Beam division multiple access system and method for mobile communication system

A beam division multiple access system in a mobile station of a mobile communication system, comprising:

• a mobile station location and speed detector for detecting a current location and moving speed of a mobile station;
• an initial mobile station information transmitter for omnidirectionally transmitting initial mobile station information comprising the current location and moving speed of the mobile station to a base station;
• a downlink beam receiver for receiving a downlink beam from the base station;
• an uplink beam generator for tracking a direction of the downlink beam received by the downlink beam receiver and generating an uplink beam;
• and
• an uplink beam transmitter for transmitting the uplink beam generated by the uplink beam generator to the base station.

A beam division multiple access method in a base station of a mobile communication system, comprising the steps of:

• (a) receiving initial mobile station information that a mobile station omnidirectionally transmits in an initial communication step;
• (b) detecting a location and a moving speed of the mobile station from the initial mobile station information received in the step (a);
• (c) generating a downlink beam based on the location and the moving speed of the mobile station detected in the step (b), and adjusting at least one of a width and a direction of each the downlink beam;
• and
• (d) transmitting the downlink beam generated in the step (c) to the mobile station through a phase array antenna.

A beam division multiple access method in a mobile station of a mobile communication system, comprising the steps of:

• (a) detecting a current location and moving speed of a mobile station;
• (b) omnidirectionally transmitting initial mobile station information comprising the current location and moving speed of the mobile station to a base station;
• (c) receiving a downlink beam from the base station;
• (d) tracking a direction of the downlink beam received in the step (c) and generating an uplink beam;
• and
• (e) transmitting the uplink beam generated in the step (d) to the base station.