mentum lte planet v521 07sep2010 peter
TRANSCRIPT
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
1/62
Application note for LTE FDD for
planet v5.2.1 (build 44)
Peter Cheung,
Technical Consultant
Mentum HK
09 Sep 2010
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
2/62
2
Work flow Project setup
Map, preference (e.g., unit, display) and project setting
Network setting (spectrum, mod CINR, frame setup)
Create site table (e.g., ASP, Capesso, network overlay)
Sector setup Organize sectors (flag/group/query/site set/site template)
General (long/lat, antenna, link budget, model, filter mask)
Antenna algorithm (MIMO, diversity, AMS)
Power (EIRP, avg per RE per channel)
ICIC related (RSRQ threshold and outer cell RE %)
PCID and A3 HO threshold Network analysis
Setup sub (equipment and service) and environment
Define area and PoC curve
other system interference (e.g., other system interference, Femtocell)
Generate layers for different loading %
Do statistics report, compare with KPI
Monte Carlo Generate traffic map and setup sub type
Setup scheduler and run MC for combination of sub type/environment
Apply cell loading and re-run network analysis
Others Generate IM, NL (single/multi-tech)
AFP and PCID
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
3/62
3
Project setup (1) map
DTM/cutter/clutter
height/polygon/vector musthave same projection/resolution
(eg UTM xxx at xxx m)
Since model is map dependent, so need to select
proper map to run prediction for different models
Map should be in UTM zone xxx and
site/sector/DT should be in long/lat
Subfolder names under
Geodata must be matched
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
4/62
4
Project setup (2) preference
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
5/62
5
Project setup (3) network setting
Define spectrum (start/end DL/UL freq and BW)
For subband (e.g., with carriers gap), need to define separate
band, since each sector can ssign ONLY one band
grey out means some sectors are using defined band.
If need to modify existing band, need to first switch all
sectors using this band to a dummy band first.
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
6/62
6
Project setup (4) network settingOption 1 CINR threshold for each MCS with one spectral eff
[bits/symbol] at some specified PER %, bits/symbol can be extracted
from CQI table in 3gpp 36.213
Speed of each MCS is defined
in project setting
Option 2 define spectral efficiency curve for each MCS. If used, new layers
can be generated (e.g., UL/DL max/avg spectral eff) and affect max UL/DL data
rate layers, best available DL/UL mod and UL noise rise (select max spectral eff)
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
7/62
7
Project setup (5) network setting
If Interference coordinate (i.e., ICIC) isenabled for this frame config, FFR, RSRQ
threshold and RE % can be specified
carrier BW will define
FFT size, sampling freq
# occupied DL/UL subcarriers (excl DC/guard)
# total RB/slot
# RB for sounding ref signal
Throughput (including L1 overhead)
= #occupied subcarrierx #symbol/slot x #slot/frame x fps xbit/RE
e.g., 10MHz carrier with spectral eff=5bits/RE has601x7x20x100x5 = 42Mbps
Throughput (excluding RS symbol)
= #data symbol/RB x #slot/frame x fps x #RB/slot x
#bit/symbol
e.g., 10MHz carrier with 4 RS symbol and 64QAM/no
FER has 80 x 20 x 100 x 50 x 6 = 48Mbps
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
8/62
8
Project setup (6) network settingDL frame editor UL frame editor
DL overhead % = total overhead / DL frame duration
Where
Total overhead = CP + PDCCH + PBCH + ref signal
Note that #RE allocated for PBCH and ref signal is
dependent on # of tx antenna.
UL overhead = demod ref signal + PUCCH
+ sounding ref signal
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
9/62
9
Project setup (7) use ASP
Define basic (fit hexagon) or advanced (can use
candidate site list, traffic map, coverage/model criteria)
Define clutter exclusion, antenna height range, max
pathloss, site radius Define polygon/area
Propagation model criterion
Traffic/site template criterion
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
10/62
10
Project setup (8) use ASPOptimization constraint used by ASP and
ACP (e.g., capesso) as input setting
Range of antenna height that
can be adjusted by ASP
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
11/62
11
Project setup (9) use ASP
Sites generated from advanced ASP (meet criteria for
coverage then traffic, use customized site template for
different clutter and with antenna height adjusted)
Sites generated from basic ASP (fit # polygon of
defined radius for 1 site template for al l clutter
and with clutter exclusion)
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
12/62
12
Project setup (10) use capesso
Create site candidate lists in planet first, run prediction. Then export to capesso and
let capesso pick # site according to user defined criterion (coverage/capacity)
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
13/62
13
Project setup (11) network overlay
pick data source for other technology (e.g., group of GSM sites from
same project)
select LTE FDD band used for newly created co-located LTE FDD sites
(with same antenna ht/azimuth, # of sector etc) save new LTE FDD site tabe and/or add suffix to sector ID [optional]
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
14/62
14
Sector setup (1) organize sectors
Flag, group, query to
organize sectors for
display/network analysis
Site set is storage of full/partial set of different version
(e.g., site set before and after optimization)
Query offer flexible sector group accordingly
to user defined criteria
Site template can be
created from existing sites
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
15/62
15
Sector setup (2) general
Site base station (different technology)
sector antenna ID (e.g., split sector)
Each sector assign one band with its flag/group
Max pooled throughput of site
(blocked sub in MC runs)
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
16/62
16
Sector setup (3) general
Each sector assign
antenna algorithm
prediction model/distance/# of radial
one or multiple antenna with specified link budget and feeder length
Tx/Rx filter mask (at eNodeB)
Set threshold for blocked sub in MC run
(coverage, #sub, UL noise rise)
Affect adjacent channel
interference
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
17/62
17
Sector setup (4) antenna algo
Smart antenna/beamforming
increasing CINR by increasing C and
decreasing I
Diversity gain adding CINR margin
MIMO (open-loop) or spatial MUX increasing
throughput relative to SISO with option for UL
collaborative MIMO and LOS exclusion
[MIMO improve throughout, not necessary coverage]
Automatic MIMO switch switch to diversity (low
CINR) or MIMO (high CINR) or MIMO+diversity (high
CINR with spare antenna for diversity)
See antenna algorithm
application note for details
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
18/62
18
Sector setup (5) power
Combined PA power (e.g., if #Tx antenna=2
with 40dBm each, PA power=43dBm)
Enable hopping can improve reference CINR, but also affect
DL loading % to other cell depending on RE reuse
Ref signal power = PA power x (% of ref signal within 1 RB)
Where % depends on #subcarrier for ref signal and data
E.g., 10MHz carrier has #ref signal subcarrier/RB=2, #total
subcarrier/RB=12 ref signal Tx power = 34.55dBm with
3dB boost
Avg power per RE for xxx signal (used
to calculate different RSRP, DL CINR)
Affect UL CINR
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
19/62
19
Sector setup (5) ICIC related Input for network analysis, output for MC
DL loading % = traffic loading
= used # data RE / available # data RE
e.g., 10MHz has 2 RS RE/RB, if 4 data
subcarrier/RB is used,
then DL loading = 4/(12-2)=40%
[assume RS always Tx. But not data]
UL noise rise can be initially estimated as
10*log[1/(1-UL loading %)]
FFR usage % = % traffic loading in outer cell
(only for frame config supports ICIC)
Multiple antenna % = % traffic support AAS
RSRQ (ref signal received quality)
used to define inner/outer cell boundary
Outer cell % = RE% used in outer cel l
e.g., 100% means no ICIC
e.g.,
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
20/62
20
Sector setup (6) PCID and HO
PCID = [0..503] used for sector ID, and is
combination of phy layer cell ID group =[0..167] from SSS
phy layer identity = [0..2] from PSC
Since ref signal hopping is dependent on
PCID, if PCID of best server/interferer is
same, ref signal CINR is lower
Used for AFP
(e.g., Threshold to trigger A3 measurement).
HO layer will show a HO if (sector reference signal
strength
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
21/62
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
22/62
22
Network analysis (2) setup sub
Packet switched service(e.g., VoIP, 64k email, 1M
web/FTP, 128k email) withdifferent priority and QoS
Convert traffic map to #subto spread by MC by
individual loading specified[see MC ppt for detail]
Actual throughput basedon UL/DL activity %
QoS class priority (e.g., 1min=max data rate, 9
means min=0.1kbps (BE))Sub type ONLY use in MC
(see later slides on MC)
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
23/62
23
Network analysis (3) environment
Planet has 4 default environment (I, O, V, DI) need to map clutter class to 1~4 environment e.g., water related clutter has no I, V, DI, then that analysis on
non-mapped environment will not consider that clutter class fast fading margin = headroom for Rayleigh fading variation
(e.g., 60km/hr require 10dB for 64QAM) penetration loss = extra building/vehicle loss apart from one
from prediction model (e.g., 10~30dB depending on wall material)\ vehicular speed (V environment) = typical speed of UE/CPE forassociated clutter
Clutter-dependent DLorthogonality %
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
24/62
24
Network analysis (4) define area
Define area (e.g.,rectangle, polygon)
Area grid can be used in networkanalysis/MC/analysis statistics report
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
25/62
25
Network analysis (5) setting
Each network analysis has one band
equipment environment cell edge probability % KPI, used in Jakess
curve from slow fading margin(for MC, different % for different service)
speed # UL RB/sub
assume each map pixel has 1 sub
affect UL CINR (less RB/sub, UE concentrate its
power on less RB, extend coverage but reduced
data rate)
depends on scheduler from MC
model as fixed value in network analysis
Choose best server if
total received signal strength > threshold
(i.e., sensitivity)
has highest ref signal strength [dBm]OR highest RSRQ [dB]
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
26/62
26
Network analysis (6) ICIC input
ICIC uses to reduce reused RB in outer cell
(i.e., improve cell edge coverage prob %)
Basic = remove % interference based on DL
loading % at best serving sector (i.e., withoutinteraction between eNodeB)
Advanced = sort interfering sector according
to received power and rank sectors toprioritize interference removed by scheduler
(i.e., most interfering sector will use non-interfering RB the most, with interactionbetween eNodeB)
See separate ICIC ppt for details
Under ideal channel conditions, OFDMA guarantee
orthogonality between RB, so no co-channelinterference for inner cells from best server
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
27/62
27
Network analysis (7) UL PC
No DL power controlUL power control
FULL = decrease Tx of UE/CPE just enough to achieve the required CINR of given MCS
fractional = further decrease Tx of UE/CPE by pathloss weighted by alpha= this prevent UE/CPE with large pathloss (i.e., along inter-cell boundary) to
transmit excessive power and interfere with all neighbor cells
3GPP equation for fractionalUL power control
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
28/62
28
Network analysis (8) define PoC
PoC % of reusing the same RB asa function of DL loading %. ThisPoC curve is used to calculate co-
channel interference
e.g., increasing slope ofPoC with scheduler
Normal PoC curve
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
29/62
29
Network analysis (9) other
system interference
Option 1 as fixed power [dBm]
in same channel per sector
Power setting for each sector
Option 2
import interference grid file(.grd) with specified center freq/BW
E.g., CDMA1xRTT overlay DL interference import best server
pilot Ec (since always Tx) UL interference UE EIRP
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
30/62
30
Network analysis (10) Femtocell
Run Femtocell extension [see
separated Femtocell ppt for details]
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
31/62
31
Network analysis (11) layers
Layers can be divided to Common (for all carrier) per carrier
Best server related(total/ref signal/syn signal)
HO related
DL coverage (prob%, AAS, CINR,
data rate, CQI, MCS, margin)
UL coverage (prob%, CINR, MCS,margin, data rate, tx power)
Summary coverage
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
32/62
32
Network analysis (11) diff loading
DL CINR
75% DL loading25% DL loading
Similar to cell loading
in CDMA network
Examine layer for different setting
(e.g., DL loading %, antennalgorithm)during initial planning scenario
DL avg data rate
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
33/62
33
Network analysis (12) ref signal 3 analysis layers generated related to reference signal
RSRP (ref signal received power) [dBm]
= EPRE (energy per RE) in 3GPP (e.g., KPI has RSRP > -90dBm)= avg power received on 1 ref signal RE
Ref signal strength [dBm]
= total power received on ref signal RE
= RSRP x 10log(# of ref signal RE)
RSRQ (ref signal received quality) [dB](e.g., KPI has RSRQ > -10dB)
= 10log (N x RSRP / RSSI)
Where N = total #RB, RSSI=avg power received on ref signal symbol
Max RSRQ = -3dB
UE/CPE measure RSRP and RSRQ
Compare to WCDMA RSRP CPICH RSCP for coverage KPI
RSRQ CPICH Ec/No for interference KPI
Cell selection procedure [idle mode] RSRP is used
HO procedure can be RSRP, RSRQ or both
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
34/62
34
Network analysis (13) statistics
Can do statistics on one ormultiple layer
Since each layer is a mapinfo grid file, statisticsreport can be generated and check for KPI
Include NULL and/or
zero values in statistics
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
35/62
35
Network analysis (14) statistics
Can filter by one filter
Can filter by >1 filter
Similar to grid query from grid
manager, extract statistics basedon different filtering criteria
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
36/62
36
Network analysis (15) statistics
Step size usedfor statistics
Step size used
for statistics
% sub area and %
sub within area X
Filter by grc grid (e.g., best
server or clutter map)
Filter by traffic map (e.g., Er,
#sub, throughput)
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
37/62
37
Network analysis (16) statistics
Best server laye filter by numericgrid (e.g., DL avg data rate)
Compute mean/min/max/median/std dev/RMS of all bins within best serving coveragearea of sector xx
Note, mean grid is NOT avg sector thoughput, since mean is avg is ALL DL data ratebin, assuming there is 1 sub per bin (e.g., problem for overshoot area with no sub)
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
38/62
38
Network analysis (17)
optimization based on statistics[see separate ppt for LTE optimization based on statistics]
Sort (ascending/descending)
(e.g., find top 10 sectors with highest
coverage prob %) filter by specified range generate statistics CDF/PDF generate labels
generate sector display scheme(e.g., different sector color to rep. specified
data rate range)
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
39/62
39
Coverage for RS Boost for RS
PCID and RS FH
Power affects coverage/interference DL power RS and PSS/SSS signal with boost
UL power PUCCH, PUSCH and SRS
Antenna config Multiple antenna affects DL CINR, which determine highest MCS, max data rateand spectral efficiency
E-tilt/azimuth/height/type improve DL CINR for sub close to eNodeB
ICIC Affect DL CINR and data rate, especially at outer cell
Affect cell edge coverage probability, especially for high MCS
Static ICIC using 1:3 reuse Dynamic ICIC based on channel/traffic conditions (e.g., RSRQ, FFR %, outer cell
RE %)
Scheduler Assign RB according to predefined rules [see MC slides later]
Network analysis (18)
optimization parameter examples
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
40/62
40
MC (1) generate traffic map
Generated Traffic map can be convert (between
different unit), scaled and combined
Generate traffic map by regions (polygon) vector
classified grid (e.g., clutter map) network data (e.g., recorded OSStraffic statistics per sector)
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
41/62
41
MC (2) use traffic map as demand
Traffic demand for LTE can be
#sub or throughput [kbps]
Tabulate site ID/sector ID/ # of
sub as an excel file
Import excel file to planet
and map column Import excel to operational data
NOTE: use MC for indication to capacity/dimensioning and network stability
(i.e., when network becomes saturated and start to block sub)
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
42/62
42
MC (3) generate TM via best
server with clutter weight
Create best servergrid based on RS
Apply weight for
different clutter class
Spread traffic demand per sector
according to best serving coverage bins
Combine vector to
clutter as new clutter
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
43/62
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
44/62
44
MC (5) setup sub type
1 sub type have
traffic map
equipment
one or more usage (weight for 4 environment) for one or
more services/speed combination
Priority set for
different sub type
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
45/62
45
MC (3) setup MAC schedulerProportional demand
Proportional fair
Maximum capacity
Scheduler types (serve sub at min data rate) priority
Based on priority in sub setting
proportional demand
RB given to low data rate sub max capacity
RB given to high data rate sub
proportional fairRB given to sub with better CINR
user definedRB given to sub with user defined weight
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
46/62
46
MC (4) setting
Choose one or more sub
type in 1 freq band
Input # of MC run and
required convergence %
Choose scheduler
Steps of MC spread sub randomly and independently per run sort sub by priority (sub type, service, QoS)
analyze DL and UL, check if sub is served
generating operating point and sub info (e.g.,
status and spreading)
subblocked#avg
minmax%
5#run5lastof# runlastofsubblockedsubblockedeconvergenc
=
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
47/62
47
MC (5) generate reportStatus with blocked reason
Detailed MC report for sub/throughput per sector/carrier
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
48/62
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
49/62
49
Other (2) import IM
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
50/62
50
Other (3) generate NL
NL can be generated
based on best server grid or IM for single technology (LTE LTE)
for multiple technology (LTE CDMA,
CDMA LTE)
From Best server grid, get NL from border
From IM, get NL from
overlapped area/traffic or both
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
51/62
51
Other (4) edit/compare NL
NL result can be view in map or manually add/delete
Different NL table can becompared and merged
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
52/62
52
Other (5) generate AFP and PCIDViolation cost for AFP
Violation cost for PCID
For AFP/PCID planning, IM is mandatory input,and NL input is optional
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
53/62
53
Other (6) AFP and PCID results
Display PCID/carrier in map
Report of reuse distance/interference %for different sector
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
54/62
Backup slides
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
55/62
55
Spectral efficiency vs CINR
Different curve for different MCS
under different channel conditions
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
56/62
56
DL frame structure
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
57/62
57
DL reference signal (3GPP 36.211)
Normal CP, # Tx antenna = 1
Normal CP, # Tx antenna = 2
Normal CP, # Tx antenna = 4
Depending on # Tx antenna, # and RE position is
different for reference signal of different antenna
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
58/62
58
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
59/62
59
A3 Handover event
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
60/62
60
LTE QCI (QoS class ID)
3GPP 23.203 QCI table for different services and PER
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
61/62
61
Channel models (3GPP 36.101 app B2) EPA5 slow speed pedestrian sub with highest throughput
EVA50 medium speed sub
ETU300 high speed sub with multipath spread > CP window
carrierf
dopplerfspeedmobile
_
__ =
-
8/13/2019 Mentum LTE Planet v521 07sep2010 Peter
62/62