Patent ID: 11903038
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Digital communication (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 8:
9. A terminal in a wireless communication system, the terminal comprising:
a transceiver configured to transmit and receive a signal; and
a controller configured to:
transmit, to a base station, a first random access preamble of a random access procedure,
identify that a random access response including an identifier of a random access preamble that matches an identifier of the transmitted first random access preamble is not received,
increase a preamble transmission counter based on the identification,
identify a preamble received target power for a second random access preamble of the random access procedure, and
transmit, to the base station, the second random access preamble based on the preamble received target power,

wherein the preamble received target power is identified based on an equation given by:
preamble received target power={initial preamble power+delta preamble+(a preamble power ramping counter−1)*preamble power ramping step},
wherein the preamble power ramping counter is increased in case that a transmission beam of the first random access preamble is not changed for the second random access preamble, and the preamble power ramping counter is maintained in case that the transmission beam of the first random access preamble is changed for the second random access preamble, and
wherein the delta preamble is a preamble format based power offset value and the preamble power ramping step is a power ramping factor.