diff options
Diffstat (limited to 'src/gprs_coding_scheme.cpp')
| -rw-r--r-- | src/gprs_coding_scheme.cpp | 287 |
1 files changed, 107 insertions, 180 deletions
diff --git a/src/gprs_coding_scheme.cpp b/src/gprs_coding_scheme.cpp index 8601d4f..232cee3 100644 --- a/src/gprs_coding_scheme.cpp +++ b/src/gprs_coding_scheme.cpp @@ -25,61 +25,110 @@ static struct { struct { unsigned int bytes; unsigned int ext_bits; - unsigned int data_header_bits; } uplink, downlink; unsigned int data_bytes; - unsigned int optional_padding_bits; + unsigned int num_blocks; const char *name; GprsCodingScheme::HeaderType data_hdr; - GprsCodingScheme::Family family; } mcs_info[GprsCodingScheme::NUM_SCHEMES] = { - {{0, 0}, {0, 0}, 0, 0, "UNKNOWN", - GprsCodingScheme::HEADER_INVALID, GprsCodingScheme::FAMILY_INVALID}, - {{23, 0}, {23, 0}, 20, 0, "CS-1", - GprsCodingScheme::HEADER_GPRS_DATA, GprsCodingScheme::FAMILY_INVALID}, - {{33, 7}, {33, 7}, 30, 0, "CS-2", - GprsCodingScheme::HEADER_GPRS_DATA, GprsCodingScheme::FAMILY_INVALID}, - {{39, 3}, {39, 3}, 36, 0, "CS-3", - GprsCodingScheme::HEADER_GPRS_DATA, GprsCodingScheme::FAMILY_INVALID}, - {{53, 7}, {53, 7}, 50, 0, "CS-4", - GprsCodingScheme::HEADER_GPRS_DATA, GprsCodingScheme::FAMILY_INVALID}, + {{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}, +}; - {{26, 1}, {26, 1}, 22, 0, "MCS-1", - GprsCodingScheme::HEADER_EGPRS_DATA_TYPE_3, GprsCodingScheme::FAMILY_C}, - {{32, 1}, {32, 1}, 28, 0, "MCS-2", - GprsCodingScheme::HEADER_EGPRS_DATA_TYPE_3, GprsCodingScheme::FAMILY_B}, - {{41, 1}, {41, 1}, 37, 48, "MCS-3", - GprsCodingScheme::HEADER_EGPRS_DATA_TYPE_3, GprsCodingScheme::FAMILY_A}, - {{48, 1}, {48, 1}, 44, 0, "MCS-4", - GprsCodingScheme::HEADER_EGPRS_DATA_TYPE_3, GprsCodingScheme::FAMILY_C}, +/* 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) */ - {{60, 7}, {59, 6}, 56, 0, "MCS-5", - GprsCodingScheme::HEADER_EGPRS_DATA_TYPE_2, GprsCodingScheme::FAMILY_B}, - {{78, 7}, {77, 6}, 74, 48, "MCS-6", - GprsCodingScheme::HEADER_EGPRS_DATA_TYPE_2, GprsCodingScheme::FAMILY_A}, - {{118, 2}, {117, 4}, 56, 0, "MCS-7", - GprsCodingScheme::HEADER_EGPRS_DATA_TYPE_1, GprsCodingScheme::FAMILY_B}, - {{142, 2}, {141, 4}, 68, 0, "MCS-8", - GprsCodingScheme::HEADER_EGPRS_DATA_TYPE_1, GprsCodingScheme::FAMILY_A}, - {{154, 2}, {153, 4}, 74, 0, "MCS-9", - GprsCodingScheme::HEADER_EGPRS_DATA_TYPE_1, GprsCodingScheme::FAMILY_A}, +/* 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) */ }; -static struct { - struct { - int data_header_bits; - } uplink, downlink; - unsigned int data_block_header_bits; - unsigned int num_blocks; - const char *name; -} hdr_type_info[GprsCodingScheme::NUM_HEADER_TYPES] = { - {{0}, {0}, 0, 0, "INVALID"}, - {{1*8 + 0}, {1*8 + 0}, 0, 0, "CONTROL"}, - {{3*8 + 0}, {3*8 + 0}, 0, 1, "GPRS_DATA"}, - {{5*8 + 6}, {5*8 + 0}, 2, 2, "EGPRS_DATA_TYPE1"}, - {{4*8 + 5}, {3*8 + 4}, 2, 1, "EGPRS_DATA_TYPE2"}, - {{3*8 + 7}, {3*8 + 7}, 2, 1, "EGPRS_DATA_TYPE3"}, +/* 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) { @@ -92,11 +141,11 @@ GprsCodingScheme GprsCodingScheme::getBySizeUL(unsigned size) case 42: return GprsCodingScheme(MCS3); case 49: return GprsCodingScheme(MCS4); case 54: return GprsCodingScheme(CS4); - case 61: return GprsCodingScheme(MCS5); - case 79: return GprsCodingScheme(MCS6); - case 119: return GprsCodingScheme(MCS7); - case 143: return GprsCodingScheme(MCS8); - case 155: return GprsCodingScheme(MCS9); + 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); @@ -104,15 +153,7 @@ GprsCodingScheme GprsCodingScheme::getBySizeUL(unsigned size) unsigned int GprsCodingScheme::sizeUL() const { - return mcs_info[m_scheme].uplink.bytes + (spareBitsUL() ? 1 : 0); -} - -unsigned int GprsCodingScheme::usedSizeUL() const -{ - if (mcs_info[m_scheme].data_hdr == HEADER_GPRS_DATA) - return mcs_info[m_scheme].uplink.bytes; - else - return sizeUL(); + return maxBytesUL() + (spareBitsUL() ? 1 : 0); } unsigned int GprsCodingScheme::maxBytesUL() const @@ -127,15 +168,7 @@ unsigned int GprsCodingScheme::spareBitsUL() const unsigned int GprsCodingScheme::sizeDL() const { - return mcs_info[m_scheme].downlink.bytes + (spareBitsDL() ? 1 : 0); -} - -unsigned int GprsCodingScheme::usedSizeDL() const -{ - if (mcs_info[m_scheme].data_hdr == HEADER_GPRS_DATA) - return mcs_info[m_scheme].downlink.bytes; - else - return sizeDL(); + return maxBytesDL() + (spareBitsDL() ? 1 : 0); } unsigned int GprsCodingScheme::maxBytesDL() const @@ -153,29 +186,14 @@ unsigned int GprsCodingScheme::maxDataBlockBytes() const return mcs_info[m_scheme].data_bytes; } -unsigned int GprsCodingScheme::optionalPaddingBits() const -{ - return mcs_info[m_scheme].optional_padding_bits; -} - unsigned int GprsCodingScheme::numDataBlocks() const { - return hdr_type_info[headerTypeData()].num_blocks; -} - -unsigned int GprsCodingScheme::numDataHeaderBitsUL() const -{ - return hdr_type_info[headerTypeData()].uplink.data_header_bits; -} - -unsigned int GprsCodingScheme::numDataHeaderBitsDL() const -{ - return hdr_type_info[headerTypeData()].downlink.data_header_bits; + return mcs_info[m_scheme].num_blocks; } -unsigned int GprsCodingScheme::numDataBlockHeaderBits() const +GprsCodingScheme::Scheme GprsCodingScheme::coding_scheme() const { - return hdr_type_info[headerTypeData()].data_block_header_bits; + return m_scheme; } const char *GprsCodingScheme::name() const @@ -188,99 +206,8 @@ GprsCodingScheme::HeaderType GprsCodingScheme::headerTypeData() const return mcs_info[m_scheme].data_hdr; } -GprsCodingScheme::Family GprsCodingScheme::family() const -{ - return mcs_info[m_scheme].family; -} - -void GprsCodingScheme::inc(Mode mode) +GprsCodingScheme::Scheme GprsCodingScheme::get_retx_mcs(GprsCodingScheme *current_mcs) const { - if (!isCompatible(mode)) - /* This should not happen. TODO: Use assert? */ - return; - - Scheme new_cs(Scheme(m_scheme + 1)); - if (!GprsCodingScheme(new_cs).isCompatible(mode)) - /* Clipping, do not change the value */ - return; - - m_scheme = new_cs; -} - -void GprsCodingScheme::dec(Mode mode) -{ - if (!isCompatible(mode)) - /* This should not happen. TODO: Use assert? */ - return; - - Scheme new_cs(Scheme(m_scheme - 1)); - if (!GprsCodingScheme(new_cs).isCompatible(mode)) - /* Clipping, do not change the value */ - return; - - m_scheme = new_cs; -} - -void GprsCodingScheme::inc() -{ - if (isGprs() && m_scheme == CS4) - return; - - if (isEgprs() && m_scheme == MCS9) - return; - - if (!isValid()) - return; - - m_scheme = Scheme(m_scheme + 1); -} - -void GprsCodingScheme::dec() -{ - if (isGprs() && m_scheme == CS1) - return; - - if (isEgprs() && m_scheme == MCS1) - return; - - if (!isValid()) - return; - - m_scheme = Scheme(m_scheme - 1); -} - -const char *GprsCodingScheme::modeName(Mode mode) -{ - switch (mode) { - case GPRS: return "GPRS"; - case EGPRS_GMSK: return "EGPRS_GMSK-only"; - case EGPRS: return "EGPRS"; - default: return "???"; - } -} - -bool GprsCodingScheme::isFamilyCompatible(GprsCodingScheme o) const -{ - if (*this == o) - return true; - - if (family() == FAMILY_INVALID) - return false; - - return family() == o.family(); -} - -bool GprsCodingScheme::isCombinable(GprsCodingScheme o) const -{ - return numDataBlocks() == o.numDataBlocks(); -} - -void GprsCodingScheme::decToSingleBlock(bool *needStuffing) -{ - switch (m_scheme) { - case MCS7: *needStuffing = false; m_scheme = MCS5; break; - case MCS8: *needStuffing = true; m_scheme = MCS6; break; - case MCS9: *needStuffing = false; m_scheme = MCS6; break; - default: *needStuffing = false; break; - } + return egprs_mcs_retx_tbl[EGPRS_ARQ1][current_mcs->coding_scheme()- GprsCodingScheme::MCS1] + [this->m_scheme - GprsCodingScheme::MCS1]; } |