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#D4CB95 #D4CB95
Copyright © 2014 by HFR, Inc. All rights reserved. No part of this publicaHon may be reproduced, stored in a retrieval system, or transmiJed in any form or by any means —
electronic, mechanical, photocopying, recording, or otherwise — without the permission of HFR.
HFR, Inc. Peter K. Cho
Sep. 2014
C-‐RAN architectures toward next generaHon
ECOC2014 WS5: Is NG-‐PON2 an ulHmate access soluHons? Is there anything coming aXerwards?
#D4CB95 #D4CB95 + D-RAN vs. C-RAN
§ D-RAN (Distributed RAN) : Standalone BTS where both baseband unit (BBU) and remote radio head (RRH) are co-located in a cell site. The stable power supply and A/C facilities are required in a cell site.
• C-RAN (Centralized RAN) : For centralized baseband processing and easy maintenance, BBU moves to the central office from a cell site.
• “C” of C-RAN extended to “Cooperative Radio”, “Cloud Computing”, and “Clean Systems”
Copyright ⓒ 2014 HFR Confidential 2
#D4CB95 #D4CB95
3 Copyright ⓒ 2014 HFR ConfidenHal
Fronthaul Solu,on Demands
C-‐RAN Evolu,on Scenario
※ the number of C-RAN macrocell sites new addition (Source : Maravedis, 2013)
38,000 sites
59,000 sites
62,000 sites
58,000 sites
51,000 sites
Prospect of C-‐RAN and Fronthaul
#D4CB95 #D4CB95
7 Copyright ⓒ 2014 HFR ConfidenHal
CWDM Lambda Allocation (1)
1270 nm
O-‐Band
1290 nm
1310 nm
1330 nm
1350 nm
1370 nm
1390 nm
1410 nm
1430 nm
1450 nm
1470 nm
S-‐Band
1490 nm
1510 nm
1530 nm
C-‐Band
1550 nm
1570 nm
L-‐Band
1590 nm
1610 nm
E-‐Band
Water-peak
General CWDM Lambdas (16 lambdas)
6WL or 2WL CWDM Lambdas (72 lambdas) : Non-Standard Technology
1270 nm
O-‐Band
1290 nm
1310 nm
1330 nm
1350 nm
1370 nm
1390 nm
1410 nm
1430 nm
1450 nm
1470 nm
S-‐Band
1490 nm
1510 nm
1530 nm
C-‐Band
1550 nm
1570 nm
L-‐Band
1590 nm
1610 nm
E-‐Band
Water-peak Reserved for DWDM
• 6WL : 12 General CWDM lambda x 6 = 72 lambdas • 2WL : 12 General CWDM lambda x 2 = 24 lambdas
#D4CB95 #D4CB95
8 Copyright ⓒ 2014 HFR ConfidenHal
CWDM Lambda Allocation (2): 6WL
Parameters Wavelength Remarks
λC 1271/1291/1311/1331/1351/1411nm 1431/1451/1471/1491/1511/1591nm
λ1 λC - 3.05
λ2 λC - 1.45
λ3 λC + 0.15
λ4 λC + 1.75
λ5 λC + 3.35
λ6 λC + 4.95
λ6λ5λ4λ3λ2λ1λC - 7.5nm λC + 7.5nm
1.6nm 1.6nm 1.6nm 1.6nm 1.6nm
0.4nm
(CPRI 36 ch)
#D4CB95 #D4CB95 HetNet Deployment Scenario
• Macro Cell : C-‐RAN • Small Cell : Backhaul based on Fiber or Microwave Backhaul • Small Cell RRH : CPRI over Fiber or CPRI over Microwave(under 400M) • WiFi : Ethernet Backhaul
Copyright ⓒ 2014 GB ConfidenHal 9
#D4CB95 #D4CB95 Epilog
• No doubt, C-‐RAN shall be the majority of Radio Access Network of MNOs. – No one solu<on but various combina<on dependent on MNO – Co-‐exit C-‐RAN and Tradi<onal Technologies
• Network flexibility in Backhaul and Fronthaul technologies • HetNet for Macro, Micro, Pico, Femto cell
– MNOs shall define own C-‐RAN topologies. – New transmission technologies
• Extended WDM : 6WL CWDM + DWDM • OTN, NG-‐PON2, Milimeter wireless
• C-‐RAN shall improve Radio performance – CoMP, IC-‐IC, eIC-‐IC
• Moving from Centralized RAN to Cloud RAN – Accelera<ng virtualiza<on of the baseband processing – Ready for so`ware defined network
Copyright ⓒ 2014 GB ConfidenHal 12
CoMP: Coordinated MulHPoint IC-‐IC: Inter Cell Interference CoordinaHon