Connected Vehicle

Cellular V2X outperforms DSRC in comprehensive tests by 5GAA

The test results show that Cellular Vehicle-to-everything (C-V2X) direct communications technology, consistently outperforms 802.11p/DSRC.

As the industry moves towards 5G and regulators worldwide are looking into future rules for connected cars technologies, the 5G Automotive Association has conducted tests to compare the performance of 802.11p/DSRC (known in Europe as ITS-G5) and Cellular V2X PC5 radio technologies in delivering V2V (Vehicle-To-Vehicle) safety messages.

The test results show that Cellular Vehicle-to-everything (C-V2X) direct communications technology, consistently outperforms 802.11p/DSRC. With a natural evolution path towards the low latency and high bandwidth benefits of 5G NR, C-V2X also demonstrated superior performance in several dimensions, including the following:

• Enhanced reliability over extended communications range;
• Better non-line-of-sight performance; and
• Greater resiliency to interference (e.g. arising from other devices)

These performance advantages are particularly important in the most difficult environments such as non-line-of-sight scenarios (e.g., around a corner, highway queue forming etc.), where resident onboard sensors and radars have certain limitations.

Reliable and timely radio performance is a crucial requirement that all those with a stake in transport safety depend on to deliver critical safety applications. Such test procedures are a prerequisite to comparing the available radio technologies, and the results are very clear: C-V2X direct communications (PC5) performs better.

The V2V radio performance tests were conducted by 5GAA members over a period spanning six months from March through September 2018.
C-V2X combines on a single technology platform a direct short-range mode operating over ITS spectrum (not requiring any network coverage or subscription) and a long-range mode using traditional cellular networks operating over the mobile network operator licensed spectrum.

The above-mentioned tests were conducted using only the C-V2X direct short-range communication mode without any network involvement.
C-V2X current realization is based on LTE-V2X and will evolve into 5G-V2X (also called 5G New Radio or “5G NR”) to deliver additional capabilities and support new services

C-V2X is commercially available and reuses the decades’ long investment into protocols and upper layer applications to improve safety, deliver traffic efficiency, and support automated driving.

The design and execution of each experiment were set up to ensure that environmental conditions, radio frequency parameters, system integration details, and physical structures were consistent when comparing 802.11p/DSRC and C-V2X direct communications.

As yet another strong signal about the global momentum behind C-V2X, 5GAA today counts 102 members (40% from Europe, 35% Asia-Pacific and 25% Americas), an increase of 60% since January 2018, quite a movement for a 2-year-old organization.

5GAA brings together the automotive and ICT industry leaders from all world regions among which carmakers, Tier-1 suppliers, mobile network operators, chipset manufacturers, test equipment vendors, telecom suppliers, and traffic signal suppliers in order to continue C-V2X field tests and to accelerate in-vehicle and infrastructure commercial deployments, foreseen beginning in 2019 globally.

Source: Press Release


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