Overview of OAI Work in BUPT
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1 1 4 th OAI Workshop Overview of OAI Work in BUPT Luhan Wang Beijing Univ. of Posts & Telec. Paris, Nov. 8, 2017
2 Introduction of BUPT group 项目内容概况 BUPT Beijing University of Posts and Telecommunications Like Télécom ParisTech in France, but a bit bigger Faculty: 2100+, Professors: 959, Students: BUPT Tian anmen Square Beijing Key Lab of Network System Architecture and Convergence Focus on: RAN architecture and technologies Core and Bearer Network Architecture and Technologies Wireless Enabled Vertical Services
3 Introduction of BUPT group 3 Joint BUPT-Eurecom Open5G Lab 1.1 项目内容概况 2016-Dec,,Eurecom and BUPT decided to make joint efforts to build and operate a joint Open 5G Lab. Mission of Open5G Lab Research and Develop on OAI, and evolution to Open Source 5G Build Testbed for OpenAirInterface Disseminating OpenAirInterface (Mainly in China area) The 3rd OAI workshop was held jointly by BUPT and Eurecom in Beijing, April 开源 5G
4 BUPT Works around OAI 4 SDN enabled LTE WiFi convergence, implemented with OAI and SWAN network, Non-Othogonal Multiple Access based on OAI, cooperated with ChinaTelecom, C-RAN System based on OpenAirInterface, up to now Research and Develop of 5GS Service-based Architecture, up to now LTE CASE and Outdoor testbed for OpenAirInterface, up to now OAI enabled remoting driving, a proof of concept for Internet of Vehicles, up to now Archived
5 OAI based NOMA 5 LTE R14 MUST WI is based on NOMA. 5G NR will also introduce NOMA, and NR NOMA SI has been started from March In OAI based NOMA, 2 UE s signals are modulated onto same resource block, SIC receiver is used in near UE. NOMA show a 40% gain over traditional orthogonal multiple access technologies. Power UE2 USRP GPP enb UE1 Tx siganl d 1 d 2 freq d 1 < d 2 Power Power USRP GPP UE1 UE2 UE1 freq UE2 UE1 freq USRP GPP UE2 UE1 Rx siganl UE2 Rx siganl SIC of UE2 signal UE1 signal decoding UE2 signal decoding UE1 Rx procedure UE2 Rx procedure
6 LTE CASE and Testbed for OAI 6 OAI is deployed in indoor and outdoor environment, Aims to: Test the stability of OAI Test the performance of OAI Test the compatibility of new SDR on OAI Provide a demo for new users in China USRP Antenna LN-PA PA Duplexer BUPT BUPT build-3 Indoor deployment 174m Outdoor enb 315m enb-02 AP04 enb-03 AP05 enb-01 CN AP01 AP02 AP03 BUPT Outdoor deployment
7 LTE CASE Insdie LTE CASE Outside LTE CASE and Outdoor testbed for OAI 7 LTE CASE is a portable LTE enb equipment, and can provide long range coverage, includes: 1 enb PC 1 Downlink power amplifier 1 Uplink low noise power amplifier 2 Filters (uplink and downlink) 1 Power socket array LTE CASE Power Socket USRP enb PC DL Filter UL LN-PA UL Filter DL PA Duplexer Power Ethernet Antenna LTE CASE architecture
8 LTE CASE and Outdoor testbed for OAI 8 Outdoor Test Settings: Power amplifier: 45 db for band7, low noise power amplifier: 20dB for band7. Antenna: Directive Antenna: 15dBi, 60, from 1700MHz to 2700MHz Omnidirectional Antenna: 12dBi, from 1700MHz to 2700MHz Transmission Mode: TM1 TM2 Outdoor Test Scenarios: TM1+Directive Antenna TM1+Omnidirectional Antenna TM2+Directive Antenna TM2+Omnidirectional Antenna Measurement tools: SpeedTest iperf
9 LTE CASE and Outdoor testbed for OAI 9 Test Results: Under current settings, the coverage range is about 300 meters TM2 with directional antenna performs a bit better than other combinations when considering throughput Uplink throught drops fast than downlink, may because of the uplink low noise power amplifier. Throughput drops fast when moving (< 20KM/h), may because of channel estimation algorithm?
10 OAI Enabled Remote driving 10 V2X (Vehicle to everything) will be a very important scenario in 5G, like unmanned driving. In this research, we built a remote driving prototype. To give an example that OAI can facilitate the research in 5G vertical industrials. What s remote driving? Video signal Connected to cellular network Control signal Remote cockpit Unmanned Vehicle
11 OAI Enabled Remote driving 11 To support remote driving, there re two 5G scenarios involved: urllc for the control signal embb for the video signal In outdoor coverage: 1. For control signal, including 1 enb and 1 EPC. PLMN set to , 5MHz bandwidth, DL: 2630MHz~2635MHz, UL: 2510MHz~2515MHz 2. For video signal, including 2 enbs and 1 EPC. PLMN set to , and MHz bandwidth for each enb, DL: 2620MHz~2630, 2660MHz~2670MHz, UL: 2500MHz~2510MHz, 2540MHz~2550MHz Outdoor Coverage For Control LTE CASE LTE CASE LTE CASE For Video 3 U Remote Cockpit Video Server Front-view Video back-view Video In Remote Cockpit: 1. Two monitors, are used to monitor the front and back view from car. 2. Logitech Game Wheel is used to generate control signal, and transferred through Drive Controller. EPC Server EPC EPC EPC Drive Controller Drive Suit
12 OAI Enabled Remote driving 12 In-car settings: 1. A signal repeater with one outdoor antenna and one indoor antenna. Gain: 30dB Back-view Camera Front-view Camera 2. DTU, transfer LTE to Ethernet; connect to operation agent, front-view camera, backview camera, respectively. 3. Front-view camera, back-view camera; Resolution: 1280x720P, FPS: 25, Bit rate: 12Mbps DTU DTU Signal Repeater Ethernet Cable Ethernet Cable Operation Agent 4. Operation Agent: receive control signal from remote controller, and drive the car In-car settings
13 OAI Enabled Remote driving 13 Video from car Drive Suite LTE CASE
14 OAI Enabled Remote driving 14 Our Costumed Electric Car DTU and Operation Agent Camera and Differential Positioning receiver
15 OAI Enabled Remote driving 15
16 16 4 th OAI Workshop Thank you! wluhan@bupt.edu.cn
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