Zte ZXG10 OB06, Technical Manual

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ZXG10 OB06 ZTE Integrated Outdoor GSM Base Station Technical Manual
56 Confidential and Proprietary Information of ZTE CORPORATION
2. Wireless channel release
The wireless channel release procedure is shown in Figure 41.
F
I G U R E
4 1 W
I R E L E S S
C
H A N N E L
R
E L E A S E
MS LAPDm FURRM HPIMan LAPD
BSC OAMM
( RF CHAN REL)
DL_DATA _IND (RF CHAN REL )
M PH_RRCm dTo
CHP ( CHP RF
CHAN REL)
M PH_ CHPIndToRR
( CHP RF CHAN
REL ACK)
DL _DATA_REQ
( RF CHAN REL ACK )
( RF CHAN
REL ACK)
The BSC releases a wireless link that is not used any longer.
When an activated wireless channel is not used any longer, the BSC
will send a RF channel release message (RF CHAN REL) to the related
TRX and channel. The CHP module processes the channel release.
When the related resources are released, the OB06 returns a RF
channel release acknowledgement message (RF CHAN REL ACK) to the
BSC. If the CHP cannot release the channel successfully, the FURRM
will send the ERROR REPORT message to the BSC.
SACCH Procedure
1. Measurement report
The data from the MS and OB06 measurement results are processed
by the BSC and will be used for the transmission power control and
handover preparation.
The MS measurement result is in the (RR) MEASurement REPort
message and will be reported once every SACCH block (480 ms), or if
the SACCH is being used by other signaling, reported once every two
SACCH blocks (960 ms). The TRX measures the level and quality of the
received signals in the current uplink channel. The average time is the
period of one SACCH block. The (RR) MEASurement REPort message
that is sent by the MS to the OB06 contains the measurement results
for the dedicated channel and adjacent cells.
The OB06 and MS measurement results form basic original data that
must be transmitted on the Abis interface. See “Basic measurement
report” for details. In addition, the OB06 and BSC also support
preprocessing for these basic measurement data in OB06, to lessen the
signaling load on the Abis interface. See “Measurement report
preprocessing” for details.
The FURRM receives the CHP measurement report ahead of the MS
measurement report. As a result, when the FURRM triggers group
sending of the Abis MEAS RESULT according to the CHP measurement
report, the problem of timing adjustment arises.