UTRAN EVOLUTION TO ALL IP

Presenting by…SHANTANU KRISHNAReg. no : 1791210007Branch : TCN

Contents

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

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.

UTRAN architecture

• 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.

• 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.

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

The evolution of UTRAN(Serving, Gatway GPRS Support Node)

eNB eNB

eNB

MME / S-GW / P-GW MME / S-GW / P-GW

X2

X2 X2

S1 S1

S1

S1

NB NB NB NB

RNC RNC

SGSN

GGSN

UTRAN (UMTS) EPC and E-UTRAN (LTE)

E-UTRAN

EPC

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).

Wireless all –IP subsystems

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

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.