## 2 Importance of URLLC  
Although all three categories defined by ITU have their significance as shown in Table 1. URLLC has recently been very intriguing for researchers worldwide. A field experiment carried out by the NTT DOCOMO Inc. and Huawei on URLLC showed quite positive results [5]. Achieving URLLC requirements is quite a challenge for 5G networks and will require massive modifications to the system design of the current telecom infrastructure. Owing to the encouraging results achieved with URLLC, it can play an integral role in the 5G era. Although current user requirements are initially based on high bandwidth, latency and reliability are also expected to play a vital role in real-time applications and mission-critical networks. Table 2 clearly highlights the importance of reliability and latency in future applications. \begin{table}
\begin{tabular}{p{113.8 pt} p{113.8 pt}} \hline \hline
**Latency** & **Basic Features** \\ \hline eMBB & eMBB focuses on a higher data rate, with a large payload and prolonged internet connectivity based applications. Potential applications could include cloud office/gaming, virtual/ augmented reality (VR/AR) and three-dimension/ultra-high-definition (3D/UHD) video. \\ URLLC & URLLC focuses on an ultra-responsive connection with ultra-low latency. The data rate is not expected to be very high in URLLC, but offers high mobility. Potential applications of URLLC include industrial automation, autonomous driving, mission-critical applications, and remote medical assistance. \\ mMTC & mMTC focus on providing connectivity to a large number of devices (IoTs), but with low reliability. It can provide long-range communication with energy efficiency and asynchronous access. Such features are very suitable for low power devices in a massive quantity. \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Intended features for the categories defined by the International Telecommunication Union (ITU) [3,4]. URLLC, ultra-reliable low latency communications; eMBB, enhanced mobile broadband; mMTC, massive machine-type communications. \begin{table}
\begin{tabular}{p{113.8 pt} p{113.8 pt} p{113.8 pt}} \hline \hline
**Industry** & **Application** & **Importance of Reliability and Low Latency** \\ \hline Medical and Health Care & Remote surgery/patient diagnosis. & Remote surgery or remote patient’s diagnosis might be carried out with the help of a robot. In such cases, the reliability of data transmitted as instruction for robot needs to be ultra-reliable because even a slight latency or delay could be very harmful to the patient. \\ Media/ Entertainment/ Business & Live reporting of an event, live sports events, online gaming, cloud-based entertainment (VR/AR). & With the help of technology, the entire world is shrinking in terms of communications. Users desire to be up to date on world events and entertainment in real-time. Even in terms of business, the delay could make a huge impact on trades carried out in the world. In online gaming, the lag could be very frustrating for gamers. \\  & Drone-based delivery, remote driving, self-driven cars, traffic management, sub-station management (system synchronization, traffic management) & Through new features and attractions for users such as Amazon Prime Air [8] to deliver orders, it is very important for drones to respond in real-time. Similar to Amazon Prime Air, Google’s self-driven car (WAYMO) [9] is quite important for the future automobile industry. The importance of reliability and latency is self-explanatory in such projects. \\  & Control systems, automated assembly lines with robots, machine status reports, surveillance, power grid management. & In order to maximize productivity, industries have moved toward automation. Higher reliability and productivity can be obtained by replacing humans with robots in the manufacturing process. Apart from the manufacturing industry, the agriculture, journalism, and education sectors have also moved towards automation [10]. In the mentioned industrial areas, reliability will be a key factor.