A dynamic spectrum arbitrage (DSA) system includes a home subscriber server (HSS), a mobility management entity (MME), an eNodeB, a dynamic spectrum controller (DSC), and a dynamic spectrum policy controller (DPC). The DSC may receive resource allocation information from the DPC, and send updated information and instructions to the HSS. The HSS may be configured to receive information from the DSC, detect changes to HSS subscription information (e.g., user profile information), determine whether the changes affect the information managed/stored by an MME component, and send the detected changes to the MME component when the HSS determines that the changes affect the information managed/stored by the MME. The MME component may use the information included in the received messages to add, remove, or modify the MME's stored subscription information or user profile information. The MME component may then communicate these updates, additions, or changes to the HSS component.