Communication method, base station, and terminal device
Embodiments of the present invention provide a communication method, a base station, and a terminal device. The method includes: transmitting, by a base station, signals to a terminal device by using n port groups, where each of the n port groups includes at least two ports; and receiving, by the base station, s first linear combination coefficient groups transmitted by the terminal device, where each first linear combination coefficient group includes first linear combination coefficients of one of s port groups, at least one first linear combination coefficient group includes at least two non-zero coefficients, the s first linear combination coefficient groups are used to determine a first precoding matrix, the s port groups are included in the n port groups. This can improve channel feedback precision of the terminal device, and further help improve performance of transmission between the base station and the terminal device.
1. A communication method, comprising:
transmitting, by a base station, signals to a terminal device using n port groups, wherein each of the n port groups comprises at least two ports, and n is a positive integer greater than or equal to 2;
transmitting, by the base station, configuration information of each of then port groups to the terminal device; or receiving, by the base station, configuration information of each of the n port groups, from the terminal device;
wherein the configuration information indicates at least one of a frequency domain granularity of phases and a frequency domain granularity of amplitudes of first linear combination coefficients of each port group, and a quantity of quantized bits of the phases and a quantity of quantized bits of the amplitudes of the first linear combination coefficients of each port group; and
receiving, by the base station, s first linear combination coefficient groups from the terminal device, wherein each first linear combination coefficient group comprises first linear combination coefficients of one of s port groups, at least one first linear combination coefficient group comprises at least two non-zero coefficients, the s first linear combination coefficient groups are used to determine a first precoding matrix, the s port groups are comprised in the n port groups, s is a positive integer less than or equal to n, and s is a positive integer greater than or equal to 2.
2. The method according to claim 1 , wherein
the first precoding matrix is obtained based on the s first linear combination coefficient groups and s base vector groups, and each base vector group comprises base vectors of one of the s port groups.
3. The method according to claim 1 , wherein before the receiving, by the base station, s first linear combination coefficient groups from the terminal device, the method further comprises:
transmitting, by the base station, further configuration information to the terminal device; or
receiving, by the base station, further configuration information transmitted by the terminal device; wherein
the further configuration information indicates a quantity of ports selected by the terminal device from each port group.
4. A communication method, comprising:
receiving, by a terminal device, signals from a base station using n port groups, wherein each of the n port groups comprises at least two ports, and n is a positive integer greater than or equal to 2;
receiving, by the terminal device, configuration information of each of the n port groups from the base station; or transmitting, by the terminal device, configuration information of each of the n port groups, to the base station;
wherein the configuration information indicates at least one of a frequency domain granularity of phases and a frequency domain granularity of amplitudes of first linear combination coefficients of each port group, and a quantity of quantized bits of the phases and a quantity of quantized bits of the amplitudes of the first linear combination coefficients of each port group; and
transmitting, by the terminal device, s first linear combination coefficient groups to the base station, wherein each first linear combination coefficient group comprises first linear combination coefficients of one of s port groups, at least one first linear combination coefficient group comprises at least two non-zero coefficients, the s first linear combination coefficient groups are used to determine a first precoding matrix, the s port groups are comprised in the n port groups, s is a positive integer less than or equal to n, and s is a positive integer greater than or equal to 2.
5. The method according to claim 4 , wherein
the first precoding matrix is obtained based on the s first linear combination coefficient groups and s base vector groups, and each base vector group comprises base vectors of one of the s port groups.
6. The method according to claim 4 , wherein before the transmitting, by the terminal device, s first linear combination coefficient groups to the base station, the method further comprises:
receiving, by the terminal device, further configuration information from the base station; or
transmitting, by the terminal device, further configuration information to the base station; wherein
the further configuration information indicates a quantity of ports selected by the terminal device from each port group.
7. An apparatus, comprising:
one or more processors, and
a computer-readable storage medium storing program instructions; wherein, when executed by the one or more processors, the instructions cause the apparatus to:
transmit signals to a terminal device using n port groups, wherein each of the n port groups comprises at least two ports, and n is a positive integer greater than or equal to 2;
transmit, to the terminal device, configuration information of each of then port groups; or receive, from the terminal device, configuration information of each of the n port groups;
wherein the configuration information indicates at least one of a frequency domain granularity of phases and a frequency domain granularity of amplitudes of first linear combination coefficients of each port group, and a quantity of quantized bits of the phases and a quantity of quantized bits of the amplitudes of the first linear combination coefficients of each port group; and
receive s first linear combination coefficient groups from the terminal device, wherein each first linear combination coefficient group comprises first linear combination coefficients of one of s port groups, at least one first linear combination coefficient group comprises at least two non-zero coefficients, the s first linear combination coefficient groups are used to determine a first precoding matrix, the s port groups are comprised in the n port groups, s is a positive integer less than or equal to n, and s is a positive integer greater than or equal to 2.
8. The apparatus according to claim 7 , wherein:
the first precoding matrix is obtained based on the s first linear combination coefficient groups and s base vector groups, and each base vector group comprises base vectors of one of the s port groups.
9. The apparatus according to claim 7 , wherein before receiving s first linear combination coefficient groups from the terminal device, the instructions further cause the apparatus to:
transmit further configuration information to the terminal device; or
receive further configuration information transmitted by the terminal device; wherein
the further configuration information indicates a quantity of ports selected by the terminal device from each port group.
10. An apparatus, comprising:
one or more processors, and
a computer-readable storage medium storing program instructions; wherein, when executed by the one or more processors, the instructions cause the apparatus to:
receive signals from a base station using n port groups, wherein each of the n port groups comprises at least two ports, and n is a positive integer greater than or equal to 2;
receive, from the base station, configuration information of each of the n port groups; or transmit, to the base station, configuration information of each of the n port groups,
wherein the configuration information indicates at least one of a frequency domain granularity of phases and a frequency domain granularity of amplitudes of first linear combination coefficients of each port group, and a quantity of quantized bits of the phases and a quantity of quantized bits of the amplitudes of the first linear combination coefficients of each port group; and
transmit s first linear combination coefficient groups to the base station, wherein each first linear combination coefficient group comprises first linear combination coefficients of one of s port groups, at least one first linear combination coefficient group comprises at least two non-zero coefficients, the s first linear combination coefficient groups are used to determine a first precoding matrix, the s port groups are comprised in the n port groups, s is a positive integer less than or equal to n, and s is a positive integer greater than or equal to 2.
11. The apparatus according to claim 10 , wherein:
the first precoding matrix is obtained based on the s first linear combination coefficient groups and s base vector groups, and each base vector group comprises base vectors of one of the s port groups.
12. The apparatus according to claim 10 , wherein before transmitting s first linear combination coefficient groups to the base station, the instructions further cause the apparatus to:
receive further configuration information from the base station; or
transmit further configuration information to the base station; wherein
the further configuration information indicates a quantity of ports selected by the apparatus from each port group.