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Move the gprs_rlcmac_poll_timeout method into the tbf class and
gprs_rlcmac_downlink_assignment into the BTS.
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Simplify the depedencies and use the inline functions when we need
to figure out the numbers.
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The timer is used for various timeouts and there is still external
client code that is calling it. In a perfect world the client code
would indicate that an event has happened and the internal timer
will be stopped. The best compromise is the "stop_t3191" method. It
allows to add semantic verification that the timer has been running.
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Move the dispatch into the PDCH. This needs to be split up
further into understandable blocks.
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Move the method into the PDCH. Extract the finding of TLLI into a
new class called Decoding. Move the assemble and forward LLC frames
into the TBF as it is poking in the internals of the TBF.
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All dispatching will go through the PDCH. This will clean a lot
of the look-ups inside the gprs_rlcmac_data.c and continue with
adding structure to the pcu code.
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Simplify the reset code now that the PDCH can know where it is
located. Rename the variables in the sba to trx_no and ts_no as
it stores the number and not the actual thing.
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This will allow to kill various parameters from all the functions
as we can walk back.
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The list belongs to the BTS. This makes cleaning this up more easy
and establishes a hierachy of resources that start from the BTS. The
debug_diagram code is now broken.
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The PollController is a friend of the SBAController and is allowed
to access the internal list. The list is hidden from everyone else.
This is done because the calculation of timeout should belong into
the PollController and not into the SBAController.
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Add some TODO to this class. E.g. they could all work on the
bitvec and the parameter handling could better.
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Only the gprs_rlcmac_pdch will manipulate the paging list now. There
can be various more refactorings of the code but they can be done
later. E.g. on memory allocation failure we can continue instead
of leaving the code, we should also set any_tbf only after things
have been paged.
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Rely on packet_paging_request returning NULL in case the queue
is empty. We should move the write_packet_paging_request into
a separate file/object as well.
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When a PDCH is disabled all resources should be freed. This is
currently not possible as the PDCH does not know where it belongs
to. On top of that the list (and other resources) should be
properly initialized on construction so that disable() is idempotent
and does not check if it was disabled. During the re-factoring I
noticed that during a sysmobts re-start some resources are not
freed. I left a warning in the code to resolve this issue later.
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For each frame indication received by the BTS the poll controller
is asked to expire timedout entries.
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The current_frame is an attribute of the BTS. Move it from the
pcu_l1_if.cpp into the BTS. As the next step we can trigger
actions depending on the change of the frame.
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Compared to the previous code there will be a branch to get the
global pointer so the code will be slightly slower than the previous
version but it allows us to start creating objects but still use
the code from C. It is best approach I have found so far.
One downside of C++ is that by default talloc will not be used
(unless we override the new operator to use talloc. Right now
we need to memset the C data structure by hand. The benefit of
enforcing a better structure should is more important though.
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