Fixedmobile Convergence: Structural convergence OpSmal baseband - PowerPoint PPT Presentation

Fixed–mobile Convergence: Structural convergence OpSmal baseband unit placement 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 InternaSonal, Inc., Hungary Stephan Pachnicke ADVA OpScal Networking SE, Germany Björn Skubic Ericsson Research, Sweden Jose Torrijos Gijón Telefónica InvesSgación 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 1 1

Different levels of centralisation RU RU RU are possible for C-RAN RU RU RU µ RU µ RU – Wide C-RAN RU switch fabric RU centralised RU – Macrocells + µ RU processing node (DU pool HetNets – Micro-small cell µ RU µ RU µ RU – Outdoor: Local C-RAN – Indoor: Private C-RAN RU RU BBU: Baseband Unit RU DU: Digital Unit RU: Radio Unit µ RU µ RU µ RU RU RU RU µ RU µ RU µ RU BBU µ RU µ RU µ RU µ RU µ RU BBU IEEE HPSR Conference | Budapest, 2015 July 1-4 | FMC Tutorial | Structural Convergence 2 2

Where is the opSmal BBU hotel locaSon? 150 µs RTT limit StaLsLcs based on about 9000 antenna sites in as rule of high density areas in a typical European country thumb from RAN vendors antenna site number (%) Cumulated Core CO IP Mobile Backbone node Main CO 400 µs Link length between antenna site and nearest CO (km) RTT limit IEEE HPSR Conference | Budapest, 2015 July 1-4 | FMC Tutorial | Structural Convergence 3 3

Where is the opSmal BBU hotel locaSon? Fronthaul requires very low delay between RRH and BBU of << 1 ms! AssumpLons x 100 x <10 x > 15k x 1000 § Fibre propagaLon delay only Central Office (CO) Main CO Core CO (ideal data processing of negligible Lme assumed) 100% § Tolerable round-trip latency typically < 5 km between RRH to BBU: Values of < 400 µs are ~ 100/99/96% expected (eq. 40 km). RAN (urban/suburban/rural) vendors may restrict this to a lower value. § Typical distance to a Main CO < 37% is less than 20 km for more than 90% of all households. LTE HARQ delay requirement puts severe limit on BBU placement in a converged network IEEE HPSR Conference | Budapest, 2015 July 1-4 | FMC Tutorial | Structural Convergence 4 4

Presented by Annie Gravey annie.gravey@telecom-bretagne.eu Péter Olaszi peter.olaszi@aiSa.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 InternaSonal, Inc., Hungary Stephan Pachnicke ADVA OpScal Networking SE, Germany Björn Skubic Ericsson Research, Sweden Jose Torrijos Gijón Telefónica InvesSgación 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 5 5