diff --git a/tests/tbf/TbfTest.cpp b/tests/tbf/TbfTest.cpp
index e25f344..2184b32 100644
--- a/tests/tbf/TbfTest.cpp
+++ b/tests/tbf/TbfTest.cpp
@@ -78,8 +78,7 @@
 						0, 0, 0);
 	dl_tbf->update_tlli(0x2342);
 	dl_tbf->update_ms(0x2342, GPRS_RLCMAC_DL_TBF);
-	dl_tbf->ta = 4;
-	the_bts.timing_advance()->remember(0x2342, dl_tbf->ta);
+	dl_tbf->set_ta(4);
 
 	gprs_rlcmac_tbf *ul_tbf = tbf_alloc_ul_tbf(the_bts.bts_data(),
 						dl_tbf, 0,
@@ -114,7 +113,17 @@
 	ms_new = the_bts.ms_by_tlli(0x2342);
 	OSMO_ASSERT(ms_new == NULL);
 
-	OSMO_ASSERT(the_bts.timing_advance()->recall(0x4232) == 4);
+	ms_new = the_bts.ms_by_tlli(0x4232);
+	OSMO_ASSERT(ms_new != NULL);
+	OSMO_ASSERT(ms_new->ta() == 4);
+
+	OSMO_ASSERT(ul_tbf->ta() == 4);
+	OSMO_ASSERT(dl_tbf->ta() == 4);
+
+	ul_tbf->set_ta(6);
+
+	OSMO_ASSERT(ul_tbf->ta() == 6);
+	OSMO_ASSERT(dl_tbf->ta() == 6);
 }
 
 static uint8_t llc_data[200];
@@ -439,9 +448,9 @@
 	OSMO_ASSERT(ul_tbf != NULL);
 
 	fprintf(stderr, "Got '%s', TA=%d\n",
-		ul_tbf->name(), ul_tbf->ta);
+		ul_tbf->name(), ul_tbf->ta());
 
-	OSMO_ASSERT(ul_tbf->ta == qta / 4);
+	OSMO_ASSERT(ul_tbf->ta() == qta / 4);
 
 	uint8_t data_msg[23] = {
 		0x00, /* GPRS_RLCMAC_DATA_BLOCK << 6 */
@@ -455,7 +464,8 @@
 
 	ms = the_bts.ms_by_tlli(0xf1223344);
 	OSMO_ASSERT(ms != NULL);
-	fprintf(stderr, "Got MS: TLLI = 0x%08x\n", ms->tlli());
+	fprintf(stderr, "Got MS: TLLI = 0x%08x, TA = %d\n", ms->tlli(), ms->ta());
+	OSMO_ASSERT(ms->ta() == qta/4);
 
 	printf("=== end %s ===\n", __func__);
 }
@@ -515,9 +525,9 @@
 	OSMO_ASSERT(ul_tbf != NULL);
 
 	fprintf(stderr, "Got '%s', TA=%d\n",
-		ul_tbf->name(), ul_tbf->ta);
+		ul_tbf->name(), ul_tbf->ta());
 
-	OSMO_ASSERT(ul_tbf->ta == qta / 4);
+	OSMO_ASSERT(ul_tbf->ta() == qta / 4);
 
 	/* send packet uplink assignment */
 	rts_fn += 52;
@@ -535,7 +545,8 @@
 
 	ms = the_bts.ms_by_tlli(0xf1223344);
 	OSMO_ASSERT(ms != NULL);
-	fprintf(stderr, "Got MS: TLLI = 0x%08x\n", ms->tlli());
+	fprintf(stderr, "Got MS: TLLI = 0x%08x, TA = %d\n", ms->tlli(), ms->ta());
+	OSMO_ASSERT(ms->ta() == qta/4);
 
 	printf("=== end %s ===\n", __func__);
 }
diff --git a/tests/tbf/TbfTest.err b/tests/tbf/TbfTest.err
index 20b1a72..d919b89 100644
--- a/tests/tbf/TbfTest.err
+++ b/tests/tbf/TbfTest.err
@@ -8,6 +8,7 @@
 Creating MS object, TLLI = 0x00000000
 The MS object cannot fully confirm an unexpected TLLI: 0x00002342, partly confirmed
 Attaching TBF to MS object, TLLI = 0x00002342, TBF = TBF(TFI=0 TLLI=0x00002342 DIR=DL STATE=NULL)
+Modifying MS object, TLLI = 0x00002342, TA 0 -> 4
 ********** TBF starts here **********
 Allocating UL TBF: TFI=0 TRX=0 MS_CLASS=0
 Slot Allocation (Algorithm A) for class 0
@@ -19,6 +20,7 @@
 Modifying MS object, TLLI: 0x00000000 -> 0x00002342, already confirmed partly
 The MS object cannot fully confirm an unexpected TLLI: 0x00004232, partly confirmed
 Modifying MS object, TLLI: 0x00002342 -> 0x00004232, already confirmed partly
+Modifying MS object, TLLI = 0x00004232, TA 4 -> 6
 Searching for first unallocated TFI: TRX=0 first TS=4
  Found TFI=0.
 ********** TBF starts here **********
@@ -425,7 +427,6 @@
 Detaching TBF from MS object, TLLI = 0xf1000001, TBF = TBF(TFI=0 TLLI=0xf1000001 DIR=DL STATE=FLOW)
 Destroying MS object, TLLI = 0xf1000001
 ********** TBF ends here **********
-TA unknown, assuming 0
 Searching for first unallocated TFI: TRX=0 first TS=4
  Found TFI=0.
 ********** TBF starts here **********
@@ -446,7 +447,6 @@
 TBF(TFI=0 TLLI=0xc0000000 DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TX: START TBF(TFI=0 TLLI=0xc0000000 DIR=DL STATE=ASSIGN) Immediate Assignment Downlink (PCH)
 Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 30 30 2d 06 3f 30 0c 00 00 7d 80 00 00 00 dc 00 00 00 08 00 23 2b 2b 2b 2b 
-TA unknown, assuming 0
 Searching for first unallocated TFI: TRX=0 first TS=4
  Found TFI=1.
 ********** TBF starts here **********
@@ -467,7 +467,6 @@
 TBF(TFI=1 TLLI=0xc0000001 DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TX: START TBF(TFI=1 TLLI=0xc0000001 DIR=DL STATE=ASSIGN) Immediate Assignment Downlink (PCH)
 Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 30 31 2d 06 3f 30 0c 00 00 7d 80 00 00 00 dc 00 00 00 18 40 23 2b 2b 2b 2b 
-TA unknown, assuming 0
 Searching for first unallocated TFI: TRX=0 first TS=4
  Found TFI=2.
 ********** TBF starts here **********
@@ -488,7 +487,6 @@
 TBF(TFI=2 TLLI=0xc0000002 DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TX: START TBF(TFI=2 TLLI=0xc0000002 DIR=DL STATE=ASSIGN) Immediate Assignment Downlink (PCH)
 Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 30 32 2d 06 3f 30 0c 00 00 7d 80 00 00 00 dc 00 00 00 28 80 23 2b 2b 2b 2b 
-TA unknown, assuming 0
 Searching for first unallocated TFI: TRX=0 first TS=4
  Found TFI=3.
 ********** TBF starts here **********
@@ -509,7 +507,6 @@
 TBF(TFI=3 TLLI=0xc0000003 DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TX: START TBF(TFI=3 TLLI=0xc0000003 DIR=DL STATE=ASSIGN) Immediate Assignment Downlink (PCH)
 Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 30 33 2d 06 3f 30 0c 00 00 7d 80 00 00 00 dc 00 00 00 38 c0 23 2b 2b 2b 2b 
-TA unknown, assuming 0
 Searching for first unallocated TFI: TRX=0 first TS=4
  Found TFI=4.
 ********** TBF starts here **********
@@ -530,7 +527,6 @@
 TBF(TFI=4 TLLI=0xc0000004 DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TX: START TBF(TFI=4 TLLI=0xc0000004 DIR=DL STATE=ASSIGN) Immediate Assignment Downlink (PCH)
 Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 30 34 2d 06 3f 30 0c 00 00 7d 80 00 00 00 dc 00 00 00 49 00 23 2b 2b 2b 2b 
-TA unknown, assuming 0
 Searching for first unallocated TFI: TRX=0 first TS=4
  Found TFI=5.
 ********** TBF starts here **********
@@ -551,7 +547,6 @@
 TBF(TFI=5 TLLI=0xc0000005 DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TX: START TBF(TFI=5 TLLI=0xc0000005 DIR=DL STATE=ASSIGN) Immediate Assignment Downlink (PCH)
 Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 30 35 2d 06 3f 30 0c 00 00 7d 80 00 00 00 dc 00 00 00 59 40 23 2b 2b 2b 2b 
-TA unknown, assuming 0
 Searching for first unallocated TFI: TRX=0 first TS=4
  Found TFI=6.
 ********** TBF starts here **********
@@ -572,7 +567,6 @@
 TBF(TFI=6 TLLI=0xc0000006 DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TX: START TBF(TFI=6 TLLI=0xc0000006 DIR=DL STATE=ASSIGN) Immediate Assignment Downlink (PCH)
 Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 30 36 2d 06 3f 30 0c 00 00 7d 80 00 00 00 dc 00 00 00 69 80 23 2b 2b 2b 2b 
-TA unknown, assuming 0
 Searching for first unallocated TFI: TRX=0 first TS=4
  Found TFI=7.
 ********** TBF starts here **********
@@ -593,7 +587,6 @@
 TBF(TFI=7 TLLI=0xc0000007 DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TX: START TBF(TFI=7 TLLI=0xc0000007 DIR=DL STATE=ASSIGN) Immediate Assignment Downlink (PCH)
 Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 30 37 2d 06 3f 30 0c 00 00 7d 80 00 00 00 dc 00 00 00 79 c0 23 2b 2b 2b 2b 
-TA unknown, assuming 0
 Searching for first unallocated TFI: TRX=0 first TS=4
  Found TFI=8.
 ********** TBF starts here **********
@@ -614,7 +607,6 @@
 TBF(TFI=8 TLLI=0xc0000008 DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TX: START TBF(TFI=8 TLLI=0xc0000008 DIR=DL STATE=ASSIGN) Immediate Assignment Downlink (PCH)
 Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 30 38 2d 06 3f 30 0c 00 00 7d 80 00 00 00 dc 00 00 00 8a 00 23 2b 2b 2b 2b 
-TA unknown, assuming 0
 Searching for first unallocated TFI: TRX=0 first TS=4
  Found TFI=9.
 ********** TBF starts here **********
@@ -635,7 +627,6 @@
 TBF(TFI=9 TLLI=0xc0000009 DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TX: START TBF(TFI=9 TLLI=0xc0000009 DIR=DL STATE=ASSIGN) Immediate Assignment Downlink (PCH)
 Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 30 39 2d 06 3f 30 0c 00 00 7d 80 00 00 00 dc 00 00 00 9a 40 23 2b 2b 2b 2b 
-TA unknown, assuming 0
 Searching for first unallocated TFI: TRX=0 first TS=4
  Found TFI=10.
 ********** TBF starts here **********
@@ -656,7 +647,6 @@
 TBF(TFI=10 TLLI=0xc000000a DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TX: START TBF(TFI=10 TLLI=0xc000000a DIR=DL STATE=ASSIGN) Immediate Assignment Downlink (PCH)
 Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 31 30 2d 06 3f 30 0c 00 00 7d 80 00 00 00 dc 00 00 00 aa 80 23 2b 2b 2b 2b 
-TA unknown, assuming 0
 Searching for first unallocated TFI: TRX=0 first TS=4
  Found TFI=11.
 ********** TBF starts here **********
@@ -677,7 +667,6 @@
 TBF(TFI=11 TLLI=0xc000000b DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TX: START TBF(TFI=11 TLLI=0xc000000b DIR=DL STATE=ASSIGN) Immediate Assignment Downlink (PCH)
 Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 31 31 2d 06 3f 30 0c 00 00 7d 80 00 00 00 dc 00 00 00 ba c0 23 2b 2b 2b 2b 
-TA unknown, assuming 0
 Searching for first unallocated TFI: TRX=0 first TS=4
  Found TFI=12.
 ********** TBF starts here **********
@@ -698,7 +687,6 @@
 TBF(TFI=12 TLLI=0xc000000c DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TX: START TBF(TFI=12 TLLI=0xc000000c DIR=DL STATE=ASSIGN) Immediate Assignment Downlink (PCH)
 Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 31 32 2d 06 3f 30 0c 00 00 7d 80 00 00 00 dc 00 00 00 cb 00 23 2b 2b 2b 2b 
-TA unknown, assuming 0
 Searching for first unallocated TFI: TRX=0 first TS=4
  Found TFI=13.
 ********** TBF starts here **********
@@ -719,7 +707,6 @@
 TBF(TFI=13 TLLI=0xc000000d DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TX: START TBF(TFI=13 TLLI=0xc000000d DIR=DL STATE=ASSIGN) Immediate Assignment Downlink (PCH)
 Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 31 33 2d 06 3f 30 0c 00 00 7d 80 00 00 00 dc 00 00 00 db 40 23 2b 2b 2b 2b 
-TA unknown, assuming 0
 Searching for first unallocated TFI: TRX=0 first TS=4
  Found TFI=14.
 ********** TBF starts here **********
@@ -740,7 +727,6 @@
 TBF(TFI=14 TLLI=0xc000000e DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TX: START TBF(TFI=14 TLLI=0xc000000e DIR=DL STATE=ASSIGN) Immediate Assignment Downlink (PCH)
 Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 31 34 2d 06 3f 30 0c 00 00 7d 80 00 00 00 dc 00 00 00 eb 80 23 2b 2b 2b 2b 
-TA unknown, assuming 0
 Searching for first unallocated TFI: TRX=0 first TS=4
  Found TFI=15.
 ********** TBF starts here **********
@@ -761,7 +747,6 @@
 TBF(TFI=15 TLLI=0xc000000f DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TX: START TBF(TFI=15 TLLI=0xc000000f DIR=DL STATE=ASSIGN) Immediate Assignment Downlink (PCH)
 Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 31 35 2d 06 3f 30 0c 00 00 7d 80 00 00 00 dc 00 00 00 fb c0 23 2b 2b 2b 2b 
-TA unknown, assuming 0
 Searching for first unallocated TFI: TRX=0 first TS=4
  Found TFI=16.
 ********** TBF starts here **********
@@ -782,7 +767,6 @@
 TBF(TFI=16 TLLI=0xc0000010 DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TX: START TBF(TFI=16 TLLI=0xc0000010 DIR=DL STATE=ASSIGN) Immediate Assignment Downlink (PCH)
 Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 31 36 2d 06 3f 30 0c 00 00 7d 80 00 00 00 dc 00 00 01 0c 00 23 2b 2b 2b 2b 
-TA unknown, assuming 0
 Searching for first unallocated TFI: TRX=0 first TS=4
  Found TFI=17.
 ********** TBF starts here **********
@@ -803,7 +787,6 @@
 TBF(TFI=17 TLLI=0xc0000011 DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TX: START TBF(TFI=17 TLLI=0xc0000011 DIR=DL STATE=ASSIGN) Immediate Assignment Downlink (PCH)
 Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 31 37 2d 06 3f 30 0c 00 00 7d 80 00 00 00 dc 00 00 01 1c 40 23 2b 2b 2b 2b 
-TA unknown, assuming 0
 Searching for first unallocated TFI: TRX=0 first TS=4
  Found TFI=18.
 ********** TBF starts here **********
@@ -824,7 +807,6 @@
 TBF(TFI=18 TLLI=0xc0000012 DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TX: START TBF(TFI=18 TLLI=0xc0000012 DIR=DL STATE=ASSIGN) Immediate Assignment Downlink (PCH)
 Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 31 38 2d 06 3f 30 0c 00 00 7d 80 00 00 00 dc 00 00 01 2c 80 23 2b 2b 2b 2b 
-TA unknown, assuming 0
 Searching for first unallocated TFI: TRX=0 first TS=4
  Found TFI=19.
 ********** TBF starts here **********
@@ -845,7 +827,6 @@
 TBF(TFI=19 TLLI=0xc0000013 DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TX: START TBF(TFI=19 TLLI=0xc0000013 DIR=DL STATE=ASSIGN) Immediate Assignment Downlink (PCH)
 Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 31 39 2d 06 3f 30 0c 00 00 7d 80 00 00 00 dc 00 00 01 3c c0 23 2b 2b 2b 2b 
-TA unknown, assuming 0
 Searching for first unallocated TFI: TRX=0 first TS=4
  Found TFI=20.
 ********** TBF starts here **********
@@ -866,7 +847,6 @@
 TBF(TFI=20 TLLI=0xc0000014 DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TX: START TBF(TFI=20 TLLI=0xc0000014 DIR=DL STATE=ASSIGN) Immediate Assignment Downlink (PCH)
 Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 32 30 2d 06 3f 30 0c 00 00 7d 80 00 00 00 dc 00 00 01 4d 00 23 2b 2b 2b 2b 
-TA unknown, assuming 0
 Searching for first unallocated TFI: TRX=0 first TS=4
  Found TFI=21.
 ********** TBF starts here **********
@@ -887,7 +867,6 @@
 TBF(TFI=21 TLLI=0xc0000015 DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TX: START TBF(TFI=21 TLLI=0xc0000015 DIR=DL STATE=ASSIGN) Immediate Assignment Downlink (PCH)
 Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 32 31 2d 06 3f 30 0c 00 00 7d 80 00 00 00 dc 00 00 01 5d 40 23 2b 2b 2b 2b 
-TA unknown, assuming 0
 Searching for first unallocated TFI: TRX=0 first TS=4
  Found TFI=22.
 ********** TBF starts here **********
@@ -908,7 +887,6 @@
 TBF(TFI=22 TLLI=0xc0000016 DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TX: START TBF(TFI=22 TLLI=0xc0000016 DIR=DL STATE=ASSIGN) Immediate Assignment Downlink (PCH)
 Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 32 32 2d 06 3f 30 0c 00 00 7d 80 00 00 00 dc 00 00 01 6d 80 23 2b 2b 2b 2b 
-TA unknown, assuming 0
 Searching for first unallocated TFI: TRX=0 first TS=4
  Found TFI=23.
 ********** TBF starts here **********
@@ -929,7 +907,6 @@
 TBF(TFI=23 TLLI=0xc0000017 DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TX: START TBF(TFI=23 TLLI=0xc0000017 DIR=DL STATE=ASSIGN) Immediate Assignment Downlink (PCH)
 Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 32 33 2d 06 3f 30 0c 00 00 7d 80 00 00 00 dc 00 00 01 7d c0 23 2b 2b 2b 2b 
-TA unknown, assuming 0
 Searching for first unallocated TFI: TRX=0 first TS=4
  Found TFI=24.
 ********** TBF starts here **********
@@ -950,7 +927,6 @@
 TBF(TFI=24 TLLI=0xc0000018 DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TX: START TBF(TFI=24 TLLI=0xc0000018 DIR=DL STATE=ASSIGN) Immediate Assignment Downlink (PCH)
 Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 32 34 2d 06 3f 30 0c 00 00 7d 80 00 00 00 dc 00 00 01 8e 00 23 2b 2b 2b 2b 
-TA unknown, assuming 0
 Searching for first unallocated TFI: TRX=0 first TS=4
  Found TFI=25.
 ********** TBF starts here **********
@@ -971,7 +947,6 @@
 TBF(TFI=25 TLLI=0xc0000019 DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TX: START TBF(TFI=25 TLLI=0xc0000019 DIR=DL STATE=ASSIGN) Immediate Assignment Downlink (PCH)
 Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 32 35 2d 06 3f 30 0c 00 00 7d 80 00 00 00 dc 00 00 01 9e 40 23 2b 2b 2b 2b 
-TA unknown, assuming 0
 Searching for first unallocated TFI: TRX=0 first TS=4
  Found TFI=26.
 ********** TBF starts here **********
@@ -992,7 +967,6 @@
 TBF(TFI=26 TLLI=0xc000001a DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TX: START TBF(TFI=26 TLLI=0xc000001a DIR=DL STATE=ASSIGN) Immediate Assignment Downlink (PCH)
 Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 32 36 2d 06 3f 30 0c 00 00 7d 80 00 00 00 dc 00 00 01 ae 80 23 2b 2b 2b 2b 
-TA unknown, assuming 0
 Searching for first unallocated TFI: TRX=0 first TS=4
  Found TFI=27.
 ********** TBF starts here **********
@@ -1013,7 +987,6 @@
 TBF(TFI=27 TLLI=0xc000001b DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TX: START TBF(TFI=27 TLLI=0xc000001b DIR=DL STATE=ASSIGN) Immediate Assignment Downlink (PCH)
 Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 32 37 2d 06 3f 30 0c 00 00 7d 80 00 00 00 dc 00 00 01 be c0 23 2b 2b 2b 2b 
-TA unknown, assuming 0
 Searching for first unallocated TFI: TRX=0 first TS=4
  Found TFI=28.
 ********** TBF starts here **********
@@ -1034,7 +1007,6 @@
 TBF(TFI=28 TLLI=0xc000001c DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TX: START TBF(TFI=28 TLLI=0xc000001c DIR=DL STATE=ASSIGN) Immediate Assignment Downlink (PCH)
 Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 32 38 2d 06 3f 30 0c 00 00 7d 80 00 00 00 dc 00 00 01 cf 00 23 2b 2b 2b 2b 
-TA unknown, assuming 0
 Searching for first unallocated TFI: TRX=0 first TS=4
  Found TFI=29.
 ********** TBF starts here **********
@@ -1055,7 +1027,6 @@
 TBF(TFI=29 TLLI=0xc000001d DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TX: START TBF(TFI=29 TLLI=0xc000001d DIR=DL STATE=ASSIGN) Immediate Assignment Downlink (PCH)
 Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 32 39 2d 06 3f 30 0c 00 00 7d 80 00 00 00 dc 00 00 01 df 40 23 2b 2b 2b 2b 
-TA unknown, assuming 0
 Searching for first unallocated TFI: TRX=0 first TS=4
  Found TFI=30.
 ********** TBF starts here **********
@@ -1076,7 +1047,6 @@
 TBF(TFI=30 TLLI=0xc000001e DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TX: START TBF(TFI=30 TLLI=0xc000001e DIR=DL STATE=ASSIGN) Immediate Assignment Downlink (PCH)
 Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 33 30 2d 06 3f 30 0c 00 00 7d 80 00 00 00 dc 00 00 01 ef 80 23 2b 2b 2b 2b 
-TA unknown, assuming 0
 Searching for first unallocated TFI: TRX=0 first TS=4
  Found TFI=31.
 ********** TBF starts here **********
@@ -1097,7 +1067,6 @@
 TBF(TFI=31 TLLI=0xc000001f DIR=DL STATE=NULL) changes state from NULL to ASSIGN
 TX: START TBF(TFI=31 TLLI=0xc000001f DIR=DL STATE=ASSIGN) Immediate Assignment Downlink (PCH)
 Sending data request: trx=0 ts=0 sapi=3 arfcn=0 fn=0 block=0 data=30 33 31 2d 06 3f 30 0c 00 00 7d 80 00 00 00 dc 00 00 01 ff c0 23 2b 2b 2b 2b 
-TA unknown, assuming 0
 Searching for first unallocated TFI: TRX=0 first TS=4
 No TFI available.
 No PDCH resource
@@ -1129,6 +1098,7 @@
 UL DATA TFI=0 received (V(Q)=0 .. V(R)=0)
 Creating MS object, TLLI = 0x00000000
 Modifying MS object, UL TLLI: 0x00000000 -> 0xf1223344, not yet confirmed
+Modifying MS object, TLLI = 0xf1223344, TA 0 -> 7
 Attaching TBF to MS object, TLLI = 0xf1223344, TBF = TBF(TFI=0 TLLI=0xf1223344 DIR=UL STATE=FLOW)
 Decoded premier TLLI=0xf1223344 of UL DATA TFI=0.
 TBF(TFI=0 TLLI=0xf1223344 DIR=UL STATE=FLOW) restarting timer 3169 while old timer 3169 pending 
@@ -1147,7 +1117,7 @@
 TBF(TFI=0 TLLI=0xf1223344 DIR=UL STATE=FLOW) changes state from FLOW to FINISHED
 - Scheduling Ack/Nack, because TLLI is included.
 - Scheduling Ack/Nack, because last block has CV==0.
-Got MS: TLLI = 0xf1223344
+Got MS: TLLI = 0xf1223344, TA = 7
 Sending data request: trx=0 ts=7 sapi=5 arfcn=0 fn=2654218 block=8 data=47 94 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 
 MS requests UL TBF on RACH, so we provide one:
 MS requests single block allocation
@@ -1179,6 +1149,7 @@
 Creating MS object, TLLI = 0x00000000
 Modifying MS object, UL TLLI: 0x00000000 -> 0xf1223344, not yet confirmed
 Attaching TBF to MS object, TLLI = 0xf1223344, TBF = TBF(TFI=0 TLLI=0xf1223344 DIR=UL STATE=ASSIGN)
+Modifying MS object, TLLI = 0xf1223344, TA 0 -> 7
 Change control TS to 7 until assinment is complete.
 Got 'TBF(TFI=0 TLLI=0xf1223344 DIR=UL STATE=ASSIGN)', TA=7
 TBF(TFI=0 TLLI=0xf1223344 DIR=UL STATE=ASSIGN)s start Packet Uplink Assignment (PACCH)
@@ -1197,4 +1168,4 @@
 TBF(TFI=0 TLLI=0xf1223344 DIR=UL STATE=ASSIGN) complete UL frame that fits precisely in last block: len=20
 LLC [PCU -> SGSN] TBF(TFI=0 TLLI=0xf1223344 DIR=UL STATE=ASSIGN) len=20
 No bctx
-Got MS: TLLI = 0xf1223344
+Got MS: TLLI = 0xf1223344, TA = 7