## 1 Introduction
The goal is to encourage the development of an open system that enables participation from various corporations, recognizing the critical importance of this ecosystem. As Beyond 5G/6G evolves into an open platform, key stakeholders, including service developers, end users, communication device manufacturers, network operators, and algorithm providers, will be able to collaborate more freely to improve its capabilities [14]. This collaborative environment will foster the continued growth of Beyond 5G/6G, positioning it as a cornerstone of global social infrastructure. In the physical space, 6G aims to expand beyond the conventional 2D terrestrial network by integrating non-terrestrial networks into a fully immersive 3D infrastructure. This evolution will take us beyond traditional mobile networks based primarily on smartphones to a comprehensive ecosystem that seamlessly connects private wireless systems, next-generation wireless local access networks, high-altitude platform stations (HAPS), and satellites [5]. In addition to wireless networks, optical networks will be seamlessly integrated to enable ultra-low latency and high-capacity communication between edge computing devices, edge clouds, and data centers. Establishing such a unified network will allow for the adaptive utilization of all available resources, ensuring uninterrupted service for all users. Notably, the management and orchestration of these interconnected networks will enable the dynamic selection of the optimal communication channel, whether terrestrial or non-terrestrial, ensuring users' connectivity needs are met anytime and anywhere across diverse environments. The three primary service scenarios anticipated for 6G are enhanced mobile broadband (eMBB), ultra-reliable and low latency communication (URLLC), and machine-type communication (MTC) [14]. Enhanced mobile broadband [16] aims to support ultra-high data rate applications such as virtual reality (VR), extended reality (XR), and high resolution streaming (e.g., 4K video). URLLC [17] targets real-time applications requiring both high reliability and low latency, including remote surgery, autonomous vehicles, digital twins, and industrial automation. MTC [18], on the other hand, focuses on massive-scale, low-power connectivity for IoT devices, characterized by sporadic but highly diverse traffic patterns. While these categories are based on the same types of services that were first introduced in 5G, real-world deployment has shown that achieving widespread adoption is more complex than initially projected. In many cases, the absence of use cases and viable business models has limited the practical realization of these capabilities. Therefore, in the context of 6G, it is important not only to focus on advancing the technical foundations of these service types but also to consider the ecosystem readiness, economic reasons, and user demand that are essential for turning these ambitions into reality. To meet the growing demands of wireless communication systems, higher frequency bands such as millimeter-wave and sub-terahertz must be utilized to achieve higher data rates with lower spectrum efficiency for short-range applications. Additionally, tapping into unused spectrum resources will significantly enhance network capacity, which is crucial for enabling emerging services such as the metaverse. One notable example of an underutilized yet highly valuable frequency band is FR-3 (7-24 GHz). Despite its immense potential, this band has largely been overlooked due to the presence of pre-existing critical wireless systems, such as satellite communications and radar. However, significant portions of its spectrum remain unexploited, presenting a unique opportunity for expansion. To harness the benefits of higher frequency bands, their inherent challenges, such as propagation losses and hardware limitations, must be addressed through innovative solutions.