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In this paper, we propose a multi-channel medium access control (MAC) protocol, named underwater multi-channel MAC protocol (UMMAC), for underwater acoustic networks (UANs). UMMAC is a split phase and reservation based multi-channel MAC protocol which enables hosts to utilize multiple channels via a channel allocation and power control algorithm (CAPC). In UM-MAC, channel information of neighboring...
With the development of mobile internet, wireless communications via mobile devices in the form of Delay Tolerant Networks (DTNs), becomes a hot research topic. One critical issue in the DTNs with social characteristics is that there could exist selfish nodes which are unwilling to forward messages from strangers and malicious nodes which intentionally impair normal communication. Although there are...
With the development of mobile internet, wireless communications via mobile devices, which is typically in the form of Delay Tolerant Networks (DTNs), becomes a hot research topic. One critical issue in the development of DTNs is the routing. Although there are a lot research works addressing routing issues in DTNs, they handle routing problem from only one or two aspects, which cannot produce an...
Bluetooth which operates in the 2.4 GHz ISM band provides short range, low cost, low power pico-cellular wireless connectivity. It intends to become the wireless personal area network standard itself. The Bluetooth specification proposes a round robin scheduler as possible solution for scheduling slaves in a Bluetooth piconet. However, this basic scheme performs badly under asymmetric traffic conditions...
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