An Optimised RRM Approach with Multi-Tenant Performance Isolation in Virtual RANs

One of the major potential benefits in wireless network virtualisation is enabling on-demand sharing of resources among different tenants in an isolated manner. This paper aims to propose a model for Radio Resource Management (RRM) among multiple Virtual Network Operators (VNOs) to address all their Service Level Agreements (SLAs) independently, as well as satisfying their customised service requirements to the highest achievable level. Performance isolation is attained by realising a centralised virtualisation platform called Virtual-RRM. This entity is responsible for sharing the total capacity obtained by aggregation of all the radio resource units from different access technologies, according to the service demands of the VNOs and considering service priorities. In order to evaluate model performance, a practical scenario with 3 types of SLA contracts is proposed, while all VNOs are in charge of providing the 4 service classes to their users. Results under different traffic loads and network parameters show that all VNOs' SLAs are satisfied to the maximum feasible point, 100% of the available capacity is utilised independently from the variation of network parameters, and when possible capacity is shared among the different services according to the concept of proportional fairness.