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- 14 Jun, 2018 1 commit
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Cedric Roux authored
Since now pucch_n1_AN is taken from the configuration file, it has to be set to 0. Value 32 will not work well, at least in FDD. This has to be handled properly at some point (do not use uplink resource blocks used by PUCCH for PUSCH).
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- 09 Feb, 2018 1 commit
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Cedric Roux authored
'_' is not a valid character. S1AP specs say: ENBname ::= PrintableString (SIZE (1..150,...)) And X.680 (08/2015) 41.4 table 10 lists the valid characters for PrintableString. '_' is not there. We replace by '-' which is there. Connection of eNB to ppenair-cn has not been tested. There is no reason why it would fail.
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- 24 Aug, 2017 1 commit
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Cedric Roux authored
This commits contains several fixes to improve a multi-UE scenario. This is not the end of the story. Summary of work: ================ 1 - improve SR (scheduling requests): We configured n1pucch == 3 for scheduling requests, for all UEs. We now use 71 - UE_id/10. For it to work, it is vital that pucch_nRB_CQI in the configuration file is set to 0, otherwise the SR will go to an RB used for PUSCH and uplink decoding will fail whenever an UE does SR. Note that we will have problems with 20MHz when we use a CCE that let the UE send the ACK/NACK using a n1pucch allocated for SR, because when the PDCCH is of size 3, we can have 87 CCEs and it may lead to an n1pucch colliding with one for SR. The work done in this patch is a quick solution, seems to work with 10MHz. The real solution is to disable the use of those CCEs that would lead an UE to use a n1pucch colliding with an SR n1pucch. Then we can use whatever n1pucch we want for SR, as long as the scheduler protects them. Impacted files: configuration files openair2/RRC/LITE/MESSAGES/asn1_msg.c 2 - some fixes for uplink scheduling: - Do not use PRACH for PUSCH, that leads to too many false PRACH detection. Plus the PUSCH receiving may fail if one UE uses the PRACH at the same time. - Take care of retransmissions. That was not done at all, so we could allocate one RB to several UEs. The current design of the code makes it hard to do it properly, so we chose a quick and dirty solution, which is to increase "first_rb" to skip any RB used for retransmission. In this process we may skip a lot of free RBs. A proper solution is needed here. - Do not allocate the last RB. This one is used for PUCCH. It was sometimes allocated to PUSCH. - In the pre-processor we didn't pre-allocate RBs to UEs with an empty buffer status. We didn't check if the UE sent an SR. For example in a three UEs scenario, we could have the third UE never scheduled in the uplink. - rb_table_index was not decreased properly, so we allocated too much RBs to some UEs and thus not enough to others. Impacted files: openair2/LAYER2/MAC/eNB_scheduler_ulsch.c openair2/LAYER2/MAC/pre_processor.c openair1/SCHED/phy_procedures_lte_eNb.c 3 - some fixes for downlink scheduling: - The check on CCE allocation was not correct. We did something like: if (cce allocation is possible) { prepare } We should have done: save current cce allocation if (cce allocation is possible) { allocate cce prepare } reset current cce allocation Basically, when we scheduled several UEs, they were checked separately, and the totality of them was not checked. Impacted file: openair2/LAYER2/MAC/eNB_scheduler_dlsch.c - The retransmissions are probably not handled correctly. Check in openair2/LAYER2/MAC/pre_processor.c, near the comment "// control channel or retransmission", the case "round > 0" was added. It's probably not enough, even maybe not correct. - Change SF05_LIMIT with SF0_LIMIT. We accept to use central blocks in SF 5. The code was also not correct, vrb_map was not set properly because the loop on j was wrong for the last RBG (which can have one less RB than the others). This is not satisfying. The real solution is to use the central RBs and check that the MCS used is compatible with the numbers of resource elements allocated (we don't want to put too more data bits than what fits). 4 - some fixes in PUCCH decoding: See: openair1/PHY/LTE_TRANSPORT/pucch.c Probably not enough. Some more work and analysis is required for a proper use of the PUCCH. What we see is that the PUCCH constellation gets wrong when there are several UEs, meaning the received ACK/NACK is not properly decoded (this, or something else...). 5 - several fixes/checks added here and there: - The final allocate_CCEs in eNB_dlsch_ulsch_scheduler is checked and we brutally exit if it fails. - We exit in get_num_pdcch_symbols in case of failure (this should never happen anyway, no big deal normally). - Some logs added or changed to error/warning instead of debug. - In dlsch_scheduler_pre_processor an abort() was added. The code here looks suspicious. - In assign_max_mcs_min_rb, rb_table_index was not set to 2, the value 0 was used. This was not correct. What remains to be done: ======================== - Correct CCE allocation (take into account SR n1pucch, check that all the n1pucch that will be used are "compatible"). - Take into account the PHICH when scheduling uplink. As of today it is very possible to have two UEs use the same PHICH group and PHICH sequence index. We can use n_DMRS in the DCI to have uniqueness (see 36.213 table 9.1.2-2). We can drop an allocation if there is no free PHICH group/sequence index for a given UE. - When there is an uplink retransmission in the PRACH, we have to disable PRACH detection. It is possible that one UE does PRACH at the same time, but then what to do? We could use DCI0-based retransmission in this specific case maybe... - Handle free RBs in uplink in a much better way in case of a retransmission. We may have a lot of free unused RBs with the current code. - Check downlink retransmissions. Not much has been done there. - Surely more stuff not clear yet. In some situations we don't have a good behavior of the system. Hard to describe more precisely at this point.
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- 17 Mar, 2017 1 commit
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Cedric Roux authored
- README.txt modified - tests added in test_case_list.xml (only for test setup v2) - python code modified - configuration files added
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- 17 Feb, 2017 1 commit
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pyroclaste authored
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- 08 Feb, 2017 1 commit
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Navid Nikaein authored
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- 07 Jan, 2017 1 commit
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Raymond.Knopp authored
fixes for precoding (turning off if nb_antennas_tx=1), configuration files, timing advance with 3/4 sampling on 20 MHz, logging in MAC
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- 22 Dec, 2016 1 commit
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Raymond.Knopp authored
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- 01 Dec, 2016 1 commit
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Raymond.Knopp authored
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- 06 Aug, 2016 1 commit
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Raymond Knopp authored
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- 01 Aug, 2016 1 commit
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Raymond Knopp authored
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- 31 Jul, 2016 2 commits
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Raymond Knopp authored
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Raymond Knopp authored
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- 27 Jul, 2016 1 commit
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Sandeep Kumar authored
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- 07 Jun, 2016 1 commit
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Rohit Gupta authored
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- 09 May, 2016 2 commits
- 29 Feb, 2016 1 commit
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Navid Nikaein authored
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- 19 Feb, 2016 1 commit
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Raymond Knopp authored
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- 18 Feb, 2016 1 commit
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Navid Nikaein authored
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- 17 Feb, 2016 3 commits
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Rohit Gupta authored
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trilyrak authored
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trilyrak authored
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- 08 Feb, 2016 1 commit
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Aikaterini authored
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- 07 Feb, 2016 1 commit
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Aikaterini authored
make changes to use the fronthaul configuration parameters - updates to rrh_gw.c and eNB_transport.c wrt to changes in openair0_device struct
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- 05 Feb, 2016 2 commits
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Aikaterini authored
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Aikaterini authored
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- 11 Jan, 2016 1 commit
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Raymond Knopp authored
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- 16 Dec, 2015 1 commit
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gauthier authored
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- 24 Nov, 2015 1 commit
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ABEILLE authored
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- 19 Oct, 2015 1 commit
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ABEILLE authored
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- 04 Sep, 2015 1 commit
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knopp authored
git-svn-id: http://svn.eurecom.fr/openair4G/trunk@7800 818b1a75-f10b-46b9-bf7c-635c3b92a50f
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- 29 Jun, 2015 1 commit
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gauthier authored
git-svn-id: http://svn.eurecom.fr/openair4G/trunk@7670 818b1a75-f10b-46b9-bf7c-635c3b92a50f
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- 10 Jun, 2015 1 commit
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Raymond Knopp authored
git-svn-id: http://svn.eurecom.fr/openair4G/trunk@7553 818b1a75-f10b-46b9-bf7c-635c3b92a50f
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- 13 May, 2015 1 commit
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Lionel Gauthier authored
No need for GTPURH kernel module (work done in GTPUAH, will change module name later). still classification with iptables mark, conntrack. Tested with EPC local to eNB, test with remote EPC after this commit. Added srb1 parameters in enb config file, Correction of mscgen traces git-svn-id: http://svn.eurecom.fr/openair4G/trunk@7413 818b1a75-f10b-46b9-bf7c-635c3b92a50f
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- 16 Jan, 2015 3 commits
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Florian Kaltenberger authored
git-svn-id: http://svn.eurecom.fr/openair4G/trunk@6409 818b1a75-f10b-46b9-bf7c-635c3b92a50f
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Raymond Knopp authored
git-svn-id: http://svn.eurecom.fr/openair4G/trunk@6404 818b1a75-f10b-46b9-bf7c-635c3b92a50f
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Raymond Knopp authored
git-svn-id: http://svn.eurecom.fr/openair4G/trunk@6402 818b1a75-f10b-46b9-bf7c-635c3b92a50f
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- 08 Dec, 2014 1 commit
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Raymond Knopp authored
git-svn-id: http://svn.eurecom.fr/openair4G/trunk@6190 818b1a75-f10b-46b9-bf7c-635c3b92a50f
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- 17 Nov, 2014 1 commit
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Florian Kaltenberger authored
git-svn-id: http://svn.eurecom.fr/openair4G/trunk@6025 818b1a75-f10b-46b9-bf7c-635c3b92a50f
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