ZTE Corporation ZXG-OB06 用户手册
Chapter 4 - System Functions
Confidential and Proprietary Information of ZTE CORPORATION 49
A channel activation failure is shown in Figure 34.
F
I G U R E
3 4
F
A I L U R E O F
C
H A N N E L
A
C T I V A T I O N
MS
LAPDm
FURRM
HPIMan
LAPD
BSC
OAMM
(CHAN ACTIV)
M PH_RRCm dTo
C HP (CHP
CHAN ACTIV)
(CHAN ACTIV
NACK)
DL_ DATA_REQ (CHAN
ACTIV NACK)
M PH_ C HPIndToRR(CHP
CHAN ACTIV R ESP
(NACK))
DL_DATA _IND(C HAN ACTIV)
The TRX detects the MS random access request on the RACH, and
activates a channel for the MS.
The BSC decides the channel to be used, 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 the channel to be used, 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 complete
/synchronous and additional allocation), channel ID and complete
channel description (full/half rate, voice/data, code/rate adaptation,
frequency hopping sequence, key, and so on). 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, and so on) contents to the
frequency hopping sequence, key, and so on). 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, and so on) 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
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
OB06. 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. Possible failure causes
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. Possible failure causes
are O&M interference (channel blocked, for example), resource
unavailability (without voice encoder, for example), equipment error,
unavailability (without voice encoder, for example), equipment error,
and channel activated.