LTE-V2X performance evaluation for cooperative collision avoidance (CoCA) systems

Abstract

The interest for communications between vehicles and the infrastructure or other vehicles (V2X) has recently increased towards connected vehicle applications, and particularly cooperative collision avoidance (CoCA). In this paper, we evaluate the performance of LTE-V2X networks in the context of Intelligent Transportation Systems for traffic collision avoidance applications based on sharing occupancy maps between the infrastructure and the vehicles. We compare by simulation different LTE-V2X configurations under realistic conditions in an intersection scenario. Then, we evaluate every type of communication link (V2I and V2V) as a function of the density of vehicles. The results show the potential of the concept for V2X and the trade-offs in terms of reliability, capacity and latency.

Impact of LTE-V2X Connectivity on Global Occupancy Maps in a Cooperative Collision Avoidance (CoCA) System

“…This module simulates LTE-V2X connectivity in NS-3 with a cross-layer simulation approach [8] between the physical and higher layers to exploit SUMO mobility traces. LTE-V2X operates using the Single Carrier Frequency Division Multiplexing Access (SC-FDMA) waveform.…”

“…In this module, we consider a 10 MHz bandwidth divided in 50 RBs using the ITS 5.9 GHz band with a power transmission P T x = 23 dBm. For the propagation model, we consider the path loss model Winner B1 (in Line of Sight (LoS), Non LOS and Obstructed LoS condition [8]) and the fast fading model based on the 3GPP Extended Vehicular A Model (See [11]).…”

“…The exchange of traffic safety messages in vehicular networks can be ensured by broadcasting periodic awareness messages such as CAM. In [8], we have considered 800 Bytes as maximal CAM size. However, exchanged local maps require larger packets size, since they carry a considerable amount of information, depending on the retained local map representation.…”

“…First, in Fig. 3, we evaluate the PDR in each case and we compare the results those obtained with 700-Bytes messages and MCS 5 (as considered in [8]). Note that a period of T =100 ms was considered for this evaluation.…”

“…Contrarily to the aforementioned research works, this paper addresses the impact of V2X connectivity on local occupancy maps fusion. To this end, we present a simulation model inherited from [7] and [8]. In comparison with [7], this new study considers (i) LTE-V2X connectivity as a substitute to ITS-G5, (ii) complete network simulations rather than using simplistic parametric models and finally, (iii) various test configurations and settings to illustrate the sensitivity of the taken approach with respect to key system parameters (incl.…”