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Commit 58b9481c authored by Matthieu Kanj's avatar Matthieu Kanj
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NPDCCH functions

parent e901ecdf
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Showing with 19 additions and 60 deletions
openair1/PHY/LTE_TRANSPORT/dci_NB_IoT.c
View file @ 58b9481c
......@@ -49,16 +49,11 @@
//#include "assertions.h"
//#include "T.h"
/////////////////////////////////////////////////////////////////////
//------------------------------------------------
// BCOM code functions npdcch start
// (TODO solve some error in compilation)
//------------------------------------------------
//static uint8_t d[2][3*(MAX_DCI_SIZE_BITS_NB_IoT + 16) + 96];
//static uint8_t w[2][3*3*(MAX_DCI_SIZE_BITS_NB_IoT+16)];
void dci_encoding_NB_IoT(uint8_t *a, // Array of two DCI pdus, even if one DCI is to transmit , the number of DCI is indicated in dci_number
NB_IoT_eNB_NPDCCH_t *dlcch, ////uint8_t *e[2], // *e should be e[2][G]
uint8_t A,
......@@ -85,15 +80,15 @@ void dci_encoding_NB_IoT(uint8_t *a, // Array of tw
}
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
///The scrambling sequence shall be initialised at the start of the search space and after every 4th NPDCCH subframes.
///
///
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
void npdcch_scrambling_NB_IoT(LTE_DL_FRAME_PARMS *frame_parms,
uint8_t *e, // Input data
int length, // Total number of bits to transmit in one subframe(case of DCI = G)
NB_IoT_eNB_NPDCCH_t *dlcch, // Input data
int G, // Total number of bits to transmit in one subframe(case of DCI = G)
uint8_t Ns, //XXX we pass the subframe // Slot number (0..19)
uint8_t dci_number, // This variable should takes the 1 or 2 (1 for in case of one DCI, 2 in case of two DCI)
uint8_t ncce_index,
uint8_t agr_level) // Aggregation level
{
int i;
......@@ -103,61 +98,28 @@ void npdcch_scrambling_NB_IoT(LTE_DL_FRAME_PARMS *frame_parms,
reset = 1;
if(agr_level == 2)
if(agr_level == 2 && ncce_index == 1)
{
occupation_size=1;
}else{
occupation_size=2;
}
if(dci_number == 1) // Case of one DCI
{
x2 = ((Ns>>1)<<9) + frame_parms->Nid_cell; // This is c_init in 36.211 Sec 10.2.3.1
for (i=0; i<length/occupation_size; i++) {
for (i=0; i<G/occupation_size; i++) {
if ((i&0x1f)==0) {
s = lte_gold_generic_NB_IoT(&x1, &x2, reset);
reset = 0;
}
e[i] = (e[i]&1) ^ ((s>>(i&0x1f))&1);
dlcch->npdcch_e[ncce_index-1][i] = (dlcch->npdcch_e[ncce_index-1][i]&1) ^ ((s>>(i&0x1f))&1);
}
}else if(dci_number == 2 && occupation_size == 2) { // Case of two DCI
// Scrambling the first DCI
//
x2 = ((Ns>>1)<<9) + frame_parms->Nid_cell; // This is c_init in 36.211 Sec 10.2.3.1
for (i=0; i<length/occupation_size; i++) {
if ((i&0x1f)==0) {
s = lte_gold_generic_NB_IoT(&x1, &x2, reset);
reset = 0;
}
e[i] = (e[i]&1) ^ ((s>>(i&0x1f))&1);
}
// reset of the scrambling function
reset = 1;
// Scrambling the second DCI
//
x2 = ((Ns>>1)<<9) + frame_parms->Nid_cell; //this is c_init in 36.211 Sec 10.2.3.1
for (i=0; i<length/occupation_size; i++) {
if ((i&0x1f)==0) {
s = lte_gold_generic_NB_IoT(&x1, &x2, reset);
reset = 0;
}
e[i] = (e[i]&1) ^ ((s>>(i&0x1f))&1);
}
}
}
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
int dci_allocate_REs_in_RB_NB_IoT(LTE_DL_FRAME_PARMS *frame_parms,
int32_t **txdataF,
uint32_t *jj,
......@@ -321,10 +283,7 @@ int dci_allocate_REs_in_RB_NB_IoT(LTE_DL_FRAME_PARMS *frame_parms,
return(0);
}
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
int dci_modulation_NB_IoT(int32_t **txdataF,
......
openair1/PHY/LTE_TRANSPORT/proto_NB_IoT.h
View file @ 58b9481c
......@@ -290,10 +290,10 @@ void dci_encoding_NB_IoT(uint8_t *a,
void npdcch_scrambling_NB_IoT(LTE_DL_FRAME_PARMS *frame_parms,
uint8_t *e,
int length,
uint8_t Ns,
uint8_t dci_number,
NB_IoT_eNB_NPDCCH_t *dlcch, // Input data
int G, // Total number of bits to transmit in one subframe(case of DCI = G)
uint8_t Ns, //XXX we pass the subframe // Slot number (0..19)
uint8_t ncce_index,
uint8_t agr_level);
......
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