pdch.cpp: Avoid dropping existing DL TBF during rcv_resource_request

There's no real good explanation on why the DL TBF is dropped there,
since PKT RESOUCE REQUEST is used basically during UL TBF establishment.
Also, as decribed by TS 44.060 11.2.16 "Packet Resource Request":
"""
This message is sent on the PACCH by the mobile station to the network
to request a change in the uplink resources assigned.
"""

Change-Id: Iab4afb66f0d671f7ad54909d2685a1613e12ab4d

1 files changed, 0 insertions, 28 deletions

diff --git a/tests/tbf/TbfTest.err b/tests/tbf/TbfTest.err
index 0d097ee2..6eb86cf3 100644
--- a/tests/tbf/TbfTest.err
+++ b/tests/tbf/TbfTest.err
@@ -1885,13 +1885,6 @@ Searching for first unallocated TFI: TRX=0
  Found TFI=0.
 +++++++++++++++++++++++++ RX : Uplink Control Block +++++++++++++++++++++++++
 ------------------------- RX : Uplink Control Block -------------------------
-TBF(TFI=0 TLLI=0xf1223344 DIR=DL STATE=ASSIGN) Got RACH from TLLI=0xf1223344 while TBF still exists. Release pending DL TBF
-TBF(TFI=0 TLLI=0xf1223344 DIR=DL STATE=ASSIGN) changes state from ASSIGN to RELEASING
-TBF(TFI=0 TLLI=0xf1223344 DIR=DL STATE=RELEASING) free
-TBF(TFI=0 TLLI=0xf1223344 DIR=DL STATE=RELEASING) stopping timer T0 [freeing TBF]
-PDCH(TS 7, TRX 0): Detaching TBF(TFI=0 TLLI=0xf1223344 DIR=DL STATE=RELEASING), 0 TBFs, USFs = 00, TFIs = 00000000.
-Detaching TBF from MS object, TLLI = 0xf1223344, TBF = TBF(TFI=0 TLLI=0xf1223344 DIR=DL STATE=RELEASING)
-********** DL-TBF ends here **********
 MS requests UL TBF in packet resource request of single block, so we provide one:
 ********** UL-TBF starts here **********
 Allocating UL TBF: MS_CLASS=1/0
@@ -1925,27 +1918,6 @@ TBF(TFI=0 TLLI=0xf1223344 DIR=UL STATE=ASSIGN) changes poll state from GPRS_RLCM
 TBF(TFI=0 TLLI=0xf1223344 DIR=UL STATE=ASSIGN) [DOWNLINK] UPLINK ASSIGNED
 TBF(TFI=0 TLLI=0xf1223344 DIR=UL STATE=ASSIGN) changes UL ASS state from GPRS_RLCMAC_UL_ASS_WAIT_ACK to GPRS_RLCMAC_UL_ASS_NONE
 TBF(TFI=0 TLLI=0xf1223344 DIR=UL STATE=ASSIGN) changes state from ASSIGN to FLOW
-********** DL-TBF starts here **********
-Allocating DL TBF: MS_CLASS=1/0
-[DL] Slot Allocation (Algorithm A) for class 1
-- Skipping TS 0, because not enabled
-- Skipping TS 1, because not enabled
-- Skipping TS 2, because not enabled
-- Skipping TS 3, because not enabled
-- Skipping TS 4, because not enabled
-- Skipping TS 5, because not enabled
-- Skipping TS 6, because not enabled
-[DL] Assign downlink TS=7 TFI=0
-PDCH(TS 7, TRX 0): Attaching TBF(TFI=0 TLLI=0x00000000 DIR=DL STATE=NULL), 1 TBFs, USFs = 01, TFIs = 00000001.
-TBF(TFI=0 TLLI=0x00000000 DIR=DL STATE=NULL) Setting Control TS 7
-Attaching TBF to MS object, TLLI = 0xf1223344, TBF = TBF(TFI=0 TLLI=0xf1223344 DIR=DL STATE=NULL)
-TBF(TFI=0 TLLI=0xf1223344 DIR=DL STATE=NULL) Allocated: trx = 0, ul_slots = 80, dl_slots = 80
-TBF(TFI=0 TLLI=0xf1223344 DIR=UL STATE=FLOW) Trigger downlink assignment on PACCH
-TBF(TFI=0 TLLI=0xf1223344 DIR=DL STATE=NULL) Send dowlink assignment on PACCH, because TBF(TFI=0 TLLI=0xf1223344 DIR=UL STATE=FLOW) exists
-TBF(TFI=0 TLLI=0xf1223344 DIR=UL STATE=FLOW) changes DL ASS state from GPRS_RLCMAC_DL_ASS_NONE to GPRS_RLCMAC_DL_ASS_SEND_ASS
-TBF(TFI=0 TLLI=0xf1223344 DIR=DL STATE=NULL) changes state from NULL to ASSIGN
-TBF(TFI=0 TLLI=0xf1223344 DIR=DL STATE=ASSIGN) set ass. type PACCH [prev CCCH:0, PACCH:0]
-TBF(TFI=0 TLLI=0xf1223344 DIR=DL STATE=ASSIGN) starting timer T0 [assignment (PACCH)] with 2 sec. 0 microsec, cur_fn=0
 Got CS-1 RLC block: R=0, SI=0, TFI=0, CPS=0, RSB=0, rc=184
 TBF(TFI=0 TLLI=0xf1223344 DIR=UL STATE=FLOW) UL DATA TFI=0 received (V(Q)=0 .. V(R)=0)
 TBF(TFI=0 TLLI=0xf1223344 DIR=UL STATE=FLOW) restarting timer T3169 [acked (data)] with 5 sec. 0 microsec, cur_fn=0