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Random access with physical-layer network coding

机译:物理层网络编码的随机访问

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摘要

Leveraging recent progress in compute-and-forward we propose an approach to random access that is based on physical-layer network coding: When packets collide, it is possible to recover a linear combination of the packets at the receiver. Over many rounds of transmission, the receiver can thus obtain many linear combinations and eventually recover all original packets. This is by contrast to slotted ALOHA where packet collisions lead to complete erasures. The throughput of the proposed strategy is derived for a system with two users and shown to be significantly superior to the best known strategies, including multipacket reception.
机译:利用最近在计算和转发方面的进展,我们提出了一种基于物理层网络编码的随机访问方法:当数据包发生冲突时,可以在接收器处恢复数据包的线性组合。因此,在多轮传输中,接收器可以获得许多线性组合,并最终恢复所有原始数据包。与之相反,时隙式ALOHA的数据包冲突会导致完全擦除。所提出策略的吞吐量是针对具有两个用户的系统得出的,并且显示出明显优于包括多数据包接收在内的最佳策略。

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