Mesh connectivity is attractive for Internet-of- Things (IoT) applications from various perspectives. The recent Bluetooth mesh specification provides a full-stack mesh networking solution, potentially for thousands of nodes. Although Bluetooth mesh has been adopted for various IoT applications, its performance aspects are not extensively investigated in literature. This paper provides an experimental evaluation of Bluetooth mesh (using Nordic nRF52840 devices) with an emphasis on those aspects which are not well-investigated in literature. Such aspects include evaluation of unicast and group modes, performance under different traffic patterns, impact of message segmentation, and most importantly, latency performance for perfect reliability. The paper also investigates performance enhancement of Bluetooth mesh based on different techniques including parametric adjustments, extended advertisements (introduced in Bluetooth 5.0), power control, and customized relaying. Results provide insights into system-level performance of Bluetooth mesh while clarifying various important issues identified in recent studies.

翻译：最新蓝牙网格规格提供了全斯塔克网状网络化解决方案,可能针对数千个节点。虽然对各种互联网网状应用程序采用了蓝牙网状,但其性能方面在文献中没有进行广泛调查。本文对蓝牙网状(使用北欧 nRF52840 设备)进行了实验性评价,重点是在文献中调查不当的方面。这些方面包括:对单调和群落模式的评价、不同交通模式下的性能、信息分割的影响,以及最重要的是,精密性能。本文还调查了蓝牙网状基于不同技术的性能提升情况,包括参数调整、扩展广告(在蓝牙5.0中介绍)、电源控制和定制继电器。结果提供了对蓝牙网状系统性能的深入了解,同时澄清了最近研究中发现的各种重要问题。