【文件属性】：
文件名称：Robust Topology Control for Indoor Wireless Sensor Networks
文件大小：3.84MB
文件格式：PDF
更新时间：2011-10-25 10:45:59
wireless sensor
Topology control can reduce power consumption and chan-
nel contention in wireless sensor networks by adjusting the
transmission power. However, topology control for wire-
less sensor networks faces signi cant challenges, especially
in indoor environments where wireless characteristics are
extremely complex and dynamic. We rst provide insights
on the design of robust topology control schemes based on
an empirical study in an oce building. For example, our
analysis shows that Received Signal Strength Indicator and
Link Quality Indicator are not always robust indicators of
Packet Reception Rate in indoor environments due to sig-
ni cant multi-path e ects. We then present Adaptive and
Robust Topology control (ART), a novel and practical topol-
ogy control algorithm with several salient features: (1) ART
is robust in indoor environments as it does not rely on sim-
plifying assumptions about the wireless properties; (2) ART
can adapt to variations in both link quality and contention;
(3) ART introduces zero communication overhead for ap-
plications which already use acknowledgements. We have
implemented ART as a topology layer in TinyOS 2.x. Our
topology layer only adds 12 bytes of RAM per neighbor
and 1.5 kilobytes of ROM, and requires minimal changes to
upper-layer routing protocols. The advantages of ART have
been demonstrated through empirical results on a 28-node
indoor testbed.