LTEV2Vsim: An LTE-V2V simulator for the investigation of resource allocation for cooperative awareness

Abstract

1 With the increasing needs of the automotive industry, 3GPP is developing new functionalities in the long term evolution (LTE) cellular technology to specifically address vehicleto-everything (V2X) connectivity, including in particular vehicleto-vehicle (V2V) direct communications. At the basis of most enabled applications, either dealing with safety, traffic management or infotainment, it is of particular importance the cooperative awareness service, corresponding to messages sent periodically in broadcast by all vehicles to inform about their status and intentions. To optimize the usage of radio resources, allocations of packets are required to be smartly performed, following algorithms that currently represent a challenging open issue. Having in mind to face the design and validation of resource allocation in LTE-V2V networks when cooperative awareness is addressed, we implemented a simulator, called LTEV2Vsim, which will be shared with all the interested researchers. LTEV2Vsim is written in MATLAB and manages vehicles mobility either following simple models or more complex and realistic input files, and performs allocations following different implemented algorithms, both network controlled and autonomous. Finally, to demonstrate the possibilities of LTEV2Vsim, some example results are provided.

Study of the Impact of PHY and MAC Parameters in 3GPP C-V2V Mode 4

“…The results shown in the further have been obtained using the LTEV2Vsim simulator [14], which was designed for the investigation of resource allocation algorithms in C-V2X. In this section, a brief description of the main models and settings used for the simulations is provided.…”

“…Let us first focus on the average duration before a reallocation is performed. Following the algorithm at the MAC layer, the [5][6][7][8][9][10][11][12][13][14][15] Table 1 are used for all the other settings.…”

“…The study will focus on the semi-persistent scheduling (SPS) related to the cooperative awareness service, which is the periodic broadcast of updated information by all vehicles about their status and movements and is at the basis of most of the applications foreseen for connected vehicles [12], [13]. The impact of each parameter and its optimal setting is derived through large-scale simulations in three realistic scenarios with hundred of nodes, using LTEV2Vsim [14].…”

Enhanced Collision Avoidance for Distributed LTE Vehicle to Vehicle Broadcast Communications

“…According to the Release 14 of LTE standards, V2V services can be supported over PC5 interface through either centralized scheduling by the eNodeBs or distributed scheduling by the vehicles [4], [5]. Centralized broadcast scheduling can have very high broadcast reliability, but it has a large signalling overhead on vehicle position update and resource allocation [6]- [9]. Distributed scheduling with autonomous resource selection is more scalable and can work when eNodeB cover is not available.…”

“…Performance gains with collision avoidance (CA) and location based resource allocation enhancements were reported for autonomous resource selection in [4], [10]. However, these enhancements have many design options and parameter settings, the impact of which have not been well studied in the literature [4], [5], [9], [10].…”