Measurement of Outgoing Inter-RAT Inter-Cell Handover Commands

Measurement Counter

H3510:CELL_INTERRAN_OUTCELL_HO_CMD_NOT_INCLUDE_DR_SD

H3517:CELL_INTERRAN_OUTCELL_HO_CMD_TCHF

H3518:CELL_INTERRAN_OUTCELL_HO_CMD_TCHH

H351Aa:CELL_INTERRAN_OUTCELL_HO_CMD_BSC_LOOP

H351Ab:CELL_INTERRAN_OUTCELL_HO_CMD_BTS_LOOP

Description

In the outgoing inter-RAT inter-cell handover procedure, the BSC sends the MS the HO CMD message through the originating cell after receiving the HO CMD message from the MSC. The specific counter provides the number of outgoing inter-RAT inter-cell handover commands sent by the BSC in the originating cell. Together with the Outgoing Inter-RAT Inter-Cell Handover Requests and the Failed Outgoing Inter-RAT Inter-Cell Handovers, this counter determines the performance of the outgoing inter-RAT inter-cell handover.

The following counter provides the number of outgoing inter-RAT inter-cell handover commands (excluding directed retry), when the BSC sends the HO CMD message to the MS and the MS seizes an SDCCH before the handover:

H3510:CELL_INTERRAN_OUTCELL_HO_CMD_NOT_INCLUDE_DR_SD

The following two counters provide respectively the number of outgoing inter-RAT inter-cell handover commands when the MS seizes a TCHF or a TCHH before the handover. In this measurement, both the handovers initiated by directed retry and those initiated according to the handover algorithms based on the measurement reports are included.

H3517:CELL_INTERRAN_OUTCELL_HO_CMD_TCHF
H3518:CELL_INTERRAN_OUTCELL_HO_CMD_TCHH

If the BSC enables the local switching function, then the calls that meet the local switching condition of the BSC use the local switching function of the BSC for the conversation and those that meet the local switching condition of the BTS use the local switching function of the BTS for the conversation.

The following counters provide the numbers of outgoing inter-RAT inter-cell handover commands respectively for the calls using the BSC local switch and those using the BTS local switch. They are measured when the BSC sends the HO CMD message to the MS.

H351Aa:CELL_INTERRAN_OUTCELL_HO_CMD_BSC_LOOP
H351Ab:CELL_INTERRAN_OUTCELL_HO_CMD_BTS_LOOP

Unit

Integer number or integer.

Measurement Point

As shown in Figure 1 and Figure 2, the counter is measured at B when the BSC sends the HO CMD message to the MS.

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

A	Measurement point of Outgoing Inter-RAT Inter-Cell Handover Requests (Excluding Directed Retry)
B	Measurement point of Outgoing Inter-RAT Inter-Cell Handover Commands (Excluding Directed Retry)
C	Measurement point of Successful Outgoing Inter-RAT Inter-Cell Handovers (Excluding Directed Retry)

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

A	Measurement point of Outgoing Inter-RAT Inter-Cell Handover Requests (Directed Retry)
B	Measurement point of Outgoing Inter-RAT Inter-Cell Handover Commands (Directed Retry)
C	Measurement point of Successful Outgoing Inter-RAT Inter-Cell Handovers (Directed Retry)

Formula

This is an original counter without involving any formula.