Abstract: A method comprises a wireless device transmitting a first preamble for a random-access procedure via a first bandwidth part of a cell and receiving a random-access response comprising a backoff indicator. The method also comprises the wireless device selecting, for transmission of a second preamble for the random-access procedure and during a backoff window associated with the backoff indicator, a second bandwidth part. Finally, based on the selection of the second bandwidth part the method comprises the wireless device transmitting via the second bandwidth part the second preamble.

Abstract: Wireless communication techniques using a power saving mode are described. A wireless device may be configured with a plurality of power saving configurations. A base station may transmit an indication of a power saving configuration in the plurality of power saving configurations. The wireless device may monitor a power saving channel based on the indicated power saving configuration.

Abstract: A wireless device receives configuration parameters of a cell. The cell comprises bandwidth parts (BWPs). The BWPs comprise a first active BWP. The configuration parameters comprise a timer value for a BWP inactivity timer. A first downlink control information (DCI) indicating an activation of the cell is received. In response to the first DCI indicating the activation of the cell: the first active BWP is activated; and the BWP inactivity timer is started based on the timer value. During the BWP inactivity timer running, a second DCI is received via the first active BWP.

Abstract: Wireless communications are described. A wireless device and/or a base station may determine/select one or more beams for transmission of signals (e.g., sounding reference signals, SRSs) in one or more cells. The wireless device and/or the base station may determine/select a beam based on one or more of: cell indicators of a first cell and/or a second cell, antenna panel indicators associated with SRS transmissions, priorities of SRS transmissions, resource set indicators corresponding to the SRS transmissions, and/or other information.

Abstract: Wireless communications are described for access procedures. A wireless device may use a plurality of identifiers to monitor for a response from a base station. The wireless device may determine whether a random access procedure is a success or a failure based on the identifier that the wireless device is able to use to receive the response.

Abstract: A wireless device receives RRC message(s) comprising: a first maximum value for a preamble transmission counter; and a second maximum value for a second counter. The second maximum value is different from the first maximum value. A control order initiating a random access procedure on a first unlicensed cell is received. A listen-before-talk (LBT) procedure for transmission of a preamble for the random access procedure is performed. Based on the LBT procedure indicating an LBT failure for transmission of the preamble for the random access procedure: a value of the preamble transmission counter is keep the same; and a value of the second counter based on the LBT failure is incremented. The preamble transmission counter counts a number of preamble transmissions. The random access procedure is cancelled based on either the preamble transmission counter reaching the first maximum value or the second counter reaching the second maximum value.

Abstract: A wireless device may communicate with multiple base stations via different cell groups. A listen-before-talk (LBT) procedure may be performed. Based on a failure of the LBT procedure, a base station may be reconfigured.

Abstract: Wireless communications are described. A base station may send control information for scheduling data to be transmitted to the wireless device via a downlink. The control information may comprise one or more indications of wireless resources to be used by the wireless device to receive the data. The wireless device may receive the data based on one or more determinations/conditions, such as satisfying a time offset (e.g., between reception of the downlink information and a scheduled transmission of the data), whether a control resource set is configured to indicate a transmission configuration state, and/or whether the control information indicates a transmission configuration state.

Abstract: A wireless device may perform a listen-before transmit (LBT) procedure for an uplink transmission. An LBT failure recovery procedure may be initiated based on a failure of one or more LBT procedures. The LBT failure recovery procedure may be aborted and/or canceled based on one or more conditions, such as receiving configuration (or reconfiguration) parameters, receiving an indication of a bandwidth part switching, deactivating a cell, and/or receiving a request to set (or reset) a communication layer of the wireless device.

Abstract: Uplink resources for semi-persistent channel state information (SP-CSI) reports and other uplink transport block transmissions may be managed. If resources allocated to the SP-CSI reports overlap, in time, with resources allocated to the uplink transport block transmissions, a determination of whether to drop an SP-CSI report may be made. Various selection criteria may be used to make this determination.

Abstract: A wireless device receives configuration parameters of: one or more first cells in a first frequency band; and one or more second cells in a second frequency band. A physical uplink shared channel (PUSCH) signal in the first frequency band is transmitted via the one or more first cells. The wireless device determines, independent of transmissions of the PUSCH signals in the first frequency band, whether to transmit or to drop a configured transmission of at least one sounding reference signal (SRS) via the one or more second cells of the second frequency band. The configured transmission of the at least one SRS overlaps with the PUSCH signal. Based on the determination: the at least one SRS are transmitted via a second cell of the one or more second cells; or the at least one SRS is dropped.

Abstract: A wireless device transmits, via a first uplink bandwidth part (BWP), a first preamble for a random-access procedure. A determination is made of a second uplink BWP for transmission of a second preamble for the random-access procedure. The determination is based on not receiving, via a first downlink BWP associated with the first uplink BWP, a random-access response corresponding to the first preamble. Based on the determination of the second uplink BWP, the first downlink BWP is switched to a second downlink BWP associated with the second uplink BWP. The second preamble is transmitted via the second uplink BWP.

Abstract: A wireless device transmits a Type 2 power headroom value, for a primary cell, in response to a physical uplink control channel (PUCCH) secondary cell being activated.

Abstract: Wireless communications using multiple active resources (e.g., bandwidth parts (BWP)) are described. A predetermined rule may be used to determine on which downlink (DL) BWP of multiple active DL BWPs, and/or on which uplink (UL) BWP of multiple active UL BWPs, a message is to be sent. A wireless device and/or a base station may reduce the quantity of active DL BWPs and/or active UL BWPs to monitor for a response.

Abstract: A first base station receives, from a second base station, cell configuration parameters of one or more cells of the second base station, the cell configuration parameters indicating at least one first information element (IE) indicating a first identifier of a first cell of the one or more cells, at least one second IE indicating that the first cell is an unlicensed cell, and at least one third IE indicating a radio frequency channel number of the unlicensed cell. The first base station sends, to the second base station, a request message for adding the second base station as a secondary base station for a wireless device after receiving the cell configuration parameters.

Abstract: A wireless device monitors a downlink control channel of a transmission reception point (TRP) on an active bandwidth part (BWP) of a cell, where the TRP is in an active state. First channel state information reports of the TRP for the active BWP are transmitted. The TRP transitions from the active state into a dormant state in response to a first time period of inactivity on the TRP. The monitoring is stopped. Second channel state information reports of the TRP for the active BWP are transmitted when the TRP is in the dormant state.

Abstract: Wireless communications for a sidelink are described. A wireless devices and/or a base station may determine at least one resource and/or time period for communications via a sidelink. The base station and/or the wireless device may schedule sidelink communication, based on the determined resource(s) and/or time period(s), which may increase the likelihood of successful sidelink communications between wireless devices.

Abstract: Base stations and wireless devices may use cross-slot scheduling for each of a plurality of cells. Base stations and wireless devices may communicate regarding the cross-slot scheduling, including for example, one or more indications associated with cross-slot scheduling for one or more cells. A wireless device may determine cross-slot scheduling for one or more transmissions associated with the one or more cells. The wireless device may save power by switching to a power saving mode for at least one cell during one or more slots, based on the cross-slot scheduling.

Abstract: A base station and/or a wireless device may communicate using a plurality of transmission beams. Multiple transmission beams may be used for transmission such that a message may be sent via different transmission beams. Multiple transmission beams may be used for sending multiple repetitions of the message or for sending different portions of the message.

Abstract: Wireless devices may communicate via a plurality of transmission and/or reception beams. Control information may be used to indicate one or more beams to be used by wireless devices. A configuration message may indicate a portion of the control information corresponding to a particular wireless device of the wireless devices.