Open optical edge connecting mobile access networks
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The document discusses the importance of optical fiber connectivity in enhancing capacity for mobile access networks, particularly for 5G RAN. It outlines various optical layer options and transmission technologies while emphasizing the need for cost-effective and performance-oriented solutions. The presentation highlights future trends in optical transmission and the critical factors in RAN deployments.
Open optical edge connecting mobile access networks
- 1. Open optical edge connecting mobile access networks Jim Zou, global business development ECOC 2022 WS: Moving from optical components in RAN to optical components for RAN
- 2. © 2022 ADVA. All rights reserved. 2 Optical fiber connectivity is the key to flexible capacity growth Fixed X-haul transport for 5G RAN Microwave Fiber Copper ? RU 5GC Backhaul Carrier Ethernet (NG/Xn, S1/X2) Midhaul Ethernet (F1) Fronthaul eCPRI/Eth (Fx) DU CU 40-200 km <10 ms 20-40 km 1-2 ms 0-10 km 25-200 µs Source: O-RAN Alliance 1 2 4 8 16 Fx: 100MHz Sub6G 2.0 3.9 7.8 15.6 31.2 F1: 100MHz Sub6G 0.5 1.0 2.0 4.0 8.1 0.0 10.0 20.0 30.0 40.0 Bandwidth in Gb/s MIMO layers Single sector DL transport bandwidth (peak) Peak Average
- 3. © 2022 ADVA. All rights reserved. 3 • C-band vs O-band • Fixed vs tunable • Dark fibers • CWDM vs DWDM • TDM vs FDM • DML, EML, MZM, … • NRZ, PAM-x, DMT, CAP, … • IM/DD vs coherent • Advanced modulation formats • Equalization, shaping, EDC, … • FEC What are the optical layer options? Transmission technologies Wavelength windows Parallelism Modulation (Digital) signal processing A pragmatic approach is needed between cost and performance
- 4. © 2022 ADVA. All rights reserved. 4 ? Direct-detect 10G Direct-detect 25G Coherent 400G What’s next? Optical transmission evolution Coherent Edge 100G Longer reach Higher performance Lower reach Lower complexity and cheaper Core DU Backhaul Midhaul Fronthaul RU CU ?
- 5. © 2022 ADVA. All rights reserved. 5 Close the gap between IM/DD and coherent For optical edge/access interface Purpose-built solutions PAM-4 25G Coherent 100G
- 6. © 2022 ADVA. All rights reserved. 6 Important aspects of RAN deployments Power consumption Industrial temperature Module cost Module latency -40°C +85°C 25G Direct Detect “Coherent slicing” not viable 3W max Achievable Cost-effective Minor KR4- FEC latency 100ZR Coherent 5-6W max Achievable Relatively Expensive Optimized latency through DSP/FEC Too high-power consumption for SFP28 or even QSFP28 QSFP-DD/CFPx inefficient and expensive for only 25G-100G
- 7. © 2022 ADVA. All rights reserved. 7 Summary Edge access Edge aggregation Access always appreciates a simple and cost-efficient solution DWDM multiplexer DWDM multiplexer Nx25Gbit/s PAM4 DWDM 25Gbit/s wavelengths 100Gbit/s wavelengths … Headend Nx100Gbit/s Coherent DWDM DU/Router/ CCAP/ … … … Mobile access Broadband access Business services RPD RU Coherent 100ZR Direct-detection Coherent-detection PAM-4 25G
- 8. Thank you IMPORTANT NOTICE The content of this presentation is strictly confidential. ADVA is the exclusive owner or licensee of the content, material, and information in this presentation. Any reproduction, publication or reprint, in whole or in part, is strictly prohibited. The information in this presentation may not be accurate, complete or up to date, and is provided without warranties or representations of any kind, either express or implied. ADVA shall not be responsible for and disclaims any liability for any loss or damages, including without limitation, direct, indirect, incidental, consequential and special damages, alleged to have been caused by or in connection with using and/or relying on the information contained in this presentation. Copyright © for the entire content of this presentation: ADVA. jzou@adva.com
Editor's Notes
- #7: Add 100G option Any coherent system will at this point in time consume at least 12W Some ‘vendors’ talk about 25G coherent, but that really is not viable. You cannot get 12W power consumption in an SFP28 footprint and to do 25G in a QSFP28/QSFP-DD footprint is inefficient and expensive.