Policy and Charging Rules Function(PCRF)

Policy and Charging Rules Function (PCRF), is the part of the Evolved Packet Core (EPC) that supports service data flow detection, policy enforcement and flow-based charging. It offers a comprehensive solution that enables a new generation service provider to offer multiple use cases that allow them to better control their services and align their revenue with their resources.
Policy and Charging Rules Function(PCRF)
Functions
Distributed structure
Modular design 
In-memory data management 
Multi-level data backup
Flexible strategy control abilities
Seamless geographic redundancy solution
Large capacity and high degree of integration
Opening data access interfaces
Fully integration of fixed and mobile services
BE(End Back) and FE(End Front) Separation
IPLOOK's Virtualized PCRF
Generate higher revenue on fixed and mobile networks
IPLOOK PCRF determines the allowed traffic types in real-time. It also checks how to account for the traffic. Operators use this information for billing purpose.
The User Data and Server Process of  IPLOOK PCRF are separated to BE (End Back, subscriber data storage and operations) and FE (End Front, process the signal and service logic).
IPLOOK can provide a fully integrated of fixed and mobile networks PCRF solution which helps in creating a lucrative and innovative platform for operators. PCRF can also be integrated with different platforms like billing, rating, charging, and subscriber database or can also be deployed as a standalone entity.
▫  Rich data, voice and SMS service
▫  Support group short number service for enterprise
Features
 
SPR Data Management
»  SPR user and subscription information storage and management
»  SPR supports restful Service configuration and user signing Interface
»  SPR Network element configuration Management
»  SPR supports remote disaster recovery
Dynamic policy control
»  Dynamic Policy Control based on usage
»  Dynamic Policy Control based on time period
»  Dynamic Policy Control based on Service area
»  Dynamic Policy Control based on Terminal Type
»  Dynamic Policy Control based on shared usage
»  Dynamic Policy Control based on APN
High performance Policy Engine
»  PCRF redundant backup Design
»  Overload control function
»  Subscriber area roaming restriction
»  Multiple PCEF access support
»  PCRF Network element Fault alarm report
Modular design
»  PDI:PCRF Diameter Interface
»  PSC:PCRF Session Control
»  PPC:PCRF Policy Control
»  PE:Policy Engine
»  DPU:Data Processing unit
»  DRU:Data routing unit
»  DBMS:Data Base Management System
»  DSG:Data Service Gateway
Interface comply to 3GPP R13 release
»  Gx: between the PCRF and PGW, allowing the PCRF direct control over the policy enforcement functions of the PGW
»  Rx: between the PCRF and IMS
Operation and Management
»  Web Client
»  OMC Client
»  Open Northbound interface and graphical web based management interface
Support Geo redundancy
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With the development of network technology, smartphones, laptop computers have been widespread. Unlike traditional wired phones, mobile smartphones allow users to easily access the Internet, download or upload files, and use different applications.

Long Term Evolution/Evolved Packet Core (LTE/EPC) is an innovation which depends on GSM/EDGE and UMTS/HSPA technologies, can increase the capacity and speed using a different radio interface together with core network improvements. EPC refers to a core network architecture that aggregates access networks including LTE, 3G or 2G.
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A Home Subscriber Server(HSS) / Home Subsriber Register(HLR) serves as the primary database repository of subscriber information within a LTE/EPC or IMS network core. By centralising all the subscriber information in a single place it allows the signalling to be separated from policy providing a stream lined, high performing network.
Learn More
xGW(SGW/PGW)
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SGW(Serving Gateway)
The SGW node handles the user data traffic, but isn' t responsible for the signaling data used. It transports IP data from UE's to the LTE Core Network. The SGW also routes incoming and outgoing IP packets for better system collaboration and serves as an anchor for the UE when it moves from one eNodeB to another.

PGW (PDN Gateway)
PGW is the network node that connects the EPC to external IP networks. What the PGW does is that it routes packets to and from external IP networks. Beyond that, it also allocates an IP address to all UEs and enforces different policies regarding IP user traffic such as packet filtering.
Learn More
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