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常顺宇
OpenXG-RAN
Commits
122e18d0
Commit
122e18d0
authored
4 years ago
by
cig
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Common function to check the frequency channel raster
parent
7e1ac1fa
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13 deletions
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-13
openair2/LAYER2/NR_MAC_COMMON/nr_mac_common.c
openair2/LAYER2/NR_MAC_COMMON/nr_mac_common.c
+13
-13
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openair2/LAYER2/NR_MAC_COMMON/nr_mac_common.c
View file @
122e18d0
...
...
@@ -1744,6 +1744,15 @@ uint16_t config_bandwidth(int mu, int nb_rb, int nr_band)
}
void
get_delta_arfcn
(
int
i
,
uint32_t
nrarfcn
,
uint64_t
N_OFFs
){
uint32_t
delta_arfcn
=
nrarfcn
-
N_OFFs
;
if
(
delta_arfcn
%
(
nr_bandtable
[
i
].
step_size
)
!=
0
)
AssertFatal
(
1
==
0
,
"nrarfcn %u is not on the channel raster for step size %lu"
,
nrarfcn
,
nr_bandtable
[
i
].
step_size
);
}
uint32_t
to_nrarfcn
(
int
nr_bandP
,
uint64_t
dl_CarrierFreq
,
uint8_t
scs_index
,
...
...
@@ -1751,7 +1760,7 @@ uint32_t to_nrarfcn(int nr_bandP,
{
uint64_t
dl_CarrierFreq_by_1k
=
dl_CarrierFreq
/
1000
;
int
bw_kHz
=
bw
/
1000
;
uint32_t
nrarfcn
,
delta_arfcn
;
uint32_t
nrarfcn
;
int
i
=
get_nr_table_idx
(
nr_bandP
,
scs_index
);
LOG_I
(
MAC
,
"Searching for nr band %d DL Carrier frequency %llu bw %u
\n
"
,
nr_bandP
,(
long
long
unsigned
int
)
dl_CarrierFreq
,
bw
);
...
...
@@ -1783,16 +1792,12 @@ uint32_t to_nrarfcn(int nr_bandP,
// This is equation before Table 5.4.2.1-1 in 38101-1-f30
// F_REF=F_REF_Offs + deltaF_Global(N_REF-NREF_REF_Offs)
nrarfcn
=
(((
dl_CarrierFreq_by_1k
-
F_REF_Offs_khz
)
/
deltaFglobal
)
+
N_REF_Offs
);
delta_arfcn
=
nrarfcn
-
nr_bandtable
[
i
].
N_OFFs_DL
;
if
(
delta_arfcn
%
(
nr_bandtable
[
i
].
step_size
)
!=
0
)
AssertFatal
(
1
==
0
,
"dl_CarrierFreq %lu corresponds to %u which is not on the raster for step size %lu"
,
dl_CarrierFreq
,
nrarfcn
,
nr_bandtable
[
i
].
step_size
);
get_delta_arfcn
(
i
,
nrarfcn
,
nr_bandtable
[
i
].
N_OFFs_DL
);
return
nrarfcn
;
}
// This function computes the
frequency from the NR-ARFCN according to 5.4.2.1.
of 3GPP TS 38.104
// This function computes the
RF reference frequency from the NR-ARFCN according to 5.4.2.1
of 3GPP TS 38.104
// this function applies to both DL and UL
uint64_t
from_nrarfcn
(
int
nr_bandP
,
uint8_t
scs_index
,
...
...
@@ -1801,8 +1806,6 @@ uint64_t from_nrarfcn(int nr_bandP,
int
deltaFglobal
=
5
;
uint32_t
N_REF_Offs
=
0
;
uint64_t
F_REF_Offs_khz
=
0
;
int
scs_khz
=
15
<<
scs_index
;
uint32_t
delta_arfcn
;
int32_t
delta_duplex
;
uint64_t
N_OFFs
,
frequency
,
freq_min
;
int
i
=
get_nr_table_idx
(
nr_bandP
,
scs_index
);
...
...
@@ -1841,10 +1844,7 @@ uint64_t from_nrarfcn(int nr_bandP,
LOG_D
(
MAC
,
"Frequency from NR-ARFCN for N_OFFs %lu, duplex spacing %d KHz, deltaFglobal %d KHz
\n
"
,
N_OFFs
,
delta_duplex
,
deltaFglobal
);
AssertFatal
(
nrarfcn
>=
N_OFFs
,
"nrarfcn %u < N_OFFs[%d] %llu
\n
"
,
nrarfcn
,
nr_bandtable
[
i
].
band
,
(
long
long
unsigned
int
)
N_OFFs
);
delta_arfcn
=
nrarfcn
-
N_OFFs
;
if
(
delta_arfcn
%
(
nr_bandtable
[
i
].
step_size
)
!=
0
)
AssertFatal
(
1
==
0
,
"nrarfcn %u is not on the raster for step size %lu"
,
nrarfcn
,
nr_bandtable
[
i
].
step_size
);
get_delta_arfcn
(
i
,
nrarfcn
,
N_OFFs
);
frequency
=
1000
*
(
F_REF_Offs_khz
+
(
nrarfcn
-
N_REF_Offs
)
*
deltaFglobal
);
...
...
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