EPG- Evolved Packet Gateway
The EPG
combines the GGSN, SGW and PGW functions in one physical node. In addition, the
evolved platform adaptation layer supports the EPG application running on both
operating systems: Junos OS (the OS of Juniper M series routers) and IPOS (the
OS of Smart Services Router),
The EPG is
available on different hardware platforms:
·
Juniper (M320, M120)
·
Smart Services Router (SSR 8020)
The EPG
based on Juniper hardware is simply called EPG on Juniper and the EPG based on
SSR hardware is respectively called EPG on SSR. In the EIN documents, these
terms are used to distinguish between these hardware platforms. If the hardware
platform does not matter, the EPG term covers all possible EPG configurations.
The EPG on
SSR has an increased capacity, up to 10 times greater than the EPG on Juniper.
Therefore, the EPG on SSR has a big impact on the PS core network, and this
needs to be sustained in terms of capacity from the other PS network elements
and transmission systems.
The EPG on
SSR is not a product designed only for high capacity networks. Its scalable
configuration suits it perfectly for small and medium networks with potential
for further extensions.
The EPG can
be ordered and deployed in the following deployment modes for
single and combined functions:
·
GGSN only functionality
·
PGW only functionality
·
SGW only functionality (applicable only to EPG on SSR)
·
Combined SGW and PGW
·
Combined GGSN and SGW and PGW
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