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On the feasibility of collision detection in full-duplex 802.11 radio

机译：关于全双工802.11无线电中冲突检测的可行性

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Full-duplex radios are becoming a feasible reality thanks to recent advances in self-interference cancellation. Switching from half- to full-duplex requires a major re-design of many network features and characteristics, including the MAC layer. The literature provides several new proposals or improvements that are applicable in different topologies: centralized, distributed, and multi-hop Wireless LANs (WLANs). These proposals, however, mostly focus on directional, unicast communication. While the main goal of unicast-focused approaches is to get as close as possible to doubling the throughput, it is still unclear how to exploit full-duplex radios in broadcast-like environments such as the vehicular one or in general in WiFi-like scenarios where interference is the dominating impairment. In this work we analyze the possible benefits and drawbacks of exploiting self-interference cancellation in full-duplex radios to implement collision detection. We show that, if proved feasible, the required changes to the MAC layer of an 802.11-based transceiver would be minimal, and could largely improve the performance with respect to a standard collision avoidance mechanism. In addition, the paper discusses the tricky aspects and the parameters required to identify a collision in a wireless network and discusses the many differences between managing collisions in a wired and in a wireless environment.
机译：由于自干扰消除技术的最新进展，全双工无线电正成为可行的现实。从半双工切换到全双工需要对许多网络功能（包括MAC层）进行重大的重新设计。文献提供了适用于不同拓扑的一些新建议或改进：集中式，分布式和多跳无线LAN（WLAN）。但是，这些建议主要集中在定向单播通信上。尽管以单播为中心的方法的主要目标是使吞吐量尽可能接近加倍，但仍不清楚如何在类似广播的环境（如车辆环境）或一般在类似WiFi的环境中利用全双工无线电其中干扰是主要的损害。在这项工作中，我们分析了在全双工无线电中利用自干扰消除来实现冲突检测的可能的利弊。我们证明，如果证明是可行的，则对基于802.11的收发器的MAC层所做的必要更改将是最小的，并且相对于标准的避免冲突机制，它可以大大提高性能。此外，本文讨论了在无线网络中识别冲突所需的棘手方面和参数，并讨论了在有线和无线环境中管理冲突之间的许多区别。

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