium (coordinated link adaptaGon, coordinated scheduling, coordinated beamforming, dynamic point selecGon) Combined Cell Medium Tight Slow uplink CoMP Medium Small 1-20 ms CoordinaGon Slow downlink CoMP Small (e.g., Postponed Dynamic Point Blanking) Moderate FeICIC Medium Small 20-50 ms CoordinaGon Small gain: ≤20% Medium gain: 20-50 % High gain: ≥ 50% IEEE HPSR Conference | Budapest, 2015 July 1-4 | FMC Tutorial | Structural Convergence 3 3

Backhaul and fronthaul with CoMP coordinaTon via X2-Interface Backhaul Fronthaul § An interconnecGon of X2 interface § X2 interfaces are collocated, required, link distances between X2 delay close to zero sites will cause delay. § Fulfils inherently X2 delay § To support CoMP delay < 0.5 ms requirements for CoMP < 0.5 ms requires interconnecGon of CO or § RRU-BBU delay << 1 ms (typically Main CO locaGon 0.4 ms assumed) § Backhaul: X2 connecGon on CO/Main CO needs to support CoMP with delay < 0.5 ms § Fronthaul: Fulfils inherently X2 delay requirements for CoMP < 0.5 ms IEEE HPSR Conference | Budapest, 2015 July 1-4 | FMC Tutorial | Structural Convergence 4 4

RAN topology examples All Backhaul (BH) Mix of SC FH and MBS BH Source : NGMN Alliance, RAN EvoluGon Project, Backhaul and Fronthaul EvoluGon, May 2014 IEEE HPSR Conference | Budapest, 2015 July 1-4 | FMC Tutorial | Structural Convergence 5 5

CoordinaTon architectures overview CoMP architectures – Wireless backhaul / fronthaul soluGons not in focus Mix of SC FH Backhaul Fronthaul & MBS BH Backhaul Backhaul Mix FH BBUH & Mix Centralised Controller BBUH & Controller in BBUH & Controller at MBS Controller Main CO Controller in Main at MBS CO BH BH Mix BH BH BH Mix SC direct SC direct SC CPRI & Controller Controller Xn/X2 SC CPRI & Xn & MBS Xn & MBS MBS Ctrl. in Main in Core interface MBS X2 X2 over Ctrl. in in Main CO over BNG over BNG BNG Main CO CO MBS: Macro base StaGon BBU: Baseband Unit CoMP: Coordinated MulGpoint IEEE HPSR Conference | Budapest, 2015 July 1-4 | FMC Tutorial | Structural Convergence 6 6

Backhaul architecture scenario: Controller at the Main Central Office MBS: Macro Base StaGon SC: Small Cell ODF: OpGcal DistribuGon Frame (pure passive) CO: Central Office BNG: Broadband Network Gateway – Centralised controller at Main CO for coordinaGon (RTT < 400 μs) – Bypassing BNG via direct terminaGon of access links at controller to fulfil the CoMP latency requirements – This variant aims at an ideal backhaul with very low latency – This variant could be combined with decentralisaGon of mobile core funcGonaliGes IEEE HPSR Conference | Budapest, 2015 July 1-4 | FMC Tutorial | Structural Convergence 7 7

Fronthaul architecture scenario: BBU hotel & controller at the Main CO CPRI: Common Public Radio Interface MBS: Macro Base StaGon ; SC: Small Cell ODF: OpGcal DistribuGon Frame (pure passive) CO: Central Office BNG: Broadband Network Gateway – BBU hotel and central controller in Main CO for baseband processing and coordinaGon – Bypassing BNG via direct terminaGon of Fronthaul links at BBU hotel – Very low latency < 400 µs (RTT) and high CPRI data rate allow inherent CoMP scheme support IEEE HPSR Conference | Budapest, 2015 July 1-4 | FMC Tutorial | Structural Convergence 8 8

Presented by Annie Gravey annie.gravey@telecom-bretagne.eu Péter Olaszi peter.olaszi@aiTa.ai Björn Skubic bjorn.skubic@ericsson.com Dirk Breuer Deutsche Telekom Laboratories, Germany Tibor Cinkler Budapest University of Technology and Economics, Hungary Stéphane Gosselin Orange R&D, France Annie Gravey Telecom Bretagne, France Ali Hamidian Ericsson Research, Sweden Stefan Höst Lund University, Sweden Tahar Mamouni Orange R&D, France Péter Olaszi AITIA InternaTonal, Inc., Hungary Stephan Pachnicke ADVA OpTcal Networking SE, Germany Björn Skubic Ericsson Research, Sweden Jose Torrijos Gijón Telefónica InvesTgación y Desarrollo, Spain This ongoing work receives funding from the European Union's Seventh Framework Programme (FP7/2007-2013) under grant agreement n° 317762 “COMBO project” IEEE HPSR Conference | Budapest, 2015 July 1-4 | FMC Tutorial | Structural Convergence 9 9