PRS-supporting sidelink power allocation method, and apparatus, storage medium, and terminal
View Patent ↗A Positioning Reference Signal (PRS) supporting sidelink power allocation method is provided. The method includes: determining base transmission power of a PRS based on P CMAX , P MAX,CBR and P PRS,SL (i); and allocating PRS transmission power for the PRS, wherein the PRS transmission power is larger than or equal to the base transmission power of the PRS; wherein P CMAX is a maximum transmission power of a terminal, P MAX,CBR is a maximum transmission power of the terminal under a given Channel Busy Ratio (CBR) P PRS,SL (i) is path loss compensation power of the PRS at an i-th positioning occasion of transmitting the PRS, and i indicates that the i-th positioning occasion is transmitted.
1 . A Positioning Reference Signal (PRS)-supporting sidelink power allocation method, comprising:
determining base transmission power of a PRS based on P CMAX , P MAX,CBR and P PRS,SL (i); and
allocating PRS transmission power for the PRS, wherein the PRS transmission power is larger than or equal to the base transmission power of the PRS;
wherein P CMAX is a maximum transmission power of a terminal, P MAX,CBR is a maximum transmission power of the terminal under a given Channel Busy Ratio (CBR), P PRS ,SL (i) is path loss compensation power of the PRS at an i-th positioning occasion of transmitting the PRS, and i indicates that the i-th positioning occasion is transmitted;
wherein the base transmission power of the PRS is determined based on a following formula,
P PRS ( i )=min( P CMAX ,P MAX,CBR ,P PRS,SL ( i )),
wherein P PRS (i) is the base transmission power of the PRS at the i-th positioning occasion of transmitting the PRS;
wherein P PRS,SL (i) is determined based on a following formula,
P
PRS
,
SL
(
i
)
=
P
O
,
PRS
+
1
0
log
1
0
(
2
μ
×
M
R
B
P
R
S
(
i
)
Combsize
)
+
α
P
R
S
×
P
L
P
R
S
,
or
P
PRS
,
SL
(
i
)
=
P
O
,
PRS
+
1
0
log
1
0
(
2
μ
×
M
R
B
P
R
S
(
i
)
C
o
m
b
s
i
z
e
)
,
wherein P PRS,SL (i) is the path loss compensation power of the PRS at the i-th positioning occasion of transmitting the PRS, P O,PRS is power of the PRS that the terminal expects to receive, μ is indication of a subcarrier bandwidth and a CP type of the PRS, M RB PRS (i) is a number of RBs of the PRS transmitted at the i-th positioning occasion of transmitting the PRS, Combsize is a frequency domain density of sidelink PRS, and α PRS is a PRS adjustment coefficient for adjusting the PRS transmission power, and PL PRS is path loss compensation power of the PRS.
2 . The method according to claim 1 , wherein following determining
the base transmission power of the PRS, the method further comprises:
determining base transmission power of a Physical Sidelink Shared Channel (PSSCH) and/or a Physical Sidelink Control Channel (PSCCH); and
allocating transmission power for the PSSCH and/or the PSCCH;
wherein the transmission power allocated for the PSSCH is larger than or equal to the base transmission power of the PSSCH, and the transmission power allocated for the PSCCH is larger than or equal to the base transmission power of the PSCCH.
3 . The method according to claim 2 , wherein said allocating transmission power for the PSSCH and the PSCCH comprises:
allocating transmission power for the PSSCH, and then allocating transmission power for the PSCCH; or
allocating transmission power for the PSCCH, and then allocating transmission power for the PSSCH.
4 . The method according to claim 3 , wherein based on that the transmission power is allocated first for the PSSCH and then for the PSCCH, the base transmission power of the PSSCH is determined based on a following formula,
P PSSCH ( i )=min(min( P CMAX ,P MAX,CBR )− P PRS ( i ),min( P PSSCH,D ( i ), P PSSCH,SL ( i ))),
wherein P PSSCH (i) is the base transmission power of the PSSCH at an i-th positioning occasion of transmitting the PSSCH, P PSSCH,D (i) is the transmission power of the PSSCH at the i-th positioning occasion of transmitting the PSSCH, and P PSSCH,SL (i) is the transmission power of the PSSCH at the i-th positioning occasion of transmitting the PSSCH; and
the base transmission power of the PSCCH is determined based on a following formula,
P
PSCCH
(
i
)
=
1
0
log
10
(
M
R
B
PSSC
H
(
i
)
M
R
B
P
S
S
C
H
(
i
)
)
+
P
P
S
S
C
H
(
i
)
,
or
P
PSCCH
(
i
)
=
min
(
min
(
P
CMAX
,
P
MAX
,
CBR
)
-
P
PSSCH
(
i
)
-
P
PRS
(
i
)
,
10
log
10
(
M
R
B
PSCCH
(
i
)
M
R
B
P
S
S
C
H
(
i
)
)
+
P
P
S
S
C
H
(
i
)
)
,
wherein P PSCCH (i) is the base transmission power of the PSCCH at an i-th positioning occasion of transmitting the PSCCH, M RB PSCCH (i) is a number of RBs of the PSCCH transmitted at the i-th positioning occasion of transmitting the PSCCH, M RB PSSCH (i) is a number of RBs of the PSSCH transmitted at the i-th positioning occasion of transmitting the PSSCH, and P PSSCH (i) is the base transmission power of the PSSCH at the i-th positioning occasion of transmitting the PSSCH.
5 . The method according to claim 3 , wherein based on that the transmission power is allocated first for the PSCCH and then for the PSSCH, the base transmission power of the PSCCH is determined based on a following formula,
P
PSCCH
(
i
)
=
1
0
log
10
(
M
R
B
PSSC
H
(
i
)
M
R
B
P
S
S
C
H
(
i
)
)
+
P
P
S
S
C
H
(
i
)
or
P
PSCCH
(
i
)
=
min
(
min
(
P
CMAX
,
P
MAX
,
CBR
)
-
P
PRS
(
i
)
,
1
0
log
1
0
(
M
R
B
PSSC
H
(
i
)
M
R
B
P
S
S
C
H
(
i
)
)
+
P
PSSCH
(
i
)
)
,
wherein P PSCCH (i) is the base transmission power of the PSCCH at an i-th positioning occasion of transmitting the PSCCH, M RB PSCCH (i) is a number of RBs of the PSCCH transmitted at the i-th positioning occasion of transmitting the PSCCH, M RB PSSCH (i) is a number of RBs of the PSSCH transmitted at an i-th positioning occasion of transmitting the PSSCH, and P PSSCH (i) is the base transmission power of the PSSCH at the i-th positioning occasion of transmitting the PSSCH; and
the base transmission power of the PSSCH is determined based on a following formula,
P PSSCH ( i )=min(min( P CMAX ,P MAX,CBR )− P PSSCH ( i )− P PRS ( i ),min( P PSSCH,D ( i ), P PSSCH,SL ( i )))
wherein P PSSCH (i) is the base transmission power of the PSSCH at an i-th positioning occasion of transmitting the PSSCH, P PSSCH,D (i) is the transmission power of the PSSCH at the i-th positioning occasion of transmitting the PSSCH, and P PSSCH,SL (i) is the transmission power of the PSSCH at the i-th positioning occasion of transmitting the PSSCH.
6 . The method according to claim 4 , wherein P PSSCH,D (i) and P PSSCH,SL (i) are determined based on following formulas,
P SSCH,D ( i )= P O,D +10 log 10 (2 μ ×M RB PSSCH ( i ))+α D ×PL D
P PSSCH,SL ( i )= P O,SL =10 log 10 (2 μ ×M RB PSSCH ( i ))+α SL ×PL SL ,
wherein P O,D is power of the PSSCH that a base station expects to receive, M RB PSSCH (i) is the number of RBs of the PSSCH transmitted at the i-th positioning occasion of transmitting the PSSCH, α D is a PSSCH adjustment coefficient for adjusting the transmission power of the PSSCH, and PL D is path loss compensation power of the PSSCH;
P O,SL is power of the PSSCH that the base station expects to receive, α SL is a PSSCH adjustment coefficient for adjusting the transmission power of the PSSCH, and PL SL is the path loss compensation power of the PSSCH.
7 . The method according to claim 1 , wherein prior to determining the base transmission power of the PRS, the method further comprises:
determining base transmission power of a PSSCH; and
allocating transmission power for the PSSCH;
wherein the transmission power allocated for the PSSCH is larger than or equal to the base transmission power of the PSSCH.
8 . The method according to claim 7 , wherein the base transmission power of the PRS is determined based on a following formula,
P PRS ( i )=min(min( P CMAX ,P MAX,CBR )− P PSSCH ( i ), P PRS,SL ( i ))
wherein P PRS (i) is the base transmission power of the PRS at the i-th positioning occasion of transmitting the PRS, P CMAX is the maximum transmission power of the terminal, P MAX,CBR is the maximum transmission power of the terminal under the given CBR, P PRS,SL (i) is the path loss compensation power of the PRS at the i-th positioning occasion of transmitting the PRS, P PSSCH (i) is base transmission power of the PSSCH at an i-th positioning occasion of transmitting the PSSCH, and i indicates that the i-th positioning occasion is transmitted.
9 . The method according to claim 8 , wherein P PRS,SL (i) is determined based on a following formula,
P
PRS
,
SL
(
i
)
=
P
O
,
PRS
+
1
0
log
1
0
(
2
μ
×
M
R
B
P
R
S
(
i
)
Combsize
)
+
α
P
R
S
×
P
L
P
R
S
or
P
PRS
,
SL
(
i
)
=
P
O
,
PRS
+
1
0
log
1
0
(
2
μ
×
M
R
B
P
R
S
(
i
)
C
o
m
b
s
i
z
e
)
,
wherein P PRS,SL (i) is the path loss compensation power of the PRS at the i-th positioning occasion of transmitting the PRS, P O,PRS is power of the PRS that the terminal expects to receive, μ is indication of a subcarrier bandwidth and a CP type of the PRS, M RB PRS (i) is a number of RBs of the PRS transmitted at the i-th positioning occasion of transmitting the PRS, Combsize is a frequency domain density of sidelink PRS, and α PRS is a PRS adjustment coefficient for adjusting the PRS transmission power, and PL PRS is path loss compensation power of the PRS.
10 . The method according to claim 8 , wherein the base transmission power of the PSSCH is determined based on a following formula,
P PSSCH ( i )=min( P CMAX ,P MAX,CBR ,min( P PSSCH,D ( i ), P PSSCH,SL ( i ))),
wherein P PSSCH (i) is the base transmission power of the PSSCH at an i-th positioning occasion of transmitting the PSSCH, P PSSCH,D (i) is the transmission power of the PSSCH at the i-th positioning occasion of transmitting the PSSCH, and P PSSCH,SL (i) is the transmission power of the PSSCH at the i-th positioning occasion of transmitting the PSSCH.
11 . The method according to claim 10 , wherein following determining the base transmission power of the PRS, the method further comprises:
determining base transmission power of a PSCCH; and
allocating transmission power for the PSCCH;
wherein the transmission power allocated for the PSCCH is larger than or equal to the base transmission power of the PSCCH.
12 . The method according to claim 11 , wherein the base transmission power of the PSCCH is determined based on a following formula,
P
PSCCH
(
i
)
=
1
0
log
10
(
M
R
B
PSSC
H
(
i
)
M
R
B
P
S
S
C
H
(
i
)
)
+
P
P
S
S
C
H
(
i
)
or
P
PSCCH
(
i
)
=
min
(
min
(
P
CMAX
,
P
MAX
,
CBR
)
-
P
PSSCH
(
i
)
-
P
PRS
(
i
)
,
10
log
10
(
M
R
B
PSCCH
(
i
)
M
R
B
P
S
S
C
H
(
i
)
)
+
P
P
S
S
C
H
(
i
)
)
,
wherein P PSCCH (i) is the base transmission power of the PSCCH at an i-th positioning occasion of transmitting the PSCCH, M RB PSCCH (i) is a number of RBs of the PSCCH transmitted at the i-th positioning occasion of transmitting the PSCCH, M RB PSCCH (i) is a number of RBs of the PSSCH transmitted at the i-th positioning occasion of transmitting the PSSCH, and P PSSCH (i) is the base transmission power of the PSSCH at the i-th positioning occasion of transmitting the PSSCH.
13 . A non-transitory storage medium storing one or more programs, the one or more programs comprising computer instructions, which, when executed by a processor, cause the processor to:
determine base transmission power of a Positioning Reference Signal (PRS) based on P CMAX , P MAX,CBR and P PRS,SL (i); and
allocate PRS transmission power for the PRS, wherein the PRS transmission power is larger than or equal to the base transmission power of the PRS;
wherein P CMAX is a maximum transmission power of a terminal, P MAX,CBR is a maximum transmission power of the terminal under a given Channel Busy Ratio (CBR), P PRS,SL (i) is path loss compensation power of the PRS at an i-th positioning occasion of transmitting the PRS, and i indicates that the i-th positioning occasion is transmitted;
wherein the base transmission power of the PRS is determined based on a following formula,
P PRS ( i )=min( P CMAX ,P MAX,CBR ,P PRS,SL ( i )),
wherein P PRS (i) is the base transmission power of the PRS at the i-th positioning occasion of transmitting the PRS;
wherein P PRS,SL (i) is determined based on a following formula,
P
PRS
,
SL
(
i
)
=
P
O
,
PRS
+
1
0
log
1
0
(
2
μ
×
M
R
B
P
R
S
(
i
)
Combsize
)
+
α
P
R
S
×
P
L
P
R
S
,
or
P
PRS
,
SL
(
i
)
=
P
O
,
PRS
+
1
0
log
1
0
(
2
μ
×
M
R
B
P
R
S
(
i
)
C
o
m
b
s
i
z
e
)
,
wherein P PRS,SL (i) is the path loss compensation power of the PRS at the i-th positioning occasion of transmitting the PRS, P O,PRS is power of the PRS that the terminal expects to receive, μ is indication of a subcarrier bandwidth and a CP type of the PRS, M RB PRS (i) is a number of RBs of the PRS transmitted at the i-th positioning occasion of transmitting the PRS, Combsize is a frequency domain density of sidelink PRS, and α PRS is a PRS adjustment coefficient for adjusting the PRS transmission power, and PL PRS is path loss compensation power of the PRS.
14 . A terminal comprising a memory and a processor, wherein the memory stores one or more programs, the one or more programs comprising computer instructions, which, when executed by the processor, cause the processor to:
determine base transmission power of a Positioning Reference Signal (PRS) based on P CMAX , P MAX,CBR and P PRS,SL (i); and
allocate PRS transmission power for the PRS, wherein the PRS transmission power is larger than or equal to the base transmission power of the PRS;
wherein P CMAX is a maximum transmission power of a terminal, P MAX,CBR is a maximum transmission power of the terminal under a given Channel Busy Ratio (CBR), P PRS,SL (i) is path loss compensation power of the PRS at an i-th positioning occasion of transmitting the PRS, and i indicates that the i-th positioning occasion is transmitted;
wherein the base transmission power of the PRS is determined based on a following formula,
P PRS ( i )=min( P CMAX ,P MAX,CBR ,P PRS,SL ( i )),
wherein P PRS (i) is the base transmission power of the PRS at the i-th positioning occasion of transmitting the PRS:
wherein P PRS,SL (i) is determined based on a following formula,
P
PRS
,
SL
(
i
)
=
P
O
,
PRS
+
10
log
10
(
2
μ
×
M
RB
PRS
(
i
)
Combsize
)
+
α
PRS
×
PL
PRS
,
or
P
PRS
,
SL
(
i
)
=
P
O
,
PRS
+
10
log
10
(
2
μ
×
M
RB
PRS
(
i
)
Combsize
)
,
wherein P PRS,SL (i) is the path loss compensation power of the PRS at the i-th positioning occasion of transmitting the PRS, P O,PRS is power of the PRS that the terminal expects to receive, μ is indication of a subcarrier bandwidth and a CP type of the PRS, M RB PRS (i) is a number of RBs of the PRS transmitted at the i-th positioning occasion of transmitting the PRS, Combsize is a frequency domain density of sidelink PRS, and α PRS is a PRS adjustment coefficient for adjusting the PRS transmission power, and PL PRS is path loss compensation power of the PRS.
15 . The terminal according to claim 14 , wherein the processor is further caused to:
determine base transmission power of a Physical Sidelink Shared Channel (PSSCH) and/or a Physical Sidelink Control Channel (PSCCH); and
allocate transmission power for the PSSCH and/or the PSCCH;
wherein the transmission power allocated for the PSSCH is larger than or equal to the base transmission power of the PSSCH, and the transmission power allocated for the PSCCH is larger than or equal to the base transmission power of the PSCCH.
16 . The terminal according to claim 15 , wherein the processor is further caused to:
allocate transmission power for the PSSCH, and then allocate transmission power for the PSCCH; or
allocate transmission power for the PSCCH, and then allocate transmission power for the PSSCH.