Mentum LTE Planet v521 07sep2010 Peter

8/13/2019 Mentum LTE Planet v521 07sep2010 Peter

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Application note for LTE FDD for

planet v5.2.1 (build 44)

Peter Cheung,

Technical Consultant

Mentum HK

09 Sep 2010


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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


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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


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Project setup (2) preference


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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.


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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)


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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


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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


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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


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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


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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)


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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)


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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]


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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


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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)


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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


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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


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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


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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.,


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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


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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)


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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 %


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Network analysis (4) define area

Define area (e.g.,rectangle, polygon)

Area grid can be used in networkanalysis/MC/analysis statistics report


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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]


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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


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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


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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


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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


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Network analysis (10) Femtocell

Run Femtocell extension [see

separated Femtocell ppt for details]


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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


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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


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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


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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


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Can filter by one filter

Can filter by >1 filter

Similar to grid query from grid

manager, extract statistics basedon different filtering criteria


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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)


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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)


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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)


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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


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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)


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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)


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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


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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


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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


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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

=


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MC (5) generate reportStatus with blocked reason

Detailed MC report for sub/throughput per sector/carrier


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Other (2) import IM


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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


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Other (4) edit/compare NL

NL result can be view in map or manually add/delete

Different NL table can becompared and merged


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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


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Other (6) AFP and PCID results

Display PCID/carrier in map

Report of reuse distance/interference %for different sector


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Backup slides


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Spectral efficiency vs CINR

Different curve for different MCS

under different channel conditions


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DL frame structure


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DL reference signal (3GPP 36.211)

Normal CP, # Tx antenna = 1



Depending on # Tx antenna, # and RE position is

different for reference signal of different antenna


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A3 Handover event


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LTE QCI (QoS class ID)

3GPP 23.203 QCI table for different services and PER


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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

_

__ =


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Mentum LTE Planet v521 07sep2010 Peter

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