centre, stores the subscription-related information to
support the network entities handling calls and sessions.
It generates fresh key material over demand.
Serving Gateway
-S-GW is the local mobility anchor, controlling the
packet routing and forwarding tasks, beside of other
transport level functions. It implements quality-ofservice
(QoS) functions and lawful interception features.
Packet Data Network Gateway
-P-GW acts as intermediate between the operator
network and Internet, providing IP address for each
UE and recording service charges.
Serving GPRS Support Node
-SGSN provides compatibility with packet switching
services of old access networks, such GERAN (GSM
system) or UTRAN (UMTS system).
-On the other hand, the radio access network acts as a
link between the User Equipment (UE) and the core network.
EUTRAN Node B (eNB) entities provide services to the end
user, by means of the radio channels. After release 10, support
for Relay Nodes (RNs) and Home EUTRAN Node B (H-eNB)
or femtocell are added to provide a wide coverage area without
minimising QoS. A group of H-eNBs may be gathered and
addressed to a Home EUTRAN Node-B Gateway, reducing
the number of interfaces linked directly with the core network.
centre, stores the subscription-related information to
support the network entities handling calls and sessions.
It generates fresh key material over demand.
Serving Gateway
-S-GW is the local mobility anchor, controlling the
packet routing and forwarding tasks, beside of other
transport level functions. It implements quality-ofservice
(QoS) functions and lawful interception features.
Packet Data Network Gateway
-P-GW acts as intermediate between the operator
network and Internet, providing IP address for each
UE and recording service charges.
Serving GPRS Support Node
-SGSN provides compatibility with packet switching
services of old access networks, such GERAN (GSM
system) or UTRAN (UMTS system).
-On the other hand, the radio access network acts as a
link between the User Equipment (UE) and the core network.
EUTRAN Node B (eNB) entities provide services to the end
user, by means of the radio channels. After release 10, support
for Relay Nodes (RNs) and Home EUTRAN Node B (H-eNB)
or femtocell are added to provide a wide coverage area without
minimising QoS. A group of H-eNBs may be gathered and
addressed to a Home EUTRAN Node-B Gateway, reducing
the number of interfaces linked directly with the core network.
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