The document discusses cross-layer optimization between service providers and content-aware network providers in the ALICANTE system for multimedia distribution. The ALICANTE system defines environments for users, services, and networks. It introduces a virtual content-aware network (CAN) layer and home boxes for media processing. Service level agreements between service providers and CAN providers establish virtual CANs and specify connectivity, traffic processing, and service requirements. The system aims to optimize resource provisioning between actors and media flow adaptation through monitoring.