Proposal for New 802.11bd 20MHz Mode for Enhanced ITS Interoperability
The document discusses the necessity of a new 802.11bd 20MHz mode for improved interoperability within Intelligent Transportation Systems (ITS) due to limitations with current Wi-Fi channels and the scope of 256-QAM modulation. It presents proposals approved by the Car-2-Car Communications Consortium to address these issues, aiming to enhance connectivity and efficiency in automotive communication technologies.
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July 2020 doc.: IEEE 802.11-20/xxxxr0 On 802.11bd Mandatory Features: Input from the Car-2-Car Communications Consortium Date: 2020-06-07 Authors: Name Affiliations Address 21, Route de Luxembourg 6633 Wasserbillig Luxembourg 465 Bernardo Avenue Mountain View, CA 94043 Phone email Friedbert Berens FBConsulting Sarl +4916097971846 friedbert.berens@me.com John Kenney Toyota InfoTech Labs +1 650-694-4160 jkenney@us.toyota-itc.com Ioannis Sarris u-blox Athens, Greece +30 6976080735 ioannis.sarris@u-blox.com Submission Slide 1
July 2020 doc.: IEEE 802.11-20/xxxxr0 Background: The European CAR 2 CAR Communication Consortium is an industrial-driven, non-commercial association founded by European vehicle manufacturers https://www.car-2-car.org/ Submission Slide 2
July 2020 doc.: IEEE 802.11-20/xxxxr0 Background, Car-2-Car members: Partners 32 associate members 29 development members GM Honda Hyundai KTM MAN Groupe Renault Toyota Volkswagen Volvo Yamaha Aptiv Autotalks Bosch Cohda Wireless Continental Denso Infineon NXP LG u-blox Siemens Valeo DLR Eurecom Fraunhofer IMST KTH TNO Submission Slide 3
July 2020 doc.: IEEE 802.11-20/xxxxr0 Discussion Interoperability with Wi-Fi The current NPRM proposal by the FCC allocates the lower 45 MHz of the 5.9 GHz band for Wi-Fi operation (802.11a/n/ac/ax/be) Operation of 802.11bd (either 10 MHz or 20 MHz) will not be an attractive solution for the 45 MHz as non-interoperable with Wi-Fi A single 10 MHz channel for 802.11p/bd in the upper 30 MHz of the 5.9GHz band will not fulfill the needs of ITS It is unlikely that automotive OEMs will deploy 802.11p/bd based systems if only 10 MHz of bandwidth is accessible to ITS Could 802.11a/ac/ax be used or do we need a new 802.11bd 20 MHz mode? Submission Slide 4
July 2020 doc.: IEEE 802.11-20/xxxxr0 Discussion 256 QAM modulation This mode can be important for enabling high throughput, matching the specification of competitive solutions The scope of 256-QAM however is limited to a few applications and not for a broad deployment (similarly to 2x2 MIMO) Implementation and verification of this feature adds cost and complexity 802.11p only defines MCS 0, 2 and 4 as mandatory, yet there were no limitations due to this (vast majority of applications exclusively use QPSK) NR-V2X (Rel. 16) also defines 256-QAM as an optional mode Submission Slide 5
July 2020 doc.: IEEE 802.11-20/xxxxr0 Proposal Based on this discussion, the authors are making the following proposals. These were discussed during the C2C Week #10 meeting and were approved by the C2C Steering Committee 1. The definition of an additional 20 MHz mode which will be interoperable with Wi-Fi (802.11a/n/ac/ax/be) 2. The classification of 256-QAM modulation as an optional feature for 802.11bd Submission Slide 6
July 2020 doc.: IEEE 802.11-20/xxxxr0 Straw poll 1 Do you support the definition of an additional 20 MHz mode which will be interoperable with Wi-Fi (802.11a/n/ac/ax/be)? Y / N / A Submission Slide 7
July 2020 doc.: IEEE 802.11-20/xxxxr0 Straw poll 2 Do you support the classification of 256-QAM modulation as an optional feature for 802.11bd? Y / N / A Submission Slide 8
