Post on 27-May-2015
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LTE System Modelling Tools
LTE System Modelling Tools Outline
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• LTE Introduction
• 4G-online.net Introduction
• 4G-online.net Example Use Cases (www)
• LTE MAC Lab Introduction
• LTE MAC Lab Toolbox Content (Matlab)
• LTE PHY Lab Introduction
• LTE PHY Lab Toolbox Content (Matlab)
• Q&A
LTE Introduction
LTE Introduction 3GPP Systems’ Evolution
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1997 2000 2005 2009 2011/2012
LTE LTE-Advanced
2G 3G 3.9G 3.5G 4G
1992
GPRS
2.5G
GSM UMTS HSPA
Phase 1
Phase 2
Rel. 96
Rel. 97
Rel. 98
Rel. 99
Rel. 4
Rel. 5
Rel. 6
Rel. 7
Rel. 8
Rel. 9
Rel. 10
Rel. 11
3GPP
Release
Voice only 14.4kbps UL: 128kbps
DL: 384kbps
UL: 11Mbps
DL: 28Mbps
UL: 75Mbps
DL: 325Mbps
UL: 500Mbps
DL: 1Gbps
Highest
Data Rate
LTE Introduction Goals / Requirements for LTE and SAE
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eNB
eNB
Standardization work for LTE and SAE started in December 2004
IMS/Services/ Internet/PSTN
WiMAX
EPC
GERAN/ UTRAN
cdma200
Fixed
High data rate/low latency/packet optimized RAN All IP based/flat core network architecture
LTE Goals/Requirements
• High speed (up to 350km/h)
• Low latency (below 10ms)
• Large throughputs (DL 100Mbps, UL 50Mbps)
• VoIP Capacity (200 users in 5MHz BW)
• Lower bit cost
• Flexible and scalable BW and spectrum
• Flat RAN network (only eNBs)
SAE Goals/Requirements
• Access for all NWs (interworking/global roaming)
• IMS for all NWs
• Easy migration to EPS (from 2G/3G networks)
• Flat IP network (‘always-on’ concept)
• QoS Support for all services
• Policy and charging
aGW
LTE Introduction LTE Details
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• Multicarrier Transmission: DL OFDMA, UL SC-FDMA
• Shared data channels with fast update (1ms) and multi-
layer retransmissions
• Adaptive Modulation and Coding
• Multi Antenna Transmission: DL MIMO (2 or 4 antennas)
• Scalable System BW: 1.4, 3, 5, 10, 15, 20 MHz
• Quality-of-Service on Radio Interface
Radio Interface Technologies
eNB
LTE Radio Interface
SGW
MME
eNB
eNB
PGW
HSS
Uu
Uu
S11
S6a
S5 S1-U
S1-MME
X2
Internet /
IMS ...
LTE Network
4G-online.net
4G-online.net LTE and WiMAX Analisys Tool
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• 4G-online.net is an advanced planning and analisys tool that can be used for:
• Coverage and capacity prediction
• RRM features evaluation
• Technology business casing
• Main Features:
• Standalone or Web-based
• Support for LTE and Mobile WiMAX
• All LTE and Mobile WiMAX channel bands and bandwidths
• Channel models for pathloss, shadowing, multipath
• Traffic and QoS models
• RRM functionalities: Scheduling, admission control, congestion control, link adaptation,
handover
• 2x2 MIMO schemes
• Frequency reuse schemes
• Configuration:
• MCS tables
• RRM functionalities parameters
• Environmental and propagation conditions
• Base station and terminal configuration
4G-online.net LTE and WiMAX Analisys Tool
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• Downlink and Uplink
• Multiple Mobiles and BSs
• Support for LTE and WiMAX
• Pathloss, shadowing and multipath
• Traffic and QoS models
• RRM functionalities
• Frequency reuse schemes
4G-online.net models radio network:
• scheduling
• interference
• mobility
• propagation
Main Features of the 4G-online.net:
channel
MAC
Packet Traffic
MAC
Packet Traffic
MAC
Packet Traffic
channel
eNB UE 1 … UE x
General Block Diagram of 4G-online.net
Reflects Dynamic Radio System Behavior
4G-online.net
L1: PHY L1: PHY L1: PHY
4G-online.net General Algorithm Flow
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Start
Generate channels
Generate UEs’ positions and mobility settings
t = 0
Admission control
Scheduling & Congestion control
PHY Layer abstraction and evaluation for all links
Update results and statistics
t = tend?
t = t+TTI
Stop
Update UE locations and propagation
conditions
Handovers
y
n
Traffic generation
LTE MAC Lab
LTE MAC Lab System Level Simulator
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channel
MAC
Packet Traffic
MAC
Packet Traffic
MAC
Packet Traffic
channel
LTE PHY Lab
eNB UE 1 … UE x
General Block Diagram of LTE MAC Lab
Dynamic Radio System Behavior Model
LTE MAC Lab
L1: PHY L1: PHY L1: PHY
LTE MAC Lab General Algorithm Flow
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Start
Generate channels
Generate UEs’ positions and mobility settings
t = 0
Scheduling & Link Adaptation
PHY Layer abstraction and evaluation for all links
Update results and statistics
t = tend?
t = t+TTI
Stop
Update UE locations and propagation
conditions
y
n
Traffic generation
LTE MAC Lab General Algorithm Flow
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LTE MAC Lab Architecture LTE MAC Lab Main Algorithm
LTE PHY Lab
LTE PHY LabTM E-UTRA Physical Layer Model
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MAC Layer Multipath Channel
eNB PHY TX
UE PHY RX
MAC Layer
Downlink
Uplink
General Block Diagram of LTE PHY LabTM
101010111001… 101010111001…
Comprehensive implementation of the 3GPP Rel 8 E-UTRA PHY
MAC Layer Multipath Channel
eNB PHY RX
UE PHY TX
MAC Layer
101010111001… 101010111001… UPLINK
DOWNLINK
eNB
LTE PHY Lab DL: eNB Transmitter Block Structure
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