6 Trace Types

12.083GPPSubscriber and equipment traceTS

6.1 MSC/BSS Trace Type

The Trace Type field contains the type of trace activated in the MSC or BSS. The trace type consists of the following components.

8

7

6

5

4

3

2

1

Priority

Indication

For future expansion (Set to 0)

BSS Record Type

MSC Record Type

Invoking Event

Table 1: Invoking Events

Bits

Invoking Events

2

1

0

0

MOC, MTC, SMS MO, SMS MT, SS, Location Updates, IMSI attach, IMSI detach

0

1

MOC, MTC, SMS_MO, SMS_MT, SS only

1

0

Location updates, IMSI attach IMSI detach only

1

1

Operator definable

If the "operator definable" option is selected, all subsequent Trace Record Types are deemed to be "operator definable". In this case the significance of bits 3‑6 are operator defined, however the significance of bit 8 remains "Priority Indication". In all cases, for GSM Phase 2 Network Elements the setting of the 7 shall not affect trace record generation.

Table 2: MSC Record Type

Bits

Record Type

4

3

0

0

Basic

0

1

Detailed (Optional)

1

0

Spare

1

1

No MSC Trace

Table 3: BSS Record Type

Bits

Record Type

6

5

0

0

Basic

0

1

Handover

1

0

Radio

1

1

No BSS Trace

Table 4: Priority Indication

Bit

Priority

8

0

No priority

1

Priority

This bitmap of the Trace Type is required to map onto the Trace Type as defined in GSM 09.02 as an Integer with 256 possible values. This is achieved by a binary to decimal conversion of the bitmap, where bit 8 has weight 128 and bit 1 has weight 1.

6.2 HLR Trace Type

The HLR Trace Type field contains the type of trace activated in the HLR. The trace type consists of the following components.

8

7

6

5

4

3

2

1

Priority

Indication

For future expansion (Set to 0)

HLR Record Type

Invoking Event

Table 5: Invoking Events

Bits

Invoking Events

2

1

0

0

All HLR Interactions

0

1

Spare

1

0

Spare

1

1

Operator definable

If the "operator definable" option is selected, all subsequent Trace Record Types are deemed to be "operator definable". In this case the significance of bits 3 and 4 are operator defined, however the significance of bit 8 remains "Priority Indication". In all cases, for GSM Phase 2 Network Elements the setting of bits 5‑7 shall not affect trace record generation.

Table 6: HLR Record Type

Bits

Record Type

4

3

0

0

Basic

0

1

Detailed

1

0

Spare

1

1

No HLR Trace

Table 7: Priority Indication

Bit

Priority

8

0

No priority

1

Priority

This bitmap of the Trace Type is only required in the HLR and is not required to be mapped onto any GSM 09.02 [6] or other Trace Types.