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

Measurement Counter

CH352K:CELL_INTERRAN_OUTCELL_HO_FAIL_REQ_REJ

Description

This counter provides the number of failed outgoing inter-RAT inter-cell handovers because the handover is terminated when the BSC receives the HO RQD REJ message from the MSC. The Cause contained 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

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

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

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

Formula

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

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

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

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

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

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

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

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

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

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

Failed Outgoing Inter-RAT Inter-Cell Handovers (Handover Request Rejected) (Terrestrial circuit already allocated)

[Failed Outgoing Inter-RAT Inter-Cell Handovers (Handover Request Rejected) (Invalid Message)} +

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

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