ppt on reliance communication

1. POWER POINT PRESENTATION
ON
SUMMER TRAINING
TAKEN AT
RELIANCE COMMUNICATIONS LTD
MCN, VKIA, JAIPUR
Submitted to : Submitted By :
Mr. Alok Kumar Priyanshu Sharma
Ms. Suman Godara (PGI/EC/12/072)
PTS Co-ordinator (ECE-B) ECE-B

2. FOUNDER OF RELIANCE COMMUNICATION
2
Reliance Communications Limited founded by the late Shri. Dhirubhai H
Ambani (1932-2002) is the flagship company of the Reliance Anil Dhirubhai
Ambani Group. Shri Anil D. Ambani – Chairman.

3. 3
1. Company Profile
2. Departments Overview
3. Media Overview
4. Wireless Communication
5. GSM Technology
6. CDMA Technology
7. Internet Generation
8. Conclusion
9. Thank you
10.Questions & Answers
PRESENTATION OUTLINESPRESENTATION OUTLINES

4. 4
COMPANY PROFILE
Type : Public (BSE: RCOM)
Founded : 2004
Headquarters : Navi Mumbai, India
Key people : Anil Ambani,
Chairman and Managing Director
Industry : Telecommunications
Products : CDMA service, GSM service, Broadband Internet Service
Revenue : US$ 4 Billion[2]
Employees : 33,000
Website : www.rcom.com

5. MEDIA OVERVIEW
OFC MUX MICROWAVE SATELLITE
5

6. 6
WIRELESS COMMUNICATIONS
 No physical connectivity is required.
 communication is done through Radio Links (E.M Waves)
and repeaters (CELL SITES) are placed in between per
entities for efficient communication.

7. 2 TYPES OF WIRELESS TECHNOLOGY
7

8. 8
GSM TECHNOLOGY
 Global System for Mobile Communication
 Global System for Mobile (GSM) is a second generation
cellular standard developed to cater voice services and data
delivery using digital modulation.

9. GSM SPECIFICATION
 GSM 900
 Mobile to BTS (uplink): 890-915 MHz
 BTS to Mobile(downlink): 935-960 MHz
 Bandwidth : 2* 25 MHz
 GSM 1800
 Mobile to BTS (uplink): 1710-1785 MHz
 BTS to Mobile(downlink): 1805-1880 MHz
 Bandwidth : 2* 75 MHz
9

10. 10
GSM ARCHITECTURE

11. MOBILE STATION (MS)
The Mobile Station consists of the Mobile Equipment (ME) and
the Subscriber Identity Module (SIM).
Mobile Equipment(ME)
•Portable hand held device
•Uniquely identified by an IMEI Voice and data transmission
•Monitoring power and signal quality of surrounding cells for optimum handover.
Subscriber Identity Module (SIM)
•Smart card contains IMSI
•Allows user to send and receive calls.
•Encoded network identification detail Key Ki,Kc and A3,A5 and A8 algorithms
•Protected by a password or PIN
•Can be moved from phone to phone
11

12. BASE STATION SUB-SYSTEM ( BSS ) :
 All radio related functions are performed in the BSS.
 Consists of Base station Controller(BSC) and Base
Station(BS).
 BSC – Cotrol functions and physical links between the
mobiles and BS.
 BS – Handles the radio interface to the mobile station.
12

13. BASE TRANSCEIVER STATION (BTS)
 Maintains air interface and minimize transmission problems.
 Paging information.
 Radio level power control.
 BTS identification.
 Ciphering
 Speech processing.
13

14. BASE STATION CONTROLLER (BSC)
 It is connected to MSC.
 Controls one or more BTS.
 Switches traffic and signaling
to/from BTSs and MSC.
 Connects terrestrial circuits and
channels on air interface.
 Controls handover performed by BTS.
 Frequency allocation and power control.
14

15. MAIN SWITCHING CENTER
15
 Heart of the Network
 Manages communication
between GSM and other networks
 Billing information and collection
 Mobility management
 Registration
 Location updating
 Inter BSS and inter MSC call handoff

16. HOME LOCATION REGISTERS (HLR)
-permanent database about mobile subscribers in a large service
area (generally one per GSM network operator)
-database contains IMSI,MSISDN, prepaid/postpaid, roaming
restrictions, supplementary services.
VISITOR LOCATION REGISTERS (VLR)
-Temporary database which updates whenever new MS enters its
area, by HLR database
-Controls those mobiles roaming in its area
-Reduces number of queries to HLR
-Mobile status(busy/free/no ans)
-Location area identity(LAI), TMSI AND MSRN .
16

17. ADVANTAGES OF GSMf GSM
 Better Quality of speech
 Data transmission is supported
 International Roaming possible
 Large market
 Crisper, cleaner quieter calls
 Increased Capacity
 Subscriber Identification
 Improved Security and Confidentiality
17

18. DISADVANTAGES OF GSM
 Dropped and missed calls
 Less Efficiency
 Security Issues
18

19. APPLICATIONS OF GSM
 Mobile telephony
 GSM-R
 Telemetry System
 - Fleet management
 - Automatic meter reading
 - Toll Collection
 - Remote control and fault
 reporting of DG sets
 Value Added Services
19 of 15

20. CDMA TECHNOLOGY
 Code Division Multiple Access
20

21. 21
 CDMA Channel or CDMA Carrier or CDMA Frequency
­ Duplex channel made of two 1.25 MHz­wide bands of electromagnetic
spectrum, one for Base Station to Mobile Station (DOWNLINK) and
another for Mobile Station to Base Station (UPLINK).
­ In 800 Cellular these two simplex 1.25 MHz bands are 45 MHz apart
­ In 1900 MHz PCS they are 80 MHz apart
 CDMA Forward & Reverse Channel
­ 1.25 MHz Forward / Reverse Link
 CDMA Code Channel
­ Each individual stream of 0’s and 1’s contained in either the CDMA
Forward Channel or in the CDMA Reverse Channel
­ Code Channels are characterized (made unique) by mathematical
codes
­ Code channels in the forward link: Pilot, Sync, Paging and Forward
Traffic channels
­ Code channels in the reverse link: Access and Reverse Traffic
channels

22. Multiple Access Schemes
22
Frequency
Time
Power
Frequency
Time
Power
Frequency
Time
Power
FDMA
TDMA
CDMA
 FDMA Frequency Division Multiple Access
– Each user on a different frequency
– A channel is a frequency
 TDMA Time Division Multiple Access
– Each user on a different window period
in time (“time slot”)
– A channel is a specific time slot on a
– specific frequency
 CDMA Code Division Multiple Access
– A channel is a unique code pattern
– Each user uses the same frequency all
the time, but mixed with different
– distinguishing code patterns

23. ADVANTAGES OF CDMA
 Spread Spectrum
 High quality voice
 Coverage
 Soft Handoff Because Of Same Carrier Frequency
 Increased Efficiency, Meaning That The Carrier Can Serve
More Subscriber.
 Smaller Phones. Low Power Requirements And Little Cell­to­
Cell Coordination Needed By Operators.
 Extended Reach ­ Beneficial To Rural Users Situated Far
From Cells.

23

24. DISADVANTAGES OF CDMA
Near far problem.
CDMA is relatively low, and the network is not as mature
as GSM.
CDMA can not offer international roaming, a large GSM
advantage.
Handsets are more sensitive to handling & costlier.
Switching to different services is almost not possible.
Service providers are few in number.
24

25. INTERNET GENERATION
25

26. FIRST GENERATION
1G first generation of wireless telephone technology, first introduced in 1980s
and completed in early 1990s.
It's Speed was upto 2.4kbps.
It allows the voice calls in 1 country.
1G network use Analog Signal.
Poor Voice Quality
Poor Battery Life
Large Phone Size
No Security
Limited Capacity
26

27. 2nd
GENERATION
 2G technology refers to the 2nd
generation which is based on GSM.
 It was launched in Finland in the year 1991.
 2G network use digital signals.
 It’s data speed was upto 64kbps.
 It enables services such as text messages, picture messages and MMS.
 It provides better quality and capacity .
 2.5G is a technology between the second (2G) and third (3G) generation.
 2.5G is sometimes described as 2G Cellular Technology combined with GPRS.
 Phone Calls, Send/Receive E-mail Messages,Web Browsing
 Speed : 64-144 kbps
 Camera Phones
 Take a time of 6-9 mins. to download a 3 mins. Mp3 song
27

28. 3rd
GENERATION
 3G technology refer to third generation which was introduced in year 2000s.
 Data Transmission speed increased from 144kbps- 2Mbps.
 Typically called Smart Phones and features increased its bandwidth and data
transfer rates to accommodate, web-based applications and audio and video files.
Providing Faster Communication
 Send/Receive Large Email Messages
 High Speed Web / More Security
 Video Conferencing / 3D Gaming
 TV Streaming/ Mobile TV/ Phone Calls
 Large Capacities and Broadband Capabilities
 11 sec – 1.5 min. time to download a 3 min Mp3 song.
 High Bandwidth Requirement, Expensive 3G Phones, Large Cell Phones
28

29. 4th
GENERATION
4G technology refer to or short name of fourth Generation which was started
from late 2000s.
Capable of providing 100Mbps – 1Gbps speed.
One of the basic term used to describe 4G is MAGIC.
MAGIC:
Mobile Multimedia
Anytime Anywhere
Global Mobility Support
Integrated Wireless Solution
Customized Personal Services
Also known as Mobile Broadband Everywhere.
High QOS and High Security
29

30. 5TH
GENERATION
 5G technology refer to short name of fifth Generation which was started from
late 2010s.
 Complete wireless communication with almost no limitations.
 It is highly supportable to WWWW (Wireless World Wide Web).
 High Speed, High Capacity
 5G technology providing large broadcasting of data in Gbps .
 Multi - Media Newspapers, watch T.V programs with the clarity as to that of an
HD Quality.
 Faster data transmission that of the previous generations.
 Large Phone Memory, Dialing Speed,clarity in Audio/Video.
 Support interactive multimedia , voice, streaming video, Internet and other
 5G is More Effective and More Attractive.
30

31. Transmission RF & Switch Data
Equipment's Equipment's
Equipment's
31

32. 32

33. Queries….???
33