A Queue Monitoring System in OpenFlow Software Defined Networks

Real-time traffic characteristic is different and it is very sensitive to delay. To meet traffic specications in real time, monitoring systems are used as an important part of networking. Many monitoring systems are deployed to have an update view of the network QoS parameters and performance. Most of these systems are implemented to measure QoS parameters in links. Here, in this paper, a system for monitoring queues in each link by means of Software Defined Networks is proposed. The monitoring system is implemented by extending Floodlight controller, which uses OpenFlow as southbound protocol. The controller has a centralized view of the network. By the help of OpenFlow it also can provide flow level statistics. Using these advantages, the proposed system can monitor delay and available bandwidth of a queue on a link or path. Despite of monitoring systems in traditional networks, the proposed monitoring system makes a low overhead in network thanks to OpenFlow protocol messages. It is also integrated into the network controller, which enables QoS and trac engineering applications to use the system's reports for automatic traffic management and QoS setup. The experimental results show a 99% accuracy of the proposed system for monitoring of both bandwidth and delay

The Role of Imposed Facilities of Cooperation Sector in Creating Job Opportunities during the 3rd Development Plan of Iran (A Case Study of Khorasan Province)

In this study the role of imposed facilities of the cooperation sector to create job opportunities in Khorasan province during the years 2000-2004 (3rd Development Plan) is examined. The theoretical framework of the research was established using library method. The findings showed that imposed facilities have realized 58.5% of the predicted job opportunities. Cooperation projects in agriculture & service sectors are more successful than industrial sectors in regard to job creation and development, complementary and construction projects have no significant difference in regard to job creation. Also facilities needed for employment of one individual in various economic sectors of several cities are shown to have no significant difference. In addition if the government aims to attract various small and scattered investments, imposed facilities constitute an effective factor, as the increase in the amount of facilities results in increased investments by the executors of cooperative projects