Failed Outgoing External Inter-Cell Handovers

Measurement Counter

CH332:CELL_INTERBSC_OUTCELL_HO_FAIL

Description

The outgoing external inter-cell handover may fail due to various reasons.

This measurement provides the number of failed outgoing external inter-cell handovers initiated by the BSC. The measurement is performed based on the originating cell and involves directed retry handovers and handovers excluding directed retry. The measurement also involves handovers between the frequency bands as listed in Table 1.

**Table 1** Relations between counters and the frequency bands of the originating cell and the target cell
Frequency Band of the Originating Cell	Frequency Band of the Target Cell	Counter
GSM900, GSM900&DCS1800, GSM850, GSM850&DCS1800, GSM850&PCS1900	GSM900, GSM900&DCS1800, GSM850, GSM850&DCS1800, GSM850&PCS1900	900_900
GSM900, GSM900&DCS1800, GSM850, GSM850&DCS1800, GSM850&PCS1900	DCS1800, PCS1900	900_1800
DCS1800, PCS1900	GSM900, GSM900&DCS1800, GSM850, GSM850&DCS1800, GSM850&PCS1900	1800_900
DCS1800, PCS1900	DCS1800, PCS1900	1800_1800

Unit

Integer number or integer.

Measurement Point

At point A, B, C, D, E, and F, as shown in Figure 1 and Figure 2, the counter is measured when an outgoing external inter-cell handover fails.

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 = [Failed Outgoing External Inter-Cell Handovers (SDCCH) (Excluding Directed Retry) (900/850-900/850)] +

[Failed Outgoing External Inter-Cell Handovers (SDCCH) (1800/1900-1800/1900)] +

[Failed Outgoing External Inter-Cell Handovers (SDCCH) (900/850-1800/1900)] +

[Failed Outgoing External Inter-Cell Handovers (SDCCH) (1800/1900-900/850)] +

[Failed Outgoing External Inter-Cell Handovers (TCHF) (900/850-900/850)] +

[Failed Outgoing External Inter-Cell Handovers (TCHF) (1800/1900-1800/1900)] +

[Failed Outgoing External Inter-Cell Handovers (TCHF) (900/850-1800/1900)] +

[Failed Outgoing External Inter-Cell Handovers (TCHF) (1800/1900-900/850)] +

[Failed Outgoing External Inter-Cell Handovers (TCHH) (900/850-900/850)] +

[Failed Outgoing External Inter-Cell Handovers (TCHH) (1800/1900-1800/1900)] +

[Failed Outgoing External Inter-Cell Handovers (TCHH) (900/850-1800/1900)] +

[Failed Outgoing External Inter-Cell Handovers (TCHH) (1800/1900-900/850)] +

[Failed Outgoing External Inter-Cell Handovers (Directed Retry) (900/850-900/850)] +

[Failed Outgoing External Inter-Cell Handovers (Directed Retry) (1800/1900-1800/1900)] +

[Failed Outgoing External Inter-Cell Handovers (Directed Retry) (900/850-1800/1900)] +

[Failed Outgoing External Inter-Cell Handovers (Directed Retry) (1800/1900-900/850)]