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In indoor localization, it is crucial to guarantee a high level of accuracy for various location-based services. An ultrasonic technique is one of the best candidates to meet this need because it is capable of performing precise distance measurements as well as enabling nonintrusive localization that requires no receiver to be carried. Nevertheless, its applicability is severely limited by the fact...
Now a days, human life should be more convenient because various service can provide by progress of ubiquitous computing environments. A lot of networks compose of ubiquitous computing environment and a lot of collected data from these networks must be process to united data format for user application but unity of the collected data from heterogeneous networks is impossible to establish. To alleviate...
The goal of this paper is to propose a way to processing data from service providing networks using reputation mechanism to user application in agent-based network environment. In this process, it must concern about a lot of sensor network because sensor networks are quite different about data format, protocol, and so on. To alleviate this heterogeneity, we propose data integration mechanism that...
Sensor networks consist of various sensors and have a constraint depend on its physical characteristics. The sensor network middleware can provide with abstractions of characteristics about each sensor network to user applications. Thereby, these sensor networks can cooperate easily with traditional network through sensor network middleware platform. In this manner, agents in platform interact with...
Sensor networks locally form the variety sensor network as base for diverse sensors. Pre-existing development of sensor network has the problem about the processing in accordance with unit and representation of method because it does not have the common data format. Also, it has the difficult to share the data with different sensor networks. Development of middleware that can share the diverse raw...
Sensor network has many limitation such as computing power, storage capacity, and battery. It makes hard to federation and communication each sensor networks because they use different data format depend on their characteristics. Thereby, it needs to middleware that can merge raw data from heterogeneous sensor networks. For that reason, we propose agent based sensor network middleware that able to...
Sensor networks consist of various sensors. Existing development of sensor networks is hard to federation and communication each other because they use different data format depend on their characteristics. Thereby, it needs to middleware that can merge raw data from heterogeneous sensor networks. For that reason, we propose sensor network middleware that able to translate sensed data from sensor...
The goal of wireless sensor networks is to collect sensing data on a specific region using wireless communication. The sink node gathers all local sensing data, processes them, and transmits them to users who use sensor networks. Generally, sensor nodes are low-cost, low power devices with limited sensing, computation and wireless communication capabilities. A sensor network applies to multi-hop communication...
In sensor network, energy efficiency and reliable data are very important factor, because sensors have limitation such as amount of battery, capacity of memory, and computation power. Thereby, most of sensor network consider sensor's limitation. For this reason, we propose efficient routing scheme that merges Low Energy Adaptive Clustering Hierarchy (LEACH) protocol and Directory Facilitator (DF)...
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