1. GPRS/EDGE Implementation

2. Topics to be discussed……
GPRS Terminology
APNs for BSNL
GPRS Services offered by BSNL
Handset Settings
Default Settings
Connecting PC with Handset
EDGE functionality

3. GPRS Terminology GPRS- General Packet Radio System
EDGE- Enhanced Data Rates for Global Evolution
BTS- Base Transceiver Station
BSC- Base Station Controller
HLR- Home Location Register
SGSN- Serving GPRS Support Node
GGSN- Gateway GPRS Support Node
DNS- Domain Name Server
APN- Access Point Name
PDN- Packet Data Network
PDP- Packet Data Protocol

4. GPRS Terminology MMS- Multi-Media Messaging Service
WAP - Wireless Access Protocol

5. ( GSM Architecture BSC A Interface A-bis interface OSS PSTN ISDN Data
HLR
PSTN
ISDN B T S
MSC VLR
Data
Networks B T S
BSC
A Interface
A-bis interface
MSC VLR
Air interface

6. GPRS Network Overview SGSN GGSN SMS-GMSC SMS-IWMSC BTS BSC MSC/VLR HLRGd
(MAP)
Abis A
BTS
BSC
MSC/VLR
(MAP)
HLR IP
Network Gb Gs
Gr (MAP)
Gi (IP)
SGSN
GGSN
Other PLMN Gn Gn
Gb - Interface between SGSN and BSC (Frame Relay)
Gi - Reference point between GPRS and external packet data network
Gs - Interface between SGSN and MSC
Gr - Interface between SGSN and HLR
Gd - Interface between SGSN and SMSC
Gn - Interface between two GSN within
the same PLMN
Gp - Interface between two GSN in
different PLMN
Backbone Network
Gp (IP)
11/30/2018

7. GPRS Traffic
The messages that are sent between various components of the GPRS network are collectively referred to as GPRS Traffic.
A set of Traffic management procedures is required to manage this Traffic.

8. GPRS Traffic
Procedures that handle mobility of user are called GPRS MobilityManagement(GMM).
Procedures that handle user connection to external networks are called Session Management(SM).

9. GPRS Traffic
There are two phases in connecting a GPRS terminal to the network:
- Connection to the GPRS(SGSN) network:
GPRS attach
Connection to the external network:
PDP context activation

10. GPRS MobilityManagement
GPRS attach procedure is one example.
When GPRS terminal is powered on , it sends an ‘attach’ message to the network.
SGSN authenticates before attaching to GPRS network.
Once sub. has attached to network, logical connection is established b/n MS,SGSN and HLR.

11. Session Management
Procedure to establish a connection to an external data network is called “PDP context activation”.
So, a connection is established between the MS and GGSN via the SGSN.

12. Mobility Management states
A GPRS MS has one of three mobility management states:
The Idle state is used when MS is passive(not GPRS attached)
Performing a GPRS attach, MS gets into Ready state.
Standby state is entered when sub. has ended an active phase but is still attached to network.

13. Mobility Management State
GPRS
Attach
/ Detach
Idle
Ready
READY
Timer Expiry
Packet
Standby
STANDBY
TX/RX
Timer Expiry
MS location known to
MS location known to
cell level.
MS location
SGSN level.
MS is transmitting or has
not known.
MS is capable of receiving
just been transmitting.
Subscriber is not
Point-to-Multipoint data
MS is capable of receiving
reachable by the
and being paged for
Point-to-Point data and
GPRS NW.
Point-to-Point data
Point-to-Multipoint data.

14. PDP context activation
After a successful GPRS attach , MS has to exchange data packets with external PDNs.
It must get an IP address to be able to connect to external PDNs.
This is PDP context activation.
It is an IP allocation to MS.

15. PDP context activation
It contains:
PDP types(IPv4)
PDP address assigned to MS
Requested QoS
Address of a GGSN that serves as access point to PDN.
This context is stored in –MS, SGSN and GGSN.

16. BSC & Packet Control Unit - PCU and Gb interface
SGSN
GGSN
MSC/VLR
HLR Gb
Gi (IP) Gn
Gr (MAP) Gs
MAP A IP
Network
Backbone
BSC/PCU
Gb interface - Frame Relay based interface towards SGSN
Allocation of PDCH in cells
Handling of GPRS Paging
Broadcast GPRS information

17. Serving GPRS Support Node – SGSN
Ciphering, authentication
Mobility management
Session management
Logical link management towards the MS
Charging data
Packet routing & transfer
Connection - HLR, MSC, BSC and SMS-MSC IP
Network
Gi (IP)
SGSN
GGSN MS Gn

18. Gateway GPRS Support Node – GGSN
External interfaces (Mobile IP applications, Internet/Intranets)
Access functionality
‘Traditional’ gateway functionality
Subscriber addresses publish
Routing
Charging data IP
Network
Gi (IP)
GGSN MS

19. IP Connectivity requirements
Internet
LAN Switches
Internal DNS servers for Internal address resolution
External DNS servers for initiating queries towards roaming partners
Synchronisation of Real-time clocks
Routers
WAN interfaces
SGSN – GGSN
GGSN to Internet
GGSN to Intranet
Roaming
Security Solution
Router
Corporates
Firewall
BSS
PLMN
GPRS
GSN
SGSN Gn
GSN
GGSN
Ethernet switch
Network
Element
Managers
Billing
Mediation
DNS
Server
NTP
Server
GPRS Service LAN

20. GPRS Support Nodes - Key Requirements
Support for Combined Procedures via Gs Interface
Support for SMS over GPRS
Support for Multiple PDP contexts per subscriber
Routing for handling corporate subscribers having similar private IP addressing scheme
RADIUS authentication and accounting support
Logical Partitioning to support multiple PLMN
Redundancy within the Node N+1 / 1+1

21. Checklist for GPRS Networks
New Network Elements:
SGSN and GGSN nodes or
CGSN Node
Service LAN (External DNS, Internal DNS)
Router on site to route to External IP Networks
Redundancy in entire solution to avoid any single point of failure
Security Solution

22. Connecting GPRS Nodes Corporate ISP/Internet Gr Gs Gd SS7
SMS GW-MSC
Corporate
HLR
MSC/VLR
Network Management and GPRS Services LAN
GGSN
SGSN
Gi Network
Router
IP Network (shared backbone) Gn Gp
SS7 Gs Gr Gd
External
IP network
BTS
BSC
PCU
BTS
Frame Relay Network Gb
BTS
BSC
Firewall
PCU
BTS
External
IP network
PCU
Other PLMNs
ISP/Internet

23. APNs used in BSNL APN Name Services
portalnorth.cellone.in Content Download
mmsnorth.cellone.in MMS Service
gprsnorth.cellone.in Laptop browsing
wapnorth.cellone.in WAP browsing

24. APN
A symbolic name for a network interface to an external network in the GGSN.
One GGSN could have several different access points to access different networks.

25. Getting Handset Settings
Two ways to get Handset Settings for
GPRS/MMS
SMS<MAKE><MODEL> to 8355
Go to and click at GPRS
setting Link, then choose your state.
Go by the GUI Instructions.

26. Default Settings Once Settings are received just SAVE them in Handset.
Now make Default Settings as follows:
WAP Browsing bsnlwap
LAPTOP Browsing bsnlgprs
Content Download bsnlportal
MMS Services bsnlmms

27. Connecting PC with GPRS Handset
Make sure the default Setting should be
bsnl-gprs(APN-gprsnorth.cellone.in)
Data Cable Connection (connect handset to PC)
Infrared Connection(make sure Infrared is ON at Laptop and handset)
Bluetooth Connection(make sure Bluetooth is ON at Laptop and handset)
Make Dial-up Connection using GPRS Handset-
Modem.
Use dialing sting *99# to connect.

28. Settings for WAP 1.x Handsets
(1)WAP Handset Browsing
Setting Name bsnlwap
Homepage URL
Proxy Address
Access Point Name wapnorth.cellone.in
Proxy Port
(Not required to be set in few handsets)

29. Laptop browsing WAP1.x (MS will act as modem )
Setting Name bsnlgprs
Homepage URL NA
Proxy Address Proxy Disable
Proxy Port Proxy Disable
Access Point Name gprsnorth.cellone.in
String to be given in Laptop/PC
``at+cgdcont=1,````ip````,````gprsnorth.cellone.in````,````````,0,0`` .
Procedure Step1: Go to Control panel>Phone and modems.
Step2: Go to Modems>select Modem over IR/Bluetooth/DATA Cable
Step3: Go to Properties>Advance>put the given string

30. (3) Portal Handset Browsing
Setting Name bsnlportal
Homepage URL
Proxy Address
Access Point Name portalnorth.cellone.in
Proxy Port
(Not required to be set in few handsets)

31. (4) MMS Service Settings
Setting Name bsnlmms
Homepage URL
Proxy Address
Access Point Name mmsnorth.cellone.in
Proxy Port
(Not required to be set in few handsets)

32. Settings for WAP 2.x Handsets
(1)WAP Handset Browsing
Setting Name bsnlwap
Homepage URL
Proxy Address
Access Point Name wapnorth.cellone.in
Proxy Port

33. (2) Laptop browsing WAP2.x (MS will act as modem )
Setting Name bsnlgprs
Homepage URL NA
Proxy Address Proxy Disable
Proxy Port Proxy Disable
Access Point Name gprsnorth.cellone.in
String to be given in Laptop/PC
``at+cgdcont=1,````ip````,````gprsnorth.cellone.in````,````````,0,0`` .
Procedure Step1: Go to Control panel>Phone and modems.
Step2: Go to Modems>select Modem over IR/Bluetooth/DATA Cable
Step3: Go to Properties>Advance>put the given string

34. (3) Portal Handset Browsing
Setting Name bsnlportal
Homepage URL
Proxy Address
Access Point Name portalnorth.cellone.in
Proxy Port

35. (4) MMS Service Settings
Setting Name bsnlmms
Homepage URL
Proxy Address
Access Point Name mmsnorth.cellone.in
Proxy Port

36. PLMN Roaming HPLMN ISP UPLMN VPLMN MS GGSN GGSN DNS SGSN GGSN
APN available in Home PLMN only
UPLMN
DNS MS
SGSN
SGSN
GGSN
GGSN
GGSN
GGSN
VPLMN

37. ISP Roaming HPLMN ISP VPLMN MS GGSN SGSN GGSN
APN available in Visited PLMN
DNS
ISP MS
SGSN
GGSN
GGSN
VPLMN

38. Customer segmentation required Straight Usage (Volume)
Tariff Structures
Service Level Based
Time Based
Flat Fee
Customer segmentation required
Transaction Based
Straight Usage (Volume)

39. Evolution to EDGE BTS BSC EDGE TRU GGSN SMS G/W MSC HLR AUC MSC/VLRGd
AUC M S
BTS
PCU
BSC
MSC/VLR Gr Gs
ISP Network Gb
EDGE TRU M S Gi
SGSN
GGSN Gn Gn
CorporateNetwork
Backbone Network

40. System upgrade for EDGE
EDGE TRU B S C R B S
BSC Software Upgrade
EDGE enabled RBS

41. Thanks!