55,332 research outputs found
SIMULASI WIRELESS MESH NETWORK (WMN) UNTUK MENDUKUNG IMPLEMENTASI NEXT GENERATION NETWORK (NGN)
Wireless LAN application has been widely used today. One of the wireless topology that cheap but reliable is mesh topology, otherwise known as wireless mesh network (WMN). To support the development of Next Generation Network (NGN), research about wireless mesh network is needed before it is implemented further. This paper represents the preliminary findings of research on the implementation of the WMN for rural areas, especially in areas that will connect between madrasah, majlis taâlim, pesantren, and others. This paper contains a simulation scenario to determine how the characteristics of wireless mesh networks. This is also done to determine the End-to-End delay, Packet Drop and throughput that occur in the routing process. Simulations conducted in the laboratory using four indoor access point (IAP): 1 as a server, and 3 as a workstation. Routing protocol used in the experiments is OLSR (Optimized Link State Routing). Network monitoring using SNMP and operated on a Linux OS. The simulation results showed that the total bytes for the application packet bigger than packet routing. But the number of routing packets is larger than the application package. Trace routes results showed that the inter-hop in the configuration of the simulation WMN is connected properly
Will 5G See its Blind Side? Evolving 5G for Universal Internet Access
Internet has shown itself to be a catalyst for economic growth and social
equity but its potency is thwarted by the fact that the Internet is off limits
for the vast majority of human beings. Mobile phones---the fastest growing
technology in the world that now reaches around 80\% of humanity---can enable
universal Internet access if it can resolve coverage problems that have
historically plagued previous cellular architectures (2G, 3G, and 4G). These
conventional architectures have not been able to sustain universal service
provisioning since these architectures depend on having enough users per cell
for their economic viability and thus are not well suited to rural areas (which
are by definition sparsely populated). The new generation of mobile cellular
technology (5G), currently in a formative phase and expected to be finalized
around 2020, is aimed at orders of magnitude performance enhancement. 5G offers
a clean slate to network designers and can be molded into an architecture also
amenable to universal Internet provisioning. Keeping in mind the great social
benefits of democratizing Internet and connectivity, we believe that the time
is ripe for emphasizing universal Internet provisioning as an important goal on
the 5G research agenda. In this paper, we investigate the opportunities and
challenges in utilizing 5G for global access to the Internet for all (GAIA). We
have also identified the major technical issues involved in a 5G-based GAIA
solution and have set up a future research agenda by defining open research
problems
A Survey on Communication Networks for Electric System Automation
Published in Computer Networks 50 (2006) 877â897, an Elsevier journal. The definitive version of this publication is available from Science Direct. Digital Object Identifier:10.1016/j.comnet.2006.01.005In todayâs competitive electric utility marketplace, reliable and real-time information become the key factor for reliable delivery of power to the end-users, profitability of the electric utility and customer satisfaction. The operational and commercial demands of electric utilities require a high-performance data communication network that supports both existing functionalities and future operational requirements. In this respect, since such a communication network constitutes the core of the electric system automation applications, the design of a cost-effective and reliable network architecture is crucial.
In this paper, the opportunities and challenges of a hybrid network architecture are discussed for electric system automation.
More specifically, Internet based Virtual Private Networks, power line communications, satellite communications and wireless communications (wireless sensor networks, WiMAX and wireless mesh networks) are described in detail. The motivation of this paper is to provide a better understanding of the hybrid network architecture that can provide heterogeneous electric system automation application requirements. In this regard, our aim is to present a structured framework for electric utilities who plan to utilize new communication technologies for automation and hence, to make the decision making process more effective and direct.This work was supported by NEETRAC under
Project #04-157
Impact factors for mobile internet applications in the agri-food sectors
Mobile communication and the mobile Internet can provide important opportunities,
economic advantages for enterprises end organisations and support their more efficient operating as they can
be used anytime and anywhere. We can make their wide spread use, innovative effects and advantages
economical if we consider the effect system of technologies and services. The technological, social and
economical complex effect system puts a pressure on the spreading of business applications. The types of
applicable equipment are increasing. According to social aspects there are four player groups:
manufacturers, enterprises, customers and workers. The Internet technology and the Internet network have
become essential communication tools in business processes recently. Using the Internet by means of
mobile appliances increases the possibilities. By studying the business process the expenses, advantages,
disadvantages can well be seen. Nowadays these applications are more and more successful in areas such as
agriculture, different parts of the food industry, extension services, precision agriculture and logistics. It can
be stated that the international and the Hungarian development tendencies of the mobile Internet, the RTD
Programmes of EU help the wide-spread use of mobile services. The rapid development of the Hungarian
domestic mobile market over the last years is the basis for the wide spread use of new broadband mobile
services and applications. This system can contribute to the development of agriculture, enterprises and rural
areas and can support production, commerce, services and product tracing. But for successful applications
we have to consider the impact factors
Vehicle to vehicle (V2V) wireless communications
This work focuses on the vehicle-to-vehicle (V2V) communication, its current challenges, future perspective and possible improvement.V2V communication is characterized by the dynamic environment, high mobility, nonpredective scenario, propagation effects, and also communicating antenna's positions. This peculiarity of V2V wireless communication makes channel modelling and the vehicular propagation quite challenging. In this work, firstly we studied the present context of V2V communication also known as Vehicular Ad-hoc Netwok (VANET) including ongoing researches and studies particularly related to Dedicated Short Range Communication (DSRC), specifically designed for automotive uses with corresponding set of protocols and standards. Secondly, we focused on communication models and improvement of these models to make them more suitable, reliable and efficient for the V2V environment. As specifies the standard, OFDM is used in V2V communication, Adaptable OFDM transceiver was designed. Some parameters as performance analytics are used to compare the improvement with the actual situation. For the enhancement of physical layer of V2V communication, this work is focused in the study of MIMO channel instead of SISO. In the designed transceiver both SISO and MIMO were implemented and studied successfully
Sub 1GHz M2M communications standardization: The advancement in white space utilization for enhancing the energy efficiency
Energy efficiency of machine to machine (M2M) communications terminals is one of the major design goals of M2M networks, resulting from anticipated over 50 billion M2M communications devices to be deployed into the networks by 2020 [1]. The stakeholders in the M2M communications have observed that it will be environmental and economic catastrophic to deploy M2M communications devices without solving the energy inefficiencies associated with wireless devices that are expected to be used for M2M communications. In view of the aforementioned energy challenge, sub 1GHz spectra have provided enormous opportunities that can be energy efficient, cost effective and coverage efficiency which can be utilized for M2M communications. This work will evaluate the energy efficiency benefits of optimized Sub 1GHz spectra for M2M communications
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