Positioning signal processing method and apparatus
A positioning signal processing method includes receiving positioning reference signal (PRS) configuration information from a positioning device. A PRS is received as a PRS resource set. Each PRS resource set includes one or more PRSs. One access network device corresponds to one or more PRS resource sets. The positioning signal processing method further includes determining PRS time domain information based on the PRS configuration information. The time domain information includes a periodicity (P) of the PRS and a symbol length of the PRS in the P. The positioning signal processing method further includes receiving a plurality of PRSs based on the PRS time domain information.
1. A positioning signal processing method, wherein the method comprises:
receiving positioning reference signal (PRS) configuration information from a positioning device, wherein a PRS is received as a PRS resource set, each PRS resource set comprises one or more PRSs, and one access network device corresponds to one or more PRS resource sets;
determining PRS time domain information based on the PRS configuration information, wherein the time domain information comprises a periodicity (P) of the PRS and a symbol length of the PRS in the P;
receiving a plurality of PRSs based on the PRS time domain information;
wherein the determining the PRS time domain information based on the PRS configuration information comprises: determining a symbol length of a PRS in a first slot set, wherein the determining the symbol length of the PRS in the first slot set comprises:
determining a first symbol length of a PRS in each slot in the first slot set; and
determining the symbol length of the PRS in the first slot set based on the first symbol length;
configuring the symbol length of the PRS in the first slot set as the symbol length of the PRS in the P,
wherein the first slot set comprises a plurality of slots, and the plurality of slots are useable to transmit each PRS of the plurality of PRSs detected by the terminal device within a duration corresponding to the P.
2. The method according to claim 1 , wherein the determining PRS time domain information based on the PRS configuration information comprises:
P is a common sending periodicity of a plurality of PRS resource sets corresponding to a plurality of access network devices;
P is a common sending periodicity of first PRS resource sets corresponding to each access network device in the plurality of access network devices;
P is a sending periodicity of a first PRS resource set corresponding to a first access network device in the plurality of access network devices, wherein the sending periodicity of the first PRS resource set corresponding to the first access network device in the plurality of access network devices is a common divisor of sending periodicities of the first PRS resource sets corresponding to each access network device in the plurality of access network devices;
P is a greatest common divisor of a set of common divisors of the sending periodicities of the first PRS resource sets corresponding to each access network device in the plurality of access network devices;
P is a greatest common divisor of a set of common divisors of sending periodicities of a plurality of PRS resource sets corresponding to each access network device in the plurality of access network devices;
P is a least common multiple of a set of common multiples of the sending periodicities of the first PRS resource sets corresponding to each access network device in the plurality of access network devices; or
P is a least common multiple of a set of common multiples of the sending periodicities of the plurality of PRS resource sets corresponding to each access network device in the plurality of access network devices.
3. The method according to claim 1 , wherein the determining the first symbol length of the PRS in each slot in the first slot set comprises:
determining a start moment and an end moment of each slot in the first slot set; and
determining the first symbol length of the PRS in each slot in the first slot set based on the start moment and the end moment.
4. The method according to claim 3 , wherein the determining the first symbol length of the PRS in each slot in the first slot set based on the start moment and the end moment comprises:
determining the first symbol length of the PRS in each slot based on a first OFDM symbol determined at a first PRS subcarrier spacing corresponding to the start moment and a second OFDM symbol determined at a second PRS subcarrier spacing corresponding to the end moment.
5. The method according to claim 4 , wherein the first symbol length of the PRS satisfies a following formula:
K
s
=
1
2
μ
N
s
y
m
b
slot
(
ceil
(
2
μ
N
s
y
m
b
slot
T
s
e
n
d
)
-
floor
(
2
μ
N
s
y
m
b
slot
T
s
s
t
a
r
t
)
)
wherein s is a slot index in the first slot set, K s represents the first symbol length of the PRS in a slot having the slot index s, μ is a subcarrier spacing corresponding to the PRS, N symb slot is a quantity of symbols in one slot, T s start is a start moment in the slot having the slot index s, and T s end is an end moment in the slot having the slot index s.
6. The method according to claim 3 , wherein the determining the first symbol length of the PRS in each slot in the first slot set based on the start moment and the end moment comprises:
obtaining a time interval between the start moment and the end moment; and
determining the first symbol length of the PRS in each slot in the first slot set based on a symbol length corresponding to an OFDM symbol determined at a PRS subcarrier spacing corresponding to the time interval.
7. The method according to claim 6 , wherein the first symbol length of the PRS satisfies a following formula:
K
s
=
1
2
μ
N
s
y
m
b
slot
ceil
(
2
μ
N
s
y
m
b
slot
(
T
s
e
n
d
-
T
s
s
t
a
r
t
)
)
wherein s is a slot index in the first slot set, K s represents the first symbol length of the PRS in a slot having the slot index s, μ is a subcarrier spacing corresponding to the PRS, N symb slot is a quantity of symbols in one slot, T s start is a start moment in the slot having the slot index s, and T s end is an end moment in the slot having the slot index s.
8. The method according to claim 6 , wherein the time interval between the start moment and the end moment comprises a range in which each of PRS symbols sent by each access network device in the slot appears.
9. The method according to claim 8 , wherein the time interval between the start moment and the end moment is a minimum time interval of a set of time intervals.
10. The method according to claim 8 , wherein
the range in which each of the PRS symbols sent by each access network device in the slot appears is a union set of ranges in which each of the PRS symbols of each transmission reception point (TRP) appear, and
the range in which each of the PRS symbols sent by each access network device is determined based on an expected reference signal receiving time difference, an uncertain range of the expected reference signal receiving time difference, a symbol index occupied by the PRS, and a quantity of symbols sent by each access network device.
11. The method according to claim 1 , wherein the method further comprises: determining a symbol length of the PRS in the first slot, wherein the determining the symbol length of the PRS in the first slot set comprises:
determining slot lengths corresponding to slots in the first slot set; and
performing summation on the slot lengths corresponding to the slots in the first slot set to obtain the symbol length of the PRS in the first slot set.
12. The method according to claim 11 , wherein the symbol length of the PRS in the first slot set satisfies a following formula:
K
=
❘
"\[LeftBracketingBar]"
S
❘
"\[RightBracketingBar]"
2
μ
wherein K represents the symbol length of the PRS, |S| represents taking a quantity of elements in the set, and μ represents a subcarrier spacing.
13. A communication apparatus, comprising:
a transceiver;
a processor; and
a non-transitory computer-readable storage medium coupled to the processor, and configured to store non-transitory instructions, the processor being configured to execute the non-transitory instructions, to thereby cause the communication apparatus to:
receive positioning reference signal (PRS) configuration information from a positioning device, wherein a PRS is received as a PRS resource set, each PRS resource set comprises one or more PRSs, and one access network device corresponds to one or more PRS resource sets;
determine PRS time domain information based on the PRS configuration information, wherein the time domain information comprises a periodicity (P) of the PRS and a symbol length of the PRS in the P;
receive a plurality of PRSs based on the PRS time domain information;
wherein the processor configured to execute the non-transitory instructions, to thereby cause the communication apparatus to determine the PRS time domain information based on the PRS configuration information, comprises:
determine a symbol length of a PRS in a first slot set, wherein the determining the symbol length of the PRS in the first slot set comprises the communication apparatus to:
determine a first symbol length of a PRS in each slot in the first slot set; and
determine the symbol length of the PRS in the first slot set based on the first symbol length;
configure the symbol length of the PRS in the first slot set as the symbol length of the PRS in the P,
wherein the first slot set comprises a plurality of slots, and the plurality of slots are useable to transmit each PRS of the plurality of PRSs detected by the terminal device within a duration corresponding to the P.
14. The communication apparatus according to claim 13 , wherein the first symbol length of the PRS satisfies a following formula:
K
s
=
1
2
μ
N
s
y
m
b
slot
ceil
(
2
μ
N
s
y
m
b
slot
(
T
s
e
n
d
-
T
s
s
t
a
r
t
)
)
wherein s is a slot index in the first slot set, K s represents the first symbol length of the PRS in a slot having the slot index s, μ is a subcarrier spacing corresponding to the PRS, N symb slot is a quantity of symbols in one slot, T s start is a start moment in the slot having the slot index s, and T s end is an end moment in the slot having the slot index s.
15. The communication apparatus according to claim 13 , wherein
the processor is further configured to execute the non-transitory instructions, to further cause the communication apparatus to: determine a symbol length of the PRS in a first slot set, wherein the determining the symbol length of the PRS in the first slot set comprises the communication apparatus to:
determine slot lengths corresponding to slots in the first slot set; and
perform summation on the slot lengths corresponding to the slots in the first slot set to obtain the symbol length of the PRS in the first slot set.
16. The communication apparatus according to claim 15 , wherein the symbol length of the PRS in the first slot set satisfies a following formula:
K
=
❘
"\[LeftBracketingBar]"
S
❘
"\[RightBracketingBar]"
2
μ
wherein K represents the symbol length of the PRS, |S| represents taking a quantity of elements in the set, and μ represents a subcarrier spacing.
17. A communication system, wherein the system comprises a terminal, a positioning device, and an access network device, the terminal comprises a communication apparatus comprising:
a transceiver;
a processor; and
a non-transitory computer-readable storage medium coupled to the processor, and configured to store non-transitory instructions, the processor being configured to execute the non-transitory instructions, to thereby cause the communication apparatus to:
receive positioning reference signal (PRS) configuration information from a positioning device, wherein a PRS is received as a PRS resource set, each PRS resource set comprises one or more PRSs, and one access network device corresponds to one or more PRS resource sets;
determine PRS time domain information based on the PRS configuration information, wherein the time domain information comprises a periodicity (P) of the PRS and a symbol length of the PRS in the P;
receive a plurality of PRSs based on the PRS time domain information;
wherein the processor configured to execute the non-transitory instructions, to thereby cause the communication apparatus to determine the PRS time domain information based on the PRS configuration information, comprises:
determine a symbol length of a PRS in a first slot set, wherein the determining the symbol length of the PRS in the first slot set comprises the communication apparatus to:
determine a first symbol length of a PRS in each slot in the first slot set; and
determine the symbol length of the PRS in the first slot set based on the first symbol length;
configure the symbol length of the PRS in the first slot set as the symbol length of the PRS in the P,
wherein the first slot set comprises a plurality of slots, and the plurality of slots are useable to transmit each PRS of the plurality of PRSs detected by the terminal device within a duration corresponding to the P.