Failed Outgoing External Inter-Cell Handovers (Handover Request Rejected)

Measurement Counter

CH332K:CELL_INTERBSC_OUTCELL_HO_FAIL_REQ_REJ

Description

This measurement provides the number of failed outgoing external inter-cell handovers because the BSC receives the HO RQD REJ message from the MSC. The cause carried in the HO RQD REJ message can be:

OM intervention
Equipment failure
No radio resource available
Requested terrestrial resource unavailable
BSS not equipped
Invalid cell
Requested transcoding/rate adaption unavailable
Circuit pool mismatch
Requested speech version unavailable
Ciphering algorithm not supported
Terrestrial circuit already allocated
Invalid message
Protocol error between BSS and MSC
Other causes

Unit

Integer number or integer.

Measurement Point

As shown in Figure 1 and Figure 2, the counter is measured at A when the BSC receives the HO RQD REJ message from the MSC.

Figure 1 Measurement of the counters related to failed outgoing external inter-cell handover (excluding directed retry)

Figure 2 Measurement of the counters related to failed outgoing external inter-cell handover (directed retry)

Formula

Failed Outgoing External Inter-Cell Handovers (Handover Request Rejected) = [Failed Outgoing External Inter-Cell Handovers (Handover Request Rejected) (OM Intervention)] +

[Failed Outgoing External Inter-Cell Handovers (Handover Request Rejected) (Equipment Failure)] +

[Failed Outgoing External Inter-Cell Handovers (Handover Request Rejected) (No Radio Resource Available)] +

[Failed Outgoing External Inter-Cell Handovers (Handover Request Rejected) (Requested Terrestrial Resource Unavailable)] +

[Failed Outgoing External Inter-Cell Handovers (Handover Request Rejected) (BSS not Equipped)] +

[Failed Outgoing External Inter-Cell Handovers (Handover Request Rejected) (Invalid Cell)] +

[Failed Outgoing External Inter-Cell Handovers (Handover Request Rejected) (Requested Transcoding/Rate Adaption Unavailable)] +

[Failed Outgoing External Inter-Cell Handovers (Handover Request Rejected) (Circuit Pool Mismatch)] +

[Failed Outgoing External Inter-Cell Handovers (Handover Request Rejected) (Requested Speech Version Unavailable)] +

[Failed Outgoing External Inter-Cell Handovers (Handover Request Rejected) (Ciphering Algorithm not Supported)] +

[Failed Outgoing External Inter-Cell Handovers (Handover Request Rejected) (Terrestrial Circuit Already Allocated)] +

[Failed Outgoing External Inter-Cell Handovers (Handover Request Rejected) (Invalid Message)] +

[Failed Outgoing External Inter-Cell Handovers (Handover Request Rejected) (Protocol Error between BSS and MSC)] +

[Failed Outgoing External Inter-Cell Handovers (Handover Request Rejected) (Other Causes)]