5G networks: Types of isolation and their parameters in RAN and CN slices Abstract   In this paper, we present a systematic overview of existing isolation techniques in nodes and networks, especially in the Radio Access Network and the Core Network (RAN and CN) to give a background to standardized methods of calculating an isolation level leading to secure EndtoEnd (E2E) slicesxe2x80x99 isolation. We present specific isolation technologies used in layers of 5G RAN and CN. For RAN and CN slices we propose several isolation properties and parameters to enable qualitative and quantitative characterization of the isolation. Finally, we present our approach that makes it possible to establish the common level of isolation for an E2E slice in the 5G network. To illustrate how such an isolation model works in practice, we give numerical examples of calculating an isolation level for simple network slices.

Enhanced Radio Access Procedure in Sliced 5G Networks In this paper, we introduce the concept of Random Access Channel (RACH) resource slicing and investigate the performance of a sliced Radio Access Network (RAN). We consider three generic service types that the fifthgeneration (5G) wireless technology is claimed to support, and refer to them as enhanced mobile broadband (eMBB), massive machinetype communications (mMTC), and ultrareliable low latency communications (URLLC) slices. Each slice can be configured with dedicated and shared subsets of RAN and RACH resources, also known as RACH preambles. We propose an analytic framework that allows us to obtain the blocking probability of each slice in a closedform. We compare different resource allocation policies in sliced radio access system and investigate their impact on a slice performance.