* use appropriate types for coding scheme parameters
* add comment regarding possible number of RLCMAC blocks
The code in create_dl_acked_block() has underlying assumption that
rlc.num_data_blocks can never be more than 2, which is true and is
enforced by appropriate asserts but is not obvious when looking at the
function code alone. It's equally hard for Coverity which leads to false
positives in scan.
Lets' make this assumption explicit by putting it into for(;;) condition
alongside with corresponding comment.
Fixes: CID143070
Change-Id: If599a6c8a6ef56d847604fcf41bb71decccd8a78
The coding scheme converted to number make sense only if it's
valid. This is implicitly assumed by the code using this conversion as
non-zero value. Make those assumptions explicit with OSMO_ASSERT().
Change-Id: I8f62627b7b7b89dfa1b0d1a7e71b95b2c40fdffa
Fixes: CID70466
Modify the EGPRS DL TBF flow to support Split block during
Retx. This patch will also Upgrade the test suite with test cases
to validate the EGPRS Downlink SPB for Retransmission
Scenarios like MCS6->MCS3, MCS4->MCS1, MCS5->MCS2, MCS9->MCS3
MCS7->MCS2, MCS8->MCS3 have been simulated and Integration tested
in NuRAN 1.0 hardware thoroughly.
Change-Id: I242afdd8ae7622dec8593b26382ad66bad5b9516
Modify the existing data structure to support ARQ-II for Retx in EGPRS DL.
This will also hadle compilation issue related to renaming the variable.
Change-Id: I734b1024bb32f2daa43af4adf59f4a17f2294afe
Return the amount of optional padding bits, which is 6*8 for
MCS-3 and MCS-6 and 0 for all other coding schemes. The padding
is needed the encode 68 byte data blocks (MCS-8) with these schemes.
See TS 44.060, 9.3.2.1 and Annex J for details.
Sponsored-by: On-Waves ehf
Currently the RLC message length that is obtained from the DSP is
reduced by 1 if the last byte of the buffer includes spare bits.
While this worked well with GPRS, these bits are being used to
encode RLC blocks in EGPRS mode. Thus this last byte must not be
chopped off. The functionality of the code is not affected by this,
since the modified length value is not used.
This commit adds GprsCodingScheme::usedSizeDL/UL to return
the number of bytes needed to encode the message block. If there are
single bits at the end that are to be used (EGPRS), the functions
return the number of full bytes plus 1 (which is the buffer size
reported by the DSP and returned by sizeUL/sizeDL). The commit also
removes the len parameter from rcv_data_block_acknowledged.
Sponsored-by: On-Waves ehf
This commit adds the methods maxDataBlockBytes and numDataBlocks
which provide information about the data areas within RLC messages.
In these areas, the extension bytes, TLLI, and the LLC data are
stored.
Sponsored-by: On-Waves ehf
The header type depends on the coding scheme, for GPRS there is a
single data header type per direction, for EGPRS there are 3 per
direction. In addition, control block header types are used with CS-1
only, so there is one of the per direction altogether for GRPS and
EGPRS.
This commit adds the header type enum and two methods headerTypeData
and headerTypeControl.
Sponsored-by: On-Waves ehf
Currently the coding scheme is checked and compared at different
places which makes in cumbersome to extend it for EGPRS.
This class encapsules the coding scheme and provides required meta
information like sizes as well as helper methods.
Sponsored-by: On-Waves ehf
Max