Beyond 3G LTE Long Term Evolution
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Transcript of Beyond 3G LTE Long Term Evolution
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Beyond 3GLTE
Long Term Evolution
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Agenda
Cellular History Key Technologies 3GPP and LTE Networks Architecture
(GSM/GPRS/HSPA/LTE) Comparison Time Line of LTE
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900 MHzVoice
1G
900 MHz1800 MHzVoice/Data
2G
900-1800-1900 MHzSmart Phone
Video, Internet…
3G
2007
900-1800 MHzVoice, Camera Tiny Internet
2.5GData Rate3G+
History
Fixed NetWorks
1984-1996+
1992-1998 1999 1999-2005+
2005+
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Wireless Access Evolution
New ServicesNew Services
EfficiencyEfficiency
More Data More Data Services Services requiredrequired
Broadband
Subscribers
Voice
CoverageCoverage
MobilityMobility
Voice Voice QualityQuality
PortabilityPortability
CapacityCapacity
Data ServiceData Service
BroadbandBroadband
Network Network SimplificationSimplification
Cost of Cost of OwnershipOwnership
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FDMA, TDMA & CDMA FDMA (Frequency Division Multiple Access) Each user on a different frequency A channel is a frequency TDMA (Time Division Multiple Access) Each user on a different window period in time slot. CDMA (Code Division Multiple Access) Each user uses the same frequency all the time but
mixed with different distinguished code patterns.
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1GAnalog Digital
Voice
2G
3G+2.5G
Voice
Greater Network Capacity
Improved Voice
Quality
Data Transmissio
n
Always-On Connectivity
via Packet Data Technology
GSM
EDGE
UMTS - WCDMA/HSDPA
GPRS
1984-1996+
1992-2000+
2001
Packet Data
Multimedia
Super High Speed Data
Increased
Capacity
2002-2005+
TDMA
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Cellular GenerationFirst Generation (AMPS)
Few users , expensive , large size, and FM,FDMA
Second Generation (GSM)
Digital system, more user, improved to supply data (EDGE , GPRS). FDMA/TDMA ,GMSK
Third Generation (WCDMA)
Voice & data (CDMA),
improved to increase the speed 7Mbps(HSPDA).
WCDMA
Fourth Generation (LTE)
Super High Speed Data, Simple Network, Low Cost
OFDMA , 100 Mbps
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Key Technologies
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Two Key technologies are evolving to meet the Wireless Broadband Requirements
802.11n(smart antennas)802.11Mesh extns.
Lo
cal A
rea
Fix
ed
Wid
e A
rea
Mo
bile
Co
vera
ge/
Mo
bili
ty
Met
ro A
rea
No
mad
ic
802.16(Fixed LOS)
802.16a/d(Fixed NLOS)
802.11b/a/g
Mobile Industry
Fixed Wireless Industry
4G Air Interfaces
Data Rates (kbps)100,000 +
GSM UMTS HSPAGPRS EDGE LTE 3GPP
MOBILE BROADBAND
DSL ExperienceDial Up
Higher Data Rate / Lower Cost per Bit
802.16e(Mobile WIMAX)
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Goal of LTE/Converge Networks
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How to achieve it ?
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What is 3GPP? 3GPP stands for 3rd Generation Partnership Project It is a partnership of 6 regional SDOs (Standards Development Organizations)
These SDOs take 3GPP specifications and transpose them to regional standards
Japan
USA
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Towards LTE
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3G Technologies Overview
3GPP : UMTS Phase 1 (3GPP release 5) : HSDPA service, Phase 2 (3GPP release 6):HSUPA Uplink high-speed data Phase 3 :(3GPP release 7) HSPA+ Capacity Improvements in
UL and DL, above 10 Mbps Next-Generation Cellular System (in about 2010) (LTE)
Release 8 100 Mbps DL and 50 Mbps UL full-mobility wide area coverage 1 Gbps low-mobility local area coverage
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LTE Access
LTE radio access Downlink: OFDM Uplink: SC-FDMA
Advanced antenna solutions
Diversity Beam-forming Multi-layer transmission (MIMO)
Spectrum flexibility Flexible bandwidth New and existing bands Duplex flexibility: FDD and TDD
20 MHz1.4 MHz
TX TX
SC-FDMA
OFDMA
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Architectures’
GSM Basic Blocks GSM Voice Call GSM Data Call HSPA LTE
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GSM Architecture Overview A GSM system is made up of three subsystems:
The mobile station (MS) The Base station subsystem (BSS) The Network and switching subsystem (NSS)
The interfaces defined between each of these sub systems include:
“A” interface between NSS and BSS “Abis” interface between BSC and BTS (Within the BSS) “Um” air interface between the BSS and the MS
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MSC
OMO
PSTNFixed Network
BSC
BSC
GSM Voice Network
Only Voice Call
HSCS9.6 Kp/s
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GSM Architecture
Abis Interface
Interface
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GSM Voice and Data Call Architecture
Voice Calls Path
Data Calls Path
Packet Data14.4 Kp/s
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2G Towards 3G Networks
GGSN
IP networks
SGSN
IuGb
2G 3G
BSC
BTS
RNC
Node B
HLR
PCRFGr
Gi
Iur
Gx
Only PS Domain shown
Gn Gn
•Policy Control and Charging Rules Function (PCRF) - to manage Quality of Service (QoS) aspects
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GGSN
IP networks
SGSN
Iu CPGb
2G 3G
BSC
BTS
RNC
Node B
HLR/HSS
PCRF
Iu UP
Gr
Gi
Iur
Gx
Only PS Domain shown
Gn
Optimizing the 3G/HSPA payload plane for Broadband traffic
HSPA (Higher Speed Packet Access)
10 Mb/s
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LTE Architecture
PDN GWServing GW
MME
S1-MME S1-U
LTE
IP networks
eNodeB
SGSN
Iu CPGb
2G 3G
S3
BSC
BTS
RNC
Node B
HLR/HSS
PCRF
Iu UP
S11
Gr
S10
S6a
SGi
X2
Iur
S7
Non-3GPP access
S2a/b
S4PDN GW
Serving GW
”Gateway”
MMESGSN
”Mobility Server”
PCRF
HLR/HSS
”HLR/HSS”
EPC
eNode B
RBS
OSS
PA/DU Core & IMS
PA/DU Radio
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Main Nodes of LTE or EPC (Evolved Packet Core
· Serving GPRS Support Node (SGSN) - to provide connections for GERAN and UTRAN Networks
· Serving Gateway - to terminate the interface toward the 3GPP radio-access networks
· PDN Gateway - to control IP data services like routing, addressing, policy enforcing and providing access to non-3GPP access networks
· Mobility Management Entity (MME) - to manage control plane context, authentication and authorization
· 3GPP anchor - to manage mobility for 2G/3G and LTE systems
· SAE anchor - to manage mobility for non 3GPP RATs
· Policy Control and Charging Rules Function (PCRF) - to manage Quality of Service (QoS) aspects
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PDN GWServing GW
MME
S1-MME S1-U
LTE
IP networks
eNodeB
SGSN
Iu CPGb
2G 3G
S3
BSC
BTS
RNC
Node B
HLR/HSS
PCRF
Iu UP
S11
Gr
S10
S6a
SGi
X2
Iur
S7
Non-3GPP access
S2a/b
The PDN and Serving GW may be separate nodes in some scenarios
(S5 in-between)Only PS Domain shown
S4
From 3GPP to LTE/SAE
PDN Gateway - to control IP data services like routing, addressing, policy enforcing and providing access to non-3GPP access networks
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+ True high-speed mobile data
+ Full-motion HD video anywhere
+ Stream any content
+ Mobile peer2peer & Web 2.0
(Networking)
+ Triple play
EDGE
EVDO-AHSDPA
LTEFiber
ADSL-2+
ADSL
Mbps
40-100MbpsFiber like speed on mobile
Comparison with Speed
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+ Spectral efficiencyBetter utilization of spectrum available
+ Low frequency, Advanced Receivers and Smart AntennaFor improved coverage and reduced cost of ownership
+ Increased CapacityMuch higher user and sector throughput for lower individual cost service delivery
+ Simpler RAN, IP Core & Centralized service deliveryFewer nodes & interfaces (Node-B/RNC/Gateway) One Network & IMS for all access technologies
+ Connect to legacy coresExisting network asset investment protection
+ 3GPP/2 Market tractionEconomy of scale
LTE VoIP cost*
UMTS rel.99 voice call cost$
10%
3GPP subscribers 85% market share
Predicted LTE VoIP voice call cost* - Sound Partners Limited Research
Comparison Cost
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10-5msec latencyHighly Responsive Multimedia
+ Improved user experience
+ Fast VoIP call set-up
+ Instantaneous web pages
+ Streaming fast buffering
+ Online mobile gamingEDGE
EVDO-AHSDPA
LTEFiber
ADSL-2+
ADSL
Compassion Responsive
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LTE Time Line
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3G- R’993G- R’99HSPAHSPA
HSPA EvolutionHSPA Evolution
LTELTE
2002 2005 2008/2009 2009
384 kbps 3.6 Mbps 21/28/42 Mbps ~150 MbpsPeak rate
2007
7/14 Mbps
Mobile broadband speed evolution
LTE EvolutionLTE Evolution
2013
1 Gbps
Target
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Thanks