Light communication Use case: low latency audio in the cockpit May 2015 doc.: IEEE 802.11-15/0496r1 November 2017 Light communication Use case: low latency audio in the cockpit Date: 2017-11-02 Authors: Name Company Address Phone Email Simon Bazin FACTEM simon.bazin@factem.com Emilien Baur AIRBUS emilien.baur.external@airbus.com Valentin Kretzschmar valentin.kretzschmar@airbus.com Michel Malnoë michel.malnoe@factem.com Nikola Serafimovski pureLiFi nikola.serafimovski@purelifi.com Simon Bazin (FACTEM) Edward Au (Marvell Semiconductor)

Outline Context Origin of need Description of use case Conclusion November 2017 Outline Context Origin of need Description of use case Conclusion Simon Bazin (FACTEM)

Light communication in the cockpit: Context January 2016 doc.: IEEE 802.11-15/1472r0 November 2017 Light communication in the cockpit: Context Context: AIRBUS, FACTEM, XLIM part of a Cleansky 2 project : Aircraft Light Communication (ALC) Purpose: demonstrate LC capabilities, and in particular LC for audio headset Demonstrator in a flight simulator by December 2019 “This project has received funding from the Clean Sky 2 Joint Undertaking under the European Union’s Horizon 2020 research and innovation programme under grant agreement No 737645” Simon Bazin (FACTEM) Edward Au (Huawei Technologies)

Light communication in the cockpit: origin of need January 2016 doc.: IEEE 802.11-15/1472r0 November 2017 Light communication in the cockpit: origin of need AIRBUS wants to provide wireless headsets to aircraft crew Wireless = increased comfort, potential safety benefit Main motivations to choose LC against RF: Security: reduced risk of attacks or eavesdropping Safety: resilient to EM perturbations, guarantee of service Worldwide availability, free spectrum Cockpit Simon Bazin (FACTEM) Edward Au (Huawei Technologies)

Light communication in the cockpit: origin of need January 2016 doc.: IEEE 802.11-15/1472r0 November 2017 Light communication in the cockpit: origin of need Main constraints (cont’d): Fully operational whatever the ambient light conditions (incl. night flight) Up to 4 headsets at the same time Standardized solution wanted Coexistence with other applications: LC internet connection Simon Bazin (FACTEM) Edward Au (Huawei Technologies)

Light communication in the cockpit: Description of the use case January 2016 doc.: IEEE 802.11-15/1472r0 November 2017 Light communication in the cockpit: Description of the use case Bidirectional Audio communication LC Access point (one or several) inside cockpit and connected to Audio Server From one to four Terminals (Audio Headset + Microphone) 6 Simon Bazin (FACTEM) Edward Au (Huawei Technologies)

Light communication in the cockpit: Description of the use case January 2016 doc.: IEEE 802.11-15/1472r0 November 2017 Light communication in the cockpit: Description of the use case General Optical Near InfraRed on both links Downlink: 890 nm Uplink: 940 nm 1 (or several) Access Point Up to 4 Terminals Coverage Full cockpit coverage 7 Simon Bazin (FACTEM) Edward Au (Huawei Technologies)

Light communication in the cockpit: Description of the use case January 2016 doc.: IEEE 802.11-15/1472r0 November 2017 Light communication in the cockpit: Description of the use case Performance Multi-User: Up to 4 concurrent users Down link data rate: 2 Mbps Uplink data rate: 2 Mbps / user Latency < 3 ms - Challenging! PER < 10^(-4) (with the latency requirement in mind: no possibility to re-send lost packets) Full Duplex Communication 8 Simon Bazin (FACTEM) Edward Au (Huawei Technologies)

Light communication in the cockpit: Multi-Application Use Case January 2016 doc.: IEEE 802.11-15/1472r0 November 2017 Light communication in the cockpit: Multi-Application Use Case Quality of Service required to tackle different streams (Data, Audio) from different terminals within the same Access Point range Coexistence of different applications: Audio Headsets Tablets Simon Bazin (FACTEM) Edward Au (Huawei Technologies)

November 2017 Conclusion Proposal: consider implementing low latency communication in future 802.11 LC amendment: Data rates greater than 2 Mbps At least one PHY mode that would result in latency of less than 3 ms Enable full duplex PHY layer able work on two different frequencies Enable quality of service on the MAC packets Simon Bazin (FACTEM)