In Wireless Sensor Networks (WSNs) the existence of malicious nodes is a serious challenge. Malicious nodes increase the traffic by sending distrusted messages. In this paper, we present CCTF: a congestion control protocol based on trustworthiness of nodes in WSNs using fuzzy logic. Through the use of CCTF, each node reduces malfunctioning neighbour(s) effects via dropping valueless packets and...

Abstract : Video streaming demands high data rates and hard de−lay constraints, and it raises several challenges on to−day’s packet−based and best−effort internet. In this paper, we propose a simple multiple−description coding (MDC) technique based on sub−sampling and cubic−spline interpolation to provide spatial diversity, such that no additional buffering delay or storage is required. Analysi...

ATM-UBR switches respond to congestion by dropping cells when their bu ers become full. TCP connections running over UBR experience low throughput and high unfairness. For 100% TCP throughput each switch needs bu ers equal to the sum of the window sizes of all the TCP connections. Intelligent drop policies can improve the performance of TCP over UBR with limited bu ers. The UBR+ service propose...

Linear Increase/Multiplicative Decrease (LIMD) has typically been the congestion control paradigm of choice in the traditional Internet with tail-drop routers. In recent years, routers with fair packet dropping policies (e.g., RED) are increasingly being deployed in the Internet. In the context of a network with fair packet dropping routers, we challenge the popular notion that Linear Increase/...

Providing quality-of-service (QoS) guarantees over wireless packet networks requires thorough understanding and quantification of the interactions among the traffic source, the wireless channel characteristics, the underlying link-layer error control mechanisms, and the various packet dropping policies adopted by the upper network layers. In this work, we explore the idea of incorporating betwe...

A Disruption tolerant networks is a network designed temporary, have the unique features of intermittent connectivity which makes routing quite different from other wireless network. Routing misbehavior like selfish or malicious node can cause packet delay and modifying packets in a network. A node is required to keep a few signed contact record of its previous contact based on it the next node...

Quality-of-Service(QoS) is a set of service requirements to be met by the network while transporting a data flow in real-time communication systems. Many real-time sources generate traffic with variable rates. In this paper, we studied a class of soft real-time applications whose bandwidth requirements are random variables. We defined two models for soft real-time communications: the dropping m...

Active Queue Management is a convenient way to administer the network load without increasing the complexity of end-user protocols. Current AQM techniques work in two ways; the router either drops some of its packets with a given probability or creates different queues with corresponding priorities. Head-toTail introduces a novel AQM approach: the packet rearrange scheme. Instead of dropping, H...

In this paper we address the issue of contention resolution in optical burst switched networks, and we introduce an approach for reducing packet losses which is based on the concept of burst segmentation. In burst segmentation, rather than dropping the entire burst during contention, the burst may be broken into multiple segments, and only the overlapping segments are dropped. The segmentation ...

In this paper we address the issue of contention resolution in optical burst switched networks, and we introduce an approach for reducing packet losses which is based on the concept of burst segmentation. In burst segmentation, rather than dropping the entire burst during contention, the burst may be broken into multiple segments, and only the overlapping segments are dropped. The segmentation ...