5. BBU 9500
• Battery back up both for +24 V DC
or -48 V DC
• Available for outdoor RBSs
• Two different optional battery
types:
– 110 Ah or 170 Ah
• Cooling and heating in the door
• Roxtec cable entries
6. Examples of new HW Units
FU12
21
Ant A
Ant B
RX A1
Ctrl
TX A
RX A2
2100
F
O
I
RX B1
RU21
2120
TX
RX B
RX A
Data
FU Ctrl
Power
F
O
I
All TX
2100
RU22
1940
TX
RX B
RX A
Data A
FU Ctrl
Power
F
O
I
All TX
Data B
1900
F
O
I
DC
in
EC
bus
ET
1-2
ET
3-4
GPS
Test
Enet
CBU1
CBU
- Control Base Unit
RU
- Radio Unit
FU
- Filter Unit
7. Smart antenna control
• Remote Electrical Tilt – RET
– Effective network tuning
– Powered by FU.
– Minimizes interference -> lower noise floor ->
increases capacity
– Connected to ASC
• Antenna System Controller – ASC
– Increased up-link performance
– Fully integrated into the RBS 3000
– Improves system noise figure
– Improves in building coverage
– Acts as a TMA
8. Capacity and coverage
• WCDMA characteristics (soft
capacity) gives flexibility between
coverage, capacity and quality
Lower capacity, increased coverage
Higher capacity, less coverage
9. The new Macro:RBS 3206/3106
• RBS 3206/3106 mainly
target high capacity and
high coverage
applications
• The new RBS 3206/3106
has a significantly
improved structure as a 1
cabinet solution.
RBS 3106/3206
RBS 3101/3202
Indoor
solutions
Main-Remote
RBS 3402
Compact
RBS 3203
RBS 3104
Micro
RBS 3303
Coverage
Capacity
10. • Example of power levels when different
services from different terminals are
combined
Power levels from UE
CA
CB
CC
CD
Received power levels at the base station
Power is the common shared
resource
Internet
Access
Video
Multi RAB
File down
loads
Coverage, Capacity & Quality
11. One cell frequency reuse
• In CDMA, all cells use the same carrier
frequency
– Frequency reuse = 1
– No frequency planning!
CDMA (reuse = 1)
512 codes
*There are available techniques for TDMA to achieve reuse=1 (fractional load planning)
Coverage, Capacity & Qualit
12. Code planning
512 unique codes
By having codes from different
code groups next to each other,UE
current consumption is reduced
64 groups with
8 codes each
Planning Issues
13. • Users separated by code
• Requires digital
transmission
• Normally wider bandwidth
compare to TDMA
• Used for WCDMA and IS-
95 (cdma1x &
CDMA2000)
• May be combined with
FDMA (more than one
carrier)
5 MHz (WCDMA)
1.25 MHz (IS-95)
time
frequency
code
Introduction
CDMA – Code division multiple
access
