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    Medium access control protocol for OFDM wireless networks
    3.
    发明申请
    Medium access control protocol for OFDM wireless networks 有权

    公开(公告)号：US20060007885A1

    公开(公告)日：2006-01-12

    申请号：US11221430

    申请日：2005-09-08

    申请人： Michael Pollack ,  Vincent Jones ,  Gregory Raleigh

    发明人： Michael Pollack ,  Vincent Jones ,  Gregory Raleigh

    IPC分类号： H04Q7/00

    CPC分类号： H04L5/023 ,  H04L27/2602

    摘要： A medium access contention protocol that is highly beneficial in wireless networks and particularly in wireless networks that employ a fixed minimum burst size such as OFDM wireless networks. In one embodiment, a MAC protocol is a demand-assigned protocol that maximizes utilization of the bus medium (the allocated frequency spectrum.) Each data communication device (DCD) in the network communicates with a central access point (AP). Multiple DCDs may request access from the AP in the same request access (RA) burst. Each of the multiple DCDs transmits its access request to the AP within a frequency domain channel in the RA burst that is orthogonal to the frequency domain channels used by the other DCDs requesting access. Each DCD includes channel training information in the access request burst to allow the AP and/or DCD to adapt to rapid variations in channel characteristics.

    MAC protocol employing multiple data rates
    8.
    发明申请
    MAC protocol employing multiple data rates 有权
    MAC协议采用多种数据速率

    公开(公告)号：US20050089009A1

    公开(公告)日：2005-04-28

    申请号：US10956740

    申请日：2004-10-01

    申请人： Gregory Raleigh ,  Vincent Jones ,  Michael Pollack

    发明人： Gregory Raleigh ,  Vincent Jones ,  Michael Pollack

    IPC分类号： H04J4/00 ,  H04L1/00 ,  H04L12/28 ,  H04L12/56 ,  H04W28/22 ,  H04W28/26 ,  H04W72/04 ,  H04W74/00 ,  H04L12/66 ,  H04J3/24

    CPC分类号： H04L12/2898 ,  H04J4/00 ,  H04L1/0002 ,  H04L1/0025 ,  H04L12/2856 ,  H04L47/15 ,  H04L47/70 ,  H04L47/788 ,  H04L47/801 ,  H04L47/805 ,  H04L47/824 ,  H04W28/22 ,  H04W28/26 ,  H04W72/042 ,  H04W72/0446 ,  H04W72/0453 ,  H04W74/00

    摘要： Method and apparatus for combining high data rate traffic and low data rate traffic on a common transmission medium while maximizing efficient use of available spectrum. Since spectrum is an economically valuable resource and transport of data generates revenue, the present invention directly leads to more profitable network operation. The disclosed systems are applicable to both wired and wireless transmission media. In one embodiment, a bandwidth reservation scheme provides that data rate may be varied so that when a particular data communication device is allocated a frame, it is also assigned a data rate for use in that frame. Because bandwidth usage varies with data rate, the division of available spectrum into channels for use by individual data communication devices may also vary among frames.

    摘要翻译： 用于在普通传输介质上组合高数据速率业务和低数据速率业务同时最大限度地利用可用频谱的方法和装置。 由于频谱是一种经济上有价值的资源，数据的传输产生收益，本发明直接导致更有利可图的网络运行。 所公开的系统适用于有线和无线传输介质。 在一个实施例中，带宽预留方案提供数据速率可以被改变，使得当特定的数据通信设备被分配一个帧时，它也被分配用于该帧的数据速率。 由于带宽使用随数据速率而变化，所以将可用频谱划分成各个数据通信设备使用的信道也可能在帧之间变化。

    Optimal use of request access TDMA slots for automatic level control
    10.
    发明授权
    Optimal use of request access TDMA slots for automatic level control 有权
    最佳使用请求接入TDMA时隙进行自动电平控制

    公开(公告)号：US06788950B1

    公开(公告)日：2004-09-07

    申请号：US09348645

    申请日：1999-07-06

    申请人： Ali Raissinia ,  Gregory G. Raleigh ,  Vincent K. Jones, IV ,  Michael Pollack

    发明人： Ali Raissinia ,  Gregory G. Raleigh ,  Vincent K. Jones, IV ,  Michael Pollack

    IPC分类号： H04B700

    CPC分类号： H04W52/50 ,  H04W52/223 ,  H04W52/60

    摘要： Systems and methods for controlling subscriber unit power level using power measurements made on access request transmissions. Since a subscriber unit access request typically precedes a subscriber unit data transmission by a relatively short period of time, the data transmission power level will then be based on a recent power measurement. The access request may also trigger a sequence of power control steps including the transmission of special upstream power measurement transmissions which can be used as the basis for even more accurate power control. These power control features are particularly useful in fading environments such as found in a wireless system.

    摘要翻译： 使用在接入请求传输上进行的功率测量来控制用户单元功率电平的系统和方法。 由于用户单元访问请求通常在用户单元数据传输之前相对较短的时间段，所以数据传输功率电平将基于最近的功率测量。 访问请求还可以触发一系列功率控制步骤，包括传输特殊的上行功率测量传输，这些传输可以用作更精确的功率控制的基础。 这些功率控制特征在诸如无线系统中的衰落环境中特别有用。