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When we apply U-CIMAN to LTE spectrum tenancy measurement, the experiments are conducted in two setups. In the first experiment setup, we use U-CIMAN to measure the spectrum usage of an LTE system fully under our control, as shown in the figure, where the LTE system is composed of Amarisoft LTE users and network devices. In the second setup, U-CIMAN is applied to measure the commercial LTE cell with the best signal strength near our lab.
Read more »The Semi-Markov Smooth (SMS) mobility model is a novel mobility model in which each SMS movement contains a random number of equal-length time steps. In each SMS movement, a node will randomly select a target direction φα and a target speed vα as the expected direction and speed of the movement. And the node experiences a random pause time after each SMS movement.
Read more »Our main objective is to realize the implmentation of Self-TunEd Performance and Protection (STEP2) management system for wireless LANs. Although, the architecture of STEP2 is generalized in the way that it can be used for any kind of wireless networks, however, as a case study, we are evaluating STEP2 in wireless LAN settings. Further, we aim to carry-out experiments in different scenarios, such as under good and poor links, with multiple clients and mobile clients settings.
Read more »A Personal INdoor Sensor (PINS) network is a wireless sensor network deployed in-homes or in-buildings to monitor the indoor conditions and the humadaily behavior. Sensor nodes are usually equipped with passive infrared (PIR), temperature, acoustic sensors that can capture unpredictable conditionand behaviors. Nodes communicate via wireless links in a multi-hop fashion. Placement/orientation of these sensor nodes should be carefully designed to sense entire field of interest.
Read more »Ad-hoc networks, are characterized as a self-organizing system of wireless devices requiring no pre-established infrastructure. Therefore, they are being envisioned for real-time applications such as communications for moving vehicles as in vehicular networks. Since in ad-hoc networks, intermediate nodes act as routers in forwarding messages between nodes, routing protocols play an invaluable role for data transmissions. Therefore, it becomes necessary to have better understanding of the performance of existing routing protocols for ad-hoc networks.
Read more »The Distributed Energy Storage Device (DESD) is one of the essential components in future Smart Grid. The DESD is composed with one or more battery packs, with each pack equipped with a micro-controller to implement battery status monitoring (e.g., temperature), and operation control (e.g., charge/discharge). An ARM-based embedded system gathers information from multiple battery packs reside in one house, and sends the aggreatated information to a higher level control center. As the battery packs may change in their number, size, and location, wireless communications between micro-controllers and ARM board fits better than any wired one.
Zigbee is used in our implementation, because : 1. it is efficient in terms of power consumption; 2. it is peer to peer so no extra Access Point is needed; and 3. it is widely used in industry as the implementation of "smart appliances" and thus may be seamlessly combined with them whenever necessary.