Multi-Channel Operation for V2X Communication
Explore the implementation aspects of Multi-Channel Operation (MCO) in V2X communication, discussing the need for MCO in upcoming V2X use-cases like platooning and cooperative perception. Delve into Adjacent Channel Rejection (ACR) and its impact on MCO, examining scenarios with both single and dual receivers. Gain insights into the challenges and considerations related to MCO in urban environments based on specified assumptions.
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November 2018 doc.: IEEE 802.11-17/xxxxr0 Aspects of multi-channel operation for NGV Date: 2018-MM-DD Authors: Name Ron Toledano Affiliations Autotalks Address Grand Netter bldg., Kfar Netter, Isael Grand Netter bldg., Kfar Netter, Isael Phone +972-9-886-5300 email Ron.toledano@auto-talks.com Onn.haran@auto-talks.com Onn Haran Autotalks +972-9-886-5300 Submission Slide 1 Ron Toledano, Autotalks
November 2018 doc.: IEEE 802.11-17/xxxxr0 Abstract Existing DSRC deployments are using single channel Some of the devices in market already support multi-channel capability Upcoming V2X use-cases, such as platooning, and later cooperative perception, require multi-channel operation (MCO) Limited spectrum doesn t enable to spread channels In this presentation we discuss implementation aspects related to MCO Submission Slide 2 Ron Toledano, Autotalks
November 2018 doc.: IEEE 802.11-17/xxxxr0 Adjacent Channel Rejection (ACR) Assumptions ACR defines tolerable interference-to-signal power difference under target receiver performance (sensitivity) Increased ACR allows receiver to experience stronger interference on adjacent channel while maintaining target receiver performance at its dedicated channel Limits of MCO with simultaneous RX from separate V2X channels (adjacent or non-adjacent) are defined by ACR Submission Slide 3 Ron Toledano, Autotalks
November 2018 doc.: IEEE 802.11-17/xxxxr0 ACR and MCO Single Receiver RX1 has single receiver tuned to channel A (e.g. safety channel) TX1 and TX2 transmit on channels A and B respectively RX1 is at sensitivity range from TX1. Due to interference from channel B it does not detect TX1 Assuming current ACR requirements: What is the lowest inter-vehicle distance (d2) that will allow RX1 to detect channel A at sensitivity range? channel B TX2 channel A TX1 RX1 Submission Slide 4 Ron Toledano, Autotalks
November 2018 doc.: IEEE 802.11-17/xxxxr0 ACR and MCO Dual Receiver RX1 has dual receiver tuned to channels A and B TX1 and TX2 transmit on channels A and B respectively What are (d1,d2) combinations that will allow RX1 to detect both channels A and B? channel B TX2 channel A TX1 RX1 Submission Slide 5 Ron Toledano, Autotalks
November 2018 doc.: IEEE 802.11-17/xxxxr0 Assumptions Urban environment: WINNER II path-loss model for LOS [1] MCS2 (QPSK R=1/2) Target SNR = 6dB ACR=25 dB and co-adjacent = 39 dB (enhanced sensitivity) Receiver Noise figure: 9 dB Mask C Submission Slide 6 Ron Toledano, Autotalks
November 2018 doc.: IEEE 802.11-17/xxxxr0 Results Single Receiver Distance between channel A vehicles is d1 (sensitivity range) Varying distance (d2) for channel B vehicle Submission Slide 7 Ron Toledano, Autotalks
November 2018 doc.: IEEE 802.11-17/xxxxr0 Results Dual Receiver Varying distances (d1,d2) for channel A and channel B vehicles Submission Slide 8 Ron Toledano, Autotalks
November 2018 doc.: IEEE 802.11-17/xxxxr0 Observations Adjacent channel transmission creates interferences to main channel within ~50 meters range Motivates modification of ACR and mask requirements Main channel DCC would further increase interferences impact Careful TX power balance should be applied for all channels A vehicle transmitting in an adjacent channel is deaf to main channel Multi-channel operation would require coordination mechanisms Submission Slide 9 Ron Toledano, Autotalks
November 2018 doc.: IEEE 802.11-17/xxxxr0 Appendix [1] WINNER II Channel Models, D1.1.2 V1.2. Submission Slide 10 Ron Toledano, Autotalks
