24-02-2011, 09:31 AM
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Overview of 3G
Why 3G?
• Higher bandwidth enables a range of new applications!!
• For the consumer
– Video streaming, TV broadcast
– Video calls, video clips – news, music, sports
– Enhanced gaming, chat, location services…
• For business
– High speed teleworking / VPN access
– Sales force automation
– Video conferencing
– Real-time financial information
3G services in Asia
• CDMA (1xEV-DO)
– Korea: SKT, KTF
– Japan: AU (KDDI)
• WCDMA / UMTS
– Japan: NTT DoCoMo, Vodafone KK
– Australia: 3 Hutchinson
– Hong Kong: 3 Hutchinson
3G Standards
• 3G Standard is created by ITU-T and is called as IMT-2000.
• The aim of IMT-2000 is to harmonize worldwide 3G systems to provide Global Roaming.
Upgrade paths for 2G Technologies
Evolution of Mobile Systems to 3G
- drivers are capacity, data speeds, lower cost of delivery for revenue growth
Performance evolution of cellular technologies
Services roadmap
2G TECHNOLOGIES
GSM evolution to 3G
GPRS
• General Packet Radio Service
– Packet based Data Network
– Well suited for non-real time internet usage including retrieval of email, faxes and asymmetric web browsing.
– Supports multi user network sharing of individual radio channels and time slots.
– Provides packet network on dedicated GSM radio channels
– GPRS overlays a packet-switched architecture on existing GSM network architecture
• Variable performance…
– Packet Random Access, Packet Switched
– Content handling
– Throughput depends on coding scheme, # timeslots etc
– From ~ 9 kbps min to max. of 171.8 kbps (in theory!)
• Modulation – GMSK
• Symbol Rate – 270 ksym/s
• Modulation bit rate – 270 kbps
• Radio data rate per time slot – 22.8kbps
• User data rate per time slot – 20kbps (CS4)
• User data rate (8 time slots) – 160kbps, 182.4kbps
• Applications are required to provide their own error correction scheme as part of carried data payload.
Channel data rates determined by Coding Scheme
CS1 guarantees connectivity under all conditions (signaling and start of data)
CS2 enhances the capacity and may be utilised during the data transfer phase
CS3/CS4 will bring the highest speed but only under good conditions
Overview of 3G
Why 3G?
• Higher bandwidth enables a range of new applications!!
• For the consumer
– Video streaming, TV broadcast
– Video calls, video clips – news, music, sports
– Enhanced gaming, chat, location services…
• For business
– High speed teleworking / VPN access
– Sales force automation
– Video conferencing
– Real-time financial information
3G services in Asia
• CDMA (1xEV-DO)
– Korea: SKT, KTF
– Japan: AU (KDDI)
• WCDMA / UMTS
– Japan: NTT DoCoMo, Vodafone KK
– Australia: 3 Hutchinson
– Hong Kong: 3 Hutchinson
3G Standards
• 3G Standard is created by ITU-T and is called as IMT-2000.
• The aim of IMT-2000 is to harmonize worldwide 3G systems to provide Global Roaming.
Upgrade paths for 2G Technologies
Evolution of Mobile Systems to 3G
- drivers are capacity, data speeds, lower cost of delivery for revenue growth
Performance evolution of cellular technologies
Services roadmap
2G TECHNOLOGIES
GSM evolution to 3G
GPRS
• General Packet Radio Service
– Packet based Data Network
– Well suited for non-real time internet usage including retrieval of email, faxes and asymmetric web browsing.
– Supports multi user network sharing of individual radio channels and time slots.
– Provides packet network on dedicated GSM radio channels
– GPRS overlays a packet-switched architecture on existing GSM network architecture
• Variable performance…
– Packet Random Access, Packet Switched
– Content handling
– Throughput depends on coding scheme, # timeslots etc
– From ~ 9 kbps min to max. of 171.8 kbps (in theory!)
• Modulation – GMSK
• Symbol Rate – 270 ksym/s
• Modulation bit rate – 270 kbps
• Radio data rate per time slot – 22.8kbps
• User data rate per time slot – 20kbps (CS4)
• User data rate (8 time slots) – 160kbps, 182.4kbps
• Applications are required to provide their own error correction scheme as part of carried data payload.
Channel data rates determined by Coding Scheme
CS1 guarantees connectivity under all conditions (signaling and start of data)
CS2 enhances the capacity and may be utilised during the data transfer phase
CS3/CS4 will bring the highest speed but only under good conditions
