illustration for antenna coverage

8/10/2019 Illustration for Antenna Coverage

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HUAWEI TECHNOLOGIES CO., LTD.

Illustration for antenna coverage and Sugges



HISILICON SEMICONDUCTOR

HUAWEI TECHNOLOGIES CO., LTD.

Background

During network optimization, the coverage of some sites is fo

corresponding to the expectation. This situation need to be analyze



HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential 3

Antenna examination—test result for radiation pattern of returned antenna

Test result for antenna shows all parameters are satisfied the requirement of datasheet, deta

please refer to attachment.

ntenna

Frequenc

y

MHz

Gain HBW VBW FBR FSU Result

requirement

/ 17.6dBi 64° 7.3° ≥25dBTYP.17dB

/

ANT –

020#

871.5 17.4 64.83 7.43 28.68 25.81 Pass

876.5 17.23 63.78 7.87 26.13 25.22 Pass

881.5 17.1 64.74 7.65 25.66 17.76 Pass

ANT-817#

871.5 17.87 64.65 6.93 25.13 26.71 Pass

876.5 17.46 64.28 7.34 25.11 29.22 Pass

881.5 17.11 64.94 7.88 25.98 21.92 Pass




Coverage analysis—network topology evolution

From 2009, the network topology has some evolution. With growing of users a

more and more new sites are deployed in recent years, and down-tilt of antenn

change the coverage.




Coverage analysis--antenna radiation pattern

The factors which can influence the network performance:

HBW, VBW and Gain

Mechanical tilt and electrical tilt can change the coverage area of antenna;

The engineering error, accuracy of electrical tilt will also influence the coverage.

1 2




Mechanical downtilt performance Electrical downtilt performance

As shown in below picture, when the mechanical tilt is too big (around 5 degree), the side edge

some extension. The effect of mechanical tilt is not same as the electrical tilt, that means whe

degree, increasing 1 degree E-tilt will not compensate exactly.

Coverage analysis-- Difference Performance for mechanical and electrical tilt in larg




Coverage simulation in zero-tilt (fixed e-tilt 0 degree and m-tilt 0 degree) , in 5-

degree and m-tilt 5 degree) and in 10-tilt (fixed e-tilt 0 degree and m-tilt 10 degr

the coverage has been changed, and caused extension in side lobe when the m

increasing. The coverage will not follow expectation for optimization.

Coverage analysis-- with different mechanical tilt

HW A-Vendor

M-tilt 0 degree

M-tilt 5 degree

M-tilt 10 degree




From the below two samples, we will find when the mechanical tilt is large, the

will have some distortion.

Coverage analysis – Samples in existing network

ANTTYPE Mechanical-Tilt

DX-806-960-65-15i-0F 9

ANTTYPE M

LDX-6516DS-VTM




Coverage analysis--Comparison between fixed 6 degree and adjustable t

RSCP simulation in radiation direction




Coverage analysis--Comparison between fixed 6 degree and adjustable t

Coverage simulation in large down-tilt (total 14 degree)

M8+E6 M4+E




Conclusion and Suggestion

The radiation performance (pattern) of HW fixed 6 degree antenna (A9045180

parameters: ‘Side lobe suppression for first side lobe above horizon’ and ‘Front

satisfy the requirement of datasheet.

With growing of users and network load, more and more new sites are deploy

and down-tilt of antennas is increased to change the coverage. The fixed down

suitable for the scenario where need deployed with large down-tilt, which

mechanical down-tilt. This situation will introduce an influence of coverage

vendors antenna. So suggestions for these scenarios：

1， reduce mechanical tilt

2, reduce the height of antenna

3， replace the fixed tilt antenna with adjustable tilt antenna，e.g. A79451700v

Suggestion Regarding Tilt Optimization for site tha




Suggestion Regarding Tilt Optimization for site thainvolve Antenna Change

CELLNAME

NODEBNA

ME

850Mhz

LONGITUDE

(WGS84)

LATITUDE

(WGS84) ANTTYPE

Antenna

height Site type

Actual

Azimuth

Actual

Mech_Tilt

New

Mech_Tilt

Ac

Electri

Calle Tablones, San Pedro Poas_2 W3603 -84.2492 10.0896 LDX-6516DS-VTM 45 S-111 160 10 4

Peaje Alajuela_2 W3149 -84.19131 9.99992 LDX-6516DS-VTM 14 S-333 70 7 0

Salitral Sta Ana_3 W1103 -84.17938927 9.91119469 LDX-6516DS-VTM 50 U-S222 350 7 0

INTEL_3 W3057 -84.17313934 9.99777804 LDX-6516DS-VTM 30 DU-S333 320 7 0

Paso Ancho MOPT_3 W3531 -84.0806 9.91809 LDX-6516DS-VTM 22.5 DU-333 300 6 0

Peaje Alajuela_3 W3149 -84.19131 9.99992 LDX-6516DS-VTM 14 S-333 270 6 0 Liberia 2_1 W3064 -85.44244942 10.63313123 LDX-6516DS-VTM 45 DU-S333 120 8 4

Los Angeles, Ciudad Quesada_1 W3665 -84.4412 10.3605 LDX-6516DS-VTM 42 S-222 40 7 2

S.R. Liberia_3 W3119 -85.44573038 10.61559958 LDX-6516DS-VTM 38 DU-S222 320 4 0

Bo El Carmen Naranjo_2 W3574 -84.38175 10.10159 LDX-6516DS-VTM 27 U-S222 160 6 1

Boca Limon de Buenos Aires_2 W3547 -83.13898 8.96264 LDX-6516DS-VTM 52 S-111 110 3 0

Las Brisas Carandi_2 W3563 -83.26563 10.03547 LDX-6516DS-VTM 45 S-222 135 3 0


Mercedes Norte, Heredia_2 W3075 -84.12169 10.00285 LDX-6516DS-VTM 30 DU-S333 195 10 9

Puerto Moin_2 W3520 -83.07613 10.00325 LDX-6516DS-VTM 32 U-222 150 3 0

Quebradas, Perez Zeledon_1 W3703 -83.69615 9.41902 LDX-6516DS-VTM 57 S-111 110 3 0

Quebradas, Perez Zeledon_2 W3703 -83.69615 9.41902 LDX-6516DS-VTM 57 S-111 210 4 0

RTV Barreal de Heredia_1 W3581 -84.13392 9.96998 LDX-6516DS-VTM 25 U-333 70 5 0

San Juanillo_2 W3628 -84.395824 10.132349 LDX-6516DS-VTM 53.5 S-222 210 9 7 Santa Isabel Rio Cuarto_3 W3657 -84.2012 10.4627 LDX-6516DS-VTM 60 S-222 190 3 0

Bo Valverde San Isidro PZ_3 W3577 -83.71496 9.3767 LDX-6516DS-VTM 22.5 U-333 260 2 0

Carrillos Poas_1 W2023 -84.28280505 10.03049953 LDX-6516DS-VTM 50 U-S333 70 2 0

Coloradito de Corredores_1 W3599 -82.9029 8.60633 LDX-6516DS-VTM 39 S-222 90 2 0

Getsemani Heredia_2 W3584 -84.10717 10.03325 LDX-6516DS-VTM 37.5 S-333 180 8 6

Hotel Si como No_2 W3595 -84.154884 9.404046 LDX-6516DS-VTM 30 S-222 160 6 2


Las Delicias de Aguas Zarcas_3 W3610 -84.31942 10.42401 LDX-6516DS-VTM 3 7.5 S-222 240 3 0


Lourdes Carm iol (Vargas Araya)_1 W1074 -84.03849992 9.93786064 LDX-6516DS-VTM 30 DU-S333 340 8 6






Lourdes Carm iol (Vargas Araya)_2 W 1074 -84.03849992 9.93786064 LDX-6516DS-VTM 30 DU-S333 85 7 4

Moin_3 W4106 -83.0536555 9.99893395 LDX-6516DS-VTM 50 DU-S333 320 3 0

Olivia de Sixaola_1 W3573 -82.78964 9.61005 LDX-6516DS-VTM 42 S-111 110 2 0

Olivia de Sixaola_2 W3573 -82.78964 9.61005 LDX-6516DS-VTM 42 S-111 285 2 0

Rio 4to de Grecia_3 W3562 -84.22371 10.3471 LDX-6516DS-VTM 45 S-222 280 4 0


San Antonio Escazu_3 W1107 -84.13586078 9.90527814 LDX-6516DS-VTM 28 U-S3333 285 4 0

San Jeronimo Zurqui_1 W3631 -84.00784 10.04667 LDX-6516DS-VTM 30 S-11 30 2 0

San Rafael Norte PZ_2 W3594 -83.7121 9.40858 LDX-6516DS-VTM 30 S-111 100 6 2

San Roque Grecia_2 W3640 -84.29575 10.10178 LDX-6516DS-VTM 53 S-222 140 5 1

Boca Limon de Buenos Aires_1 W3547 -83.13898 8.96264 LDX-6516DS-VTM 52 S-111 0 3 0

Cariari HER_1 W3017 -84.15434656 9.97543176 LDX-6516DS-VTM 30 DU-S333 110 2 0

Central San Pedro_2 W1199 -84.056333 9.931139 LDX-6516DS-VTM 34 U-S333 140 6 3

Cocal Puntarenas_2 W3565 -84.812722 9.981075 LDX-6516DS-VTM 30 DU-222 250 3 0

Cruce Naranjo_1 W3512 -84.380898 10.077148 LDX-6516DS-VTM 53.5 S-222 10 7 5

El Carmen Norte Cartago_3 W3605 -83.917172 9.880242 LDX-6516DS-VTM 25 U-S333 350 2 0

Finca Santa Clara Roxana_4 W3629 -83.710069 10.303411 LDX-6516DS-VTM 39.5 S-311 10 1 0

General Viejo PZ 2_1 W3592 -83.6616 9.36395 LDX-6516DS-VTM 50 U-333 20 4 0

Iglesia La Soledad_3 W1060 -84.0745395 9.92993025 LDX-6516DS-VTM 30 DU-S333 250 5 2

Itabas Escazu_3 W3696 -84.1437 9.92345 LDX-6516DS-VTM 20 DU-333 310 6 3

La Luisa Sarchi_3 W3692 -84.340861 10.11381 LDX-6516DS-VTM 45 S-111 220 6 3 Las Delicias de Aguas Zarcas_1 W3610 -84.31942 10.42401 LDX-6516DS-VTM 37.5 S-222 30 3 0

Marriot Alajuela_2 W3073 -84.18652818 9.98799979 LDX-6516DS-VTM 30 U-S333 150 7 5

Moin_2 W4106 -83.0536555 9.99893395 LDX-6516DS-VTM 50 DU-S333 240 5 2

Paraiso 3_2 W3607 -83.87081 9.84081 LDX-6516DS-VTM 30 U-333 150 6 3

RACSA_2 W1164 -84.07836445 9.93627376 LDX-6516DS-VTM 36 DU-S333 90 8 7

Salitrillos Dulce Nombre_2 W3671 -83.973826 9.926655 LDX-6516DS-VTM 20 U-33 340 5 2

San Jeronimo Zurqui_2 W3631 -84.00784 10.04667 LDX-6516DS-VTM 30 S-11 160 6 3

San Rafael de Abangares_3 W3542 -84.877794 10.343584 LDX-6516DS-VTM 42 SU-222 350 2 0

Santa Isabel Rio Cuarto_1 W3657 -84.2012 10.4627 LDX-6516DS-VTM 60 S-222 10 3 0






Santa Isabel Rio Cuarto_2 W3657 -84.2012 10.4627 LDX-6516DS-VTM 60 S-222 110 3 0

Santo Domingo Heredia ICE_3 W3145 -84.09371427 9.97827854 LDX-6516DS-VTM 30 DU-S333 310 5 2

Turrialba_2 W2206 -83.68830504 9.9019444 LDX-6516DS-VTM 43 U-S333 180 1 0

B° Los Angeles_3 W1008 -84.08530037 9.92880034 LDX-6516DS-VTM 30 DU-S333 270 6 2

Aguacaliente_3 W3604 -83.9161 9.8395 LDX-6516DS-VTM 30 U-333 320 2 0

Alto La Cima de Atenas_1 W3662 -84.39839 10.01080556 LDX-6516DS-VTM 45 S-111 120 7 6

Aurora Heredia_2 W3179 -84.1511 9.98651 LDX-6516DS-VTM 24 DU-S333 240 6 4

B° Los Angeles_2 W1008 -84.08530037 9.92880034 LDX-6516DS-VTM 30 DU-S333 160 5 3

Bajos de Ario_1 W3585 -85.209139 9.731447 LDX-6516DS-VTM 47 S-111 35 1 0

Barva_3 W3007 -84.12647189 10.02616686 LDX-6516DS-VTM 32 U-S333 330 3 0

Bo San Martin Siquirres_2 W3612 -83.50301 10.10319 LDX-6516DS-VTM 27 U-222 140 1 0

Bo San Martin Siquirres_3 W3612 -83.50301 10.10319 LDX-6516DS-VTM 27 U-222 320 1 0

Bo Sta Teresa Escazu_2 W3527 -84.12991 9.91111 LDX-6516DS-VTM 28 U-333 130 2 0

Boca Barranca_2 W3633 -84.737861 9.971083 LDX-6516DS-VTM 54.5 U-333 160 4 1

Buenos Aires de Pocosol_1 W3598 -84.50124 10.57281 LDX-6516DS-VTM 39 S-111 60 1 0

Calle Tablones, San Pedro Poas_3 W3603 -84.2492 10.0896 LDX-6516DS-VTM 45 S-111 280 6 4

Central Limon_3 W4203 -83.03007077 9.99129854 LDX-6516DS-VTM 20 DU-S333 300 6 0

Central San Jose_2 W1161 -84.07784446 9.93331099 LDX-6516DS-VTM 40 DU-S3333 190 6 4

Central San Jose_3 W1161 -84.07784446 9.93331099 LDX-6516DS-VTM 45 DU-S3333 270 7 6



Edificio Maro_2 W1162 -84.08486 9.93515 LDX-6516DS-VTM 30 DU-S333 210 6 4

El Silencio de Savegre_1 W3699 -84.02756 9.411 LDX-6516DS-VTM 55 S-222 100 2 0



Frente de FANAL_1 W3555 -84.34174 10.01548 LDX-6516DS-VTM 49.5 S-111 0 3 0

Getsemani Heredia_1 W3584 -84.10717 10.03325 LDX-6516DS-VTM 37.5 S-333 60 2 0

Hone Creek_3 W3557 -82.79655 9.6558 LDX-6516DS-VTM 54 S-222 300 1 0

Iglesia La Soledad_1 W1060 -84.0745395 9.92993025 LDX-6516DS-VTM 30 DU-S333 10 7 6






INVU Sabanero 2_2 W3571 -85.43583 10.63786 LDX-6516DS-VTM 30 DU-333 270 4 1

INVU Sabanero 2_3 W3571 -85.43583 10.63786 LDX-6516DS-VTM 30 DU-333 330 2 0

La Asuncion Belen_2 W3549 -84.1688 9.98223 LDX-6516DS-VTM 25 U-333 140 4 1

La Colonia Guapiles_2 W3583 -83.8002 10.2431 LDX-6516DS-VTM 45 U-S222 130 3 0

La Hortensia de Paramo PZ_3 W3691 -83.70212 9.46411 LDX-6516DS-VTM 60 S-111 300 6 4


Los Guido_3 W3674 -84.042335 9.86844 LDX-6516DS-VTM 18 DU-333 280 4 1

Paso Ancho 1_1 W3504 -84.0829 9.909426 LDX-6516DS-VTM 24 DU-333 120 4 1

Pavas Canal 23 (Rohm ors er II)_1 W1085 -84.13230582 9.94383318 LDX-6516DS-VTM 24 DU-S333 20 4 1

Puerto Escondido de Osa_1 W3532 -83.47855 8.67624 LDX-6516DS-VTM 57 S-111 0 2 0

Puerto Escondido de Osa_2 W3532 -83.47855 8.67624 LDX-6516DS-VTM 57 S-111 150 2 0

Puerto Moin_3 W3520 -83.07613 10.00325 LDX-6516DS-VTM 32 U-222 280 2 0

RACSA_3 W1164 -84.07836445 9.93627376 LDX-6516DS-VTM 36 DU-S333 230 7 6

Rio 4to de Grecia_1 W3562 -84.22371 10.3471 LDX-6516DS-VTM 45 S-222 40 4 1

RTV Barreal de Heredia_2 W3581 -84.13392 9.96998 LDX-6516DS-VTM 25 U-333 160 4 1


San Sebastian_3 W1129 -84.0914903 9.90419023 LDX-6516DS-VTM 30 DU-S333 300 6 4

Sta Rosa Turrialba_1 W3578 -83.69656 9.9264 LDX-6516DS-VTM 41 U-S222 40 4 1

Tierra Blanca_2 W2201 -83.89483661 9.91568335 LDX-6516DS-VTM 27 S-222 170 6 2

Valle Azul de Paquera_2 W3620 -84.96558 9.780929 LDX-6516DS-VTM 52 S-111 100 1 0

Villa Franca de Pococi_3 W3621 -83.6185807 10.2976147 LDX-6516DS-VTM 54.5 S-111 260 3 0



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