A Low-Complexity Location-Based Hybrid Multiple Access and Relay Selection in V2X Multicast Communications

TL;DR

This paper proposes a low-complexity, location-based hybrid multiple access and relay selection scheme for V2X multicast communications, effectively managing interference and enabling low-latency vehicle-to-everything data transmission without channel state information.

Contribution

It introduces a novel low-complexity location-based hybrid MA algorithm and relay selection method tailored for interference management in V2X multicast scenarios.

Findings

Effective interference mitigation in V2X multicast

Low-complexity relay selection without channel state info

Enhanced low-latency vehicle communication

Abstract

This study investigated relay-assisted mode 1 sidelink (SL) multicast transmission, which encounters interference from mode 2 SL transmission, for use in low-latency vehicle-to-everything communications. To accommodate mode 1--mode 2 SL traffic, we use the hybrid multiple access (MA) approach, which combines orthogonal MA (OMA) and nonorthogonal MA (NOMA) schemes. We introduce a low-complexity location-based hybrid MA algorithm and its associated relay selection that can be used when SL channel state information is unavailable.