Assignment Requests Measurement Based on the Channel Type

Measurement Counter

A3100A: CELL_ASS_REQ_SIG_TCH

A3100B: CELL_ASS_REQ_TCHF_ONLY

A3100C: CELL_ASS_REQ_TCHH_ONLY

A3100D: CELL_ASS_REQ_TCHF_PREF_NOCHG

A3100E: CELL_ASS_REQ_TCHH_PREF_NOCHG

A3100F: CELL_ASS_REQ_TCH_NOCHG

A3100G: CELL_ASS_REQ_TCHF_PREF_CHG

A3100H: CELL_ASS_REQ_TCHH_PREF_CHG

A3100I: CELL_ASS_REQ_TCH_CHG

A3100K: CELL_ASS_REQ_SIG_SDCCH

Description

In the immediate assignment procedure, the BSS assigns a signaling channel to an MS. After the MS sets up an RR connection with the BSS, the MS sets up an MM connection and a CC connection to the MSC on this signaling channel. The MSC assigns an A interface circuit to the MS in the ASS REQ message based on the CC connection request from the MS and specifies the service type of this call and the type of the channel that can be assigned to the call. Upon receipt of the ASS REQ message from the MSC, the BSC assigns a proper channel for the access of the MS based on the service type and the channel type specified in the ASS REQ message. The service type can be one of the following three:

Signaling service
Speech service
Data service

When the channel assigned by the MSC is used for speech service, the assigned channel is one of the following types:

Full rate TCH channel Bm
Half rate TCH channel Lm
Full or Half rate TCH channel, Full rate preferred, changes between full rate and half rate allowed also after first channel allocation as a result of the request
Full or half rate TCH channel, half rate preferred, changes between full rate and half rate allowed also after first channel allocation as a result of the request
Full or half rate TCH channel, full rate preferred, changes between full rate and half rate not allowed after first channel allocation as a result of the request
Full or half rate TCH channel, half rate preferred, changes between full rate and half rate not allowed after first channel allocation as a result of the request
Full or half rate TCH channel, changes between full and half rate allowed also after first channel allocation as a result of the request
Full or half rate TCH channel, changes between full and half rate not allowed after first channel allocation as a result of the request

Huawei BSC supports all of the eight channel types.

When the channel assigned by the MSC is used for data services, the assigned channel is one of the following types: 

- Full rate TCH channel Bm
- Half rate TCH channel Lm
- Full or Half rate TCH channel, Full rate preferred, changes between full rate and half rate allowed also after first channel allocation as a result of the request
- Full or half rate TCH channel, half rate preferred, changes between full rate and half rate allowed also after first channel allocation as a result of the request
- Full or half rate TCH channel, full rate preferred, changes between full rate and half rate not allowed after first channel allocation as a result of the request
- Full or half rate TCH channel, half rate preferred, changes between full rate and half rate not allowed after first channel allocation as a result of the request
- Full rate TCH channels in a multislot configuration, changes of the radio interface rate per channel allowed after first channel allocation as a result of the request
- Full rate TCH channels in a multislot configuration, changes of the radio interface rate per channel not allowed after first channel allocation as a result of the request

Huawei BSC supports the first six channel types.

The measurement counters provide the numbers of ASS REQ messages received by the BSC based on the service type and the channel type in the ASS REQ messages.

The counter A3100A "CELL_ASS_REQ_SIG_TCH "and "A3100K: CELL_ASS_REQ_SIG_SDCCH" provides the number of ASS REQ messages received by the BSC, in which the service type indicates the signaling service.

The rest counters as listed below provide the numbers of ASS REQ messages received by the BSC, in which the service type indicates speech service or data service.

A3100B: CELL_ASS_REQ_TCHF_ONLY
A3100C: CELL_ASS_REQ_TCHH_ONLY
A3100D: CELL_ASS_REQ_TCHF_PREF_NOCHG
A3100E: CELL_ASS_REQ_TCHH_PREF_NOCHG
A3100F: CELL_ASS_REQ_TCH_NOCHG
A3100G: CELL_ASS_REQ_TCHF_PREF_CHG
A3100H: CELL_ASS_REQ_TCHH_PREF_CHG
A3100I: CELL_ASS_REQ_TCH_CHG

Unit

Integer number or integer.

Measurement Point

As shown inFigure 1 each time the BSC receives an ASS REQ message from the MSC (see measurement point A), the corresponding counter is incremented by one based on the service type and the channel type specified in the ASS REQ message.

Figure 1 Measurement point of assignment requests

Formula

This is an original counter without involving any formula.