ZTE Corporation ZXG-BTS2 Manuale Utente

 
 

Chapter 3 - Interfaces and Communications 

Confidential and Proprietary Information of ZTE CORPORATION 41 

One TN0 group: FCCH + SCH + BCCH + CCCH 
One TN2 group, one TN4 group and one TN6 group: BCCH + CCCH 
Five SDCCH/8 (0, …, 7) + SACCH/C8 (0, …, 7) 
87 TCH/F + FACCH/F + SACCH/TF  

PS Logic Channel 

By function, packet logical channels are divided into packet data 

transmission channel (PDTCH) and packet control channel (PCCH). 

1. PDTCH 

Unlike the circuit service, all PDTCHs in the packet service are 
unidirectional; that is, the up link and down link are independent of 

each other. 
PDTCHs include PDTCH/U (uplink) and PDTCH/D (downlink). 
PDTCHs carry user data. They are allocated temporarily to a specific 
MS or a group of MSs. In multi-timeslot mode, an MS can use at most 
eight PDTCHs at the same time. 
PDTCH/U  is  used  by  MS  to  send  packet  data  to  the  network  and 
PDTCH/D is used by the MS to receive packet data from the network. 

2. PCCH 

PCCHs are listed in Table 4. 

Packet random access channel (PRACH) (uplink) 

Packet paging channel (PPCH) (downlink) 

Packet access granted channel (PAGCH) (downlink) 

Packet Common 
Control Channel 
(PCCCH) 

Packet notification channel (PNCH) (downlink) 

Packet Broadcast 
Control Channel 
(PBCCH) 

PBCCH (downlink) 

Packet Associated Control Channel (PACCH) 

Packet time lead control channel (PTCCH/U) (uplink) 

PCCH 

Packet dedicated 
control channel 

Packet time lead control channel (PTCCH/U) 
(downlink) 

 

i.  Packet Common Control Channel (PCCCH) 

 

PRACH sends packet access burst pulse and extended access burst 
pulse or responds to BSS paging. 

 

PPCH is used for both CS paging and PS paging, but CS paging is only 

applicable to MS level-A and level-B.PPCH also uses paging group and 
can support DRX.