As reported by Emad Alizade:
According to "Issue255 256 257 paging reesta release" that has been
merged in develop version, we have a question: In rrc_eNB_free_UE()
function only all ulsch related memory of user has been cleaned, but
I think not only ulsch memory but also dlsch memory must be cleaned.
I tested the latest develop version and with repetition UE attach-detach
procedures we find that the dlsch memory has not been cleaned and after
repeat this sequence (45 times) assertion with cause UE_id!=-1 (no free
or exiting dlsch_context, dci_tools.c: fill_dci_and_dlsch() ) occurred
and no UE will be attached to system.
The fixes in this commit are from Emad Alizade.
Summary of changes:
- Implementation of paging (see issue #255 in gitlab)
- Implementation of RRC RE-ESTABLISHMENT (see issue #256 in gitlab)
- Implementation of RRC CONNECTION RELEASE (see issue #257 in gitlab)
Some modifications with timers have been done.
Expect (and report) problems, thanks.
What has been tested:
- monolithic eNB 5 and 10MHz with one commercial UE. UDP and TCP
traffic, uplink and downlink, with iperf (with a third party
EPC, not openair-cn). TCP downlink traffic is not stable.
Reason yet unknown. Will be fixed later.
Summary of changes:
- integration of Cisco work on nFAPI.
See commits 7757b9e7e7
and 922b5b595a for details.
- support Ubuntu 17.04 and 17.10
- bugfix: DCI padding bits
This bug made the system non-working because the DCIs for
SIBs were wrong. See commit c5ca2bd862
for details.
- fix issue 281: IQ record/playback explicit filename segv.
This commit fixes issues introduced by the previous commit.
Summary of work:
- cleanup:
- fix LOG_XX to be less verbose
- fix cmake_targets/CMakeLists.txt
- fix oaienv
- remove dead code
- bug fixes:
- in openair1/SCHED/fapi_l1.c we had:
eNB->pdcch_vars[subframe&1].num_dci = number_dci;
should be:
eNB->pdcch_vars[subframe&1].num_dci = 0;
This bug let the PHY send more DCIs than what should have been
sent because num_dci is incremented later on in the code.
This fix may be a problem for fapi mode, to be checked.
- add new T VCD traces
- revert openair1/PHY/TOOLS/file_output.c to 'develop' version
- remove thread_id in logRecord/logRecord_mt
- revert (and adapt) configuration files
- be careful when doing frame++, we need to % 1024
- revert target_rx_power in openair2/LAYER2/MAC/eNB_scheduler_ulsch.c
- NFAPI:
- the open-nFAPI code has been included in the repository. See nfapi/README.
Maybe we should "git clone" the Cisco repository instead. We have to be
careful of availability though.
What has been tested:
- monolithic eNB FDD 5/10MHz with one UE, iperf UDP/TCP uplink/downlink
Anything else may fail to work, especially the FAPI mode, which has not
been tested at all.
It has been chosen to not include the full history of commits
from David. He included a binary version of wireshark, probably
a modified one that understands NFAPI. Wireshark is released under
the GPL license, we cannot include it in the repository. We could
have done a next commit to remove this binary. But then it would
still be present in the history of commits, which may not be allowed.
And it would take space on disk. We could edit the history to remove
wireshark entirely. But this operation is too complicated.
There was also a pcap capture file, which has nothing to do in
the history of commits and would take space on disk. There again,
it's too difficult to edit the history to remove it.
There was a file .gitignore that was also removed.
The original history can be found on David's repository:
https://gitlab.eurecom.fr/daveprice/openairinterface5g/
The branch is: nfapi-ru-rau-split.
A copy of that branch has been included in the internal OAI
repository, for those who have access to it.
The branch is the same. The last commit ID is
9106438239e0bc626ff1fa1d97d911caadd0fbb9.
You can compare the current commit with the commit 9106...
to see what differs.
The current commit has to be considered non-working.
The commit following the current commit will fix problems with
the work in the current commit.
If you use git bisect, don't spend time analyzing the current
commit.
Xu Bo