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Arief Hamdani Gunawan 21 November 2009
Main Topics  ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
LTE market situation based on HSPA success story ,[object Object],[object Object],[object Object],[object Object],Sources: www.gsacom.com, R&S
LTE background story the early days ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Introduction to LTE ,[object Object],[object Object],[object Object],[object Object]
Major requirements for LTE identified during study item phase in 3GPP ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
3G deployment in the world China Mobile NTT DoCoMo ( 2010 ) KDDI Verizon ( 2009 ) AT&T W ( 2010 ) Vodafone ( 2011 ) T-Mobile ( 2010 ) China Telecom HSPA+ DL>40MBps; UL>10Mbps TD-HSDPA 2.8~8.4Mbps TD-HSUPA 2.2~6.6Mbps WCDMA 384Kbps HSDPA 1.8/3.6Mbps HSDPA 7.2Mbps HSUPA 1.4~5.8Mbps LTE TDD DL:100Mbps UL:50Mbps TD-HSPA+   DL:>25.2Mbps UL:>19.2Mbps EV-DO Rel. 0 DL: 2.4Mbps UL:153.6kbps cdma2000 1x  153.6kbps D0 Rel. A DL: 3.1Mbps UL: 1.8Mbps Do Rev B (Multi Carrier DO) DL : 46.5Mbps UL: 27Mbps LTE FDD DL:100Mbps UL:50Mbps LTE TDD1 LTE TDD2
Trend of B3G  ITU IMT-Advanced(4G) UMB +  100Mbps-1Gbps 100Mbps~ 1Gbps LTE+ FDD/TDD DL:100Mbps UL:50Mbps LTE-FDD WIMAX 3GPP 3GPP2 B3G EV-DO Rel. 0 DL: 2.4Mbps UL:153.6kbps cdma2000 1x  153.6kbps D0 Rel. A DL: 3.1Mbps UL: 1.8Mbps Do Rev B ( 多载波  DO ) DL : 46.5Mbps UL: 27Mbps UMB  DL: 100Mbps UL: 50Mbps TD-HSPA+  DL:>25.2Mbps UL:>19.2Mbps TD-HSDPA 2.8~8.4Mbps TD-HSUPA 2.2~6.6Mbps HSPA+ DL>40MBps; UL>10Mbps WCDMA 384Kbps HSDPA 1.8/3.6Mbps HSDPA 7.2Mbps HSUPA 1.4~5.8Mbps GREAN ~600kbps GPRS/EDGE ~ 200kbps LTE-TDD DL:100Mbps UL:50Mbps 16m 100Mbps~1Gbps Mobile WiMAX Wave1 15Mbps Mobile WiMAX Wave2 30Mbps
4G Technologies Mobile WiMAX 3GPP IP E2E Network IP E2E Network CKT Switched Network OFDMA - Based CDMA - Based IMT- Advanced 2008 2009 2010 2011 2012
Evolution of UMTS FDD and TDD driven by data rate and latency requirements
LTE Network Architecture
LTE will Ensure the Success of Mobile Internet
LTE Offers 10-30x Improvement on cost/performance vs. existing technologies
LTE – The Right Solution for Mobile Internet
What’s Happening in Mobile Internet World -- Device Providers --
LTE Key Parameters
Modulation ,[object Object],[object Object],[object Object]
Requirements to be met by LTE Fast, Efficient, Cheap, Simple ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Simplified LTE network elements and interfaces 3GPP TS 36.300 Figure 4: Overall Architecture eNB =  E-UTRAN Node B All radio interface-related functions MME =  Mobile Management entity –  Manages mobility, UE identity, and security parameters. S-GW =  Serving Gateway –  Node that terminates the interface towards E-UTRAN. P-GW = PDN (Packet Data Network) Gateway –  Node that terminates the interface towards PDN.
LTE Network Architecture ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
PDCP = Packet Data Convergence Protocol RRC = Radio Resource Control RLC = Radio Link Control
Protocol
System Architecture Evolution ,[object Object],[object Object],[object Object]
Why   LTE/SAE? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
LTE Overview ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
LTE technical objectives and architecture ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object]
LTE radio interface ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],From Ericsson, H. Djuphammar
LTE/SAE Keywords ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
3GPP TR 23.401 / 25.813 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Network Entities: MME ID eNB ID TAI Network: PLMN EPS ID EUTRAN: E-UTRAN C-RNTI RA-RNTI UE: IMEI IMSI S-TMSI LTE/SAE Network Identifiers
System architecture evolution
RAN interfaces ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],S1 S8 X2 X2 eNB aGW eNB aGW eNB
SAE architecture [3GPP TS 23.401] Evolved Packet Core S11 S2 S3 S4 S7 S6 SGi S1 Gb Iu Rx+ X1 X1 X2 Evolved RAN aGW S5 GERAN UTRAN GPRS Core MME UPE SAE GW PCRF Operator IP  services (including IMS, PSS, ...) Non-3GPP IP Access eNB eNB PDN SAE GW HSS
SAE architechture [3GPP TS 23.401] S1 TBD S8 X2 Operator IP  service, including IMS S11 S11 S5 SGi Evolved RAN IASA aGW = MME/UPE S6a S7 TBD eNB TBD eNB aGW eNB SAE GW PDN SAE GW HSS PCRF aGW
Functions of eNB ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Functions of aGW ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object]
Functions S1
[object Object],aGW UE eNB S1 RRC RLC MAC PHY PDCP RRC RLC MAC PHY PDCP NAS NAS
[object Object],aGW UE eNB S1 RLC MAC PHY PDCP RLC MAC PHY PDCP IP IP
GTP-U tunneling SAE GW UPE eNB Server UE L1 L2 X1 S1 S11 SGi S5 PDN SAE GW Header compression & encryption Radio L1 MAC PDCP IPv6/v4 u Application TCP/UDP RLC L1 L2 IP UDP GTP-U L2 L1 IP UDP GTP-U L2 L1 IP UDP GTP-U L2 L1 IPv6/v4 TCP/UDP Application L1 L2 IP UDP GTP-U L2 L1 IP UDP GTP-U L2 L1 IP UDP GTP-U L2 L1 Radio L1 MAC RLC PDCP ENC
Non-3GPP access tunneling PDN SAE GW HA AP Server UE IP L2 L1 IPv6/v4 TCP/UDP Application L1 L2 WLAN S2 SGi L2 L1 IP MIP IPv4/6 IP UDP IP MIP IPv4/6 UDP IP L2 L1 IP L2 L1 L1 L2 L1 L2
LTE Physical Layer ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Channel Mapping
LTE Physical Signals
LTE Physical Channels
LTE Transport Channels ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
LTE Logical Channels ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
LTE Frame Structure (Downlink) ,[object Object],[object Object]
 
FDD (left) and TDD (right) frequency bands defined in the 3GPP (May 2009)
Downlink Transmission Scheme ,[object Object],[object Object]
OFDM ,[object Object],[object Object]
OFDM signal generation chain ,[object Object],On receiver side, an FFT operation will be used.
Modulation ,[object Object],[object Object],[object Object]
Difference between OFDM and OFDMA ,[object Object],[object Object]
LTE downlink conventional OFDMA Frequency-Time Representation of an OFDM Signal ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Frequency and Time Domain Representation  ,[object Object]
OFDMA time-frequency multiplexing
LTE – spectrum flexibility ,[object Object],[object Object],[object Object]
Generic frame structure in E-UTRA downlink ,[object Object],[object Object]
Downlink Resource Grid ,[object Object],[object Object],[object Object],[object Object]
The LTE downlink physical resource based on OFDM
Parameters for downlink generic frame structure
Downlink Data Transmission ,[object Object],[object Object],[object Object]
Downlink Reference Signal Structure and Cell Search ,[object Object],[object Object]
Downlink reference signal structure
P-SCH and S-SCH ,[object Object],[object Object],[object Object],[object Object],[object Object]
P-SCH and S-SCH structure
CCPCH ,[object Object],[object Object]
Downlink Physical Layer Procedures ,[object Object],[object Object],[object Object],[object Object]
DL Physical Channel Processing
LTE frame structure type 1 (FDD), downlink
LTE frame structure type 2 (TDD)
Uplink Transmission Scheme ,[object Object],[object Object]
Single-Carrier Frequency Division Multiple Access (SC-FDMA) ,[object Object],[object Object],[object Object],[object Object],[object Object]
How to generate SC-FDMA ,[object Object],[object Object],[object Object],Each subcarrier carries a portion of superposed DFT spread data symbols, therefore SC-FDMA is also referred to as DFT-spread-OFDM (DFT-s-OFDM).
How does a SC-FDMA signal look like ,[object Object],[object Object],[object Object]
OFDMA and SC-FDMA
Why does SC-FDMA have a low PAPR? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
SC-FDMA in comparison with OFDMA and DS-CDMA/FDE
SC-FDMA signal generation Localized vs. distributed FDMA
Uplink Slot Structure
Parameters for uplink generic structure
Uplink Data Transmission ,[object Object],[object Object],[object Object],[object Object]
PUSCH and PUCCH ,[object Object],[object Object]
Uplink Reference Signal Structure ,[object Object],[object Object],[object Object]
UL Physical Channel Processing
Cell Search ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Spatial Multiplexing Spatial multiplexing allows to transmit different streams of data simultaneously on the same downlink resource block(s).  These data streams can belong to one single user (single user MIMO / SU-MIMO) or to different users (multi user MIMO / MU-MIMO).  While SU-MIMO increases the data rate of one user, MU-MIMO allows to increase the overall capacity. Spatial multiplexing is only possible if the mobile radio channel allows it.
LTE MIMO concept
Multiple Antenna Schemes in LTE ,[object Object],[object Object]
LTE cooperative MIMO
Collaborative/Network MIMO overview Coordinate transmission and reception of signals among multiple bases. Reduces intercell interference and improves cell-edge performance and overall throughput. Collaborative MIMO : share user data and long-term noncoherent channel information. Coherent network MIMO : share user data and short-term coherent channel information.
Multi-Mode Adaptive MIMO for DL/UL ,[object Object],[object Object],[object Object],[object Object],A uniform  MIMO platform  SU-MIMO MU-MIMO Collaborative/ Network  MIMO adaptive selection MAC layer Cross-layer  design
Key technologies in Multi-mode Adaptive MIMO Cellular system Collaborative/Network MIMO MU-MIMO SU-MIMO ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Multicast Anchor Serving eNB/ per User Data + Sync Protocol for DL (Extension of eMBMS protocol); Data + Channel Estimates for UL  eNBs have to be synchronized !!! MIMO channel
[object Object],[object Object],[object Object]
Requirements of LTE Advanced ,[object Object],[object Object],[object Object],[object Object],[object Object]
Technological proposals for LTE Advanced ,[object Object],[object Object],[object Object],Carrier aggregation and  Spectrum aggregation
Conclusion ,[object Object],[object Object],[object Object]
References ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
References ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
[email_address] Thank You !

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LTE - Long Term Evolution

  • 1. Arief Hamdani Gunawan 21 November 2009
  • 2.
  • 3.
  • 4.
  • 5.
  • 6.
  • 7. 3G deployment in the world China Mobile NTT DoCoMo ( 2010 ) KDDI Verizon ( 2009 ) AT&T W ( 2010 ) Vodafone ( 2011 ) T-Mobile ( 2010 ) China Telecom HSPA+ DL>40MBps; UL>10Mbps TD-HSDPA 2.8~8.4Mbps TD-HSUPA 2.2~6.6Mbps WCDMA 384Kbps HSDPA 1.8/3.6Mbps HSDPA 7.2Mbps HSUPA 1.4~5.8Mbps LTE TDD DL:100Mbps UL:50Mbps TD-HSPA+ DL:>25.2Mbps UL:>19.2Mbps EV-DO Rel. 0 DL: 2.4Mbps UL:153.6kbps cdma2000 1x 153.6kbps D0 Rel. A DL: 3.1Mbps UL: 1.8Mbps Do Rev B (Multi Carrier DO) DL : 46.5Mbps UL: 27Mbps LTE FDD DL:100Mbps UL:50Mbps LTE TDD1 LTE TDD2
  • 8. Trend of B3G ITU IMT-Advanced(4G) UMB + 100Mbps-1Gbps 100Mbps~ 1Gbps LTE+ FDD/TDD DL:100Mbps UL:50Mbps LTE-FDD WIMAX 3GPP 3GPP2 B3G EV-DO Rel. 0 DL: 2.4Mbps UL:153.6kbps cdma2000 1x 153.6kbps D0 Rel. A DL: 3.1Mbps UL: 1.8Mbps Do Rev B ( 多载波 DO ) DL : 46.5Mbps UL: 27Mbps UMB DL: 100Mbps UL: 50Mbps TD-HSPA+ DL:>25.2Mbps UL:>19.2Mbps TD-HSDPA 2.8~8.4Mbps TD-HSUPA 2.2~6.6Mbps HSPA+ DL>40MBps; UL>10Mbps WCDMA 384Kbps HSDPA 1.8/3.6Mbps HSDPA 7.2Mbps HSUPA 1.4~5.8Mbps GREAN ~600kbps GPRS/EDGE ~ 200kbps LTE-TDD DL:100Mbps UL:50Mbps 16m 100Mbps~1Gbps Mobile WiMAX Wave1 15Mbps Mobile WiMAX Wave2 30Mbps
  • 9. 4G Technologies Mobile WiMAX 3GPP IP E2E Network IP E2E Network CKT Switched Network OFDMA - Based CDMA - Based IMT- Advanced 2008 2009 2010 2011 2012
  • 10. Evolution of UMTS FDD and TDD driven by data rate and latency requirements
  • 12. LTE will Ensure the Success of Mobile Internet
  • 13. LTE Offers 10-30x Improvement on cost/performance vs. existing technologies
  • 14. LTE – The Right Solution for Mobile Internet
  • 15. What’s Happening in Mobile Internet World -- Device Providers --
  • 17.
  • 18.
  • 19. Simplified LTE network elements and interfaces 3GPP TS 36.300 Figure 4: Overall Architecture eNB = E-UTRAN Node B All radio interface-related functions MME = Mobile Management entity – Manages mobility, UE identity, and security parameters. S-GW = Serving Gateway – Node that terminates the interface towards E-UTRAN. P-GW = PDN (Packet Data Network) Gateway – Node that terminates the interface towards PDN.
  • 20.
  • 21. PDCP = Packet Data Convergence Protocol RRC = Radio Resource Control RLC = Radio Link Control
  • 23.
  • 24.
  • 25.
  • 26.
  • 27.
  • 28.
  • 29.
  • 30.
  • 32.
  • 33. SAE architecture [3GPP TS 23.401] Evolved Packet Core S11 S2 S3 S4 S7 S6 SGi S1 Gb Iu Rx+ X1 X1 X2 Evolved RAN aGW S5 GERAN UTRAN GPRS Core MME UPE SAE GW PCRF Operator IP services (including IMS, PSS, ...) Non-3GPP IP Access eNB eNB PDN SAE GW HSS
  • 34. SAE architechture [3GPP TS 23.401] S1 TBD S8 X2 Operator IP service, including IMS S11 S11 S5 SGi Evolved RAN IASA aGW = MME/UPE S6a S7 TBD eNB TBD eNB aGW eNB SAE GW PDN SAE GW HSS PCRF aGW
  • 35.
  • 36.
  • 37.
  • 39.
  • 40.
  • 41. GTP-U tunneling SAE GW UPE eNB Server UE L1 L2 X1 S1 S11 SGi S5 PDN SAE GW Header compression & encryption Radio L1 MAC PDCP IPv6/v4 u Application TCP/UDP RLC L1 L2 IP UDP GTP-U L2 L1 IP UDP GTP-U L2 L1 IP UDP GTP-U L2 L1 IPv6/v4 TCP/UDP Application L1 L2 IP UDP GTP-U L2 L1 IP UDP GTP-U L2 L1 IP UDP GTP-U L2 L1 Radio L1 MAC RLC PDCP ENC
  • 42. Non-3GPP access tunneling PDN SAE GW HA AP Server UE IP L2 L1 IPv6/v4 TCP/UDP Application L1 L2 WLAN S2 SGi L2 L1 IP MIP IPv4/6 IP UDP IP MIP IPv4/6 UDP IP L2 L1 IP L2 L1 L1 L2 L1 L2
  • 43.
  • 47.
  • 48.
  • 49.
  • 50.  
  • 51. FDD (left) and TDD (right) frequency bands defined in the 3GPP (May 2009)
  • 52.
  • 53.
  • 54.
  • 55.
  • 56.
  • 57.
  • 58.
  • 60.
  • 61.
  • 62.
  • 63. The LTE downlink physical resource based on OFDM
  • 64. Parameters for downlink generic frame structure
  • 65.
  • 66.
  • 68.
  • 69. P-SCH and S-SCH structure
  • 70.
  • 71.
  • 72. DL Physical Channel Processing
  • 73. LTE frame structure type 1 (FDD), downlink
  • 74. LTE frame structure type 2 (TDD)
  • 75.
  • 76.
  • 77.
  • 78.
  • 80.
  • 81. SC-FDMA in comparison with OFDMA and DS-CDMA/FDE
  • 82. SC-FDMA signal generation Localized vs. distributed FDMA
  • 84. Parameters for uplink generic structure
  • 85.
  • 86.
  • 87.
  • 88. UL Physical Channel Processing
  • 89.
  • 90. Spatial Multiplexing Spatial multiplexing allows to transmit different streams of data simultaneously on the same downlink resource block(s). These data streams can belong to one single user (single user MIMO / SU-MIMO) or to different users (multi user MIMO / MU-MIMO). While SU-MIMO increases the data rate of one user, MU-MIMO allows to increase the overall capacity. Spatial multiplexing is only possible if the mobile radio channel allows it.
  • 92.
  • 94. Collaborative/Network MIMO overview Coordinate transmission and reception of signals among multiple bases. Reduces intercell interference and improves cell-edge performance and overall throughput. Collaborative MIMO : share user data and long-term noncoherent channel information. Coherent network MIMO : share user data and short-term coherent channel information.
  • 95.
  • 96.
  • 97.
  • 98.
  • 99.
  • 100.
  • 101.
  • 102.

Editor's Notes

  1. Short descriptions of the LTE interfaces [Source: ]