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    • 5. 发明授权
    • Spread spectrum time-division multiple access communication scheme
    • 扩频时分多址通信方案
    • US06493334B1
    • 2002-12-10
    • US09352261
    • 1999-07-13
    • Witold A. KrzymienSongsong Sun
    • Witold A. KrzymienSongsong Sun
    • H04B7216
    • H04B1/7103H04B1/7075H04B7/2618
    • A new DTX-MAC protocol is proposed for a cellular radio telecommunications system with many users. Several users are allowed to transmit packets within a time-slotted frame structure. Direct sequence spread spectrum technique is used to spread the packets, and all packets within the frame are spread using the same spreading sequence. The packets overlap, but each packet begins within a distinct slot of the frame. Each slot, or mini-slot, since it is much shorter than the packet, is dedicated to one of the mobile terminal users. Collisions between packets are prevented by appropriate selection of the duration of the mini-slot. Packets may be ARMs, user data, or both. A packet beginning within a mini-slot is assumed to be from the mobile terminal to which that mini-slot is dedicated
    • 为具有许多用户的蜂窝无线电信系统提出了一种新的DTX-MAC协议。 允许几个用户在时隙帧结构内传输数据包。 使用直接序列扩频技术来扩展分组,并且使用相同的扩展序列来扩展帧内的所有分组。 分组重叠,但是每个分组在帧的不同时隙内开始。 每个时隙或微时隙,因为它比分组短得多,专门用于移动终端用户之一。 通过适当选择小时隙的持续时间来防止分组之间的冲突。 数据包可以是ARM,用户数据或两者。 假设在小时隙内开始的分组来自该专用小时隙的移动终端