Approaches for multitier cloud structure management The number of IoT devices is constantly increasing every year. The volume of generated traffic is also increasing. Therefore, the new generation of 5G networks uses technology to reduce load and reverse delays  MEC. The MEC architecture is based on a multitier cloud structure, but official international documents do not define the principle at which architecture level a cloud computing is selected to manage the processing of user data. Therefore, in this article, we propose comparing three architectures for managing the choice of a cloud computing. It is proposed to implement a multitier cloud structure on the OpenStack platform.

Multitier EdgetoCloud Architecture for Adaptive Video Delivery In the last few years, there has been a rapid proliferation of a wide range of realtime video services and applications. These technologies flood the wireless systems with video content on a daily basis. As a result of this sharp increase in video traffic, the prospect of errors due to network interference and congestion rises. Incidentally, the adoption of the 5th generation of wireless systems (5G) will allow this growth to be even greater due to its high bandwidth capacity and low latency. However, even with these improvements on the wireless capabilities, a reliable and highquality video transmission still imposes several challenges, such as how to handle a large number of heterogeneous devices and how to better use the resourcericher Edge, Fog, and Cloud computing sources to meet the useru0027s requirements. To overcome these issues, this work proposes a multitier video delivery architecture relying upon several technologies such as Multiaccess Edge computing (MEC), 5G slices, and microservice placementchaining. Furthermore, to assess the proposed idea an experimental proofofconcept testbed of the multitier architecture was designed, implemented, and evaluated using realworld tools and actual video sequences. The results obtained supported our claim that a multitier video delivery system is feasible and can greatly benefit the endusers.