ZTE Corporation ZXG-BTS2 Manuale Utente

 
ZXG10-BTS (V2.9) Technical Manual 

Confidential and Proprietary Information of ZTE CORPORATION  

Physical channels are shared in the unit of block; that is, the type of 

logical channel to which each block on a PDCH belongs may change from 
block to block. Channel type is the message type ID contained in the head 

of a block (except for PRACH). 

For each PDCH allocated to the MS, MS will be allocated with an USF 
(Uplink State Flag). 

On the network, the USF controls the multiplexing of radio blocks of 
multiple MSs on the PDCH. 

USF is at the head of each downlink radio block and points to the next 
uplink radio block. 

If the MS finds its own USF at the head of a downlink block of a PDCH, 
then the MS can use the B

X+1 

(if X ≠ 11) or B

0 

(if X = 11) uplink block in 

the PDCH. If the network permits, the MS can also use three consecutive 
blocks. 

In the downlink, the MS reads every downlink block in the allocated PDCH 

and judges whether the block belongs to itself according to TFI (the ID 
allocated to the MS). 

Burst Pulse Sequence 

Burst pulse sequence refers to the information bit stream sent by the BTS 

or MS in any TS.   

A burst period is a timeslot, which is about 577 µs, containing 156.25 bits. 

Different bits are differentiated by BNs (Bit Numbers), for example BN = 0, 
1, …, or 156.  

The transmission time of burst pulse within a timeslot depends on the BN. 

The transmission starts from the low bit, that is, from BN0.  

Figure 21 shows the time-amplitude of the burst pulse sequence. It 

indicates the acceptable restriction range. The constant amplitude lasts 
147 bits, that is, 142 information bits plus two 2.5bits on both sides.