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2016-08-25Modify EGPRS DL TBF flow to support SPBAravind Sirsikar1-18/+20
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
2016-07-14egprs: Use RLC/MAC headers from libosmocoreTom Tsou1-36/+37
EGPRS Type 1, 2, and 3 headers are used by OsmoPCU and OsmoBTS. Move the header definitions to libosmocore to be shared by both packages. Modify the struct variable naming to use *_hi/*_lo instead of *_a/*_b in order to be consistent with existing naming used in libosmocore. Change-Id: I98687ad981d27502aec42729611937ba1caf207c
2016-06-17Add test cases for Header type1 in EGPRS ULAravind Sirsikar2-0/+124
Update test suite with test cases for Header type 1 in EGPRS UL Change-Id: I21811bb126dbe151b0708a964d3143bc2fd52389 Reviewed-on: https://gerrit.osmocom.org/272 Tested-by: Jenkins Builder Reviewed-by: Harald Welte <laforge@gnumonks.org>
2016-06-15Add test cases for Header Type 2 in EGPRS ULAravind Sirsikar2-1/+128
Updates the test suite to add test cases for Header type 2 parsing in EGPRS UL. Change-Id: I1dd46010065a6d6da21e8e45af71e6d5f649b0b0 Reviewed-on: https://gerrit.osmocom.org/271 Reviewed-by: Harald Welte <laforge@gnumonks.org> Tested-by: Jenkins Builder Reviewed-by: Holger Freyther <holger@freyther.de>
2016-06-07encoding/rlc_copy_from_aligned_buffer: export written payload bytes via an ↵Alexander Couzens1-26/+81
argument Require to count statistics for rlc_dl_payload_bytes. Change-Id: I0e622acb1f13f7489946baf049de4ba1cde6a1fc Reviewed-on: https://gerrit.osmocom.org/142 Tested-by: Jenkins Builder Reviewed-by: Holger Freyther <holger@freyther.de>
2016-02-08rlc: Add with_padding argument to gprs_rlc_data_info_init_dl/ulJacob Erlbeck1-18/+18
The offsets of the data areas change when padding is used (see TS 44.060, 9.3.2.1 and Annex J for details). Extend the parameter lists to pass the with_padding flag and use that information to compute the correct offsets. Sponsored-by: On-Waves ehf
2016-02-08cs: Add GprsCodingScheme::optionalPaddingBitsJacob Erlbeck1-1/+2
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
2016-02-08cs: Add family related methodsJacob Erlbeck1-0/+13
Add family handling and the related methods family, isFamilyCompatible, isCombinable, decToSingleBlock to GprsCodingScheme. Sponsored-by: On-Waves ehf
2016-02-05edge: Support MCS data block encodingJacob Erlbeck1-0/+243
Currently only GPRS data block encoding is supported. This commit adds rlc_data_to_dl_append_egprs which does the EGPRS specific extension and chunk handling. It extends Encoding::rlc_data_to_dl_append to use that function for MCS coding schemes. Sponsored-by: On-Waves ehf
2016-02-05edge: Select implementation by mode in rlc_data_to_dl_appendJacob Erlbeck1-13/+13
Currently the GPRS data block encoding is applied to every coding scheme, even if an MCS is selected. This commit renames the actual encoding function to rlc_data_to_dl_append_gprs (not exported) and puts selection code into Encoding::rlc_data_to_dl_append. This requires an additional cs argument. Sponsored-by: On-Waves ehf
2016-02-05edge: Add Encoding::rlc_data_to_dl_appendJacob Erlbeck2-0/+253
This function appends a single chunk to an RLC downlink data block. The implementation is basically taken from the gprs_rlcmac_dl_tbf::create_new_bsn method without the TBF related functionality and any side effects. Note that it still only supports GRPS. Sponsored-by: On-Waves ehf
2016-02-05edge: Add encoder for downlink RLC data blocksJacob Erlbeck1-0/+70
Currently the (GPRS) RLC block encoding is done by setting the header fields directly in gprs_rlcmac_dl_tbf::create_new_bsn. This is much more complex with EGPRS, since the data fields are not byte aligned, the header formats depend on the header type, and the mapping of bits to bytes is LSB first. This commit adds Encoding::rlc_write_dl_data_header which writes the header according to the given gprs_rlc_data_header structure. Encoding::rlc_copy_from_aligned_buffer is also added to copy byte sequences into the message. Note that the actual encoding of data units is not yet present. Sponsored-by: On-Waves ehf
2016-02-05edge: Add init functions for gprs_rlc_data_infoJacob Erlbeck2-0/+20
Add the functions gprs_rlc_data_info_init_dl/ul which initialise a gprs_rlc_data_info structure depending on the coding scheme. The fields num_data_blocks, data_offs_bits, cs, and the data_blocks are valid after this call. The other fields are set to 0. The data blocks are initialised to the correct data_len, e == 1 (no extension header field), cv == 15 (not a final block). The other data block fields are set to 0. The gprs_rlc_data_block_info can also be initialised separately by using the gprs_rlc_data_block_info_init function. Sponsored-by: On-Waves ehf
2016-02-05edge: Fix RLC message sizeJacob Erlbeck1-4/+4
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
2016-02-05edge: Rename gprs_rlc_ul_header_egprs and gprs_rlc_ul_data_block_infoJacob Erlbeck1-1/+1
These struct names are more specific than necessary. They are used for GPRS (uplink) already. In downlink direction, only a few fields will be added to the header struct. Add addition, gprs_rlc_ul_header_egprs does not map directly to an encoded header, like many other 'header' structs do. Change the names to fit both modes and both directions: gprs_rlc_ul_header_egprs -> gprs_rlc_data_info gprs_rlc_ul_data_block_info -> gprs_rlc_data_block_info Sponsored-by: On-Waves ehf
2016-02-01edge: Add methods and operators to GprsCodingSchemeJacob Erlbeck1-3/+4
Add a few new operators and methods to support the use of GprsCodingScheme instead of the plain integer currently used. Sponsored-by: On-Waves ehf
2016-02-01edge/test: Rename test_rlc_decoder to test_rlc_unit_decoderJacob Erlbeck2-4/+4
This test only covers RLC data units and not whole RLC messages. Sponsored-by: On-Waves ehf
2015-12-16edge: Add test cases for rlc_data_from_ul_dataJacob Erlbeck2-0/+314
This checks the example test cases given in appendix B of TS 44.060. Sponsored-by: On-Waves ehf
2015-12-15edge: Add information about data blocks to GprsCodingSchemeJacob Erlbeck1-0/+4
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
2015-12-15edge: Add header type property to GprsCodingSchemeJacob Erlbeck1-0/+6
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
2015-12-15edge: Add test for GprsCodingSchemeJacob Erlbeck2-0/+222
This test checks constructors, predicates, and operators of the GprsCodingScheme class. Sponsored-by: On-Waves ehf
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