Methods, systems, and devices for wireless communication are described. A user equipment (UE) may obtain, via broadcast signaling or UE-specific signaling, an indication of an uplink communications configuration for one or more uplink wireless communications that span a set of one or more transmission time intervals (TTIs). The indication may be based on one or more types of the one or more uplink wireless communications. The UE may determine a duration of time for which an uplink pre-compensation is to be applied to the one or more uplink wireless communications. The duration of time may be based on one or more parameters of the uplink communications configuration. The UE may output the one or more uplink wireless communications within the duration of time with the uplink pre-compensation applied.

A method of operating a terminal device in a wireless telecommunications network comprising the terminal device and a base station. The wireless telecommunications network supports a random access procedure comprising an exchange of random access procedure messages between the terminal device and the base station. At least one of the random access procedure messages is a variable size uplink message. The method comprises: receiving from the base station an instruction to perform the random access procedure, wherein the instruction to perform the random access procedure comprises an indication of a message size to be used by the terminal device for the variable size uplink message during the random access procedure; and performing the random access procedure by exchanging random access procedure messages with the base station, including transmitting the uplink message of variable size with a size corresponding to the indicated message size received from the base station.

An example method in a wireless device operating in a wireless network comprises generating a random access preamble signal and transmitting the random access preamble signal. The generated random access preamble signal comprises a random access symbol group that comprises a plurality of consecutive symbols, where each of the plurality of consecutive symbols being modulated on a corresponding subcarrier frequency and each of the plurality of consecutive symbols corresponding to a truncated sinusoid of 3.75/N kHz, with N>1.

Apparatuses, methods, and systems are disclosed for selecting a base unit in response to a handover condition being triggered. One method (1000) includes selecting (1002) a base unit of multiple base units for handover in response to at least one base unit of the multiple base units triggering a handover condition. The method (1000) includes transmitting (1004) a random access preamble to the base unit. The method (1000) includes performing (1006) a reestablishment procedure to establish communication with one base unit of the multiple base units in response to determining an inability to access each base unit of the multiple base units that meets the handover condition.

A terminal device is operative to receive a broadcast message (91) from a cellular network, the broadcast message (91) including at least one bit associated with coverage enhancement, CE, operation of the terminal device. The terminal device is operative to control, when the terminal device is in CE operation, a radio interface to selectively delay, based on the at least one bit included in the broadcast message (91), a CE level dependent repetition of a random access preamble transmission (93, 94).

Methods, systems, and devices for wireless communication are described. A base station may determine a measurement scheme or uplink mode and then transmit an indication of the scheme or uplink mode to an associated user equipment (UE). The base station may identify a set of hidden nodes for the UE and configure the UE for autonomous or grant-based uplink transmissions accordingly. A UE may initiate a channel clearance scheme by transmitting a first channel clearance signal (e.g., a request-to-send message), which may include a UE identifier before transmitting an uplink message in the unlicensed radio frequency spectrum band. In response, the base station may transmit a second channel clearance signal (e.g., a clear-to-send message). In some cases, the second channel clearance signal may include control information or may be transmitted at a power level that is based on a characteristic of the UE.

A terminal according to one aspect of the present disclosure includes: a receiving section configured to receive information on association between services and resources; and a transmitting section configured to perform transmission processing by using a resource that is included in the information on association and corresponds to a service to be used. According to one aspect of the present disclosure, when there are TRPs to which different services are applied, communication can be appropriately controlled.

A random access method and apparatus, the method comprising: a terminal device sending a first message to a network device, the first message including a random access preamble and uplink information; the random access preamble occupies at least one first symbol in the time domain, and the uplink information occupies at least one second symbol in the time domain, the one first symbol comprises a first cyclic prefix (CP) and at least one first information segment, and the one second symbol comprises a second CP and at least one second information segment. The random access method and apparatus of an implementation of the present disclosure may reduce signaling overhead during random access.

Methods and apparatuses are disclosed for signaling unused channel occupancy time (COT) to the gNB for COT sharing among other UEs. Upon determining that a portion of the maximum COT (MCOT) provided to the UE will be unused, the UE can generate COT sharing information for transmission back to the gNB. The COT sharing information identifies a starting point and a duration (e.g., a number of consecutive slots) of the unused portion of the MCOT. This information is then encoded into configured grant uplink control information (UG-UCI) and transmitted to the gNB as part of the uplink transmission. In aspects, the unused portion may begin part-way through a slot. In this instance, a starting symbol of the unused portion or an ending symbol of the used portion may also be encoded into the uplink transmission. In this manner, unused COT is not wasted, but rather repurposed by the gNB.

A user equipment (UE) is configured to initiate a two-step random access channel (RACH) procedure to synchronize with a base station, initiate a fallback four-step RACH procedure after the two-step RACH procedure, configure a random access preamble transmission for the four-step RACH procedure, wherein configuring the random access preamble transmission comprises deriving a physical random access channel (PRACH) transmit power parameter value based on a parameter used to perform a transmission during the two-step RACH procedure and transmit the random access preamble for the four-step RACH procedure to the base station.