Session Poster

Poster & Demo Session

1:00 PM — 1:40 PM JST
Dec 18 Fri, 11:00 PM — 11:40 PM EST

A Study on MQTT Node Selection

Fu Chen, Yujia Huo, Kun Liu, Wenying Tang, Jianming Zhu, Zhiyuan Sui (Central University of Finance and Economics, China)

The Internet of Things (IOT) is an Internet-based network that covers everything. Message Queuing Telemetry Transport (MQTT) is one of the commonly used communication protocols for any platform in the Internet of Things. Whether it is from the perspective of overall security or device compatibility and resource consumption, the MQTT protocol has certain advantages and is the most competitive communication protocol in the current Internet of Things. However, the user password login form adopted by the MQTT protocol has a certain degree of security problems. IOTA is an encrypted currency, and the Tangle network it uses is a new distributed structure. Based on this situation, this article innovatively combines the Tangle network with the MQTT protocol, and proposes a new communication option for MQTT nodes. When a new node enters the network, start from the Broker with the help of a "walker", by judging the connection and survival of the node, using the Markov Chain Monte Carlo (MCMC) random walk algorithm to complete the node selection, and finally realize MQTT Communication between nodes. This article puts forward the design idea of this scheme, and realizes the scheme through simulation experiment.

Vision-aided 3D Human Pose Estimation with RFID

Chao Yang (Auburn University, USA); Xuyu Wang (California State University, Sacramento, USA); Shiwen Mao (Auburn University, USA)

Radio Frequency (RF) based human pose estimation
techniques have been proposed to generate human pose
without using a camera, so people will no longer worry
about their privacy. Compared with other RF sensing
based systems, Radio Frequency Identification (RFID)
provides a promising solution for RF based human
pose estimation. RFID tags can be used as wearable
sensors because of their small size. The interference
caused by the multipath effect is much smaller in the
RFID system. The cost of RFID systems is also lower
than the advanced radar based systems such as FMCW
radar. Thus, we propose the RFID-Pose system for
tracking the movements of multiple human limbs in
realtime. In the proposed system, RFID tags are
attached to the target human joints. The movement
of the tags are captured by the phase variations in
the responses from each tag. The human pose is
reconstructed by estimating rotation angles from RFID
data and the initial human skeleton. The vision data
will not be needed anymore in the testing phase, so
the user’s privacy can be well protected.

Impact of Mode Selection on the Performance of D2D-Unlicensed Communications

Ganggui Wang, Celimuge Wu, Tsutomu Yoshinaga (The University of Electro-Communications, Japan); Rui Yin (Zhejiang University City College, China)

Device-to-Device (D2D) communication, which enables
direct connection between the nearby user equipments
(UEs), is one of the key technologies in 5G network. In this paper,
D2D communication on the unlicensed spectrum, namely, D2D-U
is discussed. D2D system performance can be efficiently enhanced
by utilizing the unlicensed band. However, it has a huge impact
on the performance of other unlicensed networks. Therefore, the
fairness of the coexistence scheme is a key problem for D2D-U. To
solve the coexistence problem, two access schemes called Listen
Before Talk (LBT) and Duty Cycle Mechanism (DCM) have been
discussed extensively. D2D users choose the transmission mode
according to transmission environments. In this paper, we discuss
the performance of these two modes. Furthermore, the problem
of how to access the unlicensed band with combination of these
two modes is also discussed.

UAV-empowered Protocol for Information Sharing in VDTN

Zhaoyang Du, Celimuge Wu, Tsutomu Yoshinaga (The University of Electro-Communications, Japan)

The Delay Tolerant Network (DTN) is a network
architecture that plays an important role in intermittently connected
networks. DTNs can support transmissions between clients
even there are no end-to-end connections by using “store-carryforward”
mechanism, where some nodes called ferry nodes could
be employed into DTN to enhance the network performance.
In this paper, we use Unmanned Aerial Vehicles (UAVs) to act
as ferry nodes, and a probabilistic routing protocol based on
the encounter connection time between nodes is proposed. The
proposed protocol not only considers the efficiency of message
transmission but also the reliability between connected nodes.
The proposed protocol and some existing protocols are compared
and analyzed using ONE simulator. The simulation results show
that the proposed protocol increases the delivery probability and
reduces the average latency.

Session Chair

Zhi Liu (Shizuoka University, Japan)

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