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    Radio transmitter/receiver for wireless local area network
    2.
    发明授权
    Radio transmitter/receiver for wireless local area network 失效
    用于无线局域网的无线电发射机/接收机

    公开(公告)号：US5838730A

    公开(公告)日：1998-11-17

    申请号：US439083

    申请日：1995-05-11

    申请人： Peter K. Cripps

    发明人： Peter K. Cripps

    IPC分类号： H04B1/713 ,  H04B1/7143 ,  H04B1/7156 ,  H04L12/28 ,  H04L27/10

    CPC分类号： H04B1/7143 ,  H04B1/713 ,  H04B1/7156 ,  H04W36/08 ,  H04W76/02 ,  H04B2001/71563 ,  H04W24/00 ,  H04W28/26 ,  H04W36/00 ,  H04W48/08 ,  H04W48/16 ,  H04W48/20 ,  H04W74/004 ,  H04W74/006 ,  H04W74/0808 ,  H04W8/005 ,  H04W84/12 ,  H04W88/08

    摘要： A wireless local area network includes a radio transmitter/receiver for transmitting and receiving in accordance with the FCC rules for the ISM band. The receiver/transmitter supports spread spectrum frequency hopping in the 2.4 GHz ISM band and can be tuned to one of e.g. 82 different frequencies spaced at 1 MHz intervals. The radio transmitter/receiver is a low cost, low power, small size unit located on a printed circuit board in a PCMCIA form factor. Third order mixers are used in combination with a switched prescaler for a low cost and compact frequency control system capable of rapid switching of the radio between transmitting and receiving functions. No special shielding is needed between the frequency control circuitry and the receiver IF circuitry.

    摘要翻译： 无线局域网包括用于根据用于ISM频带的FCC规则进行发送和接收的无线电发射机/接收机。 接收机/发射机支持在2.4GHz ISM频带中的扩频跳频，并且可以调谐到例如 82个不同的频率间隔1 MHz。 无线电发射机/接收机是一种低成本，低功耗，小尺寸的单元，位于PCMCIA外形尺寸的印刷电路板上。 三阶混频器与切换预分频器结合使用，可实现低成本和紧凑的频率控制系统，能够在发射和接收功能之间快速切换无线电。 在频率控制电路和接收机IF电路之间不需要特殊的屏蔽。

    Dynamic wireless local area network with interactive communications within the network
    3.
    发明授权
    Dynamic wireless local area network with interactive communications within the network 失效
    动态无线局域网与网络内的交互式通信

    公开(公告)号：US5875186A

    公开(公告)日：1999-02-23

    申请号：US787843

    申请日：1997-01-23

    申请人： Philip H. Belanger ,  William N. Baugh ,  David B. Rosen

    发明人： Philip H. Belanger ,  William N. Baugh ,  David B. Rosen

    IPC分类号： H04B1/713 ,  H04B1/7143 ,  H04B1/7156 ,  H04L12/28 ,  H04Q7/20

    CPC分类号： H04B1/7143 ,  H04B1/713 ,  H04B1/7156 ,  H04W36/08 ,  H04W76/02 ,  H04B2001/71563 ,  H04W24/00 ,  H04W28/26 ,  H04W36/00 ,  H04W48/08 ,  H04W48/16 ,  H04W48/20 ,  H04W74/004 ,  H04W74/006 ,  H04W74/0808 ,  H04W8/005 ,  H04W84/12 ,  H04W88/08

    摘要： A network with wireless links is a dynamic learning system which allows a mobile (wireless) unit to determine which access point (wired) unit provides the mobile unit with the best communications as the mobile unit roams within an area and from area to area. As a mobile unit enters a new area, it scans the area to find an access point unit. After the mobile unit is verified by the access point unit, the mobile unit receives updated information about other access points in the area, including information indicating which access point units are within wireless transmission range of the mobile unit as well as multiple values indicating a communication range for a particular access point unit to the mobile unit. The information is updated as the system gathers new information through the mobile units and access point units within the system area. The more mobile units that enter and leave the area, the more information is gathered by the access point units functioning in the system and the more information the system learns. A mobile unit can also decide to switch to a new access point unit when the quality of service degrades by accessing information about access point units within the system.

    摘要翻译： 具有无线链路的网络是动态学习系统，其允许移动（无线）单元确定哪些接入点（有线）单元为移动单元提供最佳通信，因为移动单元在区域内和区域之间漫游。 当移动单元进入新区域时，它将扫描该区域以找到接入点单元。 在移动单元被接入点单元验证之后，移动单元接收关于该区域中的其他接入点的更新信息，包括指示哪些接入点单元在移动单元的无线传输范围内的信息以及指示通信的多个值 用于特定接入点单元到移动单元的范围。 当系统通过系统区域内的移动单元和接入点单元收集新信息时，更新信息。 进入和离开区域的移动单元越多，系统中运行的接入点单元收集的信息越多，系统学习的信息越多。 当通过访问关于系统内的接入点单元的信息来降低服务质量时，移动单元还可以决定切换到新的接入点单元。