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    • 7. 发明授权
    • Medium access control protocol for OFDM wireless networks
    • 用于OFDM无线网络的媒体接入控制协议
    • US07869397B2
    • 2011-01-11
    • US12467163
    • 2009-05-15
    • Michael A. PollackVincent K. JonesGregory G. Raleigh
    • Michael A. PollackVincent K. JonesGregory G. Raleigh
    • H04W4/00
    • H04L5/023H04L27/2602
    • 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.
    • 一种媒体接入争用协议,其在无线网络中,特别是在使用诸如OFDM无线网络的固定的最小突发大小的无线网络中是非常有益的。 在一个实施例中,MAC协议是使总线介质(所分配的频谱)的利用最大化的需求分配协议。网络中的每个数据通信设备(DCD)与中央接入点(AP)通信。 多个DCD可以在相同的请求访问(RA)突发中请求来自AP的访问。 多个DCD中的每一个在RA突发中的频域信道内向AP发送其接入请求,该RA突发与正在其他DCD请求接入的频域信道正交。 每个DCD包括访问请求突发中的信道训练信息,以允许AP和/或DCD适应信道特性的快速变化。