forked from cellular-infrastructure/osmo-pcu
edge: Work-around to not use MCS-6 with padding
Currently single BSN blocks of size 68 (a single unit from MCS-8) are put into a MCS-6 block with padding according to TS 44.060 Annex J. Unfortunately, these packets are ignored by the E71. This might be related to the currently incorrect usage of the puncturing schemes and the RSB bit (the puncturing schemes are not updated and the RBS flag is never set). Avoid downgrading from MCS-8 to MCS-6 if there is no second block available. Send the block twice instead. Sponsored-by: On-Waves ehf
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@ -609,8 +609,12 @@ struct msgb *gprs_rlcmac_dl_tbf::create_dl_acked_block(
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num_bsns += 1;
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}
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if (num_bsns == 1)
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if (num_bsns == 1) {
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/* TODO: remove the conditional when MCS-6 padding isn't
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* failing to be decoded by MEs anymore */
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if (cs != GprsCodingScheme(GprsCodingScheme::MCS8))
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cs.decToSingleBlock(&need_padding);
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}
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gprs_rlc_data_info_init_dl(&rlc, cs, need_padding);
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@ -4886,10 +4886,11 @@ Complete DL frame for TBF(TFI=0 TLLI=0xffeeddcc DIR=DL STATE=FLOW EGPRS)len=56
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data block (BSN 0, MCS-8): 14 71 01 01 01 01 01 01 01 01 01 01 43 c0 01 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b
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- Restarting at BSN 0, because all blocks have been transmitted (FLOW).
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- Copying data unit 0 (BSN 0)
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- Copying data unit 1 (BSN 0)
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- Scheduling Ack/Nack polling, because is was requested explicitly (e.g. first final block sent).
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Polling is already scheduled for TBF(TFI=0 TLLI=0xffeeddcc DIR=DL STATE=FLOW EGPRS)
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msg block (BSN 0, MCS-6, padded): 07 00 00 04 00 00 00 00 00 00 45 5c 40 40 40 40 40 40 40 40 40 c0 10 70 c0 ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca 0a
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Sending data request: trx=0 ts=4 sapi=5 arfcn=0 fn=4 block=1 data=07 00 00 04 00 00 00 00 00 00 45 5c 40 40 40 40 40 40 40 40 40 c0 10 70 c0 ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca 0a
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msg block (BSN 0, MCS-8): 07 00 00 00 60 50 c4 05 04 04 04 04 04 04 04 04 04 0c 01 07 ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac 40 11 17 10 10 10 10 10 10 10 10 10 30 04 1c b0 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 02
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Sending data request: trx=0 ts=4 sapi=5 arfcn=0 fn=4 block=1 data=07 00 00 00 60 50 c4 05 04 04 04 04 04 04 04 04 04 0c 01 07 ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac 40 11 17 10 10 10 10 10 10 10 10 10 30 04 1c b0 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 02
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TBF(TFI=0 TLLI=0xffeeddcc DIR=DL STATE=FLOW EGPRS) append
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Received RTS for PDCH: TRX=0 TS=4 FN=8 block_nr=2 scheduling free USF for polling at FN=13 of TBF(TFI=0 TLLI=0xffeeddcc DIR=DL STATE=FLOW EGPRS)
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Scheduling data message at RTS for DL TFI=0 (TRX=0, TS=4) prio=3
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@ -4959,10 +4960,11 @@ Complete DL frame for TBF(TFI=0 TLLI=0xffeeddcc DIR=DL STATE=FLOW EGPRS)len=30
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data block (BSN 8, MCS-8): 48 3d 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 43 c0 01 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b
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- Restarting at BSN 0, because all blocks have been transmitted (FLOW).
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- Copying data unit 0 (BSN 8)
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- Copying data unit 1 (BSN 8)
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- Scheduling Ack/Nack polling, because is was requested explicitly (e.g. first final block sent).
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Polling is already scheduled for TBF(TFI=0 TLLI=0xffeeddcc DIR=DL STATE=FLOW EGPRS)
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msg block (BSN 8, MCS-6, padded): 07 00 02 04 00 00 00 00 00 00 52 4f 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 c0 10 70 c0 ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca 0a
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Sending data request: trx=0 ts=4 sapi=5 arfcn=0 fn=26 block=6 data=07 00 02 04 00 00 00 00 00 00 52 4f 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 c0 10 70 c0 ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca ca 0a
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msg block (BSN 8, MCS-8): 07 00 02 00 60 20 f5 04 04 04 04 04 04 04 04 04 04 04 04 04 04 04 04 04 04 04 04 04 04 04 04 04 04 04 04 04 04 04 04 04 04 04 04 0c 01 07 ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac 80 d4 13 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 30 04 1c b0 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 02
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Sending data request: trx=0 ts=4 sapi=5 arfcn=0 fn=26 block=6 data=07 00 02 00 60 20 f5 04 04 04 04 04 04 04 04 04 04 04 04 04 04 04 04 04 04 04 04 04 04 04 04 04 04 04 04 04 04 04 04 04 04 04 04 0c 01 07 ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac 80 d4 13 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 30 04 1c b0 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 b2 02
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TBF(TFI=0 TLLI=0xffeeddcc DIR=DL STATE=FLOW EGPRS) downlink acknowledge
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- Final ACK received.
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TBF(TFI=0 TLLI=0xffeeddcc DIR=DL STATE=FLOW EGPRS) changes state from FLOW to WAIT RELEASE
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