Commit fce9f0b5 authored by Wilson's avatar Wilson
Browse files

avoid detecting DCI0 at subframes where no DCI0s are sent by eNB. This happens only in TDD mode

issue !156
parent 8f6746be
......@@ -2648,6 +2648,7 @@ int get_nCCE_offset_l1(int *CCE_table,
void dci_decoding_procedure0(LTE_UE_PDCCH **pdcch_vars,
int do_common,
dci_detect_mode_t mode,
uint8_t subframe,
DCI_ALLOC_t *dci_alloc,
int16_t eNB_id,
......@@ -2685,6 +2686,11 @@ void dci_decoding_procedure0(LTE_UE_PDCCH **pdcch_vars,
if (nCCE<L2)
return;
if (mode == NO_DCI) {
LOG_D(PHY, "skip DCI decoding: expect no DCIs at subframe %d\n", subframe);
return;
}
if (do_common == 1) {
nb_candidates = (L2==4) ? 4 : 2;
Yk=0;
......@@ -2835,7 +2841,7 @@ void dci_decoding_procedure0(LTE_UE_PDCCH **pdcch_vars,
*dci_cnt = *dci_cnt+1;
} else if (crc==pdcch_vars[eNB_id]->crnti) {
if ((format_c == format0)&&((dci_decoded_output[0]&0x80)==0)) {// check if pdu is format 0 or 1A
if ((mode&UL_DCI)&&(format_c == format0)&&((dci_decoded_output[0]&0x80)==0)) {// check if pdu is format 0 or 1A
if (*format0_found == 0) {
dci_alloc[*dci_cnt].format = format0;
*format0_found = 1;
......@@ -2916,6 +2922,7 @@ uint16_t dci_decoding_procedure(PHY_VARS_UE *ue,
uint8_t format1_size_bits=0,format1_size_bytes=0;
uint8_t format2_size_bits=0,format2_size_bytes=0;
uint8_t format2A_size_bits=0,format2A_size_bytes=0;
dci_detect_mode_t mode = dci_detect_mode_select(&ue->frame_parms,subframe);
switch (frame_parms->N_RB_DL) {
case 6:
......@@ -3118,7 +3125,7 @@ uint16_t dci_decoding_procedure(PHY_VARS_UE *ue,
// First check common search spaces at aggregation 4 (SI_RNTI, P_RNTI and RA_RNTI format 0/1A),
// and UE_SPEC format0 (PUSCH) too while we're at it
dci_decoding_procedure0(pdcch_vars,1,subframe,
dci_decoding_procedure0(pdcch_vars,1,mode,subframe,
dci_alloc,
eNB_id,
frame_parms,
......@@ -3146,7 +3153,7 @@ uint16_t dci_decoding_procedure(PHY_VARS_UE *ue,
// Now check common search spaces at aggregation 4 (SI_RNTI,P_RNTI and RA_RNTI and C-RNTI format 1C),
// and UE_SPEC format0 (PUSCH) too while we're at it
dci_decoding_procedure0(pdcch_vars,1,subframe,
dci_decoding_procedure0(pdcch_vars,1,mode,subframe,
dci_alloc,
eNB_id,
frame_parms,
......@@ -3178,7 +3185,7 @@ uint16_t dci_decoding_procedure(PHY_VARS_UE *ue,
#ifdef DEBUG_DCI_DECODING
printf("[DCI search] doing common search/format0 aggregation 8\n");
#endif
dci_decoding_procedure0(pdcch_vars,1,subframe,
dci_decoding_procedure0(pdcch_vars,1,mode,subframe,
dci_alloc,
eNB_id,
frame_parms,
......@@ -3206,7 +3213,7 @@ uint16_t dci_decoding_procedure(PHY_VARS_UE *ue,
// Now check common search spaces at aggregation 8 (SI_RNTI and RA_RNTI and C-RNTI format 1C),
// and UE_SPEC format0 (PUSCH) too while we're at it
dci_decoding_procedure0(pdcch_vars,1,subframe,
dci_decoding_procedure0(pdcch_vars,1,mode,subframe,
dci_alloc,
eNB_id,
frame_parms,
......@@ -3239,7 +3246,7 @@ uint16_t dci_decoding_procedure(PHY_VARS_UE *ue,
// Now check UE_SPEC format0/1A ue_spec search spaces at aggregation 8
// printf("[DCI search] Format 0/1A aggregation 8\n");
dci_decoding_procedure0(pdcch_vars,0,
dci_decoding_procedure0(pdcch_vars,0,mode,
subframe,
dci_alloc,
eNB_id,
......@@ -3268,7 +3275,7 @@ uint16_t dci_decoding_procedure(PHY_VARS_UE *ue,
// printf("[DCI search] Format 0 aggregation 4\n");
// Now check UE_SPEC format 0 search spaces at aggregation 4
dci_decoding_procedure0(pdcch_vars,0,
dci_decoding_procedure0(pdcch_vars,0,mode,
subframe,
dci_alloc,
eNB_id,
......@@ -3301,7 +3308,7 @@ uint16_t dci_decoding_procedure(PHY_VARS_UE *ue,
// printf("[DCI search] Format 0 aggregation 2\n");
// Now check UE_SPEC format 0 search spaces at aggregation 2
dci_decoding_procedure0(pdcch_vars,0,
dci_decoding_procedure0(pdcch_vars,0,mode,
subframe,
dci_alloc,
eNB_id,
......@@ -3330,7 +3337,7 @@ uint16_t dci_decoding_procedure(PHY_VARS_UE *ue,
// printf("[DCI search] Format 0 aggregation 4\n");
// Now check UE_SPEC format 0 search spaces at aggregation 1
dci_decoding_procedure0(pdcch_vars,0,
dci_decoding_procedure0(pdcch_vars,0,mode,
subframe,
dci_alloc,
eNB_id,
......@@ -3364,7 +3371,7 @@ uint16_t dci_decoding_procedure(PHY_VARS_UE *ue,
if (tmode < 3) {
// Now check UE_SPEC format 1 search spaces at aggregation 1
old_dci_cnt=dci_cnt;
dci_decoding_procedure0(pdcch_vars,0,subframe,
dci_decoding_procedure0(pdcch_vars,0,mode,subframe,
dci_alloc,
eNB_id,
frame_parms,
......@@ -3395,7 +3402,7 @@ uint16_t dci_decoding_procedure(PHY_VARS_UE *ue,
// Now check UE_SPEC format 1 search spaces at aggregation 2
old_dci_cnt=dci_cnt;
dci_decoding_procedure0(pdcch_vars,0,subframe,
dci_decoding_procedure0(pdcch_vars,0,mode,subframe,
dci_alloc,
eNB_id,
frame_parms,
......@@ -3427,7 +3434,7 @@ uint16_t dci_decoding_procedure(PHY_VARS_UE *ue,
// Now check UE_SPEC format 1 search spaces at aggregation 4
old_dci_cnt=dci_cnt;
dci_decoding_procedure0(pdcch_vars,0,subframe,
dci_decoding_procedure0(pdcch_vars,0,mode,subframe,
dci_alloc,
eNB_id,
frame_parms,
......@@ -3459,7 +3466,7 @@ uint16_t dci_decoding_procedure(PHY_VARS_UE *ue,
//#ifdef ALL_AGGREGATION
// Now check UE_SPEC format 1 search spaces at aggregation 8
old_dci_cnt=dci_cnt;
dci_decoding_procedure0(pdcch_vars,0,subframe,
dci_decoding_procedure0(pdcch_vars,0,mode,subframe,
dci_alloc,
eNB_id,
frame_parms,
......@@ -3493,7 +3500,7 @@ uint16_t dci_decoding_procedure(PHY_VARS_UE *ue,
// Now check UE_SPEC format 2A_2A search spaces at aggregation 1
dci_decoding_procedure0(pdcch_vars,0,
dci_decoding_procedure0(pdcch_vars,0,mode,
subframe,
dci_alloc,
eNB_id,
......@@ -3524,7 +3531,7 @@ uint16_t dci_decoding_procedure(PHY_VARS_UE *ue,
return(dci_cnt);
// Now check UE_SPEC format 2 search spaces at aggregation 2
dci_decoding_procedure0(pdcch_vars,0,
dci_decoding_procedure0(pdcch_vars,0,mode,
subframe,
dci_alloc,
eNB_id,
......@@ -3555,7 +3562,7 @@ uint16_t dci_decoding_procedure(PHY_VARS_UE *ue,
return(dci_cnt);
// Now check UE_SPEC format 2_2A search spaces at aggregation 4
dci_decoding_procedure0(pdcch_vars,0,
dci_decoding_procedure0(pdcch_vars,0,mode,
subframe,
dci_alloc,
eNB_id,
......@@ -3587,7 +3594,7 @@ uint16_t dci_decoding_procedure(PHY_VARS_UE *ue,
//#ifdef ALL_AGGREGATION
// Now check UE_SPEC format 2_2A search spaces at aggregation 8
dci_decoding_procedure0(pdcch_vars,0,
dci_decoding_procedure0(pdcch_vars,0,mode,
subframe,
dci_alloc,
eNB_id,
......@@ -3613,7 +3620,7 @@ uint16_t dci_decoding_procedure(PHY_VARS_UE *ue,
} else if (tmode == 4) {
// Now check UE_SPEC format 2_2A search spaces at aggregation 1
dci_decoding_procedure0(pdcch_vars,0,
dci_decoding_procedure0(pdcch_vars,0,mode,
subframe,
dci_alloc,
eNB_id,
......@@ -3644,7 +3651,7 @@ uint16_t dci_decoding_procedure(PHY_VARS_UE *ue,
return(dci_cnt);
// Now check UE_SPEC format 2 search spaces at aggregation 2
dci_decoding_procedure0(pdcch_vars,0,
dci_decoding_procedure0(pdcch_vars,0,mode,
subframe,
dci_alloc,
eNB_id,
......@@ -3675,7 +3682,7 @@ uint16_t dci_decoding_procedure(PHY_VARS_UE *ue,
return(dci_cnt);
// Now check UE_SPEC format 2_2A search spaces at aggregation 4
dci_decoding_procedure0(pdcch_vars,0,
dci_decoding_procedure0(pdcch_vars,0,mode,
subframe,
dci_alloc,
eNB_id,
......@@ -3707,7 +3714,7 @@ uint16_t dci_decoding_procedure(PHY_VARS_UE *ue,
//#ifdef ALL_AGGREGATION
// Now check UE_SPEC format 2_2A search spaces at aggregation 8
dci_decoding_procedure0(pdcch_vars,0,
dci_decoding_procedure0(pdcch_vars,0,mode,
subframe,
dci_alloc,
eNB_id,
......@@ -3736,7 +3743,7 @@ uint16_t dci_decoding_procedure(PHY_VARS_UE *ue,
#ifdef DEBUG_DCI_DECODING
LOG_I(PHY," MU-MIMO check UE_SPEC format 1E_2A_M10PRB\n");
#endif
dci_decoding_procedure0(pdcch_vars,0,
dci_decoding_procedure0(pdcch_vars,0,mode,
subframe,
dci_alloc,
eNB_id,
......@@ -3768,7 +3775,7 @@ uint16_t dci_decoding_procedure(PHY_VARS_UE *ue,
return(dci_cnt);
// Now check UE_SPEC format 1E_2A_M10PRB search spaces aggregation 2
dci_decoding_procedure0(pdcch_vars,0,
dci_decoding_procedure0(pdcch_vars,0,mode,
subframe,
dci_alloc,
eNB_id,
......@@ -3799,7 +3806,7 @@ uint16_t dci_decoding_procedure(PHY_VARS_UE *ue,
return(dci_cnt);
// Now check UE_SPEC format 1E_2A_M10PRB search spaces aggregation 4
dci_decoding_procedure0(pdcch_vars,0,
dci_decoding_procedure0(pdcch_vars,0,mode,
subframe,
dci_alloc,
eNB_id,
......@@ -3832,7 +3839,7 @@ uint16_t dci_decoding_procedure(PHY_VARS_UE *ue,
//#ifdef ALL_AGGREGATION
// Now check UE_SPEC format 1E_2A_M10PRB search spaces at aggregation 8
dci_decoding_procedure0(pdcch_vars,0,
dci_decoding_procedure0(pdcch_vars,0,mode,
subframe,
dci_alloc,
eNB_id,
......
......@@ -1059,6 +1059,14 @@ typedef enum {
typedef enum {SF_DL, SF_UL, SF_S} lte_subframe_t;
#endif
typedef enum {
/// do not detect any DCIs in the current subframe
NO_DCI = 0x0,
/// detect only downlink DCIs in the current subframe
UL_DCI = 0x1,
/// detect only uplink DCIs in the current subframe
DL_DCI = 0x2,
/// detect both uplink and downlink DCIs in the current subframe
UL_DL_DCI = 0x3} dci_detect_mode_t;
#endif
......@@ -212,6 +212,13 @@ void prach_procedures(PHY_VARS_eNB *eNB);
lte_subframe_t subframe_select(LTE_DL_FRAME_PARMS *frame_parms,uint8_t subframe);
/*! \brief Function to compute which type of DCIs to detect in the given subframe
@param frame_parms Pointer to DL frame parameter descriptor
@param subframe Subframe index
@returns DCI detetion mode type (no DCIs, uplink DCIs, downlink DCIs, both uplink and downlink DCIs)
*/
dci_detect_mode_t dci_detect_mode_select(LTE_DL_FRAME_PARMS *frame_parms,uint8_t subframe);
/*! \brief Function to compute subframe type as a function of Frame type and TDD Configuration (implements Table 4.2.2 from 36.211, p.11 from version 8.6) and subframe index. Same as subframe_select, except that it uses the Mod_id and is provided as a service to the MAC scheduler.
@param Mod_id Index of eNB
@param CC_id Component Carrier Index
......
......@@ -518,6 +518,34 @@ lte_subframe_t subframe_select(LTE_DL_FRAME_PARMS *frame_parms,unsigned char sub
}
}
dci_detect_mode_t dci_detect_mode_select(LTE_DL_FRAME_PARMS *frame_parms,uint8_t subframe)
{
dci_detect_mode_t ret = 0;
static dci_detect_mode_t Table_8_2_3gpp_36_213[][10] = {
//subf0 , subf1 , subf2 , subf3 , subf4 , subf5 , subf6 , subf7 , subf8 , subf9
{UL_DL_DCI, UL_DL_DCI , NO_DCI , NO_DCI , NO_DCI , UL_DL_DCI , UL_DL_DCI , NO_DCI, NO_DCI , NO_DCI }, // tdd0
{DL_DCI , UL_DL_DCI , NO_DCI , NO_DCI , UL_DL_DCI , DL_DCI , UL_DL_DCI , NO_DCI, NO_DCI , UL_DL_DCI }, // tdd1
{DL_DCI , DL_DCI , NO_DCI , UL_DL_DCI , DL_DCI , DL_DCI , DL_DCI , NO_DCI, UL_DL_DCI , DL_DCI }, // tdd2
{UL_DL_DCI, DL_DCI , NO_DCI , NO_DCI , NO_DCI , DL_DCI , DL_DCI , DL_DCI, UL_DL_DCI , UL_DL_DCI }, // tdd3
{DL_DCI , DL_DCI , NO_DCI , NO_DCI , DL_DCI , DL_DCI , DL_DCI , DL_DCI, UL_DL_DCI , UL_DL_DCI }, // tdd4
{DL_DCI , DL_DCI , NO_DCI , DL_DCI , DL_DCI , DL_DCI , DL_DCI , DL_DCI, UL_DL_DCI , DL_DCI }, // tdd5
{UL_DL_DCI, UL_DL_DCI , NO_DCI , NO_DCI , NO_DCI , UL_DL_DCI , UL_DL_DCI , NO_DCI, NO_DCI , UL_DL_DCI }}; // tdd6
DevAssert(subframe>=0 && subframe<=9);
DevAssert((frame_parms->tdd_config)>=0 && (frame_parms->tdd_config)<=6);
if (frame_parms->frame_type == FDD) {
ret = UL_DL_DCI;
} else {
ret = Table_8_2_3gpp_36_213[frame_parms->tdd_config][subframe];
}
LOG_D(PHY, "subframe %d: detect UL_DCI=%d, detect DL_DCI=%d\n", subframe, (ret & UL_DCI)>0, (ret & DL_DCI)>0);
return ret;
}
lte_subframe_t get_subframe_direction(uint8_t Mod_id,uint8_t CC_id,uint8_t subframe)
{
......
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