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In this paper, we first propose a redundant radix based number (RBN)representation for encoding the data to be transmitted in a wireless network.This RBN encoding uses three possible values - 0, 1 and $\bar 1$, for eachdigit to be transmitted. We then propose to use silent periods (zero energytransmission) for transmitting the 0's in the RBN encoded data thus obtained.This is in contrast to most conventional communication strategies that utilizeenergy based transmission (EbT) schemes, where energy expenditure occurs fortransmitting both 0 and 1 bit values. The binary to RBN conversion algorithmpresented here offers a significant reduction in the number of non-zero bits inthe resulting RBN encoded data. As a result, it provides a highlyenergy-efficient technique for data transmission with silent periods fortransmitting 0's. We simulated our proposed technique with ideal radio devicecharacteristics and also with parameters of various commercially availableradio devices. Experimental results on various benchmark suites show that withideal as well as some commercial device characteristics, our proposedtransmission scheme requires 69% less energy on an average, compared to theenergy based transmission schemes. This makes it very attractive forapplication scenarios where the devices are highly energy constrained. Finally,based on this transmission strategy, we have designed a MAC protocol that wouldsupport the communication of such RBN encoded data frames.

A New Energy Efficient MAC Protocol based on Redundant Radix for Wireless Networks