When several radio access technologies (e.g., HSPA, LTE, WiFi, and WiMAX) cover the same region, deciding to which one mobiles connect is known as the Radio Access Technology (RAT) selection problem. To reduce network signaling and processing load, decisions are generally delegated to mobile users. Mobile users aim to selfishly maximize their utility. However, as…
Tags: mixim omnet
Dissortative from the Outside, Assortative from the Inside: Social Structure and Behavior in the Industrial Trade Network
It is generally accepted that neighboring nodes in financial networks are negatively assorted with respect to the correlation between their degrees. This feature would play an important “damping” role in the market during downturns (periods of distress) since this connectivity pattern between firms lowers the chances of auto-amplifying (the propagation of) distress. In this paper…
Reliability and Survivability Analysis of Artificial Cobweb Network Model Used in Low-voltage Power-line Communication System
In order to verify the feasibility of the artificial cobweb model used in low-voltage power line communication (LVPLC) routing to improve the reliability of LVPLC, the all- terminal reliability of the artificial cobweb model has been calculated based on the factorization method in this paper. Specifically,Analysis shows that the proposed artificial cobweb shows much better…
Ultimate boundedness of non-autonomous dynamical complex networks under impulsive control
This paper is concerned with the ultimate boundedness problem of non-autonomous complex networks with different dynamical nodes by using the impulsive control method. Some ultimate boundedness and asymptotical stability criteria for the non-autonomous complex networks with different dynamical nodes under impulsive control are obtained by using Lyapunov functions. The results show that not only unstable…
Error control scheme using decomposable codes for various QoS in multiple WBAN environment
Recently, studies on medical and health monitoring systems using wireless communications have been actively conducted. In the field of health monitoring systems, Wireless Body Area Network (WBAN) is one of the key technologies and its standardization activities have also been extensively carried out. As our previous work, we proposed an optimal QoS control scheme employing…
Vehicle Mobility and Communication Channel Models for Realistic and Efficient Highway VANET Simulation
Developing real-time safety and nonsafety applications for vehicular ad hoc networks (VANETs) requires understanding of the dynamics of the network topology characteristics since these dynamics determine both the performance of routing protocols and the feasibility of an application over VANETs. Using various key metrics of interest, including node degree, neighbor distribution, number of clusters, and…
Retaining control over SDN network services
Both academic researchers and network vendors have started to promote Software-Defined Networking (SDN) as a new network paradigm, in which controller systems play a major role. A modular and extensible design allows network operators to extend the controller’s functionality by so called network services. Unfortunately, in current designs such network services have unlimited access to…
Dynamic OpenFlow-Based Lightpath Restoration in Elastic Optical Networks on the GENI Testbed
Elastic optical networking (EON), with its flexible use of the optical spectrum, is a promising solution for future metro/core optical networking. For the deployment of EON in a real-operational scenario, the dynamic lightpath restoration, driven by an intelligent control plane, is a necessary network function. Dynamic restoration can restore network services automatically and, thus, greatly…
Copper is the new black for ultra broadband networks
G.fast, the newest ITU protocol for copper access, will deliver anywhere from hundreds of Mb/s to close to 1Gb/s. Operators have an additional tool at their disposal to provide fiber like speeds over existing copper.
Second-Order Global Consensus in Multiagent Networks With Random Directional Link Failure
In this paper, we consider the second-order globally nonlinear consensus in a multiagent network with general directed topology and random interconnection failure by characterizing the behavior of stochastic dynamical system with the corresponding time-averaged system. A criterion for the second-order consensus is derived by constructing a Lyapunov function for the time-averaged network. By associating the…