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Applicability of Bluetooth routing ad-hoc networks for efficient communication.
(International Research Symposium on Pure and Applied Sciences, 2017 Faculty of Science, University of Kelaniya, Sri Lanka., 2017) Jayawardena, B.
In the age of Internet of Things, we expect devices other than computers to communicate with similar or different types of devices. These devices have to be designed in a specific way to communicate and achieve a predefined set of objectives. Hence, the devices need to be aware of with whom they should communicate and what, with what infrastructure and operational environments such as cars, door-locks, refrigerators, health information devices which could create intelligent systems that communicate over the Internet with information/computer systems. On the road, cars may move in a lane one after the other, swiftly engaging in lane changes, slowing down through intersections, accelerating when required, turning left and right after each block. If these vehicles can continuously communicate with each other to exchange status updates on its movement and drivers’ actions, smooth operation of vehicles on roads could become a reality. Cars need to know who is behind them, front of them, and passing them, in order to send messages forward, backward or around each one of them. The study describes two instances (event of braking and road condition of a location) where cars communicate depending on information collected through ad-hoc networks, built upon sharing critical information and a selection of topologies and protocols depending on the objective of the network. The study proposes Bluetooth routing ad-hoc network to provide conceptual framework for dynamic ad-hoc networks where a set of devices can quickly form in a network based on their relative position, continue to maintain the network as new nodes join and leave, and disband once the objective of the network is accomplished. Specialty of this situation is that each node should know who are directly nearby or next to them, and from which direction, in order to communicate specific messages, and when required, a node should be able to reach a group of nodes in a given direction, but out of direct communication range, through intermediary nodes that route communications. A signal such as Wi-Fi would reach longer distance than Bluetooth, confusing this critical discovery process by reaching irrelevant devices faraway. Currently, this area has not been studied specifically. Concept was validated by having a group of devices arranged in a line, being able to discover each other, communicate with each other based on their relative physical positon in the group, and pass simple messages between them. Bluetooth communication uses low power radio signals in a limited range, compared to strong Wi-Fi signals that travel longer distances. Bluetooth ad-hoc routing networks can handle discovery and peer negotiations efficiently and even let stronger, long-distanced Wi-Fi signals make communication between the nodes where required, based on the established Bluetooth ad-hoc network.
An Attempted Crowd and Floor Management System
(Department of Statistics & Computer Science, University of Kelaniya, Sri Lanka, 2016) Bandara, R.M.C.; de Silva, L.N.B.; Bandara, D.D.M.M.; Silva, R.L.C.; Guruge, I.
This research article represents a system which enhances crowd handling and floor management techniques created with the assistance of Closed-Circuit Television (CCTV) and proximity beacons (BLE). With an aid of a desktop application crowd at a particular event/party will be observed with the use of CCTV cameras, which contains a video surveillance system. Video processing will also be used to keep track of a specific number of people roaming around an area and to make sure that no one enters any restricted areas. The visitors who arrive into a particular event will have a mobile application, which would guide them to navigate throughout an entire area and make sure that they do not visit any restricted areas. Bluetooth low energy (BLE) Proximity beacons will be used send signals throughout the generated map containing stalls Via Bluetooth; it also indicates the restricted areas on the map with the aid of the mobile application. This system will be beneficial for both organizers and visitors, organizers will finally find it easy to keep track of people and the visitors will be able to visit the areas they wish to without any difficulty.
Simultaneous control of multiple line-loads each connected separately in series with a designed unit (Control using Radio Frequency and a Mobile device)
(2016) Cooray, B.N.P.; Perera, W.S.K.; Kalingamudali, S.R.D.
A unit which can be connected separately in series with each load to control multiple line-loads simultaneously using Radio Frequency (RF) and a mobile device has been developed during this study. Series connected remotely controllable regulators are not widely available commercially and the few available do not have the facility to control the multiple line loads using a mobile application along with a RF remote controller and also they are very expensive and even require an alternative wiring system. The designed regulator provides the convenience of controlling the current flow through appliances connected to a single line power supply. A triac is used to control the power supplied to the load, since it can control the current flow in both halves of an AC current. The gate terminal is triggered by using a diac. A Switch Mode Power Supply, powers the active components of the regulator using the voltage drop across the triac. The Bluetooth (HC-06) and RF (315 MHz RF receiver) modules are programmed to receive inputs from the user to switch ON/OFF or control the voltage supplied to appliances such as fans and light bulbs. The Graphical User Interface enables the user to control the appliances easily and much faster than in normal usage of mechanical switches. The timer which allows the user to define time intervals for predefined output levels, can set desired levels of outputs for the appliances. This feature is not currently available in normal regulators. The suggested method facilitate simultaneous use of RF and the mobile devices as well as the ability to control several appliances with a single unit enabling energy conservation and ease of use. The cost of designing the unit with discrete components being less than US$ 17, it can be concluded that the model is cost effective since this method suggests two modes of control of the appliances along with timer settings. [1-9].

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