Commit fce9f0b5 authored by Wilson's avatar Wilson

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

issue !156
parent 8f6746be
This diff is collapsed.
......@@ -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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