As I continued to write my Ph.D. thesis I found it very hard to organize and find literature that was on my hard drive I needed at that moment. The problem has always existed but now it has escalated because I currently have more than 150 different papers that needed to be organized, categorized and searchable. After digging around […]
The paper describes the traffic flow problems in telecommunication networks based on the Internet protocol. The main aim of telecommunication network operator today is to offer an SLA (Service Level Agreement) contract to end users, with provided QoS for different classes of services. In order to achieve this, it is necessary to establish the routes between marginal network nodes meeting the network traffic requirements and optimizing the network performances free of simultaneous flows conflicts. In DiffServ/MPLS networks traffic flows traverse the network simultaneously and there may come to collision of concurrent flows. They are distributed among LSPs (Labeled Switching Paths) related to service classes. In LSP creation the IGP (Interior Gateway Protocol) uses simple on-line routing algorithms based on the shortest path methodology. In highly loaded networks this becomes an insufficient technique. In this suggested approach LSP need not necessarily be the shortest path solution. It can be pre-computed much earlier, possibly during the SLA negotiation process. In that sense an effective algorithm for collision control is developed. It may find a longer but lightly loaded path, taking care of the collision possibility. It could be a very good solution for collision avoidance and for better load-balancing purpose where links are running close to capacity. The algorithm can be significantly improved through heuristic approach. Heuristic options are compared in test-examples and their application for collision control is explained.
Since the Faculty of Transport and Traffic Sciences was connected to CARNet academic network, new information and communication technologies are constantly being introduced and the old ones updated with the aim of improving the quality of studying, from the introduction of WEBCT application to complete design, development and implementation of one’s own solution of e-learning. A complete e-Learning system has been developed, named e-Student which consists of several program modules called SAN, DMS, SMSCentar, etc. Since the introduction of the system, the students and the teaching staff have shown great interest for the system for the reasons of easier monitoring of the students’ activities, through seminar papers and tasks, exercises and throug h solving of various knowledge tests. The work provides graphical illustrations and statistical data which analyze the operation of the system and the exploitation characteristics. The obtained results indicate the increase in the interest of the teaching staff and students which indicates further need to upgrade the system in order to increase the safety and speed of information transfer.