# Supporting Immersive Video Streaming via V2X Communication
## 1 Introduction
This device enables secure, efficient, environmentally friendly, and high-speed data transfer. [PERSON] et al. [33] examine Li-Fi technology, which utilizes light-emitting diodes as the transmission module. The study explores the characteristics, communication methods, and key system technologies for high-speed data transmission, subsequently applying these in V2V communication. Additionally, 6G will incorporate a range of emerging communication technologies, such as millimeter-wave (mmWave) and Terahertz (THz) wireless communication. These technologies benefit from their short wavelengths, allowing for significant spatial reuse and enabling higher bandwidth and transmission rates. Researchers like [PERSON] et al. [34] addressed content distribution scheduling issues in mmWave vehicular networks, while [PERSON] et al. [35] focused on low-complexity vehicle tracking and resource allocation methods for THz V2I communications in vehicular networks. [PERSON] et al. [36] studied the joint caching and scheduling strategy in 6G vehicular networks, enhancing request hit probability and the number of concurrent transmissions. However, in traditional cellular networks, signal strength and inter-cell interference severely limit the performance at cell edges, which has always been a major bottleneck for any mobile network. Recently, cell-free (CF) systems have attracted increasing research attention and demonstrated their strong potential in mobile communications. CF systems deploy a considerable number of geographically distributed antenna access points. These access points are connected to a wireless access point control unit via high-speed optical fiber or wireless backhaul/fronthaul links. The wireless access point control unit operates all antenna access points as a whole without cell boundaries, using spatial multiplexing technology to serve all users on the same time-frequency resources. This technology allows vehicles to continuously enjoy network services while moving, avoiding the additional overhead of frequent handovers [37]. [PERSON] et al. [38] studied the scheduling of communication and computing resources in the mmWave cell-free downlink transmission architecture of urban vehicular networks, improving the performance of low-latency data transmission. As a natural evolution of contemporary large-scale multiple-input multiple-output (MIMO)technology, Extremely Large-Scale MIMO (XL-MIMO) further increases the number of antennas by at least an order of magnitude, thereby unprecedentedly improving the spectral efficiency and spatial resolution of wireless communication and sensing. Consequently, XL-MIMO is considered a key technology for 6G to meet several stringent KPIs, such as peak data rates, spectral efficiency, reliability, and precision in positioning and sensing [39]. [PERSON] et al. [40] studied CF XL-MIMO systems with base stations equipped with XL-MIMO panels in dynamic environments, providing dynamic strategies to address high-dimensional signal processing challenges. As autonomous driving technology advances, passengers in vehicles will have the opportunity to engage in a broader range of entertainment activities while on the move. This evolution in video applications is expected to significantly increase the demand for bandwidth within vehicular networks, potentially leading to bandwidth shortages, especially in congested traffic areas. To address this challenge, this paper presents a method for bandwidth allocation for vehicle video applications within the framework of V2X networks. The main contributions of this study are as follows:  
* This study employs THz and mmWave frequency band technologies, while also introducing CF XL-MIMO systems to further enhance system coverage, providing efficient and stable bandwidth for constructing a comprehensive vehicular network environment for vehicle passengers.