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5GAA STUDY OF SPECTRUM NEEDS FOR SAFETY RELATED
INTELLIGENT TRANSPORTATION SYSTEMS
– DAY 1 AND ADVANCED USE CASES
By Reza Karimi (Huawei, UK), Markus Mueck (Intel, Germany),
Yan Li (Qualcomm, China), Stefano Sorrentino (Ericsson, Sweden)
5GAA has conducted a study in relation to the spectrum needs of use cases
1
for intelligent transport systems (ITS) and advanced driving as implemented
by cellular V2X (C-V2X) technologies.
Starting from a list of over 40 use cases, we first categorise these We further sub-classify the use cases which use direct
as “initial/day-1” or “advanced”. It is the view of the 5GAA that communications according to whether they employ continual
LTE-V2X and NR-V2X are the most suitable technologies for the (typically repetitive) messages or event triggered messages,
support of day-1 ITS and advanced driving use cases, respectively. respectively.
We subsequently classify these as
For each sub-class of use case, we then estimate the spectrum
• use cases which involve direct communications among road users needs for the relevant V2V, V2P, V2I, or V2N communications by
or between road users and ITS roadside infrastructure (so-called accounting for;
V2V, V2I, V2P) as supported by the C-V2X (PC5) interface in the
5.9 GHz band harmonised globally for ITS, and 1) road geometries, e.g., freeways and intersections,
2) the geographic density and speed of the road users,
• use cases which involve network-based communications between
road users and mobile network base stations (so-called V2N) as 3) the size, repetition rate, data rate, or latency of the required
supported by the C-V2X (Uu) interface in bands designated and messages for the support of the service, and
licensed for use by mobile communication networks,
4) the effective spectral efficiency of the relevant C-V2X radio
where the term “road user” includes vehicles and pedestrians. access technology.
Starting from a list of over 40 use cases, we first
categorise these as “initial/day-1” or “advanced”
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