diff options
Diffstat (limited to 'pcu/PCU_Tests.ttcn')
| -rw-r--r-- | pcu/PCU_Tests.ttcn | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/pcu/PCU_Tests.ttcn b/pcu/PCU_Tests.ttcn index d8447369..9829edb1 100644 --- a/pcu/PCU_Tests.ttcn +++ b/pcu/PCU_Tests.ttcn @@ -4858,7 +4858,22 @@ testcase TC_pcuif_fh_imm_ass_dl() runs on RAW_PCU_Test_CT { /* SGSN sends some DL data, PCU will page on CCCH (PCH) */ BSSGP[0].send(ts_BSSGP_DL_UD(ms.tlli, f_rnd_octstring(12))); - f_ms_exp_dl_tbf_ass_ccch(ms); + + /* The PCU will send an IMMEDIATE ASSIGNMENT message on the AGCH. It + * should be noted that IMMEDIATE ASSIGNMENT messages for DL TBFs are + * commonly sent on the PCH. However in this case the IMSI is not + * known to the PCU and hence no paging group can be calculated. The + * PCU is then forced to use the AGCH. + * + * As a background information to this it should be noted that this + * works because the IMSI is commonly unknown during a GMM ATTACH + * REQUEST. In this phase the MS is in non-DRX mode, which means that + * it listens on all CCCH blocks (PCH and AGCH) + * + * See also: 3gpp TS 44.060, section 5.5.1.5 and + * 3gpp TS 45.002, section 6.5.3, 6.5.6 + */ + f_ms_exp_dl_tbf_ass_ccch(ms, PCU_IF_SAPI_AGCH_2); f_TC_pcuif_fh_check_imm_ass(valueof(info_ind), ms.dl_tbf.rr_imm_ass); f_shutdown(__BFILE__, __LINE__, final := true); |