ZTE Corporation ZXG-BTS2 Manuale Utente
ZXG10-BTS (V2.9) Technical Manual
66
Confidential and Proprietary Information of ZTE CORPORATION
F
I G U R E
4 3
C
H A N N E L
A
C T I V A T I O N
F
A I L E D
MS
LAPDm
FURRM
HPIMa
LAPD
BSC
OAMM
(CHAN ACTIV)
MPH_RRCmdToC
HP (CHP CHAN
ACTIV)
(CHAN ACTIV NACK)
DL_DATA_REQ (CHAN
ACTIV NACK)
MPH_CHPIndToRR(CHP
CHAN ACTIV RESP
(NACK))
DL_DATA_IND (CHAN ACTIV)
The TRX detects the MS random access request on the RACH, and
activates a channel for the MS.
The BSC decides to use which channel, and sends the CHAN ACTIV
message to the TRX to enable that channel. This message contains the
activates a channel for the MS.
The BSC decides to use which channel, and sends the CHAN ACTIV
message to the TRX to enable that channel. This message contains the
activation reason (immediate assignment, allocation,
asynchronous/synchronous and additional allocation), channel ID and
asynchronous/synchronous and additional allocation), channel ID and
complete channel description (full/half rate, voice/data, code/rate
adaptation, frequency hopping sequence, key, etc.).If there is
encrypted information, it uses the encryption activation mode.
When the FURRM module receives the CHAN ACTIV message, it sends
related information unit (activation reason, etc.) contents to the CHP
adaptation, frequency hopping sequence, key, etc.).If there is
encrypted information, it uses the encryption activation mode.
When the FURRM module receives the CHAN ACTIV message, it sends
related information unit (activation reason, etc.) contents to the CHP
for processing through the HPIMan module, and reports the results to
the BSC when the response arrives.
When the channel is activated, the TRX responds with the CHAN ACTIV
ACK message that contains the number of the current frame with the
the BSC when the response arrives.
When the channel is activated, the TRX responds with the CHAN ACTIV
ACK message that contains the number of the current frame with the
BTS. The BSC uses this frame number to decide the Starting Time
parameter in the immediate assignment message that will be then sent
to the MS side.
If the TRX cannot activate the channel, it will return the CHAN ACTIV
NACK message that contains the failure cause. The reason may be
parameter in the immediate assignment message that will be then sent
to the MS side.
If the TRX cannot activate the channel, it will return the CHAN ACTIV
NACK message that contains the failure cause. The reason may be
O&M interference (channel blocked, for example), no resource (no
voice encoder, for example), equipment error, channel activated, etc.
voice encoder, for example), equipment error, channel activated, etc.
2. Handover
The handover flow is shown in Figure 44.