Ultra-Low Latency Ethernet Ethernet Everywhere Network Technology Lab of 2012 Labs www.huawei.com James.huang@huawei.com HUAWEI TECHNOLOGIES CO., LTD.
What is Required for 5G X-Haul Network? Integra rated Fronthaul / Backhaul Unified data plane for both Fronthaul BBU pool ol and Backhaul; eCPRI RI S1 S1 RRU RRU Ultra low latency and CPRI / eCPRI EPC EPC RRU RRU Ethernet t based X-Hau Haul netwo twork S1 S1 support; Leverage the Ethernet mature eNod odeB eB ecosystem eCPRI: Next vers rsion CPRI based on Ethern rnet, see http://www.cpri ri.info/pre ress.html Network rk Slicing BBU U pool Fronth thaul slice Hard isolation to get guaranteed QoS Smart Phones EPC for Smart Backhaul Slice1 for Smart t phone Phone Ultra low latency Vehicles High bandwidth utilization Backhaul Slice2 for V2V EPC for V2V IoTs Backha haul ul Slice3 e3 for IoT EPC for IoT Ethernet t based X-Hau Haul netwo twork Page 2 HUAWEI TECHNOLOGIES CO., LTD.
Latency in Common Network Devices Application 7 OSI layer NE NE latency Presentation Data 6 Session L0 Optical equipment (ROADM, ~ns 5 Mux/Demux, Filter, Coupler) TCP windowing Flow control L0 EDFA Optical Amplifier ~100ns 4 Segments Packet re-send L0 Fiber(including DCF) 5us/km Better Isolation Effect Address lookup OTN node (Mapper/Memapper, 10us~100us Packet forwarding L1 3 Less Latency Packets Load-independent FEC, Switch) Routing L1 SDH node ( Mapper/Demapper, ~100us Load-independent Switch) Store-Forward Line coding 2 Frames L2 L2 Switch ms~10ms Switching Load-dependent Framing L3 Router, L3 Switch ms~10ms FEC Load-dependent 1 Bits Latency Analysis of Network Equipment Network processing latency and isolation effect in OSI model Source: Chine Telecom “Low latency Optical Network Technology White Paper” http://www.ctbri.com.cn/news/content.jsp?Id=100&Flag=-1 Page 3 HUAWEI TECHNOLOGIES CO., LTD.
How to Achieve Low Latency in Ethernet? IP / MPLS Routing IP / MPLS L7 Application L6 Presentation IP / MPLS L3 MAC Switching MAC Session L5 MAC L2 L4 Transport Ethernet RS L3 X-Ethernet Network PCS PCS X-Et Ethern rnet Relay PCS L2 Data Link PMA Physical PMD L1 Physical Physical L0 Medium Medium Medium Medium Ethernet PCS laye yer relay is implemented to get less ss latency cy. This s method is based on Native Ethernet. We call it “ X-Ethernet ” . Page 4 HUAWEI TECHNOLOGIES CO., LTD.
X-Ethernet Feature: Ultra-Low Latency IP Routing Packet IP IP IP IP Ethernet MAC eCPRI … CPRI Ethernet Frame MAC MAC Switch ching 64/6 /66b Code Block 64/6 /66b Code Block X-Ethernet PCS / PHY PCS / PHY Relay X-Et Ethern rnet Bit stream 0 1 0 1 0 1 0 1 PHY HY PHY HY Media Media Base sed on 64B/66B block ck stream Eliminate table looku kup and buffer queuing Direct support to various s types s of traffic, c, such ch as Ethernet MAC, CPRI, eCPRI Page 5 HUAWEI TECHNOLOGIES CO., LTD.
X-Ethernet Feature: E2E Hard Pipe End End X-E X-E Station Node Node Station L2 / L3 L2 / L3 L2 / L3 forwarding L2 / L3 forwarding X-E X-E PCS PCS PCS PCS Relay Relay PHY PHY PHY PHY PHY PHY Media Media Media End Station X-E Node X-E Node End Station Build E2E pipe through X-E Relay Provi vide support to SDN control Page 6 HUAWEI TECHNOLOGIES CO., LTD.
X-Ethernet Feature: Hybrid Multiplexing Foreground Traffic Foreground Traffic Hard Pipe 1 Hard Pipe 1 Network Network Foreground Traffic Foreground Traffic Hard Pipe 2 Node Node Hard Pipe 2 Background Background Traffic Traffic Traditional Hard Pipe (no sharing) Foreground Traffic Foreground Traffic Hard Pipe 1 Hard Pipe 1 X-Ethernet X-Ethernet Foreground Traffic Foreground Traffic Hard Pipe 2 Node Node Hard Pipe 2 Background Background Traffic Traffic X- Ethernet’s Hard Pipe (Hybrid Multiplexing) Unique multiplexing scheme to improve network resource usage Page 7 HUAWEI TECHNOLOGIES CO., LTD.
Possible X-Ethernet Device Architecture PCS Layer NP + TM NP + TM Idle insert Idle insert /delete /delete MAC MAC MAC MAC Ethernet PCS Relay PHY PHY PCS PCS PCS PCS Ethernet PCS layer relay capability integrated in packet device, e.g. a router Latency sensitive data stream forwarded through PCS layer relay Common data stream go through NP and TM for L2/L3 processing Page 8 HUAWEI TECHNOLOGIES CO., LTD.
X-Ethernet PoC CPRI Ethernet Two 10G ports s (SFP+) and six 100G ports s (CFP2) 10G ports s support 10GE or 9.8G CPRI and 100G ports support X-Ethernet or Native ve 100GE PoC with FPGA runn nning ng at 156M 6MHz, z, switch ching latency cy is about 300ns; s; Page 9 HUAWEI TECHNOLOGIES CO., LTD.
X-Ethernet PoC • Test in the lab is finished. • Next to consider interworking with RRU/BBU, network slicing, etc. Page 10 HUAWEI TECHNOLOGIES CO., LTD.
Ta Target of the e Work Research rch project ct Looki king for research rch collabora rations Page 11 HUAWEI TECHNOLOGIES CO., LTD.
Recommend
More recommend
