compairative_study_gsm_cdma_gprs

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Comparative Study
on GSM,GPRS CDMA Technology
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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).
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• 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.

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• FUNCTIONS
• 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

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

• Faster Data Transfer Rates
• Always-On Connection
• Robust Connectivity
• Broad Application Support
• Security Support

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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
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ARCHITECTURE
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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
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Greater Capacity
Reduced Background Noise and Interference
Rapid Deployment
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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.
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Thank you !!!