Next Generation Network (NGN) &

Application in Bangladesh

Prepared & Presented by

Md. Shahriar Rashid

at10th Asia Pacific Telecommunication and ICT Development Forum

on 20th August 2013 at Sonargoan Hotel Dhaka

What is NGN?

Next Generation Network (NGN) Packet-based network. Able to provide telecommunication & broadband services. Able to support generalize mobility service. Able to support QoS-enabled transport technologies. Last but not least , it is a network where service-related functions are independent from underlying transport- related technologies.

What NGN Does? NGN separates transport layers from control layers. Introduce layer architecture.

MONOLITHIC SWITCH ARCHITECTURE

NGN ARCHITECTUREOpen, standardised interfaces

Media Gateway Controller

Media Gateway

TDM Switch

Voice, Video & Data are in same transport layer. Simplify service creation environments. -> Easy operation. Single network management layer. -> Simplify the operation. Services are independent to transport layer. -> Easy deployment. Maximize the data network capacity. -> CAPEX optimization. Open standards creates vendor competition. -> Reduce price. Future proof solution for introducing IMS and FMC. -> Ensure TCO. Reduce the OPEX and CAPEX.

NGN Benefits

Generic Mobile Network NGN Architecture

IP connection with SIGTRAN association

Legend

TDM connection withSS7 signaling

MSC 1 MSC 2 MSC 3

MPBN/MPLS

IP Network

MGW 2MGW 1 MGW 3 MGW 4

ICX/IGW ICX/IGW BSC 01 BSC02 BSC 03 BSC 04

HLR

FNR

SGSN

GGSN

FW

All VAS

IIGIIG

I N

Generic IP Backbone Architecture

BOGRA

KHULNA

SYLHET

CHITTAGONG

DHAKA

DHAKA

Benefits: Service availability high. Day time maintenance. No single point of failure. Reduce O&M cost.

Generic IP Backbone used for

Same IP backbone used for: Circuit switch voice traffic. Circuit switch signaling traffic. GPRS network/service. IT Traffic. O&M Traffic. Charging system (IN) traffic.

Benefits: Easy O&M Technology neutral core backbone CAPEX and OPEX savings.

Same transport layer for different services

IP backboneMPLS

CS Voice

CS

Signaling

GPRS

Gb/IP

ITTraffic

O&M

Traffi

cINTraffic

IP Backbone Redundancy in NGN

Benefits: High availability & increased robustness.

Ethernet board

GbGb

Ethernet board

GbGb

Primary link

Secondary link

M-MGw Ethernet Switch

Router

Ethernet Switch

Router

As all service are providing through same IP backbone,

Backbone Redundancy is High Priority.

X

Traditional Transmission Network

Result: More CAPEX Involvement, Inefficient transmission usages.

Example: Legacy/Traditional Local Switching

Point of Interconnect(POI)

Call under same BSC has to carry over to MSC by costly TDM based transmission. 2 long distance circuit is required for per intra BSC calls.

Call under same area PSTN/PLMN has to carry over to MSC by costly TDM based transmission.

BSC

MSCBSC is far from MSC

Point of Interconnect(POI)

MSC-SBSC M-MGw

Benefits: CAPEX saving, CAPEX maximization

Example: NGN Local Switching

Transmission Efficieny in NGN

BSC is far from MSC-S but MGW is close

Call under same BSC does not need to carry over to MSC.Saving 2 long distance circuit for per intra BSC calls.

Call under same area PSTN/PLMN does not need to carry over to MSC.

Distance between Dhaka and Bogra is 200KM.

Bogra BSC connected with Bogra MGW controlling from Dhaka MSC-S. Savings transmission bandwidth for intra BSC/MGW calls. Savings 66% transmission bandwidth for long distance calls.

Benefits: CAPEX saving. CAPEX maximization. Bandwidth utilization.

MSC X

(DHAKA)

MPBN IP Network

MGW Y

(BOGRA)

BSC

IP connection with SIGTRAN association

Legend

TDM connection with SS7 links

Example: Transmission Efficieny in NGN

ICX

ICX/IGW

MGW Z

(DHAKA)

Advantage of Soft Switch with virtual MGw

1Virtual MGws

2 ..32 1Virtual MGws

2 ..32 1Virtual MGws

2 ..32

BSC or RNC

M-MGw node M-MGw node M-MGw node

BSC Load Sharing in NGN

Benefits: Service availability high. Day time maintenance. No single point of failure. Reduce O&M cost.

VMGW(Internal Network)

VMGw(National Network)

BSS

POIMSC-S Y

MSC-S X

KHULNA MGW

Core Capacity Optimization in NGN Advantage of separate control and connectivity layer

Distance between Dhaka and Khulna is 250KM.

Khulna MGW is controlling by 2 MSC-S from Dhaka.

BSC is controlling by MSC-S X. POI is controlling by MSC-S Y.

Benefits: Utilization of MSC-S’s extra capacity. Better resource utilization. Service/capacity ensure during festivals like EID. CAPEX maximization.

Signaling over IP

IP Network

HLR HLRHLR HLR

HLR HLRHLR HLR

STP

STP STPSTP

Traditional Signaling

Signaling Architecture in NGN Traditional signaling has complex physical & logical configuration. Signaling over IP (Sigtran) has simple

configuration (IP address only). Separate STP or Signaling Gateway (SG) is not required in this architecture.

Benefits: CAPEX saving, no investment for STP & SG. Better utilization for transmission capacity. Signaling transmission can shared by PS and O&M traffic. Easy O&M means reduce OPEX.

NGN status at Bangladesh

Bangladesh market has:

5 GSM operators running on NGN architecture. 26 ICX operators running on NGN architecture. 29 IGW operators running on NGN architecture.

All ANS (mobile operator) connected with ICX/IGW by TDM

All ICX connected with IGW by TDM

IGW connected with International carrier most of the cases by IP

NGN advancement in Bangladesh in future

3G service adaptation on NGN by this year

LTE service adaptation on NGN in near future

IMS service adaptation in near future

Typical wish to connect all ANS to ICX/IGW by IP transport

Benefits: Flexible use of investment. Ensure TCO.

WCDMA

ATM or IP Iu I/f

TDM A I/fGSM

GCPRANAP

BSSAP

RNC

M-MGw

MSC-S

BSC

3G network deploymentNGN allows simultaneous access for WCDMA & GSM

All GSM operators have soft switch MSC. All GSM operators have IP backbone. Easy to adopt 3G core with GSM core network.

Requirements: 3G license from regulator. RNC, lu over IP. NodeB, lub over ATM or IP.

IMS deployment

One of the requirement for IMS is service independent transport layer. MPBN transport (IP) layer is service independent.

Benefits: Time-to-market will be reduced. Ensure TCO.

Defined in 3GPP R5

T H A N K Y O Ushahriar19@gmail.com