lte demystified
Post on 24-Nov-2015
44 Views
Preview:
DESCRIPTION
TRANSCRIPT
-
LTE DemystifiedWhat is LTE and how does it work?
All material is Copyright Informa Telecoms & Media
-
Agendaz Intro to Broadband Concepts
Defining Broadband and Broadband Servicesz LTE Technology
LTE Features and Performance LTE Architecture LTE Radio Interface MIMO LTE Services and Voice Evolution Option to LTE Spectrum for LTESpectrum for LTE Deployment Benefits of LTE Q&A
3
Q&A
-
Introduction to Broadband Why is Wireless Broadband so important?
All material is Copyright ' Informa Telecoms & Media
-
Wireless Broadband Requirements
z Increasing Smartphone and don gle usa ge
5
g g gz More data applications available
-
Data is booming, but
1700%)Global data revenue and traffic growth, 2008r2013
1300%1500%1700%
8
=
1
0
0
%
)
900%1100%
%
w
t
h
(
2
0
0
8
RevenueTraffic
500%700%
b
a
s
e
d
g
r
o
w
100%300%
2008 2009 2010 2011 2012 2013
R
e
b
2008 2009 2010 2011 2012 2013
z More efficient technologies required to reduce the cost per bit
6
z Candidate technologies are HSPA+ and LTE (or WiMAX?)
-
Typical Broadband Services
Messaging and Social Networking
telemetry and remote control
Messaging and Social Networking
Internet Connection
TV, VoD, Radio
Voice (VoIP)Voice (VoIP)Application Stores
7 Cloud Computing
-
Wireless Technology Evolution
LTE
TACS, NMT, AMPSVoice only
GSM, CDMA, UMTS, cdma2000
LTESuper Fast Data
4G?
LTE Advanced ?TDMAVoice, Data, Text
GPRS EDGE
UMTS, cdma2000Packet data, Multimedia
HSDPA HSUPA
Ultra Fast Data
8
GPRS, EDGEPacket data
HSDPA, HSUPAFaster Data
-
LTE TechnologySo what is Long Term Evolution?
All material is Copyright ' Informa Telecoms & Media
-
Long Term Evolution LTE
LTE: - a new cellular radio standardallowing faster, more efficient transferof data enabling the next generationof data, enabling the next generation of mobile data services
z All new All IP, Mobile Wireless Broadband Networkz LTE is part of 3GPP evolutionz LTE is part of 3GPP evolutionz Can we call LTE 4G? Do people care?
10
-
Mobile Technology Evolution LTE has evolved from early GSM technology Development was started by the European Telecom Standards Institute (ETSI) Development is now managed by 3 rd Generation Partnership Project (3GPP)
LTE i f R l 8 f h S ifi i LTE is part of Release 8 of the Specifications
GSM Phase 1Basic Voice
1991
GSM Phase 2+New Voice Codec
Further Optimizations
GSM Phase 2+R97/98
More GPRSEDGE1997
R4Core Network
Soft switch2000
R6HSUPAALL IP
R8LTE
R10LTE Advanced?
20121991 1995 1997 2000 2004 2008 2012
1993 1996 1999 2002 20061993GSM Phase 2Txt Messages
Basic Data
1996GSM Phase 2+
Release 96GPRS
1999R99
UMTS Radio Network
2002R5
HSDPAIMS
2006R7
HSPA+
2010R9
LTE Enhancements
11
-
LTE PerformanceD t R t & B d idthz Data Rates & Bandwidth
z 3 4 times more capacity than HSxPA Release 6z 100 300Mbpsz 100 300Mbps
z Less time spent downloading content, LTE is a lot fasterz Greater number of mobiles connected to the network, Higher Capacity
D l (L t )z Delay (Latency )z 3 4 times less delay than HSxPA Release 6z 100mS Connection Setupz 100mS Connection Setupz 5 20mS roundtrip delay
z Much more responsive web browsingB tt i IP fz Better voice over IP performance
z Other LTE Benefits z Advanced Antenna technologies increase capacityg p yz Advanced Antenna technologies increase cell sizez All IP (packet data) network for faster, more efficient services
LTE I t k ith i ti GSM/UMTS t k
12
z LTE can Interwork with existing GSM/UMTS networksz LTE supports multimedia broadcasting
-
LTE Data Performance, DownloadingTypical 3 5 minute YouTube clip
5 Megabytes of information
GPRS @ 40Kb 125GPRS @ 40Kbps 125s
EDGE GPRS @100Kbps 50sEDGE GPRS @100Kbps 50s
UMTS @ 384Kbps 13s
HSPA @1Mbps 5s average user data rate
LTE @ 5Mbps 1s average user data rate
13
-
LTE Architecture (high level)New Access NetworkBase Station - Evolved Node BX2 interface for improved Handover and Interference ManagementBackhaul Connections are Critical CapacityBackhaul Connections are Critical, Capacity
Downlink Radio InterfaceOrthogonal Frequency Division Multiple Access (OFDMA)Improved Performance in Urban AreasMultiple In Multiple Out (MIMO)
Uplink Radio InterfaceUplink Radio InterfaceSingle Carrier Frequency Division Multiple Access (SC-FDMA)Good Urban Area PerformanceDesigned for Good Battery Life
eNB eNBX2eUTRAN UE
14eNB Evolved Node B;MME Mobility Management Entity; SGW Serving GatewayP-GW Packet Data Gateway UE User Equipment
-
MME d SGW PGW
LTE Architecture (high level)New Core Network Evolved Packet Core All IP for efficiency New Network Elements Designed to be Flexible and
MME and SGW Mobility Management Entity
Overall control of the UE and Data Sessions Handle Handovers and
PGW Packet Gateway
provides connection to external networks internet, IMS, WAP, MMS
Designed to be Flexible and Scalable Self Organising Network (SON)
Handle Handovers and Location Management
Serving Gateway Handles User Data Controlled by the MME
internet, IMS, WAP, MMS Manages the IP session for the User Equipment
SGWPGW S5 S1 USGWPGW
S11
S5 S1-U
eNB eNBX2eUTRAN UE
EPCAll IP
All New
MMES1-MME
15eNB Evolved Node B;MME Mobility Management Entity; SGW Serving GatewayP-GW Packet Data Gateway UE User Equipment
-
LTE Architecture (high level)InterworkingDefined interfaces for interworkingUMTS/GPRS interworkingWiFi/WiMAX I t kiWiFi/WiMAX InterworkingInterworking with Trusted/non-Trusted
UMTSWLAN
S3 S4 S12S2
SGWPGW S5 S1 U
S3,S4,S12S2
SGWPGW
S11
S5 S1-U
eNB eNBX2eUTRAN UE
EPCAll IP
All New
MMES1-MME
16eNB Evolved Node B;MME Mobility Management Entity; SGW Serving GatewayP-GW Packet Data Gateway UE User Equipment
-
LTE Architecture (high level)Connection to External NetworksIMS, MMS, WAP, Media Centers
IMS
SGi UMTSWLAN
S3 S4 S12S2
SGWPGW S5 S1 U
S3,S4,S12S2
SGWPGW
S11
S5 S1-U
eNB eNBX2eUTRAN UE
EPCAll IP
All New
MMES1-MME
17eNB Evolved Node B;MME Mobility Management Entity; SGW Serving GatewayP-GW Packet Data Gateway UE User Equipment
-
LTE Radio Interface OverviewKey FeaturesKey Features
z Flexible Bandwidth Options1 4 20 MHz 1.4 20 MHz
z High Order Modulation and Codingz QPSK, 16 QAM and 64 QAMQ S , 6 Q a d 6 Qz Adaptive modulation and coding
z Robust OFDMA in the DownlinkC
eNBeNBeNB
z Multi-Carrier Transmissionz Good Multipath Performancez Suited to Advanced Antenna Techniques
z Efficient SC-FDMA in the Uplinkz Still good Multipath Performancez Decoding complexity in the eNB UEz Decoding complexity in the eNBz More power efficient than OFDMA
z Advanced Antenna Support
UE
19
z MIMO, 2x2, 4x4z Beamforming
-
LTE Radio Interface OverviewOFDMA and SC FDMAOFDMA and SC-FDMA
y
12 Sub-Carriers/RB
F
r
e
q
u
e
n
c
y
F
r
e
q
u
e
n
c
y
Good Multipath Performance Simplified UE Receiver Scalable OFDMA Supports MIMO
Time
Supports MIMO
eNBeNBeNB UEc
y
F
r
e
q
u
e
n
c
y
F
r
e
q
u
e
n
c
Single Carrier /RB Simplified UE Design
20
Time
Lower power Consumption No MIMO
-
LTE Radio Interface OverviewMIMOMIMO
eNBeNBeNB UE
Downlink only 2 or 4 Transmit antennas at
the base station
Spatial Multiplexing increases data rate
Up to 4x increase in Capacity*
21
2 or 4 Receive antennas at the UE
Requires an Urban Environment
Wont work every where
top related