Agilent Technologies 8922M, S GSM manual Protocol Log of a Typical Call, Primitive

APPENDIX A

Protocol Log of a Typical Call

Protocol Log of a Typical Call

For brevity, the protocol log shown in the User’s Guide is in a shorter form than that presented by the HP/Agilent 37900D GSM 04.08 decoding option.

This is a protocol log of the Common Air Interface (CAI) for a typical call placed between the Agilent 8922M/S and a GSM Mobile Station. You are expected to be familiar with ETSI standards GSM 04.06 and 04.08 to understand these protocol logs. The logs are in a simplified format and contain the following information:

Source Layer -> Destination Layer,

PRIMITIVE,

Logical Channel (if any),

Data Link Frame Header,

Layer 3 Message Type,

Layer 3 Message Contents in hexidecimal,

TDMA Frame number.

The Service Access Points (SAP) in the BS (Agilent 8922M/S) that are recorded are:

Between CC and MM,

Between MM and RR,

Between RR and DL,

Between DL and PH.

The call is BS originated to a class II MS. Authentication and encryption are not used. The initial TCH is full rate on ARFCN 30 using timeslot 4. The intra-cell handover is to a hopping TCH using ARFCN 10, 62 and 114 with MAIO set to zero using timeslot 6. The inter-cell handover is back to the ARFCN 30 timeslot 4 TCH. The call is BS terminated. The BCCH/CCCH is using SD/4 organization on ARFCN

20.Paging mode is normal and DTX is off. Requested MS transmit level is 15. This is an early assignment call without use of start times. The MS in this case is using DL I frames for acknowledgement rather than \‘piggybacking\’ acknowledgement on following DL I frames. This is a Phase I MS and therefore only BM0 format BA, CA and MA tables are used.

Uplink traffic is in bold typeface, downlink traffic is in normal typeface.

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