Method and apparatus for random access in communication system with large number of antennas

A method for performing random access by a Base Station (BS) in a wireless network, the method comprising:

• receiving a random access signal on at least one User Equipment (UE) transmit beam from a UE;
• configuring at least one downlink transmit (DL TX) beam for transmitting a response to the random access signal;
• and
• transmitting the response to the random access signal to the UE on the at least one DL TX beam.

A user equipment for performing random access in a wireless network, the User Equipment (UE) comprising a processing circuit configured to:

• configure at least one UE transmit beam for a transmission of a random access signal;
• generate the at least one UE transmit beam using an antenna array according to the configuration;
• and
• transmit the random access signal to the Base Station (BS) on the at least one UE transmit beam.

A base station for performing random access by a Base Station (BS) in a wireless network, the BS comprising a processing circuit configured to:

• receive a random access signal on at least one User Equipment (UE) transmit beam from a UE;
• configure at least one downlink transmit (DL TX) beam for transmitting a response to the random access signal;
• and
• transmit the response to the random access signal to the UE on the at least one DL TX beam.