# US 2022/0286249 A1 · Method and apparatus for transmission configuration

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- Number: US 2022/0286249 A1
- Document ID: US20220286249A1
- Status: Published application
- Kind: A1
- Application number: 17/634,500
- Filed: 2019-08-13
- Published: 2022-09-08
- Earliest claimed: 2019-08-13
- Assignees: Telefonaktiebolaget LM Ericsson (publ)
- Applicants: Telefonaktiebolaget LM Ericsson (publ)
- Inventors: Chunhui LIU; Qi ZHANG
- Web page: https://patentgrep.com/patent/US20220286249A1

## CPC

- H04L 5/0048: {Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091)}
- H04L 67/34: {involving the movement of software or configuration parameters (network booting or remote initial program loading [RIPL] G06F9/4416)}
- H04L 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal}
- H04L 5/0094: {Indication of how sub-channels of the path are allocated}
- H04L 69/24: Negotiation of communication capabilities
- H04W 24/08: Testing, {supervising or monitoring} using real traffic
- H04W 72/542: using measured or perceived quality
- 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

Various embodiments of the present disclosure provide a method for transmission configuration. The method which may be performed by a network node comprises determining one or more uplink transmission parameters for a terminal device based at least in part on downlink information reported by the terminal device. The method may further comprise transmitting configuration information to the terminal device to indicate the one or more uplink transmission parameters.

## Claims

### Claim 1

A method performed by a network node, comprising:
determining one or more uplink transmission parameters for a terminal device based at least in part on downlink information reported by the terminal device; and
transmitting configuration information to the terminal device to indicate the one or more uplink transmission parameters.

### Claim 2 (depends on 1)

The method of claim 1, wherein the terminal device is configured by the network node to perform sounding reference signal transmission at a frequency lower than a first threshold, or not to perform the sounding reference signal transmission.

### Claim 3 (depends on 1)

The method of claim 1, wherein the determination of the one or more uplink transmission parameters for the terminal device based at least in part on the downlink information reported by the terminal device comprises:
determining the one or more uplink transmission parameters, according to a map between the one or more uplink transmission parameters and one or more downlink transmission parameters indicated by the downlink information.

### Claim 4 (depends on 3)

The method of claim 3, wherein the map between the one or more uplink transmission parameters and the one or more downlink transmission parameters comprises:
mapping from the one or more downlink transmission parameters to the one or more uplink transmission parameters; and
a weight per mapping.

### Claim 5 (depends on 4)

The method of claim 4, wherein the weight per mapping meets a specific criterion.

### Claim 6 (depends on 3)

The method of claim 3, wherein the map between the one or more uplink transmission parameters and the one or more downlink transmission parameters is determined according to statistical information related to uplink transmission and downlink transmission.

### Claim 7 (depends on 1)

The method of claim 1, wherein the one or more uplink transmission parameters for the terminal device are further based at least in part on one or more of:
capability of the terminal device;
uplink measurement for the terminal device;
uplink power headroom of the terminal device;
downlink transmission feedback from the terminal device;
a difference between uplink transmission and downlink transmission of the terminal device;
a difference between effective quality and estimated quality of the uplink transmission of the terminal device; and
a type of a service for the terminal device.

### Claim 8 (depends on 1)

The method of claim 1, wherein the one or more uplink transmission parameters comprise at least one of an uplink transmission rank and a transmission precoding matrix indicator.

### Claim 9 (depends on 1)

The method of claim 1, further comprising:
receiving, from the terminal device, uplink transmission to which the one or more uplink transmission parameters are applied.

### Claim 10 (depends on 9)

The method of claim 9, further comprising:
adjusting the one or more uplink transmission parameters, based at least in part on the received uplink transmission from the terminal device; and
informing the terminal device of the one or more adjusted uplink transmission parameters.

### Claim 11 (depends on 9)

The method of claim 9, further comprising:
instructing the terminal device to transmit a sounding reference signal to the network node, in response that quality of the received uplink transmission is lower than a second threshold.

### Claim 12 (depends on 1)

The method of claim 1, wherein the terminal device is equipped with one or more antennas of which a number is less than or equal to a third threshold.

### Claim 13 (depends on 12)

The method of claim 12, wherein the configuration information indicates a transmission precoding matrix indicator which is randomly selected by the network node for uplink transmission of the terminal device.

### Claim 14 (depends on 3)

The method of claim 3, wherein the map between the one or more uplink transmission parameters and the one or more downlink transmission parameters is updated according to sounding reference signal measurement performed by the network node.

### Claim 15 (depends on 14)

The method of claim 14, wherein the sounding reference signal measurement is performed for one or more terminal devices scattered over a cell coverage of the network node.

### Claim 16 (depends on 14)

The method of claim 14, wherein the sounding reference signal measurement is performed periodically.

### Claim 17

A method performed by a terminal device, comprising:
receiving configuration information from a network node, wherein the configuration information indicates one or more uplink transmission parameters which are based at least in part on downlink information reported to the network node by the terminal device.

### Claim at position 18

18-32. (canceled)

### Claim 33

A network node, comprising:
one or more processors; and
one or more memories storing computer program codes, wherein the network node is configured to:
determine one or more uplink transmission parameters for a terminal device based at least in part on downlink information reported by the terminal device; and
transmit configuration information to the terminal device to indicate the one or more uplink transmission parameters.

### Claim at position 20

34-38. (canceled)