Since launch of 3G services every strategist and research firms
reports has been talking about,backbone data
network explosion due to high
BW and data
consuming applications.
Other thing was to managing traffic intelligently to get maximum out of limited
network resources. (providing regulated
QoS as per application and customer).
So with these predictions operators have started looking for entity who can handle these issues.
The
obvious answer was an
functional entity from
IMS network (
NGN ) framework that is
PCRF(Policy and Charging Rule function)
. PCRF is an functional block in
IMS framework and not an device or network element with defined function and
boundary.
PCRF is collection of elements which will include many subsystems like policy manager with
administrator, subscriber repository and trigger manager (for
communication with network)
So as per
IMS framework, its
upto designer how he implements the
PCRF functionality. Indian operators have started implementation of
PCRF functionality in networks, with 3G
roll out itself.
However many are
struggling with this new ghost in town ,
because of misconceptions about
PCRF, lack of long term vision for cellular networks and lack of
readiness of
tailor made solutions by
OEMs(manufacturers).
Some of the operators have got this
PCRF as a COTS product (like Black box) , no one knows what it can do. There are
challenges in
implementation because this function need some
BSS data of customer (Billing info, customer
category, preferences) to do an network
monitoring and
controlling.
So integration between
BSS systems with
PCRF is very difficult as everyone was treating OSS/
BSS and network systems are
different silos with one narrow interface of provisioning.
After integrating PCRF in network ,now next challenge is
use cases which operators business team wants to implement and what COTS vendor is offering.
Because there are many so called killer use cases like URL based charging and QoS assignment,
Parental control, Real time speed and session monitoring.
Which are still not matured and getting trail and error-ed in operator network.