ANTENNA CONTROL DEVICE AND ANTENNA CONTROL SYSTEM

To provide an antenna control device that gives an indoor antenna a directivity control function to achieve stable communication with a wireless terminal, even in a case where RoF (Radio-over-Fiber) is applied to an existing communication standard utilizing an electric wave of a high-frequency band.SOLUTION: An antenna control device comprises: a communication state analysis unit that calculates a difference between the number of times of switching directivity of a second antenna which directly communicates by radio with a wireless terminal not directly communicating by radio with a base station, and the number of times of transmitting an uplink control signal before the second antenna and the wireless terminal communicate data, and that, thereby, analyzes a communication state of the second antenna; a link control unit, in a case where the number of times of transmitting the uplink control signal is smaller than the number of times of switching the directivity of the second antenna, re-transmits the uplink control signal from the wireless terminal to the second antenna the number of times equivalent to the difference; and a directivity control unit that controls the directivity of the second antenna toward a direction with the maximum reception level of the uplink control signal.SELECTED DRAWING: Figure 4 【課題】既存の高周波数帯の電波を利用する通信規格にＲｏＦを適用した場合であっても、屋内アンテナに指向性制御機能を付与可能となり、無線端末と安定した通信ができるアンテナ制御装置等を提供すること。【解決手段】基地局と直接無線通信しない無線端末と直接無線通信する第二アンテナの指向性の切り替え回数と、第二アンテナと無線端末とがデータ通信する前のアップリンク制御信号の送信回数との差分回数を演算し、第二アンテナの通信状況を解析する通信状況解析部と、アップリンク制御信号の送信回数が、第二アンテナの指向性の切り替え回数よりも少ない場合には、差分回数だけ、無線端末から第二アンテナへのアップリンク制御信号を再送させるリンク制御部と、アップリンク制御信号を受信した場合の受信レベルが最大の方向に第二アンテナの指向性を制御する指向性制御部と、を含む。【選択図】図４