RA4155-02A RL15TD eNB HOT – LTE/EPC overview1 © Nokia Siemens Networks

LTE/EPC OvervieweNB Hands-on Training for Trial (RL15TD)

RA4155-02A RL15TD eNB HOT – LTE/EPC overview2 © Nokia Siemens Networks

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RA4155-02A RL15TD eNB HOT – LTE/EPC overview4 © Nokia Siemens Networks

Content

RA4155-02A RL15TD eNB HOT – LTE/EPC overview5 © Nokia Siemens Networks

data rates

< 1 Gbps

mobility

GSM/IS95

AMPS

WCDMA/cdma2000HSPA LTE

802.11a/b/g802.11a/b/g

< 100 Mbps< 50 Mbps< 10 Mbps< 1 Mbps< 200 kbps

time

2010200520001990

HIGH

LOW

History and Future of Wireless

1G

2G

3G 3G Enhacements 3G Evolution

802.11 802.11nWLAN Family

WiMAX Family

802.16e

Mobile WiMAX

802.16e

Mobile WiMAX802.16a/d

Fixed WiMAX

802.16a/d

Fixed WiMAX

RA4155-02A RL15TD eNB HOT – LTE/EPC overview6 © Nokia Siemens Networks

NSN Network Architecture Evolution

Node B RNC SGSN GGSN

Internet

3GPP Rel 6 / HSPA

Direct tunnel

3GPP Rel 7 / HSPA

Internet

Node B RNC

SGSN

GGSN

Direct tunnel

3GPP Rel 7 / Internet HSPA

Internet

Node B

SGSN

GGSN

Node B

(RNC Funct.)

Direct tunnel

3GPP Rel 8 / LTE

Internet

Evolved Node B

MME

SAE GW

RA4155-02A RL15TD eNB HOT – LTE/EPC overview7 © Nokia Siemens Networks

LTE/EPS Network Architecture Subsystems

• LTE/EPS architecture is driven by the goal to optimize the system for packet data transfer.

• No circuit switched components

• New approach in the inter-connection between radio access network and core network (S1 interface)

•The EPS architecture is made up of an

EPC (Packet Core Network, also referred

as SAE) and an eUTRAN Radio Access

Network (also referred as LTE)

•The EPC provides access to external

packet IP networks and performs a number

of CN related functions (e.g. QoS, security,

mobility and terminal context management)

for idle (camped) and active terminals

•The eUTRAN performs all radio interface

related functions

IMS/PDN

EPC

eUTRAN

LTE-UE

EPS

RA4155-02A RL15TD eNB HOT – LTE/EPC overview8 © Nokia Siemens Networks

Basic Network Architecture

MME

SGW

IMS

Internet

Companyintranet

SAE-GW

LTE-UE eNB

eNB

HSS

PCRF

PGW

X2 S1-MME

S1-U S5/S8

S11Gx

Rx+

SGi

S6a

Uu

eUTRAN EPC

Control plane path

User data path

RA4155-02A RL15TD eNB HOT – LTE/EPC overview9 © Nokia Siemens Networks

LTE/EPS Mobility Areas

Two areas are defined for handling of mobility in LTE/EPS:

RA4155-02A RL15TD eNB HOT – LTE/EPC overview10 © Nokia Siemens Networks

Tracking Areas

S-eNBTAI3

TAI3TAI3

TAI3

TAI3TAI3

TAI3

MME

HSS

eNB

TAI2

TAI2TAI2

TAI2

TAI2

TAI2

TAI2

TAI2

TAI1

TAI1TAI1

TAI1

TAI1eNB 1 2

MME

3

Cell Identity

Tracking Area

RA4155-02A RL15TD eNB HOT – LTE/EPC overview11 © Nokia Siemens Networks

LTE Mobility & Connection States

RA4155-02A RL15TD eNB HOT – LTE/EPC overview12 © Nokia Siemens Networks

LTE/EPS Bearer: Identity & Architecture

cell

S1-ULTE-Uu S5/S8

PDN

SGieNB Serving

GatewayPDN

Gateway

E-UTRAN EPC PDN

•An EPS bearer identity uniquely identifies an EPS bearer for one UE. The EPS Bearer Identity

is allocated by the MME.

•LTE/EPS Bearer spans the complete network, from UE over EUTRAN and EPC up to the

connector of the external PDN.

•The SAE bearer is associated with a quality of service (QoS) usually expressed by a label or

QoS Class Identifier (QCI)

LTE-UE

End-to-End Service

EPS Bearer External Bearer

Radio Bearer S1 Bearer S5/S8 Bearer

RA4155-02A RL15TD eNB HOT – LTE/EPC overview13 © Nokia Siemens Networks

The Default Bearer Concept

•Each UE that is attached to the LTE network has at least one bearer available, that is called the default bearer.

•Its goal is to provide continuous IP connectivity towards the EPC (“always-on” concept)

•From the QoS point of view, the default bearer is normally a quite basic bearer

•If an specific service requires more stringent QoS attributes, then a dedicated bearer should be established.

cell

S1-U

UE

S5PDN

Sgi

eNB

Serving

Gateway

PDN

Gateway

Default EPS Bearer

MME

S1-MME

S11

RA4155-02A RL15TD eNB HOT – LTE/EPC overview14 © Nokia Siemens Networks

EPS Bearer QoS Attributes

EPS Bearer QoS Parameters

(To be defined per Bearer)

Default Bearer/Dedicated Bearer

GBR/N-GBR

MBR

UL/DL-TFT

QCI

ARP

EPS Bearer QoS Parameters

(To be defined per User) AMBR

RA4155-02A RL15TD eNB HOT – LTE/EPC overview15 © Nokia Siemens Networks

QoS Class Identifier (QCI) Table in 3GPP

GBR1

Guarantee Delay budget Loss rate ApplicationQCI

GBR

100 ms 1e-2 VoIP

2

GBR

150 ms 1e-3 Video call

3

GBR

300 ms 1e-6 Streaming

4

Non-GBR 100 ms 1e-6 IMS signalling5

Non-GBR 100 ms 1e-3 Interactive gaming6

Non-GBR 300 ms 1e-6TCP protocols : browsing, email, file download

7

Non-GBR 300 ms 1e-68

Non-GBR 300 ms 1e-69

Priority

2

4

5

1

7

6

8

9

50 ms 1e-3 Real time gaming3

RA4155-02A RL15TD eNB HOT – LTE/EPC overview16 © Nokia Siemens Networks

EMM & ECM States Transitions

EMM_Deregistered

ECM_Idle

Power On

Registration (Attach)

EMM_Registered

ECM_Connected

• Allocate C-RNTI, S_TMSI

• Allocate IP addresses

• Authentication

• Establish security context

• Release RRC connection

• Release C-RNTI

• Configure DRX for paging

EMM_Registered

ECM_Idle

Release due to

Inactivity

•Establish RRC Connection

•Allocate C-RNTI

New TrafficDeregistration (Detach)

Change PLMN

• Release C-RNTI, S-TMSI

• Release IP addresses

Timeout of Periodic TA

Update

• Release S-TMSI

• Release IP addresses

RA4155-02A RL15TD eNB HOT – LTE/EPC overview17 © Nokia Siemens Networks

E-UTRAN Functionalities 3GPP TS 36.401

Evolved

Node B

(eNB)cell

LTE-Uu

LTE-UE

RA4155-02A RL15TD eNB HOT – LTE/EPC overview18 © Nokia Siemens Networks

NSN LTE / EPC Portfolio

RA4155-02A RL15TD eNB HOT – LTE/EPC overview19 © Nokia Siemens Networks

Flexi Multiradio BTS LTE

Remote RF Head Solution for RL15TD:

• System module

• RRH for RF function, one per sector/cell

• Feederless & distributedRemote RF Module

System Module

OBSAI RP3-01 optical

Antenna

GPS Receiver

RA4155-02A RL15TD eNB HOT – LTE/EPC overview20 © Nokia Siemens Networks

FlexiBTS Product Differences between FDD&TDD

Remote Radio Head2 Path or8 path (beamforming)

System Module

OBSAI RP3-01 optical

Antenna

GPS Receiver

FCMDTransport Block

FSPC BB cardFSPC BB cardFSPC BB card

RF feeder

Antenna

GPS Receiver

System Module

RF Module

FDD/RL25TD: RF Module Solution

Near the System Module

TDD: Remote Radio Head Solution

Near the Antenna (RL05/15)

RA4155-02A RL15TD eNB HOT – LTE/EPC overview21 © Nokia Siemens Networks

Flexi Network Server

RA4155-02A RL15TD eNB HOT – LTE/EPC overview22 © Nokia Siemens Networks

Flexi Network Gateway