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/* gprs_coding_scheme.cpp
*
* Copyright (C) 2015 by Sysmocom s.f.m.c. GmbH
* Author: Jacob Erlbeck <jerlbeck@sysmocom.de>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "gprs_coding_scheme.h"
static struct {
struct {
unsigned int bytes;
unsigned int ext_bits;
} uplink, downlink;
unsigned int data_bytes;
unsigned int num_blocks;
const char *name;
GprsCodingScheme::HeaderType data_hdr;
} mcs_info[GprsCodingScheme::NUM_SCHEMES] = {
{{0, 0}, {0, 0}, 0, 0, "UNKNOWN", GprsCodingScheme::HEADER_INVALID},
{{23, 0}, {23, 0}, 20, 1, "CS-1", GprsCodingScheme::HEADER_GPRS_DATA},
{{33, 7}, {33, 7}, 30, 1, "CS-2", GprsCodingScheme::HEADER_GPRS_DATA},
{{39, 3}, {39, 3}, 36, 1, "CS-3", GprsCodingScheme::HEADER_GPRS_DATA},
{{53, 7}, {53, 7}, 50, 1, "CS-4", GprsCodingScheme::HEADER_GPRS_DATA},
{{26, 1}, {26, 1}, 22, 1, "MCS-1", GprsCodingScheme::HEADER_EGPRS_DATA_TYPE_3},
{{32, 1}, {32, 1}, 28, 1, "MCS-2", GprsCodingScheme::HEADER_EGPRS_DATA_TYPE_3},
{{41, 1}, {41, 1}, 37, 1, "MCS-3", GprsCodingScheme::HEADER_EGPRS_DATA_TYPE_3},
{{48, 1}, {48, 1}, 44, 1, "MCS-4", GprsCodingScheme::HEADER_EGPRS_DATA_TYPE_3},
{{60, 7}, {59, 6}, 56, 1, "MCS-5", GprsCodingScheme::HEADER_EGPRS_DATA_TYPE_2},
{{78, 7}, {77, 6}, 74, 1, "MCS-6", GprsCodingScheme::HEADER_EGPRS_DATA_TYPE_2},
{{118, 2}, {117, 4}, 56, 2, "MCS-7", GprsCodingScheme::HEADER_EGPRS_DATA_TYPE_1},
{{142, 2}, {141, 4}, 68, 2, "MCS-8", GprsCodingScheme::HEADER_EGPRS_DATA_TYPE_1},
{{154, 2}, {153, 4}, 74, 2, "MCS-9", GprsCodingScheme::HEADER_EGPRS_DATA_TYPE_1},
};
/* CPS table for Header Type 3 */
static uint8_t cps_header_type3[5][3] = /* 1st index: MCS; 2nd index: PS */
{{11, 12, 255}, /* MCS-1 */
{ 9, 10, 255}, /* MCS-2 */
{ 3, 4, 5}, /* MCS-3 */
{ 0, 1, 2}, /* MCS-4 */
{ 6, 7, 8}}; /* MCS-3 with padding (MCS-8 retransmission) */
/* CPS table for Header Type 2 */
static uint8_t cps_header_type2[3][2] = /* 1st index: MCS; 2nd index: PS */
{
{4, 5}, /* MCS-5 */
{0, 1}, /* MCS-6 */
{2, 3} /* MCS-6 with padding (MCS-8 retransmission) */
};
/* CPS table for Header Type 1 */
uint8_t cps_header_type1[3][3][3] =
{{{20,21,22}, /* MCS-7 / P1 / PX */
{23,24,25}, /* MCS-7 / P2 / PX */
{26,27,28} /* MCS-7 / P3 / PX */
},
{{11,12,13}, /* MCS-8 / P1 / PX */
{14,15,26}, /* MCS-8 / P2 / PX */
{17,18,19} /* MCS-8 / P3 / PX */
},
{{0,1,2}, /* MCS-9 / P1 / PX */
{4,5,6}, /* MCS-9 / P2 / PX */
{8,9,10} /* MCS-9 / P3 / PX */
}
};
/* MCS retransmission table */
/*
first indexing is for commanded, second indexing is for
mcs of last transmission
*/
GprsCodingScheme::Scheme egprs_mcs_retx_tbl[MAX_NUM_ARQ]
[MAX_NUM_MCS] [MAX_NUM_MCS] =
{{{GprsCodingScheme::MCS1,GprsCodingScheme::MCS2,GprsCodingScheme::MCS3,GprsCodingScheme::MCS1,GprsCodingScheme::MCS2,GprsCodingScheme::MCS3,GprsCodingScheme::MCS2,GprsCodingScheme::MCS3,GprsCodingScheme::MCS3},
{GprsCodingScheme::MCS1,GprsCodingScheme::MCS2,GprsCodingScheme::MCS3,GprsCodingScheme::MCS1,GprsCodingScheme::MCS2,GprsCodingScheme::MCS3,GprsCodingScheme::MCS2,GprsCodingScheme::MCS3,GprsCodingScheme::MCS3},
{GprsCodingScheme::MCS1,GprsCodingScheme::MCS2,GprsCodingScheme::MCS3,GprsCodingScheme::MCS1,GprsCodingScheme::MCS2,GprsCodingScheme::MCS3,GprsCodingScheme::MCS2,GprsCodingScheme::MCS3,GprsCodingScheme::MCS3},
{GprsCodingScheme::MCS1,GprsCodingScheme::MCS2,GprsCodingScheme::MCS3,GprsCodingScheme::MCS4,GprsCodingScheme::MCS2,GprsCodingScheme::MCS3,GprsCodingScheme::MCS2,GprsCodingScheme::MCS3,GprsCodingScheme::MCS3},
{GprsCodingScheme::MCS1,GprsCodingScheme::MCS2,GprsCodingScheme::MCS3,GprsCodingScheme::MCS4,GprsCodingScheme::MCS5,GprsCodingScheme::MCS3,GprsCodingScheme::MCS5,GprsCodingScheme::MCS3,GprsCodingScheme::GprsCodingScheme::MCS3},
{GprsCodingScheme::MCS1,GprsCodingScheme::MCS2,GprsCodingScheme::MCS3,GprsCodingScheme::MCS4,GprsCodingScheme::MCS5,GprsCodingScheme::MCS6,GprsCodingScheme::MCS5,GprsCodingScheme::MCS6,GprsCodingScheme::MCS6},
{GprsCodingScheme::MCS1,GprsCodingScheme::MCS2,GprsCodingScheme::MCS3,GprsCodingScheme::MCS4,GprsCodingScheme::MCS5,GprsCodingScheme::MCS6,GprsCodingScheme::MCS5,GprsCodingScheme::MCS6,GprsCodingScheme::MCS6},
{GprsCodingScheme::MCS1,GprsCodingScheme::MCS2,GprsCodingScheme::MCS3,GprsCodingScheme::MCS4,GprsCodingScheme::MCS5,GprsCodingScheme::MCS6,GprsCodingScheme::MCS5,GprsCodingScheme::MCS6,GprsCodingScheme::MCS6},
{GprsCodingScheme::MCS1,GprsCodingScheme::MCS2,GprsCodingScheme::MCS3,GprsCodingScheme::MCS4,GprsCodingScheme::MCS5,GprsCodingScheme::MCS6,GprsCodingScheme::MCS5,GprsCodingScheme::MCS6,GprsCodingScheme::MCS6}
},
{{GprsCodingScheme::MCS1,GprsCodingScheme::MCS2,GprsCodingScheme::MCS3,GprsCodingScheme::MCS4,GprsCodingScheme::MCS5,GprsCodingScheme::MCS6,GprsCodingScheme::MCS5,GprsCodingScheme::MCS6,GprsCodingScheme::MCS6},
{GprsCodingScheme::MCS1,GprsCodingScheme::MCS2,GprsCodingScheme::MCS3,GprsCodingScheme::MCS4,GprsCodingScheme::MCS5,GprsCodingScheme::MCS6,GprsCodingScheme::MCS5,GprsCodingScheme::MCS6,GprsCodingScheme::MCS6},
{GprsCodingScheme::MCS1,GprsCodingScheme::MCS2,GprsCodingScheme::MCS3,GprsCodingScheme::MCS4,GprsCodingScheme::MCS5,GprsCodingScheme::MCS6,GprsCodingScheme::MCS5,GprsCodingScheme::MCS6,GprsCodingScheme::MCS6},
{GprsCodingScheme::MCS1,GprsCodingScheme::MCS2,GprsCodingScheme::MCS3,GprsCodingScheme::MCS4,GprsCodingScheme::MCS5,GprsCodingScheme::MCS6,GprsCodingScheme::MCS5,GprsCodingScheme::MCS6,GprsCodingScheme::MCS6},
{GprsCodingScheme::MCS1,GprsCodingScheme::MCS2,GprsCodingScheme::MCS3,GprsCodingScheme::MCS4,GprsCodingScheme::MCS5,GprsCodingScheme::MCS6,GprsCodingScheme::MCS5,GprsCodingScheme::MCS6,GprsCodingScheme::MCS6},
{GprsCodingScheme::MCS1,GprsCodingScheme::MCS2,GprsCodingScheme::MCS3,GprsCodingScheme::MCS4,GprsCodingScheme::MCS5,GprsCodingScheme::MCS6,GprsCodingScheme::MCS5,GprsCodingScheme::MCS6,GprsCodingScheme::MCS6},
{GprsCodingScheme::MCS1,GprsCodingScheme::MCS2,GprsCodingScheme::MCS3,GprsCodingScheme::MCS4,GprsCodingScheme::MCS5,GprsCodingScheme::MCS6,GprsCodingScheme::MCS5,GprsCodingScheme::MCS6,GprsCodingScheme::MCS6},
{GprsCodingScheme::MCS1,GprsCodingScheme::MCS2,GprsCodingScheme::MCS3,GprsCodingScheme::MCS4,GprsCodingScheme::MCS5,GprsCodingScheme::MCS6,GprsCodingScheme::MCS5,GprsCodingScheme::MCS6,GprsCodingScheme::MCS6},
{GprsCodingScheme::MCS1,GprsCodingScheme::MCS2,GprsCodingScheme::MCS3,GprsCodingScheme::MCS4,GprsCodingScheme::MCS5,GprsCodingScheme::MCS6,GprsCodingScheme::MCS5,GprsCodingScheme::MCS6,GprsCodingScheme::MCS6}
}
};
uint8_t GprsCodingScheme::get_cps(uint8_t ps, bool is_padding)
{
if(this->headerTypeData() == GprsCodingScheme::HEADER_EGPRS_DATA_TYPE_1){
return cps_header_type1[this->m_scheme - MCS1 ][ps][ps];
}else if(this->headerTypeData() == GprsCodingScheme::HEADER_EGPRS_DATA_TYPE_2){
if((this->m_scheme == GprsCodingScheme::MCS6) && true == is_padding){
return cps_header_type2[this->m_scheme - MCS5 + 1][ps];
}else{
return cps_header_type2[this->m_scheme - MCS5 ][ps];
}
}else if(this->headerTypeData() == GprsCodingScheme::HEADER_EGPRS_DATA_TYPE_3){
if( this->m_scheme == GprsCodingScheme::MCS3 && true == is_padding){
return cps_header_type3[this->m_scheme - MCS1 + 2][ps];
}else{
return cps_header_type3[this->m_scheme -MCS1][ps];
}
}
return 255;
}
GprsCodingScheme GprsCodingScheme::getBySizeUL(unsigned size)
{
switch (size) {
case 23: return GprsCodingScheme(CS1);
case 27: return GprsCodingScheme(MCS1);
case 33: return GprsCodingScheme(MCS2);
case 34: return GprsCodingScheme(CS2);
case 40: return GprsCodingScheme(CS3);
case 42: return GprsCodingScheme(MCS3);
case 49: return GprsCodingScheme(MCS4);
case 54: return GprsCodingScheme(CS4);
case 62: return GprsCodingScheme(MCS5);
case 80: return GprsCodingScheme(MCS6);
case 120: return GprsCodingScheme(MCS7);
case 144: return GprsCodingScheme(MCS8);
case 156: return GprsCodingScheme(MCS9);
}
return GprsCodingScheme(UNKNOWN);
}
unsigned int GprsCodingScheme::sizeUL() const
{
return maxBytesUL() + (spareBitsUL() ? 1 : 0);
}
unsigned int GprsCodingScheme::maxBytesUL() const
{
return mcs_info[m_scheme].uplink.bytes;
}
unsigned int GprsCodingScheme::spareBitsUL() const
{
return mcs_info[m_scheme].uplink.ext_bits;
}
unsigned int GprsCodingScheme::sizeDL() const
{
return maxBytesDL() + (spareBitsDL() ? 1 : 0);
}
unsigned int GprsCodingScheme::maxBytesDL() const
{
return mcs_info[m_scheme].downlink.bytes;
}
unsigned int GprsCodingScheme::spareBitsDL() const
{
return mcs_info[m_scheme].downlink.ext_bits;
}
unsigned int GprsCodingScheme::maxDataBlockBytes() const
{
return mcs_info[m_scheme].data_bytes;
}
unsigned int GprsCodingScheme::numDataBlocks() const
{
return mcs_info[m_scheme].num_blocks;
}
GprsCodingScheme::Scheme GprsCodingScheme::coding_scheme() const
{
return m_scheme;
}
const char *GprsCodingScheme::name() const
{
return mcs_info[m_scheme].name;
}
GprsCodingScheme::HeaderType GprsCodingScheme::headerTypeData() const
{
return mcs_info[m_scheme].data_hdr;
}
GprsCodingScheme::Scheme GprsCodingScheme::get_retx_mcs(GprsCodingScheme *current_mcs) const
{
return egprs_mcs_retx_tbl[EGPRS_ARQ1][current_mcs->coding_scheme()- GprsCodingScheme::MCS1]
[this->m_scheme - GprsCodingScheme::MCS1];
}
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