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arXiv 1010.2667cs.ITcs.NImath.IT
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基于快速开关分双工的虚拟全双工无线通信

Virtual Full-Duplex Wireless Communication via Rapid On-Off-Division Duplex

Dongning Guo, Lei Zhang

摘要:

本文介绍了一种新的范式设计的物理层和介质访问控制(MAC)层的移动自组织或对等网络形成的半双工无线电。配备有这种无线电的节点不能以相同的频率同时发送和接收有用的信号。与传统设计不同,在传统设计中,节点的传输帧被调度为远离其接收,每个节点在每个帧间隔上通过随机生成的开-关双工掩码(或签名)来发送其信号,并通过其自己的每个关时隙来接收信号。这被称为快速开关分双工(RODD)。在单个帧的时段上,每个节点可以向其对等体中的一些或全部对等体发送消息,并且可以同时从每个对等体接收消息。因此,RODD使用半双工无线电实现虚拟全双工通信,并且可以显著简化网络协议栈的更高层的设计。RODD的吞吐量进行了评估,在一些一般的设置,这是显着大于ALOHA。RODD是特别有效的情况下,占主导地位的业务是同时广播从节点到他们的一跳对等,如在自发的无线社交网络,紧急情况下或在战场上。重要的设计问题的对等发现,分布的开关签名,同步和错误控制编码也得到了解决。

英文摘要:

This paper introduces a novel paradigm for design- ing the physical and medium access control (MAC) layers of mobile ad hoc or peer-to-peer networks formed by half-duplex radios. A node equipped with such a radio cannot simultaneously transmit and receive useful signals at the same frequency. Unlike in conventional designs, where a node's transmission frames are scheduled away from its reception, each node transmits its signal through a randomly generated on-off duplex mask (or signature) over every frame interval, and receive a signal through each of its own off-slots. This is called rapid on-off- division duplex (RODD). Over the period of a single frame, every node can transmit a message to some or all of its peers, and may simultaneously receive a message from each peer. Thus RODD achieves virtual full-duplex communication using half-duplex radios and can simplify the design of higher layers of a network protocol stack significantly. The throughput of RODD is evaluated under some general settings, which is significantly larger than that of ALOHA. RODD is especially efficient in case the dominant traffic is simultaneous broadcast from nodes to their one-hop peers, such as in spontaneous wireless social networks, emergency situations or on battlefield. Important design issues of peer discovery, distribution of on-off signatures, synchronization and error-control coding are also addressed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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