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LTE:How does policy control and charging works in LTE?

+8 votes
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LTE:How does policy control and charging works in LTE?
posted Oct 30, 2013 by Neeraj Mishra

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3 Answers

+2 votes

It is not simple to share everything here as it is have huge content and theory. Just sharing for the view

It is done by PCEF[GW] , PCRF.

All the policy control will be done via PCRF(Gx).

Online done via Gy between PCEF and OCS
Offline done via Gz between SPGW and OFCS.

answer Oct 31, 2013 by sivanraj
+1 vote

In the context policy and charging control, LTE uses PCEF and PCRF, OCS and OFCS nodes.
Are you looking for some specific interface messages or in general since it is a bigger topic ?

answer Oct 30, 2013 by Vikram Singh
+1 vote

A important component in LTE network is the policy and charging control (PCC) function that brings together and enhances capabilities from earlier 3GPP releases to deliver dynamic control of policy and charging on a per subscriber and per IP flow basis.

LTE Evolved Packet Core (EPC) EPC includes a PCC architecture that provides support for fine-grained QoS and enables application servers to dynamically control the QoS and charging requirements of the services they deliver. It also provides improved support for roaming. Dynamic control over QoS and
charging will help operators monetize their LTE investment by providing customers with a variety of QoS and charging options when choosing a service.

The LTE PCC functions include:

  • PCRF (policy and charging rules function) provides policy control and flow based charging control decisions.
  • PCEF (policy and charging enforcement function) implemented in the serving gateway, this enforces gating and QoS for individual IP flows on the behalf of the PCRF. It also provides usage measurement to support charging
  • OCS (online charging system) provides credit management and grants credit to the PCEF based on time, traffic volume or chargeable events.
  • OFCS (off-line charging system) receives events from the PCEF and generates charging data records (CDRs) for the billing system.

(done cheating from here http://lteworld.org/ltefaq/how-does-policy-control-and-charging-works-lte )

answer Oct 31, 2013 by Sanketi Garg
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