E-UTRAN

eUTRAN Overview

eUTRAN Features 

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Peak download rates  –

299.6 Mbit/s for 4x4 antennas with 20 MHz of spectrum

 –

150.8 Mbit/s for 2x2 antennas with 20 MHz of spectrum.

Peak upload rates  –

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75.4 Mbit/s for a 20 MHz channel (closer to 50Mbps)

Low data transfer latencies (sub-5ms latency for s mall IP packets in optimal conditions), lower latencies for handover and connection setup time.

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Support for terminals moving at up to 350 km/h or 500 km/h depending on the frequency band.

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Support for both FDD and TDD

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Support for all frequency bands currently used by IMT systems.

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Flexible bandwidth: 1.4 MHz, 3 MHz, 5 MHz, 15 MHz and 20 MHz are standardized.

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Increased spectral efficiency at 2-5 times more than in 3GPP (HSPA) release 6

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Support of cell sizes from tens of meters of radius (femto and picocells) up to over 100 km radius macrocells

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Simplified architecture: The network side of EUTRAN is composed only by the enodeBs

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Support for inter-operation with other systems (e.g. GSM, GPRS, UMTS...)

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Packet switched radio interface.

LTE Network and Interfaces Internet SGi

UMTS/GERAN

S3,S4

EPC S2

S1

eUTRAN

WLAN

eUTRAN Architecture User Data

Signalling and Control

PGW

S11

SGW

MME

S1_U

S1_MME

eNB

eNB

X2

NAS Signalling Signalling and Control

NAS

MME

eMM eSM

NAS  – Non Access Stratum • • • •

MME to UE Control Mobility Management Session Control e N B i s T r a n s p a r en t

S1_MME

eNB

eNB

NAS UE

eMM eSM

S1 Signalling Signalling and Control

S1AP

MME

S1AP  – S1 Application Protocol • • • • •

MME  – e N B C o n t r o l Initial Context Trans fer Handover Paging S1 Management

S1_MME

S1AP eNB

eNB

UE

S1 Procedures

Radio Signalling RRC  – Radio Resource Control •

MME

• • • • • •

eNB  – U E C o n t r o l Radio Channel Setup/Control Handover Radio Bearer Control Paging System Information Broadcast Transfer of NAS

S1_MME

RRC eNB

eNB

RRC UE

User Data  – S1_U User Data

PGW

User Plan Data • • •

Transfer of IP Packets QoS Controlled EPS Bearer

SGW

S1_U

eNB

eNB

UE

User Data in the eUTRAN

MME NAS (eSM) S1AP

GTP-C

RRC

Radio Bearer

SGW S1 Bearer

UE

EPS Bearer

S5 Bearer

X2 Interface User Data

Signalling and Control

PGW

S11

SGW

MME

S1_U

S1_MME

eNB

eNB

X2 interface • •

X2

Handover I n t e r f er e n c e C o o r d i n a t i o n

X2 Procedures

S1, X2 Network User Data

Signalling and Control

PGW

S11

MME

SGW

eNB

eNB

S1 and X2  – Provisioned through a L3/L2 Network L3 is IP at entry and exit points L2 could be MPLS or Ethernet based • •

Some eUTRAN Procedures

1

EPS Attach

3

Default Bearer Establishment

4

IMS Registration

6

EUTRAN Tracking Areas MME

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Location Updating  At initial registration When the UE move to a different TA

MME Store TA in the MM Context

Multiple Tracking Areas MME

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Location Updating  At initial registration When the UE move to a different TA

MME Store TA in the MM Context Multiple TA can be registered •

7

Tracking Area Update

8

Idle Mode and Paging

12

Procedures Whilst in Connected Mode

13

X2 Based Handover

13

X2 Based Handover

Any Questions?