# US 12,004,208 B2 · Method, terminal, and network device for downlink data transmission based on scheduling of physical downlink shared channels (PDSCHs)

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- Number: US 12,004,208 B2
- Document ID: US12004208B2
- Status: Granted
- Kind: B2
- Application number: 17/840,179
- Filed: 2022-06-14
- Published: 2022-09-29
- Granted: 2024-06-04
- Earliest claimed: 2019-02-15
- Assignees: Guangdong Oppo Mobile Telecommunications Corp., Ltd.
- Applicants: Guangdong Oppo Mobile Telecommunications Corp., Ltd.
- Inventors: Wenhong Chen; Zhihua Shi
- Web page: https://patentgrep.com/patent/US12004208B2

## CPC

- H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals}
- H04W 72/54: based on quality criteria
- H04B 7/022: Site diversity; Macro-diversity (using two or more spaced independent antennas H04B7/04)
- H04B 7/0408: using two or more beams, i.e. beam diversity
- H04J 14/0213: {Groups of channels or wave bands arrangements}
- H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT}
- H04L 5/0023: {Time-frequency-space}
- H04L 5/0044: {Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH}
- H04L 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal}
- H04L 5/02: Channels characterised by the type of signal
- H04W 28/0263: {involving mapping traffic to individual bearers or channels, e.g. traffic flow template [TFT]}
- H04W 48/12: using downlink control channel
- H04W 72/0446: Resources in time domain, e.g. slots or frames
- H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal
- H04W 74/002: {Transmission of channel access control information}
- H04W 74/0866: {using a dedicated channel for access}
- H04L 5/0055: {Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861)}
- H04L 9/3215: {using a plurality of channels (network architectures or network communication protocols using different networks H04L63/18)}
- H04L 25/0204: {of multiple channels}
- H04W 16/14: Spectrum sharing arrangements {between different networks}
- H04W 76/27: Transitions between radio resource control [RRC] states
- 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)
- H04B: TRANSMISSION
- H04J: MULTIPLEX COMMUNICATION (transmission in general H04B; peculiar to transmission of digital information H04L5/00; systems for the simultaneous or sequential transmission of more than one television signal H04N7/08; in exchanges H04Q11/00; stereophonic systems H04S)

## Abstract

A method for downlink data transmission and related products are provided. The method includes: a terminal receives downlink control information (DCI) for scheduling multiple physical downlink shared channels (PDSCHs), wherein the DCI contains transmission configuration indicator (TCI) state indication; and the terminal determines a TCI state which is applied to each of the multiple PDSCHs according to at least one TCI state indicated by the TCI state indication.

## Claims

### Claim 1

A method for downlink data transmission, comprising:
receiving, by a terminal, DCI for scheduling multiple PDSCHs, wherein the DCI contains a TCI state indication; and
determining, by the terminal, a TCI state which is applied to each of the multiple PDSCHs according to at least one TCI state indicated by the TCI state indication;
wherein the multiple PDSCHs are N PDSCHs, the at least one TCI state is K TCI states and K equals to 2; and the K TCI states are applied to the N PDSCHs in circular or in sequence;
under the condition that the multiple PDSCHs are applied to the at least one TCI state in circular:
when N=K=2, an index sequence of the TCI states corresponding to the two PDSCHs is {0, 1}; and
when N>K=2, the n-th PDSCH in the multiple PDSCHs corresponds to the k-th TCI state in the at least one TCI state, and k=[(n−1) mod K+1].

### Claim 2 (depends on 1)

The method of claim 1, wherein under the condition that the multiple PDSCHs are applied to the at least one TCI state in circular:
when N=4>K=2, the index sequence of the TCI states corresponding to the four PDSCHs is {0, 1, 0, 1}; and
when N=8>K=2, the index sequence of the TCI states corresponding to the eight PDSCHs is {0, 1, 0, 1, 0, 1, 0, 1}.

### Claim 3 (depends on 1)

The method of claim 1, wherein under the condition that the K TCI states are applied to the N PDSCHs in sequence:
when N=K=2, the index sequence of the TCI states corresponding to the two PDSCHs is {0, 1}; and
when N=4>K=2, the index sequence of the TCI states corresponding to the four PDSCHs is {0,0,1,1}.

### Claim 4 (depends on 1)

The method of claim 1, wherein under the condition that the K TCI states are applied to the N PDSCHs in sequence, the n-th PDSCH in the multiple PDSCHs corresponds to the k-th TCI state in the at least one TCI state, and k=[n/m].

### Claim 5 (depends on 1)

The method of claim 1, wherein the multiple PDSCHs carry the same data.

### Claim 6 (depends on 1)

The method of claim 1, wherein the multiple PDSCHs are transmitted across consecutive slots, across consecutive PDSCH transmission occasions, or in a single slot.

### Claim 7 (depends on 1)

The method of claim 1, wherein the multiple PDSCHs are transmitted based on at least one of: a same demodulation reference signal (DMRS) port, a same orthogonal frequency division multiplexing (OFDM) symbol, or a same modulation and coding scheme (MCS) and a same hybrid automatic repeat request (HARQ) process.

### Claim 8

A terminal, comprising:
a processor;
a transceiver; and
a memory storing one or more programs which, when executed by the processor, are operable with the transceiver to receive DCI for scheduling multiple PDSCHs, wherein the DCI contains TCI state indication, and operable with the processor to determine a TCI state which is applied to each of the multiple PDSCHs according to at least one TCI state indicated by the TCI state indication;
wherein the multiple PDSCHs are N PDSCHs, the at least one TCI state is K TCI states and K equals to 2; and the K TCI states are applied to the N PDSCHs in circular or in sequence;
under the condition that the multiple PDSCHs are applied to the at least one TCI state in circular:
when N=K=2, an index sequence of the TCI states corresponding to the two PDSCHs is {0, 1}; and
when N>K=2, the n-th PDSCH in the multiple PDSCHs corresponds to the k-th TCI state in the at least one TCI state, and k=[(n−1) mod K+1].

### Claim 9 (depends on 8)

The terminal of claim 8, wherein under the condition that the multiple PDSCHs are applied to the at least one TCI state in circular:
when N=4>K=2, the index sequence of the TCI states corresponding to the four PDSCHs is {0, 1, 0, 1}; and
when N=8>K=2, the index sequence of the TCI states corresponding to the eight PDSCHs is {0, 1, 0, 1, 0, 1, 0, 1}.

### Claim 10 (depends on 8)

The terminal of claim 8, wherein under the condition that the K TCI states are applied to the N PDSCHs in sequence:
when N=K=2, the index sequence of the TCI states corresponding to the two PDSCHs is {0, 1}; and
when N=4>K=2, the index sequence of the TCI states corresponding to the four PDSCHs is {0,0,1, 1}.

### Claim 11 (depends on 8)

The terminal of claim 8, wherein under the condition that the K TCI states are applied to the N PDSCHs in sequence, the n-th PDSCH in the multiple PDSCHs corresponds to the k-th TCI state in the at least one TCI state, and k=[n/m].

### Claim 12 (depends on 8)

The terminal of claim 8, wherein the multiple PDSCHs carry the same data.

### Claim 13 (depends on 8)

The terminal of claim 8, wherein the multiple PDSCHs are transmitted across consecutive slots, across consecutive PDSCH transmission occasions, or in a single slot.

### Claim 14 (depends on 8)

The terminal of claim 8, wherein the multiple PDSCHs are transmitted based on at least one of: a same demodulation reference signal (DMRS) port, a same orthogonal frequency division multiplexing (OFDM) symbol, or a same modulation and coding scheme (MCS) and a same hybrid automatic repeat request (HARQ) process.

### Claim 15

A network device, comprising:
a processor;
a transceiver; and
a memory storing one or more programs which, when executed by the processor, are operable with the transceiver to:
determine a TCI state which is applied to each of the multiple PDSCHs according to at least one TCI state indicated by the TCI state indication;
send DCI for scheduling multiple PDSCHs, wherein the DCI contains a TCI state indication;
wherein the multiple PDSCHs are N PDSCHs, the at least one TCI state is K TCI states and K equals to 2; and the K TCI states are applied to the N PDSCHs in circular or in sequence;
under the condition that the multiple PDSCHs are applied to the at least one TCI state in circular:
when N=K=2, an index sequence of the TCI states corresponding to the two PDSCHs is {0, 1}; and
when N>K=2, the n-th PDSCH in the multiple PDSCHs corresponds to the k-th TCI state in the at least one TCI state, and k=[(n−1) mod K+1].

### Claim 16 (depends on 15)

The network device of claim 15, wherein under the condition that the multiple PDSCHs are applied to the at least one TCI state in circular:
when N=4>K=2, the index sequence of the TCI states corresponding to the four PDSCHs is {0, 1, 0, 1}; and
when N=8>K=2, the index sequence of the TCI states corresponding to the eight PDSCHs is {0, 1, 0, 1, 0, 1, 0, 1}.

### Claim 17 (depends on 15)

The network device of claim 15, wherein under the condition that the K TCI states are applied to the N PDSCHs in sequence:
when N=K=2, the index sequence of the TCI states corresponding to the two PDSCHs is {0, 1}; and
when N=4>K=2, the index sequence of the TCI states corresponding to the four PDSCHs is {0,0,1, 1}.

### Claim 18 (depends on 15)

The network device of claim 15, wherein under the condition that the K TCI states are applied to the N PDSCHs in sequence, the n-th PDSCH in the multiple PDSCHs corresponds to the k-th TCI state in the at least one TCI state, and k=[n/m].

### Claim 19 (depends on 15)

The network device of claim 15, wherein the multiple PDSCHs carry the same data.

### Claim 20 (depends on 15)

The network device of claim 15, wherein the multiple PDSCHs are transmitted across consecutive slots, across consecutive PDSCH transmission occasions, or in a single slot.