Resource management in cloud radio access networks

Apparatuses and methods in a communication system are provided. The solution comprises operating a radio access network, where the radio access network comprises two or more resource tiers, each tier having different latency/timing requirements. The resource allocation for the radio access network is realised (200) with two or more control loops, where each control loop is configured to allocate resources with different latency requirements, and control resources between the tiers. Resources of the inmost tier are controlled (202) by an inmost control loop with lowest latency resource allocation, and resources of the outer tiers are controlled (204) by one or more outer control loops for less latency critical resource allocation, each outer control loop having less critical latency requirement compared to loops closer to the inmost loop.