Channel state information measurement method, and apparatus
This application provides a channel state information measurement method, to enable a network device to dynamically adjust a quantity of transmit channels, thereby reducing energy consumption of the network device. The network device sends reference signal resource configuration information to a terminal device, where the reference signal resource configuration information indicates P antenna ports. The terminal device measures CSI based on one or more proper subsets of antenna ports in a universal set of the P antenna ports, and sends the CSI to the network device. The network device can dynamically adjust the quantity of transmit channels based on different dimensions of channel state information reported by the terminal device, thereby reducing energy consumption of the network device.
1 . A channel state information measurement method, comprising:
receiving, by a terminal device, reference signal resource configuration information, wherein the reference signal resource configuration information is useable to indicate a first reference signal resource, the first reference signal resource comprises P antenna ports, where P is a positive integer;
obtaining, by the terminal device, M pieces of channel state information (CSI) based on at least the first reference signal resource;
sending, by the terminal device, first information, wherein the first information comprises the M pieces of CSI, and the M pieces of CSI are in a one-to-one correspondence with M antenna port sets, an antenna port in any one of the M antenna port sets is in the P antenna ports, where M is a positive integer, and a quantity of antenna ports comprised in the any one of the M antenna port sets is less than P; and
receiving data, by the terminal device, over a number of channels, the number of channels are adjusted based on the M pieces of CSI.
2 . The method according to claim 1 , further comprising:
receiving first indication information, wherein the first indication information is useable to indicate N antenna port sets, the M antenna port sets are in the N antenna port sets, an antenna port comprised in any one of the N antenna port sets is in the P antenna ports, and N is an integer greater than or equal to M.
3 . The method according to claim 1 , further comprising:
receiving second indication information, wherein the second indication information is useable to indicate the M antenna port sets, or the second indication information is useable to indicate X antenna ports in the P antenna ports; and an antenna port in the M antenna port sets is in the X antenna ports, or the antenna port in the M antenna port sets is in the P antenna ports except the X antenna ports.
4 . The method according to claim 1 , wherein
the first information comprises M first bit fields, a K1 th first bit field in the M first bit fields is useable to indicate CSI of a first antenna port set in the M antenna port sets, a K2 th first bit field in the M first bit fields is useable to indicate CSI of a second antenna port set in the M antenna port sets, where K1 and K2 are positive integers less than or equal to M, K1 is less than K2, and
a first quantity of antenna ports comprised in the first antenna port set is greater than or equal to a second quantity of antenna ports comprised in the second antenna port set, or
a first channel quality of the first antenna port set is higher than or equal to a second channel quality of the second antenna port set.
5 . The method according to claim 1 , wherein
the first information comprises M second bit fields, and the M second bit fields respectively indicate indexes of the M antenna port sets.
6 . A channel state information measurement method, comprising:
sending, by a network device, reference signal resource configuration information, wherein the reference signal resource configuration information is useable to indicate a first reference signal resource, the first reference signal resource comprises P antenna ports, where P is a positive integer;
receiving, by the network device, first information, wherein the first information comprises M pieces of channel state information (CSI), the M pieces of CSI are obtained based on at least the first reference signal resource, and the M pieces of CSI are in a one-to-one correspondence with M antenna port sets, an antenna port comprised in any one of the M antenna port sets is in the P antenna ports, where M is a positive integer, and a quantity of antenna ports comprised in the any one of the M antenna port sets is less than P; and
sending data, by the network device, over a number of channels, the number of channels are adjusted based on the M pieces of CSI.
7 . The method according to claim 6 , further comprising:
sending first indication information, wherein the first indication information is useable to indicate N antenna port sets, the M antenna port sets are in the N antenna port sets, an antenna port comprised in any one of the N antenna port sets is in the P antenna ports, and N is a positive integer greater than or equal to M.
8 . The method according to claim 6 , further comprising:
sending second indication information, wherein the second indication information is useable to indicate the M antenna port sets, or the second indication information is useable to indicate X antenna ports in the P antenna ports; and an antenna port in the M antenna port sets is in the X antenna ports, or the antenna port in the M antenna port sets is in the P antenna ports except the X antenna ports.
9 . The method according to claim 6 , wherein
the first information comprises M first bit fields, a K1 th first bit field in the M first bit fields is useable to indicate CSI of a first antenna port set in the M antenna port sets, a K2 th first bit field in the M first bit fields is useable to indicate CSI of a second antenna port set in the M antenna port sets, where K1 and K2 are positive integers less than or equal to M, K1 is less than K2, and
a first quantity of antenna ports comprised in the first antenna port set is greater than or equal to a second quantity of antenna ports comprised in the second antenna port set, or
a first channel quality of the first antenna port set is higher than or equal to a second channel quality of the second antenna port set.
10 . The method according to claim 6 , wherein
the first information comprises M second bit fields, and the M second bit fields respectively indicate indexes of the M antenna port sets.
11 . A communication apparatus, comprising a processor, wherein the processor is configured to execute non-transitory instructions to thereby cause the communications apparatus to perform:
receiving reference signal resource configuration information, wherein the reference signal resource configuration information is useable to indicate a first reference signal resource, the first reference signal resource comprises P antenna ports, where P is a positive integer;
obtaining M pieces of channel state information (CSI) based on at least the first reference signal resource;
sending first information, wherein the first information comprises the M pieces of CSI, and the M pieces of CSI are in a one-to-one correspondence with M antenna port sets, an antenna port in any one of the M antenna port sets is in the P antenna ports, where M is a positive integer, and a quantity of antenna ports comprised in the any one of the M antenna port sets is less than P; and
receiving data over a number of channels, the number of channels are adjusted based on the M pieces of CSI.
12 . The communication apparatus according to claim 11 , wherein the processor is further configured to further execute the non-transitory instructions to thereby further cause the communications apparatus to perform:
receiving first indication information, wherein the first indication information is useable to indicate N antenna port sets, the M antenna port sets are in the N antenna port sets, an antenna port comprised in any one of the N antenna port sets is in the P antenna ports, and N is an integer greater than or equal to M.
13 . The communication apparatus according to claim 11 , wherein the processor is further configured to further execute the non-transitory instructions to thereby further cause the communications apparatus to perform:
receiving second indication information, wherein the second indication information is useable to indicate the M antenna port sets, or the second indication information is useable to indicate X antenna ports in the P antenna ports; and an antenna port in the M antenna port sets is in the X antenna ports, or the antenna port in the M antenna port sets is in the P antenna ports except the X antenna ports.
14 . The communication apparatus according to claim 11 , wherein
the first information comprises M first bit fields, a K1 th first bit field in the M first bit fields is useable to indicate CSI of a first antenna port set in the M antenna port sets, a K2 th first bit field in the M first bit fields is useable to indicate CSI of a second antenna port set in the M antenna port sets, where K1 and K2 are positive integers less than or equal to M, K1 is less than K2, and
a first quantity of antenna ports comprised in the first antenna port set is greater than or equal to a second quantity of antenna ports comprised in the second antenna port set, or
a first channel quality of the first antenna port set is higher than or equal to a second channel quality of the second antenna port set.
15 . The communication apparatus according to claim 11 , wherein
the first information comprises M second bit fields, and the M second bit fields respectively indicate indexes of the M antenna port sets.
16 . A communication apparatus, comprising a processor, wherein the processor is configured to execute non-transitory instructions to thereby cause the communications apparatus to perform:
sending reference signal resource configuration information, wherein the reference signal resource configuration information is useable to indicate a first reference signal resource, the first reference signal resource comprises P antenna ports, where P is a positive integer;
receiving first information, wherein the first information comprises M pieces of channel state information (CSI), the M pieces of CSI are obtained based on at least the first reference signal resource, and the M pieces of CSI are in a one-to-one correspondence with M antenna port sets, an antenna port comprised in any one of the M antenna port sets is in the P antenna ports, where M is a positive integer, and a quantity of antenna ports comprised in the any one of the M antenna port sets is less than P; and
sending data over a number of channels, the number of channels are adjusted based on the M pieces of CSI.
17 . The communication apparatus according to claim 16 , wherein the processor is further configured to further execute the non-transitory instructions to thereby further cause the communications apparatus to perform:
sending first indication information, wherein the first indication information is useable to indicate N antenna port sets, the M antenna port sets are in the N antenna port sets, an antenna port comprised in any one of the N antenna port sets is in the P antenna ports, and N is a positive integer greater than or equal to M.
18 . The communication apparatus according to claim 16 , wherein the processor is further configured to further execute the non-transitory instructions to thereby further cause the communications apparatus to perform:
sending second indication information, wherein the second indication information is useable to indicate the M antenna port sets, or the second indication information is useable to indicate X antenna ports in the P antenna ports; and an antenna port in the M antenna port sets is in the X antenna ports, or the antenna port in the M antenna port sets is in the P antenna ports except the X antenna ports.
19 . The communication apparatus according to claim 16 , wherein
the first information comprises M first bit fields, a K1 th first bit field in the M first bit fields is useable to indicate CSI of a first antenna port set in the M antenna port sets, a K2 th first bit field in the M first bit fields is useable to indicate CSI of a second antenna port set in the M antenna port sets, where K1 and K2 are positive integers less than or equal to M, K1 is less than K2, and
a first quantity of antenna ports comprised in the first antenna port set is greater than or equal to a second quantity of antenna ports comprised in the second antenna port set, or
a first channel quality of the first antenna port set is higher than or equal to a second channel quality of the second antenna port set.
20 . The communication apparatus according to claim 16 , wherein
the first information comprises M second bit fields, and the M second bit fields respectively indicate indexes of the M antenna port sets.