# US 11,444,665 B2 · Information sending method, information receiving method, sending apparatus, and receiving apparatus

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- Number: US 11,444,665 B2
- Document ID: US11444665B2
- Status: Granted
- Kind: B2
- Application number: 16/930,037
- Filed: 2020-07-15
- Published: 2020-11-05
- Granted: 2022-09-13
- Earliest claimed: 2018-01-19
- Assignees: Huawei Technologies Co., Ltd.
- Applicants: Huawei Technologies Co., Ltd.
- Inventors: Liyan Su
- Web page: https://patentgrep.com/patent/US11444665B2

## CPC

- H04B 7/0456: Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
- H04B 7/063: {Parameters other than those covered in groups H04B7/0623 - H04B7/0634, e.g. channel matrix rank or transmit mode selection}
- H04B 7/0639: {Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection}
- H04B 7/0862: {receiver computing weights based on information from the transmitter}
- H04L 5/0091: {Signalling for the administration of the divided path, e.g. signalling of configuration information}
- H04W 72/21: in the uplink direction of a wireless link, i.e. towards the network
- H04L 5/0016: {Time-frequency-code}
- H04L 5/0023: {Time-frequency-space}
- H04B: TRANSMISSION
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

Embodiments of this application provide example information receiving methods and receiving apparatuses. One example information receiving method includes receiving, by a receiving apparatus, an index from a sending apparatus, wherein the index indicates precoding information used for a single codeword. The receiving apparatus can then determine, based on the index, the precoding information used for the single codeword.

## Claims

### Claim 1

An information receiving method, comprising:
receiving, by a receiving apparatus, an index from a sending apparatus, wherein the index indicates precoding information used for a single codeword;
receiving, by the receiving apparatus from the sending apparatus by using higher layer signaling, an indication of a table of a plurality of tables, wherein the table comprises a correspondence between the index and the precoding information; and
determining, by the receiving apparatus based on the index and the table, the precoding information used for the single codeword.

### Claim 2 (depends on 1)

The method according to claim 1, wherein:
the single codeword is a codeword sent by the sending apparatus to the receiving apparatus, and wherein there are two antenna ports of the sending apparatus; or
the single codeword is a codeword sent by the receiving apparatus to the sending apparatus, wherein there are two antenna ports of the receiving apparatus, and wherein a quantity of values of indexes is less than or equal to 4.

### Claim 3 (depends on 2)

The method according to claim 2, wherein:
the single codeword is the codeword sent by the sending apparatus to the receiving apparatus, and wherein there are two antenna ports of the sending apparatus;
at least one of the following is true:
precoding information indicated by all values of indexes comprises the following four types of precoding information;
precoding information indicated by all values of indexes comprises at least two types of the following four types of precoding information; or
precoding information indicated by all values of indexes comprises a first type and a fourth type of the following four types of precoding information;
the first type of precoding information indicates a 2-layer transmit diversity;
a second type of precoding information indicates that there is one transport layer for transmitting the single codeword, and that a precoding matrix is [1 1]T/√{square root over (2)};
a third type of precoding information indicates that there is one transport layer for transmitting the single codeword, and that a precoding matrix is [1 −1]T/√{square root over (2)}; and
the fourth type of precoding information indicates a precoding matrix reported by a latest precoding matrix indication PMI carried on a physical uplink shared channel (PUSCH).

### Claim 4 (depends on 2)

The method according to claim 2, wherein:
the single codeword is the codeword sent by the receiving apparatus to the sending apparatus, wherein there are two antenna ports of the receiving apparatus;
at least one of the following is true:
precoding information indicated by all values of indexes comprises the following four types of precoding information; or
precoding information indicated by all values of indexes comprises at least two types of the following four types of precoding information;
a first type of precoding information indicates a 2-layer transmit diversity;
a second type of precoding information indicates that there is one transport layer for transmitting the single codeword, and that a precoding matrix is [1 1]T/√{square root over (2)};
a third type of precoding information indicates that there is one transport layer for transmitting the single codeword, and that a precoding matrix is [1 0]T/√{square root over (2)}; and
a fourth type of precoding information indicates that there is one transport layer for transmitting the single codeword, and that a precoding matrix is [0 1]T/√{square root over (2)}.

### Claim 5 (depends on 1)

The method according to claim 1, wherein:
the single codeword is a codeword sent by the sending apparatus to the receiving apparatus, and wherein there are four antenna ports of the sending apparatus; or
the single codeword is a codeword sent by the receiving apparatus to the sending apparatus, wherein there are four antenna ports of the receiving apparatus, and wherein a quantity of values of indexes is less than or equal to 32.

### Claim 6 (depends on 5)

The method according to claim 5, wherein:
the single codeword is the codeword sent by the sending apparatus to the receiving apparatus, and wherein there are four antenna ports of the sending apparatus;
at least one of the following is true:
precoding information indicated by all values of indexes comprises the following 21 types of precoding information;
precoding information indicated by all values of indexes comprises at least 18 types of the following 21 types of precoding information; or
precoding information indicated by all values of indexes comprises a first type to an eighteenth type of the following 21 types of precoding information;
the first type of precoding information indicates a 4-layer transmit diversity;
an ith type of precoding information indicates that there is one transport layer for transmitting the single codeword, and that a precoding matrix is a precoding matrix represented by a transmit precoding matrix indication (TPMI), wherein the TPMI=i−2, and wherein i is an integer greater than or equal to 2 and less than or equal to 17;
the eighteenth type of precoding information indicates that there is one transport layer for transmitting the single codeword, and that a precoding matrix is a precoding matrix reported by a latest PMI carried on a PUSCH;
a nineteenth type of precoding information indicates that there are two transport layers for transmitting the single codeword, and that a precoding matrix is a precoding matrix reported by the latest PMI carried on the PUSCH;
a twentieth type of precoding information indicates that there are three transport layers for transmitting the single codeword, and that a precoding matrix is a precoding matrix reported by the latest PMI carried on the PUSCH; and
a twenty-first type of precoding information indicates that there are four transport layers for transmitting the single codeword, and that a precoding matrix is a precoding matrix reported by the latest PMI carried on the PUSCH.

### Claim 7 (depends on 5)

The method according to claim 5, wherein:
the single codeword is the codeword sent by the sending apparatus to the receiving apparatus, and wherein there are four antenna ports of the sending apparatus;
at least one of the following is true:
precoding information indicated by all values of indexes comprises the following 13 types of precoding information;
precoding information indicated by all values of indexes comprises at least 10 types of the following 13 types of precoding information; or
precoding information indicated by all values of indexes comprises a first type to a tenth type of the following 13 types of precoding information;
the first type of precoding information indicates a 4-layer transmit diversity;
an ith type of precoding information indicates that there is one transport layer for transmitting the single codeword, and that a precoding matrix is a precoding matrix represented by a TPMI, wherein the TPMI=a(i−2), wherein i is an integer greater than or equal to 2 and less than or equal to 9, and wherein a0, a1, . . . , a6, and a7 are seven different values in 0, 1, . . . , 14, and 15;
the tenth type of precoding information indicates that there is one transport layer for transmitting the single codeword, and that a precoding matrix is a precoding matrix reported by a latest PMI carried on a PUSCH;
an eleventh type of precoding information indicates that there are two transport layers for transmitting the single codeword, and that a precoding matrix is a precoding matrix reported by the latest PMI carried on the PUSCH;
a twelfth type of precoding information indicates that there are three transport layers for transmitting the single codeword, and that a precoding matrix is a precoding matrix reported by the latest PMI carried on the PUSCH; and
a thirteenth type of precoding information indicates that there are four transport layers for transmitting the single codeword, and that a precoding matrix is a precoding matrix reported by the latest PMI carried on the PUSCH.

### Claim 8 (depends on 5)

The method according to claim 5, wherein:
the single codeword is a codeword sent by the receiving apparatus to the sending apparatus, and wherein there are four antenna ports of the receiving apparatus; and
precoding information indicated by all values of indexes comprises the following 25 types of precoding information:
a first type of precoding information indicates a 4-layer transmit diversity; and
an ith type of precoding information indicates that there is one transport layer for transmitting the single codeword, and that a precoding matrix is a precoding matrix represented by a TPMI, wherein the TPMI=i−2, and wherein i is an integer greater than or equal to 2 and less than or equal to 25.

### Claim 9 (depends on 1)

The method according to claim 1, wherein:
the single codeword is a codeword sent by the sending apparatus to the receiving apparatus, and wherein there are two antenna ports of the sending apparatus; or
the single codeword is a codeword sent by the receiving apparatus to the sending apparatus, wherein there are two antenna ports of the receiving apparatus, and wherein there are two columns in a precoding matrix corresponding to precoding information indicated by an index corresponding to at least one of values of indexes.

### Claim 10 (depends on 9)

The method according to claim 9, wherein:
the single codeword is the codeword sent by the sending apparatus to the receiving apparatus, and wherein there are two antenna ports of the sending apparatus; and
all values of indexes comprise the following eight types of precoding information:
a first type of precoding information indicates a 2-layer transmit diversity;
a second type of precoding information indicates that there is one transport layer for transmitting the single codeword, and that a precoding matrix is [1 1]T/√{square root over (2)};
a third type of precoding information indicates that there is one transport layer for transmitting the single codeword, and that a precoding matrix is [1 −1]T/√{square root over (2)};
a fourth type of precoding information indicates that there is one transport layer for transmitting the single codeword, and that a precoding matrix is [1 j]T/√{square root over (2)};
a fifth type of precoding information indicates that there is one transport layer for transmitting the single codeword, and that a precoding matrix is [1 −j]T/√{square root over (2)};
a sixth type of precoding information indicates that there are two transport layers for transmitting the single codeword, and that a precoding matrix is
1
2
⁡
[
1
1
1
-
1
]
;
a seventh type of precoding information indicates that there are two transport layers for transmitting the single codeword, and that a precoding matrix is
1
2
⁡
[
1
1
j
-
j
]
;
and
an eighth type of precoding information indicates that a precoding matrix is a precoding matrix reported by a latest PMI carried on a PUSCH.

### Claim 11 (depends on 9)

The method according to claim 9, wherein:
the single codeword is the codeword sent by the receiving apparatus to the sending apparatus, and wherein there are two antenna ports of the receiving apparatus; and
all values of indexes comprise the following eight types of precoding information:
a first type of precoding information indicates a 2-layer transmit diversity;
an ith type of precoding information indicates that there is one transport layer for transmitting the single codeword, and that a precoding matrix is a precoding matrix represented by a TPMI, wherein the TPMI=i−2, and wherein i is an integer greater than 2 and less than or equal to 7; and
an eighth type of precoding information indicates that there are two transport layers for transmitting the single codeword, and that a precoding matrix is a precoding matrix represented by a TPMI, and wherein the TPMI=0.

### Claim 12 (depends on 1)

The method according to claim 1, wherein:
the single codeword is a codeword sent by the sending apparatus to the receiving apparatus, and wherein there are four antenna ports of the sending apparatus; or
the single codeword is a codeword sent by the receiving apparatus to the sending apparatus, wherein there are four antenna ports of the receiving apparatus, and wherein there are three or four columns in a precoding matrix corresponding to precoding information indicated by an index corresponding to at least one of values of indexes.

### Claim 13 (depends on 12)

The method according to claim 12, wherein:
the single codeword is the codeword sent by the sending apparatus to the receiving apparatus, and wherein there are four antenna ports of the sending apparatus; and
all values of indexes comprise the following 61 types of precoding information:
a first type of precoding information indicates a 4-layer transmit diversity;
an ith type of precoding information indicates that there is one transport layer for transmitting the single codeword, and that a precoding matrix is a precoding matrix represented by a TPMI, wherein the TPMI=i−2, and wherein i is an integer greater than or equal to 2 and less than or equal to 17;
an eighteenth type of precoding information indicates that there is one transport layer for transmitting the single codeword, and that a precoding matrix is a precoding matrix reported by a latest PMI carried on a PUSCH;
a jth type of precoding information indicates that there are two transport layers for transmitting the single codeword, and that a precoding matrix is a precoding matrix represented by a TPMI, wherein the TPMI=j−19, and wherein j is an integer greater than or equal to 19 and less than or equal to 34;
a thirty-fifth type of precoding information indicates that there are two transport layers for transmitting the single codeword, and that a precoding matrix is a precoding matrix reported by the latest PMI carried on the PUSCH;
a kth type of precoding information indicates that there are three transport layers for transmitting the single codeword, and that a precoding matrix is a precoding matrix represented by a TPMI, wherein the TPMI=k−36, and wherein k is an integer greater than or equal to 36 and less than or equal to 51;
a fifty-second type of precoding information indicates that there are three transport layers for transmitting the single codeword, and that a precoding matrix is a precoding matrix reported by the latest PMI carried on the PUSCH;
a gth type of precoding information indicates that there are four transport layers for transmitting the single codeword, and that a precoding matrix is a precoding matrix represented by a TPMI, wherein the TPMI=a(g−53), wherein g is an integer greater than or equal to 53 and less than or equal to 60, and wherein a0, a1, . . . , a6, and a7 are seven different values in 0, 1, . . . , 14, and 15; and
a sixty-first type of precoding information indicates that there are four transport layers for transmitting the single codeword, and that a precoding matrix is a precoding matrix reported by the latest PMI carried on the PUSCH.

### Claim 14 (depends on 12)

The method according to claim 12, wherein:
the single codeword is the codeword sent by the receiving apparatus to the sending apparatus, and wherein there are four antenna ports of the receiving apparatus; and
all values of indexes comprise the following 54 types of precoding information:
a first type of precoding information indicates a 4-layer transmit diversity;
an ith type of precoding information indicates that there is one transport layer for transmitting the single codeword, and that a precoding matrix is a precoding matrix represented by a TPMI, wherein the TPMI=i−2, and wherein i is an integer greater than or equal to 2 and less than or equal to 25;
a jth type of precoding information indicates that there are two transport layers for transmitting the single codeword, and that a precoding matrix is a precoding matrix represented by a TPMI, wherein the TPMI=j−26, and wherein j is an integer greater than or equal to 26 and less than or equal to 41;
a kth type of precoding information indicates that there are three transport layers for transmitting the single codeword, and that a precoding matrix is a precoding matrix represented by a TPMI, wherein the TPMI=k−42, and wherein k is an integer greater than or equal to 42 and less than or equal to 53; and
a fifty-fourth type of precoding information indicates that there are four transport layers for transmitting the single codeword, and that a precoding matrix is a precoding matrix represented by a TPMI, wherein the TPMI=0.

### Claim 15

A receiving apparatus, comprising:
at least one processor;
a transceiver; and
one or more memories coupled to the at least one processor and storing programming instructions for execution by the at least one processor to:
receive an index from a sending apparatus, wherein the index indicates precoding information used for a single codeword;
receive, by the receiving apparatus from the sending apparatus by using higher layer signaling, an indication of a table of a plurality of tables, wherein the table comprises a correspondence between the index and the precoding information; and
determine, based on the index and the table, the precoding information used for the single codeword.

### Claim 16 (depends on 15)

The receiving apparatus according to claim 15, wherein:
the single codeword is a codeword sent by the sending apparatus to the receiving apparatus, and wherein there are two antenna ports of the sending apparatus; or
the single codeword is a codeword sent by the receiving apparatus to the sending apparatus, wherein there are two antenna ports of the receiving apparatus, and wherein a quantity of values of indexes is less than or equal to 4.

### Claim 17 (depends on 16)

The receiving apparatus according to claim 16, wherein:
the single codeword is the codeword sent by the sending apparatus to the receiving apparatus, and wherein there are two antenna ports of the sending apparatus;
at least one of the following is true:
precoding information indicated by all values of indexes comprises the following four types of precoding information;
precoding information indicated by all values of indexes comprises at least two types of the following four types of precoding information; or
precoding information indicated by all values of indexes comprises a first type and a fourth type of the following four types of precoding information;
the first type of precoding information indicates a 2-layer transmit diversity;
a second type of precoding information indicates that there is one transport layer for transmitting the single codeword, and that a precoding matrix is [1 1]T/√{square root over (2)};
a third type of precoding information indicates that there is one transport layer for transmitting the single codeword, and that a precoding matrix is [1 −1]T/√{square root over (2)}; and
the fourth type of precoding information indicates a precoding matrix reported by a latest precoding matrix indication PMI carried on a physical uplink shared channel (PUSCH).

### Claim 18 (depends on 16)

The receiving apparatus according to claim 16, wherein:
the single codeword is the codeword sent by the receiving apparatus to the sending apparatus, wherein there are two antenna ports of the receiving apparatus;
at least one of the following is true:
precoding information indicated by all values of indexes comprises the following four types of precoding information; or
precoding information indicated by all values of indexes comprises at least two types of the following four types of precoding information;
a first type of precoding information indicates a 2-layer transmit diversity;
a second type of precoding information indicates that there is one transport layer for transmitting the single codeword, and that a precoding matrix is [1 1]T/√{square root over (2)};
a third type of precoding information indicates that there is one transport layer for transmitting the single codeword, and that a precoding matrix is [1 0]T/√{square root over (2)}; and
a fourth type of precoding information indicates that there is one transport layer for transmitting the single codeword, and that a precoding matrix is [0 1]T/√{square root over (2)}.

### Claim 19

A non-transitory, computer-readable storage medium storing one or more instructions, wherein when the one or more instructions are executed on a computer, the computer is enabled to perform operations comprising:
receiving, by a receiving apparatus, an index from a sending apparatus, wherein the index indicates precoding information used for a single codeword;
receiving, by the receiving apparatus from the sending apparatus by using higher layer signaling, an indication of a table of a plurality of tables, wherein the table comprises a correspondence between the index and the precoding information; and
determining, by the receiving apparatus based on the index and the table, the precoding information used for the single codeword.