GSM TOWARDS LTE NETWORKS

Lecture # 5

MOBILE TRAFFIC VOICE AND DATA

Source: Internal EricssonDVB-H, Mobile WiMax, M2M and WiFi traffic not includedThis slide contains forward looking statements

Subscriber traffic in mobile access networks

07-14

0

5

10

15

20

25

30

2007 2008 2009 2010 2011 2012 2013 2014

Yea

rly E

xaby

tes

Data

Voice

0

5

10

15

20

25

30

2007 2008 2009 2010 2011 2012 2013 2014

Yea

rly E

xaby

tes

Data

Voice

Exabyte = Giga Giga Byte

THE 3G VISION

Global Seamless Roaming Common Worldwide Spectrum Multiple Radio Environments Wide Range of Services -Voice & Data Equally Flexible, Spectrum Efficient Technologies Wireless - Wireline Integration Enhanced Security and Performance Wireline Services and Quality Levels Rapid Introduction of New Technology

3G VISION - APPLICATION Application

Multimedia Message Service (MMS) Email Video phone Video streaming Any service from the Internet

3G VAS APPLICATIONS

Video SMS Video Portal Mobile TV Video IVR Video CRBT Mobile Video Marketing YouTube upload Video conferencing Video greeting Dial TV service 3G Music Station with full track song download Video Contact Center

2G TOWARDS 3G

Higher data bandwidth requirement

Anticipated subscriber demand for Audio/Video streaming Other multimedia services Collaborative services Location services

3G - PRINCIPLE REQUIREMENT

Support for voice quality comparable with fixed line networks

Support for both circuit-switched and packet-switched data services

Support for greater capacity and improved spectrum efficiency

3G–PRINCIPAL REQUIREMENT

A data rate of 144 kb/s for users moving quickly e.g. moving vehicles

A data rate of 384 kb/s for pedestrians

A data rate of 2 Mb/s in a low mobility or office environment.

Note how a network using GPRS and EDGE meets most of these criteria!

Example: 3G SERVICES (UMTS) Universal Mobile Telephone System (UMTS)

Four QoS classes of services Conversational Class

Voice, video telephony,video gaming Streaming Class

multimedia, video on demand, webcast Interactive Class

WWW browsing, database access, online gaming Background Class

email, SMS, file downloading

2.5 GPRS VOICE / data ARCHITECTURE

Voice Calls Path

Data Calls Path

Packet Data14.4 Kp/s

3G NETWORK

GGSN

IP networks

SGSN

IuGb

2G 3G

BSC

BTS

RNC

Node B

HLR/HSS

Gr

Gi

LTE/SAE Architecture

Iur

Only PS Domain shown

Gn Gn

HSPA (High Speed Packet Access)

GGSN

IP networks

SGSN

Iu CPGb

2G 3G

BSC

BTS

RNC

Node B

HLR/HSS

PCRF

Iu UP

Gr

Gi

LTE/SAE Architecture

Iur

Gx

Only PS Domain shown

Gn

Optimizing the 3G/HSPA payload plane for Broadband traffic

Release 7 ”Direct Tunnel”

STEPS TOWARDS 3G

1- Backbone Roll Out (Packet Network)

All the backend traffic transfer on IP (Packets) /Passport/ATM/MPBN

2- Data Network

3- Core Network

4- RAN Network

1-BACKBONE ROLL OUT (Packet Network) Migration Steps

2-DATA NETWORK MIGRATION

2nd GENERATION NETWORK

3rd GENERATION NETWORK

2G & 3G NETWORK

TOWARDS IP NETWORK

3-CORE NETWORK MIGRATION

Classic MSC(Control and Switching)

Classical MSC Architecture(old name: Non-Layered Mobile Core Network/

’Monolitic’ Architecture)

TDM

MSC

MSC

MSC MSC

MSC MSC

MSC Server(Control)

Mobile Media Gateway(Switching)

Mobile Softswitch Solution (old name: Layered Mobile Core Network

Architecture)

IP/ATM/TDM

Control Layer

MSC-S

MGw

MSC-S

MGw

MGw MGw

MGw MGw

INCREMENTAL MIGRATION In Pakistan, Most operators have incrementally

Migrated.

Two strategies have been adapted GPRS adapted by Warid Telecom. EDGE adapted by Ufone.

MOBILE SOFT SWITCH SOLUTION FOR 3G CORE NETWORK One of the most efficient way to upgrade for

3G core networks.

Layered architecture for ease

MSS is only for Mobile core networks

LAYERED ARCHITECTURE

The benefit of layered architecture is from research and development purpose.

In communication there are two main recourses i.e. controlling and connectivity.

MSS LAYERS

1. Control Layer

2. Connectivity Laye

3. Application Layer

CONTROL LAYER This layer is refer to the logical layer as it

performs logical operations of the MSS

this node provides the analysis and control functions required for circuit switched traffic and using standardized signaling

controlling the allocation of required resources in the connectivity layer

CONNECTIVITY LAYER

This layer is based on ATM (Asynchronous Transfer Mode) and IP protocols.

Providing end-to-end connection throughout the core network.

This layer provide standard interfaces for the connectivity with other legace networks.

APPLICATION LAYER

In this layer all the application are added and managed.

Like if Warid want to provide CBRT (Caller Back Ring Tone) service then it add server that provide this service to the user in the application layer.

Recourses of such servers are controlled by MSC-S.

MSS ARCHITECTURE

MSS NODES

1. MSC-S (Mobile Switching Server)

2. M-MGW (Mobile Media Gateway)

MSC-SERVER

MSC-S is the control layer device of the 3G network.

It contains all call and control service logic such as:

ѣ Charging analysis

ѣ Bearer selection

ѣ Route analysis

ѣ Media Gate way selection

MSC-SERVER

It provides efficient and centralized control of the distributed switching provided by the Mobile Media Gateway (M-MGw), ensuring flexible, cost-effective network design, and a smooth evolution to an all-IP core network.

MSC-SERVER

MSC-S

Data Base nodes

Other MSC-S

M-MGW

Radio Sites

M-MGW

M-MGW is the connectivity layer device. M-MGW connects the MSS core network with

the external networks such as WCDMA and GSM radio access networks, PSTN networks, PABXs, IMS/VoIP network, or other mobile networks.

This node controlled by MSC-S.

SIGNALING AND PROTOCOLS

PSTN/ISDN/PLMN

BICC / MAP

BSSAP

ISUPSIP

GCP GCP

RANAP

MAP

MAP

INTERFACE & PROTOCOLS

PSTN/ISDN/PLMN

Nb

A

Lu CS

Control PlaneUser Plane

Nc

Mc Mc

POI

3G CALL SETUP

Call Setup Scenario : Subscriber “A” is a calling party from PTML and Subscriber “B” is called party that is related to PSTN

PSTN/ISDN/PLMN

IP

1. SETUP

PSTN/ISDN/PLMN

IP

2. RNC send SETUP message to MSC-S

PSTN/ISDN/PLMN

IP

3. SEIZE RESOURCES

PSTN/ISDN/PLMN

IP

4. M-MGW reply by ACK message

PSTN/ISDN/PLMN

IP

5. MSC-S inform RNC that call is in progress by CALL PROCESSED message

PSTN/ISDN/PLMN

IP

6. MSC-S send ASSIGNMENT message

PSTN/ISDN/PLMN

IP

7. RNC send ERQ message to selected M-MGW

PSTN/ISDN/PLMN

IP

8. M-MGW setup virtual connection with RNC and reply by ECF message

PSTN/ISDN/PLMN

IP

9. RNC send ASSIGNMENT COMPLETE message

PSTN/ISDN/PLMN

IP

10.MSC-S 1 send IAM message to MSC-S 2

PSTN/ISDN/PLMN

IP

11.T-Server send SEIZE RESOURCE message to selected M-MGW

PSTN/ISDN/PLMN

IP

12. M-MGW send reply by ACK

PSTN/ISDN/PLMN

IP

13. T-Server forward IAM to terminating end i.e. PSTN

PSTN/ISDN/PLMN

IP

14. PSTN reply by ACM

PSTN/ISDN/PLMN

IP

15. T-Server forward ACM to MSC-S

PSTN/ISDN/PLMN

IP

16. MSC-S order M-MGW to through connection back to party “A”

PSTN/ISDN/PLMN

IP

17. MSC-S alert party “A” by sending ring back tone and party “B” by ring tone

PSTN/ISDN/PLMN

IP

18. As “B” party answer the call and send ANM to T-Server

PSTN/ISDN/PLMN

IP

19. T-Server inform ANM to MSC-S

PSTN/ISDN/PLMN

IP

20. MSC-S order to through both way speech path

PSTN/ISDN/PLMN

IP

21. MSC-S order to RNC to connect call to traffic channel by CONNECT message

PSTN/ISDN/PLMN

IP

22. RNC send ACK

PSTN/ISDN/PLMN

IP

23. The UMTS call path has been established

GSM Toward LTE Networks

LTE/SAE Architecture Product dimension

PDN GWServing GW

MME

S1-MME S1-U

LTE

IP networks

eNodeB

SGSN

Iu CPGb

2G 3G

S3

BSC

BTS

RNC

Node B

HLR/HSS

PCRF

Iu UP

S11

Gr

S10

S6a

SGi

LTE/SAE Architecture

X2

Iur

S7

Non-3GPP access

S2a/b

S4PDN GW

Serving GW

”Gateway”

MMESGSN

”Mobility Server”

PCRF

HLR/HSS

”HLR/HSS”

EPC

eNode B

RBS

OSS

PA/DU Core & IMS

PA/DU Radio

Lecture link

www.lte.yolasite.com www.lte.yolasite.com