Deployment and experimental verification for the data communication in heterogeneous wireless networks

With the growing interest in various wireless networks, the need for seamless connection and interoperability of heterogeneous wireless networks is becoming increasingly important. In this research, we focus on deploying the heterogeneous wireless networks, which consists of Wi-Fi networks and ZigBee networks. In heterogeneous wireless networks, data communication between pair of a sensor node and a mesh node is essential, meaning that the sensor node may receive data from the Wi-Fi device, and vice versa. We conduct some experiments to test and verify the interoperability issues, i.e., the coexistence radio interference and addressing of the heterogeneous wireless networks. We also investigate the effect of background traffic on the performance of heterogeneous wireless networks. The results reveal that both round-trip delay and packet loss increase as the background traffic increases

Development of a 2D communication sensor network using a single carrier frequency for both power and data transmission

Two-dimensional (2D) communication is a novel physical communication form that utilizes the surface as a communication medium to provide both data and power transmission service to the sensor devices placed on the surface's top. In previous works, we developed 2D communication systems that utilize separated channels for data and power transmission. Though this assignment of different channels can achieve strong network performance, the sensor devices must be equipped with two or more interfaces to simultaneously receive the power and data signals, which significantly complicates and enlarges those devices. Moreover, when a channel is used for the power supply, it not only continually monopolizes the wireless frequency resource, it is also likely to cause interference with the other signal source in the case of the input power continually being sent out above a certain level. In this paper, we develop a novel 2D communication sensor system by using a single-carrier frequency for both power and data transmission, equipped with the wireless module for the two together in a compact body. To enable a sensor node that concurrently receives energy and data communication, we propose an enhancement scheme based on the IEEE802.15.4 MAC protocol standard. Through both computer simulation and actual measurement of the output power, we evaluate the performance of power supply and data transmission over the developed 2D communication sensor system

An efficient power supply system using phase control in 2D communication

The two-dimensional (2D) communication is a novel physical form of communication that utilizes the surface as a communication medium to provide data communication and power supply services to the devices placed on top of it. In the previous works, we have developed 2D communication systems that allow the devices to simultaneously perform both data and power transmission wherever it is placed on the 2D sheet. Instead of spreading the microwave thoroughly in the thin 2D sheet, we can also concentrate it only on the place where the device is put, by adjusting the phase of the multiple input signals. To largely strengthen the efficiency of power supply in the 2D communication, in this paper, we build up an efficient power supply system by using phase control to converge the microwave on a specific area in the 2D sheet, and evaluate its performance by measuring the output power over the developed 2D communication system

2D communication sensor networks using single frequency for concurrent power supply and data transmission

Two-dimensional (2D) communication is a novel physical communication form that utilizes the surface as a communication medium to provide both data and power transmission service to the sensor devices placed on the surface's top. In previous works, we developed 2D communication systems that utilize separated channels for data and power transmission. Though this assignment of different channels can achieve strong network performance, the sensor devices must be equipped with two or more interfaces to simultaneously receive the power and data signals, which significantly complicates and enlarges those devices. Moreover, when a channel is used for the power supply,it continually monopolizes the wireless frequency resource. In this paper, we develop a novel 2D communication sensor system by using a single-carrier frequency for both power and data transmission, equipped with the wireless module for the two together in a compact body. To enable a sensor node that concurrently receives energy and data communication, we propose an enhancement scheme based on the IEEE802.15.4 MAC protocol standard. Through both computer simulation and actual measurement of the output power, we evaluate the performance of power supply and data transmission over the developed system

A concurrent power supply and data transmission protocol for 2D communication sensor system

The two-dimensional communication system (2DCS) is a novel technology that allows the surface physical as a communication medium for providing simultaneous power supply and data transmission to any device. However, how to carry out simultaneous power supply and data transmission in an efficient manner is still an open issue for 2DCS.In this paper, we propose a concurrent power supply and data transmission protocol based on the modifications of IEEE 802.15.4 MAC protocol standard, and then propose a generic rechargeable battery model by considering the features of 2DCS. Simulation results reveal that our proposed scheme highly improves the energy charging efficiency of 2DCS