Measurement Counter
A3147A: CELL_CHMD_CMD_MOC_TCHF
A3147C: CELL_CHMD_CMD_MTC_TCHF
A3147D: CELL_CHMD_CMD_ECALL_TCHF
A3147E: CELL_CHMD_CMD_CALL_REEST_TCHF
A3148A: CELL_CHMD_CMD_MOC_TCHH
A3148C: CELL_CHMD_CMD_MTC_TCHH
A3148E: CELL_CHMD_CMD_CALL_REEST_TCHH
Description
In the immediate assignment procedure, if the cell does not have idle SDCCHs but has idle TCHs and the immediate assignment of TCHs is allowed by the data configuration of the BSC, the BSC assigns a TCHF or TCHH as a signaling channel to the MS. Upon receipt of an ASS REQ message from the MSC, the BSC does not need to assign a TCH to the MS but changes the TCHF or TCHH assigned in the immediate assignment procedure to a speech channel through the Mode Modify procedure, because the MS has already seized a TCH. In the Mode Modify procedure, the BSC sends a MODE MODIFY message to the BTS to instruct the BTS to modify the channel mode. If the BSC receives a MODE MODIFY ACK message indicating that the BTS channel mode is successfully modified from the BTS, the BSC sends a CHAN MODE MODIFY message to the MS. After successfully modifying the channel mode, the MS reports a CHAN MODE MODIFY ACK message to the BSC. Upon receipt of the CHAN MODE MODIFY ACK message, the BSC sends an ASS CMP message to the MSC.
The counters indicate the numbers of CHAN MODE MODIFY messages sent by the BSC to the MS based on the MS access reason and the type of the channel currently seized by the MS. The access reason can be MOC, MTC, Emergency Call, or Call Re-establishment. The channel type can be TCHF or TCHH.
Unit
Integer number or integer.
Measurement Point
As shown in Figure 1, each time the BSC sends a CHAN MODE MODIFY to the MS (see measurement point E1), the corresponding counter is incremented by one based on the MS access reason and the type of the channel currently seized by the MS.
Formula
This is an original counter without involving any formula.