Method and apparatus for transmitting CSI feedback information for multiple beams

Patent metadata

Field	Value
Publication number	US-10892809-B2
Application number	US-201816609598-A
Country	US
Kind code	B2
Filing date	Mar 2, 2018
Priority date	May 4, 2017
Publication date	Jan 12, 2021
Grant date	Jan 12, 2021

Abstract

Provided are a method and apparatus for transmitting CSI feedback information for multiple beams. The method includes: transmitting information for indicating a type of the CSI feedback information; transmitting a first type of CSI feedback information in the CSI feedback information for the multiple beams by using a first type of CSI feedback manner, wherein the first type of CSI feedback information includes at least first transmission rank information, first channel quality information and feedback information for a first beam in the multiple beams; and transmitting a second type of CSI feedback information in the CSI feedback information for the multiple beams by using a second type of CSI feedback manner, wherein the second type of CSI feedback information includes at least second transmission rank information, second channel quality information, and feedback information for beams other than the first beam in the multiple beams.

First claim

What is claimed is:

1. A method performed by a terminal, the method comprising:
transmitting information for indicating a type of channel state information feedback information;
transmitting a first type of channel state information feedback information in the channel state information feedback information for multiple beams by using a first type of channel state information feedback manner, wherein the first type of channel state information feedback information includes at least first transmission rank information, first channel quality information and feedback information for a first beam in the multiple beams;
transmitting a second type of channel state information feedback information in the channel state information feedback information for the multiple beams by using a second type of channel state information feedback manner, wherein the second type of channel state information feedback information includes at least second transmission rank information, second channel quality information and feedback information for beams other than the first beam in the multiple beams.

2. The method of claim 1 , wherein the second type of channel state information feedback information further includes feedback information for the first beam.

3. The method of claim 1 , wherein the transmitting information for indicating a type of the channel state information feedback information includes:
transmitting the information for indicating the type of the channel state information feedback information independently; or
transmitting the information for indicating the type of the channel state information feedback information by including it in the first type of channel state information feedback information; or
transmitting the information for indicating the type of the channel state information feedback information by including it in the second type of channel state information feedback information.

4. The method of claim 1 , further comprising:
transmitting information for indicating the number of beams in the second type of channel state information feedback information.

5. The method of claim 4 , wherein the transmitting the second type of channel state information feedback information includes:
transmitting the second transmission rank information, the second channel quality information, and the feedback information for the beams other than the first beam as a whole.

6. The method of claim 5 , further comprising:
obtaining the second channel quality information according to channel quality of the first beam and channel quality of the beams other than the first beam.

7. The method of claim 4 , wherein the transmitting the second type of channel state information feedback information includes:
dividing the second type of channel state information feedback information into a plurality of portions, wherein each portion includes feedback information for one or more beams and channel quality information corresponding to said each portion, the second transmission rank information is included in one of the plurality of portions, and the second channel quality information is channel quality information for the plurality of portions;
transmitting the plurality of portions respectively.

8. The method of claim 7 , further comprising:
obtaining the channel quality information corresponding to said each portion according to channel quality of one or more beams in said each portion; or
obtaining the channel quality information corresponding to said each portion according to the channel quality of the first beam and channel quality of one or more beams in said each portion.

9. The method of claim 7 , further comprising:
transmitting the information for indicating the number of beams in the second type of channel state information feedback information by including it in one of the plurality of portions.

10. A terminal comprising:
a processor; and
a storage medium having computer program instructions stored thereon, wherein the computer program instructions, when executed by the processor, perform processing of:
transmitting information for indicating a type of channel state information feedback information;
transmitting a first type of channel state information feedback information in the channel state information feedback information for multiple beams by using a first type of channel state information feedback manner, wherein the first type of channel state information feedback information includes at least first transmission rank information, first channel quality information and feedback information for a first beam in the multiple beams;
transmitting a second type of channel state information feedback information in the channel state information feedback information for the multiple beams by using a second type of channel state information feedback manner, wherein the second type of channel state information feedback information includes at least second transmission rank information, second channel quality information and feedback information for beams other than the first beam in the multiple beams.

11. The terminal of claim 10 , wherein the second type of channel state information feedback information further includes feedback information for the first beam.

12. The terminal of claim 10 , wherein,
the processor is further configured to transmit the information for indicating the type of the channel state information feedback information independently;
or transmit the information for indicating the type of the channel state information feedback information by including it in the first type of channel state information feedback information; or transmit the information for indicating the type of the channel state information feedback information by including it in the second type of channel state information feedback information.

13. The terminal of claim 10 , wherein,
the processor is further configured to transmit information for indicating the number of beams in the second type of channel state information feedback information.

14. The terminal of claim 13 , wherein,
the processor is further configured to transmit the second transmission rank information, the second channel quality information, and the feedback information for the beams other than the first beam as a whole.

15. The terminal of claim 14 , wherein:
the processor is configured to obtain the second channel quality information according to channel quality of the first beam and channel quality of the beams other than the first beam.

16. The terminal of claim 13 , wherein,
the processor is further configured to divide the second type of channel state information feedback information into a plurality of portions, wherein each portion includes feedback information for one or more beams and channel quality information corresponding to said each portion, the second transmission rank information is included in one of the plurality of portions, and the second channel quality information is channel quality information for the plurality of portions;
the processor is further configured to transmit the plurality of portions respectively.

17. The terminal of claim 16 , wherein,
the processor is further configured to obtain the channel quality information corresponding to said each portion according to channel quality of one or more beams in said each portion; or obtain the channel quality information corresponding to said each portion according to the channel quality of the first beam and channel quality of one or more beams in said each portion.

18. The terminal of claim 16 , wherein,
the

Assignees

• Ntt Docomo Inc

Inventors

• Li Huiling
• Na Chongning
• Kakishima Yuichi
• Nagata Satoshi

Classifications

• H04B7/06952

  Selecting one or more beams from a plurality of beams, e.g. beam training, management or sweeping · CPC title

• H04B7/0417 Primary

  Feedback systems · CPC title

• H04B7/0626 Primary

  Channel coefficients, e.g. channel state information [CSI] · CPC title