Basically, there are two types of wireless network systems - base-station (BS) oriented networks and ad hoc networks. In the first type, mobile hosts communicate with base stations, while, in networks, one another directly. The BS-oriented has better performance is more reliable. However, topology desirable because its low cost, plug-and-play convenience, flexibility. Its usage bandwidth battery power efficient, but route communication connectivity fairly weak; any migration by a host...

We explored mined block temporarily holding (MBTH) with enforce fork (MBTH-EF) attacks to understand the effect of selfish mining on winning rate and fairness. The temporary time provides a pool additional begin next early. In this situation, may risk losing block. One method maintain probability held is ensure sends out hash values once it receives message from other pools. analyzed MBTH-EF evaluated effects win when how long held. propose competition solution that does not involve actual...

In 802.11-based wireless local area networks (WLANs), it is difficult to simultaneously attain both high throughput and fairness for multirate traffic. There a performance anomaly when there are stations whose data rates much lower than the other stations, in which aggregate of high-rate drastically degrades. The problem maximizing total while maintaining time among competing was studied previously by same authors. However, our previous solution sacrificed low-rate stations. this paper, we...

Cognitive radio network (CRN) is designed to improve the low resource utilization problem caused by fixed spectrum allocation policy used today. In CRNs, secondary users (SUs) sense holes and adaptively use frequency band. this paper, we tackle Quality of Service (QoS) routing in wireless ad hoc CRNs. We consider such factors as available time, bands, transmission range, error rate, primary user (PU) interruption rate design a new QoS metric for then evaluate performance via simulations...

The load balancing problem is one of an open issues for the cloud computing. A good mechanism enhances performance network processing, optimizes use resources, and ensures that no overloading a single node or link case. existing computing research mainly unilateral fairness transmission stand only system. Hence, this work considers handling both system to obtain high performance. To assign tasks same type nodes along links with minimum processing delays subject capacities links. Three task...

In wireless sensor networks (WSNs) with multiple sink nodes, energy is wasted on idle listening, redundant transmissions, and unnecessary power consumption. The total consumption may be minimized by properly scheduling communications in conjunction aggregating data dynamically adjusting radii. We propose near-optimal aggregation routing duty cycle heuristics, denoted MDAR O-MAC, which achieve efficiency bound latency within a reasonable range. These heuristics outperform other general (e.g.,...

In heterogeneous wireless networks, coordinated multipoint technology facilitates coordination and mutual cooperation among various types of networks applications. The resource requirements applications differ considerably under the constraint limited resources so that allowable delay is considered. This study considered a centralized management scheme involving fourth-generation (4G) mobile Evolved Node B, access points, back-end servers. operator controls flow performs routing selection...

In wireless sensor networks, continued operation of battery-powered devices plays a crucial role particularly in remote deployment. The lifetime is primarily dependent upon battery capacity and energy efficiency. this paper, reduction the consumption heterogeneous with different power range characteristics introduced context duty scheduling, dynamic adjustment transmission ranges, effects IEEE 802.15.4-based data aggregation routing. Energy cluster-based networks modeled as mixed-integer...

Cloud storage (CS) is a type of data system widely accepted in information technology communities. Users CS require reliable and continuous access to on their stored storage. Therefore, this study presents backup method for retrieval from distinct places based the frequencies shared folder. The proposed improves quality services by studying duplication system. This approach aims minimize time, which subject required transmission bandwidth location develops network model, frequency delay...

Purpose The purpose of this study is to review the levels open government data (OGD) among various countries that are not consistent with development those countries. This evaluates associativity between OGD Index and characteristics as well compare degree Accordingly, an advanced discussion explore how a country’s affect opens was presented. Design/methodology/approach stakeholder relationships analysed country. usage compared availability according nine indicators. These collected from...

The network lifetime for wireless sensor plays an important role to survivability. Thus, we indicate the importance of routing protocol lifetime, and model expected retransmission time as a convex function with respect aggregate flow on each node. Thus formulate optimal energy-efficient non-linear min-max programming problem product form, which can be optimally solved by framework. Based framework, propose Lagrangean-based algorithm primal algorithm. By combination these two algorithms,...

In an emerging paradigm in 5G networks, the computations of various types mobile applications are offloaded to cloud environments. Edge and core clouds provide computing, storage, networking resources serve as a generic computing platform. Network slicing techniques offer effective way boost services, such delay-sensitive or computationally intensive application, that deployed on-demand shared resource infrastructure. This study proposes management mechanism optimize quality experience (QoE)...

Transactions and blocks must be synchronized among the blockchain miners on Internet. Software-defined networking network function virtualization techniques support dynamically assigning computing resources into servers of core edge clouds. In this paper, an adaptive broadcast algorithm is proposed for authentication, authorization, accounting (AAA) services. The cryptography propagated throughout Internet by using a mechanism. message may incur propagation delay duplicate transmissions....

Purpose – The purpose of this paper is to establish a social-network sp.orts lottery system support users in predicting and simulating sports betting. community data were generated user decision featured instant game records odds synchronisation. Furthermore, the next development cycle evaluated through questionnaire. Design/methodology/approach An extended prototype website methodology was applied develop system. online sample collected evaluate function, interface, operation, prediction...

A mobile device with embedded cognitive radios (CRs) is integrated into a novel low-cost massive antenna configuration multihop or device-to-device (D2D) wireless network that temporarily uses any portion of the spectrum for transmissions. However, number spectral bands (SBs) CR can sense within specific time limited. Furthermore, node transmissions interfere one another. This paper proposes method both cooperative sensing and transmission preallocated disjoining sections (SSs) from...

The lifetime of a network, dependent upon battery capacity and energy consumption efficiency, plays an important role in wireless sensor networks. In this paper, the reduction is investigated by considerations effects cluster-based data aggregation routing conjunction with well-scheduled dynamic power range. Modeling as mixed integer- nonlinear-programming problem, objective function provides basis which total minimized. problem cluster construction trees were proven NP- complete. Thus, we...

Purpose The purpose of this paper is to review research on options theory (OT) in the management information systems (MIS) field. Design/methodology/approach reviews OT and suggests further ways it may be useful for MIS. Findings explores current global trends past uses by MIS researchers within a framework. objective broaden discussion field, facilitate development, close gaps existing knowledge, uncover areas where needed. It believed that will benefit from study. Research...

In this paper, we develop a heuristic algorithm to construct an efficient object tracking in wireless sensor networks (WSNs).Such network has be designed achieve for given arbitrary topology of networks.We consider the two-way moving frequency each pair nodes and link transmission cost.This problem is formulated as 0/1 integerprogramming problem.A Lagrangean Relaxationbased (LR-based) proposed solving optimization problem.The experimental results showed that gets near tracking.Furthermore,...

Due to varying wireless channel conditions, the IEEE 802.11 local area network (WLAN) standard supports multiple modulation types accommodate tradeoff between data rate and bit error rate. In Heusse(2003), Rousseau, Berger-Sabbatel Duda theoretically analyzed a performance anomaly when multi-rate stations with different exist in WLANs. The is: aggregate throughput of those transmitting at higher will dramatically degrade below same level as that lower this paper, we address problem formulate...

The nature of wireless sensor networks make them suitable for a great variety applications, especially over wide areas, or in remote hostile locations; however, such environments battery capacity an important concern, where replacing recharging batteries is in- feasible one reason another. Battery restrictions on highly energy-constrained can be mitigated, by adopting data-aggregation techniques and managing the scheduling nodes. These effectively reduce overall amount data transmitted,...