1. Rajeev Bansal DGM (GSM & 3G), ALTTC, Ghaziabad
BSNL 3G Roll Out
Rajeev Bansal
DGM (GSM & 3G), ALTTC, Ghaziabad

2. 3GPP Network Reference ModelIu AN UE
BSC
BTS Um
SIM MT
Abis A
BSS
RNS
UTRAN
Note:
Not all interfaces
are
shown and named F Gf Gr Gn + H Iu AN UE
BSC
BTS Um
SIM MT
Abis A
BSS CN CN
External
External
Networks
Networks
MSC-S
MSC
SCF
SCF
MSC
MSC
SCF
SCF E, E, G G
GMSC
GMSC
GMSC
GMSC
MSC
MGW
MSC
MSC D D
SMS
SMS - - SC SC H
HLR
HLR
AUC
AUC
HLR
HLR
AUC
AUC
ISDN
ISDN F
PSTN
PSTN
SMS
SMS - -
PSPDN
PSPDN
SMS
SMS - -
EIR
EIR
EIR
EIR
GMSC
GMSC
CSPDN
CSPDN Gr
GMSC
GMSC
PDN:
PDN:
RNS Gb Gb
SMS
SMS - - - -
Intranet
Intranet
USIM
USIM Cu Cu ME ME Uu Uu
Iub
Iub Gf
SMS
SMS - -
USIM
USIM ME ME BS BS
IWMSC
IWMSC - -
Extranet
Extranet
RNC
RNC
IWMSC
IWMSC - -
Internet
Internet Iu Iu
SGSN
SGSN
SGSN
SGSN Gn +
GGSN
GGSN
Iur
Iur
GGSN
GGSN Gd Gd , ,
RNS Gp Gp , , Cu Cu Uu Uu
Iub
Iub Gn Gn + +
USIM
USIM ME ME
USIM
USIM ME ME BS BS
RNC
RNC
SGSN
SGSN
SGSN
SGSN
Note:
Not all interfaces
UTRAN
are
shown and named

3. Primary Sites Vs Secondary Sites
Primary Site is the highest level site in the core network.
– Contains nodes, both controlling and switching nodes for CS and
PS respectively as well as BSC access nodes.
– MSC-S, M-MGw, SGSN, BSC nodes.
Secondary Site are sites with local switching capability and RAN
access.
– M-MGw and BSC nodes.

4. Primary Sites Vs Secondary Sites

5. Monolithic vs Layered Architecture

6. Monolithic vs Layered Architecture
MSC
MSC-S
MGW

7. Migration from Monolithic to Layered architecture
MSC
Server
MSC
(Monolithic)
GCP / SIGTRAN
MGW
Call Control
Bearer

8. Design Principle
Control Signaling between MSC-S and M-MGw is using SS7
over IP (SIGTRAN)
BSC is connected to one M-MGw only
Each monolithic MSC is connected to SGw over TDM
Signaling between Monolithic MSC and MSC-S will be via SGw.

9. Design Principle
BICC
MSC-S
MSC-S
SIGTRAN
MGW
TDM
MSC
Monolithic MSC

10. Transport Design Design Criteria:
􀂃 Up to 6 Node-Bs grouped into one cluster of a Sub-hub
􀂃 Up to 4 Sub-Hub clusters grouped into 1 hub.
􀂃 STM-1 from Hub/Sub-Hub to RNC through BSNL media
Interfaces:
􀂃 End node-B: E1 interface.
􀂃 Sub-Hub: E1 interface / STM-1 interface.
􀂃 Hub: STM-1 interface.

11. Hub- Sub-HUB Architecture

12. Requirement from BSNL 3E1 for Each Node B sites.
STM-1 between RNC and Hub RBS site
STM-1 between Hub RBS and Sub Hub RBS sites as
STM-1 between RNC and Core network.
Pool of IPs for O&M Purposes and GTPU Links (RNC to SGSN)
– 16 IP per node-B
– 64 IPs per RNC
128 IPs for OSS
Separate IMSI series for USIM
STM from Every Circle to ViG

13. Video Gateway (ViG)
􀂃 Video Gateway (ViG) interconnects WCDMA core network on one side and an IP network on other. It supports, IP-based Video Messaging systems and Multiparty Conferencing Systems 􀂃
Proposed ViG offers following services:
– Mobile to Mobile Video Calls
– Mobile to IP client (PC) video calls.
– Circuit Switched Streaming
– Multi-party Video Conferencing

14. ViG: Basic Connectivity
• Used for Mobile to PC and PC to Mobile Video Calls
• Video Conferencing

15. Key Services being offered
􀂃 Mobile to Mobile Video Call
􀂃 Mobile Broadband (High Speed Data)
􀂃 Video Streaming (Clips/Movies etc.)
􀂃 Mobile TV (Live TV Channels)

16. Thank You !!!