PRX-PE is a policy enforcement and monitoring system. It is designed
for seamless integration with third-party policy control and quota
management systems. It can also forward traffic to IP service platforms
and provide real-time data to accounting, charging and billing systems.
In
3G mobile networks it assumes the role of the Policy and Charging
Enforcement Function (PCEF), receiving and requesting rules from the
Policy and Charging Rules Function (PCRF).
PRX-PE sends statistical data to a policy management system and receives
subscriber policy information from it. PRX-PE provides two interfaces:
the Policy Interface (PI) and the Messaging Interface (MI). Additionally,
PRX-PE provides a Provisioning Interface (PVI) for general system setup
and manage- ment. PRX-PE only enforces policies. Policy decisions
(e.g. quota or service plan decisions) are made at the external policy
manager and then sent as real-time rules to PRX-PE.
Key Features
- Carrier-grade performance at 70 Gbit/s, 10 million packets/s and 7 million concurrent subscribers
- High availability and full hardware redundancy
- Unmatched DPI accuracy certified by independent test lab: “Close to 100% detection & regulation accuracy”
- Seamless integration with third-party policy, accounting and charging systems
- Completely invisible to network users
- Comprehensive tunnel management
Solutions Overview
- Subscriber policy enforcement based on policy rules from an external policy manager
- Enforce priorities, bandwidth guarantees and limits
- Traffic redirection of selected IP traffic to a value-added service platform
- Subscriber-aware usage statistics to charging or quota management systems
Deployment in 3G Mobile Networks
PRX-PE is placed inline between the operator´s network gateway (e.g.
GGSN,
PDSN or
BRAS) and the edge router. Its support for real-time decapsulation
of all relevant encapsulations and tunneling protocols, including
GTP,
IP-in-IP,
GRE,
L2TP, provides the necessary flexibility for seamless
integration into the operators' existing infrastructures.
As an inline system, PRX-PE sees the entire data traffic and uses its deep packet
inspection engine for application-layer quality-of-service and bandwidth
management. It provides all the carrier-grade performance, availability
and
DPI precision required for such a critical infrastructure element.
