WLAN Integrated with GPRS Network Securely

In this paper a WLAN network that accesses the Internet through a GPRS network was implemented and tested. The proposed network is managed by the Linux based server. Because of the limited facilities of GPRS such as dynamic IP addressing besides to its limited bandwidth a number of techniques are implemented to overcome these limitations.Dynamic Host Configuration Protocol (DHCP) server was added to provide a single central control for all TCP/IP resources. Squid Proxy was added to provide caching of the redundant accessed Web content to reduce the Internet bandwidth usage and speeding up the clients download time. Network Address Translation (NAT) service was configured to share one IP address among several different systems. In order to accomplish a secure channel to exchange data between two network devices, the Secure Shell (SSH) protocol was added. The first test shows that the data transfer rate at different time intervals of the day found to be an average of 10.95 Kbps for uploading and 13.7 Kbps for downloading and the second test shows that the network performance improved when squid proxy cache was used. The data rate found to be 143.3 Kbps average for uploading rate and 376.6 Kbps average for downloading rate

Data Quality Challenges in Net-Work Automation Systems Case Study of a Multinational Financial Services Corporation

With the emerging trends of IPv6 rollout, Bring Your Own Device, virtualization, cloud computing and the Internet of Things, corporations are continuously facing challenges regarding data collection and analysis processes for multiple purposes. These challenges can also be applied to network monitoring practices: available data is used not only to assess network capacity and latency, but to identify possible security breaches and bottlenecks in network performance. This study will focus on assessing the collected network data from a multinational financial services corporation on its quality and attempts to link the concept of network data quality with process automation of network management and monitoring. Information Technology (IT) can be perceived as the lifeblood within the financial services industry, yet within the discussed case study the corporation strives to cut down operational expenditures on IT by 2,5 to 5 percent. This study combines both theoretical and practical approaches by conducting a literature review followed by a case study of abovementioned financial organization. The literature review focuses on (a) the importance of data quality, (b) IP Address Management (IPAM), and (c) network monitoring practices. The case study discusses the implementation of a network automation solution powered by Infoblox hardware and software, which should be capable of scanning all devices in the network along with DHCP lease history while having the convenience of easy IP address management mapping. Their own defined monitoring maturity levels are also taken into consideration. Twelve data quality issues have been identified using the network data management platform during the timeline of the research which potentially hinder the network management lifecycle of monitoring, configuration, and deployment. While network management systems are not designed to identify, document, and repair data quality issues, representing the network’s performance in terms of capability, latency and behavior is dependent on data quality on the dimensions of completeness, timeliness and accuracy. The conclusion of the research is that the newly implemented network automation system has potential to achieve better decision-making for relevant stakeholders, and to eliminate business silos by centralizing network data to one platform, supporting business strategy on an operational, tactical, and strategic level; however, data quality is one of the biggest hurdles to overcome to achieve process automation and ultimately to achieve a passive network appliance monitoring system.siirretty Doriast

Design and implementation of an UDP/IP Ethernet hardware protocol stack for FPGA based Systems

The main objective of the thesis has been the design and implementation of a complete UDP/IP Ethernet stack that allow us the connection and use of networks by any FPGA device. The stack has been designed around Ethernet, IPv4 and UDP protocols as it was wanted a fast and scalable way of distant communication. Other protocols have been added as a complement in order to improve its operation like ARP and DHCP. The project has focused around the implementation of this stack as a generic IP core, but it has been extended further on with the implementation of an initial data acquisition interface (DAQ) that would allow us to transmit the information of its channels to the network. At the end, the project has been successfully implemented in a real FPGA system. And all the tests have been passed with minimum packet loss, from simple operational test to more final ones like the test of a DAQ service interface

Contextually and identity aware 5G services

This thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel University LondonThe fifth generation (5G) mobile networks aim to be ten times faster than the existing 4G connection, whilst providing low latency, and flexibility. Hence, various alterations are planned to the existing network infrastructure to be able to reach the 5G expected performance levels. The main technologies that were used, to ensure high performance, flexible network, and efficient resource allocation, are Software Defined Network and Network Function Virtualization. As these technologies are replacing the device-based architecture with, a service-based architecture. This thesis provides a design of location database interactive web interface and interactive mobile application. The implementation of real time video streaming location server, the streaming system's performance parameters demonstrated a high level of QoS (0.07ms jitter and 9.53ms delay). In regard to experimental examination, it measured the localisation coverage, accuracy measurements and a highly scalable security solution. The localisation coverage and accuracy measurements were achieved through the mmWave and VLC link transmitters. The proposed simulated annealing algorithm aimed at data optimisation for location measurements accuracy showed results of the average location error of x and y which showed significant improvement from x= 22.5 and y=21.6 to x=11.09 and y= 11.63. The proposed indoor location security solution showed significant results, as it provides a high scalability solution using the VNF. The solution showed that it was not 100% effective, as some of the fake discover packets still reached the DHCP server. This was due to the high load of traffic passing through the network. Nonetheless, 90% of the fake DHCP discover packets never reached the DHCP server because the scripts began blocking all fake discover packets after realising it was an attack. This conveys that the proposed system was able to run successfully without crashing or overloading the controller. Overall, the main challenges facing 5G have been addressed with their proposed solutions, which showed promising results. Conclusively showing that there is a lot more space for technological advancements to support the future of mobile networks.European Union’s Horizon 2020 research program - the Internet of Radio-Light (IoRL) project H2020-ICT 761992

Cooperation Between Stations in Wireless Networks

In a wireless network, mobile nodes (MNs) repeatedly perform tasks such as layer 2 (L2) handoff, layer 3 (L3) handoff and authentication. These tasks are critical, particularly for real-time applications such as VoIP. We propose a novel approach, namely Cooperative Roaming (CR), in which MNs can collaborate with each other and share useful information about the network in which they move. We show how we can achieve seamless L2 and L3 handoffs regardless of the authentication mechanism used and without any changes to either the infrastructure or the protocol. In particular, we provide a working implementation of CR and show how, with CR, MNs can achieve a total L2+L3 handoff time of less than 16 ms in an open network and of about 21 ms in an IEEE 802.11i network. We consider behaviors typical of IEEE 802.11 networks, although many of the concepts and problems addressed here apply to any kind of mobile network

Multi-technology router for mobile networks : layer 2 overlay network over private and public wireless links

Tese de mestrado integrado. Engenharia Informática e Computação. Faculdade de Engenharia. Universidade do Porto. 201