# 5G Mobile Services and Scenarios: Challenges and Solutions
## 2 5G Technical Scenarios  
This section presents 5G vision and requirements, and summarizes the main technical scenarios, challenges, and key enabling technologies for 5G. The key features and core technologies are extracted to form 5G concept. IoT and Mobile Internet will become the main driving force for the evolution of mobile communications towards 2020 and beyond. In the future, 5G will need to fulfill diverse service requirements in all aspects of life such as work, leisure, and transportation. Ultimate service experiences include Super Ultra-High Definition (S-UHD) videos, augmented reality, virtual reality, cloud desktop, edge cloud computing, and online gaming. Moreover, 5G will penetrate the IoT and achieve Internet of Everything (IoE) to accomplish diverse service requirements of transportation, manufacturing, medicine, and other vertical industries.  
5G will solve the challenges stemmed from the drastically different performance requirements in a wide range of diversified scenarios, where different Key Performance Indicators (KPI) such as user experienced data rate, traffic volume density, latency, energy efficiency, and connection density might be challenging. Four typical technical scenarios of 5G are derived from the main application  
\begin{table}
\begin{tabular}{l c} \hline \hline
**Categories** & **Services** \\ \hline \multirow{3}{*}{\begin{tabular}{l} Immersive 5G Service \\ \end{tabular} } & Massive Contents streaming \\  & Virtual Augmented Reality \\  & Telepresence \\ \hline \multirow{3}{*}{\begin{tabular}{l} Intelligent 5G Service \\ \end{tabular} } & Crowded Area Service \\  & User-centric Computing \\  & Edge/FOG Computing \\ \hline \multirow{3}{*}{\begin{tabular}{l} Omnipresent 5G Service \\ \end{tabular} } & Smart Personal Devices/Health \\  & Smart Building/Grid \\ \cline{1-1}  & Smart City/Smart Factory Systems \\ \hline \multirow{3}{*}{\
\begin{tabular}{l} Autonomous 5G Service \\ \end{tabular} } & Smart Transportation/Teleoperation \\  & Drone-based 3D connectivity \\ \cline{1-1}  & Robot-based Service \\ \hline \multirow{3}{*}{
\begin{tabular}{l} Public 5G Services \\ \end{tabular} } & Private security and Public Safety \\ \cline{1-1}  & Disaster Monitoring \\ \cline{1-1}  & Emergency Service \\ \hline \hline \end{tabular}
\end{table}
Table 1: Summary of five service categories of 5G.  
scenarios, service requirements, and key challenges of mobile internet and IoT: high-capacity hot-spot scenario, low-power massive-connections scenario, seamless wide-area coverage scenario, and low latency high-reliability scenario [8; 9]. Along with this, the above-mentioned technical scenarios have key issues, which are given in Table 2.  
Further use cases are expected to emerge, which are currently not anticipated. For future 5G, flexibility will be necessary to adapt to new use cases that come with a wide range of requirements [10]. The research forums and other external organizations wishing to contribute to the future development of 5G are encouraged to focus especially in the following key areas [11]:  
1. Spectrum related issues [12]
2. Traffic characteristics [13]
3. Radio interface(s) and their interoperability [14]
4. Access network related issues [12]