Kavli Affiliate: T. Higuchi
| First 5 Authors: B. Coll-Perales, M. C. Lucas-Estañ, T. Shimizu, J. Gozalvez, T. Higuchi
| Summary:
5G networks provide higher flexibility and improved performance compared to
previous cellular technologies. This has raised expectations on the possibility
to support advanced V2X services using the cellular network via
Vehicle-to-Network (V2N) and V2N2V connections. Most existing studies focus on
evaluating the performance and feasibility of the 5G radio access network to
support advanced V2X services. The network deployment and dimensioning also
have a strong impact on the end-to-end (E2E) performance, and hence on the
suitability of V2N and V2N2V connections to support advanced V2X services. This
is specially the case for the E2E latency that is a critical requirement of V2X
services. This paper introduces a novel E2E latency model for 5G V2N/V2N2V
communications. The model includes the latency introduced at the radio,
transport, core, Internet, peering points and application server (AS) for
single mobile network operator (MNO) and multi-MNO scenarios. This paper
estimates the E2E latency for a large variety of possible 5G network
deployments that are being discussed or envisioned to support V2X services.
This includes the possibility to deploy the V2X AS from the edge of the network
to the cloud. The model is utilized to analyze the impact of different 5G
network deployments and configurations on the E2E latency. The analysis helps
identify which 5G network deployments and configurations are more suitable to
meet V2X latency requirements. The conducted analysis highlights the challenge
for centralized network deployments that locate the V2X AS at the cloud to meet
the latency requirements of advanced V2X services. Locating the V2X AS closer
to the cell edge reduces the latency, but requires a higher number of ASs and
also careful dimensioning of the network and its configuration to ensure
sufficient network and V2X AS resources are dedicated to serve the V2X traffic.
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