Ofinno, LLC

Fasil Abdul Latheef

Taehun Kim

Esmael Hejazi Dinan

Hyoungsuk Jeon

Jian Xu

Gautham Prasad

A wireless device receives, from a base station, a UE capability enquiry message and transmits a UE capability information message indicating a maximum number of candidate cells for ETA. The UE receives, from the base station, an RRC reconfiguration message comprising a LTM configuration comprising a first configuration for layer 1 measurement reporting, a second configuration of resource, for the layer 1 measurement reporting, and a configuration for a candidate cell. The UE transmits, to the base station and based on the first configuration and the second configuration, a layer 1 measurement report and receives, from the base station, a downlink control information indicating the candidate cell for ETA. The UE transmits via the candidate cell a random access preamble for ETA, receives a cell switch command, for LTM, indicating the configuration of the candidate cell and a TA value of the candidate cell, and applies the configuration of the candidate cell and transmits, based on the TA value and via the candidate cell, a physical uplink shared channel (PUSCH).

Early timing advance acquisition

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.

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Dresden, Germany

Fasil Abdul Latheef