Abstract: A wireless device may communicate via one or more cells. Cell switching may cause the wireless device to switch from communicating via a serving cell to communicating via a target serving cell. Information for triggering a random access via a candidate serving cell may indicate to acquire early time alignment for the candidate serving cell. The information may indicate whether or not to monitor a channel for a response to a preamble transmission to the candidate serving cell.

Abstract: A wireless device comprises one or more processors and memory storing instructions. When executed by the one or more processors, the instructions cause the wireless device to receive one or more configuration parameters, for a non-terrestrial network (NTN), indicating candidate timing advance (TA) values for a first cell of cells. The instructions cause the wireless device to transmit, via the first cell, a preamble using a TA value selected from the candidate TA values based on one or more measurement power values of reference signals of the cells.

Abstract: A wireless device may communicate with a base station via a primary cell (PCell) and one or more secondary cells. A plurality of types of handovers, such as a layer 1/layer 2 triggered handover or a conditional handover, may be indicated to the wireless device for switching its PCell. One or more conditions, such as a priority associated with a handover type, may be used to determine which type of handover to perform.

Abstract: A wireless device may communicate with a base station. Timing advance information may be provided for scheduling sidelink transmission. For example, a wireless device may send a sidelink transmission to another device during a time duration that may be determined based on a timing advance value and/or a timing advance group index.

Abstract: One or more wireless devices may determine whether to initiate repetition of a transmission, based on characteristics of communications link, such as in a non-terrestrial network (NTN). Characteristics of the communications link may comprise, for example, distance/length, propagation delay, elevation angle, and/or reference signal received power (RSRP). Different random access resources may be used to indicate whether repetition is initiated.

Abstract: A wireless device receives configuration parameters indicating a first time alignment timer (TAT) for a first timing advance group (TAG) of a cell and a second TAT for a second TAG of the cell. The wireless device may also receive a random access response (RAR) comprising a timing advance command (TAC). In response to the first TAT not running and the second TAT running, the wireless device may apply the TAC for the first TAG to determine a first timing advance (TA) value and start the first TAT. Furthermore, the wireless device may transmit, via a the cell, a first uplink signal based on the first TA value of the first TAG and a second uplink signal based on a second TA value of the second TAG.

Abstract: A wireless device receives a packet corresponding to a hybrid automatic repeat request (HARQ) process, wherein the packet comprises a medium access control (MAC) control element (CE). Based on whether a feedback of the HARQ process being enabled or disabled, the wireless device applies the MAC CE after at least one of: a first time duration starting from transmission of feedback of the packet; or a second time duration starting from reception of the packet.

Abstract: A wireless device receives configuration parameters indicating a geographical area for a preconfigured uplink resource (PUR) configuration of a first cell. The wireless device may further transmit, when the first cell is a serving cell, an uplink signal via one or more PURs indicated by the PUR configuration. The wireless device may also maintain, when a second cell is the serving cell, the PUR configuration of the first cell based on a geographical location of the wireless device being within the geographical area.

Abstract: A wireless device may communicate with a base station by using overlapping transmissions. Information such as a channel state information (CSI) report may be multiplexed in a repetition of a transmission such as a physical uplink shared channel (PUSCH) transmission. A rule may be applied to indicate/determine which repetition, of a plurality of repetitions, comprises the multiplexed information. The rule may comprise including the multiplexed information in a transmission associated with at least one of: a lowest (or highest) frequency or range of frequencies, a lowest (or highest) starting (or ending) resource block, a lowest (or highest) transmission configuration indicator (TCI) state, a lowest (or highest) TCI state index, a lowest (or highest) panel or panel index, and/or any other parameter/indicator that may differentiate a transmission (including the multiplexed information) from other transmission(s).

Abstract: A wireless device may communicate with a base station by using overlapping transmissions. A transmission such as a physical uplink control channel (PUCCH) transmission (e.g., comprising uplink control information (UCI)) may be multiplexed in a repetition of a transmission such as a physical uplink shared channel (PUSCH) transmission. A rule may be applied to indicate/determine which repetition, of a plurality of repetitions, comprises multiplexed information (e.g., which PUSCH repetition comprises UCI).

Abstract: A wireless device may receive configuration parameters comprising a validity duration of a satellite ephemeris. The wireless device may also start a timer associated with the validity duration upon receiving the configuration parameters. In an embodiment, the wireless device may transmit, in an radio resource configuration (RRC) idle mode, an uplink signal via a preconfigured uplink resource in response to the timer associated with the validity duration of the satellite ephemeris running in the RRC idle mode.

Abstract: There is provided a method and user equipment (UE) for supporting device to device (D2D) communication, for example side link communication, of wireless devices. At least one of the source UE or the destination UE is out of synchronization. Side link (SL) communication information (e.g. SL sync signal, SL timing request message, SL-data, special sync signal) may be blindly and repeatedly transmitted until the source UE receives a response from the destination UE.

Abstract: There is provided a method and user equipment for a user equipment (UE) to perform device to device communication, for example sidelink communication. The method includes identifying, by a user equipment (UE), a time opportunity for the sidelink communication. The method further includes upon determination of a need for the sidelink communication, activating, by the UE, the sidelink communication during the time opportunity. In some embodiments, the method further includes the UE transmitting a sidelink availability message. In some embodiments, the time opportunity is at least in part dependent on the mode of operation of the UE.

Abstract: There are provided methods for predicting timing advance (TA) with respect to a base station. According to some embodiments, the method includes determining, by a user equipment (UE), a set of TAs, each TA corresponding to a particular distance from the base station and measuring, by the UE, a set of instances of a power metric, each instance of the power metric associated with a respective distance from the base station. The method further includes determining, by the UE, a set of differences between each of the instances of the power metric and determining, by the UE, a new TA at least in part using the set of TAs and the set of differences.

Abstract: There is provided methods and associated base station and user equipment, for facilitating transmissions in a wireless communication system. The mapping between an index and its corresponding HARQ ID or HARQ ID & NDI pair can be done using one or more equations relating the two entities. The equations can be defined in two configurations, one for encoding HARQ ID or HARQ ID & NDI pair and a second for decoding the encoded HARQ ID or HARQ ID & NDI pair to determine the HARQ ID or HARQ ID and NDI.

Abstract: There is provided a method and user equipment (UE) for supporting device to device (D2D) communication, for example side link communication, of wireless devices. At least one of the source UE or the destination UE is out of synchronization. Side link (SL) communication information (e.g. SL sync signal, SL timing request message, SL-data, special sync signal) may be blindly and repeatedly transmitted until the source UE receives a response from the destination UE.

Abstract: There is provided methods and associated base station and user equipment, for facilitating transmissions in a wireless communication system. The mapping between an index and its corresponding HARQ ID or HARQ ID & NDI pair can be done using one or more equations relating the two entities. The equations can be defined in two configurations, one for encoding HARQ ID or HARQ ID & NDI pair and a second for decoding the encoded HARQ ID or HARQ ID & NDI pair to determine the HARQ ID or HARQ ID and NDI.

Abstract: There is provided methods and associated base station and user equipment, for facilitating transmissions in a wireless communication system. The mapping between an index and its corresponding HARQ ID or HARQ ID & NDI pair can be done using one or more equations relating the two entities. The equations can be defined in two configurations, one for encoding HARQ ID or HARQ ID & NDI pair and a second for decoding the encoded HARQ ID or HARQ ID & NDI pair to determine the HARQ ID or HARQ ID and NDI.