The unused bits are the lower bits, so we need to shift.

Not sure that the value 1 is what we want though.

merge the implemention of Paging, RRCConnectionRelease, RRCConnectionReestablishment, E-RAB Modify, E-RAB Release

update SidelinkUEInformation (UE's side), RRCConnectionReconfiguration (eNB's side), add rrc_ue_process_radioResourceConfig to process RPs and configure MAC/PHY

- compile with warning enabled (changes in CMakeLists.txt)
- remove warnings that were present

- allocate memory, memory on stack does not survive the function
- avoid uint32_t, use a char buffer, for endianness neutrality

- carrier->MIB will be reused, so "spare" has to be allocated
- wrong parameters sent to uper_encode_to_buffer

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.

This generates too much prints and may disrupt realtime.
This has to be off by default.

- import RRC ASN.1 defintions from the specifications
  (file openair2/RRC/LITE/MESSAGES/asn1c/ASN1_files/RRC-e10.asn)
  contrary to rel8/10, all modules have been imported, maybe it's too much
  to refine in case of problems
- deal with rel14 in fix_asn1
- all code that was for Rel10 is now for Rel10/Rel14
- some incompatible changes (mostly in naming) were resolved in favor
  of rel14, see in openair2/RRC/LITE/defs.h
- unsure about the rlc layer, some arrays have changed (values appended),
  I only changed the definition and in tests in the code, I changed
  the index limit, maybe it's not enough

Rel14 is the default compilation mode.

Conflicts:
	openair1/PHY/INIT/lte_init.c
	openair1/PHY/LTE_TRANSPORT/dlsch_modulation.c
	openair1/PHY/LTE_TRANSPORT/power_control.c

Manually testing with the Samsung Galaxy Note 4 failed,
probably because the phone didn't like to receive SRS
configuration.

Let's send it only if activated.

           1- SRB2 fix
           2- attach accept, support type of list 0 with number of element = 1

           1- Implement SRS procedures