Parallel inclusive communication for connecting heterogeneous IoT devices at the edge
Parallel inclusive communication for connecting heterogeneous IoT devices at the edge
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DOI：
10.1145/3356250.3360046
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发表时间：
2019-11
期刊：
影响因子：
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通讯作者：
Zicheng Chi;Yan Li;Xin Liu;Yao Yao-Yao;Yanchao Zhang;Ting Zhu
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文献类型：
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作者：
Zicheng Chi;Yan Li;Xin Liu;Yao Yao-Yao;Yanchao Zhang;Ting Zhu
WiFi和低功耗蓝牙（BLE）广泛用于物联网（IoT）设备。由于WiFi和BLE在重叠的ISM 2.4 GHz频段内工作，因此它们会相互干扰。现有的方法已经证明了它们在减轻干扰方面的有效性。然而，WiFi或BLE的独占通信的设计目标阻碍了进一步的性能改进，其仅允许一个WiFi或BLE设备在通信范围内的重叠信道上的任何特定时隙发送分组。在本文中，我们探索了一种新的通信方法，称为并行包容性通信（PIC），它利用WiFi和BLE的独特调制方案，在重叠的信道内同时并行包容性双向传输WiFi和BLE数据。在该通信系统中，PIC网关是基于IEEE 802.11g和802.15.1框架设计的，而WiFi和BLE客户端是商业现成设备。PIC为这些并行WiFi和BLE通信实现了类似的数据速率，就好像WiFi和BLE单独通信一样。PIC的系统架构自然适合互联网的边缘，这是同时从（或向）使用WiFi或BLE的指数增长数量的物联网设备收集（或传播）数据的最佳站点。我们在四个真实场景下进行了广泛的评估。结果表明，与现有方法相比，PIC可以显著i）将分组接收率提高183%; ii）将往返延迟时间减少590倍，能量消耗减少50.5倍; iii）提高WiFi和BLE共存场景下的吞吐量。
WiFi and Bluetooth Low Energy (BLE) are widely used in Internet of Things (IoT) devices. Since WiFi and BLE work within the overlapped ISM 2.4 GHz band, they will interfere with each other. Existing approaches have demonstrated their effectiveness in mitigating the interference. However, further performance improvement has been hampered by the design goal of exclusive communication of WiFi or BLE, which only allows one WiFi or BLE device to transmit packets at any specific time slot on the overlapped channel within the communication range. In this paper, we explore a new communication method, called Parallel Inclusive Communication (PIC), which leverages the unique modulation schemes of WiFi and BLE for parallel inclusive bi-directional transmission of both WiFi and BLE data at the same time within the overlapped channel. In this communication system, the PIC gateway is designed upon the IEEE 802.11g and 802.15.1 frameworks while the WiFi and BLE clients are commercial off-the-shelf devices. PIC achieves similar data rates for these parallel WiFi and BLE communications as if WiFi and BLE are communicating separately. PIC's system architecture naturally fits at the edge of the Internet, which is an optimal site for concurrently collecting (or disseminating) data from (or to) an exponentially increasing number of IoT devices that are using WiFi or BLE. We conducted extensive evaluations under four real-world scenarios. Results show that compared with existing approaches, PIC can significantly i) increase the packet reception ratios by 183%; ii) reduce the round-trip delay time by 590 times and energy consumption by 50.5 times; and iii) improve the throughput under WiFi and BLE coexistence scenarios.