Measurement Counter
ZCH932D:BSCRPT_INTERBSC_OUTCELL_HO_FAIL_RECONN_SUCC
Description
This measurement provides the number of successful reconnection to old channels upon external outgoing cell handover failure in all the cells controlled by a BSC. The types of channel include SDCCH, TCHF, and TCHH.
In the outgoing external inter-cell handover procedure, the BSC sends an HO CMD message to the MS through the source cell and initiates a timer to wait for an HO CMP message. If the MS reconnects to the old channel and sends an HO FAIL message on the old channel before the timer expires, the measurement is triggered when the failure cause is Other Causes. The measurement object is the target cell.
The handover can be performed between GSM900/850 and GSM900/850, between GSM1800/1900 and GSM1800/1900, between GSM900/850 and GSM1800/1900, or between GSM1800/1900 and GSM900/850.
The handover between different signaling points in a BSC is also called outgoing external inter-cell handover.
Abnormal release, unspecified
Abnormal release, channel unacceptable
Abnormal release, timer expired
Abnormal release, no activity on the radio path
Preemptive release
Handover impossible, timing advance out of range
Channel mode unavailable
Frequency not implemented
Call already cleared
Semantically incorrect message
-
Invalid mandatory information
Message type non-existent or not implemented
-
Message type not compatible with protocol state
Conditional IE error
No cell allocation available
Protocol error unspecified
Other
Unit
Integer number or integer.
Measurement Point
This counter is measured according to the following formula when the measurement period ends. For details on the measurement point, see "Measurement Point" of each counter in the formula.
Formula
Successful Reconnections to Old Channels upon External Outgoing Cell Handover Failure per BSC =
Failed Outgoing External Inter-Cell Handovers (Reconnection to Old Channels) (Abnormal
Release, Unspecified) +
Failed Outgoing External Inter-Cell Handovers (Reconnection to Old Channels) (Abnormal Release, Channel Unacceptable) +
Failed Outgoing External Inter-Cell
Handovers (Reconnection to Old Channels) (Abnormal Release, Timer Expired) +
Failed Outgoing External Inter-Cell Handovers (Reconnection to Old Channels) (Abnormal Release, No Activity on the Radio Path) +
Failed Outgoing External Inter-Cell Handovers (Reconnection to Old Channels) (Preemptive Release) +
Failed Outgoing External Inter-Cell Handovers (Reconnection to Old Channels) (Handover
Failed, Timing Advance out of Range) +
Failed Outgoing External Inter-Cell Handovers (Reconnection to Old Channels) (Channel Mode Unavailable) +
Failed Outgoing External Inter-Cell
Handovers (Reconnection to Old Channels) (Frequency Unavailable) +
Failed Outgoing External Inter-Cell Handovers (Reconnection to Old Channels) (Call Already Cleared) +
Failed
Outgoing External Inter-Cell Handovers (Reconnection to Old Channels) (Semantically Incorrect Message) +
Failed Outgoing External Inter-Cell Handovers (Reconnection to Old Channels) (Invalid Mandatory Information)
+
Failed Outgoing External Inter-Cell Handovers (Reconnection to Old Channels) (Message Type Non-existent or Not Implemented) +
Failed Outgoing External Inter-Cell Handovers
(Reconnection to Old Channels) (Message Type Not Compatible with Protocol State) +
Failed Outgoing External Inter-Cell Handovers (Reconnection to Old Channels) (Conditional IE Error) +
Failed Outgoing External Inter-Cell Handovers (Reconnection to Old Channels) (No Cell Allocation Available) +
Failed Outgoing External Inter-Cell Handovers (Reconnection to Old Channels) (Protocol Error
Unspecified) +
Failed Outgoing External Inter-Cell Handovers (Reconnection to Old Channels) (Other Causes)