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Smart electronic gadgets are used to increase the data usage in recent mobile communications. But, the spectrum efficiency cannot be increased in terms of data rates in 4G LTE. To improve this high data rates, it is essential to improve the bandwidths (≤ 100 MHz) using multiple carrier or channel since it is not possible by single channel or carrier. For improving data rates high, here it is utilized...
Simulation is the crux of every network research as it imitates the real word scenarios. Several network simulators are utilized to analyze the performance of the network. Among them NS3 is currently trending network simulator and it is an open source library package developed using C++ and Python languages. Various new modules are being incorporated in NS3 as part of the development. The modules...
Cognitive radio is the one of the technique which used to solve the problems of spectrum inefficiency and limited spectrum availability in wireless networks. However, while designing the availability and efficiency of spectrum in wireless network the security in cognitive radio is one of the key challenge. The selfish attack is one of major security issue found in cognitiveradio. The selfish attack...
In this paper, we propose a modified cooperative sensing scheme as documented by IEEE 802.22 standard to develop a spectrum agile simpler implementable cognitive radio network (CRN) by minimizing the probability of false alarm and maximizing the probability of detection to optimize the maximum achievable system throughput through the optimal decision fusion rule. In addition, we develop a dynamic...
In this paper, a novel context aware medium access control (MAC) scheme is proposed for multichannel buffer-aided cognitive networks. The proposed scheme allows management of the delay of the primary network (PN) and secondary network (SN) more efficiently by exploiting the packets' context. In the proposed multiple access policy, two different context aware approaches for packet prioritization are...
Device-to-device (D2D) communications have recently been considered as promising means to enhance resource utilization of cellular network. In this paper, we investigate joint channel assignment and power allocation to maximize utility of cellular users as well as throughput of every D2D pair, while guaranteeing minimal transmission rate of cellular users from a Nash bargaining theory point of view,...
This paper investigates the problem of co-tiered interference mitigation for small cell networks, in which most small cell base stations (SBSs) are deployed in an ad-hoc manner with minimum intervention from the end users and the service providers. Some game approaches are proposed to solve such problem distributedly. However, in most existing studies (include game approaches), a central controller...
The investigation of the LTE traffic channel blocking probability is presented in this paper. It is very important problem related to the effective utilization of physical resources in multiservice LTE networks. There will be shown the key motivation of moving to the direction of introducing the dynamic signaling and traffic channel resource relocation based on user demand.
To this day, Cloud computing continues its explosive growth. Nevertheless, with the exceptional evolution of demands, data centers are suffering from congestion problems. To deal with these resource limitations, first, we put forward a novel Hybrid Data Center Network (HDCN) Architecture enabling high throughput wireless (IEEE 802.11 ad) and wired (IEEE 802.3) transmissions. Secondly, we propose a...
The current implementation and operation of traffic control schemes by Internet service providers (ISPs) prevent subscribers from getting the benefits of full sharing of resources available in shared access networks, where the capability of allocating available bandwidth by a scheduler (e.g., weighted fair queueing (WFQ)) in an access switch is limited to traffic already shaped by token bucket filters...
A major problem in Wireless Mesh Network is capacity decrease due to wireless interference. A wireless mesh router with multiple routers and channels is capable of reducing network interference. Static channel allocation and dynamic channel allocation are types of channel allocation. Adaptive Dynamic Channel Allocation protocol (ADCA) is dynamic channel allocation protocol which decreases the packet...
Growing number of vehicles on the road unavoidably leads to increasing amount of accidents. As a result, Vehicular Ad-hoc Network (VANET) has been proposed with the aim of preventing accidents and increasing road safety. Based on the currently proposed Dedicated Short-Range Communication (DSRC) technology for Wireless Access in Vehicular Environment (WAVE) standard, in the scenario with high vehicle...
The advancements in wireless mesh networks (WMN), and the surge in multi-radio multi-channel (MRMC) WMN deployments have spawned a multitude of network performance issues. These issues are intricately linked to the adverse impact of endemic interference. Thus, interference mitigation is a primary design objective in WMNs. Interference alleviation is often effected through efficient channel allocation...
Interference avoidance between macro and femto cells is necessary in heterogeneous network (HetNet) systems. To solve the issues, we proposed a method that controls not only transmit power but also channel assignment by genetic algorithm. In this paper, we optimize parameters in indoor environment under the constraint from interference from macro networks and evaluate the throughput performance in...
Internet traffic has been growing year-after-year for decades, but processing all that traffic through traditional IP routers has become an obstacle to further expansion. Router bypass has been introduced recently to overcome capacity limitations and processing costs of IP routers. With router bypass, a portion of traffic is provisioned to bypass the traditional router and is instead switched by the...
This paper presents an efficient resource allocation approach for outband device-to-device communication within cellular networks. The proposed method aims to maximize bandwidth resource utilization and simplify system protocols, greatly optimizing throughput by minimizing the number of blocked connections and increasing the ease of operation. Using this method, bandwidth resources can be effectively...
Rapid increases in mobile data demand and inherently limited RF spectrum motivate the use of dynamic spectrum sharing between different radio technologies such as WiFi and LTE, most notably in small cell (HetNet) scenarios. This paper provides a analytical framework for interference characterization of WiFi and LTE for dense deployment scenarios with spatially overlapping coverage. The first model...
Software-Defined Networking promises to deliver more flexible and manageable networks by providing a clear decoupling between control plane and data plane and by implementing the latter in a logically centralized controller. However, if such principles are to be applied also to wireless networks, new primitives and abstractions capable of providing programmers with a global view of the network capturing...
Communication links in multi-radio multichannel (MRMC) wireless mesh networks (WMNs) can be beamformed by using the multiple omni-directional antennas of a multi-radio mesh node in the form of a linear antenna array. We recently developed the first channel assignment (CA) method for linear array beamformed (LAB) links in MRMC WMNs. In this paper we use this new LAB-CA to conduct the first in-depth...
Wireless Mesh Networks (WMNs) is an emerging and latest technology that is used to develop the new attractive applications for wireless network users. WMNs provide a good platform for many researchers to develop new innovative procedures and methods to improve the network performance in wireless enterprise backbone networks. WMNs have unique features like ease of deployment at low cost. By adding...
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