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    MULTI-LEVEL RADIO-FREQUENCY COMMUNICATION SYSTEM
    2.
    发明公开
    MULTI-LEVEL RADIO-FREQUENCY COMMUNICATION SYSTEM 失效
    MULTINIVEAURADIOKOMMUNIKATIONSSYSTEM。

    公开(公告)号：EP0494298A1

    公开(公告)日：1992-07-15

    申请号：EP91914315.0

    申请日：1991-07-24

    申请人： NORAND CORPORATION

    发明人： KOENCK, Steven, E. ,  BUNTE, Alan, G. ,  CARGIN, Keith, K., Jr. ,  HANSON, George, E. ,  MAHANY, Ronald, L. ,  MILLER, Phillip ,  SALVAY, Steven, H.

    IPC分类号： G06F1 ,  G06K7 ,  G06K17 ,  H01Q1 ,  H04L1 ,  H04L12 ,  H04W88 ,  H04M7 ,  H04W28 ,  H04W40

    CPC分类号： H04W88/02 ,  G06F1/1626 ,  G06F1/163 ,  G06F1/1632 ,  G06F1/1684 ,  G06F1/1698 ,  G06F1/28 ,  G06F2200/1632 ,  G06K7/10574 ,  G06K7/10584 ,  G06K7/10702 ,  G06K7/10722 ,  G06K7/10732 ,  G06K7/10811 ,  G06K7/10841 ,  G06K7/10851 ,  G06K7/10881 ,  G06K7/12 ,  G06K17/0022 ,  G06K2017/0051 ,  H04B2001/3894 ,  H04L2001/0097 ,  H04M7/006 ,  H04W28/14 ,  H04W40/00 ,  H04W88/04 ,  H04W88/06 ,  Y02D70/1222 ,  Y02D70/1262 ,  Y02D70/142

    摘要： A digital data communication system enables host computer to communicate with a great number of data terminals having specified functions. Communication from the host computer proceeds through a medium or long distance, high power transceiver and through a multiplex system to one of a number of portable communication devices. The communication devices preferably contain internal power supplies, such as rechargeable NiCad battery packs. The devices may be carried on a person's belt, or may be mounted within or on a service vehicle, for example, a forklift truck for use in warehouse operations or a merchandise delivery route vehicle. The communication devices are adapted to function as communication relay devices between the host computer and selected ones of the data terminals. Each communication device includes a first type, low power transceiver to communicate within a first channel and at a low power transmission level with a selected number of the data terminals which also feature such first type transceivers. Each communication device further includes a high power transceiver to communicate within a second channel with the transceiver of the host computer. A microprocessor operated address controller allows the communication device to control low power communication among the data terminals by receiving and re-transmitting locally directed communications. The controller and the controlling protocol further relays data messages between the low power communication level and host computer. In operation the device receives data messages on one of the transceivers and transmits them on the other. The communication device further may contain sufficient memory capacity to permit periodic batch type data transmission between the host computer and the communication device. The ability to switch from a high power, high precision and high cost transmission system to a low power, low precision and low cost transmission system at the level at which a great number of data terminal devices are used provides system flexibility at a reasonable cost.

    摘要翻译： 数字数据通信系统使得主机能够与具有指定功能的大量数据终端进行通信。 来自主计算机的通信通过中长距离，大功率收发器和通过多路复用系统进行到多个便携式通信设备之一。 通信设备优选地包含诸如可充电NiCad电池组的内部电源。 这些装置可以携带在人的皮带上，或者可以安装在服务车辆内或其上，例如用于仓库操作的叉车或商品运送路线车辆。 通信设备适于在主计算机和所选择的数据终端之间用作通信中继设备。 每个通信设备包括第一类型的低功率收发器，用于在第一通道内以低功率传输级别与选定数量的数据终端进行通信，该数据终端还具有这种第一类型的收发器。 每个通信设备还包括大功率收发器，以在第二信道内与主计算机的收发器进行通信。 微处理器操作的地址控制器允许通信设备通过接收和重新发送本地定向的通信来控制数据终端之间的低功率通信。 控制器和控制协议进一步在低功率通信级别和主机之间中继数据消息。 在操作中，设备在其中一个收发器上接收数据消息，并在另一个收发器上传送它们。 通信设备还可以包含足够的存储器容量以允许主计算机和通信设备之间的周期性批量类型数据传输。 从大功率，高精度和高成本传输系统切换到低功耗，低精度和低成本传输系统的能力，在大量数据终端设备的使用水平上，以合理的成本提供了系统灵活性。

    MULTI-LEVEL RADIO-FREQUENCY COMMUNICATION SYSTEM
    4.
    发明授权
    MULTI-LEVEL RADIO-FREQUENCY COMMUNICATION SYSTEM 失效
    MULTINIVEAURADIOKOMMUNIKATIONSSYSTEM

    公开(公告)号：EP0494298B1

    公开(公告)日：1997-06-04

    申请号：EP91914315.6

    申请日：1991-07-24

    申请人： NORAND CORPORATION

    发明人： KOENCK, Steven, E. ,  BUNTE, Alan, G. ,  CARGIN, Keith, K., Jr. ,  HANSON, George, E. ,  MAHANY, Ronald, L. ,  MILLER, Phillip ,  SALVAY, Steven, H.

    IPC分类号： H04B7/15 ,  G07G1/14 ,  G08C17/00

    CPC分类号： H04W88/02 ,  G06F1/1626 ,  G06F1/163 ,  G06F1/1632 ,  G06F1/1684 ,  G06F1/1698 ,  G06F1/28 ,  G06F2200/1632 ,  G06K7/10574 ,  G06K7/10584 ,  G06K7/10702 ,  G06K7/10722 ,  G06K7/10732 ,  G06K7/10811 ,  G06K7/10841 ,  G06K7/10851 ,  G06K7/10881 ,  G06K7/12 ,  G06K17/0022 ,  G06K2017/0051 ,  H04B2001/3894 ,  H04L2001/0097 ,  H04M7/006 ,  H04W28/14 ,  H04W40/00 ,  H04W88/04 ,  H04W88/06 ,  Y02D70/1222 ,  Y02D70/1262 ,  Y02D70/142

    摘要： A digital data communication system enables host computer to communicate with a great number of data terminals having specified functions. Communication from the host computer proceeds through a medium or long distance, high power transceiver and through a multiplex system to one of a number of portable communication devices. The communication devices preferably contain internal power supplies, such as rechargeable NiCad battery packs. The devices may be carried on a person's belt, or may be mounted within or on a service vehicle, for example, a forklift truck for use in warehouse operations or a merchandise delivery route vehicle. The communication devices are adapted to function as communication relay devices between the host computer and selected ones of the data terminals. Each communication device includes a first type, low power transceiver to communicate within a first channel and at a low power transmission level with a selected number of the data terminals which also feature such first type transceivers. Each communication device further includes a high power transceiver to communicate within a second channel with the transceiver of the host computer. A microprocessor operated address controller allows the communication device to control low power communication among the data terminals by receiving and re-transmitting locally directed communications. The controller and the controlling protocol further relays data messages between the low power communication level and host computer. In operation the device receives data messages on one of the transceivers and transmits them on the other. The communication device further may contain sufficient memory capacity to permit periodic batch type data transmission between the host computer and the communication device. The ability to switch from a high power, high precision and high cost transmission system to a low power, low precision and low cost transmission system at the level at which a great number of data terminal devices are used provides system flexibility at a reasonable cost.

    摘要翻译： 数字数据通信系统使得主机能够与具有指定功能的大量数据终端进行通信。 来自主计算机的通信通过中长距离，大功率收发器和通过多路复用系统进行到多个便携式通信设备之一。 通信设备优选地包含诸如可充电NiCad电池组的内部电源。 这些装置可以携带在人的皮带上，或者可以安装在服务车辆内或其上，例如用于仓库操作的叉车或商品运送路线车辆。 通信设备适于在主计算机和所选择的数据终端之间用作通信中继设备。 每个通信设备包括第一类型的低功率收发器，用于在第一通道内以低功率传输级别与选定数量的数据终端进行通信，该数据终端还具有这种第一类型的收发器。 每个通信设备还包括大功率收发器，以在第二信道内与主计算机的收发信机进行通信。 微处理器操作的地址控制器允许通信设备通过接收和重新发送本地定向的通信来控制数据终端之间的低功率通信。 控制器和控制协议进一步在低功率通信级别和主机之间中继数据消息。 在操作中，设备在其中一个收发器上接收数据消息，并在另一个收发器上传送它们。 通信设备还可以包含足够的存储器容量以允许主计算机和通信设备之间的周期性批量类型数据传输。 从大功率，高精度和高成本传输系统切换到低功耗，低精度和低成本传输系统的能力，在大量数据终端设备的使用水平上，以合理的成本提供了系统灵活性。

    MULTIPLE ANTENNA SELECTION AND ANTENNA CAP FOR COMPUTER DEVICES UTILIZING RADIO AND MODEM CARDS
    6.
    发明公开
    MULTIPLE ANTENNA SELECTION AND ANTENNA CAP FOR COMPUTER DEVICES UTILIZING RADIO AND MODEM CARDS 失效
    多天线选择和天线罩电脑设备无线电和现代CARD

    公开(公告)号：EP0716786A1

    公开(公告)日：1996-06-19

    申请号：EP94916663.0

    申请日：1994-04-28

    申请人： NORAND CORPORATION

    发明人： KINNEY, Patrick, W. ,  MAHANY, Ronald, L. ,  WEST, Guy, J.

    IPC分类号： G06F1 ,  G06F15 ,  H01Q1 ,  H01Q21 ,  H04B1 ,  H04L12 ,  H04L29 ,  H04W88 ,  H04M1

    摘要： A computer apparatus (40) for receiving a removable communication card (44) such as a radio card or a modem card. A radio or modem is self-contained inside a housing of the communication card (44) and has an electrical interface for communicating information to and from the computer apparatus (40). The computer apparatus (40) receives the communication card (44) such that it engages the electrical interface. A radio communication card (44) is connected to the appropriate antenna or antennas for the type and frequency of the radio. Antenna contacts are disposed on the cap to engage the antenna contacts positioned on the end of the radio card. The antenna or antennas are embedded in the cap or attached to the housing of the computer device (40).