Technical Overview of 3GPP LTE
May 18, 2008
Hyung G. Myung (hgmyung@ieee.org)
Technical Overview of 3GPP LTE | Hyung G. Myung
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Cellular Wireless System Evolution
Cellular Wireless System EvolutionCellular Wireless System Evolution
Cellular Wireless System Evolution
• 1G (Early 1980s)
– Analog speech communications.
– Analog FDMA.
– Ex: AMPS
• 2G (Early 1990s)
– Digital modulation of speech communications.
– Advanced security and roaming.
– TDMA and narrowband CDMA.
– Ex: GSM, IS-95 (cdmaOne), and PDC
• 3G (Late 1990s)
– Global harmonization and roaming.
– Wideband CDMA
– Ex: UMTS, cdma2000, and TD-SCDMA
Introduction
Technical Overview of 3GPP LTE | Hyung G. Myung
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Beyond 3G
Beyond 3GBeyond 3G
Beyond 3G
• International Mobile Telecommunications (IMT)-2000
introduced global standard for 3G.
• Systems beyond IMT-2000 (IMT-Advanced) is set to introduce
evolutionary path beyond 3G.
– Mobile class targets 100 Mbps with high mobility and nomadic/
local area class targets 1 Gbps with low mobility.
• 3GPP and 3GPP2 are currently developing evolutionary/
revolutionary systems beyond 3G.
– 3GPP Long Term Evolution (LTE)
– 3GPP2 Ultra Mobile Broadband (UMB)
• IEEE 802.16-based WiMAX is also evolving towards 4G through
802.16m.
Introduction
Technical Overview of 3GPP LTE | Hyung G. Myung
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3GPP Evolution
3GPP Evolution3GPP Evolution
3GPP Evolution
• Release 99 (Mar. 2000): UMTS/WCDMA
• Rel-5 (Mar. 2002): HSDPA
• Rel-6 (Mar. 2005): HSUPA
• Rel-7 (2007): DL MIMO, IMS (IP Multimedia Subsystem),
optimized real-time services (VoIP, gaming, push-to-talk).
• Long Term Evolution (LTE)
– 3GPP work on the Evolution of the 3G Mobile System started in
November 2004.
– Standardized in the form of Rel-8.
– Spec finalized and approved in January 2008.
– Target deployment in 2010.
– LTE-Advanced study phase in progress.
Introduction
Technical Overview of 3GPP LTE | Hyung G. Myung
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3GPP2 Evolution
3GPP2 Evolution3GPP2 Evolution
3GPP2 Evolution
• CDMA2000 1X (1999)
• CDMA2000 1xEV-DO (2000)
• EV-DO Rev. A (2004): VoIP
• EV-DO Rev. B (2006): Multi-carrier
• Ultra Mobile Broadband (UMB), f.k.a. EV-DO Rev. C
– Based on EV-DO, IEEE 802.20, and FLASH-OFDM
– Spec finalized in April 2007.
– Commercially available in early 2009.
Introduction
