Method for configuring positioning reference signal in NR system, method for receiving positioning reference signal in NR system, and device
This disclosure provides a method for configuring a positioning reference signal in an NR system, a method for receiving a positioning reference signal in an NR system, and a device. The configuration method includes: transmitting first target configuration information, where the first target configuration information is used to configure a positioning reference signal PRS of a terminal device.
1. A method for receiving a positioning reference signal in a new radio (NR) system, operated by a terminal device, wherein the method comprises:
receiving target configuration information from a positioning server, wherein the target configuration information is used to configure one or more positioning reference signals (PRSs) in a PRS resource set;
receiving one or more PRS resource sets,
wherein the PRS resource set consists of at least one PRS resource, and the target configuration information comprises quasi co-location (QCL) information of the at least one PRS resource, and each of the at least one PRS resource has respective QCL information;
wherein the method further comprises:
receiving first target configuration information, wherein the first target configuration information is used to configure a PRS of the terminal device;
the first target configuration information comprises at least one of the following information:
cell ID information of the PRS;
positioning performance indicator information of the terminal device;
slot configuration information for configuring the PRS by the network device;
subcarrier spacing information for configuring the PRS by the network device;
bandwidth information configured for the terminal device by the network device;
cyclic prefix (CP) information of the PRS;
port information for configuring the PRS by the network device; and
power gain information of the PRS.
wherein PRSs received by the terminal device from a plurality of cells participating in positioning have a same subcarrier spacing and a same CP type;
wherein the method further comprises: receiving the PRS in N PRS consecutive downlink slots, wherein a first one of the N PRS consecutive downlink slots satisfies the following formula:
(
N
s
l
o
t
frame
,
μ
×
n
f
+
n
s
-
Δ
P
R
S
)
mod
T
P
R
S
=
0
,
wherein
N
slot
f
r
ame
,
μ
is a quantity of slots comprised in a radio frame corresponding to a numerology, n f is a radio frame index, n s is a slot index in a radio frame, Δ PRS is a slot offset of the PRS signal, and T PRS is a transmission period of the PRS signal.
2. The method according to claim 1 , wherein
the first target configuration information is configured by a network device for the terminal device through one cell in a plurality of cells, wherein the plurality of cells are selected and determined by the network device from cells within a predetermined distance from the terminal device, wherein
the plurality of cells are selected from the cells within the predetermined distance from the terminal device based on one or more of the following manners:
selecting the plurality of cells from the cells within the predetermined distance from the terminal device based on radio resource management RRM reports of the cells within the predetermined distance from the terminal device;
selecting the plurality of cells from the cells within the predetermined distance from the terminal device based on pre-estimation of a location of the terminal device; and
selecting the plurality of cells from the cells within the predetermined distance from the terminal device based on times of arrival (TOA) of PRSs transmitted in the cells within the predetermined distance from the terminal device.
3. The method according to claim 1 , wherein
the first target configuration information further comprises a generation parameter of the PRS, and after the receiving the first target configuration information, the method further comprises:
receiving the PRS, wherein the PRS is generated based on the generation parameter; wherein
the generation parameter is associated with at least one of the following parameters:
a slot index in a radio frame in which the PRS is located;
an index of an orthogonal frequency division multiplexing (OFDM) symbol in a slot in which the PRS is located;
a cyclic prefix (CP) type of the PRS;
cell ID information of the PRS;
an ID of the terminal device or an ID of a user group to which the terminal device belongs; and
an ID of a synchronization signal block (SSB).
4. The method according to claim 1 , wherein the method further comprises:
receiving second target configuration information, wherein the second target configuration information comprises a synchronization signal block (SSB) or channel state information reference signal (CSI-RS) that has a quasi co-location (QCL) relationship with the PRS, wherein
the SSB or the CSI-RS is used to provide the first target configuration information to the terminal device, and the first target configuration information that is provided comprises at least one of time information or beam information of the PRS.
5. The method according to claim 1 , wherein
the first target configuration information is received in at least one of the following manners:
receiving the first target configuration information based on higher-layer signaling;
receiving the first target configuration information based on media access control (MAC) layer signaling; or
receiving the first target configuration information based on downlink control information (DCI).
6. The method according to claim 1 , wherein the at least one PRS resource in the PRS set is mapped onto at least one resource element.
7. The method according to claim 1 , wherein
the target configuration information further comprises one or more of the following information:
a resource configuration identifier corresponding to the PRS in the PRS resource set;
period information and slot information of the PRS in the PRS resource set;
mapping information between the PRS in the PRS resource set and a resource of the network device;
power control information of the PRS in the PRS resource set;
a generation parameter for generating the PRS in the PRS resource set;
bandwidth part (BWP) information of the PRS in the PRS resource set.
8. The method according to claim 1 , wherein
the target configuration information is received in at least one of the following manners:
receiving the target configuration information based on higher-layer signaling;
receiving the target configuration information based on MAC-layer signaling;
receiving the target configuration information based on downlink control information (DCI).
receiving the target configuration information based on the positioning protocol (LPP) between the terminal device and a location server.
9. A terminal device, comprising a memory, a processor, and a wireless communication program stored in the memory and capable of running on the processor, wherein when the wireless communication program is executed by the processor, the terminal device implements a following step of:
receiving target configuration information from a positioning server, wherein the target configuration information is used to configure one or more positioning reference signals (PRSs) in a PRS set;
receiving one or more PRS resource sets,
wherein the PRS resource set consists of at least one PRS resource, and the target configuration information comprises quasi co-location (QCL) information of the at least one PRS resource, and each of the at least one PRS resource has respective QCL information;
wherein when the wireless communication program is executed by the processor, the terminal device further implements a following step of:
receiving first target configuration information, wherein the first target configuration information is used to configure a PRS of the terminal device;
the first target configuration information comprises at least one of the following information:
cell ID information of the PRS;
positioning performance indicator information of the terminal device;
slot configuration information for configuring the PRS by the network device;
subcarrier spacing information for configuring the PRS by the network device;
bandwidth information configured for the terminal device by the network device;
cyclic prefix (CP) information of the PRS;
port information for configuring the PRS by the network device; and
power gain information of the PRS,
wherein PRSs received by the terminal device from a plurality of cells participating in positioning have a same subcarrier spacing and a same CP type,
wherein when the wireless communication program is executed by the processor, the terminal device further implements a step of:
receiving the PRS in N PRS consecutive downlink slots, wherein a first one of the N PRS consecutive downlink slots satisfies the following formula:
(
N
s
l
o
t
frame
,
μ
×
n
f
+
n
s
-
Δ
P
R
S
)
mod
T
P
R
S
=
0
,
wherein
N
slot
f
r
ame
,
μ
is a quantity of slots comprised in a radio frame corresponding to a numerology, n f is a radio frame index, n s is a slot index in a radio frame, Δ PRS is a slot offset of the PRS signal, and T PRS is a transmission period of the PRS signal.
10. The terminal device according to claim 9 , wherein
the first target configuration information is configured by a network device for the terminal device through one cell in a plurality of cells, wherein the plurality of cells are selected and determined by the network device from cells within a predetermined distance from the terminal device, wherein
the plurality of cells are selected from the cells within the predetermined distance from the terminal device based on one or more of the following manners:
selecting the plurality of cells from the cells within the predetermined distance from the terminal device based on radio resource management RRM reports of the cells within the predetermined distance from the terminal device;
selecting the plurality of cells from the cells within the predetermined distance from the terminal device based on pre-estimation of a location of the terminal device; and
selecting the plurality of cells from the cells within the predetermined distance from the terminal device based on times of arrival (TOA) of PRSs transmitted in the cells within the predetermined distance from the terminal device.
11. The terminal device according to claim 9 , wherein
the first target configuration information further comprises a generation parameter of the PRS, and when the wireless communication program is executed by the processor, the terminal device further implements a step of: after the receiving the first target configuration information,
receiving the PRS, wherein the PRS is generated based on the generation parameter; wherein
the generation parameter is associated with at least one of the following parameters:
a slot index in a radio frame in which the PRS is located;
an index of an orthogonal frequency division multiplexing (OFDM) symbol in a slot in which the PRS is located;
a cyclic prefix (CP) type of the PRS;
cell ID information of the PRS;
an ID of the terminal device or an ID of a user group to which the terminal device belongs; and
an ID of a synchronization signal block SSB.
12. The terminal device according to claim 9 , wherein when the wireless communication program is executed by the processor, the terminal device further implements a following step of:
receiving second target configuration information, wherein the second target configuration information comprises a synchronization signal block (SSB) or channel state information reference signal (CSI-RS) that has a quasi co-location (QCL) relationship with the PRS, wherein
the SSB or the CSI-RS is used to provide the first target configuration information to the terminal device, and the first target configuration information that is provided comprises at least one of time information or beam information of the PRS.
13. The terminal device according to claim 9 , wherein
the first target configuration information is received in at least one of the following manners:
receiving the first target configuration information based on higher-layer signaling;
receiving the first target configuration information based on media access control (MAC)-layer signaling; or
receiving the first target configuration information based on downlink control information (DCI).
14. The terminal device according to claim 9 , wherein
the at least one PRS resource in the PRS set is mapped onto at least one resource element.
15. The terminal device according to claim 14 , wherein
the target configuration information further comprises one or more of the following information:
a resource configuration identifier corresponding to the PRS in the PRS resource set;
period information and slot information of the PRS in the PRS resource set;
mapping information between the PRS in the PRS resource set and a resource of the network device;
power control information of the PRS in the PRS resource set;
a generation parameter for generating the PRS in the PRS resource set;
bandwidth part (BWP) information of the PRS in the PRS resource set.
16. A computer-readable medium, wherein the computer-readable medium stores a wireless communication program, and when the wireless communication program is executed by a processor, the processor implements a following step of:
receiving target configuration information from a positioning server, wherein the target configuration information is used to configure one or more positioning reference signals (PRSs) in a PRS set;
receiving one or more PRS resource sets,
wherein the PRS resource set consists of at least one PRS resource, and the target configuration information comprises quasi co-location (QCL) information of the at least one PRS resource, and each of the at least one PRS resource has respective QCL information;
wherein when the wireless communication program is executed by the processor, the processor further implements a following step of:
receiving first target configuration information, wherein the first target configuration information is used to configure a PRS of the terminal device;
the first target configuration information comprises at least one of the following information:
cell ID information of the PRS;
positioning performance indicator information of the terminal device;
slot configuration information for configuring the PRS by the network device;
subcarrier spacing information for configuring the PRS by the network device;
bandwidth information configured for the terminal device by the network device;
cyclic prefix (CP) information of the PRS;
port information for configuring the PRS by the network device; and
power gain information of the PRS,
wherein PRSs received by the terminal device from a plurality of cells participating in positioning have a same subcarrier spacing and a same CP type,
wherein when the wireless communication program is executed by the processor, the terminal device further implements a step of:
receiving the PRS in N PRS consecutive downlink slots, wherein a first one of the N PRS consecutive downlink slots satisfies the following formula:
(
N
s
l
o
t
frame
,
μ
×
n
f
+
n
s
-
Δ
P
R
S
)
mod
T
P
R
S
=
0
,
wherein
N
slot
f
r
ame
,
μ
is a quantity of slots comprised in a radio frame corresponding to a numerology, n f is a radio frame index, n s is a slot index in a radio frame, Δ PRS is a slot offset of the PRS signal, and T PRS is a transmission period of the PRS signal.