Sunday, January 24, 2010

High Speed Downlink Packet Access(HSDPA)

[ High Speed Downlink Packet Access(HSDPA)]
A 3G technology of telecommunication…… -


Wireless phone advanced through several generation …..
1G-First Generation of wireless telephone technology used ANALOG type radio signals…..where 2G-second Generation was totally based on DIGITAL signals….which was divided into TDMA &CDMA technology…….which contains SMS facilities ….
3G is the third generation of tele -standards and technology for mobile networking. It is based on the International Telecommunication Union (ITU) family of standards under the IMT-2000 Entering the 21st century, markets will require higher and higher bandwidth, for internet access…The mobile office concept will be one of the drivers behind this bandwidth need.
All major service providers and equipment vendors have accepted the evolution model of
W-CDMA(UMTS) to /HSDPA (High Speed Downlink Packet Access)(AS 3.5G)

HSDPA promises a date rate of up to 10Mbps and higher spectrum efficiencies

HSDPA provides Unprecedented speed and mobility:
1) IP-based network, optimized for packet data;
2) Complementary to existing and future voice networks;
3) Enabling wireless web lifestyle;
4) Next generation performances.

HSDPA Improving the WCDMA downlink

SPEED : up to 14 Mbps BANDWIDTH: up to 5Mhz
CAPACITY : 3 – 4 times improved system capacity Rel. 5/6
REDUCED DELAY : Quicker response time with interactive services
STANDARDIZED : Integral part of WCDMA (3GPP Rel.5/6)
Network Coverage : Short time to market with existing sites
This all things can be with HSDPA- based MOBILE CELL

q Video
q Audio
q Games
q TV
q Others:
- Maps
- Location
- etc
Now-a days HSDPA is available in PC cards, phones, Laptops, tablet PC
Outline
— Cellular Networks
— Different Generation in wireless communication
— 3G Cellular Networks
— What’s up with 3G technology
— UMTS-CDMA
— HSDPA


1>The Cellular Architecture
Coverage area divided into cells
Each cell has its own base station that handles the calls on the cell
And now all this base station are connected to the switch…
Now switch is connected with PSTN to the satalite

2> Different Generation in wireless communication

1G-First Generation of wireless telephone technology used ANALOG type radio signals…..in 1980
2G-Second Generation was totally based on DIGITAL signals….which was divided into TDMA &CDMA technology…….which contains SMS facilities ….in around 1991
2.5G-It added more frills to 2G
-limited web browsing
- SMS
And now 3G….
— It is based on the International Telecommunication Union (ITU) family of standards under the IMT-2000
— Entering the 21st century, markets will require higher and higher bandwidth, for internet access…
The mobile office concept will be one of the drivers behind this bandwidth need
2.5G has main two technology
1>GPRS-which is evaluated in UMTS(WCDMA) now WCDMA is evaluated in HSDPA
2>IS-95B CDMA is evaluated in 1×EV-DO(CDMA) & 1×EV-DV(CDMA)

3> 3G CELLUAR NETWORK
— 3G networks enable network operators to offer users a wider range of more advanced services while achieving greater network capacity through improved spectral efficiency.
— Services include wide-area wireless voice telephony, video calls, and broadband wireless data, all in a mobile environment.
— Additional features also include HSPA data transmission capabilities able to deliver speeds up to 14.4 Mbit/s on the downlink and 5.8 Mbit/s on the uplink.
— Unlike IEEE 802.11 networks, which are commonly called Wi-Fi or WLAN networks, 3G networks are wide-area cellular telephone networks that evolved to incorporate high-speed Internet access and video telephony. IEEE 802.11 networks are short range, high-bandwidth networks primarily developed for data.
4>What's up with 3G mobile
q Video
q Audio
q Games
q TV
q Others:
- Maps
- Location
- etc.
5>UMTS-technology
q 3G mobile system developed by European Telecommunication Standardization Institute (ETSI) within the ITU’s IMT-2000 framework
q Provides data rates of up to 2Mbps making portable videophones a reality
q Supports new multimedia applications:
- video conferencing
- video on demand
- web browsing, etc.

Towards HSDPA
q High demand for multimedia applications requires high data rates above 2Mbps
q Demand for new application
q Release 5 and 6 of UMTS introduced a new features known as HSDPA

6>HSDPA

q High speed downlink data channel is shared between cell’s users
q Up to 15 channels can be used for HSDPA
q Provides peak data rate of up to 10Mbps
q Supports new applications and improves QoS of existing ones


Fast Packet Scheduling

q Controls the channels’ allocation to users within coverage area
q PS decides which user should transmit during any time interval
q For Max throughput:
à PS considers Channel Condition of users to be scheduled
à Maximum Channel Quality (Max CQI) : highest priority for user with best channel condition



HSDPA Improving the WCDMA downlink

SPEED : up to 14 Mbps

BANDWIDTH: up to 5Mhz

CAPACITY : 3 – 4 times improved system capacity Rel. 5/6
REDUCED DELAY : Quicker response time with interactive services
STANDARDIZED : Integral part of WCDMA (3GPP Rel.5/6)
Network Coverage : Short time to market with existing sites

Now-a days HSDPA is available in PC cards, phones, Laptops, tablet PC

THANK YOU….

— ENJOY
LIFE
WITH
HSDPA……!!!!!!!

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