Fixedmobile Convergence: Structural convergence OpSmal baseband - - PowerPoint PPT Presentation

IEEE HPSR Conference | Budapest, 2015 July 1-4 | FMC Tutorial | Structural Convergence 1 1 This ongoing work receives funding from the European Union's Seventh Framework Programme (FP7/2007-2013) under grant agreement n° 317762 “COMBO project”

Fixed–mobile Convergence: Structural convergence OpSmal baseband unit placement

Dirk Breuer Tibor Cinkler Stéphane Gosselin Annie Gravey Ali Hamidian Stefan Höst Tahar Mamouni Péter Olaszi Stephan Pachnicke Björn Skubic Jose Torrijos Gijón Deutsche Telekom Laboratories, Germany Budapest University of Technology and Economics, Hungary Orange R&D, France Telecom Bretagne, France Ericsson Research, Sweden Lund University, Sweden Orange R&D, France AITIA InternaSonal, Inc., Hungary ADVA OpScal Networking SE, Germany Ericsson Research, Sweden Telefónica InvesSgación y Desarrollo, Spain

IEEE HPSR Conference | Budapest, 2015 July 1-4 | FMC Tutorial | Structural Convergence 2 2

Different levels of centralisation are possible for C-RAN

– Wide C-RAN

– Macrocells + HetNets

– Micro-small cell

– Outdoor: Local C-RAN – Indoor: Private C-RAN

RU RU RU RU

centralised processing node (DU pool

RU RU µRU µRU µRU µRU µRU µRU RU RU RU RU RU RU

switch fabric RU

BBU

RU RU µRU µRU µRU µRU µRU

BBU

µRU µRU µRU µRU µRU µRU

BBU: Baseband Unit DU: Digital Unit RU: Radio Unit

IEEE HPSR Conference | Budapest, 2015 July 1-4 | FMC Tutorial | Structural Convergence 3 3

Where is the opSmal BBU hotel locaSon?

StaLsLcs based on about 9000 antenna sites in high density areas in a typical European country

Link length between antenna site and nearest CO (km)

400 µs RTT limit

150 µs RTT limit as rule of thumb from RAN vendors Cumulated antenna site number (%)

Core CO IP Mobile Backbone node Main CO

IEEE HPSR Conference | Budapest, 2015 July 1-4 | FMC Tutorial | Structural Convergence 4 4

Where is the opSmal BBU hotel locaSon?

AssumpLons § Fibre propagaLon delay only (ideal data processing of negligible Lme assumed) § Tolerable round-trip latency between RRH to BBU: Values of < 400 µs are expected (eq. 40 km). RAN vendors may restrict this to a lower value. § Typical distance to a Main CO 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

Fronthaul requires very low delay between RRH and BBU of << 1 ms!

Central Office (CO) Main CO x 100 x 1000 Core CO x <10 x > 15k ~ 100/99/96% (urban/suburban/rural) < 37% 100% typically < 5 km

IEEE HPSR Conference | Budapest, 2015 July 1-4 | FMC Tutorial | Structural Convergence 5 5 This ongoing work receives funding from the European Union's Seventh Framework Programme (FP7/2007-2013) under grant agreement n° 317762 “COMBO project”

Presented by annie.gravey@telecom-bretagne.eu peter.olaszi@aiSa.ai bjorn.skubic@ericsson.com

Dirk Breuer Tibor Cinkler Stéphane Gosselin Annie Gravey Ali Hamidian Stefan Höst Tahar Mamouni Péter Olaszi Stephan Pachnicke Björn Skubic Jose Torrijos Gijón Deutsche Telekom Laboratories, Germany Budapest University of Technology and Economics, Hungary Orange R&D, France Telecom Bretagne, France Ericsson Research, Sweden Lund University, Sweden Orange R&D, France AITIA InternaSonal, Inc., Hungary ADVA OpScal Networking SE, Germany Ericsson Research, Sweden Telefónica InvesSgación y Desarrollo, Spain

Annie Gravey Péter Olaszi Björn Skubic