The document discusses the evolution of UTRAN (UMTS Terrestrial Radio Access Network) to an all-IP architecture. UTRAN originally contained base stations (Node Bs) and Radio Network Controllers (RNCs) connected via various interfaces. It is evolving to the E-UTRAN architecture in LTE, which uses eNodeBs directly connected to the Evolved Packet Core via the S1 interface, removing the need for RNCs. This evolution allows for better support of IP-based services and improved capabilities like direct communication between eNodeBs.

1. UTRAN EVOLUTION TO ALL IP
Presenting by…
SHANTANU KRISHNA
Reg. no : 1791210007
Branch : TCN

2. Contents
• Introduction
• Architecture
• E-UTRAN
• Wireless all –IP subsystems
• Principal
• Conclusion

3. UMTS Terrestrial Radio Access Network
• UTRAN is a collective term for the Node B's (Node B
is a term used in UMTS(Universal Mobile
Telecommunications System) equivalent to the BTS)
and Radio Network Controllers (RNCs is responsible
for controlling the Node B’s that are connected to it)
which make up the UMTS radio access network.
• This communications network, commonly referred to
as 3G (for 3rd Generation Wireless Mobile
Communication Technology), can carry many traffic
types from real-time Circuit Switched to IP based
Packet Switched.
• The UTRAN allows connectivity between the UE (user
equipment) and the core network.

4. UTRAN architecture

5. • The UTRAN contains the base stations, which are
called Node Bs, & Radio Network Controllers (RNC).
• The RNC provides control functionalities for one or
more Node Bs. A Node B and an RNC can be the
same device, although typical implementations have
a separate RNC located in a central office serving
multiple Node Bs.
• The RNC and its corresponding Node Bs are called
the Radio Network Subsystem (RNS).
• There can be more than one RNS present in a
UTRAN.

6. • There are four interfaces connecting the UTRAN
internally or externally to other functional entities:
Iu, Uu, Iub and Iur.
• The Iu interface is an external interface that connects
the RNC to the Core Network (CN).
• The Uu is also external, connecting the Node B with
the User Equipment (UE).
• The Iub is an internal interface connecting the RNC
with the Node B.
• And at last there is the Iur interface which is an
internal interface most of the time, but can,
exceptionally be an external interface too for some
network architectures. The Iur connects two RNCs
with each other.

7. UMTS Terrestrial Radio Access Network,
Overview
 Two Distinct Elements :
Base Stations (Node B)
Radio Network Controllers (RNC)
 1 RNC and 1+ Node Bs are group
together to form a Radio Network
Sub-system (RNS)
 Handles all Radio-Related
Functionality
 Soft Handover
 Hard handovers
 Radio Resources
Management Algorithms

8. The evolution of UTRAN
(Serving, Gatway GPRS Support Node)
eNB eNB
eNB
MME / S-GW / P-GW MME / S-GW / P-GW
X2
X2 X2S1
S1
S1
S1
NB NB NB NB
RNC RNC
SGSN
GGSN
UTRAN (UMTS) EPC and E-UTRAN (LTE)
E-UTRAN
EPC

9. System architecture of LTE
• eNB provides E-UTRA U-Plane and C-Plane protocol
terminations towards the UE.
• X2 connects eNBs as mesh network, enabling direct
communication between the elements and
eliminating the need to tunnel data back and forth
through a (RNC).
• S1 connects E-UTRAN to EPC (Evolved Packet Core)
(eNBs are connected to MME (Mobility Management
Entity) and S-GW elements through a “many-to-
many” relationship).

10. Wireless all –IP subsystems

11. Principal Functions of UTRAN
• Manage radio resources;
• Process radio signaling;
• Terminate radio access bearers;
• Perform call setup and tear-down;
• Process user voice and data traffic;
• Conduct power control

12. Conclusion
• Thus I conclude that UTRAN Provide
operations, administration, management and
Perform soft, and (UMTS and GSM voice or
GSM GPRS) hard handovers.
• It’s a long term evolution which transfer user
voice and data with high data rate.
• Its highly capacitive.
• Its always Support-on packet data.