Channel state information reporting method and apparatus
地域：
Guangdong
摘要
This application provides a channel state information reporting method and apparatus. The method includes: A terminal device receives M pieces of downlink control information, where first downlink control information in the M pieces of downlink control information indicates a first channel state information configuration, the first channel state information configuration is associated with a first channel state information interference measurement CSI-IM resource group, and the first CSI-IM resource group includes N1 CSI-IM resources, where M and N1 are positive integers, and N1 is greater than 1; and the terminal device measures a target CSI-IM resource, and reports channel state information, where the target CSI-IM resource is determined by the terminal device from the N1 CSI-IM resources based on M, and a quantity of target CSI-IM resources is less than N1.
說明書
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This application is a continuation of International Application No. PCT/CN2018/099907, filed on Aug. 10, 2018, the disclosure of which is hereby incorporated by reference in its entirety.
This application relates to the communications field, and in particular, to a channel state information reporting method and apparatus in the communications field.
A terminal device moves from a center of a coverage area of a base station to an edge area of the base station. Because the edge area is within coverage areas of a plurality of base stations, other signal transmission causes strong interference to the terminal device, and consequently data transmission performance of the terminal device is poor. To improve the data transmission performance of the terminal device at the edge, a multi-station coordinated transmission (multi-TRP) mechanism is introduced in long term evolution (long term evolution, LTE) and new radio (new radio, NR). In this mechanism, the plurality of base stations may serve the terminal device, and interference originally caused by another base station may become a useful signal, thereby improving performance of the terminal device at the edge.
權(quán)利要求
What is claimed is:1. A channel state information reporting method, comprising:receiving, by a terminal device, M pieces of downlink control information, wherein first downlink control information in the M pieces of downlink control information indicates a first channel state information configuration associated with a first channel state information interference measurement (CSI-IM) resource group, and wherein the first CSI-IM resource group comprises N1 CSI-IM resources, wherein M and N1 are positive integers, and wherein N1 is greater than 1; and measuring, by the terminal device, at least one target CSI-IM resource, and reporting channel state information, wherein the at least one target CSI-IM resource is determined by the terminal device from the N1 CSI-IM resources based on a value of M, and wherein a quantity of the at least one target CSI-IM resources is less than N1. 2. The method according to claim 1 , wherein when M≥2, second downlink control information in the M pieces of downlink control information indicates a second channel state information configuration associated with a second CSI-IM resource group, wherein the second CSI-IM resource group comprises N2 CSI-IM resources, and wherein there is an association relationship between the first channel state information configuration and the second channel state information configuration, wherein N2 is a positive integer. 3. The method according to claim 2 , wherein the first channel state information configuration is the same as the second channel state information configuration; orwherein the first channel state information configuration and the second channel state information configuration are used for a same transmission mechanism set, and wherein the same transmission mechanism set comprises a multi-station joint transmission mechanism and a single-station transmission mechanism; or wherein the first channel state information configuration carries first indication information, or the first downlink control information carries the first indication information, and wherein the first indication information is to indicate that the first channel state information configuration is associated with the second channel state information configuration. 4. The method according to claim 1 , wherein the N1 CSI-IM resources comprise a first-type CSI-IM resource and a second-type CSI-IM resource, wherein the first-type CSI-IM resource is to measure interference information in a multi-station joint transmission mechanism, and wherein the second-type CSI-IM resource is to measure interference information in a single-station transmission mechanism. 5. The method according to claim 4 , wherein a jth CSI-IM resource in the N1 CSI-IM resources is predefined as the first-type CSI-IM resource or the second-type CSI-IM resource; orthe method further comprises: receiving, by the terminal device, third indication information, wherein the third indication information is to indicate that the jth CSI-IM resource in the N1 CSI-IM resources is the first-type CSI-IM resource or the second-type CSI-IM resource, whereinj∈{1, . . . ,N1}. 6. The method according to claim 4 , wherein when M=1, the at least one target CSI-IM resource is the second-type CSI-IM resource. 7. The method according to claim 4 , wherein when M≥2, the at least one target CSI-IM resource is the first-type CSI-IM resource; orwhen M≥2, the at least one target CSI-IM resource is the first-type CSI-IM resource or the second-type CSI-IM resource. 8. A channel state information reporting method, comprising:determining, by a network device, a first channel state information configuration associated with K channel state information reference signal (CSI-RS) resources and N1 channel state information interference measurement resources, and wherein at least one of the K CSI-RS resources is associated with 1 of the N1′ CSI-IM resources, wherein K and N1 are positive integers, and 1≤N1′≤N1; and sending, by the network device, the first channel state information configuration to a terminal device. 9. The method according to claim 8 , wherein the first channel state information configuration is further associated with N2 CSI-IM resources, wherein the N2 CSI-IM resources comprise a first-type CSI-IM resource and/or a second-type CSI-IM resource, wherein the first-type CSI-IM resource is to measure interference information in a multi-station joint transmission mechanism, and wherein the second-type CSI-IM resource is to measure interference information in a single-station transmission mechanism, wherein N2 is a positive integer. 10. The method according to claim 8 , wherein the first channel state information configuration comprises first indication information; orthe method further comprises: sending, by the network device, the first indication information, wherein the first indication information is to indicate that the first channel state information configuration is associated with a second channel state information configuration associated with N2 CSI-IM resources, wherein the N2 CSI-IM resources comprise a first-type CSI-IM resource and/or a second-type CSI-IM resource, wherein the first-type CSI-IM resource is to measure interference information in a multi-station joint transmission mechanism, and wherein the second-type CSI-IM resource is to measure interference information in a single-station transmission mechanism, wherein N2 is a positive integer. 11. The method according to claim 8 , wherein the method further comprises:sending, by the network device, second indication information to indicate that the first channel state configuration is used for a multi-station joint transmission mechanism or a single-station transmission mechanism. 12. The method according to claim 8 , wherein the N1 CSI-IM resources comprise a first-type CSI-IM resource and a second-type CSI-IM resource, wherein the first-type CSI-IM resource is to measure interference information in a multi-station joint transmission mechanism, and wherein the second-type CSI-IM resource is to measure the interference information in a single-station transmission mechanism. 13. The method according to claim 12 , wherein a jth CSI-IM resource in the N1 CSI-IM resources is predefined as the first-type CSI-IM resource or the second-type CSI-IM resource; orthe method further comprises: sending, by the network device, third indication information to indicate that the jth CR-IM resource in the N1 CSI-IM resources is the first-type CSI-IM resource or the second-type CSI-IM resource, whereinj∈{1, . . . ,N1}. 14. A channel state information reporting apparatus, comprising:a transceiver, configured to receive M pieces of downlink control information, wherein first downlink control information in the M pieces of downlink control information indicates a first channel state information configuration associated with a first channel state information interference measurement (CSI-IM) resource group, and wherein the first CSI-IM resource group comprises N1 CSI-IM resources, wherein M and N1 are positive integers, and N1 is greater than 1; and a processor, configured to: measure at least one target CSI-IM resource, and report channel state information by using the transceiver, wherein the at least one target CSI-IM resource is determined by a terminal device from the N1 CSI-IM resources based on a value of M, and a quantity of the at least one target CSI-IM resources is less than N1. 15. The apparatus according to claim 14 , wherein when M≥2, second downlink control information in the M pieces of downlink control information indicates a second channel state information configuration associated with a second CSI-IM resource group, wherein the second CSI-IM resource group comprises N2 CSI-IM resources, and wherein there is an association relationship between the first channel state information configuration and the second channel state information configuration, wherein N2 is a positive integer. 16. The apparatus according to claim 15 , wherein the first channel state information configuration is the same as the second channel state information configuration; orwherein the first channel state information configuration and the second channel state information configuration are used for a same transmission mechanism set, and wherein the same transmission mechanism set comprises a multi-station joint transmission mechanism and a single-station transmission mechanism; or wherein the first channel state information configuration carries first indication information, or the first downlink control information carries the first indication information, and wherein the first indication information is to indicate that the first channel state information configuration is associated with the second channel state information configuration. 17. The apparatus according to claim 15 , wherein the N1 CSI-IM resources comprise a first-type CSI-IM resource and a second-type CSI-IM resource, wherein the first-type CSI-IM resource is used to measure interference information in a multi-station joint transmission mechanism, and wherein the second-type CSI-IM resource is to measure interference information in a single-station transmission mechanism. 18. The apparatus according to claim 17 , wherein a jth CSI-IM resource in the N1 CSI-IM resources is predefined as the first-type CSI-IM resource or the second-type CSI-IM resource; orthe transceiver is further configured to: receive third indication information, wherein the third indication information is to indicate that the jth CSI-IM resource in the N1 CSI-IM resources is the first-type CSI-IM resource or the second-type CSI-IM resource, whereinj∈{1, . . . ,N1}. 19. The apparatus according to claim 17 , wherein when M=1, the at least one target CSI-IM resource is the second-type CSI-IM resource. 20. The apparatus according to claim 17 , wherein when M≥2, the at least one target CSI-IM resource is the first-type CSI-IM resource; orwhen M≥2, the at least one target CSI-IM resource is the first-type CSI-IM resource or the second-type CSI-IM resource.
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