Wireless communications systems and methods related to communicating control information are provided. A method of wireless communication performed by a user equipment (UE) may include mapping a power reservation signal of a sub-slot resource pool (RP) to an AGC symbol location of a slot RP and transmitting, to at least one other UE, the power reservation signal, wherein a transmit power level of the power reservation signal is based on an estimated transmit power level associated with at least one sub-slot.

This disclosure provides systems, methods, and devices for wireless communication that support controlling transmit power of one or more groups of user equipment (UE) sidelinks using a single sidelink control transmission of group transmit power control (TPC) information. A first UE may transmit group TPC information to one or more groups of UEs, such as by including the group TPC information in sidelink control information (SCI). The group TPC information may include a group TPC indicator and one or more TPC messages for providing one or more group TPC commands with respect to groups of sidelinks. The group TPC commands may provide for power control with respect to a respective group of UEs for one or more channels. Other aspects and features are also claimed and described.

This disclosure provides systems, methods, and devices for wireless communication that support closed-loop transmit power control (TPC) for user equipment (UE) sidelink communications. TPC information may be provided, by a first UE receiving transmissions from a second UE, with respect to a sidelink implemented between the UEs. TPC information may be multiplexed with sidelink data traffic in a sidelink communication between UEs. The TPC information may include a TPC indicator and one or more TPC messages for providing TPC commands with respect to one or more sidelinks. The sidelink data traffic of some examples may include data-only traffic, such as semi-persistent scheduled (SPS) data traffic, that is decoupled from accompanying sidelink control information (SCI). Other aspects and features are also claimed and described.

Embodiments of this application provide a conflict resolving method and a terminal device. When uplink transmission conflicts with sidelink transmission in time, the terminal device can resolve the data transmission conflict based on a ProSe per-packet priority (PPPP) of data on a sidelink and a limit, thereby satisfying data transmission requirements in Release 15 and subsequent Releases. The method is applied to terminal-to-terminal communication. A terminal device needs to transmit sidelink data on M first-type carriers and transmit uplink data on N second-type carriers, and M and N are positive integers. The method includes: determining, by the terminal device based on a PPPP of the sidelink data transmitted on the M first-type carriers and a first limit, to preferentially transmit the sidelink data on some or all of the M first-type carriers, or to preferentially transmit the uplink data on some or all of the N second-type carriers.

The present disclosure provides a method for sidelink transmission, the method comprising: determining by a User equipment (UE) a parameter configuration for the slot aggregation transmission; determining by the UE an resource for slot aggregation based on the parameter configuration; and performing by the UE the Physical Sidelink Shared Channel (PSSCH) transmission and the associated Physical Sidelink Control Channel (PSCCH) transmission on the resource for slot aggregation.

Embodiments of the present disclosure relate to methods, devices and computer readable media for communication. A method comprises determining, at a first terminal device, a time window during which a second terminal device is to filter Sidelink Reference Signal Received Power (SL-RSRP) of sidelink transmissions received from the first terminal device; receiving, from the second terminal device, the filtered SL-RSRP during the time window; estimating a sidelink path loss based on the filtered SL-RSRP; and applying the sidelink path loss to power control of at least one subsequent sidelink transmission from the first terminal device to the second terminal device. In this way, the SL path loss can be estimated more accurately and reasonably, and thus the power control based on the the SL path loss can be performed more effectively.

Methods, apparatuses, and computer-readable medium for soft cancellation of sidelink transmissions are provided. An example method may include receiving, from a base station, DCI comprising at least one of: an open loop power control parameter, a maximum transmit power, or a closed loop power control parameter. The open loop power control parameter, the maximum transmit power, or the closed loop power control parameter may be associated with a PSSCH or a PSCCH. The example method may further include reducing a transmit power of a scheduled transmission associated with the PSSCH or the PSCCH to a reduced transmit power if the reduced transmit power is above a threshold or cancel the scheduled transmission if the reduced transmit power is below the threshold. The reduced transmit power may be based on the open loop power control parameter, the maximum transmit power, or the closed loop power control parameter.

The present disclosure discloses a method and a device in nodes used for wireless communications. A first node first receives a first radio signal and a second radio signal; and then determines that transmitting power of first control information in a first time window is a first power value and transmitting power of second control information in a second time window is a second power value; and transmits the first control information in the first time window with the first power value; the first power value is unrelated to the second power value, and the second power value is relevant to whether the first time window overlaps with the second time window. The present disclosure designs power allocation priorities of first control information and second control information to optimize both transmission performance and efficiency of a feedback channel in sidelink.

Disclosed are techniques for wireless communication. In an aspect, a user equipment (UE) participating in a sidelink communications group communicates with one or more member UEs of the sidelink communications group, and transmits group presence announcement messages for the sidelink communications group based on a determination, based on communicating with the one or more member UEs, of at least a transmit power for the group presence announcement messages and that the UE is expected to transmit the group presence announcement messages for the sidelink communications group.

The present invention provides a method of determining a transmission power for device to device, D2D, transmissions between a first user equipment device and a second user equipment device using transmission resources being used for transmissions to a cellular network entity by a third user equipment device, the method comprising determining a measure of a path loss between the cellular network entity and the first user equipment device, and using the measure of the path loss to determine a maximum transmission power such that the D2D transmissions are received at the cellular network entity with a signal level around or below a noise level.