Uplink control information
Embodiments of the present disclosure relate to methods, devices, apparatuses and computer readable storage media for Uplink Control Information (UCI) design. The method comprises determining, at a terminal device, a matrix comprising a set of non-zero linear combination coefficients for quantizing a channel between the terminal device and a network device, the matrix having spatial components and frequency components; shifting the frequency components of the matrix circularly, such that a target coefficient of the set of non-zero linear combination coefficients is located in a frequency component with a predetermined index of the frequency components in a shifted matrix; generating a first indication indicating the spatial component associated with the target coefficient in the matrix; and transmitting, to the network device, uplink control information comprising the first indication. In this way, a new solution for designing the UCI may reduce the overhead for reporting the parameters in the UCI.
1. A method, comprising:
determining, at a terminal device, a matrix comprising a set of non-zero linear combination coefficients for quantizing a channel between the terminal device and a network device, the matrix having spatial components and frequency components;
shifting the frequency components of the matrix circularly, such that a target coefficient of the set of non-zero linear combination coefficients is located in a frequency component with a predetermined index of the frequency components in a shifted matrix;
generating a first indication indicating the spatial component associated with the target coefficient in the matrix; and
transmitting, to the network device, uplink control information comprising the first indication.
2. The method of claim 1 , wherein determining the matrix comprises:
receiving downlink control information received from the network device;
obtaining a resource indication associate with the spatial components and the frequency components; and
determining the matrix based on the downlink control information and the resource indication.
3. The method of claim 1 , wherein shifting the frequency components comprises:
determining indices of the frequency components;
determining a reference index from the indices of the frequency components, the reference index indicating a frequency component associated with the target coefficient in the matrix;
shifting the frequency components based on the indices of the frequency components, the predetermined index and the reference index.
4. The method of claim 1 , wherein generating the first indication comprises:
determining, as the target coefficient, a maximum coefficient from the set of non-zero linear combination coefficients; and
generating the first indication based on the index of the spatial component associated with the target coefficient in the matrix.
5. The method of claim 1 , further comprising:
determining, based on the shifted matrix, a bitmap indicating locations of the non-zero linear combination coefficients in the shifted matrix; and
transmitting the uplink control information comprising the bitmap.
6. The method of claim 1 , further comprising:
generating, based on the predetermined index and the frequency components, a second indication indicating a frequency range associated with a subset of the frequency components;
transmitting the uplink control information comprising the second indication.
7. The method of claim 6 , wherein generating the second indication comprises:
determining, from the frequency components, a target frequency component associated with the predetermined index;
selecting, from the frequency components, the subset of the frequency components excluding the target frequency component;
determining indices of the subset of the frequency components after the shifting; and
generating the second indication based on the indices of the subset of the frequency component.
8. A method, comprising:
receiving, at a network device and from a terminal device, uplink control information comprising a first indication, the first indication indicating spatial components associated with a target coefficient in a matrix comprising a set of non-zero linear combination coefficients for quantizing a channel between the terminal device and the network device, the matrix having the spatial components and frequency components; and
determining state information of the channel based on the uplink control information, the uplink control information comprising a bitmap indicating locations of the non-zero linear combination coefficients in a shifted matrix obtained by shifting the frequency components of the matrix circularly.
9. The method of claim 8 , wherein determining the state information comprises:
determining the matrix based on the uplink control information; and
determining the state information based on the matrix.
10. The method of claim 8 , further comprising:
receiving uplink control information comprising the second indication indicating a frequency range associated with a subset of the frequency components.
11. A device, comprising:
at least one processor; and
at least one memory including computer program codes;
the at least one memory and the computer program codes are configured to, with the at least one processor, cause the device at least to:
determine, at a terminal device, a matrix comprising a set of non-zero linear combination coefficients for quantizing a channel between the terminal device and a network device, the matrix having spatial components and frequency components;
shift the frequency components of the matrix circularly, such that a target coefficient of the set of non-zero linear combination coefficients is located in a frequency component with a predetermined index of the frequency components in a shifted matrix;
generate a first indication indicating the spatial component associated with the target coefficient in the matrix; and
transmit, to the network device, uplink control information comprising the first indication.
12. The device of claim 11 , the device is caused to determine the matrix by:
receiving downlink control information received from the network device;
obtaining a resource indication associate with the spatial components and the frequency components; and
determining the matrix based on the downlink control information and the resource indication.
13. The device of claim 11 , the device is caused to shift the frequency components by:
determining indices of the frequency components;
determining a reference index from the indices of the frequency components, the reference index indicating a frequency component associated with the target coefficient in the matrix;
shifting the frequency components based on the indices of the frequency components, the predetermined index and the reference index.
14. The device of claim 11 , the device is caused to generate the first indication by:
determining, as the target coefficient, a maximum coefficient from the set of non-zero linear combination coefficients; and
generating the first indication based on the index of the spatial component associated with the target coefficient in the matrix.
15. The device of claim 11 , the device is further caused to:
determine, based on the shifted matrix, a bitmap indicating locations of the non-zero linear combination coefficients in the shifted matrix; and
transmit the uplink control information comprising the bitmap.
16. The device of claim 11 , the device is further caused to:
generate, based on the predetermined index and the frequency components, a second indication indicating a frequency range associated with a subset of the frequency components;
transmit the uplink control information comprising the second indication.
17. The device of claim 16 , the device is caused to generate the second indication by:
determining, from the frequency components, a target frequency component associated with the predetermined index;
selecting, from the frequency components, the subset of the frequency components excluding the target frequency component;
determining indices of the subset of the frequency components after shifting; and
generating the second indication based on the indices of the subset of the frequency component.
18. A device, comprising:
at least one processor; and
at least one memory including computer program codes;
the at least one memory and the computer program codes are configured to, with the at least one processor, cause the device at least to:
receive, at a network device and from a terminal device, uplink control information comprising a first indication, the first indication indicating spatial components associated with a target coefficient in a matrix comprising a set of non-zero linear combination coefficients for quantizing a channel between the terminal device and the network device, the matrix having the spatial components and frequency components; and
determine state information of the channel based on the uplink control information, the uplink control information comprising a bitmap indicating locations of the non-zero linear combination coefficients in a shifted matrix obtained by shifting the frequency components of the matrix circularly.
19. The device of claim 18 , the device is caused to determine the state information by:
determining the matrix based on the uplink control information; and
determining the state information based on the matrix.
20. The device of claim 18 , the device is further caused to:
receive uplink control information comprising the second indication indicating a frequency range associated with a subset of the frequency components.
21. A non-transitory computer readable medium comprising program instructions for causing an apparatus to perform at least the method of claim 1 .
22. A non-transitory computer readable medium comprising program instructions for causing an apparatus to perform at least the method of claim 8 .