3g indoor outdoor coverage planning
DESCRIPTION
IBS, MICRO, MACRO SITE PLANNING for WCDMATRANSCRIPT
封面二级标题黑体 /Arial( 加粗 )
白色黑色阴影
24 ~ 28 号
3G Indoor/Outdoor Coverage Solution
一级目录标题楷体 GB2312( 加粗 )
Arial( 加粗 )白色
24 ~ 28 号
Key Points of Coordinating Coverage ofKey Points of Coordinating Coverage ofIndoor & outdoorIndoor & outdoor
Key Points of Coordinating Coverage ofKey Points of Coordinating Coverage of Indoor & outdoorIndoor & outdoor
Cases of Coordinating Coverage of Indoor Cases of Coordinating Coverage of Indoor &outdoor&outdoor
Key Points of Coordinating Coverage ofKey Points of Coordinating Coverage ofIndoor & outdoorIndoor & outdoor
Key Points of Coordinating Coverage ofKey Points of Coordinating Coverage of Indoor & outdoorIndoor & outdoor
Cases of Coordinating Coverage of Indoor Cases of Coordinating Coverage of Indoor &outdoor&outdoor
二级目录标题楷体 GB2312( 加粗 )
Arial( 加粗 )红色 / 黑色24 ~ 28 号
3
Indoor data service is the main source of advancing income
The show of DoCoMo statistics, the use value of
3G Indoor service is 70%, and that most is new
feature 3G service.
The data service can advance ARPU and make
up voice ARPU decrease
Data service is main power of advancing ARPU
that Operator develop differentiation.
0
5
10
15
20
25
30
35
40
45
50
1998 1999 2000 2001 2002 2003 2004 2006 2008
Total ARPU Voi ce ARPU Data ARPU
Sta
tistic
s o
f E
uro
pe
op
era
tor
inco
me
(b
illio
nU
S$
)
Source: Yankee Group
use scene classification of movable termination
Source: NTT DoCoMo statistics
NTT DoCoMo has
begun to increase
build indoor coverage
from 2004, Close
2006, indoor site
occupy 23% with
total ,and that
continuous to expand
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4
Indoor coverage is very important for network performance
PingPang effect ( Middile )
Fade zone,Poor coverage area(elevator, basement)
Network busy(Shopping Mall 、 Exhibition Center)
solitary island effect ( TOP )
Coverage side : It make much pass loss of radio wave to form poor
coverage even fade zone because of screen and absorb with building.
Capacity side , Building as shopping mall, exhibition center happened
radio channel congestion because of high mobile phone useful density that
part of network capacity can not satisfied with useful
Quality side: The building high level space is easy to existing interfere,
signal of service cell is not stable and appear ”PingPang effect” ,voice quality
could not be assure and appear call drop.
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5
The perfect indoor coverage is the key of 3G network structure.
There is much pass loss with the high frequency of
3G. The much penetrate loss make the Marco outdoor
site not provide full radio coverage at indoor.
Much more services happen with indoor, involve
voice and data service. The perfect indoor coverage is
useful to raise network capacity
Voice is main service at 2G period, it
use wide coverage plot to solve the
problem about coverage and capacity
coverage
coverage
Capacity
Capacity
coverage
coverage
capacity
capacity quatity
quatity
2Gperiod
3Gperiod
Perfect indoor coverage is the key of network built from thinking about coverage and capacityPerfect indoor coverage is the key of network built from thinking about coverage and capacityPerfect indoor coverage is the key of network built from thinking about coverage and capacityPerfect indoor coverage is the key of network built from thinking about coverage and capacity
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6
The property analysis of 3G indoor/outdoor same coverage
discrete distribution
Signal interfere and leak
Same indoor distributed system
Traffic share
smooth interim
Same network with indoor and outdoor, share Same network with indoor and outdoor, share
with the coverage and capacity of all network, with the coverage and capacity of all network,
same 2G indoor system, built 3G indoor system same 2G indoor system, built 3G indoor system
quicklyquickly
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7
factor of 3G indoor coverage
Construction Construction
ConditionCondition
Wiring Condition
Electric Condition
Exterior Condition
Indoor signal qualityIndoor signal quality
Environment Interfere
User Feel ( power
consumptive )
Risk of market expansion
Network mature changing
Smooth market expansion
capability
Costs to built and Costs to built and
maintainmaintain
Costs and quantity of
equipment
Power saving capability
一级目录标题楷体 GB2312( 加粗 )
Arial( 加粗 )白色
24 ~ 28 号
Key Points of Coordinating Coverage ofKey Points of Coordinating Coverage ofIndoor & outdoorIndoor & outdoor
Key Points of Coordinating Coverage ofKey Points of Coordinating Coverage of Indoor & outdoorIndoor & outdoor
Cases of Coordinating Coverage of Indoor Cases of Coordinating Coverage of Indoor &outdoor&outdoor
Key Points of Coordinating Coverage ofKey Points of Coordinating Coverage ofIndoor & outdoorIndoor & outdoor
Key Points of Coordinating Coverage ofKey Points of Coordinating Coverage of Indoor & outdoorIndoor & outdoor
Cases of Coordinating Coverage of Indoor Cases of Coordinating Coverage of Indoor &outdoor&outdoor
二级目录标题楷体 GB2312( 加粗 )
Arial( 加粗 )红色 / 黑色24 ~ 28 号
9
Key Points of Coordinating Coverage Key Points of Coordinating Coverage of Indoor & outdoorof Indoor & outdoor
Outdoor signaling penetrates indoors
2/3G distributing system alternation
Indoor & outdoor Networking strategies
3G Multiple cells classification
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10
Analysis of outdoor signaling penetrates indoors
When the site is built at the top of the building,the outdoor signal distribute character as follow : The high level of signal coverage is stronger than lower level
The signal is much stronger close the window, it is to weaken quickly with penetrate deeply 。 The basement is better to separated, it belongs to fade zone with signal.
It should receive the stronger outdoor signal when the hall is glass top floor
The building of China Unicom in Shenzhen , the signal distribute at 20 floor when the site is at top floor :The area is 88.48% as the RSCP more than -85dBm.
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11
Analysis of outdoor signaling penetrates indoors
When the site do not built at top floor that the building will be covered, it cover with outdoor
penetrates indoors from surrounding site signaling. because of the antenna height is
controlled by 30 meters, at the condition the building of being covered (as 30F building, no
site at top floor) signal distribute as follow
It is belongs to poor coverage that the area with close window of high floor (over 20F) ; It is wild with signal that the area with close window of middle floor ( 7-20F ) It is poor coverage close window at lower floor.
It is poor coverage and fade zone with another eara. ...
the area about strong signal that
outdoor signal form near the window Poor
coverage area
Fade zone about signal
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12
Application suggestion of outdoor signaling penetrates indoors
WCDMA radio network is to be reflected in relativity at coverage, capacity, service quality. So we must think
about characteristic of outdoor signaling penetrates indoors to carry out suitable solution. Suggestion:
when it form stronger signal distribute with outdoor signaling penetrates indoors
When we pull into indoor signal to solve problem of poor indoor coverage, we suggestion to take
network deployment with same frequency, and it should strengthen indoor signal pointed at poor
signal area. Such as: inhabitant subdistrict .
When we pull into indoor signal to solve problem of capacity , we suggestion building indoor system to
reduce capacity consume of indoor use to outdoor cell, and adopt network deployment with different
frequency to absorb traffic with indoor. Such as: main office building with good opening ,venue etc.
It is not enough coverage of outdoor signaling penetrates indoors . We suggestion adopting network
deployment with same frequency when pull into indoor coverage. It is satisfied with requirement of coverage
and capacity in effect, it can apply to area of good closure such as: tunnel, subway, some market.
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13
Key Points of Coordinating Coverage Key Points of Coordinating Coverage of Indoor & outdoorof Indoor & outdoor
Outdoor signaling penetrates indoors
2/3G distributing system alternation
Indoor & outdoor Networking strategies
3G Multiple cells classification
二级目录标题楷体 GB2312( 加粗 )
Arial( 加粗 )红色 / 黑色24 ~ 28 号
14
The principle of 2G/3G indoor system change
It is less investment and fast built as same indoor
distribute system with 2G and 3G,
The total principle of 2G and 3G change : It
ensure the original network can get coverage
requirement after change ,make the most of
original equipment, control change costs
The main style of indoor coverage built with
2G/3G change : The difficulty of indoor
coverage built is to get engineering construction
permission. Though same indoor system with 2G
and 3G is the first solution for already finished 2G
indoor site.
GSM
WCDMA
DCS
Multifrequency mixer
WLAN
WLAN
Elevator
F1
F2
F14
...
F15
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15
The method of 2G/3G indoor system change
It is ensure system separate and keep the every system signal loss balance when
Same indoor system : It adopt plot of same or different frequency with effect of outdoor signaling
penetrates indoors
It use mixer of good performance for satisfied with 2G/3G isolation.,
It select suitable point combine with original 2G system feature, and do some
change if necessary. 。 It use optical fiber for RRU transmission to finish combine with 2G and 3G, it
should make up the high lose with WCDMA high frequency to ensure the wcdma
indoor coverage.
BBU+RRU is main signal source of 3G indoor system : BBU is to concentrate to put
and RRU adopt optical fiber with zoom out to reduce feed loss. Multi-RRU technique
make the flexible with network deployment ,it can replace amplifier to ensure
network performance.
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16
Power matching
The difference transmission and space loss of 2G/3G system
It need to think about the problem of power matching of system mix for
ensure get same coverage effect involve : Power matching at antenna
WCDMA signal is much
10dB/1.5dB than GSM
900/1800 at space loss
need power matching with
antenna outlet combine with
brink density of field
Different frequency network
deployment is lower
requirement than same
frequency network deployment
power matching of signal source WCDMA system add 13.7dB loss relative GSM900M
WCDMA downlink frequency is 2.11-
2.17GHz , 10dB, the frequency loss is about 10dB ; WCDMA add insert loss 1dB to adopt mixer with
same indoor system
Same feed with high frequency to add 2.7dB loss.
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17
Signaling source combination- system interworking
GSMSource
Antenna system
WCDMA-GSMDouble frequency
mixer
WCDMA
source
The requirement analysis of prophase can get
requirement of 3G power configuration
It can use 2G system for small coverage or
single fabric non-source system.
It should adjust feeder, antenna number and
location if necessary.
Non-source system make up of coupler, feeder
antenna, spliter ;
be suitable with small coverage building ;
As a result of no source equipment trouble point,
so cause lower trouble rate ,not need
maintenance and easy to expand
use w
ith n
on-sou
rce system
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18
Signaling source combination- system interworking-1
Source distributing system is to add repeaters and
coverage to passive distribution system
Source equipment can compensate signaling source loss
in the transmission and expand coverage range
Source system is usually applied to medium or large
indoor coverage system in 2G network
Source equipment will induce interference and rise floor
noise
Amplifier
3G is self-interfering system and it’s better not to use repeaters. Repeater shall not bring excessive noises to donor sites
Less than 1dB, uplink gain can be adjusted to achieve the balance of uplink and downlink of repeaters.
Large-power repeater not recommended 5W is best, 10W shall be carefully handled and 20W is forbidden. Small-power repeaters are not
suggested either
No cascading allowed Cascading of repeaters will result in deterioration of the uplink
Repeater used for compensation of coverage especially in lifts repeater not for capacity fulfilling
Ap
plication
p
rincip
les
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19
Signaling source combination-system interworking -2
GSMSource
WCDMASource
WCDMA-GSMdual band combiner
Feeder system
WCDMA-GSMdualband combiner
WCDMA-GSMdualband combiner
GSMsource
WCDMAsource
Feeder system
WCDMA-GSMdualband combiner
WCDMA-GSMdualband combiner
WCDMA-GSMdualband combiner
Feeder system
Feeder system
The above shows adding a
dualband combiner to avoid
repetitive wiring.
Suitable for places away from
signaling source and where
wiring is difficult
The following shows the
construction of a new 3G indoor
coverage system, sharing the
passive part of the integral system
Suitable for places with high
coverage requirements and easy
wiring .
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20
Passive devices alternation
2G source
combiner coupler
Power splitter
UMTSRRU
UMTSBBU
If the combiner is available, and WCDMA interface is preserved,
WCDMA signaling can directly into the combiner; if previous
combiner doesn’t support WCDMA or no combiner is available, add
multi-band combiner The working frequency of passive devices such as coupler or
power splitter shall be within 800 ~ 2170 MHz; If WLAN shares
indoor distributing system, frequency shall be 800~2500MHzWhen using the same cables, 2100MHz signaling will be largely
attenuated and shall be changed to big-diameter cables or add a
source transmission power.
Single frequency power divider Wideband power splitter
Wideband couplerSingle frequency coupler
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21
Feeder Alternation
8D/10D feeders longer than 5m in GSM system shall be changed into 1/2 〞 feeders ;
8D/10D feeders are not used for major use.
1/2 〞 feeders longer than 50m in GMS system shall be changed into 7/8 〞 feeders;
1/2 〞 feeders longer than 30m shall be changed into 7/8 〞 feeders
For cost saving purpose, 1/2 〞 feeders and connectors can be changed into 8D/10D
feeders.
Feeder loss
900MHz 2000MHz 2400MHz
8D feeder 14.0dB 23dB 26dB
10D feeder 11.1dB 18dB 21dB
1/2 〞 feeder
6.9dB 10.7dB 12.1dB
7/8 〞 feeder
3.9dB 6.1dB 7.0dB
Feeders used in GSM coverage system
are mainly 8D/10D/1/2 〞 , and 100 m
loss is as shown in the right table.
2000MHz and 2000MHz have quite
different losses and 8D & 10D feeders are
not suggested in over frequency band over
1.9GHz
The following shall be observed when alternating feeders: The following shall be observed when alternating feeders:
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22
Lift coverage alternation
Access points of lifts are limited, mostly on the floor or the top of the building.
Some buildings with over 30 storey have big loss caused by multiple access
points.
Yagi is widely used in indoor coverage especially GSM 900 due to high gain,
good direction, and suitable price.
Yagi are not suitable to work in the frequency of 890 ~ 2500MHz due to great
loss generated.
When 3G system is alternated, yagi shall be changed into plate-like antennae
and increase antennae so as to ensure enough power level at the edge.
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23
Antenna alternation
In line with “small power, multiple antennae” principle, based on the test result,
ascertain antenna distribution and make signaling equally distributed. Buildings with simple infrastructure and wide space such as basements, parking lots, airports,
supper malls, the number of antennae of which can be relatively small.
Buildings with complicated infrastructure and barriers, such as Karaoke boxes, restaurant
rooms, office buildings, the number of antennae of which shall be great and antennae shall be
within view.
Utilize the following method to control signaling lease:
shelter
Directional antennae perform coverage from edge to indoor ; Control the power of antenna
interface
Maintain signaling continuity of different coverage zones
Work frequency of antenna is recommended to be 885 ~ 2500MHz and shall be
consistent with the previous antenna indicators (gain, half-power angle etc).
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24
Key Points of Coordinating Coverage Key Points of Coordinating Coverage of Indoor & outdoorof Indoor & outdoor
Outdoor signaling penetrates indoors
2/3G distributing system alternation
Indoor & outdoor Networking strategies
3G Multiple cells classification
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25
Indoor & outdoor Interworking Scheme
Same frequency network or low-floor sharing the outdoor frequency and high-floor
using other frequency belong to intra-frequency networking Different frequency network and one-floor sharing the outdoor frequency and others
using other frequency belong to different frequencies interworking
f1
f1
Same frequency network
f2
f1
Other frequency
f2
f1
Low floor, previous frequency; higher
floors, other frequency
f1
f1f2
f1
Floor one, previous frequency; other
floors, other frequency
f1
lift
:outdoor
:floor
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26
Intra-frequency scheme analysis
Intra-frequency interworking:
Advantage: smooth transition with performance guaranteed
Disadvantage: maximum path loss supported reduces which deducts the coverage of signaling
source due to influence of outdoor signaling
Applicable scenes: buildings with big penetration loss and closed indoor environment such as
subway and multiple basements.
Low-floor sharing frequency and high-floor dividing in frequencies networking:
Advantage: with intra-frequency advantages and provided with good coverage and capacity
coming from different frequency networks.
Disadvantages: restricted by lift wiring, huge hard handover between different frequencies will
occur in lifts and on high storys, which will greatly affect users’ perception of the network; The
scheme is based on 2G system and 2G & 3G interworking is hard to realize.
Applicable scenes: buildings with few storys suffering little influence from outdoor interfering
signaling
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27
Different frequencies scheme analysis
Different frequencies networking
Advantage: co-use 2G system, share outdoor traffic load and reduce the interference and leakage of
indoor and outdoor signaling.
Disadvantage: outdoor cells open compression mode and affect the capacity; indoor and outdoor cells
perform hard handover and success rate declines.
Applicable scenario: external wall are mostly made of glass, outdoor signaling interference are relatively
great and signaling fades at the access to the first floor.
Networking of the first floor using the outdoor frequency and other floors using other frequency:
Advantage: imbued with the advantages of different frequencies networking; resolve the problem of
power consumption of outdoor cells caused by compressed mode; intra-frequency cells on the same floor
can provide with smooth handover.
Disadvantage: intra-frequency cells need to be constructed on a floor.
Applicable scenario: suitable for high storys, glass fabric and great interference of outdoor signaling.
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Characteristics of Indoor & outdoor Networking
The advantage of same frequency networking is to provide smooth
transition; But due to great impart of outdoor signaling, maximum path
loss supported may be reduced and coverage capability of signaling
source may be greatly lowered. 。 Different frequency networking can provide with bigger capacity, but
hard handover of entrances & exits such as the door and garage shall
be carefully planned. In indoor area, when different frequencies are interworking, Indoor cell
can provide good coverage and full capacity with no influence of outdoor
signaling and therefore signaling quality is good and handover is very
little.
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29
Indoor & outdoor Networking Strategy-1
Same frequency and different frequencies co-exist in the 3G network: when
constructing 3G indoor coverage system, networking scheme shall be made
based on actual condition. It’s ideal to combine same frequency scheme with
different frequencies scheme. If interference can be controlled, same frequency
is suggested; If interference is hard to be controlled, and hard handover can
fulfill KPI of indoor coverage system, different frequencies is better.
Suggested value of “interference can be controlled” is 10dB. Indoors, pilot power
of indoor coverage system is 10dB stronger than that of outdoor system;
outdoor, pilot power of outdoor BTS is 10dB stronger than that of indoors. For
environment with good isolation, same frequency is suggested; For environment
with poorer isolation and with capacity requirement, different frequencies
scheme is recommended.
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30
Indoor & outdoor networking strategy -2
Strictly control the interaction of indoors and outdoor signaling. Outdoor signaling
comes indoors along the window from top to bottom, while indoor signaling
penetrates through the window and come outside. High-level signaling comes into
the air and with small effect, thus focus shall be to avoid the indoor signaling
entering the outside surrouding roads. To avoid the interaction of signaling of both
indoors and outdoor, it’s suggested:
Control the strong coverage of outdoor signaling indoors. Adjust the transmission power
of outdoor cells, add to antenna downtilt or adjust directional angle of the antennae.
Control the leakage of indoor signaling. Properly distribute indoor antennae. Generally,
avoid using omni antenna near the window and use directional antenna pointing indoors.
For scenes in which signaling leakage is frequent and easy, it’s recommended to add
antenna point and reduce transmission power of antenna points for even distribution of
signaling.
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31
It’s recommended to perform soft handover to ensure the successful handover
between different floors, rooms and lifts, and different enclosures etc.
Handover area of entrances and exits shall be properly set. If performing hard
handover, signaling of entrances & exits of the lobby and garage shall be
controlled, and optimized if necessary to ensure smooth transition of signaling
and success handover.
In the lobby, penetrating signaling from outdoor is strong. It’s recommended to
induce transit cells to ensure successful handover and to avoid hard handover
of lift when signaling from outside enters indoors. Add cells with frequency the
same as outdoors and two frequencies have coverage in entrances and exits.
For indoor and outdoor networking, handover area of indoor and outdoor
signaling is near the inside door and that of entrances and exits of garages is
near the garage, and that of access to lifts is at the entrances to lifts, and
handover area of stairwell and other floors depends on actual condition.
Indoor & outdoor networking strategy-3
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32
Key points of indoor and outdoor Key points of indoor and outdoor interworking interworking
Outside signaling penetrates indoors
2/3G distributing system alternation
Indoor and outdoor networking strategies
Multiple cells classification of 3G IDS
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33
Multiple cells classification of 3G IDS
A WCDMA indoor distribution system shall be divided into multiple cells to
fulfill coverage or capacity demand. And the following principles shall be
observed: Handover zones shall be as small as possible ; The coverage of first floor and lifts comes from the same cell. There are no
handover when entering or exiting from the lift to floor 1st.
Make multiple cells classification based on different scenario.
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Typical buildings Shenzhen Telecom Mansion is a building with 24 floors and
covers an area of 39483.9 square meters. It’s a typical building
of indoor coverage.
Multiple cells classification of Telecom Mansion is a horizontal
one. Utilize isolation of multiple cells to reduce handover
between cells and floor 1st and lower lifts belongs to one cell.
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35
Large complex
Large complex has large area, and stadium, airport and railway belong to this
group. Take Shenyang olympics stadium for example, it occupies 254,000 square
meters with 278 meter length, 235 meter width, and 82 meter heights. It has 6
floors and two-story stand and can hold 60, 000 population. Multiple cells of Shenyang Olymipics ZTE stadium are classified vertically and
handover area of cells in the same story shall be properly planned.
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36
Large Residence Community
Large residence community consists of multiple buildings and pure outdoor macro BTS
can hardly achieve full coverage and garden distributing system is necessary to be
introduced. Test result reveals that design concept of “multiple antenna, small power” can
provide complete coverage for outdoor environment of residential quarters and 1-6 storied
residence buildings. The antennae are noticeable.
Different colored curves symbolize different cells
Ensure WCDMA signaling can reach
the interior of buildings at one time
and by reducing antenna power,
coverage demand of buildings can
be met.
In order to reduce cell number, it’s
suggested to apply multi-RRU
single-cell technology to enable the
coverage capacity of single cells and
to absorb several buildings into one
cell.
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37
Subway
Use BBU plus RRU to make coverage of subways, and utilize existing cables
to enable WCDMA coverage expansion.
The concept of subway multiple cells classification is to consider platforms as
cell dividing points and to complete coverage by separate phases.
一级目录标题楷体 GB2312( 加粗 )
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24 ~ 28 号
Key Points of Coordinating Coverage ofKey Points of Coordinating Coverage ofIndoor & outdoorIndoor & outdoor
Key Points of Coordinating Coverage ofKey Points of Coordinating Coverage of Indoor & outdoorIndoor & outdoor
Cases of Coordinating Coverage of Indoor Cases of Coordinating Coverage of Indoor &outdoor&outdoor
Key Points of Coordinating Coverage ofKey Points of Coordinating Coverage ofIndoor & outdoorIndoor & outdoor
Key Points of Coordinating Coverage ofKey Points of Coordinating Coverage of Indoor & outdoorIndoor & outdoor
Cases of Coordinating Coverage of Indoor Cases of Coordinating Coverage of Indoor &outdoor&outdoor
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39
Cases of indoor and outdoor co-Cases of indoor and outdoor co-covering applicationcovering application
Introduction of outdoor environment
Priority of BBU+RRU network
Suggestions on indoor and outdoor network
二级目录标题楷体 GB2312( 加粗 )
Arial( 加粗 )红色 / 黑色24 ~ 28 号
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Surrounding Environment of Shenzhen Unicom Building We choose Shenzhen Unicom Building as one example Unicom Building lies in CBD area of center Futian district. It has dense
buildings here, height of buildings is height with average over 20 floors.
二级目录标题楷体 GB2312( 加粗 )
Arial( 加粗 )红色 / 黑色24 ~ 28 号
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Surrounding environment of Shenzhen Unicom Building Site on the top of Shenzhen Unicom building has four cells with antenna height
about 70 meters. The nearest site is centre site of China Telecom with 355
meters far away from it, which influences this site much.
We can see that Shenzhen Unicom Building has a complicated wireless
environment and can be on half of the case that co-coverage by indoor and
outdoor together has a restrict requirement about interference and capacity. So
we can take it as one example.
二级目录标题楷体 GB2312( 加粗 )
Arial( 加粗 )红色 / 黑色24 ~ 28 号
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Indoor environment of Shenzhen Unicom Building
Unicom building is a building with 24 floors over earth and totally 39483.9
square meters 。 Unicom building has a glass wall structure and a complicated indoor
environment. Floor B1:underground parking place. Dependent. Floor 1F:hall, vacant inside, spaces co-used by floor 1-3F, glass top, signals outside
can penetrate through the top Floor 5F:equipment room, a wide and open place.
二级目录标题楷体 GB2312( 加粗 )
Arial( 加粗 )红色 / 黑色24 ~ 28 号
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Indoor environment of Shenzhen Unicom Building
Indoor environment of Shenzhen Unicom: Floor 14F:offices,balcony and open top, people can take teas and have
meetings here Floor 19F:offices, a good open place Floor 24F:top floor, offices for CEO
二级目录标题楷体 GB2312( 加粗 )
Arial( 加粗 )红色 / 黑色24 ~ 28 号
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Cases of indoor and outdoor co-covering applicationCases of indoor and outdoor co-covering application
Introduction of outdoor environment
Priority of BBU+RRU network
Suggestions on indoor and outdoor network
二级目录标题楷体 GB2312( 加粗 )
Arial( 加粗 )红色 / 黑色24 ~ 28 号
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Changes of 2/3G co-used indoor distribution
Indoor coverage in Shenzhen Unicom Building use 3 cells and take the form of
BBU+RRU network. Feedback loss is reduced and coverage area is expanded
effectively.
Floor 5F and 7F are separation points, cell 1 covers floors under 4F(4F included) , cell 2
covers 16F to 5F(16F included), cell 3 covers 17F to 24F, soft handover area are
controlled within emergency stairs.
To make new WCDMA system by fully using GSM feedback part, investment is reduced
therefore.
二级目录标题楷体 GB2312( 加粗 )
Arial( 加粗 )红色 / 黑色24 ~ 28 号
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Introduction of BBU+RRU equipment ZXSDR D-B82000 distribution sites are used in Shenzhen Unicom Building and are consisted by base station unit B8200 and
radio remote unit R8840. Technique specification of it is as follows:
Type Item Specifics
Specifics of property
FrequenciesUplink : 1920MHz ~ 1980MHz Downlink : 2110MHz ~ 2170MHz
Capability
Max supported Sectors 24CS
Max supported carriers 4
Max supported CE channels for pure voice servicesuplink : 960CEdownlink : 960CE
Max channels in one cell 123
Max throughput of system 216Mbps
Output power of carrier
RF unit type Output power of equipment
R884040W
60W
Receiving Sensitivity-126.5dBm@WCDMA S antenna receiveing-129.2dBm@WCDMA D antenna receiving-131.9dBm@WCDMA Q antenna receiving
Physical property
Size of equipmentB8200尺寸( height×width×deep): 88.4×482.6×197 ( mm)R8840尺寸( height×width×deep): 370×320×160 ( mm)
Weight with full equipementB8200 : 8.75KGR8840 : 16.5KG
Power supply
property
Way of power supply, permitted ranges of voltage changes
B8200 : -48V DC ( ranges -57 V DC ~ -40V DC)R8840 : -48V DC ( ranges-35 V DC ~ -60 V DC)220V AC ( ranges 90 V AC ~ 300 V AC)110V AC ( expansion supported , ranges 85V AC ~ 135V AC)
二级目录标题楷体 GB2312( 加粗 )
Arial( 加粗 )红色 / 黑色24 ~ 28 号
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Priority of BBU+RRU-1
Versatile network BBU has a property of high integrity, large capability, less volume, light weight etc. BBU can
be places together, base band capability can be shared. It is suitable to indoor cases with
not-so-meanly-distributed and can enhance stability of system. RRU has a small volume, light weight and easy fixed. RRU can be used together with GSM
indoor distribution system. RRU uses fiber as transmission, feedback losses are reduced
effectively, which can reduce additive losses in 2GHZ and make RRU has the same
coverage as GSM. So, it is easy to make 2/3G together. BBU+RRU can realize coverage and capability planning individually. It is easy to expand
network, and changing indoor distribution system is not needed. It is used to meet the need
of services in 3G.
Merge of multiple RRU cells, coverage area are expanded effectively BBU+RRU support RRU single cell merge technique. Single cell support 1 to 6 RRU in
indoor situation, which expand coverage area of single cell and realize far coverage of many
buildings. This case can meet most situations of indoor coverage.
二级目录标题楷体 GB2312( 加粗 )
Arial( 加粗 )红色 / 黑色24 ~ 28 号
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Priority of BBU+RRU-2
Less work of project, low cost of operation and maintain BBU+RRU use fiber instead of feedback cable has a simple way of line distribution and is
easy to work on. RRU can afford all kinds of requirement of any situation and is not
reliable on trunk amplification. In real network trunk amplification can be given up or used
in only a few cases, so coverage quality decreasing caused by too much trunk
amplification can be avoided. BBU is set up integrally and can be managed and monitored by OMC. Traditional micro-
cell manner need to monitor trunk amplification excessively.
Change to co-usage is easy BBU+RRU way can distinguish cells reasonably and easily. Expansion later can be
finished by background network administration software. No necessary of further
changes in hardware. BBU,RRU can realize wall-hanging, and is convenient for indoor coverage realization
and application.
二级目录标题楷体 GB2312( 加粗 )
Arial( 加粗 )红色 / 黑色24 ~ 28 号
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Cases of indoor and outdoor co-covering applicationCases of indoor and outdoor co-covering application
Introduction of outdoor environment
Priority of BBU+RRU network
Suggestions on indoor and outdoor network
二级目录标题楷体 GB2312( 加粗 )
Arial( 加粗 )红色 / 黑色24 ~ 28 号
50
Suggestions of indoor and outdoor co-network
Top and nearby sites affect much on Shenzhen Unicom building for its glass
wall structure. Potential strong signals coverage come to live due to influence by
outside signals. But outside signals can not reach deep in the building.
Unicom building has a large capacity need. To make sure of indoor signals are
not affected by strong surrounding signals, we suggest Unicom building take
network form of different frequencies, that is using different frequencies indoor
and outside door, but the same frequencies in the building.
We can configure cells used by lower floors to dual-frequencies to make this cell
to be on transient cell: indoor and outside frequencies. When one user comes
indoor, user will switch to indoor cell with the same frequency and switch to
indoor cell with different frequencies. When user go out of indoor, compress
mode is activated, indoor cell with different frequencies transits to outdoor cell.