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    WIRELESS COMMUNICATION DEVICE AND WIRELESS COMMUNICATION SYSTEM
    1.
    发明公开
    WIRELESS COMMUNICATION DEVICE AND WIRELESS COMMUNICATION SYSTEM 审中-公开
    无线通信设备和无线通信系统

    公开(公告)号：EP2383895A1

    公开(公告)日：2011-11-02

    申请号：EP09834515.0

    申请日：2009-12-25

    申请人： Panasonic Corporation

    发明人： SUWA, Yutaka ,  ISHIHARA, Hiroyuki

    IPC分类号： H03M7/38 ,  G10L19/00 ,  H04L1/00 ,  H04M1/00 ,  H04M1/725

    CPC分类号： H04L1/0009 ,  G10L19/005 ,  H04L1/0014 ,  H04L1/0061

    摘要： The present invention provides a wireless communication device and a wireless communication system which can improve the error detection accuracy with the sound quality maintained to some extent even if the communication environment is deteriorated. A cordless phone establishes a digital link on a wireless channel between a master device and a slave device, compresses a sound signal in an ADPCM scheme, and carries the sound signal in a sound packet to perform communication. In a master device side, a PCM signal is converted into ADPCM data by an ADPCM encoding unit. Next, the least significant bit of n-bits is set according to the number of "1" of the n-bits of the ADPCM data by a transmission conversion table. In a slave device side, it is determined whether an error has occurred according to the number of "1" of the n-bit data in received data. If the error exists, the n-bit sound data is converted into mute data through a reception conversion table. The sound data converted through the reception conversion table is converted into a PCM signal from an ADPCM format by an ADPCM decoding unit.

    摘要翻译： 本发明提供一种无线通信装置和无线通信系统，即使通信环境恶化，也可以在一定程度上保持声音质量的情况下提高错误检测精度。 无绳电话在主设备和从设备之间的无线信道上建立数字链路，以ADPCM方案压缩声音信号，并将该声音信号携带在声音分组中以执行通信。 在主设备侧，通过ADPCM编码单元将PCM信号转换成ADPCM数据。 接下来，通过发送转换表根据ADPCM数据的n位的“1”的数目来设置n位的最低有效位。 在从装置侧，根据接收到的数据中的n位数据的“1”的个数来判断是否发生了错误。 如果存在错误，则通过接收转换表将n位声音数据转换为静音数据。 通过接收转换表转换的声音数据由ADPCM解码单元从ADPCM格式转换成PCM信号。

    WIRELESS COMMUNICATION SYSTEM AND WIRELESS COMMUNICATION DEVICE
    4.
    发明公开
    WIRELESS COMMUNICATION SYSTEM AND WIRELESS COMMUNICATION DEVICE 有权
    DRAHTLOSES KOMMUNIKATIONSSYSTEM UND DRAHTLOSE KOMMUNIKATIONSVORRICHTUNG

    公开(公告)号：EP2624639A1

    公开(公告)日：2013-08-07

    申请号：EP11840041.5

    申请日：2011-11-10

    申请人： Panasonic Corporation

    发明人： SUWA, Yutaka ,  ISHIHARA, Hiroyuki ,  SHIBUTA, Akira ,  SUWA, Konomi

    IPC分类号： H04W56/00 ,  H04W74/08 ,  H04W84/12

    CPC分类号： H04W74/0816 ,  H04B7/2643 ,  H04W16/14 ,  H04W52/0216 ,  H04W56/0015 ,  H04W88/06 ,  H04W88/10 ,  Y02D70/1222 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/449

    摘要： In a system that conducts a WiFi communication, if plural terminals are present, timing when the terminals communicate with the base station collides with each other, and it becomes necessary to wait for transmitting data, or a time during which a receiving unit of the terminals is active becomes long to deteriorate a power saving efficiency. According to the present invention, a DECT communication unit and a WiFi communication unit are both provided in each base station, one of a plurality of base stations is configured as a master base station, a timing of the DECT communication of each base station is synchronized with each other according to a control signal transmitted by the DECT communication unit in the master base station, and each base station corrects a timer of the WiFi communication unit according to timer information notified by a control signal of the DECT. As a result, each terminal can precisely predict the transmission timing of the WiFi beacon issued by each base station, and reduce the receiving operation to a minimum time as required.

    摘要翻译： 在进行WiFi通信的系统中，如果存在多个终端，则终端与基站通信的定时相互冲突，需要等待发送数据，或者等待终端的接收单元的时间 积极变得长时间来降低节电效率。 根据本发明，在每个基站中都设置DECT通信单元和WiFi通信单元，多个基站中的一个被配置为主基站，每个基站的DECT通信的定时被同步 根据由主基站中的DECT通信单元发送的控制信号，每个基站根据由DECT的控制信号通知的定时器信息来校正WiFi通信单元的定时器。 结果，每个终端可以精确地预测每个基站发出的WiFi信标的发送定时，并根据需要将接收操作减少到最小时间。