Reference signal sending method, reference signal receiving method, device, and system
Example reference signal sending methods and apparatus are described. In one example method, a terminal device detects whether a paging scheduling message exists in a PDCCH search space whose starting subframe is a subframe corresponding to a paging occasion (PO), and/or detects whether a wake-up signal (WUS) exists before a PO. A network device determines a time domain resource in first duration based on a quantity of paging occasions in a discontinuous reception period, where the time domain resource is a time domain resource in a time-frequency resource used to transmit a reference signal. The network device sends the reference signal to a terminal device on the time domain resource.
1. A reference signal sending method, wherein the sending method comprises:
determining, by an apparatus of a network device, a time domain resource in first duration based on a quantity of paging occasions in a discontinuous reception period, wherein the time domain resource is used to transmit a reference signal, and the first duration is a period of time in a first period associated with the discontinuous reception period; and
sending, by the apparatus, the reference signal to a terminal device on a time-frequency resource corresponding to the time domain resource in the first duration.
2. The sending method according to claim 1 , wherein the time domain resource includes at least one of a first time domain resource or a second time domain resource, and
wherein the first time domain resource includes P1 subframes before each paging occasion of one or more paging occasions in the first duration, wherein P1 is a positive integer, and wherein P1 relates to a number of paging occasions in the discontinuous reception period;
wherein the second time domain resource includes P2 subframes before a starting subframe of each wake-up signaling of one or more wakeup signaling in the first duration, and Q2 subframes after the starting subframe of the each wake-up signaling, wherein P2 is an integer which is equal to or larger than 0, wherein Q2 is an integer which is equal to or larger than 0, and wherein a sum of P2 and Q2 relates to the number of paging occasions in the discontinuous reception period.
3. The sending method according to claim 2 , wherein the one or more paging occasions in the first duration comprise N1 paging occasions in every M1 paging occasions of all paging occasions in the first duration, wherein M1 is an integer greater than or equal to 1, wherein N1 is an integer greater than or equal to 1, and wherein M1 is greater than or equal to N1.
4. The sending method according to claim 2 , wherein P1 is a specified value corresponding to the number of paging occasions in the discontinuous reception period.
5. The sending method according to claim 4 , wherein the discontinuous reception period is T, and wherein:
the number of paging occasions in the discontinuous reception period is equal to 4T, wherein P1 is equal to 1; or
the number of paging occasions in the discontinuous reception period is equal to 2T, wherein P1 is equal to 2.
6. The sending method according to claim 1 , wherein the time domain resource comprises at least one of a third time domain resource or a fourth time domain resource;
wherein the third time domain resource comprises at least one of:
subframes corresponding to N3 paging occasions in every M3 paging occasions of all paging occasions in the first duration,
X5 subframes before a subframe corresponding to each of the N3 paging occasions in every M3 paging occasions, or
Y5 subframes after the subframe corresponding to each of the N3 paging occasions in every M3 paging occasions,
wherein M3 is an integer greater than or equal to 1, wherein N3 is an integer greater than or equal to 1, wherein M3 is greater than or equal to N3, wherein X5 is an integer greater than or equal to 0, wherein Y5 is an integer greater than or equal to 0, and wherein M3 is related to the quantity of paging occasions in the discontinuous reception period; and
wherein the fourth time domain resource comprises at least one of:
starting subframes of N4 wake-up signals in every M4 wake-up signals of all wake-up signals in the first duration,
X6 subframes before a starting subframe of each of the N4 wake-up signals in every M4 wake-up signals, or
Y6 subframes after the starting subframe of each of the N4 wake-up signals in every M4 wake-up signals,
wherein M4 is an integer greater than or equal to 1, wherein N4 is an integer greater than or equal to 1, wherein M4 is greater than or equal to N4, wherein X6 is an integer greater than or equal to 0, wherein Y6 is an integer greater than or equal to 0, and wherein M4 is related to the quantity of paging occasions in the discontinuous reception period.
7. The sending method according to claim 6 , wherein that M3 is related to the quantity of paging occasions in the discontinuous reception period comprises:
M3 is a specified value corresponding to the quantity of paging occasions in the discontinuous reception period; or
M3 is determined by the apparatus based on the quantity of paging occasions in the discontinuous reception period, the discontinuous reception period, and a fifth specified value.
8. The sending method according to claim 7 , wherein the discontinuous reception period is T, and wherein:
a number of paging occasions in the discontinuous reception period is equal to T/2, wherein M3 is equal to 2; or
the number of paging occasions in the discontinuous reception period is equal to T/4, wherein M3 is equal to 1.
9. A reference signal receiving method, wherein the receiving method comprises:
determining, by an apparatus of a terminal device, a time domain resource in first duration based on a quantity of paging occasions in a discontinuous reception period, wherein the time domain resource is used to transmit a reference signal, and the first duration is a period of time in a first period associated with the discontinuous reception period; and
receiving, by the apparatus, the reference signal from a network device on a time-frequency resource corresponding to the time domain resource in the first duration.
10. The receiving method according to claim 9 , wherein the time domain resource includes at least one of a first time domain resource or a second time domain resource, and
wherein the first time domain resource includes P1 subframes before each paging occasion of one or more paging occasions in the first duration, wherein P1 is a positive integer, and wherein P1 relates to a number of paging occasions in the discontinuous reception period;
wherein the second time domain resource includes P2 subframes before a starting subframe of each wake-up signaling of one or more wakeup signaling in the first duration, and Q2 subframes after the starting subframe of the each wake-up signaling, wherein P2 is an integer which is equal to or larger than 0, wherein Q2 is an integer which is equal to or larger than 0, and wherein a sum of P2 and Q2 relates to the number of paging occasions in the discontinuous reception period.
11. The receiving method according to claim 10 , wherein the one or more paging occasions in the first duration comprise N1 paging occasions in every M1 paging occasions of all paging occasions in the first duration, wherein M1 is an integer greater than or equal to 1, wherein N1 is an integer greater than or equal to 1, and wherein M1 is greater than or equal to N1.
12. The receiving method according to claim 10 , wherein P1 is a specified value corresponding to the number of paging occasions in the discontinuous reception period.
13. The receiving method according to claim 12 , wherein the discontinuous reception period is T, and wherein:
the number of paging occasions in the discontinuous reception period is equal to 4T, wherein P1 is equal to 1; or
the number of paging occasions in the discontinuous reception period is equal to 2T, wherein P1 is equal to 2.
14. The receiving method according to claim 9 , wherein the time domain resource comprises at least one of a third time domain resource or a fourth time domain resource;
wherein the third time domain resource comprises at least one of:
subframes corresponding to N3 paging occasions in every M3 paging occasions of all paging occasions in the first duration,
X5 subframes before a subframe corresponding to each of the N3 paging occasions in every M3 paging occasions, or
Y5 subframes after the subframe corresponding to each of the N3 paging occasions in every M3 paging occasions,
wherein M3 is an integer greater than or equal to 1, wherein N3 is an integer greater than or equal to 1, wherein M3 is greater than or equal to N3, wherein X5 is an integer greater than or equal to 0, wherein Y5 is an integer greater than or equal to 0, and wherein M3 is related to the quantity of paging occasions in the discontinuous reception period; and
wherein the fourth time domain resource comprises at least one of:
starting subframes of N4 wake-up signals in every M4 wake-up signals of all wake-up signals in the first duration,
X6 subframes before a starting subframe of each of the N4 wake-up signals in every M4 wake-up signals, or
Y6 subframes after the starting subframe of each of the N4 wake-up signals in every M4 wake-up signals,
wherein M4 is an integer greater than or equal to 1, wherein N4 is an integer greater than or equal to 1, wherein M4 is greater than or equal to N4, wherein X6 is an integer greater than or equal to 0, wherein Y6 is an integer greater than or equal to 0, and wherein M4 is related to the quantity of paging occasions in the discontinuous reception period.
15. The receiving method according to claim 14 , wherein that M3 is related to the quantity of paging occasions in the discontinuous reception period comprises:
M3 is a specified value corresponding to the quantity of paging occasions in the discontinuous reception period; or
M3 is determined by the network device based on the quantity of paging occasions in the discontinuous reception period, the discontinuous reception period, and a fifth specified value.
16. The receiving method according to claim 15 , wherein the discontinuous reception period is T, and wherein
a number of paging occasions in the discontinuous reception period is equal to T/2, wherein M3 is equal to 2; or
the number of paging occasions in the discontinuous reception period is equal to T/4, wherein M3 is equal to 1.
17. An apparatus of a network device, wherein the apparatus comprises:
at least one processor;
one or more memories coupled to the at least one processor and storing programming instructions for execution by the at least one processor to:
determine a time domain resource in first duration based on a quantity of paging occasions in a discontinuous reception period, wherein the time domain resource is used to transmit a reference signal, and the first duration is a period of time in a first period associated with the discontinuous reception period; and
a transceiver, the transceiver configured to send the reference signal to a terminal device on a time-frequency resource corresponding to the time domain resource in the first duration.
18. The apparatus according to claim 17 , wherein the transceiver is further configured to send first indication information to the terminal device, wherein the first indication information is used to indicate that the network device supports determining the time domain resource in the first duration based on the quantity of paging occasions in the first duration.
19. An apparatus of a terminal device, wherein the apparatus comprises:
at least one processor;
one or more memories coupled to the at least one processor and storing programming instructions for execution by the at least one processor to:
determine a time domain resource in first duration based on a quantity of paging occasions in a discontinuous reception period, wherein the time domain resource is used to transmit a reference signal, and the first duration is a period of time in a first period associated with the discontinuous reception period; and
a transceiver, the transceiver configured to receive the reference signal from a network device on a time-frequency resource corresponding to the time domain resource in the first duration.
20. The apparatus according to claim 19 , wherein the transceiver is further configured to receive first indication information from the network device, wherein the first indication information is used to indicate that the network device supports determining the time domain resource in the first duration based on the quantity of paging occasions in the first duration.