Submission doc.: IEEE 11-13/1420r0 November 2013 Igal Kotzer, General MotorsSlide 1 HEW Considerations for the Vehicular Environment Date: 2013-11-11 Authors:

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Presentation transcript:

Submission doc.: IEEE 11-13/1420r0 November 2013 Igal Kotzer, General MotorsSlide 1 HEW Considerations for the Vehicular Environment Date: Authors:

Submission doc.: IEEE 11-13/1420r0 November 2013 Igal Kotzer, General MotorsSlide 2 Abstract WiFi is a widely available communication method In recent years WiFi is being incorporated in vehicles both as an AP for customer’s internet access purposes and as a data bearing method for the vehicle’s infotainment systems The use of WiFi in vehicles is constantly growing and the usage growth rate will increase as WiFi will gradually assume more roles in the vehicle’s communication portfolio The automotive environment is different in some aspect from the standard environment in which WiFi usually operates, hence these aspects must be addressed in parallel to WiFi’s increasing usage in vehicles

Submission doc.: IEEE 11-13/1420r0November 2013 Igal Kotzer, General MotorsSlide 3 Mobility Support Mobility support for HEW has been discussed in previous submissions [1] Vehicle to infrastructure and vehicle to vehicle communication are rapidly growing areas in the automotive world Mobility support can be divided into two cases: Low / medium mobility: speed < 50 km/h Some Examples: Dense urban city driving Vehicles heading towards each other with a speed of 20 km/h Vehicle to pedestrian communication High mobility: speed < 200 km/h Open road driving Vehicles heading towards each other with speed of 100 km/h

Submission doc.: IEEE 11-13/1420r0November 2013 Igal Kotzer, General MotorsSlide 4 Vehicle Channel Model In-car channel model: In-car communication has been presented as a use case This use case assumes [1]: Devices in a car are operating in close proximity (typical distances between STAs and AP are < 5m) Transmissions are mostly LOS. There might be interferences from the neighbor cars. We need to further assume the following environment restrictions affecting the communication: Large metal surfaces, metal can effect Variety of materials Frequency dependent reflection / penetration Emanating EM noise – especially from the engine compartment No line of sight with large attenuation

Submission doc.: IEEE 11-13/1420r0November 2013 Igal Kotzer, General MotorsSlide 5 Vehicle Channel Model Cntd. Car to car channel model: Mobility considerations Higher delay spread Higher Doppler Signal directivity Due to the metal can effect, the signal emanates from the car mostly through the windows

Submission doc.: IEEE 11-13/1420r0November 2013 Igal Kotzer, General MotorsSlide 6 Car to Car Communication Fast burst mode communication between moving cars Exchange data between moving cars when they are approximately parallel to each other Very fast link setup and authentication for short data packets Good SNR

Submission doc.: IEEE 11-13/1420r0November 2013 Igal Kotzer, General MotorsSlide 7 WiFi based Positioning and Ranging WiFi Geo-Location in Mall has been previously suggested [2] WiFi based positioning and ranging can also significantly increase positioning accuracy in urban canyons Ranging support (Time of Flight measurement) Mobile and urban environment

Submission doc.: IEEE 11-13/1420r0November 2013 Igal Kotzer, General MotorsSlide 8 References [1] IEEE 11-13/0534r1, “Direction and Use Cases for HEW”, HanGyu Cho (LG Electronics) [2] IEEE 11-13/0554r0, “Usage Models for HEW”, Minho Cheong (ETRI)