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Advanced LTE Planning Tool

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by

mohamed mahdy

on 24 August 2014

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Transcript of Advanced LTE Planning Tool

A
dvanced
L
TE
P
lanning
T
ool

T
eam Memebers

A
hmed Salah Mohamed
K
arim Mamdouh Rajab
M
ohamed Mohamed Mahdy
M
ohamed Saed Hassan
M
ostafa Elsayed Fawzy

What is
LTE
?

LTE => Long Term Evolution
LTE is the next generation of the mobile broad band technology
Data rate of 100 Mbps
It's the next level after UMTS (3G) technology
Mobile
G
enerations
Objective
We designed a tool by using C# language has the ability to calculate the actual number of cell to cover a certain area by LTE technology, using two algorthims for Ericsson technology, one for capacity & the other for coverage.
Outlines
LTE Technology
LTE Planning
Tool Presentation
S
upervised By:
P
rof.
D
r.
T
alaat Elgarf
LTE
Targets
Spectral efficiency 2 to 4 times times more than HSPA technology (release 6).
Peak rates exceed 100 Mbps in downlink & 50 Mbps in uplink.
Decrease the latency comparing to 3G technology
Throughput according to shannon's theory:-
C = B log2 (1+SNR)
MIMO
OFDMA
Adaptation Modulation
L
atency
H
andover
LTE Technical
Spec
ifications
Network service
A
rea

LTE Network
Arch
itecture
Network
Framing
P
lanning
P
rocess

SC-FDMA
Collect information.
Standard of living.
Expected Traffic.
Dimension of site.
LTE Planning
Project Phases
Studying coverage
&
Capacity dimensioning
Developing
LTE
Dimensioning Tool
1.Coverage dimensioning in UL&DL
2.Capacity dimensioning methods:

Method1
Modulation Based

Method2
System Interference Based

Method3
Cell Rings Based
Start
LTE
Dimensioning
Link Budget
Calculations
MAPL(Max Allowed Path loss)
Propagation Model
Calculate Cell Radius
&
Site Count
END
UPLINK Coverage
Cell Area
Cell Radius
Cell Throughput
Factors affecting maximum cell throughput:
Max. Cell Throughput
Interference Margin (IM)
Signal To Interference To Noise Ratio (SINR)
Average Bit rate Per Resource Block (RRB)
Cell Throughput (T cell)
Down Link
IM,dl :Interference margin in down link.
Pdl,rb: Power transmitted per resource block in downlink.
F: Average ratio between the received power from other cells to that of own cell (Interference Factor).
N,rb: Thermal noise per resource block in downlink.
Lsa,max: Max signal attenuation in downlink.
H: Average attenuation factor dependent on site geometry,antenna pattern,wave propagation exponent and base station height,recommended 0.36.
From Link simulations
a1 ,a2 ,a3 : Fitted parameters.
a0 : Fitted parameter that represents the maximum obtainable bit rate in one resource block.
Cell Throughput ( T cell)
The bit rate per resource block is scaled by total no. of resource blocks to obtain average bit rate in downlink.
R avg,dl = n,rb * R,rb
n,rb
: Total number of resource blocks in downlink
R avg,dl
: Average bitrate in downlink.
R,rb
: Average bitrate per resource block.
T.cell=Q,dl * Ravg,dl
T,cell
:Cell throughput in downlink
UPLinK

The bit rate at the cell edge = average bit rate in cell
R avg,ul= R,rb * (n,rb - n,pucch)
Ravg,ul
: Average bit rate in uplink.
R,rb
: Average bit rate per resource block.
n,rb
: Total number of resource blocks in uplink.
n,pucch
: Physical uplink control channel.
T,cell = Q,ul * Ravg,ul
The main idea is done by dividing the cell in to a group of rings
Path Loss Lsa,max
System load QDL
Antenna Tilt
Cell Throughput
R
esource
B
lock
Development of
Dimensioning Tool
Tool Presentation
Thanks
for listening to us
Full transcript