Patent ID: 11968135
Assignee: NOKIA TECHNOLOGIES OY
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 16:
17. A non-transitory computer readable medium comprising computer-executable instructions that, when executed by one or more processors, cause the one or more processors to perform the following operations:
receiving an indication that uplink transmissions to secondary cells are allowed during a connection establishment procedure;
determining that a connection with carrier aggregation is needed;
initiating the connection establishment procedure by transmitting a random access preamble to a primary cell;
receiving, from the primary cell in response to the random access preamble, a random access response comprising a grant of uplink resources;
obtaining an uplink transmission configuration comprising information on a secondary cell candidate frequency from the random access response;
transmitting a signal in the uplink in the secondary cell candidate frequency to a secondary cell; as a result of the random access response, transmitting a signal in the uplink in accordance with the uplink transmission configuration on the secondary cell candidate frequency to a secondary cell, during a connection establishment procedure which transitions an apparatus from an idle mode to a connected mode such that the primary cell and the secondary cell establish the signal strength of the uplink signal to determine secondary cell configuration for the carrier aggregation; and
based on the signal strength, receiving a carrier aggregation configuration from a network.