ZTE Corporation ZXG-BTS2 Manuale Utente
ZXG10-BTS (V2.9) Technical Manual
42
Confidential and Proprietary Information of ZTE CORPORATION
Before an MS sends a packet, PAGCH allocates one or more PDTCHs to
the MS for packet transfer. When the MS already works in the packet
transmission mode, the resources allocated can also be transferred in
transmission mode, the resources allocated can also be transferred in
the PACCH.
PNCH is used for notifying the MS of PTM-M calls. The DRX mode is
necessary for monitoring PNCH.
ii. Packet Broadcast Control Channel (PBCCH)
necessary for monitoring PNCH.
ii. Packet Broadcast Control Channel (PBCCH)
PBCCH broadcasts the PSI (Packet System Information) and the
parameters carried by PSI determine the mapping of all kinds of
channels on the multi-frames.
If no PBCCH is allocated, the information can also be transferred
over the BCCH.BCCH will clearly indicate whether the cell supports
channels on the multi-frames.
If no PBCCH is allocated, the information can also be transferred
over the BCCH.BCCH will clearly indicate whether the cell supports
packet data service. If the cell supports packet data service and
PBCCH is available, then the combined configuration information on
the PBCCH will be presented.
PBCCH is available, then the combined configuration information on
the PBCCH will be presented.
iii. Packet dedicated control channel
The PACCH transmits signaling information, such as confirmation and
power control. It also carries resource allocation and reallocation
messages, which can be used to allocate PDTCH capacity or add new
messages, which can be used to allocate PDTCH capacity or add new
PACCH in the future. When an MS is making packet transmission, it
can page via PACCH and enter the circuit switching mode. The PACCH
can page via PACCH and enter the circuit switching mode. The PACCH
is dynamically allocated to the physical channel which carries PDTCH.
It is a bidirectional channel.
It is a bidirectional channel.
PTCCH/U transfers the random access burst pulse and estimates the
time advance amount of an MS in the packet transmission mode.
The period of PTCCH/U is 8 52-multiframes, including 16 PTCCH/U sub-
The period of PTCCH/U is 8 52-multiframes, including 16 PTCCH/U sub-
channels. The PTCCH/U sub-channel number possessed by each MS is
determined by the TAI (Time Advance Index) obtained by the MS in
determined by the TAI (Time Advance Index) obtained by the MS in
resource allocation.
Figure 1-6 shows the mapping of PTCCH/U on the physical channel.
Figure 1-6 shows the mapping of PTCCH/U on the physical channel.
PTCCH/D is used to correct the time lead of several MSs.
One PTCCH/D corresponds to several PTCCH/U.
PTCCH/D is interleaved on four bursts.
Figure 20 shows the mapping of PTCCH/D on the physical channel.
One PTCCH/D corresponds to several PTCCH/U.
PTCCH/D is interleaved on four bursts.
Figure 20 shows the mapping of PTCCH/D on the physical channel.