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Asset Tool User for LTE
by Ishan Marwah
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LTE Frequency Bands
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Supported Channels (non-overlapping)E-UTRA
Band
Downlink
Bandwidth
Channel Bandwidth (MHZ)
1.4 3 5 10 15 20
1 60 - - 12 6 4 3
2 60 42 20 12 6 4* 3*
3 75 53 23 15 7 5* 3*
4 45 32 15 9 4 3 2
5 25 17 8 5 2* - -
6 10 - - 2 1* X X
7 70 - - 14 7 4 3*
8 35 25 11 7 3* - -
9 35 - - 7 3 2* 1*
10 60 - - 12 6 4 3
11 25 - - 5 2* 1* 1*
12 18 12 6 3* 1* - X
13 10 7 3 2* 1* X X
14 10 7 3 2* 1* X X
...
33 20 - - 4 2 1 1
34 15 - - 3 1 1 X
35 60 42 20 12 6 4 3
36 60 42 20 12 6 4 3
37 20 - - 4 2 1 138 50 - - 10 5 - -
39 40 - - 8 4 3 2
40 100 - - - 10 6 5
* UE receiver sensitivity can be relaxed
X Channel bandwidth too wide for the band
- Not supported
LTE Frequency Bands
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E-UTRA
Band
Bandwidth
UL (MHz)
E-ARFCN
UL
Bandwidth
DL (MHz)
E-ARFCN
DL
Duplex
Mode
1 1920-1980 13000
13599 2110-2170 0
599 FDD2 1850-1910 13600 14199 1930-1990 600 - 1199 FDD
3 1710-1785 14200 14949 1805-1880 1200 1949 FDD
4 1710-1755 14950 15399 2110-2155 1950 2399 FDD
5 824-849 15400 15649 869-894 2400 2649 FDD
6 830-840 15650 15749 875-885 2650 2749 FDD
7 2500-2570 15750 16449 2620-2690 2750 3449 FDD
8 880-915 16450 16799 925-960 3450 3799 FDD
9 1749.9-1784.9 16800 17149 1844.9-1879.9 3800 4149 FDD
10 1710-1770 17150 17749 2110-2170 4150 4749 FDD
11 1427.9-1452.9 17750 17999 1475.9-1500.9 4750 4999 FDD
12 698-716 18000 18179 728-746 5000 5179 FDD
13 777-787 18180 18279 746-756 5180 5279 FDD
14 788-798 18280 18379 758-768 5280 5379 FDD
...
33
1900-1920 26000 26199 1900-1920 26000 26199 TDD
34 2010-2025 26200 26349 2010-2025 26200 26349 TDD
35 1850-1910 26350 26949 1850-1910 26350 26949 TDD
36 1930-1990 26950 27549 1930-1990 26950 27549 TDD
37 1910-1930 27550 27749 1910-1930 27550 27749 TDD
38 2570-2620 27750 28249 2570-2620 27750 28249 TDD
39 1880-1920 28250 28649 1880-1920 28250 28649 TDD
40 2300-2400 28650 29649 2300-2400 28650 29649 TDD
LTE Frequency Bands
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Frame Structures
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LTE Frame Structure
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Frame Structures -TDD
0 1 2 3 19
10 ms
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Frame Structures -TDD
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Frame Structures -FDD
0 1 2 3 19
One Sub-frame = 1 mS
10 ms
In half-duplex FDD operation, the UE
cannot transmit and receive at the same
time, while there are no such restrictions in
full-duplex FDD
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Frame Structures - FDD
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LTE Carriers
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LTE CarriersSupported Channels (non-overlapping)
E-UTRA
Band
Downlink
Bandwidth
Channel Bandwidth (MHZ)
1.4 3 5 10 15 20
1 60 - - 12 6 4 3
2 60 42 20 12 6 4* 3*
3 75 53 23 15 7 5* 3*
4 45 32 15 9 4 3 2
5 25 17 8 5 2* - -6 10 - - 2 1* X X
7 70 - - 14 7 4 3*
8 35 25 11 7 3* - -
9 35 - - 7 3 2* 1*
10 60 - - 12 6 4 3
11 25 - - 5 2* 1* 1*
12 18 12 6 3* 1* - X
13 10 7 3 2* 1* X X
14 10 7 3 2* 1* X X
...
33 20 - - 4 2 1 1
34 15 - - 3 1 1 X
35 60 42 20 12 6 4 3
36 60 42 20 12 6 4 3
37 20 - - 4 2 1 1
38 50 - - 10 5 - -
39 40 - - 8 4 3 2
40 100 - - - 10 6 5
* UE receiver sensitivity can be relaxed
X Channel bandwidth too wide for the band
- Not supported
Bandwidth
(MHz)1.4 3 5 10 15 20
# of RBs 6 15 25 50 75 100
Subcarriers 72 180 300 600 900 1200
Since the appropriate LTE Frequency
Band and LTE Frame Structure havebeen selected or defined then the
Carriers can be defined
Assign Carrier to Frequency Band
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LTE Carriers
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LTE Carriers
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E-UTRA
Band
Bandwidth
UL (MHz)
E-ARFCN
UL
Bandwidth
DL (MHz)
E-ARFCN
DL
Duplex
Mode
1 1920-1980 13000 13599 2110-2170 0 599 FDD
LTE Carriers
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10
Mhz
10mhz
LTE Carriers
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Bandwidth (MHz) 1.4 3 5 10 15 20
# of RBs 6 15 25 50 75 100
Subcarriers 72 180 300 600 900 1200
LTE - Carriers
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R0
R0
R0 R0
R0
R0
R0
R0
R0
R0
R0 R0
R0
R0
R0
R0
R0
R0
R0 R0
R0
R0
R0
R0
R0
R0
R0 R0
R0
R0
R0
R0
LTE Carriers
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R0
R0
R0 R0
R0
R0
R0
R0
R
1
R
1
R
1
R
1
R
1
R
1
R
1
R
1
Configuration of
Carrier-2 antenna
LTE Carriers
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Downlink reference
signal structure
The downlink reference
signal structure is
important for channel
estimation.
The principle of the
downlink reference
signal structure for 1
antenna.
Ref Signal TX1 = 8 for
15Khz spacing
R0
R0
R0 R0
R0
R0
R0
R0
Specific pre-defined resource elements (indicated
by R0-3 in in the time-frequency domain) are
carrying the cell-specific reference signal
sequence.
Configuration of Carrier - 1 Antenna
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Downlink reference
signal structure
The downlink
reference signal
structure is important
for channel estimation.The principle of the
downlink reference
signal structure for 2
antenna.
Ref Signal TX2= 16 for
15Khz spacing
R0
R0
R0 R0
R0
R0
R0
R0
R1 R1
R1
R1 R1
R1 R1
R1
Specific pre-defined resource elements (indicated by
R0-3 in in the time-frequency domain) are carrying
the cell-specific reference signal sequence.
Configuration of Carrier- 2 Antennas
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Downlink reference
signal structure
The downlink
reference signal
structure is important
for channelestimation.
The principle of the
downlink reference
signal structure for 2
antenna.
Ref Signal TX3= 20
for 15Khz spacingSpecific pre-defined resource elements (indicated by
R0-3 in in the time-frequency domain) are carrying
the cell-specific reference signal sequence.
Configuration of Carrier- 3 Antennas
R0
R0
R0R0
R0
R0
R0
R0
R1 R1
R1
R1 R1
R1 R1
R1
R2
R2
R2
R2
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FDD Frame Structures UL
Type1-FDD- Uplink
UL Contro l Channel
PUCCH transmission in one subframe is compromised of
single PRB at or near one edge of the system bandwidth
followed by asecond PRB at or near the opposite edge of
the bandwidth
PUCCH regions depends on the system bandwidth. Typicalvalues are1, 2, 4, 8and16for1.4, 3, 5, 10 and20 MHz
UL Sign als(S-RS & DM RS)
S-RS estimates the channel quality required for the UL
frequency-selective scheduling and transmitted on 1symbol
ineachsubframe
DM-RS is associated with the transmission of UL data on
the PUSCH and\or control signalling on the PUCCH
Mainly used for channel estimation for coherent
demodulation
Transmitted on 2symbols in eachsubframe
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Type1 - UL Frame
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Setting the Overhead Parameters After you have set the frequency parameters in the LTE Carriers dialog box,
you can set the parameters on the Overhead tab. This tab enables you todefine the associated fixed and variable signalling and control channeloverhead of each carrier.
LTE Frames are two-dimensional (time and frequency) entities, containingvarious signalling and control channels. Each of these signals/channelsoccupy a certain amount of Resource Elements (REs) in both the uplink anddownlink. In the downlink, the amount of occupied resources for certainchannels also depends on the number of transmit antennas deployed.
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Site Data Base
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ECGI
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Bearers
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LTE Bearers
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The Default Uplink and
Downlink LTE bearersare defined per CQI
providing 15 DL
bearers and 4 UL
bearers.
CQI is a report sent
from the UE to the
eNodeB suggesting
the appropriate
Modulation and
Coding to be used by
the eNodeB.
Downlink
Uplink
LTE Bearers
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Channel Quality Indicator Reporting
CQI Report
PUSCH PUCCH
PDSCH
The UE may not have
PUSCH resources
CQI Modulation Actual
coding rate
Required
SINR
1 QPSK 0.07618 -4.46
2 QPSK 0.11719 -3.75
3 QPSK 0.18848 -2.55
4 QPSK 308/1024 -1.15
5 QPSK 449/1024 1.75
6 QPSK 602/1024 3.65
7 16QAM 378/1024 5.2
8 16QAM 490/1024 6.1
9 16QAM 616/1024 7.55
10 64QAM 466/1024 10.85
11 64QAM 567/1024 11.55
12 64QAM 666/1024 12.75
13 64QAM 772/1024 14.55
14 64QAM 873/1024 18.15
15 64QAM 948/1024 19.25
Each default Bearers has
Control & Traffic SINR
requirements according to
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15 Default
Bearers
CQI Modulation Actual
coding rate
Required
SINR
1 QPSK 0.07618 -4.46
2 QPSK 0.11719 -3.75
3 QPSK 0.18848 -2.55
4 QPSK 308/1024 -1.15
5 QPSK 449/1024 1.75
6 QPSK 602/1024 3.65
7 16QAM 378/1024 5.2
8 16QAM 490/1024 6.1
9 16QAM 616/1024 7.55
10 64QAM 466/1024 10.85
11 64QAM 567/1024 11.55
12 64QAM 666/1024 12.75
13 64QAM 772/1024 14.55
14 64QAM 873/1024 18.15
15 64QAM 948/1024 19.25
Channel Quality Indicator Reporting
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Bearers
S is the average
received signalpower, I is the
average interference
power, and N is the
noise power.
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TDD
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TDD
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Uplink Bearers
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Uplink
UL 16QAM
UL 64QAMSINR=+12.75
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Uplink
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Limiting the Service Area
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MIMO
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Single User MIMO Principle4 Closed-loop spatial multiplexing
Here the UE reports both the RI and index of the preferred pre-coding matrix.
Rank Indicator (RI) is the UEs recommendation for the number of layers, i.e.
streams to be used in spatial multiplexing. RI is only reported when the UE is
operating in MIMO modes with spatial multiplexing
Spatial Multiplexing does
increase throughput butthis comes at an expense
of higher SINR
requirements as shown on
the LTE bearers
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Multi User MIMO
MU-MIMO is used to
increase the cells
throughput.
This is achieved byco-scheduling
terminals on the same
Resource Blocks.
Spatial Multiplexing does increase throughput but this comes at the
expense of higher SINR requirements, as shown on the LTE bearers
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Multi User MIMO
Applying MU-MIMO
will make no obviouschanges to a network
unless it is overloaded
In order for MU-MIMOto be used, there is a
higher Traffic &
Control SINR
requirement defined
Spatial Multiplexing does increase throughput but this comes at the
expense of higher SINR requirements, as shown on the LTE bearers
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Single User MIMO Principle
SU-MIMO Tx DiversitySU-MIMO
+22dB DLRS SNR
Roughly speaking, Diversity is used to
improve coverage
This is the coverage area
for SU-MIMO
Spatial Multiplexing
does increasethroughput but this
comes at the
expense of higher
SINR requirements
as shown on the
LTE bearers
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Cell in Site Database(AAS Settings tab)
Look-Up Table(Tab Name)
Clutter Parameters(Column name)
MIMO SINR DeltaOffset on Bearer
How a Simulation of NetworkPerformance is Affected
SU-MIMO - Diversity(downlink)
DL SD SINRAdjustment
DL SD SINRAdjustment
- Required DL SINR is dividedby thecorresponding table value.*
SU-MIMO - Diversity(uplink)
UL SD SINRAdjustment
UL SD SINRAdjustment
- Required UL SINR is dividedby thecorresponding table value.*
SU-MIMO - Multiplexing(downlink)
DL SM Rate Gain DL SM Rate GainAdjustment
- Achievable User Data Rate is multipliedby the corresponding table value.*
- DL SM SINR Offsets SINR Delta for SU-MIMO
Required SINR is adjusted by thespecified delta value.*
SU-MIMO - Multiplexing(uplink)
UL SM Rate Gain UL SM Rate GainAdjustment
- Achievable User Data Rate is multipliedby the corresponding table value.*
- UL SM SINR Offsets SINR Delta for SU-MIMO
Required SINR is adjusted by thespecified delta value.*
SU-MIMO - AdaptiveSwitching (uplink and/or
downlink)**
All or any of the above, depending on channel conditions, and/or the cell-specific thresholds, if enabled.
MU-MIMO (uplink and/ordownlink)** - DL MU-MIMO SINROffsets and
UL MU-MIMO SINROffsets
SINR Delta for MU-MIMO The number of served terminals isincreased by the factor specified in theAverage Co-scheduled Terminals.
Also, Required SINR is adjustedby thespecified delta value on the bearer.*
How AAS Support Affects Simulations
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AAS Settings in Site DB
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Enabling AAS Support for LTE Cells MU-MIMO Support
This is an example of the MU-MIMO settings:
For the downlink and/or uplink, you can set the Average
Co-scheduled Terminals, a factor that can increase thenumber of served terminals.
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How do we set this up in ASSET?
B LTE P t
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Bearers - LTE Parameters
SU-MIMO DiversitySU-MIMO
+22dB
Above this threshold
switch to SU-MIMO
Below this threshold
switch to SU-MIMO
Diversity
If enabled
DL T i i M d
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DL Transmission Mode
Switches on DLRS SNR
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Services
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Introduction
QoS differentiation (i.e. prioritisation of different services
according to their requirements) becomes extremely
important when the system load increases
The most relevant parameters of QoS classes are:
Transfer Delay
Guaranteed Bit rate
Delay sensitive QoS Classes have guaranteed bit rate
requirements.
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Services
When running a simulation,
ASSET first attempts to servethe GBR demands of both
Real Time and Non-Real Time
services, taking into account
the Priority values of the
different services.
Resources are first allocated to
the service with the highest
priority, and then to the next
highest priority service, and so
on.
Allocation and Retention Priority (ARP)
If resources are still available after the GBR demands have been met, then
different scheduling algorithms can be employed to attempt to serve the MBR of
real time services.
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LTE QoS
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LTE Services Bearer Selection Method
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ServicesWhen running
a simulation,
ASSET first
attempts to
serve the GBR
demands of
both Real Time
and Non-Real
Time services,
taking into
account the
Priority values
of the different
services.
After defining the General Service Parameters one or more Carriers can be related
to the Service. Since a supporting Carrier has been assigned to the Service, all UL
and DL Bearers will be available for selection as the Supporting Bearers.
No carrierdefined OR
BEARER
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Services
A Minimum Bit Rate (Min-GBR) and a Maximum Bit Rate (Max-MBR) have beenspecified for the service.
If a terminal achieves connection to one or more of the available bearers, the
eNodeB will firstly allocate enough resources to it in order to achieve Min-GBR.
It will keep allocating more resources to it until the terminal either reaches theMax-MBR ceiling, or until there not more resources available due to cell loading.
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The Default Uplink and Downlink LTE bearers are defined per CQI providing 15 DL
bearers and 4 UL bearers.
The most preferable bearer is DL-CQI-15 and the least preferable bearer is DL-CQI-1
LTE Bearers
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Services
The Default Uplink and Downlink LTE
bearers are defined per CQI providing 15
DL bearers and 4 UL bearers
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Services
The Default Uplink and Downlink LTE
bearers are defined per CQI providing 15
DL bearers and 4 UL bearers
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Services
After defining the General Service Parameters, one or more Carriers can be
related to the Service. Since a supporting Carrier has been assigned to the
Service, all UL and DL Bearers will be available for selection as the Supporting
Bearers.
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TerminalTypes
Terminal Types
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Terminal Types
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Terminal Types
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Terminal Types
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Traffic Raster
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Packet Scheduler
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Packet Scheduler
d bi h d l
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UE 1 Data
sent
UE 2 Data
sent
UE 1
UE 6
UE 5
UE 4
UE3
UE 2
UE 3 Data
sent
UE 4 Data
sent
UE 5 Data
sent
UE 6 Data
sent
UE 1 Data
Request
UE 2 Data
Request
UE 3 data
Request
UE 4 Data
Request
UE 5 Data
Request
UE 6 Data
Request
NodeB Packet
Scheduler
Round Robin Scheduler
NodeB Buffers
The aim of this
scheduler is to
share the
available/unusedresources equally
among the RT
terminals
The Round Robin approach is completely
random, as it simply allocates the same
resources to all terminals in turns
P i l F i
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Proportional Fair
If resources are still available after GBR demandshave been met:
Terminals with higher data rates get a larger
share of the available resources Each terminal gets either the resources it needs
to satisfy its RT-MBR demand or its weightedportion of the available/unused resources,whichever is smaller
P ti l D d
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Proportional Demand
The aim of this scheduler is to allocate the remaining
unused resources to RT terminals in proportion to their
additional resource demands.
If resources are still available after the GBR demands have
been met:
Proportional Demand completely ignores RF conditions
M SINR
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Max SINR
Terminals with higher bearer rates(and consequently higher SINR) are preferred
over terminals with lower bearer rates (and consequently lower SINR).
This means that resources are allocated first to those terminals with better
SINR/channel conditions, thereby maximising the throughput.
where S is the average received signal
power,
I is the average interference power,
and N is the noise power.
Best RF conditions are served first.
M SINR
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Max SINR
Own-signal interference in LTE an occur due to :
Inter-symbol interference due to multipath power exceeding cyclic prefixlength
Inter-carrier interference due to Doppler spread (large UE speed)
In LTE, orthogonality is often assumed unity for simplicity:
a = 1 is assumed for LTE and hence Iown = 0.
where S is the average received signal
power,
I is the average interference power,
and N is the noise power.
Best RF conditions are served first.
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Simulating Network Performance
M t C l B d Si l ti
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Monte Carlo-Based Simulation
When simulating network performance, ASSET uses MonteCarlo algorithms, which can provide a good balancebetween accuracy and usability.
The Simulator can be used as Full simulation, withrandomised snapshots, or Simulation without snapshots.
With full simulation, the performance of the network canbe analysed over a series of randomised snapshots, inwhich specified densities of user terminals are positioned instatistically determined locations. The ability of eachterminal to make its connection to the network iscalculated through an iterative process. The performanceof the network is then analysed from the averaged results.
Si l ti ith S h t
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Simulation with Snapshots
Takes a large number of randomised snapshots of network performance for
different terminals over time
In these snapshots, the UEs are in statistically determined positions andgenerated independently for each snapshot
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Simulation with Snapshots
Terminal count in a pixel is determined using a Poisson distribution with a
mean given by the number of terminals in the traffic array At the start of the snapshot, the mobile and cell powers are initialised to
zero to initialise the noise on the uplink and downlink
Other parameters, such as power control error, are set randomly on UE The first terminal in the list is tested for failure conditions. If it does not fail,
then its Tx power and the Tx power of the cells to which it is connected, aremodified. The next terminal in the list is then tested for failure conditions,and so on.
When the entire list has been tested, the simulator returns to the firstterminal and repeats the process until convergence is reached
When convergence is reached, the results of the snapshot are appended tothe results of the overall simulation. The simulation moves on to the nextsnapshot
When the simulation has completed all the specified snapshots, you canview your results using the arrays or view a summary of the data or reports
LTE Sim lato Wi a d
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LTE Simulator Wizard
Choose yourspecified output
Simulation without Snapshots
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Simulation without Snapshots
If you run a simulation without running snapshots (static analysis),you must ensure that the cell loading parameters for thecells/sectors have been specified in the Site Database
The parameters are set on the Cell Load Levels subtab, under LTEParams tab
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Auto Setup Option
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Auto Setup OptionMake the required selections for EXCLUSION from the output arrays.
Customised Output
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Customised Output
Simulation Best RSRP
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Simulation Best RSRP
Simulation RSRQ
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Simulation RSRQ
Simulation Report
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Simulation Report
Simulation Cell Centre / Cell Edge
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Simulation Cell Centre / Cell Edge
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Simulation DL RS SINR
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Simulation DL RS SINR
Simulation DL Transmission Mode
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Simulation DL Transmission Mode
Pixel Analyser
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The Pixel Analyser visualises detailed signal strength informationthat has been accumulated during a simulation.
Information about Simulated Terminals
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The aim of this feature is to provide the user with a set of arrays thatshow the locations of terminals generated by the simulation snapshots,
and to show whether the terminals succeeded or failed to make aconnection. The following arrays are provided for each terminal typeused in the simulation.
Terminal Info: Failure Rate
Terminal Info: Failure Reason
Terminal Info: Speed
The arrays are only available in simulations that run snapshots, andwhere the user has checked the Allow Terminal Info Arrays box on the
2nd page of the simulation wizard.
Information about Simulated Terminals
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o a o a ou u a ed e a s
Failure Reason array.
1 snapshot
Failure Reason array.500 snapshots
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PCI Planning
Introduction to PCI planning
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Physical layer Cell Identity (PCI) identifies a cell within a network equivalent of UMTS scrambling code
There are 504 Physical Layer Cell Identities compared to 512 UMTS scrambling codes PCI are organised in 168 groups of 3 codes compared to 64 groups of 8 for UMTS scrambling codes
Physical layer Cell Identity = (3 Group(0 to 167)) + Code 0-2
Id = 5
Id = 4
Id = 3
Id =
11
Id =
10
Id = 9
Id = 8
Id = 7
Id = 6
Id = 2
Id = 1
Id = 0
Cluster Group
Physical Cell Identity (PCI)
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LTE PCI Schemas
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LTE PCI Schemas
PCI planner
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PCI planner
Fixed
This is a constant re-use distance from a cell, within which the planner will trynot to assign the same PCI
AutomaticThis is a variable re-use distance from a cell, within which the will try not to assignthe same PCI
In PCI planner you can specify a re-use distance from any cell which the
planner will try not to assign the same PCI. Two methods:
Physical layer Cell Identity
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Physical layer Cell Identity = (3 Group(0 to 167)) + Code 0-2
= (3 x 2) + 2 =8
Group(0 to 167)
Code (0-2)
Minimising Groups.
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Minimising Groups.
Group =0
Code =0
PCI=0
Group =0
Code =1
PCI=1
Group =0
Code =2
PCI=2
Group =1
Code =0
PCI=3
Group =1
Code =1
PCI= 4
Group =1
Code =2
PCI= 5
Carrier
1
Carrier 1Carrier 1
Physical layer Cell Identity = (3 Group(0 to 167)) + Code 0-2
PCI=0
PCI=1PCI=2
Carrier
1
Carrier 1Carrier 1
PCI=3
PCI=5PCI=4
ONLY TWO
GROUPS USED
PCI GROUP
CODE
CELLSPECIFIC
FREQ SHIFTFrequency shifts
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FREQ SHIFT
0 0 0 0
1 0 1 1
2 0 2 2
3 1 0 3
4 1 1 4
5 1 2 5
6 2 0 0CELL SPECIFIC FREQ SHIFTThis determines the DLRS pattern (timefrequency positions)
q y
PCI=0 PCI =0
PCI =0 PCI =6
PCI =1 PCI =7
PCI
=0
PCI
=0
Minimising Groups.
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Minimising Groups.
Physical layer Cell Identity = (3 Group(0 to 167)) + Code 0-2
Group=0Code=0
PCI=0
Group=0Code=1
PCI=1
Group=0Code=2
PCI=2
Group=1Code=0
PCI=3
Group=1Code=1
PCI= 4
Group=1Code=2
PCI= 5
Carrier
1
Carrier 1Carrier
1
PCI=0
PCI=1
PCI=2
Carrier
1
Carrier 1Carrier
1
PCI=3
PCI=5
PCI=4
PCI GRO
UP
CO
DE
CELL
SPECIFICFREQ SHIFT
0 0 0 0
1 0 1 1
2 0 2 2
3 1 0 3
4 1 1 4
5 1 2 5
6 2 0 0CELL SPECIFIC FREQ SHIFT
This determines the DLRS pattern (timefrequency positions)
FREQ SHIFT
=0
FREQ SHIFT
=1
FREQ SHIFT
=2
FREQ SHIFT
=3
FREQ SHIFT
=4
FREQ SHIFT
=5
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Using a planning tool Very poor DLRS SINR
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Using a planning tool Very poor DLRS SINR
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Thank You
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