Jae-Seok Bang

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—In this paper, we consider the construction of a large scale wireless sensor network (WSN) by means of distributed network association with scalability. We design a network association mechanism that allows each router to have its own addressing space for unique addressing of its child nodes based on a pre-initialized addressing tree. We also design a(More)
—In this paper, we consider interference mitigation in IEEE 802.15.4 beacon-enabled cluster-tree networks. The proposed scheme first detects the presence of interference by means of packet-error detection and/or channel sensing in a cluster-wise manner. In the presence of interference, the coordinator (or cluster head) fast notifies the presence of(More)
—Wireless sensor networks (WSNs) need to employ a network association mechanism that can securely allocate a unique address to each node while minimizing energy consumption. However, conventional centralized and broadcasting based network association mechanisms may consume large energy, and distributed network association mechanisms may suffer from(More)
One of key issues in the construction of a large-scale wireless sensor network (WSN) is how to securely allocate a unique address to each node in an energy-efficient manner. However, conventional network configuration mechanisms may suffer from energy inefficiency and/ or addressing failure problem when applied to the construction of large-scale WSNs. In(More)
In this paper, we consider traffic handling tech­ niques for the enhancement of quality of service (QoS) in data transmission of IEEE 802.15.4 networks. IEEE 802.15.4 networks employ a hybrid medium access control scheme for the data transmission, which comprises contention access period (CAP) and contention free period (CFP). We make end devices select the(More)
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