dimensioning of wcdma radio network subsystem for ...• impact of site solutions src** and mha***,...
TRANSCRIPT
1 © NOKIA Config_dim_in_WCDMA_RNS.ppt / 12.2.2002 / Jarno Toivonen
Dimensioning of WCDMA radio network subsystem for determining optimal configurations
Master’s Thesis, Jarno ToivonenNokia Networks
Supervisor: Prof. Sven-Gustav Häggman
2 © NOKIA Config_dim_in_WCDMA_RNS.ppt / 12.2.2002 / Jarno Toivonen
Agenda
• Background
• Research problem
• Definitions
• Review of prior research
• Simulations
• Conclusions
3 © NOKIA Config_dim_in_WCDMA_RNS.ppt / 12.2.2002 / Jarno Toivonen
Background
• Strategic intent to rationalise and limit the number of configurations to the optimum
• Gained benefits• in supply logistics• shorter lead times in delivery• reduced inventories and obsolescence risk• reduced costs during the network life cycle in O&M, spares, etc.⇒ higher margin for the supplier, lower OPEX for the operator
• However, by limiting the variety of HW elements of different properties, the risk of impoverishing the offerings portfolio increases and the cost-performance ratio of the overall network is compromised resulting in less competitive solutions
4 © NOKIA Config_dim_in_WCDMA_RNS.ppt / 12.2.2002 / Jarno Toivonen
Research problem
• Triangular framework where the configurations are interconnected with the achievable network performance and resulting cost
• The challenge is to find limited number of cost efficient configurations that meet the defined performance requirements
Configuration
Network performance:Coverage, capacity & quality
Cost effectsin the rollout
5 © NOKIA Config_dim_in_WCDMA_RNS.ppt / 12.2.2002 / Jarno Toivonen
Definitions
• The scope of research includes base station configurations and access network transmission
• The number and configuration of base stations drive both the performance and cost of the overall network
• Configuration refers to an assembly of base station structural elements, antenna system, and transmission equipment
• Costs are considered as configurations’ characteristic impact on the required CAPEX in the rollout
6 © NOKIA Config_dim_in_WCDMA_RNS.ppt / 12.2.2002 / Jarno Toivonen
Review of prior research (1/2)• BTS site sectorisation increases offered capacity and coverage
probability, also lower transmit powers are possible. However, for a cluster of cells increasing other to own cell interference i and SHO overhead limit the optimal sectorisation
⇒ Best performing site types in macro cellular environment*:• 3-sector 65° 3dB antenna beam width• 6-sector 33° 3dB antenna beam width
• In addition comparisons include• 2-sector site (in particular for highway coverage)• 4-sector site
• Impact of site solutions SRC** and MHA***, and also ROCs are examined• Generally single layer macro cellular network the most cost efficient
for rollout* Source: Wacker et al.: The Impact of Base Station Sectorisation on WCDMA Radio Network Performance, IEEE VTC 1999** Source: Holma, Tölli: Simulated and Measured Performance of 4-branch Uplink Reception in WCDMA, Paper for IEEE VTC 2001*** Source: Cooreman: Masthead Amplifier (MHA) Benefit, Network Planning Belgium, February 2001, Nokia Networks
7 © NOKIA Config_dim_in_WCDMA_RNS.ppt / 12.2.2002 / Jarno Toivonen
Review of prior research (2/2)
• Currently two-thirds of access network transmission implemented with microwave radio*
• Fast and cost-efficient rollout
• Depending on link length and how competitive prices are locally, also copper/leased lines may be the underlying media
• Fibre practically only in core, although the share of fibre expected to grow along with data traffic increase and all-IP
• Tree and chain topologies most common in GSM, loops for high capacity and important links**
• GSM CT TDM-based, whereas ATM specified as WCDMA transport technology
• Operator decision between IMA/fractional E1 and ATM network
* Source: Whitepaper: Microwave Radio Network Planning in 3G, 2001, Nokia Networks** Source: Törmä: Cellular Access Network, Planning Aspects of 3G Networks, Merito Forum Seminar, April 2001
8 © NOKIA Config_dim_in_WCDMA_RNS.ppt / 12.2.2002 / Jarno Toivonen
Simulations
9 © NOKIA Config_dim_in_WCDMA_RNS.ppt / 12.2.2002 / Jarno Toivonen
Formulation of simulation cases
• The performance of each configuration measured by the required number of sites in the three network scenarios
• Reference for morphology classes and demographics is Helsinki/Espoo
45
53
448
5326
263
53
211
0%10%20%30%40%50%60%70%80%90%
100%
NRT dataRT dataSpeech
Low asymmetry speech oriented trafficwith low penetration
Low asymmetry speech oriented trafficwith high penetration
Medium asymmetry data oriented trafficwith high penetration
Subs./km2
Higher cell loading (network maturity)
Dense urban20%
Urban30%
Suburban10%
Rural35%
Road5%
300km2 service area: 1.1 1.2 2
10 © NOKIA Config_dim_in_WCDMA_RNS.ppt / 12.2.2002 / Jarno Toivonen
• MHA has great importance against thermal noise in AWGN channel
• SRC & MHA together ensure high performance for 3-sector site
• Triple-mode GSM/EDGE/WCDMA cost efficient config
• 6-sector not recommended in low loading scenario (uplink load less than 10%)
• Configs UL load limited, thus low TX powers
Traffic scenario 1.1Low asymmetry speech oriented traffic with low penetration
+46%
+125%
0
5
10
15
20
25
30
35
40
45
50
55
60
Req
uire
d nu
mbe
r of
site
s3-
secto
r SRC
ul +
MHA
basic
3-se
ctor +
MHA
GSM
/EDG
E co
-site
5W +
MHA
GSM
/EDG
E co
-site
8W +
MHA
basic
3-se
ctor (
50%
) & 3-
secto
r SRC
ul +
MHA
(50%
)
GSM
/EDG
E co
-site
5W (5
0%) &
1+1 R
OC 20
W (5
0%)
6-se
ctor 2
0W
2*(1
+1) R
OC 20
W
2*(1
+1) R
OC 40
W
3*(1
+1) R
OC 20
W
3*(1
+1) R
OC 40
W
basic
3-se
ctor (
60%
) & 1+
1 ROC
20W
(40%
)3-
secto
r SRC
ul1-
omni
5W
basic
3-se
ctor (
30%
) & 6-
secto
r 20W
(70%
)
basic
3-se
ctor (
30%
) & 3*
(1+1
) ROC
20W
(70%
)
basic
3-se
ctor (
50%
) & ba
sic 3-
secto
r + M
HA (5
0%)
basic
3-se
ctor (
50%
) & 2*
(1+1
) ROC
20W
(50%
)
GSM
/EDG
E co
-site
5W (5
0%) &
3-se
ctor S
RC ul
(50%
)1+
1 ROC
20W
1+1+
1 ROC
20W
1+1+
1 ROC
40W
basic
3-se
ctor 2
0W2+
2+2 R
OC 20
W
basic
3-se
ctor (
50%
) & G
SM/E
DGE
co-si
te 5W
(50%
)
GSM
/EDG
E co
-site
5W
GSM
/EDG
E co
-site
8W
basic
3-se
ctor (
80%
) & om
ni fi
ll-in
site
5W (2
0%)
11 © NOKIA Config_dim_in_WCDMA_RNS.ppt / 12.2.2002 / Jarno Toivonen
• 3-sector site with SRC & MHA clearly the best alternative
• Top four configs utilise two or three carriers per sector→ impact of available bandwidth on the operator’s business case
• ROCs run out of capability to meet rising loads, uplink load at around 30-40%
Traffic scenario 1.2Low asymmetry speech oriented traffic with high penetration
+48%
+104%
+519%
0102030405060708090
100110120130140150160170180
Req
uire
d nu
mbe
r of
site
s3-
secto
r SRC
ul +
MHA
basic
3-se
ctor +
MHA
6-se
ctor 2
0W3-
secto
r SRC
ul
basic
3-se
ctor (
50%
) & 3-
secto
r SRC
ul +
MHA
(50%
)
basic
3-se
ctor (
30%
) & 6-
secto
r 20W
(70%
)
basic
3-se
ctor (
60%
) & 1+
1 ROC
20W
(40%
)
basic
3-se
ctor (
50%
) & ba
sic 3-
secto
r + M
HA (5
0%)
GSM
/EDG
E co
-site
5W (5
0%) &
3-se
ctor S
RC ul
(50%
)
GSM
/EDG
E co
-site
8W (5
0%) &
3-se
ctor S
RC ul
(50%
)
basic
3-se
ctor (
30%
) & 3*
(1+1
) ROC
20W
(70%
)
basic
3-se
ctor (
50%
) & 2*
(1+1
) ROC
20W
(50%
)2-
omni
40W
basic
3-se
ctor 2
0W
basic
3-se
ctor (
50%
) & G
SM/E
DGE
co-si
te 5W
(50%
)
GSM
/EDG
E co
-site
5W
GSM
/EDG
E co
-site
8W
basic
3-se
ctor (
80%
) & om
ni fi
ll-in
site
5W (2
0%)
GSM
/EDG
E co
-site
8W +
MHA
2+2+
2 ROC
20W
GSM
/EDG
E co
-site
5W +
MHA
GSM
/EDG
E co
-site
5W (5
0%) &
1+1 R
OC 20
W (5
0%)
3*(1
+1) R
OC 40
W
2*(1
+1) R
OC 40
W
1+1+
1 ROC
40W
1+1 R
OC 20
W
2*(1
+1) R
OC 20
W
1+1+
1 ROC
20W
3*(1
+1) R
OC 20
W
12 © NOKIA Config_dim_in_WCDMA_RNS.ppt / 12.2.2002 / Jarno Toivonen
• Configs TX power limited
• Transmit diversity, i.e. SRC dl, would drive the site count even lower
• 6-sector config’s capacity assets fully used and therefore it is a valid alternative
• in targeted urban and suburban areas,• where traffic is expected to concentrate and grow rapidly, or• as a mirco cellular layer for hot spots
Traffic scenario 2Medium asymmetry data oriented traffic with high penetration
+45%
+100%
+824%
0
20
40
60
80
100
120
140
160
180
200
220
240
260
280
300
Req
uire
d nu
mbe
r of
site
s3-
secto
r SRC
ul +
MHA
basic
3-se
ctor +
MHA
basic
3-se
ctor (
50%
) & 3-
secto
r SRC
ul +
MHA
(50%
)3-
secto
r SRC
ul6-
secto
r 20W
basic
3-se
ctor (
60%
) & 1+
1 ROC
20W
(40%
)
basic
3-se
ctor (
30%
) & 6-
secto
r 20W
(70%
)
basic
3-se
ctor (
50%
) & ba
sic 3-
secto
r + M
HA (5
0%)
basic
3-se
ctor (
50%
) & 2*
(1+1
) ROC
20W
(50%
)
GSM
/EDG
E co
-site
5W (5
0%) &
3-se
ctor S
RC ul
(50%
)
GSM
/EDG
E co
-site
8W (5
0%) &
3-se
ctor S
RC ul
(50%
)
basic
3-se
ctor 2
0W
basic
3-se
ctor (
50%
) & G
SM/E
DGE
co-si
te 5W
(50%
)3-
omni
40W
basic
3-se
ctor (
30%
) & 3*
(1+1
) ROC
20W
(70%
)
basic
3-se
ctor (
80%
) & om
ni fi
ll-in
site
5W (2
0%)
GSM
/EDG
E co
-site
8W
GSM
/EDG
E co
-site
5W
GSM
/EDG
E co
-site
8W +
MHA
2+2+
2 ROC
20W
GSM
/EDG
E co
-site
5W +
MHA
GSM
/EDG
E co
-site
5W (5
0%) &
1+1 R
OC 20
W (5
0%)
2*(1
+1) R
OC 40
W
3*(1
+1) R
OC 40
W
1+1+
1 ROC
40W
1+1 R
OC 20
W
2*(1
+1) R
OC 20
W
1+1+
1 ROC
20W
3*(1
+1) R
OC 20
W
13 © NOKIA Config_dim_in_WCDMA_RNS.ppt / 12.2.2002 / Jarno Toivonen
• Site count × cost per site
Cost-performance analysis
Traffic scenario 1.1Configuration Number of sites
Overall RAN cost impact
1. 3-sector triple-mode 5W + MHA 32 0.0%
2. 3-sector SRC ul + MHA 24 +10.9%
3. 3-sector 1+1+1 ROC 46 +22.9%
4. Basic 3-sector + MHA 33 +29.3%
5. 3-sector SRC ul 35 +32.4%
6. 3-sector triple-mode 5W 49 +32.6%
7. Basic 3-sector 46 +61.0%
8. 6-sector 34 +140.0%
Traffic scenario 1.2Configuration Number of sites
Overall RAN cost impact
1. 3-sector SRC ul 40 0.0%
2. 3-sector triple-mode 5W 65 +1.4%
3. Basic 3-sector + MHA 40 +2.7%
4. Basic 3-sector 56 +13.0%
5. 3-sector SRC ul + MHA 27 +15.9%
6. 6-sector 40 +62.9%
7. 3-sector 1+1+1 ROC 166 +155.9%
14 © NOKIA Config_dim_in_WCDMA_RNS.ppt / 12.2.2002 / Jarno Toivonen
• In the likely rollout scenario 1.1 relatively low capacities per BTS
• Co-siting possible upon an existing topology and TDM-based CT network• 2×2M medium adequate
• Scenario 2 represents transmission capacity peak
• Based on the analysis 58GHz short haul MWR not in demand
Transmission capacity development
0
1
2
3
4
5
6
7
8
9
10
11
12
13
Traffic scenario 1.1 Traffic scenario 1.2 Traffic scenario 2T
rans
mis
sion
cap
acity
/BT
S [M
bps]
0
50
100
150
200
250
Sim
ulta
neou
sly
serv
ed su
bs./B
TS
at b
usy
hour
6-sector3-sector SRC ul + MHA3-sector GSM/EDGE/WCDMA + MHA3-sector 1+1+1 ROC2-sector 1+1 ROC
15 © NOKIA Config_dim_in_WCDMA_RNS.ppt / 12.2.2002 / Jarno Toivonen
Conclusions
16 © NOKIA Config_dim_in_WCDMA_RNS.ppt / 12.2.2002 / Jarno Toivonen
NetDim results, general
• Selection of service mix has paramount effect on the required number of sites for given capacity, coverage, and QoS targets
• The site count can be minimised with diversity techniques, by adding carriers, and increasing transmit power
• In conservative loading scenario cost for capacity is high in WCDMA compared to GSM→GPRS→EDGE evolution path, because technological discontinuity to 3G demands higher investments regardless of theprojected subscribers
• Optimal sectorisation for macro cellular environment is 3-sector site both from performance point of view and in terms of co-siting
17 © NOKIA Config_dim_in_WCDMA_RNS.ppt / 12.2.2002 / Jarno Toivonen
NetAct results, general
• With low additional investment into transmission capacity the capability to serve simultaneous subscribers increases considerably
• As data traffic share breaks to 40%, transmission capacities per base station as high as 12Mbps at busy hour
• Despite of reuse of legacy equipment and existing media, dedicated WCDMA transmission is needed from the beginning
• Higher capacities compared to max. of 1-2Mbps per GSM site• Higher site density• ATM transport
18 © NOKIA Config_dim_in_WCDMA_RNS.ppt / 12.2.2002 / Jarno Toivonen
Optimal configurationsLow asymmetry speech
oriented traffic withhigh penetration
Medium asymmetrydata oriented traffic with
high penetration
Low asymmetry speechoriented traffic with
low penetration6-sector @ 20W per carrier,Antenna system: 33°/18dBi
Config: 1+1+1+1+1+1TRS capacity: 7×2M
TRS media: SDH radio, leased lines, fibre
3-sector @ 20W per carrier,Antenna system: 65°/18dBi,SRC ul and MHA
Config: 2+2+2TRS capacity: 5×2M
Config: 3+3+3TRS capacity: 7×2M
TRS media: PDH (SDH) radio, leased lines, fibre
2-sector ROC @ 20W per carrier,Antenna system: 120°/18dBi
Config: 1+1TRS capacity: 3×2M
Config: 1+1TRS capacity: 3×2M
TRS media: PDH radio
3-sector triple-modeGSM/EDGE/WCDMA@ 5W per carrier,Antenna system: 65°/18dBi,MHA
TRS media: PDH radio, leased lines
3-sector ROC @ 20W per carrier,Antenna system: 65°/18dBi
TRS media: PDH radio, leased lines
Config: 1+1+1TRS capacity: 2×2M
Config: 1+1+1TRS capacity: 2×2M
Config: 1+1TRS capacity: 2×2M
Config: 1+1+1TRS capacity: 2×2M
Low asymmetry speechoriented traffic with
high penetration
Medium asymmetrydata oriented traffic with
high penetration
Low asymmetry speechoriented traffic with
low penetration6-sector @ 20W per carrier,Antenna system: 33°/18dBi
Config: 1+1+1+1+1+1TRS capacity: 7×2M
TRS media: SDH radio, leased lines, fibre
3-sector @ 20W per carrier,Antenna system: 65°/18dBi,SRC ul and MHA
Config: 2+2+2TRS capacity: 5×2M
Config: 3+3+3TRS capacity: 7×2M
TRS media: PDH (SDH) radio, leased lines, fibre
2-sector ROC @ 20W per carrier,Antenna system: 120°/18dBi
Config: 1+1TRS capacity: 3×2M
Config: 1+1TRS capacity: 3×2M
TRS media: PDH radio
3-sector triple-modeGSM/EDGE/WCDMA@ 5W per carrier,Antenna system: 65°/18dBi,MHA
TRS media: PDH radio, leased lines
3-sector ROC @ 20W per carrier,Antenna system: 65°/18dBi
TRS media: PDH radio, leased lines
Config: 1+1+1TRS capacity: 2×2M
Config: 1+1+1TRS capacity: 2×2M
Config: 1+1TRS capacity: 2×2M
Config: 1+1+1TRS capacity: 2×2M
19 © NOKIA Config_dim_in_WCDMA_RNS.ppt / 12.2.2002 / Jarno Toivonen
Support slides
20 © NOKIA Config_dim_in_WCDMA_RNS.ppt / 12.2.2002 / Jarno Toivonen
Impact of DL code orthogonality
0,0
20,0
40,0
60,0
80,0
100,0
0 10 20 30 40 50 60
UL Load [%]
DL
Load
[%]
DL Load, 40% OrthogonalityDL Load, 50% OrthogonalityDL Load, 60% Orthogonality
145
150
155
160
0 10 20 30 40 50 60
UL Load
Path
loss
NRT Data 144k UL PathlossNRT Data 384k UL PathlossDL Pathloss, 40% OrthogonalityDL Pathloss, 45% OrthogonalityDL Pathloss, 45% OrthogonalityDL Pathloss, 55% OrthogonalityDL Pathloss, 60% Orthogonality
For a given maximum UL load, the greater orthogonality allows for higher DL load, i.e. more capacity
For a given maximum UL load,the greater orthogonality allows for higher tolerable path loss, meaning more coverage
21 © NOKIA Config_dim_in_WCDMA_RNS.ppt / 12.2.2002 / Jarno Toivonen
Hardware assembly in 1.1
• GSM/EDGE/WCDMA 5W and 1+1+1 ROC 20W are light configs in terms of WPAs, also small power consumption
• The general rules1 WAM per 1 WTR1 WAM per 3 WSPsare not necessarily true with low loading, so even fewer WAMs may be adequate
Required number of sites increases
3-se
ctor S
RC ul
+ M
HA
basic
3-se
ctor +
MHA
GSM
/EDG
E co
-site
5W +
MHA
GSM
/EDG
E co
-site
8W +
MHA
6-se
ctor 2
0W2*
(1+1
) ROC
20W
2*(1
+1) R
OC 40
W
3*(1
+1) R
OC 20
W
3*(1
+1) R
OC 40
W3-
secto
r SRC
ul1-
omni
5W1+
1 ROC
20W
1+1+
1 ROC
20W
1+1+
1 ROC
40W
basic
3-se
ctor 2
0W2+
2+2 R
OC 20
W
GSM
/EDG
E co
-site
5W
0123456789
101112131415161718192021222324252627
Num
ber
of u
nits
/BT
S
X-pol antennaMHAWPA 50WWPA 30WWPA 8WWPA 5WWTRWSP 32chWAMIFU
Required number of sites increases
3-se
ctor S
RC ul
+ M
HA
basic
3-se
ctor +
MHA
GSM
/EDG
E co
-site
5W +
MHA
GSM
/EDG
E co
-site
8W +
MHA
6-se
ctor 2
0W2*
(1+1
) ROC
20W
2*(1
+1) R
OC 40
W
3*(1
+1) R
OC 20
W
3*(1
+1) R
OC 40
W3-
secto
r SRC
ul1-
omni
5W1+
1 ROC
20W
1+1+
1 ROC
20W
1+1+
1 ROC
40W
basic
3-se
ctor 2
0W2+
2+2 R
OC 20
W
GSM
/EDG
E co
-site
5W
0123456789
101112131415161718192021222324252627
Num
ber
of u
nits
/BT
S
X-pol antennaMHAWPA 50WWPA 30WWPA 8WWPA 5WWTRWSP 32chWAMIFU
22 © NOKIA Config_dim_in_WCDMA_RNS.ppt / 12.2.2002 / Jarno Toivonen
Hardware assembly in 1.2
• Growing demand for capacity shows as increase in the number of WTRs, and thus also in CEs
Required number of sites increases
3-se
ctor S
RC ul
+ M
HA
basic
3-se
ctor +
MHA
6-se
ctor 2
0W3-
secto
r SRC
ul
basic
3-se
ctor 2
0W2-
omni
40W
GSM
/EDG
E co
-site
5W
GSM
/EDG
E co
-site
8W2+
2+2 R
OC 20
W
GSM
/EDG
E co
-site
5W +
MHA
2*(1
+1) R
OC 40
W1+
1+1 R
OC 40
W3*
(1+1
) ROC
40W
1+1 R
OC 20
W
2*(1
+1) R
OC 20
W1+
1+1 R
OC 20
W3*
(1+1
) ROC
20W
02468
101214161820222426283032343638
Num
ber
of u
nits
/BT
S
X-pol antennaMHAWPA 50WWPA 30WWPA 8WWPA 5WWTRWSP 32chWAMIFU
Required number of sites increases
3-se
ctor S
RC ul
+ M
HA
basic
3-se
ctor +
MHA
6-se
ctor 2
0W3-
secto
r SRC
ul
basic
3-se
ctor 2
0W2-
omni
40W
GSM
/EDG
E co
-site
5W
GSM
/EDG
E co
-site
8W2+
2+2 R
OC 20
W
GSM
/EDG
E co
-site
5W +
MHA
2*(1
+1) R
OC 40
W1+
1+1 R
OC 40
W3*
(1+1
) ROC
40W
1+1 R
OC 20
W
2*(1
+1) R
OC 20
W1+
1+1 R
OC 20
W3*
(1+1
) ROC
20W
02468
101214161820222426283032343638
Num
ber
of u
nits
/BT
S
X-pol antennaMHAWPA 50WWPA 30WWPA 8WWPA 5WWTRWSP 32chWAMIFU
23 © NOKIA Config_dim_in_WCDMA_RNS.ppt / 12.2.2002 / Jarno Toivonen
Hardware assembly in 2
• Although the difference in HW setup per BTS is in favour of e.g. ROCs, the difference in required number of sites is equally remarkable
• Figure shows the required changes in site configurations once asymmetric data oriented traffic with high penetration becomes reality
Required number of sites increases
3-se
ctor S
RC ul
+ M
HA
basic
3-se
ctor +
MHA
6-se
ctor 2
0W3-
secto
r SRC
ul
basic
3-se
ctor 2
0W3-
omni
40W
GSM
/EDG
E co
-site
8W
GSM
/EDG
E co
-site
5W2+
2+2 R
OC 20
W
GSM
/EDG
E co
-site
5W +
MHA
1+1+
1 ROC
40W
3*(1
+1) R
OC 40
W1+
1 ROC
20W
2*(1
+1) R
OC 20
W2*
(1+1
) ROC
40W
1+1+
1 ROC
20W
3*(1
+1) R
OC 20
W
02468
101214161820222426283032343638404244464850
Num
ber
of u
nits
/BT
S
X-pol antennaMHAWPA 50WWPA 30WWPA 8WWPA 5WWTRWSP 32chWAMIFU
Required number of sites increases
3-se
ctor S
RC ul
+ M
HA
basic
3-se
ctor +
MHA
6-se
ctor 2
0W3-
secto
r SRC
ul
basic
3-se
ctor 2
0W3-
omni
40W
GSM
/EDG
E co
-site
8W
GSM
/EDG
E co
-site
5W2+
2+2 R
OC 20
W
GSM
/EDG
E co
-site
5W +
MHA
1+1+
1 ROC
40W
3*(1
+1) R
OC 40
W1+
1 ROC
20W
2*(1
+1) R
OC 20
W2*
(1+1
) ROC
40W
1+1+
1 ROC
20W
3*(1
+1) R
OC 20
W
02468
101214161820222426283032343638404244464850
Num
ber
of u
nits
/BT
S
X-pol antennaMHAWPA 50WWPA 30WWPA 8WWPA 5WWTRWSP 32chWAMIFU