ABSTRACT

Internet of Things (IoT) has widely been deployed in various industrial fields. To achieve hyperautomation in IoT-based applications, it calls for high-efficient wireless transmission technologies to improve the response speed of IoT nodes. Frequency-domain contention (FDC) is a promising contention-based channel access mechanism to meet this requirement. However, the nature of FDC’s multiple-transmission-multiple-reception and the limit of IoT chip’s synchronization accuracy will lead to carrier frequency offset (CFO) and hence frequent transmission collisions and null transmissions. Considering integer and fractional CFO, this paper theoretically analyzes the FDC throughput and verifies the accuracy of our model via extensive simulations.

摘要

物联网（IoT）已广泛部署在各个工业领域。为了实现物联网应用的超自动化，需要高效的无线传输技术来提高物联网节点的响应速度。频域竞争（FDC）是一种很有前景的基于竞争的信道接入机制，可以满足这一要求。然而，FDC多发多收的特性以及物联网芯片同步精度的限制会导致载波频率偏移（CFO），从而导致频繁的传输冲突和空传输。考虑整数和分数 CFO，本文从理论上分析了 FDC 吞吐量，并通过大量仿真验证了我们模型的准确性。