Huawei Technologies Co., Limited

Hongjia Su

Zhengzheng Xiang

Lei Lu

Jinfang Zhang

Wenting Guo

Yingpei Lin

Jiyong Pang

Jun Luo

Jian Ding

Lei Dong

Jun Zhu

Jiayin Zhang

Xiang Mi

Weiwei Fan

Tianze Li

Dengyu Qiao

A data transmission method and apparatus are applicable to fields such as V2X, intelligent driving, and connected vehicles. A probability of a collision between a high-priority PSSCH and a low-priority PSSCH is reduced, thereby improving QoS of the high-priority PSSCH. The method includes: obtaining resource pool configuration information including first resource pool information and second resource pool information, where the first resource pool information indicates a first resource pool, and the second resource pool information indicates a second resource pool; obtaining a first priority value corresponding to a physical sidelink shared channel PSSCH; when the first priority value is less than a first priority threshold, determining, in a partial-sensing-selection-based resource determination mechanism and/or a random-selection-based resource determination mechanism in the first resource pool, a resource for sending the PSSCH.

Data transmission method and apparatus, and system

In accordance with an embodiment, a method includes: obtaining, at least one first time window in a time-frequency resource set, wherein the time-frequency resource set is used by a terminal to send sidelink communication information; obtaining first control information from a second terminal, wherein the first control information comprises activation indication information; activating one of the at least one first time window based on the first control information to establish an active first time window; stopping a determining by sensing the time-frequency resource set, a time-frequency resource for sending the sidelink communication information in the active first time window; receiving first indication information from the second terminal in the active first time window, wherein the first indication information indicates at least one time-frequency resource; and sending first sidelink communication information on the at least one time-frequency resource.

Communication method and apparatus

The method includes: determining, by a first communications device, a first BWP for each second communications device in a second communications device group, where the second communications device group includes two or more second communications devices, and the first BWPs of all the second communications devices in the second communications device group are the same; sending, by the first communications device, configuration information of the first BWP to each second communications device in the second communications device group; and sending, by the first communications device, control signaling to all the second communications devices in the second communications device group, where the control signaling is used to indicate all the second communications devices in the second communications device group to activate the first BWP.

Resource configuration method, first communications device, second communications device, and system

A resource configuration method for sidelink information, a communication device, a network device, and a system the method including receiving first indication information from a network device, where the first indication information indicates a first, second, and third resource in one slot, where the first resource is used for transmitting uplink information, the second resource is used for transmitting downlink information, and the third resource is used for transmitting first information or not transmitting information, the first information comprising uplink information, downlink information, or sidelink information, receiving second indication information from the network device, the second indication information indicating a fourth resource belonging to the first resource, and being used for transmitting sidelink information to a second communication device, and sending a sidelink information to the second communication device on the fourth resource, the sidelink information including sidelink feedback information.

Resource configuration method for sidelink information, communication device, and network device

A multiple-input multiple-output communication method is disclosed. The method includes: determining v adjustment factors corresponding to v layers in multiple-input multiple-output, where one layer corresponds to one adjustment factor, and v is an integer greater than 1; and performing an encoding procedure on a transport block based on the v adjustment factors, where the encoding procedure includes: determining a quantity of bits of the transport block, performing rate matching, and performing layer mapping.

A method for determining a transport block size includes: determining an overhead of a sidelink data channel PSSCH demodulation reference signal (DMRS) in a physical resource block (PRB) of a first time-frequency resource, where the first time-frequency resource includes a first time unit in time domain; and determining, based on the overhead of the PSSCH DMRS, a number of resource elements (REs) on the first time-frequency resource that are for data transmission, where the number of REs for data transmission is for determining a transport block size (TBS) of the sidelink data channel PSSCH. The method provides a combined gain of a plurality of transmissions of a same transport block, and supports DMRS configurations of different quantities of DMRS symbols in initial transmission and retransmission of one transport block.

Method and apparatus for determining transport block size

A communication method and a communication apparatus, the method including determining, based on a quantity of resource elements (REs) that are in a first time-frequency resource and that are used to transmit first information, a quantity of REs that are in the first time-frequency resource and that are used to transmit data, the first time-frequency resource including a first time unit in time domain and including a data channel resource in frequency domain, where the first information includes at least one of a control channel, a control channel demodulation pilot, a data channel demodulation pilot, second-stage control information, a phase tracking reference signal (PTRS), or a channel state information reference signal (CSI-RS).

Communication method and communication apparatus

A communication method and apparatus are provided, and are applicable to fields such as V2X, internet of vehicles, intelligent connected vehicles, assisted driving, and intelligent driving. The method includes: A first terminal device may map first control information to a first transmission resource, and map second information including second control information and data to a second transmission resource and a third transmission resource, and may map the second information to the second transmission resource that does not overlap the first transmission resource in time domain.

Resource mapping for transmitting sidelink control information

A sidelink control information sending and receiving method, a terminal apparatus, and a system are provided in this application, and may be applied to fields such as vehicle-to-everything (for example, V2X, LTE-V, or V2V), intelligent driving, and an intelligent connected vehicle. In a scenario in which second-stage SCI is not required in a sidelink communication system, a transmit end apparatus in sidelink communication indicates, by using first-stage SCI, a cyclic redundancy check bit corresponding to the first-stage SCI, or a reference signal used to demodulate the first-stage SCI, that the transmit end apparatus is not to send the second-stage SCI to a receive end apparatus. In this way, the transmit end apparatus may flexibly choose, based on a specific scenario of the sidelink communication, to use 2-stage SCI or 1-stage SCI, to avoid resource waste caused by using the 2-stage SCI in any scenario of the sidelink communication, thereby improving resource utilization efficiency.

Sidelink control information sending and receiving method, terminal apparatus, and system

This application provides a power control method and a power control apparatus. The method includes: sending, by a first terminal device, a first signal to a second terminal device at a first transmit power; receiving, by the first terminal device, first information from the second terminal device, where the first information is used to indicate or includes a first received power, and the first received power is a received power of the first signal; determining, by the first terminal device, an estimated value of a path loss between the first terminal device and the second terminal device based on the first transmit power and the first received power. According to this application, power control can be properly performed. This application may be applied to an internet of vehicles, for example, V2X, LTE-V, and V2V, or may be applied to fields such as D2D, intelligent driving, and intelligent connected vehicles.

Power control method and power control apparatus

This application provides example reference signal transmission methods, apparatuses, and systems. An example method includes determining a first transmission parameter in at least two transmission parameters, where any two of the at least two transmission parameters are different, and the first transmission parameter is used to determine a first transmission resource for a first reference signal. The first reference signal is sent to a second communication apparatus on the first transmission resource.

Reference signal transmission method, apparatus, and system

This application provides a method for determining a transport block size and a communication apparatus, which may be used in systems such as vehicle-to-everything, V2X, and V2V. A receive-end terminal device and a transmit-end terminal device may determine a quantity of encoded symbols based on a symbol length used for sidelink communication in a time unit and an scaling factor, and may further determine a transport block size of a data channel based on the quantity of encoded symbols. Therefore, for all slots used for sidelink communication, a same quantity of encoded symbols can be determined, and a same transport block size can be further determined.

Method for determining transport block size and communication apparatus

This application provides example signal transmission method and apparatus. One example method includes sending, by a first terminal device to a second terminal device, indication information indicating a signal transmission resource. Listen before talk (LBT) is performed by the first terminal device before transmission with the second terminal device is performed. Transmission with the second terminal device is performed by the first terminal device according to the indication information.

Indication signal transmission method and apparatus

A PSFCH sending method and an apparatus are provided, and relate to V2X, an intelligent vehicle, autonomous driving, an intelligent connected vehicle, and the like. The method may include: a first terminal apparatus receives first sidelink data from a second terminal apparatus, and determines, based on a transmission resource of the first sidelink data, a feedback resource used to send SFCI. The transmission resource of the first sidelink data and the feedback resource include N resource elements, and N is a positive integer. When X resource elements are required for sending first feedback information, and X is less than N, the first terminal apparatus sends at least one piece of SFCI to the second terminal apparatus on the feedback resource through at least one PSFCH. The SFCI includes the first feedback information, and the first feedback information indicates whether the first terminal apparatus correctly receives the first sidelink data.

PSFCH sending method and apparatus

The present disclosure relates to feedback channel sending methods. In one example method, a first terminal device obtains configuration information of a resource pool, where the configuration information is used to indicate that frequency domain resources of the resource pool include L sub-channels and each sub-channel includes q resource blocks (RBs), M of the L sub-channels are used by the first terminal device to send at least one of a physical sidelink control channel (PSCCH) or a physical sidelink shared channel (PSSCH), N of the L sub-channels are used by the first terminal device to receive a physical sidelink feedback channel (PSFCH) from a second terminal device, and there is a correspondence between one of the M sub-channels and one of N·q RBs included in the N sub-channels, and sends at least one of a first PSCCH or a first PSSCH on a first channel in a slot n.

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Shanghai, China

Hongjia Su