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

Claim 12:
13. A base station in a wireless communication system, the base station comprising:
a transceiver configured to transmit and receive a signal; and
a controller configured to:
receive, from a terminal, a first random access preamble of a random access procedure, and
receive, from the terminal, a second random access preamble of the random access procedure based on a preamble received target power,

wherein a preamble transmission counter is increased in case that a random access response including an identifier of a random access preamble that matches an identifier of the first random access preamble is not transmitted,
wherein the preamble received target power is 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.