An investigation into dynamic TLPs for smartphone communication: To facilitate timed response in way finding for vision impaired people

A reliable, high speed and efficient data transfer method is a very important factor in real time Way-finding systems since it requires information with very low latency to discover paths, avoid dangerous situations, identified changes in existing maps and alternative routes. This research will develop models and methods to facilitate bounded timing with minimal latency for way-finding application for vision impaired people. As a result of analyzing the requirements for Way-finding applications, it was noted that some typical behaviours involve relatively small amount of data transfer through networks. Existing Transport Layer Protocols (TLP) are not ideal for providing such requirements. This research investigates existing TLPs and proposes modifications / extensions to facilitate demands in Way-finding applications and will implement the Dynamic TLP to incorporate both reliable data transfers with high efficiency as well as frequent data transfers which do not require reliability

Transport Protocol for Future Aeronautics

Space scienc

De-ossifying the Internet Transport Layer : A Survey and Future Perspectives

ACKNOWLEDGMENT The authors would like to thank the anonymous reviewers for their useful suggestions and comments.Peer reviewedPublisher PD

Using lambda networks to enhance performance of interactive large simulations

The ability to use a visualisation tool to steer large simulations provides innovative and novel usage scenarios, e.g. the ability to use new algorithms for the computation of free energy profiles along a nanopore [1]. However, we find that the performance of interactive simulations is sensitive to the quality of service of the network with variable latency and packet loss in particular having a detrimental effect The use of dedicated networks (provisioned in this case as a circuit-switched point-to-point optical lightpath or lambda) can lead to significant (50% or more) performance enhancement, When funning on say 128 or 256 processors of a high-end supercomputer this saving has a significant value. We perform experiments to understand the impact of network characteristics on the performance of a large parallel classical molecular dynamics simulation when coupled interactively to a remote visualisation tool. This paper discusses the experiments performed and presents the results from the systematic studies. © 2006 IEEE.Published versio

Simulation of Structured Streams Transport Protocol using Network Simulator 2

There has been a lot of efforts from researchers lately to deploy alternativetransports protocols and mechanisms on providing better packet ordering anddelivery semantics. The current development of Internet and Streamingtechnologies suggests that there is a clear need for such alternatives to TCPTransport Protocols. Structured Streams Transport protocol(SSTP) is a newtransport abstraction introduced lately on ACM and it is based on a differentapproach compared to other alternative transports. Main objective of SSTP is toenhance the TCP's byte stream abstraction to permit high level applications to usecontinuous byte streams in larger numbers easily and more efficiently. SST is stillin an early experimental stage and the aim of this study is to develop a new modulefor this Protocol so it can be simulated and tested on the mostly used scientificnetwork simulator in NS2. By implementing the module in NS2, we can simulatemany aspects of this protocol and fine-tune it before we implement it on high levelapplications

Robotic Wireless Sensor Networks

In this chapter, we present a literature survey of an emerging, cutting-edge, and multi-disciplinary field of research at the intersection of Robotics and Wireless Sensor Networks (WSN) which we refer to as Robotic Wireless Sensor Networks (RWSN). We define a RWSN as an autonomous networked multi-robot system that aims to achieve certain sensing goals while meeting and maintaining certain communication performance requirements, through cooperative control, learning and adaptation. While both of the component areas, i.e., Robotics and WSN, are very well-known and well-explored, there exist a whole set of new opportunities and research directions at the intersection of these two fields which are relatively or even completely unexplored. One such example would be the use of a set of robotic routers to set up a temporary communication path between a sender and a receiver that uses the controlled mobility to the advantage of packet routing. We find that there exist only a limited number of articles to be directly categorized as RWSN related works whereas there exist a range of articles in the robotics and the WSN literature that are also relevant to this new field of research. To connect the dots, we first identify the core problems and research trends related to RWSN such as connectivity, localization, routing, and robust flow of information. Next, we classify the existing research on RWSN as well as the relevant state-of-the-arts from robotics and WSN community according to the problems and trends identified in the first step. Lastly, we analyze what is missing in the existing literature, and identify topics that require more research attention in the future

Measuring Round Trip Time and File Download Time of FTP Servers

Today, Internet is a public, cooperative, and self-sustaining facility accessible to hundreds of millions of people worldwide. It has made the world a global village. It uses a layered model such as TCP/IP. Data can transfer easily using ordinary file transfer method such as HTTP and emails protocols. When to transfer or download the large set of data like big collection of file via inexpensive IP networks then throughput collapses. New TCP stacks and new network acceleration devices are market to help .but fail to fully utilize many wide area network paths. Consequently, conventional FTP, and even new "acceleration" solutions, cannot provide the speed and predictability needed for global file transfers. There are some problems which may affect the download time.  It  may  include  the hardware/software  configurations,  location  of machines,  bandwidth,  delay, congestion, size  of  the files and other type of configurations problems. The response time of the FTP server and Round Trip Time (RTT) plays an important role in download time of a file. In this paper, we investigate the possible relationship between the Round Trip Time and the software download time for the FTP servers. It also shows the factors that could have an impact on the FTP server response time. In our experiment, we assume the existing infrastructure of the Internet with its current technologies and protocols. So we concluded that if the RTT is less, the download time will be less. We presented the Karn’s algorithm to improve the accuracy of RTT measurement. Keywords: File transport protocol, Round trip time, Karn’s algorithm, DNS response time, TCP/I