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Active RAN sharing is a promising way to reduce both Capital Expenditure (CAPEX) and Operational Expenditure (OPEX) for mobile (virtual) network operators. Partial resource reservation is a flexible active RAN sharing technique that allows each operator to be guaranteed a minimum share of resources whilst also having access to shared common resources on a firstcome-first-served basis. This paper proposes a partial resource reservation scheme for Long Term Evolution (LTE) networks, addressing both scheduler and admission control aspects. System-level simulation results show: compared to Full Reservation schemes, our proposed scheme can flexibly allocate the shared resources to operators according to their actual traffic loads and traffic priorities, and thus, increase the spectrum utilization and the revenue of the network owner; compared to Complete Sharing scheme, it can provide minimum guaranteed performance for each operator.

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Admission control (AC) is an important feature in a wireless network by which radio resource usage is optimized whilst maintaining the Quality of Service (QoS) of existing users. In this paper, a novel admission control mechanism is proposed for the Long-Term Evolution (LTE) cellular networks. Simulation results show that the proposed AC can provide a more flexible trade-off between network and user performances compared to simpler approaches based on resource utilisation. It is also shown that a predictive approach provides a significant overall network performance gain at the expense of cell-edge blocking.