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Mobile sink has been widely used in wireless sensor networks to balance energy consumption among sensor nodes and to prolong the network lifetime. But, as mobile sink moves, sensor nodes have to change their routes to mobile sink frequently, which results in a lot of energy consumption and also a very large transmission delay accordingly. Although using a static sink may lead to shorter network lifetime,...
Over the past years, location-based routing protocols have been studied extensively in mobile ad hoc networks (MANETs). However, how to efficiently provide the location information for nodes is still a challenge. So far, many protocols have been proposed to solve this problem, most of which offer exact routing location information, and are complicated to implement in practice. In this paper, we propose...
Mobile ad-hoc networks (MANETs) usually contain sparse or even empty regions called holes. The local optimum problem will occur when routing packets meet holes in the network. In this paper, we propose a novel hole-reshaping routing protocol (HRR) in large-scale MANETs. It effectively solves the hole problem by regularizing a hole with an ellipse, and then locally broadcasting the hole information...
Mobile sinks are used widely in wireless sensor networks to balance the load among sensors and improve the network lifetime. But, the data transmission delay becomes larger while mobile sinks are used. Although using a static sink has shorter lifetime than a mobile sink, it can get a relatively lower transmission delay. In order to balance the lifetime and the transmission delay of a wireless sensor...
To solve the network congestion problem, F.P. Kelly proposed proportional fair and classic Kelly model which can converge to proportional fair point with asymptotic stability. Based on it, many new flow control mechanisms were derived to improve its performance. However, Most of their convergence rates are linear since in classic Kelly model, link price is only positive. This paper presents an enhanced...
To get the global fairness in Internet, the Classic Kelly Model proposed by F.P.Kelly uses the utility function to optimize the data fluid control. The model gives two algorithms to control the data send rate. One is prime algorithm, and the other is dual algorithm. The two algorithms can converge to proportional global fair point. However, the two algorithms use only the positive price to feedback...
The traditional TCP Reno, TCP Vegas and many other TCP variants used in wire network can not perform well in ad hoc environment. Because ad hoc network usually uses wireless channel and it has not the base station. And more, the ad hoc node can be mobile. The mechanism of detecting congestion by packet losses can not be valid. In ad hoc network, temporary link outages or fading-induced bit errors...
Ad hoc network is network in which there is no base station and any node can be connected to network temporarily. To support mobility, Node in ad hoc network generally communicates by wireless channel. In Ad hoc network, TCP Reno or TCP Vegas do not work well as they do in wire network, because they take packet losses or timeout as the signal of congestion. However, in ad hoc network, temporary link...
Wireless mesh networks (WMNs) have been proposed to provide rapid deployment and easy reconfiguration of wireless broadband communications. WMNs can interoperate with WiMAX, Wi-Fi, sensor, or cellular networks in the hybrid working environments to relay packets robustly among these heterogeneous networks and significantly extend the coverage of individual wireless access networks. Many recent studies...
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