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The IEEE 802.15.4 standard enables device level wireless connectivity in personal area networks. Its medium access control (MAC) protocol supports the exclusive use of a wireless channel through guaranteed time slots (GTS). However, the bandwidth underutilization problem occurs in GTSs when the used bandwidth is less than the available. In addition to the standard GTS allocation scheme, two other...
The IEEE 802.15.4 standard enables device level wireless connectivity in personal area networks. Its medium access control (MAC) protocol supports the exclusive use of a wireless channel through guaranteed time slot (GTS). However, the bandwidth underutilization problem occurs in GTSs when the used bandwidth is less than the available. In this paper, a new GTS scheme is presented to allow more devices...
This paper reports our ongoing work on a new end-to- end available-bandwidth measurement tool: FEAT (fish-eye available-bandwidth tool). FEAT features a new dynamic pattern of probes called a fisheye stream. One fisheye stream covers a range of packet probing rates. A fisheye stream consists of a focus region, where the probing rates are sampled more frequently and the number of packets used at each...
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