Comcores Radio over Ethernet Gateway for Future Fronthaul Networks - PowerPoint PPT Presentation

Comcores Radio over Ethernet Gateway for Future Fronthaul Networks FG IMT-2020 Workshop and Demo Day Anders Lund, Comcores ApS Bomin Li, Comcores ApS Thomas Nørgaard, Comcores ApS Confidential – Not to be Circulated www.comcores.com

Agenda  About Comcores  Motivation for Ethernet Based Fronthaul  Comcores Overview on next generation fronthaul networks  Demo setup  Demo results Comcores Headquarter 2 www.comcores.com Confidential – Not to be Circulated

About Comcores  Established in 2014  Globally oriented high-tech company, headquartered in Scion DTU Science Park, 20 min outside Copenhagen, Denmark  IP cores and design services for communication systems  Specialized in digital radio systems Comcores Headquarter 3 www.comcores.com Confidential – Not to be Circulated

Motivation for Ethernet Based Fronthaul  New fronthaul interface technologies are required to satisfy various RAN deployment and evolution requirements, and reduce fronthaul transmission costs  Current dedicated point-to-point connection between BBUs and RRUs (such as CPRI/OBSAI) will evolve to many-to-many fronthaul mainstream switch networks (such as Ethernet) due to cost, availability and flexibility  Fronthaul architecture is migrating from traditional RAN where single BBU connects to single/few RRUs to architectures where multiple centralized BBUs connect to multiple RRUs making a packet switched technology ideal  Ethernet is a widely adopted & nearly ubiquitous standard technology Radio Radio Eth CPRI Eth Eth Radio Baseband Packet Fronthaul Eth Radio Baseband Pool 4 www.comcores.com Confidential – Not to be Circulated

Comcores Overview on next generation fronthaul networks Time Sensitive Network RF Virtual BBU Pool RRH RF RRH (TSN) RF BaseBand BaseBand BaseBand Ethernet BaseBand Aggregator RRH RF CPRI CPRI fiber connection GW C&M Ethernet SDN Controller L1 Offload 5 www.comcores.com Confidential – Not to be Circulated

Comcores gateway  Fits on both radio and base band side  support of CPRI, new radio interface and high speed Ethernet Comcores RAU system Pico L1 offload Ethernet TSN MAC & Split 4 vBBU NGFI PCS RF/DFE RoE Split x Macro CPRI RAU RAU Backhaul RAU Ethernet Fronthaul Network (NGFI) Pico vBBU Macro Orchestrator RAU All-in-One Pico Ethernet TSN MAC & PCS L1 processing L2/L3 L1 processing L1 processing resources RoE processing L1 processing resources resources Comcores All-in-One RAU system resources resources Eth TSN MAC & vBBU RF/ NGFI PCS RoE Virtual L1 resource pool DFE Split x Virtual BBU 6 www.comcores.com Confidential – Not to be Circulated

Demo setup  IEEE P1914.3 - CPRI over Ethernet mapper/de-mapper  IEEE P1914.1 - Next Generation Fronthaul Interface  IEEE 802.3 - Time Sensitive Network features  IEEE 1588v2 – time stamp IEEE 1588v2 RRH Gateway BBU Gateway CPRI over Ethernet CPRI over Ethernet RoE RX RoE TX (Structure Aware) (Structure Aware) CPRI tester CPRI tester (Structure (Structure (Sarokal) (Sarokal) Aware) Agnostic) CPRI over Ethernet CPRI over Ethernet RoE RX Ethernet- RoE TX (Structure Agnostic) (Strucutre Agnostic CPRI tester CPRI tester (Structure TSN MAC TSN MAC (Structure based FH (Sarokal) (Sarokal) Agnostic) Agnostic) NGFI (Split 4) NGFI (Split 4) RF CPU baseband I RoE RX RoE TX (Spectrum RF L1 Offload processing (ROM (Native) (Native) Varying number Varying number Q Analyzer) pre-loaded) of LTE modulated of LTE modulated symbols symbols Control & Control & Management Management 7 www.comcores.com Confidential – Not to be Circulated

Lab setup  Xilinx VC709 FPGA demonstration platform  CPRI verification by Sarokal X-STEP tester  LTE demondulation verification by Keysight PXA spectrum analyzer 8 www.comcores.com Confidential – Not to be Circulated

CPRI over Ethernet - motivation  C-RAN  Bridge to carry current CPRI flows in future Ethernet based fronthaul networks 9 www.comcores.com Confidential – Not to be Circulated

CPRI over Ethernet - result  Synchronous traffic over asynchronous networks  Lossless transmission based on the clock recovery and delay control schemes 10 www.comcores.com Confidential – Not to be Circulated

Intra-PHY Split Proof of Concept BBU LTE Time R BBU LTE Data SFP+ TSN MAC RoE Tx A GEN ROM M 10G Ethernet FMCOMMS3 RRH F M R C Tx Data SFP+ TSN MAC RoE Rx A L1 DL Offload AD9361 FIFO interface Digital M Tx1 AD9361 RF interface Keysight PXA Spectrum ctrl Analyzer LTE Time AXI GPIO Ref clk AXI SPI eth_clk MicroBlaze 122.88 MHz I2C Keysight MXG Signal Generator SI5324 @156.25 MHz Source: ”White Paper of Next Generation Fronthaul Interface” 11 www.comcores.com Confidential – Not to be Circulated

PDSCH cell load  PDSCH cell load is dependent on the real traffic for Intra-PHY splits Downlink shared channel for user data 12 www.comcores.com Confidential – Not to be Circulated

Low load in a 10 MHz cell  Succesful cell synchronization  1 user allocated 1 RB (bottom)  Autodetection of cell configuration  Autodetection of user allocation 13 www.comcores.com Confidential – Not to be Circulated

Peak load in a 10 MHz cell  Full allocation of user data (PDSCH)  < 1 % EVM  ~160 Mbps load on Ethernet link  1:4 reduction compared to CPRI 14 www.comcores.com Confidential – Not to be Circulated

Acknowledgement 15 www.comcores.com