Search

CN-116762305-B - Method for communication, terminal device, network device and computer readable medium

CN116762305BCN 116762305 BCN116762305 BCN 116762305BCN-116762305-B

Abstract

Embodiments of the present disclosure provide a scheme for CSI reporting. In a method for communication, a terminal device receives one or more configurations for at least one of a first CSI, a second CSI, or a third CSI in a Channel State (CSI) reporting setting. The one or more configurations in the CSI reporting setting include at least one of at least two rank restrictions or at least two codebook subset restrictions (CBSR). The terminal device transmits at least one of the first CSI, the second CSI, or the third CSI to a network device based on the one or more configurations.

Inventors

  • GAO YUKAI
  • WANG GANG

Assignees

  • 日本电气株式会社

Dates

Publication Date
20260508
Application Date
20210111

Claims (20)

  1. 1. A terminal device comprising a processor configured to cause the terminal device to: a configuration including a first rank indicator RI restriction is received, Wherein the first RI restriction indicates restrictions on RI for one or more resource pairs in a channel state information reference signal, CSI-RS, resource set and the first CSI-RS resource indicator, CRI, corresponds to a resource pair of the one or more resource pairs, and A channel state information, CSI, report is sent based on the configuration, wherein the CSI report comprises a first RI, a second RI, and the first CRI, the first RI and the second RI corresponding to the pair of resources of the one or more pairs of CSI-RS resources set.
  2. 2. The terminal device of claim 1, wherein the first RI restriction comprises one RI pair, wherein precoding matrix indicators, PMIs, and RI reports in the CSI report are not allowed to correspond to the RI pair.
  3. 3. The terminal device of claim 1, wherein The first RI and the second RI are allowed according to the first RI restriction.
  4. 4. The terminal device of claim 1, wherein The bit size of the first CRI is ceil (log 2 (M)), M being the number of CSI-RS resource pairs included in the CSI-RS resource set.
  5. 5. The terminal device of claim 1, wherein, The CSI report further includes one CRI or two CRIs; in case that one CRI is also included in the CSI report, the bit size of the one CRI is ceil (log 2 (N)); in the case that two CRIs are also included in the CSI report, the bit size of one of the two CRIs is ceil (log 2 (N1)), and the bit size of the other of the two CRIs is ceil (log 2 (N-N1)); Wherein N1 is the number of CSI-RS resources in the first subset of the CSI-RS resource set, N-N1 is the number of CSI-RS resources in the second subset of the CSI-RS resource set, and N is the number of CSI-RS resources in the CSI-RS resource set.
  6. 6. The terminal device of claim 1, wherein, The configuration also includes a second RI limit of bit size 8, The second RI restriction indicates a restriction on an RI applied to a third RI associated with one CSI-RS resource of the CSI-RS resource set.
  7. 7. A network device comprising a processor configured to cause the network device to: a configuration including a first rank indicator RI restriction is sent, Wherein the first RI restriction indicates restrictions on RI for one or more resource pairs in a channel state information reference signal, CSI-RS, resource set and the first CSI-RS resource indicator, CRI, corresponds to a resource pair of the one or more resource pairs, and A channel state information, CSI, report is received based on the configuration, wherein the CSI report comprises a first RI, a second RI, and the first CRI, the first RI and the second RI corresponding to the pair of resources of the one or more pairs of CSI-RS resources set.
  8. 8. The network device of claim 7, wherein the first RI restriction comprises one RI pair, wherein precoding matrix indicators, PMIs, and RI reports in the CSI report are not allowed to correspond to the RI pair.
  9. 9. The network device of claim 7, wherein The first RI and the second RI are allowed according to the first RI restriction.
  10. 10. The network device of claim 7, wherein The bit size of the first CRI is ceil (log 2 (M)), M being the number of CSI-RS resource pairs included in the CSI-RS resource set.
  11. 11. The network device of claim 7, wherein, The CSI report further includes one CRI or two CRIs; in case that one CRI is also included in the CSI report, the bit size of the one CRI is ceil (log 2 (N)); in the case that two CRIs are also included in the CSI report, the bit size of one of the two CRIs is ceil (log 2 (N1)), and the bit size of the other of the two CRIs is ceil (log 2 (N-N1)); Wherein N1 is the number of CSI-RS resources in the first subset of the CSI-RS resource set, N-N1 is the number of CSI-RS resources in the second subset of the CSI-RS resource set, and N is the number of CSI-RS resources in the CSI-RS resource set.
  12. 12. The network device of claim 7, wherein, The configuration also includes a second RI limit of bit size 8, The second RI restriction indicates a restriction on an RI applied to a third RI associated with one CSI-RS resource of the CSI-RS resource set.
  13. 13. A method performed by a terminal device, comprising: a configuration including a first rank indicator RI restriction is received, Wherein the first RI restriction indicates restrictions on RI for one or more resource pairs in a channel state information reference signal, CSI-RS, resource set and the first CSI-RS resource indicator, CRI, corresponds to a resource pair of the one or more resource pairs, and A channel state information, CSI, report is sent based on the configuration, wherein the CSI report comprises a first RI, a second RI, and the first CRI, the first RI and the second RI corresponding to the pair of resources of the one or more pairs of CSI-RS resources set.
  14. 14. The method of claim 13, wherein the first RI restriction comprises one RI pair, wherein precoding matrix indicators, PMIs, and RI reports in the CSI report are not allowed to correspond to the RI pair.
  15. 15. The method of claim 13, wherein The first RI and the second RI are allowed according to the first RI restriction.
  16. 16. The method of claim 13, wherein The bit size of the first CRI is ceil (log 2 (M)), M being the number of CSI-RS resource pairs included in the CSI-RS resource set.
  17. 17. The method of claim 13, wherein, The CSI report further includes one CRI or two CRIs; in case that one CRI is also included in the CSI report, the bit size of the one CRI is ceil (log 2 (N)); in the case that two CRIs are also included in the CSI report, the bit size of one of the two CRIs is ceil (log 2 (N1)), and the bit size of the other of the two CRIs is ceil (log 2 (N-N1)); Wherein N1 is the number of CSI-RS resources in the first subset of the CSI-RS resource set, N-N1 is the number of CSI-RS resources in the second subset of the CSI-RS resource set, and N is the number of CSI-RS resources in the CSI-RS resource set.
  18. 18. The method of claim 13, wherein, The configuration also includes a second RI limit of bit size 8, The second RI restriction indicates a restriction on an RI applied to a third RI associated with one CSI-RS resource of the CSI-RS resource set.
  19. 19. A method performed by a network device, comprising: a configuration including a first rank indicator RI restriction is sent, Wherein the first RI restriction indicates restrictions on RI for one or more resource pairs in a channel state information reference signal, CSI-RS, resource set and the first CSI-RS resource indicator, CRI, corresponds to a resource pair of the one or more resource pairs, and A channel state information, CSI, report is received based on the configuration, wherein the CSI report comprises a first RI, a second RI, and the first CRI, the first RI and the second RI corresponding to the pair of resources of the one or more pairs of CSI-RS resources set.
  20. 20. The method of claim 19, wherein the first RI restriction comprises one RI pair for which precoding matrix indicators, PMIs, and RI reports in the CSI report are not allowed to correspond.

Description

Method for communication, terminal device, network device and computer readable medium Technical Field Embodiments of the present disclosure relate generally to the field of communications, and more particularly, to schemes for Channel State Information (CSI) reporting. Background The 5G New Radio (NR) is a global standard for a unified and more capable 5G wireless air interface. 5G implements a new type of network designed to virtually connect everyone and everything together, including machines, objects, and devices. Multiple Input Multiple Output (MIMO) technology is a method for using multiple transmit and receive antennas to multiply the capacity of a radio link with multipath propagation. MIMO includes functional features that facilitate the utilization of a large number of antenna elements at a Base Station (BS) for below 6GHz and above 6 GHz. In third generation partnership project (3 GPP) release 17 (rel-17), further enhanced MIMO (FeMIMO) techniques are introduced to improve the management of beam forming and beam steering and reduce the associated overhead. Furthermore, in Rel-17, work Item Description (WID) on FeMIMO in NR has agreed to enhance CSI measurement and reporting for multiple transmission/reception points (multi-TRP). Regarding CSI measurements associated with CSI reporting settings for non-coherent joint transmission (NCJT), it has been recognized that non-zero power (NZP) channel state information reference signal (CSI-RS) resources for channel measurements should be associated with different TRP/Transmission Configuration Indication (TCI) states on a resource level (at least for multi-Downlink Control Indication (DCI) based and single DCI based schemes). However, there is no suitable scheme for CSI reporting, in particular with respect to multi-TRP transmission, and thus still cannot benefit therefrom. Thus, in NR systems, an improved scheme for CSI reporting is needed. Disclosure of Invention In general, embodiments of the present disclosure provide a scheme for CSI reporting. In a first aspect, a method for communication is provided. The method includes receiving, at a terminal device, one or more configurations for at least one of a first Channel State Information (CSI), a second CSI, or a third CSI in a first CSI reporting setting. The one or more configurations in the CSI reporting setting include at least one of at least two rank limitations or at least two codebook subset limitations (CBSR). The method also includes transmitting at least one of the first CSI, the second CSI, or the third CSI to a network device based on the one or more configurations. In a second aspect, a method for communication is provided. The method includes transmitting, at a network device, one or more configurations for at least one of a first CSI, a second CSI, or a third CSI in a Channel State Information (CSI) reporting setting. The one or more configurations in the CSI reporting setting include at least one of at least two rank limitations or at least two codebook subset limitations (CBSR). The method also includes receiving, at a network device, at least one of the first CSI, the second CSI, or the third CSI based on the one or more configurations. In a third aspect, a terminal device is provided. The terminal device comprises a processor configured to perform the method according to the first aspect. In a fourth aspect, a first network device is provided. The network device comprises a processor configured to perform the method according to the second aspect. In a fifth aspect, a computer readable medium having instructions stored thereon is provided. The instructions, when executed on at least one processor of a device, cause the device to perform the method according to the first aspect. In a sixth aspect, a computer readable medium having instructions stored thereon is provided. The instructions, when executed on at least one processor of a device, cause the device to perform the method according to the second aspect. It should be understood that the summary is not intended to identify key or essential features of the embodiments of the disclosure, nor is it intended to be used to limit the scope of the disclosure. Other features of the present disclosure will become apparent from the following description. Drawings The above and other aspects, features and advantages of various embodiments of the present disclosure will become more fully apparent from the following detailed description with reference to the accompanying drawings in which like reference numerals are used to designate the same or equivalent elements. The accompanying drawings, which are not necessarily drawn to scale, are illustrated to facilitate a better understanding of embodiments of the disclosure and wherein: FIG. 1 illustrates a schematic diagram of a communication environment in which some embodiments of the present disclosure may be implemented; FIG. 2 illustrates a flow chart of a communication method according to a