We present PC-RPL , a transmission power-controlled IPv6 routing protocol for low-power and lossy wireless networks that significantly improves the end-to-end packet delivery performance under heavy traffic compared to the standard RPL. We show through actual design, implementation, and experiments that a multihop wireless network can achieve better throughput and routing stability when transmission power and routing topology are “jointly and adaptively” controlled. Our experiments show that the predominant “fixed and uniform” transmission power strategy with “link quality and hop distance”–based routing topology construction (i.e., RPL) loses significant bandwidth due to hidden terminal and load imbalance problems. We design an adaptive and distributed control mechanism for transmission power and routing topology, named PC-RPL , on top of the standard RPL routing protocol for hidden terminal mitigation and load balancing. We implement PC-RPL on real embedded devices and evaluate its performance on a 49-node multihop testbed. PC-RPL reduces total end-to-end packet losses by approximately sevenfold without increasing hop distance compared to RPL with the highest transmission power, resulting in 17% improvement in aggregate bandwidth and 64% improvement for the worst-case node by successfully alleviating both hidden terminal and load imbalance problems.

中文翻译：

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PC-RPL

我们提出PC-RPL，一种传输功率控制的 IPv6 路由协议，用于低功耗和有损无线网络，与标准 RPL 相比，可显着提高大流量下的端到端数据包传输性能。我们通过实际设计、实现和实验表明，当传输功率和路由拓扑受到“联合和自适应”控制时，多跳无线网络可以实现更好的吞吐量和路由稳定性。我们的实验表明，基于“链路质量和跳距”的路由拓扑结构（即RPL）占主导地位的“固定和均匀”传输功率策略由于隐藏终端和负载不平衡问题而损失了大量带宽。我们设计了一种用于传输功率和路由拓扑的自适应分布式控制机制，命名为PC-RPL，在用于隐藏终端缓解和负载平衡的标准 RPL 路由协议之上。我们实施PC-RPL在真正的嵌入式设备上，并在 49 节点多跳测试平台上评估其性能。PC-RPL与具有最高传输功率的 RPL 相比，在不增加跳跃距离的情况下，将总的端到端数据包丢失减少了大约 7 倍，通过成功减轻隐藏终端和负载不平衡问题。