A new random access protocol assisted by fixed relay stations under the transparent mode in multi-hop relay networks over the time division multiple access was presented.

提出时分多址方式下由固定中继节点支持的透明模式下的随机接入协议，通过中继节点与用户间的合作重传来解决多个用户同时接入发生碰撞的问题。

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For multiple access communication systems with high propagation delay (e. g., satellite communication systems), an active repeat random access protocol is proposed.

针对具有长传播时延的多址系统(如卫星通信系统)，提出了主动重发的随机多址协议。

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