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To take advantage of the broadcast nature of wireless communication, a number of opportunistic routing techniques have recently been proposed. In order to manage the extra signaling overhead associated with operation of the opportunistic routing, these schemes work in terms of 'Batches' consisting of multiple packets. While these opportunistic techniques can dramatically improve the system performance, use of batches means that they are best suited to UDP traffic. In the Internet and wireless networks, however, the vast majority of the traffic is interactive (e.g., up to 80-90% is TCP). To support interactive traffic opportunistically and efficiently, the authors introduce a novel scheme called RIPPLE.
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