Beam management for uplink transmission in wireless communication systems

A wireless device comprising:

• one or more processors;
• and
• memory storing instructions that, when executed by the one or more processors, cause the wireless device to:
• receive configuration parameters indicating that a default beam is used for uplink transmissions via physical uplink shared channel (PUSCH) resources;
• receive a downlink control information (DCI) indicating a first uplink transmission via a first PUSCH resource of the PUSCH resources;
• in response to the configuration parameters indicating that the default beam is used, determine, for the first uplink transmission, a spatial relation information of the default beam based on a downlink reference signal;
• and
• transmit a transport block via the first PUSCH resource and according to the spatial relation information.

A system comprising:

• a base station comprising:
• one or more first processors;
• and
• first memory storing first instructions that, when executed by the one or more first processors, cause the base station to:
• transmit configuration parameters indicating that a default beam is used for uplink transmissions via physical uplink shared channel (PUSCH) resources;
• and
• transmit a downlink control information (DCI) indicating a first uplink transmission via a first PUSCH resource of the PUSCH resources;
• and
• a wireless device comprising:
• one or more second processors;
• and
• second memory storing second instructions that, when executed by the one or more second processors, cause the wireless device to:
• receive, from the base station, the configuration parameters;
• receive the DCI indicating the first uplink transmission via the first PUSCH resource;
• in response to the configuration parameters indicating that the default beam is used, determine, for the first uplink transmission, a spatial relation information of the default beam based on a downlink reference signal;
• and
• transmit a transport block via the first PUSCH resource and according to the spatial relation information.