Radio link quality estimation in low-power wireless networks
Ref: CISTER-TR-131102 Publication Date: Jul 2013
Radio link quality estimation in low-power wireless networksRef: CISTER-TR-131102 Publication Date: Jul 2013
Stringent cost and energy constraints in low-power wireless networks (such as wireless sensor networks) impose the use of low-cost radio transceivers that transmit low-power signals (typically, 0 dBm as maximum power). This fact limits the radio channel, making it more vulnerable to noise, interference, and multipath distortion.
Moreover, these radio transceivers typically rely on inexpensive and size constrained antennas. Often, infeasibility of prime antenna positioning further compromises its performance. This applies to both, antenna positioning in certain WSN node designs as well as node placement in deployments, leading to aniso- tropic connectivity.
Consequently, low-power radio links are extremely unreliable and often unpredictable. They experience quality fluctuation over time and space, and show asymmetric connectivity. The unreliability of links greatly affects the network performance. This raised the need for link quality estimation as a fundamental building block for network protocols and mechanisms (e.g., medium-access con- trol (MAC), routing, mobility management, and topology control), in order to mitigate link unreliability.
Link quality estimation in low-power wireless networks is a challenging research problem due to the lossy and dynamic nature of the links. This book aims at providing a good understanding of several aspects of link quality estimations, which covers the design, evaluation, experimentation, and impact on higher layer protocols.
Book Springer Lecture Notes in Electrical Engineering, 147 pages.