RADIO COMMUNICATION DEVICE, RADIO COMMUNICATION SYSTEM AND RADIO COMMUNICATION METHOD

• Main Authors: YASUMOTO HIROTO, SAITO NAOTOSHI, FUKUSHIMA KEISUKE, SAKATA MASAAKI, YOKOYAMA MUTSUTO, TAMURA ITARU, TAI TAKAHISA, YASUI MASAHIRO, SAKANO TAKAHIRO, INOKO TERUE, HOSHINO MITSUNORI, YAMASHITA MASUMI, TSUCHIYA SOTA, HATAKEUCHI TAKAAKI, ONO YUSUKE
• Format: Patent
• Language: English; Japanese
• Published: 01.10.2020
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; TRANSMISSION; WIRELESS COMMUNICATIONS NETWORKS

To select, in a radio communication device having a plurality of antennas, an appropriate antenna to be used for radio communication, regardless of the preamble signal length of a radio communication packet.SOLUTION: A selection unit 112 selects an antenna from among an antenna 111-1 to an antenna 111-N. Using the selected antenna, a radio communication unit 113 performs radio communication. The radio communication unit 113 receives a synchronization request from the radio communication device of a communication opposite party, using the first antenna, to transmit a transmission request to the radio communication device of the communication opposite party. Next, the selection unit 112 selects a second antenna, and the radio communication unit 113 receives a transmission request response from the radio communication device of the communication opposite party, using the second antenna. Next, the selection unit 112 selects an antenna having larger intensity between the received radio wave of the synchronization request and the received radio wave of the transmission request response, and using the selected antenna, the radio communication unit 113 transmits data to the radio communication device of the communication opposite party.SELECTED DRAWING: Figure 1 【課題】複数のアンテナを有する無線通信装置において、無線通信パケットのプリアンブル信号の長さにかかわらず、無線通信に用いる適切なアンテナを選択する。【解決手段】選択部１１２は、アンテナ１１１−１〜アンテナ１１１−Ｎの中からアンテナを選択し、無線通信部１１３は、選択されたアンテナを用いて、無線通信を行う。無線通信部１１３は、第１アンテナを用いて、通信相手の無線通信装置から同期要求を受信し、通信相手の無線通信装置へ送信要求を送信する。次に、選択部１１２は、第２アンテナを選択し、無線通信部１１３は、第２アンテナを用いて、通信相手の無線通信装置から送信要求応答を受信する。次に、選択部１１２は、同期要求の受信電波の強度と送信要求応答の受信電波の強度のうち、大きい方の強度を有するアンテナを選択し、無線通信部１１３は、選択されたアンテナを用いて、通信相手の無線通信装置へデータを送信する。【選択図】図１