Reporting frequency and doppler parameters for coherent joint transmission (cjt) and mobility

Patent metadata

Field	Value
Publication number	US-2024097848-A1
Application number	US-202318521898-A
Country	US
Kind code	A1
Filing date	Nov 28, 2023
Priority date	Aug 10, 2022
Publication date	Mar 21, 2024
Grant date	—

Abstract

Disclosed are methods, systems, apparatuses, and computer readable media for generating a wireless device report for assisting a network node with frequency domain and time domain synchronization. In one aspect, a method of wireless communication is disclosed. The method includes receiving, at a wireless device, a report configuration associated with a reference signal (RS). The method further includes determining, at the wireless device, channel state information (CSI), wherein the CSI comprises at least one of an RS indicator, a rank indicator (RI), a precoding matrix indicator (PMI), Doppler information, or a channel quality index (CQI), according to the report configuration. The method includes reporting, at a wireless device, the channel state information (CSI).

First claim

1 . A method of wireless communication, comprising:
receiving, at a wireless device, a report configuration associated with a reference signal (RS); determining, at the wireless device, channel state information (CSI), wherein the CSI comprises at least one of an RS indicator, a rank indicator (RI), a precoding matrix indicator (PMI), Doppler information or a channel quality index (CQI), according to the report configuration; and reporting, at a wireless device, the channel state information (CSI).

2 . The method of wireless communication of claim 1 , wherein
the CSI comprises an indication of a relative offset between frequency domain (FD) bases, or a frequency parameter, or wherein the frequency parameter is at least one of layer-common, or RS resource specific.

3 . The method of wireless communication of claim 2 , wherein one or more of:
the frequency parameter includes at least one of: a frequency offset, or a phase shift vector, the relative offset or the frequency parameter is determined across a plurality of RS resources, the relative offset is an integer value or a decimal value, or the relative offset or the frequency parameter corresponds to a RS resource.

4 . The method of wireless communication of claim 2 , wherein the indication of the relative offset of FD-basis, or the frequency parameter is associated with one RS resource.

5 . The method of wireless communication of claim 2 ,
wherein the relative offset of FD-basis corresponds to a reference RS resource, and wherein the reference RS resource comprises a first RS resource with a specific identity, or a lowest identity from a set of RS resources.

6 . The method of wireless communication of claim 2 , wherein the FD-basis comprises a number of lists of FD bases, and wherein the relative offset corresponds to a difference between first FD-bases of different lists.

7 . The method of wireless communication of claim 1 , wherein the at least one of the RS indicator, the RI, the PMI or the CQI is determined under the assumption that a corresponding antenna port is compensated according to the frequency parameter.

8 . The method of wireless communication of claim 2 , wherein the relative offset or the frequency parameter is associated with a transmission unit, and wherein a number of transmission units or a resource in a transmission unit is configured by a RRC or MAC-CE command.

9 . The method of wireless communication of claim 2 , wherein a precoding matrix for a transmission unit is determined according to

e

j
⁢

2
⁢
π
⁢

t
i

⁢

n

R
,
x

N
R

,

a SD-basis or a FD-basis, where N R and n R,x denote a number of transmission units and a frequency parameter for an x-th RS resource, respectively, and wherein t i =0,1,2, . . . , N R −1.

10 . The method of wireless communication of claim 2 ,
wherein the frequency parameter is a differential value over a reference RS resource, and wherein for the reference RS resource, the frequency parameter is predefined, and a list of frequency parameters is reported in the CSI and corresponds to the rest of the one or more of RS resources by order.

11 . The method of wireless communication of claim 9 , wherein a precoding matrix is determined according to

e

j
⁢

2
⁢
π
⁢

t
i

⁢

n

R
,
K

N
R

⁢

w
K

,

wherein N R and n R,x denote a number of transmission units and a frequency parameter for a K-th RS resource, respectively, wherein t i =0,1,2, . . . , N R −1, and wherein K is a K-th RS resource.

12 . The method of wireless communication of claim 10 , wherein the reference RS resource is indicated in the CSI.

13 . A method of wireless communication, comprising:
transmitting, by a network device, a report configuration associated with a reference signal (RS); and receiving, by the network device, a channel state information (CSI), wherein the CSI comprises at least one of an RS indicator, a rank indicator (RI), a precoding matrix indicator (PMI), Doppler information or a channel quality index (CQI), according to the report configuration.

14 . The method of wireless communication of claim 13 ,
wherein the CSI comprises an indication of a relative offset between frequency domain (FD) bases, or a frequency parameter, or wherein the frequency parameter is at least one of layer-common, or RS resource specific.

15 . The method of wireless communication of claim 14 , wherein one or more of:
the frequency parameter includes at least one of: a frequency offset, or a phase shift vector, the relative offset or the frequency parameter is determined across a plurality of RS resources, the relative offset is an integer value or a decimal value, or the relative offset or the frequency parameter corresponds to a RS resource.

16 . The method of wireless communication of claim 14 , wherein the indication of the relative offset of FD-basis, or the frequency parameter is associated with one RS resource.

17 . A wireless communication apparatus, comprising a processor configured to implement a method, the processor configured to:
receive, at a wireless device, a report configuration associated with a reference signal (RS); determine, at the wireless device, channel state information (CSI), wherein the CSI comprises at least one of an RS indicator, a rank indicator (RI), a precoding matrix indicator (PMI), Doppler information or a channel quality index (CQI), according to the report configuration; and report, at a wireless device, the channel state information (CSI).

18 . The wireless communication apparatus of claim 17 ,
wherein the CSI comprises an indication of a relative offset between frequency domain (FD) bases, or a frequency parameter, or wherein the frequency parameter is at least one of layer-common, or

Assignees

• Zte Corp

Inventors

• Gao Bo
• Lu Zhaohua
• Mei Meng
• Zou Minqiang
• Yan Wenjun

Classifications

• H04B7/0478

  Special codebook structures directed to feedback optimisation · CPC title

• H04L5/0048 Primary

  Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091) · CPC title

• H04L5/0053

  Allocation of signalling, i.e. of overhead other than pilot signals · CPC title

• H04L5/0057

  Physical resource allocation for CQI · CPC title

• H04L5/0023

  Time-frequency-space · CPC title