Apparatus and method for random access in wireless communication system using beamforming

A terminal in a wireless environment comprising:

• a transceiver configured to:
• receive, from a base station (BS), one or more downlink (DL) transmit (Tx) signal comprising one or more set of one or more synchronization signal and one or more broadcast signal, and
• receive, from the BS, configuration information indicating a first configured number of at least one set of at least one synchronization signal and at least one broadcast signal transmitted via at least one DL Tx signal mapped to each random access channel (RACH) opportunity, wherein the configuration information further indicates a second configured number of RACH preambles for each DL Tx signal;
• and
• at least one processor, operably coupled to the transceiver, configured to determine a RACH opportunity corresponding to a set of a synchronization signal and a broadcast signal transmitted via a DL Tx signal from among the one or more set based on the configuration information,
• wherein the transceiver is further configured to transmit, to the BS, a RACH preamble through the determined RACH opportunity.

A base station (BS) in a wireless environment comprising:

• at least one processor;
• and
• a transceiver, operably coupled to the at least one processor, configured to:
• transmit, to a terminal, at least one downlink (DL) transmit (Tx) signal comprising at least one set of at least one synchronization signal and at least one broadcast signal, and
• receive, from the terminal, a random access channel (RACH) preamble through a RACH opportunity corresponding to a set of a synchronization signal and a broadcast signal,
• wherein the RACH opportunity is determined based on configuration information indicating a first configured number of at least one set of at least one synchronization signal and at least one broadcast signal transmitted via at least one DL Tx signal mapped to each RACH opportunity, wherein the configuration information further indicates a second configured number of RACH preambles for each DL Tx signal, and
• wherein the configuration information is transmitted by the BS through the transceiver to the terminal.