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Subway-BTS
Feature
* Configurable for Omni
- Improves cell capacity and frequency allocation at shadow areas golf
area, etc.
* Structured for minimized
- Provides multi- frequency and high capacity service
* Dynamic Power Control
- Four methods are used :
Reverse link open loop power control
Reverse link closed loop power control
Reverse link outer loop power control
Forward link power control
- This feature is performed by 1.25 mesc. and 0.5dB unit
* Real Time Operating System
- Satisfies the need for real time multi-processing
* Cell Power Minimization and Low Power Consumption
- Designed for flexible coverage over a radius from 100 meters to 48 kilometers
* Effective Structure for Dynamic Configuration and Management
* Self- contained enclosure including rectifier and Batteries
Functions
* Packet Interface with BSC
* Signaling for Originated/Terminated Call to MS
* CDMA Signaling Processing
* Execution of variable Hand-off
* Support of Power Control
* QPSK Modulation & Demodulation
* High Power Amplifier (HPA)
* Low Noise Amplifier (LNA)
* Real Time Error Detection and Handling
* CAI Test
- Collection of Data on CAI Test
- Support of Remote Control
- Dynamic Cell Control
Cell Blossoming
Cell Wilting
Cell Breathing
Cell Shrinking & Unshrinking
TPTL (Transmit Power Tracking Loop)
* Management and Control of Resources in BTS
* Operation & Maintenance through BSM
* Multiple Antenna Option (LCX ,Yagi Antenna ,Optical
Antenna)
Specifications
* H/W Configurations
- Digital Unit (DU)
- BTS Interconnection Unit (BIU)
- BTS Control Processor (BCP)
- Radio Frequency Unit (RFU)
- Time and Frequency Unit (TFU)
* Capacity
- Maximum Frequency Assignment:1 FA
- Maximum Sector : 1 Sector
- Traffic Channel : More than 24 Channels/sector
- Pilot/Sync/Access channels : More than 1 Channel/sector
- Paging Channel : More than 1 Channel/sector
- Traffic Capacity : 16.6 Erlang (Blocking Rate=2%)/(1 FA)
- Subscribers : 692/1 Sector (1 FA)
* Power
- DC:+24V Normal (Variable Range: 21V~30V)
- Battery Interworking
* Physical Dimensions
- 1,000 x 485 x 500 mm (H x W x D)
* Standard of Interface
- Interface with BSC : Nonchannelized
E1/T1
- Interface with MS : IS-95 CAI
* RF Transmitter
- Frequency Range : 869-894 MHz
- Channel Bandwidth 1.25 MHz
- Number of Code Channel : 64 Channe1/1.25 MHz
- Modulation Method : QPSK (Quadrature Phase Shift Keying)
- Output Power : Average Power less than 25W/CDMA Channel Bandwidth
* RF Receiver
- Frequency Range : 824~849M Hz
- Channel Bandwidth : 1.25MHz
- Sensitivity : Less than FER 1 %
- Receive ANT. Diversity : 2
- Maximum Input Signal Power
Operating Power : -65.OdBm
Limited Power : 0.0 dBm
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