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In order to ensure that the message is fresh, both the identity of the communication and the shared key in the session are reliable, while avoiding the defects of the old message retransmission attack and identity posing in the native NS protocol, the optimized protocol adopts the means by which the receiver communicates with the key distribution center, and add the sender's identity and the temporary...
Considering increasing number of hybrid and electric vehicles, a growing number of car-pedestrian accident become a problem because these vehicles are virtually silent at low speeds where tire noise is not significant. To cope with this problem, a real-time approaching vehicle detection technique for pedestrians using acoustic digital communication is proposed. In this technique, a vehicle transmits...
In this paper, we show some experimental results of a proposed distance estimator based on the received signal strength indicator. We provide a fact that the proposed estimator outperforms the conventional one with respect to a theoretical analysis, computer simulations and experimental results.
Visible light communication (VLC) offers the usage of visible light for data transmission as well as illumination, and is suitable for vehicle-to-vehicle/infrastructure-to-vehicle communication. However, existing VLC systems require high-speed camera to achieve high data rate. To achieve VLC with sufficient data rate using commercial devices (e.g., smartphones), VLC using low-speed image sensor and...
Transmission techniques based on channel coding with feedback are proposed in this paper to enhance the security of wireless communications systems at the physical layer. Reliable and secure transmission over an additive noise Gaussian wiretap channel is investigated using Bose-Chaudhuri-Hocquenghem (BCH) and Low-Density Parity-Check (LDPC) channel codes. A hybrid automatic repeat-request (HARQ) protocol...
In this paper a physical layer transmission method based on the channel prediction and users quality-of-service(QoS) is proposed. The time-varying Rayleigh fading channel is predicted by back propagation neural network (BPNN), which will serve as judging whether the system secure transmission capacity is redundant. Then a scheme to choose the best physical layer security coding under the secure transmission...
Information-centric networking (ICN), a strong candidate for future internet architecture, consists of two kinds of packets, interest and data packets, both of which carry the name of data content to be requested (or delivered). The data packet is associated with a public key signature so that the data receiver can verify the data packet's correctness, integrity and provenance. Certificate-based signature...
Wireless power transfer (WPT) via magnetic resonance coupling has gathered attentions because of its high transmitting efficiency and robustness to misalignment. The efficiency characteristics of the WPT system are expressed by kQ product, which is given by coupling coefficient and quality factors of a transmitter and receiver. However, a conventional measuring method of the kQ product is quite burdensome...
To satisfy the requirements of complex distributed power electronic system (PES) communication, this paper has proposed a single optic-fiber link data communication protocol based on the Manchester code due to an vacancy in the commonly-adopted protocols, analyzed the encoding and decoding principle of Manchester code, defined the formats of command frame and data frame, calculated the communication...
In this paper, we propose a full optical wireless bidirectional communication system based on infrared (IR) and Visible Light Communication (VLC) for indoor health monitoring assuming patient mobility inside the indoor environment. Based on ray tracing methods and statistical approach for evaluating channel gain of both links, we determine a global performance in terms of outage probability. Our main...
In the past, most of the drone was developed for military use, but recently it has been rapidly growing into industrial and civilian markets due to its potential to be applied to various fields. The industry of drones is attracting attention as a model of manufacturing and service convergence, creating synergy by converging with information technology and various services. However, the operating time...
Most of IoT applications include large number of distributed sensors which are interesting in specific geographical area. A large number of IoT entities have multiple relations and dynamic connections with each other. And there are many group communication requirements. Flexible multicast mechanism will be essential in such environments but it is difficult to satisfy verious requirements by means...
This paper presents a novel centralized cooperative scheme which combines compressed sensing (CS) method based on the analog-to-information converter (AIC) with statistical and graphical chi-square Quantile-Quantile (QQ) plot detector. The received signal at every cognitive radio (CR) user in the presence of Additive-White-Gaussian-Noise (AWGN) and intentional interference attack signal (jamming)...
Power Line Communication (PLC) channel is a very challenging environment, this is due to the fact that severe impairments adhering this medium. A more realistic and accurate noise model based symmetric alpha-stable distribution (SαS) is considered in this paper to better fit the properties of real noise inherent in power grid system. In this paper we study the impact of the degree of impulsiveness...
In this paper, we investigate the state of the art for the deployment of ECN (Explicit Congestion Notification) on the Internet from a different viewpoint. We carefully choose four data sets as the hosts to be tested. We negotiate an ECN-Capable and a Not-ECN-Capable connections with each host and collect all packets belonging to the connections. By analyzing the TCP/IP header fields of packets belong...
This paper considers a wireless power transfer system with multiple antennas by using the multicarrier signal waveforms. A prior art optimizes the waveform with the channel state information at the transmitter (CSIT) to improve the energy harvesting efficiency of the receiver with the non-linear model. The impact of the imperfect CSIT on the energy harvesting capability is studied as a function of...
An offset quadrature amplitude modulation (OQAM)-filterbank based multicarrier (FBMC) has been attracted and nominated as one of new waveforms for 5G communications due to its capability of frequency selectivity, robustness to carrier frequency offset (CFO) and omission of cyclic prefix (CP). Regardless of these advantages, many researchers have claimed pros and cons for the usage of FBMC, among those...
Inductive loosely coupled wireless power transmission (WPT) system is characterized by heterogeneous magnetic field of the transmitter. The voltage at receiver's output varies with position of the receiver, with design of the receiver's LC tank circuit, and with the load resistance. This paper measures the impact of these three parameters on receiver's output voltage and output power. Paper also evaluates...
With the increase in population and automobiles, the traffic jam in urban areas is becoming a critical issue. These traffic jams especially at the intersections not only increase the delay for drivers, but also increase fuel consumption and the air pollution. The fixed-time traffic light controller is one of critical factors that affect the traffic flow at intersections. This paper proposes a new...
This paper investigates the energy harvesting fading multiple-access channels, where the transmitters harvest random amounts of energy from the environment and the data transmissions are subject to statistical quality of service (QoS) constraints in the form of limitations on the buffer overflow probability. With the assumption that the channel state information (CSI) and harvested energy in all time...
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