Japan. December 13, C-V2X Trial in Japan. Qualcomm Technologies Inc.

Transcription

1 December 13, 2018 Japan C-V2X Trial in Japan Qualcomm Technologies Inc.

2 Continental, Ericsson, Nissan, NTT DOCOMO, OKI, Qualcomm Technologies 2

3 Trial objectives The objective is to validate and demonstrate the benefits of C-V2X using direct communication technology defined by the 3rd Generation Partnership Project (3GPP) in their Release 14 specifications. The trials are designed to show the enhanced range, reliability and latency benefits of C-V2X direct communications operating in 5 GHz band. Additionally, the C-V2X Trials are designed to demonstrate the complementary benefits of network-based communications utilizing LTE-Advanced (LTE-A). The trial results will help develop the ecosystem by providing inputs to the relevant stakeholders, including ITS-related organizations and government agencies, as we prepare for the connected car of the future and the industry's evolutionary transition towards 5G New Radio (NR), the new global cellular standard being defined in 3GPP. Continental, Ericsson, Nissan, NTT DOCOMO, OKI, Qualcomm Technologies 3

4 C-V2X Trial System Architecture Visualization, Logging Server V2N application server Uu LTE Network Interface PC5 Direct communication Interface LTE core network Road Side Unit (RSU) V2N (Uu) V2I (PC5) V2P (PC5) V2V (PC5) V2P device C-V2X vehicle Continental, Ericsson, Nissan, NTT DOCOMO, OKI, Qualcomm Technologies 4

5 Trial System; Test vehicle, RSU, Pedestrian PC5 Antenna Test Vehicle Nissan LEAF Test Truck Test Vehicle Nissan LEAF Pedestrian RSU C-V2X trial system Test Vehicle Test Truck Pedestrian RSU Note Two Nissan LEAF test vehicles with PC5 and Uu trial system that are placed in the back trunk. Trial system consists of C-V2X DP for PC5, LTE V2N system for Uu, mobile router for cloud logging & remote operation, CAN converter and antenna and power battery. A full-size test truck with PC5 that is used for occlusion scenarios. PC5 antenna is placed on the roof. Pedestrian looks PC5 test device that is used for V2P scenarios. PC5 antenna is handled. RSU types PC5 test device that is used for V2I scenarios. PC5 directional antenna is placed at 5 m height. Continental, Ericsson, Nissan, NTT DOCOMO, OKI, Qualcomm Technologies 5

6 Trial System; PC5 radio configuration Item Specification On Board Unit(OBU) for PC5 Qualcomm C-V2X DP (Development Platform) MDM9150 Pre-commercial chipset Antenna (Nissan LEAF Test Vehicle) Antenna (RSU) Antenna (Truck) Antenna (Pedestrian) Max Tx power Frequency System bandwidth Tx bandwidth Modulation Error correction Tx interval Tx Packet size Resource Selection Window PC5: 2 Rx, 1 Tx, GNSS: 1 Rx Gain: 6 dbi, Omni Directional (v) Cable connector loss; 3.8 db Gain: 10 dbi, Directional antenna Directivity: ±20, Hight: 5 m Same antenna with LEAF mounted on the truck roof Same antenna with LEAF. Handheld Conducted 20.3 dbm (at OBU antenna port) EIRP: 22.5 dbm (OBU + antenna for test vehicle) PC5 synchronization GNSS only Continental, Ericsson, Nissan, NTT DOCOMO, OKI, Qualcomm Technologies GHz 10 MHz MHz (12 ~ 18 RBs) QPSK Turbo Coding and HARQ Every 100 ms bytes 20 ms

7 Trial System; V2N Car Status Car Status Database Server Application MQTT Broker USB Client Application Client PC V2N Application Server Server location:tokyo Driving Assistance Information NTT Docomo Commercial Network Smartphone GNSS CAN Item Radio Parameters Uplink message transmission interval Transport protocol Packet size Notes NTT Docomo commercial LTE network 100 ms MQTT (TCP/IP base) 116 Bytes Continental, Ericsson, Nissan, NTT DOCOMO, OKI, Qualcomm Technologies 7

8 Assumed test scenarios Japan C-V2X trial does not focus on the ITS use case verification, development at this moment. Below test scenarios which refer to DNPW, EEBL, IMA, HLW and VRUW of SAE J2945/1 are selected to establish V2V, V2N, V2P and V2I test scenarios. V2V, V2I, V2P, Direct communication Test scenario (Long range, short latency) Type V2N Network-based Test scenario (Advanced notification in wide area) Type Overtaking scenario for long range, short latency V2V Overtaking scenario V2N Vehicles Crossing scenario for long range in NLOS, short latency V2V Crossing scenario V2N Car Following scenario for short latency notification V2V Car Following scenario V2N Hazardous Location scenario for long range RSU coverage, short latency notification V2I Hazardous Location scenario V2N Pedestrian crossing scenario for long range in NLOS, short latency notification V2P Continental, Ericsson, Nissan, NTT DOCOMO, OKI, Qualcomm Technologies 8

9 Test Execution Summary Japan C-V2X trial were conducted in the JARI Tsukuba and Shirosato test track mainly. Shirosato oval track and straight track were used for high speed, longer range testing. Tsukuba LOS/NLOS test field was used for NLOS, LOS simulated testing. Tests were performed from July to October JARI Shirosato JARI Tsukuba Target scenario Overtaking scenario Test Venue JARI Shirosato Oval track Straight track Car Following scenario Hazardous Location scenario JARI Shirosato Oval track JARI Shirosato Straight track Oval track 500m LOS/NLOS test field 100m Crossing Scenario Pedestrian scenario JARI Tsukuba LOS/NLOS test field JARI Tsukuba LOS/NLOS test field, NTT DOCOMO YRP R&D center Continental, Ericsson, Nissan, NTT DOCOMO, OKI, Qualcomm Technologies 9

10 RSSI (dbm) Packet Error Rate (%) PC5 LOS Range; Test results At JARI Shirosato Oval Track HV is stationary RV in constant speed of 60 km/h Coverage distance is ~1200 m based on 10% PER* (PER was obtained from 50 samples over moving average) Over 1200 m distance is out of test scope due to NLOS condition in the oval track m Distance b/w vehicles (meters) Mean RSSI (5m bin) RSSI Packet Error Rate JARI Shirosato Oval Track *10 % PER was used as a criterion by referring other C-V2X trials. It does not come from application level requirements. Continental, Ericsson, Nissan, NTT DOCOMO, OKI, Qualcomm Technologies 10

11 RSSI (dbm) PC5 NLOS Range; Test results At JARI Tsukuba Track NLOS scenario was tested for comparison with LOS scenario Confirmed 380 m NLOS coverage distance Over 380 m distance is out of Tsukuba test track area No packet error was observed during both NLOS / LOS tests RSSI level delta between LOS / NLOS was average 14dB No packet error was observed in LOS/NLOS tests Containers for NLOS Truck(Stationary) for NLOS JARI Tsukuba Test Track HV (Stationary) 50m Distance (m) LOS, 40km/h NLOS, 40km/h LOS,40km/h,Mean(5m bin) NLOS,40km/h,Mean(5m bin) Continental, Ericsson, Nissan, NTT DOCOMO, OKI, Qualcomm Technologies 11

12 PC5 Range in high speed; Test results PER (%) At JARI Shirosato Oval Track HV and RV were driven in opposite direction around the track at 110 km/h resulting in a relative speed of 220 km/h Each vehicle on separate lane driving opposite direction Max distance with 10% PER is 1307 m Track s LOS distance is limited to ~1200 m Coverage distance is limited due to NLOS of the oval track and relative locations of each vehicle PER vs Distance at 220 km/h relative speed Oval track max LOS distance Distance (m) JARI Shirosato Oval Test track Continental, Ericsson, Nissan, NTT DOCOMO, OKI, Qualcomm Technologies 12

13 PC5 Latency; Test results At Shirosato Oval and Straight track Resource selection window is set to 20 ms Calculated average ITS application layer end-to-end latency in three use cases trials Tested in non-congested environment. Tx resources are randomly selected from 20 ms resource window Latency is measured between two test vehicles Median latency was less than 20 ms in all test scenarios. Test scenario Latency (ms) 5% tile 50% tile 95% tile Car Following Overtaking Hazardous location Combined all scenario Continental, Ericsson, Nissan, NTT DOCOMO, OKI, Qualcomm Technologies 13

14 LTE Downlink Signal Level Downlink signal level is measured by reference signal reception power (RSRP) RSRP: JARI Shirosato (Straight Track) JARI Shirosato (Oval Track) JARI Tsukuba (LOS/NLOS Test field) Continental, Ericsson, Nissan, NTT DOCOMO, OKI, Qualcomm Technologies 14

15 V2N Communication Latency JARI Shirosato (Straight Track) JARI Shirosato (Oval Track) JARI Tsukuba (LOS/NLOS Test field) Minimum 5%-tile 50%-tile 95%-tile 24 ms 30 ms 39 ms 49 ms 26 ms 31 ms 48 ms 52 ms 25 ms 33 ms 41 ms 53 ms Ping latency with 116 bytes payload. Vehicle network vehicle latency is measured No significant difference on end-to-end latency observed in driving courses Continental, Ericsson, Nissan, NTT DOCOMO, OKI, Qualcomm Technologies 15

16 RSRP vs end-to-end latency End-to-end Latency [ms] 100 JARI Shirosato (Oval Track) % % 5% RSRP [dbm] Additional latency observed in lower RSRP region which is due to additional retransmission on weak signal level Continental, Ericsson, Nissan, NTT DOCOMO, OKI, Qualcomm Technologies 16

17 Key findings and observations C-V2X PC5 direct communication basic performance 1200 m communication distances less than 10% PER in line-of-sight condition Confirmed communication in 220 km/h relative high-speed condition less than 10% PER and 1200 m distance Median latency are less than 20 ms between two test vehicles Communication range was 380 m under NLOS condition (14 db loss added by occlusion) Uu LTE network communications performance Wide area communication with end to end median latency of 50 ms in NTT DOCOMO s commercial network during connected state In 95%-tile, end-to-end latency was less than 60 ms Latency increase was observed in lower reference signal reception power (RSRP) condition. It is considered that radio layer retransmission (Hybrid ARQ) increased at that condition. Note: It is an observation based on trial instances, non-congested conditions of PC5 Continental, Ericsson, Nissan, NTT DOCOMO, OKI, Qualcomm Technologies 17

18 Glossary 3GPP 3rd Generation Partnership Project V2X Vehicle to Everything C-V2X Cellular Vehicle to Everything V2V Vehicle to Vehicle CAN Controller Area Network V2I Vehicle to Infrastructure DNPW Do Not Pass Warning V2P Vehicle to Pedestrian EEBL Electronic Emergency Brake Light V2N Vehicle to Network EIRP Effective (or Equivalent) Isotropic Radiated Power VRUW Vulnerable Road User Warning GNSS Global Navigation Satellite System HARQ Hybrid automatic repeat request HLW Hazardous Location Warning IMA Intersection Movement Assist ITS Intelligent Transportation System JARI Japan Automobile Research Institute LOS Line of Sight MQTT Message Queuing Telemetry Transport NLOS Non-Line of Sight OBU On Board Unit PER Packet Error Rate QPSK Quadrature Phase-Shift Keying RB Resource Block RSRP Reference Signal Reception Power RSSI Received Signal Strength Indicator Continental, Ericsson, Nissan, NTT DOCOMO, OKI, Qualcomm Technologies 18

19 Thank you Continental, Ericsson, Nissan, NTT DOCOMO, OKI, Qualcomm Continental, Ericsson, Nissan, NTT DOCOMO, OKI, Qualcomm Technologies 19

20 Thank you! Follow us on: For more information, visit us at: & Nothing in these materials is an offer to sell any of the components or devices referenced herein Qualcomm Technologies, Inc. and/or its affiliated companies. All Rights Reserved. Qualcomm is a trademark of Qualcomm Incorporated, registered in the United States and other countries. Other products and brand names may be trademarks or registered trademarks of their respective owners. References in this presentation to Qualcomm may mean Qualcomm Incorporated, Qualcomm Technologies, Inc., and/or other subsidiaries or business units within the Qualcomm corporate structure, as applicable. Qualcomm Incorporated includes Qualcomm s licensing business, QTL, and the vast majority of its patent portfolio. Qualcomm Technologies, Inc., a wholly-owned subsidiary of Qualcomm Incorporated, operates, along with its subsidiaries, substantially all of Qualcomm s engineering, research and development functions, and substantially all of its product and services businesses, including its semiconductor business, QCT.