Centralized RAN (C-RAN): What is It and Why You Should Care

Download Centralized RAN (C-RAN): What is It and Why You Should Care

Post on 30-Oct-2015




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C-RAN is just another form of Small Cell. The main C-RAN challenge is fronthaul. But fronthaul makes it difficult to reach RRU locations (mostly urban), is dependent of non-traditional deployments (e.g., street furniture, non-tower) and CPRI interfaces creates new challenges (e.g., capacity, latency, management). Therefore, new innovations in wireless transport will be required to make fronthaul and C-RANs feasible.


<ul><li><p>Centralized RAN </p><p>(C-RAN) </p><p> WHAT IS IT? </p><p>AND WHY SHOULD YOU CARE? </p><p> Paul Kennard, CTO </p><p>June 13, 2013 </p></li><li><p>AVIAT NETWORKS </p><p>THE DATA STORM </p><p>low or stable average revenue per user LOW ARPU </p><p>NEW DEVICES </p><p>NETWORK COSTS </p><p>NEW CONSUMERS explosion of smart phones, tablets </p><p>and other mobile devices </p><p>increased network CAPEX and OPEX </p><p>5 billion consumers will have </p><p>access to internet </p></li><li><p>AVIAT NETWORKS </p><p>DENSER NETWORKS </p><p>This has several problems: </p><p>How to meet the required coverage </p><p>and capacity? </p><p>How to deal with interference? </p><p>How to manage increased complexity: </p><p>To increase spectral efficiency? </p><p>To manage customers data? </p><p>To deal with higher CAPEX and </p><p>OPEX? </p><p>the only way to deal with the data storm is to have denser wireless networks with ever increasing spectral efficiency </p></li><li><p>AVIAT NETWORKS </p><p>STRATEGIES FOR DENSER NETWORKS </p><p>RAN DECENTRALIZATION (HetNet) TRADITIONAL MACRO CELLS </p><p> SMALL CELLS, SON </p><p>BACKHAUL </p><p>RAN CENTRALIZATION (C-RAN) DISTRIBUTED ANTENNAS (DAS) </p><p> REMOTE RADIO HEADS (RRH) </p><p>FRONTHAUL </p><p>WiFi OFFLOAD OFFLOAD </p></li><li><p>AVIAT NETWORKS </p><p>CENTRALIZED RAN (C-RAN) TERMINOLOGY </p></li><li><p>AVIAT NETWORKS </p><p>Source: NGMN </p><p>C-RAN IMPLEMENTATION JUST ANOTHER FORM OF SMALL CELL </p><p>TRADITIONAL MACRO CELL DEPLOYMENT CELL SPLIT USING FRONT HAUL </p></li><li><p>AVIAT NETWORKS </p><p>ADVANTAGES OF C-RAN </p><p> Resource pooling </p><p> Greener infrastructure (re-use) </p><p> Base station virtualization </p><p> Simplified management and operation </p><p> Coordination for interference mitigation (ICIC) </p><p> Multi technology support </p><p> No GPS in each remote site </p></li><li><p>AVIAT NETWORKS </p><p>MAIN C-RAN CHALLENGE IS FRONTHAUL </p><p> Difficult to reach RRU locations </p><p>(mostly urban) </p><p> Non traditional deployments </p><p>(street furniture, non-tower) </p><p> CPRI interface creates new challenges </p><p>(capacity, latency, management, etc) </p><p>PLUS FIBER IS NOT EVERYWHERE, </p><p>AND NOT FOR FREE SO WIRELESS SOLUTIONS FOR </p><p>FRONTHAUL WILL BE NEEDED</p><p>PLUS FIBER IS NOT EVERYWHERE, </p><p>AND NOT FOR FREE SO WIRELESS SOLUTIONS FOR </p><p>FRONTHAUL WILL BE NEEDED </p></li><li><p>AVIAT NETWORKS </p><p>BUT CAPACITY AND LATENCY REQUIREMENTS PUSH THE </p><p>BOUNDARIES OF WIRELESS TECHNOLOGIES </p><p>Latency </p><p>CORE CPRI </p><p>BBU </p><p>TRANSMISSION MEDIUM (FIBER / MICROWAVE) </p><p>RRH </p><p>IP BACKHAUL </p><p>RRH </p><p>CPRI CPRI </p></li><li><p>AVIAT NETWORKS </p><p>WHICH MEANS NEW INNOVATIONS (IN WIRELESS TRANSPORT) </p><p>WILL BE REQUIRED </p><p>smaller </p><p>faster </p><p>low power </p><p>higher capacity </p><p>lower latency </p><p>cheaper </p></li><li><p>AVIAT NETWORKS </p><p>C-RAN offers many benefits for </p><p>operators however Fronthaul challenges </p><p>need to be addressed to make it a reality </p></li><li><p>W W W . AV I AT N E T W O R K S . C O M </p></li></ul>