The ability to configure transport protocols from collections of smaller software modules allows the characteristics of the protocol to be customized for a specific application or network technology. This paper describes an approach to building such customized protocols using Cactus, a system in which micro-protocols implementing individual attributes of transport can be combined into a composite protocol that realizes the desired overall functionality. In contrast with similar systems, Cactus supports non-hierarchical module composition and event-driven execution, both of which increase flexibility and allow finer-grain modules implementing orthogonal properties. To illustrate this approach, the design and implementation of a configurable transport protocol called CTP is presented. CTP allows customization of a number of properties including reliable transmission, congestion detection and control, jitter control, and message ordering. This suite of micro-protocols has been implemented using Cactus/C 2.0 on Red Hat Linux 6.2, with initial experimental results indicating that the ability to target the guarantees more precisely to the needs of applications can in fact result in better performance.

Network-conscious image compression has been shown to provide faster progressive display than traditional compression algorithms, when images are transmitted over lossy low-bandwidth packet-switched networks. In this paper, we combine the advantages of wavelet-based, network-conscious image compression with a blind digital image signature technique. Together these two approaches investigate progressive display where each progressive image can be authenticated by the receiver in real time. 1 INTRODUCTION Image transmission over wireless networks requires special attention mainly for two reasons. (1) Wireless networks typically provide low bandwidth and unreliable communication. Image data, on the other hand, by its nature, requires high bandwidth. Therefore, transmitting images over these low bandwidth networks takes much more time than it would over a typical Internet connection. Many image transmission applications, such as telemedicine and intelligence gathering, are time-critical ...

Standard" TCP (TCP Reno) is a reliable transport protocol that is designed to perform across a wide variety of networks conditions, though it is not optimized for any.

The ever-increasing complexity of the designed systems in the multi-billion transistors era coupled with the demand of the short time-to-market design factor raises several challenges that require a new design approaches. The Networkon-Chip is a packet-based on-chip communication solution that copes with the faced problems. The proposed approach decouples the computation from the communication. Among the other features, the Networks-on-Chip allow reuse of the communication infrastructure thus reducing the design-and-test efforts and time-to-market factor. The Network-on-Chip consists of the Intellectual Property blocks organized logically and physically into the network structure. In order to allow the connected IP blocks to communicate over the formed network, every computation block is equipped with Resource-Network Interface that serves as glue between the resource and the network and provides a standard set of the high-level communication services. This master thesis is an attempt to define the communication infrastructure