The adoption of the IP protocol for serving diverse applications arises the need for mechanisms to prevent network congestion in scenarios with different traffic types (responsive and unresponsive) sharing limited network resources. To deal with this issue, a number of algorithms for active queue management (AQM) have been proposed. However, most of them do not observe the traffic type and usua...

Current TCP flow control depends on packet losses to find the workload that a network can support. Packet drops not only reduce TCP performance, but also add large transfer delay to the packets. Instead of dropping the overflowed packets, Explicit Congestion Notification (ECN) detects incipient congestion and notifies the sources to reduce their windows when the queue length exceeds a threshold...

Recently, many people enjoy accessing wireless network to conveniently collect their required information or happily surf within the Internet worldwide by exploiting wireless mobility, flexibility and availability. However, the more sessions accessing the channel, the more packet dropping rate. In this paper, we propose a polling access control scheme which in its PCF mode deploys non-preemptiv...

PRMA, a packetized multiple access scheme for transmitting over short range radio channels, is a promising scheme to implement in a cellular system. PRMA requires little central control and allows handovers with minimal base station intervention. However when mobile voice terminals move from one cell to another, they forfeit the slots reserved for them and, in addition, encounter hand-oo delays...

This paper presents a hardware based cache scheme to detect selfish nodes in mobile ad hoc network. In this scheme, the hardware monitors the activities of the upperlayer software and reports the misbehavior about the software to other mobile nodes in the network. The hardware cache stores the identity information of recently received packets. The detection mechanism uses the cache to tell the ...

In the course of last decade, wireless sensor networks (WSNs) have grabbed attention of both academic research community and industrial users. Such networks provide a broad range of applications, making them of great significance. Energy is the greatest concern of such battery-operated networks as it directly influences the lifetime of the network. As packet dropping due to congestion has a dra...

In this paper, we consider a robust networked control problem. We consider linear unstable and uncertain discrete time plants with a network between the sensor and controller as well as between the controller and plant. We investigate the effect of data drop out in the form of packet losses and we focus on the tradeoff between packet arrival rate versus the uncertainties of the system dynamics....

We study the problem of multi-agent optimization in the presence of communication failures, where agents are connected by a strongly connected communication network. Specifically, we are interested in optimizing h(x) = 1 n ∑n i=1 hi(x), where V = {1, . . . , n} is the set of agents, and hi(·) is agent i’s local cost function. We consider the scenario where the communication links may suffer pac...

In this paper, we consider a robust network control problem. We consider linear unstable and uncertain discrete time plants with a network between the sensor and controller and the controller and plant. We investigate the effect of data drop out in the form of packet losses. Four distinct control schemes are explored and sufficient conditions to ensure almost sure stability of the closed loop s...

A MANET (mobile ad hoc network) is a self-configuring infrastructure-less network of mobile devices connected through a wireless medium. All the devices in MANET can move independently in any direction and frequently change its link to other devices. Each device can act as both a transmitter and receiver therefore MANET doesn't require a fixed network infrastructure. Self-configuring abili...