# VNF-Enabled 5G Network Orchestration Framework for Slice Creation, Isolation and Management
## 2 Related Literature
### Techniques for Network Slice Isolation and Management  
The subject of resource allocation for RAN slicing is the focus of the research in [19, 20, 21]. Their research looked into how the heterogeneous cloud radio access network (H-CRAN) architecture allocated both baseband and radio resources, according to the authors of the paper. The issue is set up using the Mixed Integer Linear Programming (MILP) method, and it is solved using the Lagrangian dual strategy, which is not convex. The problem of allocating the resources of sensor network slices in the context of sensor network slices were discussed in [22]. Their solution was to develop a standardized architecture for controlling application acceptance and allocating slice resources. A heuristic technique is used to solve the problem of joint optimization in this case. Radio Access Network (RAN) and core network resource allocation are studied in [23], which present an end-to-end quality of service architecture for 5G networks. Using complex network theory, the authors of [24] propose a method for optimizing resource utilization while simultaneously reducing expenditures on research and development. Two stages are recommended in the technique that has been proposed: (i) creating virtual network functions, and (ii) choosing link paths for the virtual network functions. In addition, the viability of the proposed method is demonstrated by contrasting the simulation outcomes attained through the application of the Simulated Annealing (SA), the LVA, and the GLL-based VNF placement techniques.  
In reference [25], it was proposed that a Network Topology Attribute and Network Resource-Considered method (VNE-NTANRC) may be utilised in combination with a Service Provider (SP) approach to mapping the connections between nodes. This algorithm would consider five different network topology attributes and global network resources. A study published in [26] investigated the topic of radio resource allocation in Fog Radio Access Network (F-RAN) slicing. A Stackelberg game between the global radio resource manager and the local radio resource manager is depicted as a \"stacking\" Stackelberg game in the context of an organizational hierarchy. Among the several multi-criteria decision-making techniques, the VIKOR method was utilised to rank the nodes in [27]. The process of establishing a virtual network node is identical to that of a physical or logical network node. [PERSON]'s method of link provisioning involves assigning the shortest possible path to the slice request nodes. Using Stochastic Network Calculus (SNC), the delay bound in 5G mobile networks for a specified traffic distribution and resource allocation was determined [28].  
Upper-tier First with Latency-bound Overprovisioning Prevention (UFLOP) is a method created to optimise capacity and traffic sharing in two-tier 5G slicing networks while meeting renters' latency constraints [29]. Incoming traffic is analysed in accordance with the services offered to tenants and the assets needed to supply resources, and any necessary adjustments are then suggested by the method. [30] describes a technique for service provisioning in RAN slicing that guarantees not only that QoS criteria, but also those for bandwidth and compute capacity, are met. This technique is being utilised to decrease the bandwidth required to provide services. It was suggested by [31] to solve the issues of scalability, monitoring, and aggregation of slice-level measured data that arise while tracking the efficiency of individual parts of a network.