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We propose a real-time message scheduling algorithm which is applied to schedule periodic real-time messages in IEEE 802.15.4 for LR-WPAN (low rate wireless personal area network). The standard allows GTSs (guaranteed time slots) in the optional use of a superframe structure in a beacon-enabled network to be used to exchange real-time messages. To utilize(More)
— 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 zero-configuration sensor networking. Since sensor nodes are highly resource limited, it is not feasible to accommodate UPnP protocol in each sensor node. Thus, the(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)
Despite the popularity of current radio frequency identification (RFID) and wireless sensor networks (WSN), current research fails to propose the global vision that is needed for truly pervasive computing. In this paper we introduce our effort to build a global standard infrastructure for WSN and RFID based on the EPCglobal standard architecture framework.(More)
—Industrial applications of wireless sensor networks require timeliness in exchanging messages among nodes. Although IEEE 802.15.4 provides a superframe structure for real-time communication, a real-time message-scheduling algorithm is still required to schedule a large number of real-time messages to meet their timing constraints. We propose a(More)
— In this paper, we present a UPnP-ZigBee internetworking architecture. Different from traditional internetworking architectures which focus on integrating either wired networks or single-hop wireless networks into UPnP networks, integrating ZigBee with UPnP is more difficult because ZigBee nodes communicate over multi-hop wireless network, and further(More)