# A Novel Energy-Efficient Reservation System for Edge Computing in 6G Vehicular Ad Hoc Network
## 1 Introduction
In order to sustain the increasing variety of intelligent transportation systems (ITS) as well as smart city applications, the VDTNs also integrate communications including vehicle-to-vehicle (V2V), vehicle-to-roadside-unit (V2R), and vehicle-to-infrastructure (V2I), as shown in Figure 1. The RSU has many functions, including the sharing of emergency messages and updating vehicles about the traffic situation. Cars travel at fast speeds, the network topology is dynamic, and vehicles must be separated frequently. While 6G technology has the potential to increase VANETs' effectiveness, various difficulties must be overcome before it can be extensively used. High-frequency operation is one of the main issues since 6G is planned to run at greater frequencies than the existing 5G technology, which might result in significant attenuation and signal loss. This can make maintaining consistent communication over a greater distance problematic, especially in metropolitan settings with high-rise buildings and additional obstructions. The adoption of sophisticated signal processing techniques such as holographic beamforming and large MIMO, which may boost system complexity, is also an issue. This complexity might make optimizing the system and ensuring reliable communication challenging [7]. Because 6G technology is currently in the early phase of advancement, no standardization initiatives are presently underway. This absence of standardization may contribute to mar ket fragmentation and make ensuring compatibility across different devices and systems challenging. To guarantee that communications are safe and shielded from assault, 6G must address security issues such as authentication, encryption, and privacy. At present, researchers remain focused on the multiple parameters to be improved in the static RSU (sRSU) to improve both V2V as well as V2I communication; however, in this paper, the research will focus on the mobile RSU (mRSU) [1], as shown in Figure 2.  
The mRSU is an emerging concept that has been highlighted in some papers during the last few years. This research presents the concept of the installation of RSUs in traffic police vehicles and public transport vehicles that remain in motion during patrolling; it helps to reduce the likelihood of packet loss during communication. As police vehicles remain in motion during patrolling, they cover the same group of vehicles, and the likelihood of packet loss is reduced because of a reduction in connection breakage and the re-establishment of communication among vehicles. Considering the multiple obstacles, 6G technology offers several opportunities in VANETs, notably the deployment of new, safety-essential features such as accident avoidance and emergency braking. Because of the low latency and great reliability of 6G technology, these features can be run in real time and offer correct knowledge to drivers. The technology will also allow for the development of novel traffic management strategies such as dynamic route optimization, traffic flow forecasting, and the real-time management of congestion. These strategies can assist in alleviating traffic congestion and enhance the overall transportation system's performance. High-definition maps, the real-time broadcasting of videos, and interactive entertainment experiences may all be enabled with 6G [8]. Figure 1: V2V and V2I communication. Figure 2: Mobile RSU. The aforementioned applications have the potential to improve the experience of driving, while also providing additional revenue opportunities for vendors of services. One of the most important prospects is that 6G technology, by offering high-bandwidth and low-latency transmission between vehicles and buildings, might allow new autonomous driving technologies. Vehicles may run more effectively and safely as a result, reducing the possibility of errors and enhancing the whole system of transportation.