5G Network Slice - A URLLC Resource Allocation Perspective
Christiano A. P. Rodrigues, Dário Vieira, Miguel F. de Castro · 2021
The fifth generation wireless network, known as 5G, is the first network that was considered to meet some requirements to help IoT become a reality. 5G is also envisioned as a network that will support a diverse set of performance and service requirements and help create a wide range of vertical markets. One of the main facilitators of 5G that will provide such flexibility is slicing a single physical network into multiple isolated logical networks, each with different requirements. Different technologies have been studied to make it possible to create this end-to-end network on demand, such as Software Defined Networking (SDN), Network Function Virtualization (NFV) and Cloud Computing. However, allocating enough resources to guarantee the desired QoS for specific services even when this virtual network fails remains forgotten by the literature. In this paper, we identify challenges and open issues related to this subject. Moreover, we discuss relevant proposals and point some possible directions to overcome this problem.