The communication between network nodes within different protocol domains is often regarded simply as a black box with unknown configuration conditions in the path. We address network heterogeneity using a white box approach and focus on its interconnection processes. To achieve this purpose, a Performance Analysis Framework (PAF) is proposed which is composed of the formalization of the latter...

In this paper, a low order recursive linear prediction method and recursive least square as an adaptive filter (LP-RLS) are introduced to predict the speech and the excitation signals. In real-time packet-based communication systems, one major problem is misrouted or delayed packets which results in degraded perceived voice quality. If packets are not available on time, the packet is known as l...

In this paper, we design and formulate a trust-based routing protocol for secure transactions, such as military and disaster relief operations, banking in mobile ad hoc networks (MANETs). The proposed approach is showing the idea of a trust model in the network layer of MANET.AODV is ad hoc on demand distance vector, this protocol starts the route specially when some node claims to send data. I...

The IETF has developed a one-way packet loss metric that measures the loss rate on a Poisson and Periodic probe streams between two hosts. However, the impact of packet loss on applications is, in general, sensitive not just to the average loss rate but also to the way in which packet losses are distributed in loss episodes (i.e., maximal sets of consecutively lost probe packets). This document...

The IETF has developed a one-way packet loss metric that measures the loss rate on a Poisson and Periodic probe streams between two hosts. However, the impact of packet loss on applications is, in general, sensitive not just to the average loss rate but also to the way in which packet losses are distributed in loss episodes (i.e., maximal sets of consecutively lost probe packets). This document...

The packet loss burstiness over wireless channels is commonly acknowledged as a key impacting factor on the performance of networking protocols. An accurate evaluation of the packet loss burstiness, which reveals the characteristics and performance of the wireless channels, is crucial to the design of wireless systems and the quality-of-service provisioning to end users. In this paper, a simple...

In this paper, we investigate the behavior of packet loss in Internet Protocol (IP) networks with two transport protocols: User Datagram Protocol (UDP) and Transmission Control Protocol (TCP). We simulate packet loss in congested networks, and we use wavelet analysis to characterize packet loss collected from the trace driven simulation studies. We also analyze the impact of time-scales on the ...

Packet loss patterns over unidirectional satellite link provide useful information for improving the performance of applications like bulk data transfer to many recipients. In this paper, we present our observations and analysis of packet loss patterns on one-to-many multicast sessions taken over an extended period of time. We collected the packet loss data on four multicast receivers in four d...

A Mobile Ad-hoc Network is a kind of mobile wireless network in which every node is mobile and autonomous. Since there is no infrastructure in such a network, a highly adaptive routing scheme to deal with the frequent topology changes is required. In mobile ad-hoc networks, there are some critical problems such as node mobility and the limited power of nodes, which can cause the link breakage. ...

The connection of ad-hoc networks to the Internet is typically established via gateways. To start an Internet connection, in a first step gateways have to be discovered by the mobile nodes within the ad-hoc cluster. Several gateway selection schemes have been proposed that select gateway nodes based on a single Quality of Service parameter, link capacity, link quality, path availability period,...