Ofinno, LLC

Gautham Prasad

Esmael Hejazi Dinan

Hua Zhou

Ali Cagatay Cirik

Hyoungsuk Jeon

Taehun Kim

Ryan Keating

Hsin-Hsi Tsai

Fasil Abdul Latheef

Mohammad Ghadir Khoshkholgh Dashtaki

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.

Maintenance of multiple timing advance groups

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.

Collision timeline for bandwidth aggregation

A method can include receiving, by a wireless device 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 transmitting a first RA preamble, for the first RA procedure, using a preamble power ramping counter. The method can further include receiving, after the first RA procedure is complete, a second PDCCH order initiating a second RA procedure on a third cell. The method can additionally include, in response to initiating the second RA procedure on the third cell, initializing, based on the second cell and the third cell being different, the preamble power ramping counter with an initial value. The method can also include transmitting, after initializing the preamble power ramping counter, a second random access preamble, for the second RA procedure, via the third cell.

Random access initialization during mobility

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Herndon, VA, United States of America

Gautham Prasad