Daeyoung Kim

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Abstract— We propose a management framework for sensor networks based on the standard service discovery protocol, UPnP. Using UPnP, we can achieve easy deployment of sensor network services and provide zeroconfiguration sensor networking. Since sensor nodes are highly resource limited, it is not feasible to accommodate UPnP protocol in each sensor node.(More)
The wireless and resource-constraint nature of a sensor network makes it an ideal medium for attackers to do any kinds of vicious things. In this paper, we describe PLUS, a parameterized and localized trust management scheme for sensor networks security, where each sensor node maintains highly abstracted parameters, rates the trustworthiness of its(More)
Wireless sensor networks are prone to security attacks, which are either common to conventional networks or unique for themselves due to the resource-constraint, susceptibility to physical capture, and wireless nature. Security solutions using crypto schemes are not enough, and sometimes not efficient. In this paper, we develop a security framework with(More)
ZigBee is the emerging industrial standard for ad hoc networks based on IEEE 802.15.4. Due to characteristics such as low data rate, low price, and low power consumption, ZigBee is expected to be used in wireless sensor networks for remote monitoring, home control, and industrial automation. Since one of the most important goals is to reduce the(More)
In an integration system of RFID and wireless sensor network (WSN), RFID is used to identify objects while WSN can provide context environment information of these objects. Thus, it increases system intelligent in pervasive computing. We propose the EPC sensor network (ESN) architecture as an integration system of RFID and WSN. This ESN architecture is(More)
This demonstration shows IEEE 802.15.4a CSSbased localization system for wireless sensor networks. IEEE 802.15.4a CSS technology can provide high accurate ranging functionality to a sensor node. However, as it measures a distance based on Time-of-Flight(TOF) of RF signal, the system needs well designed ranging and report protocol. So, in this demonstration(More)
In this paper, we propose the cluster-based hierarchical time synchronization protocol (CHTS) for wireless sensor networks (WSN). To couple the network with real world tightly, we provide a network-wide time synchronization through the introduction of abstractions for cluster and hierarchy. Generally the error of time synchronization has the tendency of(More)
The ZigBee tree routing is widely used in many resource-limited devices and applications, since it does not require any routing table and route discovery overhead to send a packet to the destination. However, the ZigBee tree routing has the fundamental limitation that a packet follows the tree topology; thus, it cannot provide the optimal routing path. In(More)