Measurement Counter
R3820:CELL_LOCALSWITCH_LOOP_FAIL_NO_LOOP_POLICY
Description
After the call is put through or the incoming BSC handover for the speech service is complete, the BSC selects the BSS local switch policy, determines whether the conditions for initiating local switch are met, and performs local switch call detection in the local loopback procedure. If all the local switch conditions are met, within the BSC, the call processing module initiating loopback start at one end sends a loopback request message to the call processing module at the peer end. The call processing module at the peer end, however, selects the BSS local switch policy. If it is detected that the loopback policy is unavailable at the peer end, the call processing module responds to the call processing module at the TX end with a loopback acknowledgement message, with the cause value of unavailable loopback policy. Then, the loopback start fails.
This measurement provides the number of loopback start failures due to unavailable loopback policy.
Unit
Integer number or integer.
Measurement Point
After the BSC receives the CONNECT ACK message from the MSC in the MS terminated call procedure, as shown in Figure 1(A1), or after the BSC receives the HANDOVER CMP message from the MS in the incoming BSC handover procedure, as shown in Figure 2 (B1), the BSC selects the BSS local switch policy, determines whether the conditions for initiating the local switch are met, and performs local switch call detection. If all the local switch conditions are met, within the BSC, the call processing module initiating loopback start at one end sends a loopback request message to the call processing module at the peer end. The call processing module at the peer end, however, selects the BSS local switch strategy. If it is detected that the loopback strategy is unavailable at the peer end, the call processing module responds to the call processing module at the TX end with a loopback acknowledgement message, with the cause value of unavailable loopback strategy. Then, the loopback start fails. In this case, this counter is measured in the cell where the loopback start is initiated.
Formula
This is an original counter without involving any formula.