# US 11,445,497 B2 · Transmission parameter configuration method and apparatus

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- Number: US 11,445,497 B2
- Document ID: US11445497B2
- Status: Granted
- Kind: B2
- Application number: 17/050,558
- Filed: 2019-04-28
- Published: 2021-04-29
- Granted: 2022-09-13
- Earliest claimed: 2018-04-28
- Assignees: Huawei Technologies Co., Ltd.
- Applicants: Huawei Technologies Co., Ltd.
- Inventors: Yongbo Zeng; Yu Cai; Jian Wang
- Web page: https://patentgrep.com/patent/US11445497B2

## CPC

- H04W 72/044: based on the type of the allocated resource
- H04L 5/00: Arrangements affording multiple use of the transmission path
- 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)}
- H04W 4/06: Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
- H04W 4/40: for vehicles, e.g. vehicle-to-pedestrians [V2P]
- H04W 72/04: Wireless resource allocation
- H04W 72/0453: Resources in frequency domain, e.g. a carrier in FDMA
- H04W 72/20: Control channels or signalling for resource management
- H04W 72/30: Resource management for broadcast services
- H04W 72/542: using measured or perceived quality
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)

## Abstract

A transmission parameter configuration method includes a first device that determines a transmission parameter used for group communication, and sends information including the transmission parameter to a second device in a group through a broadcast message, where the first device is a management device of the group, and the transmission parameter includes a frequency domain resource or a demodulation reference signal (DMRS) pattern that is used for group communication of the group.

## Claims

### Claim 1

A transmission parameter configuration method implemented by a first device, wherein the transmission parameter configuration method comprises:
determining a transmission parameter for a first group communication, wherein the first device is a management device of a group, and wherein the transmission parameter comprises a demodulation reference signal (DMRS) pattern that is for a second group communication of the group;
sending information comprising the transmission parameter to a second device in the group through a broadcast message, wherein the broadcast message is a master information block-sidelink (MIB-SL) message transmitted on a physical sidelink broadcast channel (PSBCH) or a sidelink control information (SCI) message transmitted on a physical sidelink control channel (PSCCH); and
performing one of:
add a field indicating the DMRS pattern to the transmission parameter in the MIB-SL message when the broadcast message is the MIB-SL message transmitted on the PSBCH; or
send the information to the second device in the group on the resource through the SCI message when the broadcast message is the SCI message transmitted on the (PSCCH), wherein the SCI message comprises a field indicating the DMRS pattern.

### Claim 2 (depends on 1)

The transmission parameter configuration method of claim 1, wherein the transmission parameter comprises a frequency domain, and wherein the transmission parameter configuration method further comprises either:
monitoring time-frequency domain resources in a resource pool to obtain a monitoring result, and determining, based on the monitoring result, the frequency domain resource for a third group communication in the time-frequency resources in the resource pool; or
determining, based on a channel busy ratio (CBR) of a channel, the frequency domain resource for a fourth group communication in the channel.

### Claim 3 (depends on 1)

The transmission parameter configuration method of claim 1, wherein the transmission parameter comprises the DMRS pattern, and wherein the transmission parameter configuration method further comprises determining the DMRS pattern based on at least one of the following:
a block error rate (BLER);
a channel quality measurement result;
a signal quality and an association relationship between the signal quality and the DMRS pattern; or
geographic information.

### Claim 4 (depends on 1)

The transmission parameter configuration method of claim 1 further comprising:
determining a resource for the group communication or obtaining, from a network device, the resource; and
sending the information to the second device in the group on the resource through the broadcast message.

### Claim 5 (depends on 4)

The transmission parameter configuration method of claim 4, wherein the broadcast message is a Radio Resource Control (RRC) message transmitted on a physical sidelink shared channel (PSSCH).

### Claim 6 (depends on 5)

The transmission parameter configuration method of claim 5 further comprising sending the information to the second device in the group on the resource through the RRC message when the broadcast message is the RRC message transmitted on the PSSCH, and wherein the RRC message is carried in SCI-associated data.

### Claim 7

A first device comprising:
a memory configured to store a program; and
a processor coupled to the memory, wherein the program causes the processor to be configured to:
determining a transmission parameter for a first group communication, wherein the first device is a management device of a group, and wherein the transmission parameter comprises a demodulation reference signal (DMRS) pattern that is for a second group communication of the group;
sending information comprising the transmission parameter to a second device in the group through a broadcast message, wherein the broadcast message is a master information block-sidelink (MIB-SL) message transmitted on a physical sidelink broadcast channel (PSBCH) or a sidelink control information (SCI) message transmitted on a physical sidelink control channel (PSCCH); and
performing one of:
add a field indicating the DMRS pattern to the transmission parameter in the MIB-SL message when the broadcast message is a master information block-sidelink (MIB-SL) message transmitted on a physical sidelink broadcast channel (PSBCH); or
send the information to the second device in the group on the resource through the SCI message when the broadcast message is a sidelink control information (SCI) message transmitted on a physical sidelink control channel (PSCCH), wherein the SCI message comprises a field indicating the DMRS pattern.

### Claim 8 (depends on 7)

The first device of claim 7, wherein the transmission parameter comprises a frequency domain resource, and wherein the program further causes the processor to be configured to either:
monitor time-frequency domain resources in a resource pool to obtain a monitoring result, and determining, based on the monitoring result, the frequency domain resource for the group communication in the time-frequency resources in the resource pool; or
determine, based on a channel busy ratio (CBR) of a channel, the frequency domain resource for the group communication in the channel.

### Claim 9 (depends on 7)

The first device of claim 7, wherein the transmission parameter comprises the DMRS pattern, and wherein the program further causes the processor to be configured to configure the DMRS pattern based on at least any one of the following:
a block error rate (BLER);
a channel quality measurement result;
a signal quality and an association relationship that is between the signal quality and the DMRS pattern; or
geographic information.

### Claim 10 (depends on 7)

The first device of claim 7, wherein the program further causes the processor to be configured to:
determine a resource for the group communication, or obtain, from a network device, the resource; and
send the information to the second device in the group on the resource through the broadcast message.

### Claim 11 (depends on 10)

The first device of claim 10, wherein the broadcast message is a Radio Resource Control (RRC) message transmitted on a physical sidelink shared channel (PSSCH).

### Claim 12 (depends on 11)

The first device of claim 11, wherein the program further causes the processor to be configured to send the information to the second device in the group on the resource through the RRC message when the broadcast message is the RRC message transmitted on the PSSCH, and wherein the RRC message is carried in SCI-associated data.

### Claim 13 (depends on 7)

The first device of claim 7, wherein the first device is a vehicle.

### Claim 14

A computer program product comprising computer- executable instructions for storage on a non-transitory computer-readable medium that, when executed by a processor, cause an apparatus to:
determine a transmission parameter for a first group communication, wherein the apparatus is a management device of a group, and wherein the transmission parameter comprises a demodulation reference signal (DMRS) pattern that is for a second group communication of the group; and
send information comprising the transmission parameter to a second device in the group through a broadcast message, wherein the broadcast message is a master information block-sidelink (MIB-SL) message transmitted on a physical sidelink broadcast channel (PSBCH) or a sidelink control information (SCI) message transmitted on a physical sidelink control channel (PSCCH); and
perform one of:
add a field indicating the DMRS pattern to the transmission parameter in the MIB-SL message when the broadcast message is a master information block- sidelink (MIB-SL) message transmitted on a physical sidelink broadcast channel (PSBCH); or
send the information to the second device in the group on the resource through the SCI message when the broadcast message is a sidelink control information (SCI) message transmitted on a physical sidelink control channel (PSCCH).

### Claim 15 (depends on 4)

The transmission parameter configuration method of claim 4, wherein the resource for the group communication is pre-configured locally on the first device.

### Claim 16 (depends on 1)

The transmission parameter configuration method of claim 1 further comprising obtaining, at a physical layer of the first device from an application layer, an instruction for adjusting a transmission parameter, wherein the information is based on location information at the application layer.

### Claim 17 (depends on 14)

The computer program product of claim 14, wherein the DMRS pattern comprises information indicating a quantity of DMRS symbols in a time scheduling unit, a location of a time-frequency resource, and a subcarrier spacing.

### Claim 18 (depends on 14)

The computer program product of claim 14, wherein the transmission parameter comprises a frequency domain, and wherein the computer-executable instructions, when executed by the processor, further cause the apparatus to either:
monitor time-frequency domain resources in a resource pool to obtain a monitoring result, and determining, based on the monitoring result, the frequency domain resource for a third group communication in the time-frequency resources in the resource pool; or
determine, based on a channel busy ratio (CBR) of a channel, the frequency domain resource for a fourth group communication in the channel.