Networking Humans, Robots and Environments


Nak Y. Chong

DOI: 10.2174/97816080573131130101
eISBN: 978-1-60805-731-3, 2013
ISBN: 978-1-60805-732-0

Indexed in: EBSCO.

This book dives into the heart of how to design distributed control architectures for heterogeneous teams of humans, robots, and autom...[view complete introduction]
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Extending Lifetime of the Network and Crucial Node by Multiple Diversity Combining

- Pp. 101-117 (17)

Lichuan Liu


We introduce the crucial nodes in sensor networks, whose energy consumption affects the network lifetime greatly. Due to the relative high traffic load at the crucial nodes, energy loss occurs when packet collision and/or retransmission. We propose a LMMSE collision separation technique by combining the space diversity provided by antenna array and network diversity provided by the Media Access Control (MAC) layer. In our solution, collided packets, at the collector, are not discarded but combined with network diversity on-demand to separate data packets from different users and improve the network performance. Using analysis and computer simulations, we demonstrate that the space and network diversity combining (SNDC) scheme for cross-layer and MMSE collision resolution is energy efficient.

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