Method and apparatus for determining reference signal sequence, computer program product, and computer readable storage medium
This application provides a method for determining a reference signal sequence, a terminal device, and a network device. The method includes: receiving, by a terminal device, first indication information sent by a network device; determining, by the terminal device, a target resource based on the first indication information; determining, by the terminal device, a reference signal sequence based on parameters of a first bandwidth and parameters of a second bandwidth; and sending or receiving, by the terminal device, the reference signal sequence on the target resource. Based on the method for determining a reference signal sequence provided in this application, the reference signal sequence can be determined based on the parameters of the first bandwidth and the parameters of the second bandwidth.
1. A method, comprising:
receiving first indication information from a network device, the first indication information indicating a time-frequency resource;
receiving second indication information from the network device, the second indication information indicating a frequency domain start position of a maximum system bandwidth;
determining a reference signal sequence based on an offset, wherein the offset is between a frequency domain start position of a bandwith part and the frequency domain start position of the maximum system bandwidth; and
sending or receiving a reference signal corresponding to the reference signal sequence using the time-frequency resource; and
wherein the reference signal sequence meets a k,l (p) =w p (l′)·r(3·l′·N RB max,DL +3·n PRB +m′+offset1) or a k,l (p) =w p (l′)·r(3·l′·N RB max,DL +3·(n PRB +offset2)+m′), wherein a k,l (p) is the reference signal, p is an antenna port number corresponding to the reference signal a k,l (p) , k is a frequency domain subcarrier position to which the reference signal a k,l (p) is mapped, l is a time domain symbol position to which the reference signal a k,l (p) is mapped, w p (l′) is an orthogonal cover code (OCC) corresponding to the antenna port number corresponding to the reference signal a k,l (p) , r() is the reference signal sequence, N RB max is a maximum number of resource blocks, n PRB is an index of a physical resource block, l and m are intermediate variables, and offset 1 or offset 2 is the offset between the frequency domain start position of the bandwidth part and the frequency domain start position of the maximum system bandwidth.
2. The method according to claim 1 , further comprising:
receiving third indication information from the network device, the third indication information indicating the frequency domain start position of the bandwidth part.
3. The method according to claim 1 , wherein the bandwidth part and the time-frequency resource occupy a same resource in frequency domain.
4. The method according to claim 1 , wherein determining the reference signal sequence comprises:
determining the reference signal sequence based on a subcarrier spacing and the offset between the frequency domain start position of the bandwidth part and the frequency domain start position of the maximum system bandwidth.
5. An apparatus, comprising:
a non-transitory storage medium including executable instructions; and
a processor;
wherein the executable instructions, when executed by the processor, cause the apparatus to:
receive first indication information from a network device, the first indication information indicating a time-frequency resource;
receive second indication information from the network device, the second indication information indicating a frequency domain start position of a maximum system bandwidth;
determine a reference signal sequence based on an offset, wherein the offset is between a frequency domain start position of a bandwidth part and the frequency domain start position of the maximum system bandwidth; and
send or receive a reference signal corresponding to the reference signal sequence using the time-frequency resource; and
wherein the reference signal sequence meets a k,l (p) =w p (l′)·r(3·l′·N RB max,DL +3·n PRB +m′+offset1) or a k,l (p) =w p (l′)·r(3·l′·N RB max,DL +3·(n PRB +offset2)+m′), wherein a k,l (p) is the reference signal, p is an antenna port number corresponding to the reference signal a k,l (p) , k is a frequency domain subcarrier position to which the reference signal a k,l (p) is mapped, l is a time domain symbol position to which the reference signal a k,l (p) is mapped, w p (l′) is an orthogonal cover code (OCC) corresponding to the antenna port number corresponding to the reference signal a k,l (p) , r() is the reference signal sequence, N RB max is a maximum number of resource blocks, n PRB is an index of a physical resource block, l and m are intermediate variables, and offset 1 or offset 2 is the offset between the frequency domain start position of the bandwidth part and the frequency domain start position of the maximum system bandwidth.
6. The apparatus according to claim 5 , wherein the executable instructions, when executed by the processor, further cause the apparatus to:
receive third indication information from the network device, the third indication information indicating the frequency domain start position of the bandwidth part.
7. The apparatus according to claim 5 , wherein the executable instructions, when executed by the processor, cause the apparatus to:
determine the reference signal sequence based on a subcarrier spacing and the offset between the frequency domain start position of the bandwidth part and the frequency domain start position of the maximum system bandwidth.
8. A method, comprising:
sending first indication information to a terminal, the first indication information indicating a time-frequency resource;
sending second indication information to the terminal, the second indication information indicating a frequency domain start position of a maximum system bandwidth;
determining a reference signal sequence based on an offset, wherein the offset is between a frequency domain start position of a bandwidth part and the frequency domain start position of the maximum system bandwidth; and
sending or receiving a reference signal corresponding to the reference signal sequence using the time-frequency resource; and
wherein the reference signal sequence meets a k,l (p) =w p (l′)·r(3·l′·N RB max,DL +3·n PRB +m′+offset1) or a k,l (p) =w p (l′)·r(3·l′·N RB max,DL +3·(n PRB +offset2)+m′), wherein a k,l (p) is the reference signal, p is an antenna port number corresponding to the reference signal a k,l (p) , k is a frequency domain subcarrier position to which the reference signal a k,l (p) is mapped, l is a time domain symbol position to which the reference signal a k,l (p) is mapped, w p (l′) is an orthogonal cover code (OCC) corresponding to the antenna port number corresponding to the reference signal a k,l (p) , r() is the reference signal sequence, N RB max is a maximum number of resource blocks, n PRB is an index of a physical resource block, l and m are intermediate variables, and offset 1 or offset 2 is the offset between the frequency domain start position of the bandwidth part and the frequency domain start position of the maximum system bandwidth.
9. The method according to claim 8 , further comprising:
sending third indication information to the terminal, the third indication information indicating the frequency domain start position of the bandwidth part.
10. The method according to claim 8 , wherein the bandwidth part and the time-frequency resource occupy a same resource in frequency domain.
11. The method according to claim 8 , wherein determining the reference signal sequence comprises:
determining the reference signal sequence based on a subcarrier spacing and the offset between the frequency domain start position of the bandwidth part and the frequency domain start position of the maximum system bandwidth.
12. An apparatus, comprising:
a non-transitory storage medium including executable instructions; and
a processor;
wherein the executable instructions, when executed by the processor, cause the apparatus to:
send first indication information to a terminal, the first indication information indicating a time-frequency resource;
send second indication information to the terminal, the second indication information indicating a frequency domain start position of a maximum system bandwidth;
determine a reference signal sequence based on an offset, wherein the offset is between a frequency domain start position of a bandwidth part and the frequency domain start position of the maximum system bandwidth; and
send or receive a reference signal corresponding to the reference signal sequence using the time-frequency resource; and
wherein the reference signal sequence meets a k,l (p) =w p (l′)·r(3·l′·N RB max,DL +3·n PRB +m′+offset1) or a k,l (p) =w p (l′)·r(3·l′·N RB max,DL +3·(n PRB +offset2)+m′), wherein a k,l (p) is the reference signal, p is an antenna port number corresponding to the reference signal a k,l (p) , k is a frequency domain subcarrier position to which the reference signal a k,l (p) is mapped, l is a time domain symbol position to which the reference signal a k,l (p) is mapped, w p (l′) is an orthogonal cover code (OCC) corresponding to the antenna port number corresponding to the reference signal a k,l (p) , r() is the reference signal sequence, N RB max is a maximum number of resource blocks, n PRB is an index of a physical resource block, l and m are intermediate variables, and offset 1 or offset 2 is the offset between the frequency domain start position of the bandwidth part and the frequency domain start position of the maximum system bandwidth.
13. The apparatus according to claim 12 , wherein the executable instructions, when executed by the processor, further cause the apparatus to:
send third indication information to the terminal, the third indication information indicating the frequency domain start position of the bandwidth part.
14. The apparatus according to claim 12 , wherein the bandwidth part and the time-frequency resource occupy a same resource in frequency domain.
15. The apparatus according to claim 12 , wherein the executable instructions, when executed by the processor, cause the apparatus to:
determine the reference signal sequence based on a subcarrier spacing and the offset between the frequency domain start position of the bandwidth part and the frequency domain start position of the maximum system bandwidth.