Wireless resource management in sliced networks based on isolation indexes

In the fifth/sixth generation (5G/6G) communication networks, network slices are formed where resources and infrastructures are shared among slices. Therefore, it is important to share the scarce wireless resource among slices efficiently and to achieve quality of service (QoS) requirement and the resource isolation of each slice. Most of the researches allocate slices wireless resource based on the QoS requirements of the slices, such as transmitting rate, where the resource isolation is ignored. Therefore, this paper designs the wireless resource allocation in sliced networks, where the QoS requirements and the resource isolation requirements are both achieved. To this end, one isolation indice is defined for each slice considering the performance of both the QoS requirements and the resource isolation requirements for the mobile terminals (MTs) served by this slice. And wireless resource is assigned to the slices based on their resource assignment parameters, which are adjusted according to the isolation indices periodically. To design the adjustment scheme, two optimization problems are formulated to minimize the system utility by setting the slices’ resource assignment parameters properly. By the optimization problem, the system tries to assign the slices minimal wireless resource they require to meet the QoS and the resource isolation requirements. To solve these problems, two heuristic algorithms are proposed where the resource assignment parameters are proportional or inversely proportional to the isolation indices and updated periodically. By simulating, it is proved that the proposed wireless resource management based on isolation indices in sliced networks can assign the slices wireless resource effectively.