As operators deploy LTE networks, monitoring and performance management will have a direct impact on competitiveness and profitability. Network-wide visibility is essential to protect revenues and ensure application interaction, service delivery and quality of experience. A real-time network view enables operators to understand and track performance and subscriber behavior. The ability to trace a single transaction, call or session end-to-end across different domains is fundamental to understanding and troubleshooting the interaction of network elements. As data traffic increases, operators need the capability to choose the type and quantity of data they collect so they can scale their monitoring systems and data collection incrementally.