ZTE Corporation ZXG-BTS2 Manuale Utente

 
 

Chapter 4 - System Functions 

Confidential and Proprietary Information of ZTE CORPORATION 57 

Power Control 

The BTS can provide static power control, dynamic power control and idle 
timeslot transmitting shutoff functions. 

The static power control enables the user to adjust the BTS coverage. The 
static power control range is up to 12 dB, 2dB per step. 

The dynamical power control means that the BSC can adjust the BTS 
transmit power according to the distance between mobile subscribers and 

BS. The dynamical power control range is up to 30dB, 2dB per step.  

In case of idle timeslot, since there is no downlink signal, the BSC 
commands the BTS to shut off the transmitting power of that timeslot.  

These power control functions above increase the efficiency of the BTS 
transmitter and reliability of the power amplifier, and minimize the 

transmitter interference. 

Baseband Processing 

The baseband processing implements the function of the physical layer on 
the Um interface, processing all full-duplex channel baseband data on one 

TDMA frame. 

In the downlink direction, the baseband processing involves rate 

adaptation, channel coding and interweaving, encryption, and generation 
of TDMA burst pulse;  

In the uplink direction, it involves digital demodulation, decryption, 
deinterleaving, channel decoding and rate adaptation.  

Signaling Processing 

The BTS signaling processing implements the following two functions:  

1.  Interconnection between the MS and BSS/NSS on the Um interface 

layer 

2.  Management of some radio resources under control of the BSC 
Specifically, the BTS signaling processing functions are wireless link layer 
management function, dedicated channel management function, common 

channel management function and TRX management function. 

Wireless Link Management Function 

This function supports the following procedures: