ZTE Corporation ZXG-BTS2 Manuale Utente
ZXG10-BTS (V2.9) Technical Manual
74
Confidential and Proprietary Information of ZTE CORPORATION
The BSC releases a wireless link that is not used any longer.
When an activated wireless channel is not used any longer, the BSC
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.
TRX and channel. The CHP module processes the channel release.
When the related resources are released, the BTS returns a RF channel
release acknowledgement message (RF CHAN REL ACK) to the BSC. If
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.
the ERROR REPORT message to the BSC.
SACCH Procedure
1. Measurement report
The data from the MS and BTS 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
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
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
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 BTS contains the measurement results for
that is sent by the MS to the BTS contains the measurement results for
the dedicated channel and adjacent cells.
The BTS and MS measurement results form basic original data that
must be transmitted on the Abis interface. See “Basic measurement
The BTS 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 BTS and BSC also support
preprocessing for these basic measurement data in BTS, to lessen the
preprocessing for these basic measurement data in BTS, 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
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.
The basic measurement report is shown in Figure 51.
report, the problem of timing adjustment arises.
The basic measurement report is shown in Figure 51.
F
I G U R E
5 1
B
A S I C
M
E A S U R E M E N T
R
E P O R T
MS
LAPD
FURRM
HPIMa
LAPD
BSC
OAMM
Dm_DL_UNIT
DATA_REQ
(MEAS REP)
(MEAS REP)
DL_DATA_REQ (MEAS RES)
(MEAS RES)
MPH_CHPIndToRR
(CHP MEAS IND)
MPH_RRCmdToCHP
(CHP SET TA)