Mobile networks for enhanced traffic safety. Anders Fagerholt Tylösand

Transcription

1 Mobile networks for enhanced traffic safety Anders Fagerholt Tylösand

2 Mobile networks for enhanced traffic safety Commercial in confidence Ericsson AB Page 2

3 Mobile networks for enhanced traffic safety Commercial in confidence Ericsson AB Page 3

4 the connected car Fees & Charges Vehicle interaction Road Usage Charging Pay-As-You-Drive -Insurance Remote Diagnostics and SW Updates Charging support for Electric Cars Congestion fees Service Calls Traffic Efficiency Infotainment Travel Planning Traffic Mgmt Traffic alerts In-car entertainment Personal Information Mgmt Eco Driving Traffic Safety Advertisement and Points Of Interest Traffic Hazard warnings ecall Intelligent Speed Adaptation Alco-lock Mobile networks for enhanced traffic safety Commercial in confidence Ericsson AB Page 4

5 Connected Vehicle Platform Interfaces - Devices Traffic efficiency Fees & charges Automotive Vehicle interaction Traffic safety Infotainment Goods mgmt Web interface (REST, SOAP, AJAX, JSON, ) 3rd party service integration Content Management Device/phone APIs (MeeGo, Android, iphone, ) Service Enablement Connectivity Secure com. Adaptive media delivery Push Broadcast Multicast Geocast Middleware and APIs Mobile networks for enhanced traffic safety Commercial in confidence Ericsson AB Page 5 OS (Android, MeeGo, ) hardware

6 3G HSPA 3G GSM & 3G Mobile networks for enhanced traffic safety Commercial in confidence Ericsson AB Page 6

7 e-call in Europe which way to go?

8 What is e-call? Triggered by a car crash or by pressing an alarm button. A voice call is set up and GPS-position + other data is sent. Mobile networks for enhanced traffic safety Commercial in confidence Ericsson AB Page 8

9 Private and public e-call Private ecall's are operational today Volvo OnCall, BMW Assist, PSA Apell d Urgance, Toyota G-book Alfa. Private call centers forward information to Public Safety Answering Points (PSAP). Other services are offered on top of ecall The EU Commission want to introduce a Pan-EU ecall Fully employed it would save 2000 lives per year and have an positive impact also on injuries. In all new car models from 2014 and all new cars from 2015? Mobile networks for enhanced traffic safety Commercial in confidence Ericsson AB Page 9

10 Present status Standardization and legal framework are prepared But not finished Pan-EU ecall and Third Party Solutions may coexist But the TPS-service must cover all EU Member States or have Pan- EU ecall as back-up. Mobile networks for enhanced traffic safety Commercial in confidence Ericsson AB Page 10

11 Mobile networks for enhanced traffic safety Commercial in confidence Ericsson AB Page 11 IA=Impact Analysis

12 Ericsson supports ecall! But Ericsson questions and doubts the EU ecall technical solution! Information about an accident shall be sent as audible pulses through the voice channel This "Inband" way for sending information was thought to be invisible and useable worldwide The Inband holds some (substantial) shortcomings and hassles in modern networks Mobile Network upgrades, maintenances and verification will be needed frequently The Inband imposes limitations on the evolution into All-IP networks The Inband imposes limitations to the evolution of ecall itself! In-Vehicle System (IVS) Public safety Answering Point (PSAP) Doing it like this is OK! Mobile networks for enhanced traffic safety Commercial in confidence Ericsson AB Page 12

13 ecall via Inband Modem - Critical Points In-Vehicle System (IVS) Position data GPS Receiver 4. Radio-Transmission errors, coverage, no retransmission 5. Processing: Acoustic Echo Suppression Level Adjustments MSD information source Microphone & Speakers IVS Data modem Speech Codec Radio Modem Radio Modem (BTS) PLMN Speech Transcoding (TRAU) Mobile Switching Center (MSC) 1. Unclear when to start 2. Interface: analogue or Bluetooth 3. Pre-Processing: Level-Control Noise Reduction Acoustic Echo Cancellation 6. Clock-Slip: can happen 7. Processing: Hybrid Echo Handling Level Adjustments MSD Display PSAP Data Modem PSTN/GSTN Microphone & Speakers Public-Safety Answering Point (PSAP) 9. Clock-drift between IVS and PSAP 10. Full-Duplex causes confusion with echo 8. In-Path-Equipment: e.g. compression,voip, not standardized, many different networks Mobile networks for enhanced traffic safety Commercial in confidence Ericsson AB Page 13

14 The In-Band Modem 140 octets of data (Minimum Set of Data), pulses sent over the voice channel in GSM PSAP = Public Safety Answering Point IVS = In Vehicle System Example here according to 3GPP Rel 9.1, no radio errors, some speech path delay: SSSSS NNN NAAAAA PSAP Transmission time for MSD0: about 1.3 sec! M S D1 The MSD-data IVS Elapsed time after trigger: about 5 sec! PPPPP Y M S D0 Voice channel blocked: about 12 sec! IVS triggers PUSH command IVS accepts PUSH, starts to send SYNC and MSD PSAP accepts PUSH, starts to send START PSAP received MSD0, CRC OK IVS sends a second version MSD1 PSAP sends many (unnecessary) copies of ACK signal Mobile networks for enhanced traffic safety Commercial in confidence Ericsson AB Page 14

15 ecall with In Band modem not smart connected! Expected field trial results Recording in real life 3G-3G network, best example, using = START PUSH SYNC MSD0 MSD1 Recording in real life 2G-2G network, frequent example, using = START PUSH SYNC MSD0 MSD1 MSD2 Note the substantial demolition of the signal due to unknown IPEs in the path. In both case IVS and PSAP were identical, so the differences come from the network. Every new call shows another picture. Often the Modem fails completely. Very often the PUSH is not heard by the PSAP. Mobile networks for enhanced traffic safety Commercial in confidence Ericsson AB Page 15

16 Ericsson is committed to An alternative concept for ecall is developed and tested by Ericsson: Voice is carried by a normal 112 emergency call Reuse SMS technology for data - Enhanced emergency SMS esms over the radio and SIPmessages in the networks esms reduces overall cost for cars, PSAP and network esms supports network evolutions into All-IP and Future Internet esms may be implemented without any real delay for ecall esms allows a flexible future evolution of ecall (text chat, encryption, Full Set of Data) New findings and alternative solutions needs to be considered! esms needs to be included in the EU Impact Analysis of ecall esms should be part of the ecall field trails in Europe starting 2011 Don't bet it all on one horse! Mobile networks for enhanced traffic safety Commercial in confidence Ericsson AB Page 16

17 VOICE IN Standard 112 and data in e-sms/sip for e-call 112 is the emergency number (911 in the US) emergency calls are re-routed in the Mobile Switching Center All other calls and SMS s Same principles and functions in GSM and 3G Voice in a standard 112 emergency voice call BSC MSC Data in a smart SMS over the air! (esms is sent over the signaling channel FACCH to 112 in less than 1.5 sec in both directions, fully handshaken) 112-re-routing Data in a SIP - IP message. Matching of number in the PSAP A Standard 112 emergency voice call PSAP Public Safety Answering Point Mobile networks for enhanced traffic safety Commercial in confidence Ericsson AB Page 17

18 ESMS IS THE Low cost, future proof e-call solution esms is independent of voice path No interruptions of the call No limitations on voice path evolution No dependency on Codec selection esms is simple to implement Uses standard building blocks minimum cost for all Minimal impact on the fixed and mobile Networks Decoupling of Networks and PSAP migration possible, once-and-for-all Network-upgrade esms is faster under all conditions esms has widest radio coverage esms is future proof Bi-directional data exchange between Car and PSAP Allows encryption Easy to expand service send more data Can be also be beneficial for TPS-eCall Mobile networks for enhanced traffic safety Commercial in confidence Ericsson AB Page 18

19 Road Hazard Warnings

20 ITS technology mapping Application Areas: Cellular vs. AD-Hoc Cellular communication Ad-hoc communication Traffic information Remote Navigation Cooperative traffic lights Lane change assistant Software download Hazard warnings Remote Diagnostics Intersection assistant Infotainment Collision avoidance 2G (GSM/EDGE) 3G (HSPA) 4G (LTE) IEEE p (ad-hoc) on 5.9 GHz Mobile networks for enhanced traffic safety Commercial in confidence Ericsson AB Page 20

21 COCAR A German research and demo project External Service Provider Cellular Communication System Traffic Management Center Mobile networks for enhanced traffic safety Commercial in confidence Ericsson AB Page 21

22 CAR2CAR road hazard warnings over cellular! Road Hazard Warning accident, emergency breaking, bad road condition, road works, slow vehicle! Geo-Messaging enabler RHW service center! Traffic Information updates traffic condition & warnings! Mobile networks for enhanced traffic safety Commercial in confidence Ericsson AB Page 22

23 Demonstrated scenarios Backend System Mobile networks for enhanced traffic safety Commercial in confidence Ericsson AB Page 23

24 CoCar Demonstration Live - May 2009 in Munich Mobile networks for enhanced traffic safety Commercial in confidence Ericsson AB Page 24

25 CoCar Architecture General Overview Mobile networks for enhanced traffic safety Commercial in confidence Ericsson AB Page 25

26 Capacity and performance Road traffic and telecom traffic simulation Highway crossing and existing telecom network layout 2000 cars in movement traffic jams and incidents Mobile networks for enhanced traffic safety Commercial in confidence Ericsson AB Page 26

27 Results Car to car delay less than 500ms Existing telecom network can provide the service when smart channels for up-link and down-link (broadcast) are used uplink downlink total Simulation of Frankfurt crossing, with 2000 equipped vehicles Mobile networks for enhanced traffic safety Commercial in confidence Ericsson AB Page 27

28 Highway drive test Alert Message Performance in UMTS Driving measurements in Vodafone 3G/HSPA network on 140 km Autobahn Speed between km/h Dedicated channel Shared channel CDF (%) Fast and resource efficient communication using shared channels possible Result: Vehicle-to-vehicle delay below 500 ms Delay (ms) Mobile networks for enhanced traffic safety Commercial in confidence Ericsson AB Page 28

29 Tokyo High way (Suidobashi Atsugi) Mobile networks for enhanced traffic safety Commercial in confidence Ericsson AB Page 29

30 2 Networks x 2 Channels C.D.F [%] 100% 90% 80% 70% 60% 50% 40% 30% 20% 10% 0% Delay [msec] Op-A DCH Op-A FACH Op-B DCH Op-B FACH Mobile networks for enhanced traffic safety Commercial in confidence Ericsson AB Page 30

31 The effect of cell hand-over Max Min Ave Drop 2356 msec 68 msec msec 1 times 1500 Delay [msec] 1000 Up Down Total :33 Suidobashi Sequence # Shutoko Tomei HW Mobile networks for enhanced traffic safety Commercial in confidence Ericsson AB Page 31 Atsugi 11:24 HonAtsugi

32 CoCAR IS EXTENDED NEW PARTNERS FOCUS on LTE LTE-based car communication Service Platform based on IMS Heterogeneous vehicle communication network (4G and p) Road traffic data management Proof-of-concept and verification Mobile networks for enhanced traffic safety Commercial in confidence Ericsson AB Page 32

33 LTE in automotive applications Better performance Lower latency Higher throughput Better scalability Lower cost Lower OPEX All-IP Simplified architecture and management Better coverage More flexible spectrum usage Drive tests planned as test networks become available Connection status Attached (optimal case) Attached (typical case) Idle Car-to-car delay LTE 30 ms < 100 ms < 500 ms HSPA 80 ms < 500 ms < 5 s Mobile networks for enhanced traffic safety Commercial in confidence Ericsson AB Page 33

34 Heterogeneous communication Architecture Mobile networks for enhanced traffic safety Commercial in confidence Ericsson AB Page 34

35 Heterogeneous communication Case 1: Warning messages Mobile Network CoCarX Backend Direct communication using pwlan broadcast (with routing through multiple hops) Communication through network infrastructure and backend System capacity sufficient for most typical scenarios Intelligent backend helps reducing duplicate downlink messages Traffic management centers in the loop In combination with p or standalone Mobile networks for enhanced traffic safety Commercial in confidence Ericsson AB Page 35

36 Common Goals The Federal Government s Broadband strategy Goal: Secure, high performance data access via broadband network for better user experience and fast car-to-car-communication. Goal: The Federal government intends to give a massive boost to the development of the broadband network in Germany. 8% of households without broadband internet connection Mobile network solution requires: Proper spectrum Powerful technology Mobile networks for enhanced traffic safety Commercial in confidence Ericsson AB Page 36 36

37 Digital Dividend Switch over to digital broadcast technology frees spectrum at 800 MHz ( digital dividend ) Network deployment started immediately after spectrum auction in summer 2010, commercial launch in Dec Advantages of this spectrum: very good electrical wave propagation and indoor coverage UMTS TV UKW 500 MHz 108 MHz UMTS Digital Dividend 800 MHz + GSM 900 MHz Light MHz UMTS MHz Propagation Penetration - LTE 800 LTE 800 LTE / HSDPA - Top speed (indoor) 37 Mobile networks for enhanced traffic safety Commercial in confidence Ericsson AB Page 37

38 Coverage Vodafone projections Germany UMTS/HSPA today Future LTE/HSPA Mobile networks for enhanced traffic safety Commercial in confidence Ericsson AB Page 38

39 LTE car-to-car delay Measurement setup Measurement Setup Routes Düsseldorf LTE 2.6 LTE 0.8 You are here Mobile networks for enhanced traffic safety Commercial in confidence Ericsson AB Page 39

40 LTE car-to-car delay Results (1) UMTS 2009 UMTS 2011 LTE 2011 Mobile networks for enhanced traffic safety Commercial in confidence Ericsson AB Page 40

41 LTE car-to-car delay Results (2) ~15ms Placing reflector in operator network brings small gain Mobile networks for enhanced traffic safety Commercial in confidence Ericsson AB Page 41

42 LTE Capacity evaluation Case 1: Warning messages Limiting: Downlink data channel capacity 1Hz average message rate per sender Distribution of messages to cars in same cell Comparison of average of 1, 10, 20, 40 cars per cell with hazard to report Stable results for 10 senders per cell Car-to-car delay < 200 ms even under load Linear scaling for other parameter sets Event notification messages handled well for typical scenarios Mobile networks for enhanced traffic safety Commercial in confidence Ericsson AB Page 42

43 LTE Capacity evaluation Case 2: Periodic messages Limiting: Downlink signaling channel capacity Downlink filtering: 10 or 40 cars in vicinity Message rate 2 Hz and 10 Hz compared Substantial system data and signaling load generated Lowering message rate and good downlink filtering required to manage load Cooperative awareness messages possible, but require significant adaptations Mobile networks for enhanced traffic safety Commercial in confidence Ericsson AB Page 43

44 Results Real-time integration and analysis of traffic data enabled Flexible framework for the real-time assessment of data quality values Architecture is efficient and flexible Well suited to evaluate and realize traffic applications Video: Queue End Detection Live Demo: Traffic State Estimation around Düsseldorf Mobile networks for enhanced traffic safety Commercial in confidence Ericsson AB Page 44 44

45 Impressions from the CoCarX Final Event Düsseldorf, May 25, 2011 Mobile networks for enhanced traffic safety Commercial in confidence Ericsson AB Page 45

46 3G/LTE and 5.9 GHz in Heterogeneous Communication Live demo intersection assistant Warning and automatic breaking in crossing BMW communicates with motorcycle via p 3G (HSPA) communication with CoCarX vehicle Mobile networks for enhanced traffic safety Commercial in confidence Ericsson AB Page 46

47 Conclusions Cellular networks will provide advanced ITS services! To make cost effective and future proof solutions you need deep insight in the networks features and functions! Smart phones and connected navigators already in all cars can receive ITS information a rapid uptake of services possible! < 500 ms Mobile networks for enhanced traffic safety Commercial in confidence Ericsson AB Page 47

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