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IEEE 802.11 specifies a Power Saving Mode (PSM) in order to save the consumption of energy or power for mobile stations in wireless ad hoc networks. Following the standard of PSM, a number of studies [1–5] further discussed the wake-up/sleep scheduling of beacon intervals based on Quorum systems so that any communication pair of stations has common awake intervals for data exchange. However, most...
A Wireless Sensor and Robot Network (WSRN) is composed of a set of sensors and robots. Compared with the traditional Wireless Sensor Network (WSN), the WSRN has added characteristics, such as the mobility of robots. The mobility of robots has been proven to be quite useful in prolonging the network lifetime of the monitoring environment. However, mobility is a major part of the energy consumption...
Multi-channel MAC protocols have attracted much attention because they possess the ability to boost the capacity of wireless ad hoc networks. In previous works, a lot of multichannel protocols, such as DCCB[1-2], HB[4], and SB[5-7], have been proposed to cope with the rendezvous problem and efficiently utilize the bandwidth resources. However, these protocols might cause the channel traffic unbalance...
Target Coverage is an important issue in Wireless Sensor Networks (WSNs). This work copes with the target coverage problem which dispatches a set of mobile sensors to targets efficiently. Given disconnected targets with different Quality of Monitoring (QoM) in the networks, the mobile sensors are distributed randomly in the networks and are not able to communicate each other since the distance is...
Wireless Visual Sensor Networks (WVSNs) consist of a set of camera sensor nodes each of which equips with a camera and is capable of communicating with the other camera sensors within a specific distance range. As an extension of wireless sensor networks (WSNs), the WVSNs can provide richer information such as image and picture during executing targets monitoring and tracking tasks. Since the sensing...
Recently, many location-aware routing protocols have been proposed to overcome the obstacles and construct the shortest route which minimizes the end-to-end delay and saves overheads for packet forwarding. However, most of them require accurate location information which is difficult to obtain. Another problem of existing location aware routing is that the sensor nodes located on the best route will...
IEEE 802.11 specifies a Power Saving Mode (PSM) in order to save the energy consumptions of mobile hosts. Following the standard of PSM, a number of studies [1–4] further discussed the wakeup/sleep scheduling of beacon intervals based on Quorum systems so that any communication pair of hosts has common awake intervals for data exchange. However, most of them did not take into consideration the fact...
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