Transcript 3 G DATA ACCESS - BSNL Durg SSA(Connecting India)

WHAT IS W-CDMA
 Wideband code division multiple access (W–
CDMA) is a CDMA channel that is four times
wider than the current channels that are typically
used in 2G network’s in North America.
Route to 3G
 1G: analog
 2G : 1st digital mobile telephony
 2.5G: transition from 2G to 3G
 3G standard: IMT 2000
THE EXPECTED GROWTH OF 3 G IN
INDIA
India is seeing an unprecedented increase in the
mobile users. According of one of the latest TRAI
reports released in November 2008, the total
number of mobile users in India has reached 325
million. In October 2008 alone, 10.42 million new
subscribers added. These figures are bound to
shoot up with the launch of 3G network.
3G: Overview
• International Mobile Telecommunications-2000
• 850, 900, 1800, 1900, 2100 MHz bands
• Introduces packet-switching (sharing)
• Increased security
• Typical speeds
o
o
300Kbps - 1.4Mbps download
100Kbps - 800Kbps upload
• Streaming multimedia
W-cdma features
Combines a mobile phone, laptop PC and TV
Features includes:
- Phone calls/fax
- Global roaming
- Send/receive large email messages
- High-speed Web
Navigation/maps
Videoconferencing
- TV streaming
- Electronic agenda meeting reminder.
Speed: 144kb/sec-2mb/sec
Time to download a 3min MP3 song:
11sec-1.5min
Evolution Paths
cdmaOne
IS-95A
cdmaOne
IS-95B
Cdma2000 1X
Cdma2000
1xEV-DO
Cdma2000
1xEV-DV
TDMA
IS-41 Core Network
EDGE
GSM
GPRS
GSM Map Core Network
2G
2.5G
3G
WCDMA
STANDARDS USED IN THE 3G MOBILES ARE
FOLLOWING
•W-CDMA also known as UMTS
•CDMA2000
•TD-CDMA / TD-SCDMA
•UWC (often implemented with EDGE)
•DECT
CDMA analogy
A room full of people speaking to each other.
Methods to distinguish conversations:
Speaking one at a time: TDMA
Speaking in different pitches: FDMA
Speaking in different languages: CDMA
UMTS
• Developed by 3rd Generation Partnership Projects
• Describes a network topology
Builds on GSM
Adds additional functionality
Complex network structure
• 3 physical layer (air interface) protocols
o W-CDMA
o TD-CDMA
o TD-SCDMA
o
o
o
Standardization of WCDMA / UMTS
WCDMA Air Interface, Main Parameters
Multiple Access Method
DS-CDMA
Duplexing Method
FDD/TDD
Base Station Synchronization
Channel Separation
5MHz
Chip Rate
3.84 Mcps
Frame Length
10 ms
Service Multiplexing
Multiple Services with different QoS
Requirements Multiplexed on one
Connection
Multirate Concept
Variable Spreading Factor and
Multicode
Detection
Coherent, using Pilot Symbols or
Common Pilot
Multiuser Detection, Smart
Antennas
Supported by Standard, Optional in
Implementation
12
W-CDMA Overview
• Initially developed by NTT DoCoMo in the late 1990's as the
3G air interface for their FOMA network
o Later added to the IMT-2000 family of standards
o Chosen for UMTS
• Most widely used UMTS air interface
• High service flexibility
o Variable data rates
o Connections can use multiple channels
• Used as basis for HSPA family of protocols
W-CDMA Technical
• Uses the 1920-1980, 2110-2170 MHz frequency range
• 'W' stands for wide band- 5MHz wide channels
• Full duplex
Frequency Division Duplexing (FDD)
Time Division Duplexing (TDD)
Uses CDMA protocol
Originally was capable of speeds of 2 Mbps
With HSPA, rates of 14.4 Mbps have been achieved
HSPA+ yields peak rates of 58 Mbps
o
o
•
•
•
•
3G TD-SCDMA
 In china, more than 8 millions GSM subscribers were






added in just 1 month.
china’s desire to craft its own wireless vision.
Chinese CATT and Siemens jointly submitted IMT-2000
3G standard based on Time Division Synchronous Code
Division Multiple Access
Relies on existing GSM infrastructure
1.6 MHz channel and smart antennas to yield more spectral
efficiency.
5 ms frames divided into 7 slots allocated to single data
only user or several slow users
TD-SCDMA allows easy upgrade to GSM.
15
High Speed Packet Access
• HSPA is built on W-CDMA
Software construct- requires minimal base station
upgrades
o Provides much faster data rates 14.4 Mbps downlink and
5.8 Mbps uplink
o System capacity increased 5x for downlink and 2x for
uplink
• Stands for 2 different protocols
o HSDPA - downlink
o HSUPA - uplink
• HSPA+
o Evolved HSPA, 58 Mbps downlink 22 Mbps uplink
• Utilized by the iPhone
o
3G Capabilities
 Voice quality comparable to the public switched
telephone network
 144 Kbps- user in high-speed motor vehicles
 384 Kbps- pedestrians standing or moving slowly
over small areas
 Up to 2 Mbps- fixed applications like office use
 Symmetrical/asymmetrical data transmission rates
 Support for both packet switched and circuit switched
data services like Internet Protocol (IP) traffic and real
time video
SERVICE PROVIDERS OF 3G IN INDIA
Some of the major mobile players in India are BSNL
mobile, Airtel mobile, Reliance mobile and Tata mobile. At
one time Aircel mobile was leading the market; however, it
has now lost the market share to BSNL mobile, Airtel
mobile and other leading mobile players.
ADVANTAGES OF 3G TECHNOLOGY
The Operations
Utilizing the Technology
Getting Info
Faster Speed
On Price
Utilization
• AT&T utilizes HSPA which yields speeds upwards of 14.4
Mbps
• QUALCOMM companies utilize EV-DO which yields speeds
of 3.1 Mbps
Features of W-CDMA
Key features of W-CDMA systems are a high
degree of commonality of design worldwide,
compatibility of services, use of small pocket
terminals with worldwide roaming capability,
Internet and other multimedia applications, and
a wide range of services and terminals.
3G Multimedia Applications
Features of 3G that make it well suited for multimedia:
• Always on data transfer
• Multiple directional
data transfer
• IP datagrams
• High data speeds
Conclusion
• Multimedia will continue to be more ubiquitous in mobile
devices as time goes on
• To keep up with the improving multimedia technologies,
data rates and mobile devices will need to evolve with it
• There will always be a desire for higher bandwidth
• Market is constantly evolving, 4G is only the next step