面向接收器的工业无线网络策略
Recorp: Receiver-Oriented Policies for Industrial Wireless Networks
摘要：
未来的工业物联网（IIoT）系统将需要无线解决方案来连接传感器、执行器和控制器，作为实时流上高数据率反馈控制环路的一部分。在这样的网络中的一个关键挑战是提供可预测的性能和适应性，以响应链路质量的变化。我们通过开发接收器ORiented Policy（Recordp）来应对这一挑战，该策略通过结合离线策略合成和运行时自适应来利用IIoT工作负载的稳定性。与在时隙中服务单个流的调度相比，记录策略通过分配协调器和可以在同一时隙中服务的流的列表来在多个流之间共享时隙。在运行时，协调器将根据协调器已经接收到的流来执行其中一个流。Recorp的一个突出特点是它提供了可预测的性能：当链路质量超过用户指定的阈值时，策略满足流的端到端可靠性和最后期限。实验表明，在IIoT工作负载中，当调度和策略配置为满足99%的端到端可靠性时，策略的实时容量中值增加了50%到142%，最坏情况下的延迟中值减少了27%到70%。
英文摘要：
Future Industrial Internet-of-Things (IIoT) systems will require wireless solutions to connect sensors, actuators, and controllers as part of high data rate feedback-control loops over real-time flows. A key challenge in such networks is to provide predictable performance and adaptability in response to link quality variations. We address this challenge by developing RECeiver ORiented Policies (Recorp), which leverages the stability of IIoT workloads by combining offline policy synthesis and run-time adaptation. Compared to schedules that service a single flow in a slot, Recorp policies share slots among multiple flows by assigning a coordinator and a list of flows that may be serviced in the same slot. At run-time, the coordinator will execute one of the flows depending on which flows the coordinator has already received. A salient feature of Recorp is that it provides predictable performance: a policy meets the end-to-end reliability and deadline of flows when the link quality exceeds a user-specified threshold. Experiments show that across IIoT workloads, policies provided a median increase of 50% to 142% in real-time capacity and a median decrease of 27% to 70% in worst-case latency when schedules and policies are configured to meet an end-to-end reliability of 99%.
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