1. doc.: IEEE 802.11-11/0044r1 Submission Woong Cho, ETRI Jan 2011 Slide 1 Handover Technology for Vehicular Communications Date: 2011-01-18 Authors:

2. doc.: IEEE 802.11-11/0044r1 Submission Woong Cho, ETRI Jan 2011 Vehicular Communications V2V(Vehicle-to-Vehicle) applications: – Vehicle safety via vehicle multi-hop communications V2I(Vehicle-to-Infrastructure) applications: –ITS/Telematics via communications Basic requirements –Communication schemes: broadcasting, unicasting –Mobility: up to 200km/h –Long packet transmission:~2K bytes –Packet Latency: <100 msec –Networking: V2I, V2V Slide 2

3. doc.: IEEE 802.11-11/0044r1 Submission Woong Cho, ETRI Jan 2011 Standards for Vehicular Communications WAVE(Wireless Access in Vehicular Environments) –IEEE 802.11p PHY/MAC Layers Published in July 2010 –IEEE 1609.x 1609.1 : Remote management service 1609.2 : Security services for application and management messages 1609.3 : Networking services 1609.4 : Multi-channel operation 1609.11: Over-the-Air data exchange protocol for ITS 1609.3,4 & 11: Published in 2010 and 2011 The others: Will be published in 2011 Slide 3

4. doc.: IEEE 802.11-11/0044r1 Submission Woong Cho, ETRI Jan 2011 Handover Issues Vehicles are moving rapidly along roads − Handover occurs often, and handover issues become more important than 802.11 − When OBE enters new RSE, it takes long channel scanning time to carry out handover − Handover may have some specific schemes depending on the road structures 802.11p does not provide a sufficient answer for handover issue Fast handover scheme in vehicular environments − Supports continuous communication between RSEs − Provides various services Slide 4

5. doc.: IEEE 802.11-11/0044r1 Submission Woong Cho, ETRI Jan 2011 Slide 5 Communication Setup –IEEE 802.11p Data rate: QPSK Tx power: 15~20dBm EIRP –IEEE 1609.3 & 1609.4 Single PHY RSE & OBE : CCH/SCH alternative access (using PPS) Adjacent RSUs use common CCH & different SCH for same service ( 1 CCH & 2 SCHs) –L2 Handover by SCH Assignment ( based on RSSI) Provided Services –V2I: Internet streaming & CCTV (use fixed IP address) –V2V: Safety messages Implementation of Handover

6. doc.: IEEE 802.11-11/0044r1 Submission Woong Cho, ETRI Jan 2011 Slide 6 Communication Environments/ Application Scenarios  Busan-Ulsan Express way  Jangan IC ~ Onyang IC (total length 11.0km)  RSE : 5EA, Avg. Distance between RSEs. 1.04 km  Speed  60km/h(forward)  100 km/h(reverse)  ITS WC 2010 (SMART HIGHWAY project)  Busan-Ulsan Express way  Jangan IC ~ Onyang IC (total length 11.0km)  RSE : 5EA, Avg. Distance between RSEs. 1.04 km  Speed  60km/h(forward)  100 km/h(reverse)  ITS WC 2010 (SMART HIGHWAY project) RSE #1RSE #2RSE #3RSE #4RSE #5

7. doc.: IEEE 802.11-11/0044r1 Submission Woong Cho, ETRI Jan 2011 Slide 7 RSE0 (CCH:f0, SCH:f1) RSE1 (CCH:f0, SCH:f2) RSE2 (CCH:f0, SCH:f1) RSE0,SVC1, f1 RSE1,SVC1, f2 RSE2,SVC1, f1 SCH:f1SCH:f2 SCH:f1 WAVE Service Server Communication Architecture

8. doc.: IEEE 802.11-11/0044r1 Submission Woong Cho, ETRI Jan 2011 Slide 8 RSSI Measurements –Vehicle speed: 60km/h –Changing of RSSI color: Handover occurs

9. doc.: IEEE 802.11-11/0044r1 Submission Woong Cho, ETRI Jan 2011 Next Step in Vehicular Communications Consider –Service needs Provide various services including multimedia service Continuous CCTV, Web browsing –Fast & Seamless handover scheme with 802.11p –Support L3 handover Provide lossless packet forwarding mechanism –Support vertical handover Support continuous communications with various media (cellular, WiBro(WiMax), WAVE and Etc.) Slide 9

10. doc.: IEEE 802.11-11/0044r1 Submission Woong Cho, ETRI Jan 2011 Straw Poll Yes : 12 No : 1 Abstain : 13 Slide 10 Q. Should IEEE 802.11 WNG receive further presentations on the topic of handover technology for vehicular communications?