Abstract: A wireless device may request system information, such as a system information block, from a base station on demand. The base station may indicate to the wireless device a change in system information via a message, for example, during a time period that the base station is not sending system information to the wireless device. The wireless device may expect to receive updated system information, for example, based on receiving the message, without having to send a request to the base station for system information.

Abstract: A wireless device receives, via a serving cell, one or more radio resource control (RRC) messages comprising configuration parameters of a candidate cell for a layer 1/2 triggered mobility (LTM) procedure. The configuration parameters indicate a transmission power of a synchronization signal block (SSB) transmitted via the candidate cell. The wireless device receives a physical downlink control channel (PDCCH) order comprising a cell indicator indicating the candidate cell, an SSB index indicating the SSB of SSBs of the candidate cell, and a preamble index of a preamble. The wireless device transmits, via a physical random access channel (PRACH) occasion corresponding to the SSB of the candidate cell, the preamble using an uplink transmission power based on a measurement of a pathloss. The pathloss is determined based on the transmission power of the SSB, and a layer 3 filtered reference signal received power (RSRP) of the SSB.

Abstract: A wireless device receives a layer 1 or layer 2 triggered mobility (LTM) cell switch command. The LTM cell switch command comprises a configuration index indicating a cell for an LTM procedure and does not comprise a timing adjustment value for a primary timing advance group (PTAG) of the cell. In response to receiving the LTM cell switch command with no timing adjustment value, the wireless device starts a time alignment timer associated with the PTAG after measuring a timing advance of the cell.

Abstract: A wireless device receives a first configured grant (CG) configuration, associated with a first CG index, comprising one or more parameters indicating to disable: monitoring for retransmissions corresponding to the first CG configuration; and starting a discontinuous reception (DRX) hybrid automatic repeat request (HARQ) round trip time (RTT) timer for a HARQ process associated with a transport block (TB) transmitted via a CG resource indicated by the first CG configuration. The wireless device receives a second CG configuration not associated with the first CG index. Based on the first CG configuration, the wireless device does not start a first DRX HARQ RTT timer for a first HARQ process, and based on the second CG configuration, the wireless device starts a second DRX HARQ RTT timer for a second HARQ process.

Abstract: A method can include determining, by a wireless device, a first plurality of repetitions of a first preamble scheduled for transmission for a random-access procedure. The method can also include suspending, by a wireless device, a power-ramping counter of a random-access procedure based on not transmitting each repetition of a first plurality of repetitions of a first preamble of the random-access procedure. The method can further include transmitting, by the wireless device, a second preamble with a transmit power that is determined based on the power-ramping counter for the random-access procedure.

Abstract: A wireless device may receive one or more messages indicating at least two timing advance groups (TAGs) for a cell, wherein each TAG of the at least two TAGs is associated with a respective transmission configuration indicator (TCI) state. A wireless device may receive downlink control information (DCI). The DCI may indicate a semi-persistent scheduling (SPS) deactivation and an uplink resource of a hybrid automatic repeat request acknowledgement (HARQ-ACK) feedback. The wireless device may indicate, to a physical layer of the wireless device, a positive acknowledgement for the SPS deactivation in response to a time alignment timer of a TAG, among the at least two TAGs and associated with a TCI state used for transmitting the HARQ-ACK feedback, being running. The wireless device may transmit, via the cell and based on the TCI state, the HARQ-ACK feedback comprising the positive acknowledgement.

Abstract: A wireless device drops sounding reference signal (SRS) transmissions, in SRS resources linked for bandwidth aggregation, that conflict in time with a transmission or a reception scheduled by downlink control information (DCI). A time period between a last symbol of the DCI and a starting symbol of the SRS transmissions is equal to, or greater than, a number of symbols plus a guard period of the bandwidth aggregation.

Abstract: A method can include receiving, by a wireless device, configuration parameters of a serving cell with a first physical cell identity (PCI) and an additional PCI. The configuration parameters can indicate a first timing advance group (TAG), of the serving cell, associated with a first transmission configuration indication (TCI) state; a second TAG, of the serving cell, associated with a second TCI state; a first set of random access (RA) resources associated with the first PCI of the serving cell; and a second set of RA resources associated with the additional PCI of the serving cell. The method can also include receiving a physical downlink control channel (PDCCH) order triggering an RA procedure and transmitting, via an RA resource selected from the second set of RA resources, a RA preamble for the RA procedure.

Abstract: A wireless device drops sounding reference signal (SRS) transmissions, in SRS resources linked for bandwidth aggregation, that conflict in time with a transmission or a reception scheduled by downlink control information (DCI). A time period between a last symbol of the DCI and a starting symbol of the SRS transmissions is equal to, or greater than, a number of symbols plus a guard period of the bandwidth aggregation.

Abstract: One or more parameters may be used to configure wireless communications between a wireless device and a base station. Configuration parameters may indicate SRS resources for sounding reference signal (SRS) bandwidth aggregation of component carriers. A capability message may indicate wireless device transmission and/or reception capability for one or more bands during a guard period of SRS bandwidth aggregation. At least some component carriers may lack an uplink channel and downlink transmission may not be received during the guard period, for example, based on the capability message indicating simultaneous transmission and reception is not supported for one or more bands.

Abstract: A wireless device and a base station may use configuration parameters, comprising transmission configuration indicator states, to communicate. A transmission configuration indicator codepoint, for application of one or more transmission configuration indicator states of each cell among a plurality of cells, may be indicated dynamically, for example, by downlink control information. A default rule may be applied to determine a transmission configuration state, among the one or more indicated transmission configuration states of a cell, to use for communication. A first (or last) listed transmission configuration state, a transmission configuration state having a lowest (or highest) index, and/or a transmission configuration indicator state indicated by a default parameter and/or a default procedure, among at least two transmission configuration states, for example, may be selected for use.

Abstract: A wireless device can receive configuration parameters indicating a first timing advance group (TAG) for a cell and a second TAG for the cell. The first TAG may be a primary TAG (PTAG). A first time alignment timer (TAT) associated with the first TAG can expire. In response to the expiry of the first TAT, the wireless device may set the second TAG as the PTAG. The wireless device may further transmit uplink signals via the cell.

Abstract: A wireless device may communicate with a base station. The wireless device may request system information associated with a cell. The cell may be determined to be unavailable, for example, based on system information associated with the cell not being provided after a request for it is made.

Abstract: One or more parameters may be used to configure wireless communications between a wireless device and a base station. A transmission configuration indication selection field may indicate which of two (or more) resources is to be used for a transmission/reception. A transport block size for a transmission occasion may be determined using one of the resources, and the same transport block size may be used for another transmission occasion using another of the resources, for example, if the transmission configuration indication selection field indicates using two resources or if the transmission configuration indication selection field is absent.

Abstract: A method can include transmitting, by a base station via a first cell, a first physical downlink control channel (PDCCH) order initiating a first random access (RA) procedure on a second cell. The method can also include receiving a first RA preamble, for the first RA procedure, transmitted using a preamble power ramping counter. The method can further include transmitting, after the first RA procedure is complete, a second PDCCH order initiating a second RA procedure on a third cell; wherein in response the second RA procedure being initiated on the third cell and based on the second cell and the third cell being different, the preamble power ramping counter is initialized with an initial value. The method can further include receiving, via the third cell and for the second RA procedure, a second random access preamble transmitted using the initial value.

Abstract: A method can include transmitting, by a wireless device, a capability message comprising a field indicating a time gap of the wireless device to complete a procedure of layer 1 or layer 2 triggered mobility (LTM). The method can also include receiving, in a time interval, a medium access control control element (MAC CE) indicating cell switch to a candidate cell of LTM. The method can further include transmitting, via the candidate cell and a time resource, an uplink transmission, wherein the time resource is after the time gap plus an offset from the time interval.

Abstract: A wireless device may communicate with a base station using transmission occasions. A number of transmission occasions for a transmission/reception may be indicated by a field and/or by an absence of a field in a message that schedules transmission/reception. For example, two physical downlink shared channel transmission occasions may be used, for scheduled transmission/reception, based on a value in a transmission configuration indicator selection field and/or based on an absence of such a field in a message.

Abstract: One or more parameters may be used to configure wireless communications between a wireless device and a base station. A resource may be configured for sounding reference signal transmission/reception between a wireless device and a base station. Transmission power for a sounding reference signal transmission may be based on one or more configuration parameters. A virtual bandwidth part for positioning frequency hopping may be used when frequency hopping takes place outside an active bandwidth part. The transmission power may be based on the virtual bandwidth part.

Abstract: Configuration parameters sent to a wireless device may indicate resources (and a repetition scheme that the wireless device may use for communication. An activation command, scheduling a reception, may indicate to use at least two transmission configuration states for the scheduled reception. The wireless device may use the indicted two transmission and a configured repetition scheme to receive the scheduled reception.

Abstract: A wireless device may indicate one or more capabilities or lack thereof in one or more capability messages. The wireless device may indicate, for example, that the wireless device is not capable of switching between resources, is not capable of supporting a reception scheme, and/or is configured with a particular reception scheme. Based on the wireless device indication(s), a control message may be used to direct the wireless device to schedule reception using at least two resources.