Simultaneous Bi-Directional Communications and Data Forwarding Using a Single ZigBee Data Stream

Zicheng Chi

doi:10.1109/TNET.2021.3054339

Simultaneous Bi-Directional Communications and Data Forwarding Using a Single ZigBee Data Stream

2021-04-01

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DOI：10.1109/TNET.2021.3054339

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With the exponentially increasing number of Internet of Things (IoT) devices and the huge volume of data generated by these devices, there is a pressing need to investigate a more efficient communication method in both frequency and time domains at the edge of IoT networks. In this paper, we present Amphista, a novel cross-layer design for IoT communication and data forwarding that can more efficiently utilize the ever increasingly crowded 2.4 GHz spectrum near the gateway. Specifically, to enable the communication from ZigBee to WiFi, we leverage WiFi's fine-grained channel state information to extract the concurrently transmitted ZigBee-to-WiFi message from time overlapped ZigBee and WiFi packet. We further leverage this unique feature and design a novel forwarding protocol that can simultaneously forward uplink (e.g., collecting sensing data) and downlink (e.g., disseminating control messages) data by using a single ZigBee data stream. Our extensive experimental results show that Amphista significantly improves throughput (by up to 400x) and reduces the latency.

Keywords:

Zigbee

Wireless fidelity

Logic gates

Protocols

Uplink

Throughput

Physical layer

Wireless

cross-technology

CPS

Internet of Things (IoT)

Simultaneous Bi-Directional Communications and Data Forwarding Using a Single ZigBee Data Stream

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