General Architecture
A BTS in general has the following parts:
- Transceiver (TRX)
- Quite widely referred to as the driver receiver (DRX), DRX are either in the form of single (sTRU), double(dTRU) or a composite double radio unit (DRU). It basically does transmission and reception of signals. It also does sending and reception of signals to and from higher network entities (like the base station controller in mobile telephony).
- Power amplifier (PA)
- Amplifies the signal from DRX for transmission through antenna; may be integrated with DRX.
- Combiner
- Combines feeds from several DRXs so that they could be sent out through a single antenna. Allows for a reduction in the number of antenna used.
- Duplexer
- For separating sending and receiving signals to/from antenna. Does sending and receiving signals through the same antenna ports (cables to antenna).
- Antenna
- This is the structure that lies underneath the BTS; it can be installed as it is or disguised in some way (Concealed cell sites).
- Alarm extension system
- Collects working status alarms of various units in the BTS and extends them to operations and maintenance (O&M) monitoring stations.
- Control function
- Controls and manages the various units of BTS, including any software. On-the-spot configurations, status changes, software upgrades, etc. are done through the control function.
- Baseband receiver unit (BBxx)
- Frequency hopping, signal DSP, etc.
Read more about this topic: Base Transceiver Station
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