Patent ID: 6400704
Filing Date: 2002-06-04
Classification: H04W

Abstract:
A control channel placement method applied to a wireless communication system, which wireless communication system having a base station having directional antennas that match placement angles of a plurality of sector cells performing communication in the TDMA-TDD mode with a plurality of terminal stations, and in which wireless communication system the up and down control channels for establishing communication by the base station with the terminal stations in each sector cell are placed in predetermined time slot positions within TDMA-TDD frames, the control channel placement method comprising:a reception level measurement step in which a reception level of each time slot extending over the TDMA-TDD frames corresponding to the number of sector cells of the base station is measured in each of the sector cells; a time slot extraction step in which time slots in which control channels can be placed are extracted from among the time slots extending over the TDMA-TDD frames corresponding to the number of sector cells, using a result of the measurement of the reception level in the reception level measurement step when a first sector cell was measured, and a result of the measurement of the reception level in the reception level measurement step when a second sector cell in a position opposite to the first sector cell was measured from among the sector cells; and a frame allocation step in which the TDMA-TDD frames are allocated for each sector cell such that those predetermined time slot positions in which control channels are placed, from among the time slots within the TDMA-TDD frames, are matched with time slots extracted in the time slot extraction step.