1. Third Generation (3G) Mobile Communication Systems
Vijay K. Garg Ph.D, P.E, Samuel Halpern M.S., and Kenneth F. Smolik, Ph.D., P.E.
Bell Labs, Lucent Technologies Inc., Naperville, IL. USA; © 1999 IEEE
Presented by: Jacob (Jack) Gryn
November 21, 2002
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2. Jacob (Jack) Gryn - November 21, 2002
Introduction
ITU Studies future of wireless telecomm in 1986
Study shows need for high-speed data and multimedia services
Standards were defined based on these needs
Migration plans were developed for existing networks
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3. Jacob (Jack) Gryn - November 21, 2002
Agenda
Evolution of 2G systems for higher data rates
Third-Generation Systems
Industry Trends
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4. Jacob (Jack) Gryn - November 21, 2002
Evolution of 2G Systems
Evolution of CDMA IS-95
Evolution of GSM
Evolution of TDMA IS-136 (DAMPS)
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5. Evolution of CDMA (IS-95)
Current 2.5G system is called IS-95B
Data rates between kbps
Up to eight 14.4kbps traffic channels
Improved soft-handovers
(note: not mentioned, 1xRTT technology currently allows up to 144kbps data on IS-95)
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6. Jacob (Jack) Gryn - November 21, 2002
Evolution of GSM
GPRS: Introduction of General Packet Radio Services
GPRS: Up to 144kbps (currently at 56kbps)
EDGE: Future implementation of Enhanced Data Rates for GSM Evolution
EDGE: Up to 384kbps slow movement (walking), 144kbps High speed motion (car), 2Mbps for office use (1.6MHz bandwidth)
EDGE: Like GSM, 8 Time slots per TDMA frame
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Jacob (Jack) Gryn - November 21, 2002

7. Evolution of TDMA (IS-136/DAMPS)
2.5G DAMPS is not used in any current system, however standards exist…
IS-136+ data rates up to 64kbps
IS-136 HS data rates up to 2Mbps
GPRS-136 data rates up to 44.4kbps
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8. Third Generation Systems
Future Radio wideband Multiple Access Systems (FRAMES Multiple Access, FMA)
UMTS (Universal Mobile Telecommunications Systems)
European Systems: FMA1 (WB-TDMA, TD-CDMA), FMA2 (W-CDMA)
North American Systems: CDMA-2000, FMA2 (W-CDMA)
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9. Jacob (Jack) Gryn - November 21, 2002
FMA1
WB-TDMA
Not spread spectrum
Frequency Division Duplex (FDD)
MHz Uplink, MHz Downlink
TD-CDMA
Direct Sequence Spread Spectrum
Time Division Duplex (TDD)
MHz
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10. Jacob (Jack) Gryn - November 21, 2002
FMA1
WB-TDMA - FDD
All time slots in a frame either uplink or downlink
TD-CDMA - TDD
Time slots dynamically divided between uplink and downlink.
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FMA1
Frame length of 4.615ms (same as GSM)
Time slots divided into 1/64, 1/16 and 1/8 slot
Different services use different length time slots
Bandwidth of 1.6MHz in GSM900/1800 range and in UMTS 2GHz range
Can handle circuit switched & packet switched data services
Two lengths of synchronization packets to allow cell sizes of 5 and 36km
Data rates of up to 2Mbps
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FMA2 (W-CDMA)
5MHz bandwidth in the UMTS 2GHz frequency.
Direct Sequence Spread Spectrum
Chip rate of 4.096MChips/sec
Frame duration of 10ms
Frames divided into 16 time slots of 0.625ms
Data rate up to 2048kbps down/1024kbps up
Gold AND Walsh sequences used to generate spreading codes
Parallel transport channels
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CDMA-2000
Direct Sequence Spread Spectrum
Up to >2Mbps data rate
Channel sizes in multiples of 1.25MHz (up to 20MHz)
3.6864Mchip/sec on 5MHz BW
1.2288Mchip/sec for multiple carriers at 1.25MHz BW
Spreading code generated using phase shifts of the same PN sequence. (Same as existing IS-95B)
Fast closed-loop power control
5 and 20ms frame sizes
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14. Jacob (Jack) Gryn - November 21, 2002
Industry Trends
Plans for Europe
GSMEDGEW-CDMA
Plans for North America
IS-95AIS-95BCDMA2000
IS-136IS-136+W-TDMAW-CDMA
(mentioned in paper, but not likely since TDMA providers are moving to GSM)
Expectation that CDMA2000 and W-CDMA will eventually be interoptable for roaming
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15. Where to Get More Information
IEEE Journals
Cell phone manufacturer web sites
White papers for 3G technologies
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