解构BLE多跳：一种基于模型的挑战量化方法

中文摘要 AI 辅助

蓝牙低功耗（BLE）最初设计用于点对点通信，但BLE多跳网络已引起学术界和工业界的兴趣。然而，多跳通信由于各个节点时钟的差异，会在网络中引入去同步节点。本文研究时钟漂移对BLE多跳网络的影响，旨在探究BLE多跳网络能否正确建立、为何能或不能以及如何建立。为此，我们开发了一个数学模型来量化由单个设备管理的BLE连接之间的碰撞概率，并针对受限部署提供了模型的简化版本。通过实际实验验证了时钟漂移的影响及我们的数学模型。随后，我们发现BLE多跳网络在大多数情况下无法消除时钟漂移的影响。此外，从长远来看，BLE连接之间的碰撞以固定频率发生。我们进一步分析了使用BLE构建多跳网络的局限性，并提出了可能的解决方案，如拓扑限制、对BLE协议栈或硬件的修改。本文对BLE在多跳网络中的局限性进行了清晰且定量的阐述。

英文摘要

Bluetooth Low Energy (BLE) was originally designed for point-to-point communication, but BLE multi-hop networks have attracted academic and industrial interest. Multi-hop communication, however, introduces desynchronized nodes to the network due to the difference in individual clocks. In this paper, we study the impact of clock drift on a BLE multi-hop network. The aim is to find out if a BLE multi-hop network can be properly set up, why, and how. For this goal, we develop a mathematical model to quantify the collision probability among BLE connections managed by a single device. We provide a simplified version of the model for constrained deployment. The impact of clock drift and our mathematical model are validated through practical experiments. Afterward, we find that a BLE multi-hop network cannot eliminate the impact of clock drift in most cases. Moreover, from a long-term point of view, the collision between BLE connections occurs with a fixed frequency. We further analyze the limitation of using BLE to form multi-hop networks, and propose possible solutions, such as topology limitation, changes to BLE stack or hardware. This paper is a clear and quantitative problem statement on the limitations of using BLE in multi-hop networks.

发表机构

• Faculty of Computer Science, TU Dresden（德累斯顿工业大学计算机科学学院）
• TU Dresden（德累斯顿工业大学）
• Barkhausen Institut（巴克拉豪森研究所）
• Department of Computer Science, HAW Hamburg（汉堡应用科学大学计算机系）

机构由 AI 辅助整理，请以论文原文为准。