Tag Archive: 'opnet wimax'

Modelling delay propagation within a train communication network

Industrial Ethernet has been widely used in Modern HighSpeed Train Communication Networks (HSTCN). The reliability of HSTCN influences train safety. And time-oriented reliability is an important part of the HSTCN reliability. In the situation of node dependency, it is a difficult problem to analyze delay propagation for HSTCN. In order to solve the problem, we […]

User-specific QoS aware scheduling and implementation in wireless systems

In this paper, we explore user-specific QoS requirements and associated schedulers that are very critical in optimizing the spectral allocation for wireless systems. Two user-specific QoS aware schedulers are proposed that considers the user-specific QoS requirements in the allocation of resources. Depending upon whether improving the MOS (Mean Opinion Score) or both the system capacity […]

Transport Network Orchestration for End-to-End Multilayer Provisioning Across Heterogeneous SDN/OpenFlow and GMPLS/PCE Control Domains

A multidomain optical transport network composed of heterogeneous optical transport technologies (e.g., flexi/fixed-grid optical circuit switching and optical packet switching) and control plane technologies (e.g., centralized OpenFlow or distributed GMPLS) does not naturally interoperate, and a network orchestration mechanism is required. A network orchestrator allows the composition of end-to-end network service provisioning across multidomain optical […]

A Data Visualization Approach for Trustworthiness in Social Networks for On-line Learning

Up to now, the problem of ensuring collaborative activities in e-Learning against dishonest students’ behaviour has been mainly tackled with technological security solutions. Over the last years, technological security solutions have evolved from isolated security approaches based on specific properties, such as privacy, to holistic models based on technological security comprehensive solutions, such as public […]

Special issue on mobile social networks

Social networks contribute a significant fraction of Internet traffic, and increasingly this traffic is in support of mobile social networking using smart phones. This situation has spurred considerable recentresearch interest in mobile social networks. Social networks have been studied for decades, although most of the earlier work in this area addressed issues lying outside the scope of technological networks. […]

Software defined network traffic measurement: Current trends and challenges

Next generation networks such as Software Defined Networks (SDN) must support the integration of new paradigms of service offerings such as virtual cloud computing, big data applications, data centers services, and rich multimedia content. Operators of next generation SDNs are responsible for configuring policies that employ traffic monitoring tools and measurement mechanisms to detect and […]

Independent transient plane design for protection in OpenFlow-based networks

Network protection against link failure is required to allow packets to reach the destination with minimal packet loss when a failure occurs. When a link fails, traffic that attempts to use the failed link is interrupted. Typically, routers in the network discover the failure and find a new route to bypass the failed link. Alternatively, well-known segment […]

Distributed Service Level Flow Control and Fairness in Wireless Mesh Networks

IEEE 802.11s mesh networking standard supports Mesh Coordinated Channel Access (MCCA) to provide better quality of service (QoS) through channel reservation during the MAC layer channel access. According to the current QoS specifications, network traffic can be broadly classified into four classes – voice, video, background and best effort. However, MCCA does not directly support the standard […]

Fine-Grained Energy-Efficient Consolidation in SDN Networks and Devices

The constant evolution and expansion of the Internet and Internet-related technologies has exposed the limitations of the current networking infrastructures, which are represented by the unsustainable power consumption and low level of scalability. In fact, these infrastructures are still based on the typical, ossified architecture of the TCP/IP paradigm. In order to cope with the Future Internet […]

An open source research platform for embedded visible light networking

Despite the growing interest in visible light communication, a reference networking platform based on commercial off-the-shelf components is not available yet. An open source platform would lower the barriers to entry of VLC network research and help the VLC community gain momentum. We introduce OpenVLC, an open source VLC research platform based on software-defined implementation. […]