1. GSM,GPRS & CDMA Technology
Comparative Study on
GSM,GPRS & CDMA Technology

2. Global System for Mobile Communications (GSM)
INTRODUCTION
GSM is a mobile telephony network based on the cellular
concept.
Users can place and receive calls without being fixed to a
specific location or wired to a physical connection.
To supply this capability, a GSM network consists of four
Basic components:
•The Mobile Station (MS).
•The Base Station Subsystem (BSS).
•The Network and Switching Subsystem (NSS).
•The Operation and Support Subsystem (OSS).

3. ARCHITECTURE PSDN ISDN PSTN PLMN OSS MS NSS SIM AUC HLR EIR MSC VLR
BSC
BTS
NSS
A Interface
Abis interface
UM interface MS

4. 1)Mobile Station- A Mobile Station consists of two main elements i
1)Mobile Station- A Mobile Station consists of two main elements i.e mobile equipment or terminal and Subscriber Identity Module (SIM).
2) The Base Station Subsystem -The BSS connects the Mobile Station and the NSS.
3) The Network and Switching Subsystem-Its main role is to manage the communications between the mobile users and other users, such as mobile users, ISDN users etc.
4) The Operation and Support Subsystem (OSS)-The OSS is connected to the different components of the NSS and to the BSC, in order to control and monitor the GSM system.

5. FUNCTIONS SERVICES 1)Transmission. 2)Radio Resources management (RR).
3)Mobility Management (MM).
4)Communication Management (CM).
5)Operation, Administration and Maintenance (OAM).
SERVICES
1) Teleservices.
2) Bearer services.
3) Supplementary Services

6. GENERAL PACKET RADIO SERVICE (GPRS)
INTRODUCTION
General Packet Radio Services (GPRS) is a standardized
packet switched data service for GSM.
The GPRS provides us with:
1) Fast coverage rollout, adding packet switching nodes to an
existing GSM network.
2) Efficient use of scarce radio resources

7. GPRS design is to support burst data transfer.
Two new elements are added to keep packet data traffic
separated from traditional GSM voice and data.
i.e. a) The Serving GPRS Support Node (SGSN)
b) The Gateway GPRS Support Node (GGSN).
The migration path from GSM to GPRS requires:
a) Additional packet switching nodes
b) Software upgrades in the base station subsystem
c) Transmission links can be reused
d) Station Controllers (BSCs) for both GSM and GPRS.

8. ARCHITECTURE Internet BSC Notebook BTS PSTN/SST MSC IP Network
IP BASED
GPRS BACKBONE
Cisco
GGSN
MSC
SGSN
BTS
BSC
Notebook

9. Data Transfer Time { in seconds}
GSM {9.6 Kbps}
GPRS {56 Kbps} 25 4
Web Page 42 7
Photo 83 14
Microsoft Word
250 43
Microsoft PowerPoint
833
143
Audio clip
1,667
286
Video clip
3,333
571
Data Transfer Comparison

10. ADVANTAGES Faster Data Transfer Rates Always-On Connection
Robust Connectivity
Broad Application Support
Security Support

11. CODE DIVISION MULTIPLE ACCESS (CDMA)
INTRODUCTION
CDMA is a "spread spectrum" technology, allowing many
users to occupy the same time and frequency allocations in
a given band/space.
The spectral spreading of the transmitted signal gives to
CDMA its multiple access capability.
CDMA is a form of Direct Sequence Spread Spectrum
communications

12. ARCHITECTURE Public Wired Phone network (PSTN) Mobile Station Base
Stations
Base Stations Controller
Switch
Wireline Telephone
Other Cellular Switches
Intelligent Add on Functions & Databases

13. BENEFITS
Outstanding Voice and Call Quality
Greatest Coverage for Lower Cost
Packet Data
Longer Talk Time, Longer Battery Life and
Smaller Phones
Fewer Dropped Calls
Improved Security and Privacy
Contd…

14. Greater Capacity
Reduced Background Noise and Interference
Rapid Deployment

15. CONCLUSION GSM has been the catalyst in the tremendous shift in
traffic volume from fixed networks to mobile networks.
GPRS cost is less than circuit- switched services since
communication channels are being used on a shared basis
and also the packets are need-based rather than dedicated
only to one user.
CDMA, for Code Division Multiple Access, is different
than those traditional ways in that it does not allocate
frequency or time in user slots but gives the right to use
both to all users simultaneously.

16. Thank you !!!