Topic | DSRC 802.11p | C-V2X Rel. 14/15 |
---|---|---|
Origin | WiFi | LTE uplink |
Roadmap | 802.11: targets interoperability with 802.11p | C-V2X Rel. 16 based on NR(5G). Operates in a different channel than Rel. 14/15 |
Deployment | Since 2017. Mass market in 2019 | Initial deployment in 2021 |
Cellular Connectivity | Self managed | Cellular operators can optionally apply theoretical real-time control for higher network utilization |
Modulation | OFDM | SC-FDM |
Concurrent Transmissions | No | Yes |
Line Coding | Convolution code | Turbo code |
Transmission Scheduling | CSMA | Semi-persistent sensing of least occupied resource |
Time Synchronization | Loose Asynchronous | Very tight Synchronous requirements |