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The IEEE 802.15.4 and ZigBee protocol stack offers great potentials for ubiquitous and pervasive computing, namely for wireless sensor networks. However, there are still some open and ambiguous issues that turn its practical use a challenging task. One of those issues is the study of low power consumption of sensor device, which is the biggest issue in sensor network, still has many unresolved issues...
This paper presents an optimal beacon scheduling scheme using power control in cluster-tree network. A cluster-tree network conforming to the IEEE 802.15.4 standard is formed by several coordinators that periodically send beacon frames to the nodes of their cluster. However, if these periodic beacon frames are sent without any particular scheduling, they will collide with each other and those nodes...
In this paper, we proposed a new concept of BOP (beacon-only period) and relevant beacon scheduling mechanism that will avoid beacon conflicts between MEU (mesh-enabled USN) devices all of whom are transmitting their beacons. The beacon scheduling for the MEU devices makes all the devices of the overall network completely synchronized and operate in a stable manner. Moreover, the synchronization of...
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