Provided are a method and an apparatus for transmitting grant-free based uplink data in a wireless communication system. Specifically, a terminal receives, from a base station, allocation information for a grant-free uplink resource that is semi-statically allocated. The terminal receives, from the base station, allocation information for a first reference signal used for initial transmission of uplink data and allocation information for a second reference signal used for retransmission of the uplink data. The terminal transmits the uplink data through the grant-free uplink resource by using the first reference signal. If decoding of the uplink data fails, the terminal receives, from the base station, an uplink grant corresponding to the second reference signal. The terminal retransmits the uplink data by using the second reference signal on the basis of the uplink grant. The first reference signal is commonly allocated to the terminal, and the second reference signal is specifically allocated to the terminal.

Aspects of the disclosure relate to communication systems, apparatus and methods which enable or support transmitting/receiving downlink control information (DCI) carrying a downlink grant or an uplink grant. A method includes detecting a reference length based on an effective length of a downlink (DL) grant DCI and an effective length of an uplink (UL) grant DCI and calculating a length difference based on the effective DL grant DCI length and the effective UL grant DCI length. A length of a padding field in the DL grant DCI and/or the UL grant DCI is set equal to the calculated length difference such that the lengths of the DL grant DCI and UL grant DCI are both equal to the reference length. Padding bits are inserted in the padding field of the DL grant DCI and/or the UL grant DCI. Thereafter, the DL grant DCI and/or the UL grant DCI is encoded and transmitted to a scheduled entity.

A method and an apparatus for beam failure recovery in a communication system. The method for beam failure recovery includes the steps of: searching for a plurality of candidate beams when a beam failure is detected; transmitting a beam failure recovery request signal to a base station by using beam #1 of the plurality of candidate beams; receiving a beam failure recovery response signal in response to the beam failure recovery request signal via beam #1 from the base station; and transmitting an SR requesting a resource for transmission of multi-beam setting information to the base station, where the multi-beam setting information includes indexes of one or more beams excluding beam #1 of the plurality of candidate beams.

An information transmission method, a communications device, and a network device are provided. The information transmission method includes: when a communications device is at a coverage enhancement level 0 or a coverage enhancement level 1, or in coverage enhancement mode A, receiving a random access response, wherein the random access response comprises indication information and uplink grant information, the indication information is used to indicate a message 3 is a first message 3 or a second message 3, wherein the uplink grant information comprises first resource information and repetition quantity information; and sending the message 3 based on the indication information, the first resource information, and the repetition quantity information. The method and the device that are provided in embodiments of this application may be applied to a communications system, such as V2X, LTE-V, V2V, an internet of vehicles, MTC, LTE-M, M2M, or an internet of things.

Various solutions for handling multiple active configurations of configured grant with respect to user equipment and network apparatus in mobile communications are described. An apparatus may determine whether multiple active configurations of a configured grant corresponding to a bandwidth part of a serving cell are configured. The apparatus may apply a restriction on an initial transmission of a transport block (TB) in an event that the multiple active configurations of the configured grant are configured. The apparatus may perform the initial transmission of the TB according to the restriction.

A method of resource selection by a user equipment (UE) is provided. The method includes detecting a need of an uplink transmission having a plurality of transmission parameters for at least one application from a plurality of applications having an associated transmission requirement. The method includes determining a set of configured grant resources available to the UE along with the associated plurality of grant resource parameters. The method includes determining transmission capability for the set of configured grant resources by analyzing the grant resource parameters. The method includes selecting at least one configured grant resource from the set of configured grant resources satisfying at least one transmission requirement of the at least one application.

Methods, systems, and devices for wireless communications are described. A communication device, which may be otherwise known as a user equipment may receive control signaling that configures the communication device with a set of configured grant configurations. The communication device may receive, via a group control channel, group downlink control information (DCI) for a plurality of communication devices that includes the communication device. In some examples, the group control channel may be a group physical downlink control channel. The communication device may communicate a data transmission in accordance with a first configured grant configuration of the plurality of configured grant configurations based on a configuration indication in the group DCI indicating the first configured grant configuration.

Disclosed embodiments provide a framework rescheduling traffic for improved efficiency using a cellular network. A method includes receiving an uplink (UL) grant, wherein the UL grant schedules a Physical Uplink Shared Channel (PUSCH). A frequency resource for the PUSCH is allocated within an active UL Bandwidth Part (BWP) of a user equipment (UE). The frequency resource is allocated using a physical resource block (PRB) index of the active UL BWP. The method includes receiving an UL cancellation indication (CI) that indicates a UL resource in a reference UL resource, wherein the reference UL resource is allocated within a carrier including at least the active UL BWP. The frequency resource is allocated using a common resource block (CRB) index of the carrier. The method further includes determining whether the UL resource overlaps with the PUSCH and cancelling the PUSCH as a result of the UL resource overlapping with the PUSCH.

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may determine that uplink data associated with a first quality of service flow is available for transmission to a base station. The UE may transmit a buffer status report to the base station. In some examples, the buffer status report may include a buffer status of the first quality of service flow. The UE may then receive an uplink grant based on transmitting the buffer status report, and may transmit the uplink data based on the uplink grant.

A user equipment (UE) includes one or more non-transitory computer-readable media containing computer-executable instructions embodied therein, and at least one processor coupled to the one or more non-transitory computer-readable media. The at least one processor is configured to execute the computer-executable instructions to receive a dynamic grant for scheduling a first uplink (UL) resource, determine whether to obtain a first Medium Access Control (MAC) protocol data unit (PDU) for transmission using the first UL resource or to transmit a second MAC PDU before obtaining the first MAC PDU, and transmit the second MAC PDU using the first UL resource when the first UL resource is suitable for transmitting the second MAC PDU.