PCRF as an EPC component

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Evolution of mobile technologies, Evolved Packet core, management of Policy and Recharge through PCRF.

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PCRF as an EPC component

  1. 1. PCRF From pre-LTE to Broadband
  2. 2. Layout ● ● ● ● ● ● ● History. EPC as a concept. Objectives of EPC. Major functions of EPC. Policy and Charging Control. Benefits of Policy Control. Where it fits in Broadband network.
  3. 3. History I came, I saw, I conquered ! Julius Caesar
  4. 4. History - Basic Cellular Architecture
  5. 5. History - Cell Network Data - GPRS (115 kbps) - EDGE (473 kbps) - UMTS (2 Mbps) - HSDPA (14 Mbps) - LTE (100 Mbps)
  6. 6. EPC - Need and Standardization ● ● ● ● Explosion in Data traffic and usage patterns. Advance in microchip technology. 3GPP. Standardization benefits: ○ Freedom in choosing a vendor. ○ Market Expansion, cost reduction, increasd benefits.
  7. 7. EPC ● 3GPP work on SAE (system architecture evolution) work item. ● SAE was responsible for EPC (Evolved Packet Core Network) as an all-IP solution. ● EPC is designed to support high bandwidth services at high data rates.
  8. 8. EPC - Objectives ● New core network architecture to support high data rate and reduced latency. ● To support mobility between multiple heterogeneous access systems (WiMAX, CDMA, 3G, 2G). ● All IP architecture, to enhance the capability of 3GPP systems to cope with rapid growths in IP data traffic.
  9. 9. EPC - Major Functions ● ● ● ● ● Authentication and Security. Policy and Charging Control and QoS. Packet Routing. Mobility Management. IP Address Allocation.
  10. 10. EPC - Policy& Charging Control and QoS ● ● ● ● ● ● Segmented data plans. Traffic & quota management. Roaming. Bill shock prevention. Personalized alerts and promotions. Congestion control.
  11. 11. EPC - Policy & Charging Control and QoS
  12. 12. SPR ● Subscription profile repository. ● contains information such as user specific policies and data needed for subscriptionbased policies and bearer level charging rules by the PCRF.
  13. 13. Online Charging System ● OCS ● Credit management system for prepaid charging.
  14. 14. Offline Charging System ● OFCS. ● Receives events from the PCEF and generates charging data records (CDRs) for the billing system.
  15. 15. Application Function ● AF ● Offers applications that require the control of IP bearer resources. ● Communicates with the PCRF to transfer dynamic service information.
  16. 16. PCEF ● Enforces gating and QoS for individual IP flows on the behalf of the PCRF. ● Provides usage measurement to support customer charging. ● BRAS, BNG, ISG.
  17. 17. PCRF ● Policy and charging rules function. ● Provides policy control and flow based charging control decisions. ● Receives session information from Application function (AF) over Rx interface, subscription information from SPR over Sp interface as well as information from the access network via the Gx. ● Takes all the information and configured operator policies then creates a service session level policy decisions which are being enforced by PCEF.
  18. 18. Mapping to Broadband

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