# Enhancing the Reliability of Cellular Internet of Things through Agreement  
[PERSON]  
1 Department of M-Commerce and Multimedia Applications, Asia University, 500 Lioufeng Rd., Wufeng, Taichung 41354, Taiwan; [EMAIL_ADDRESS]  
2  
[PERSON]  
energy, spectrum and signaling overhead, 5G wireless networks have added new enhancements to the communications of CloT. Especially in the case of low 5G complexity, narrowband radio technology is considered to support the large-scale deployment of low-throughput, low-power devices [4]. As the technologies of communication become more and more mature, the diversity of application fields and communication requirements is reflected. With the continuous development of conventional technologies and the entry of existing technologies into new application areas, this environment is continuing to develop rapidly. In this case, the emergence of 5G communications represents new opportunities and challenges. The 5G communication support for a large number of devices has truly realized the vision of the global IoT. In addition, because of the focus on the integration of heterogeneous access technologies, 5G may play the role of a unified interconnection framework to promote the development of \"things\" and the Internet [5]. With the CloT billions of IoT-enabled devices worldwide can connect to the Internet. Advanced CIoT technologies include LTE-M, NB-LTE-M, NB-IoT, and 5G [6]. The CIoT provides the reliable connectivity required for IoT devices, the global coverage of the IoT, and low-cost hardware. In terms of value, the CIoT market is expected to grow rapidly at a compound annual growth rate of 27.10% [7]. Because it has great potential to transform machine-to-machine and machine-to-human communication, many technology companies are investing in the CIoT market. It is predicted that there will be more than 45 billion connected devices in the world in the future, of which 30 billion will be connected through IoT [7]. A feasible CIoT was proposed by [PERSON] et al. [8], it can implement mobile edge computing (MEC) and the IoT in a dense cellular network to provide a highly flexible and reliable CIoT platform. In this study, this feasible CIoT platform was applied and named MECIoT (MEC-based CIoT). The advantages of MEC are used in MECIoT and applied in the related applications of IoT. In other words, with the characteristics of MEC, MECIoT can provide IoT-related applications with better performance, better energy efficiency, faster response time, scalability, and better localization accuracy. Since CIoT is a distributed computing system, it can provide the applications that users need [9]. In a distributed computing system, PUs located at different locations or at the same location can provide more resources and computing capabilities through their connections and collaborations to obtain greater advantages. However, in many cases, there may be faulty PUs in the distributed computing system, which makes the distributed computing system unable to provide highly reliable services. Therefore, reaching an agreement, such as the time stamp or the location of each PU, in a distributed computing system that may have faulty PUs is one of the core issues of fault-tolerant distributed computing [10; 11]. With the agreement, many applications can be implemented, such as the task of locating the location of the copied files in a distributed environment [12; 13], a two-phase commitment can be made in the distributed database system [14; 15] and the landing task controlled by the flight control system [16; 17]. The agreement problem has been also studied and applied extensively in diverse areas including control systems, optimization, distributed computing, and emerging areas such as robotics, blockchain, and IoT [18; 19]. In addition, many applications of CIoT provide users with convenience. But for users, the system must provide better reliability and fluency [20]. In order to provide a highly flexible and reliable CIoT, MECIoT is used in this research. In MECIoT, many PUs are interconnected.