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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 [email protected]