For a wireless sensor network (WSN) with a large number of low-cost, battery-driven, multiple transmission power leveled sensor nodes of limited transmission bandwidth, then conservation of transmission resources (power and bandwidth) is of paramount importance. Towards this end, this paper considers the problem of power scheduling of Kalman filtering for general linear stochastic systems subje...

The provisioning of an appropriate level of perceptual speech quality is crucial for the successful deployment of Voice over the Internet Protocol (VoIP). Today’s heterogeneous multimedia networks include links that introduce bit errors into the voice data stream. These errors are detected by the IP packet transport protocol and result in packet losses which eventually degrade the speech qualit...

In this paper, we propose an enhanced packet scheduling scheme to favour UEs that experienced handover (HO) in wireless mobile networks. The main idea of the proposed scheme is not only prioritized the HO connections at the CAC level but also prioritized the HO connections at the scheduler level. At the CAC level, a guard code scheme favours HO calls over new calls. At the scheduler level, a Pa...

In the paper a general model for the transmission of layered video is introduced. The effect of packet dropping in different layers on the reconstruction of pictures is analysed. The application of unequal packet loss protection (UPLP) for layered video is proposed and the performance is investigated. An algorithm for the design of the UPLP parameters is described. The numerical analysis shows ...

The primary objective of event driven wireless sensor networks is to route the detected or monitored data at the earliest to the base station depending on their degree of priority since the data generated in a sensor network has different importance. In order to avoid indiscriminate dropping of data during congestion we propose a novel congestion protocol named priority based congestion detecti...

ATM-UBR switches respond to congestion by dropping cells when their buuers become full. TCP connections running over UBR experience low throughput and high unfairness. For 100% TCP throughput each switch needs buuers 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 buuers. The UBR+ service propose...

A new multiple access control (MAC) protocol for mobile wireless communications is presented and investigated. We explore, via an extensive simulation study, the performance of the protocol when integrating voice and data traffic over two wireless channels, one of medium capacity (referring mostly to outdoor microcellular environments) and one of high capacity (referring to an indoor microcellu...

Mobile ad hoc network is based upon multi-hop communication wherein the nodes themselves act as routers as well as source. The inherent characteristics of a MANET make it vulnerable to a variety of insider as well as outsider attacks. Most of the secure routing protocols do not focus on the insider attacks wherein certain adversarial nodes may launch a number of attacks on the routing protocol ...

In a multi-hop mobile ad hoc network (MANET), mobile nodes cooperate to form a network without using any infrastructure such as access points or base stations. The mobility of the nodes and the fundamentally limited capacity of the wireless medium, together with wireless transmission effects such as attenuation, multi-path propagation, and interference combine to create significant challenges f...

The traditional contract between the network and the lower layers states that the network does routing and the lower layers deliver correct packets. In a wireless network, however, different nodes may hear most bits in a transmission, yet none of them receives the whole packet uncorrupted. The current approach imposes fate sharing on the bits, dropping a whole packet because of a few incorrect ...