Wireless Internet Applications Research Articles

Navigation-driven handoff minimization in wireless networks

Interactive wireless Internet applications (e.g. VoIP over wireless networks, realtime monitoring and some mobile-cloud offloading applications) desire high-quality links and smooth connectivity during movement. In order to support seamless roaming in wireless networks, handoff optimization constantly attracted a lot of attentions. Most existing approaches aim at reducing handoff latency by modifying the communication and association protocols. While these methods provide significant savings in handoff latency, frequent handoffs could still be crucial and problematic for interactive applications. In this paper, we propose a new method for handoff optimization by introducing navigation to minimize the handoff frequency. We first formulate the navigation-driven handoff minimization problem in general case, then propose an optimal algorithm to the scenario of global knowledge, a heuristic localized algorithm for scenario of local knowledge, and a measurement-based algorithm for scenario of real communication settings. Implementation issues of the proposed algorithms are discussed and simulations based on real world AP deployment are used to evaluate their performance. Experiment results show that our algorithms reduce handoff frequency by 23% in average, compared to existing strategies. Extensive experiments of the impact of the high-layer QoS performance are also conducted to prove the effectiveness of our work.

24‐GHz Patch antenna array on cellulose‐based materials for green wireless internet applications

A 24-GHz patch array antenna with integrated feeding network has been fabricated exploiting a multi-layer cellulose-based (i.e. paper) substrate. The adopted microstrip circuitry exploits a copper adhesive laminate that is shaped by a photo-lithographic process and transferred to the hosting substrate using a sacrificial layer. The multi-layer structure is obtained by stacking and gluing two layers of photo-paper with an interposed copper ground plane. The measurements show an input reflection coefficient of about −29 dB at the centre frequency, an operating bandwidth with S 11 ⩽ −20 dB of 540 MHz and a gain of 7.4 dBi. The estimated radiation efficiency is 35%. The proposed design shows the feasibility of low-cost antenna systems for green wireless internet technology and applications up to the boundary between microwaves and millimetre-waves.

Achieving high throughput and TCP Reno fairness in delay-based TCP over large networks

The transport control protocol (TCP) has been widely used in wired and wireless Internet applications such as FTP, email and http. Numerous congestion avoidance algorithms have been proposed to improve the performance of TCP in various scenarios, especially for high speed and wireless networks. Although different algorithms may achieve different performance improvements under different network conditions, designing a congestion algorithm that can perform well across a wide spectrum of network conditions remains a great challenge. Delay-based TCP has a potential to overcome above challenges. However, the unfairness problem of delay-based TCP with TCP Reno blocks widely the deployment of delay-based TCP over wide area networks. In this paper, we proposed a novel delay-based congestion control algorithm, named FAST-FIT, which could perform gracefully in both ultra high speed networks and wide area networks, as well as keep graceful fairness with widely deployed TCP Reno hosts. FAST-FIT uses queuing delay as a primary input for controlling TCP congestion window. Packet loss is used as a secondary signal to adaptively adjust parameters of primary control process. Theoretical analysis and experimental results show that the performance of the algorithm is significantly improved as compared to other state-of-the-art algorithms, while maintaining good fairness.

Communication and Connectivity as Veritable Tools for Information Sharing in Nigeria

This paper discusses the contributions of communication technologies to modern civilization and globalization and the role of connectivity as facilitator to efficient global information sharing today. The background study of networks, satellites, statement of the problem and the objectives of the paper were looked into. A brief historical development of Nigeria communications and their beneficial applications today were presented. Presentation was made on why internet communications in Nigeria is dominated by wireless/satellite link. It was adduced that the absence of information technology infrastructure, particularly the complete absence of fiber optics backbone and weak telecommunication base were responsible for the predominant wireless internet application in Nigeria. The paper concludes that a good information technology infrastructure base such as the construction of domestic optics backbone as ongoing by some of the GSM operators such as GlobaCom and MTN, launching of domestic communication satellite such as Nigcomsat1R in December, 2012; and the interlinking of our communication will enhance information sharing and as well reduce the cost of internet applications and motivate a larger population to participate in our new information society.

Communication and Connectivity as Veritable Tools for Information Sharing in Nigeria

This paper discusses the contributions of communication technologies to modern civilization and globalization and the role of connectivity as facilitator to efficient global information sharing today. The background study of networks, satellites, statement of the problem and the objectives of the paper were looked into. A brief historical development of Nigeria communications and their beneficial applications today were presented. Presentation was made on why internet communications in Nigeria is dominated by wireless/satellite link. It was adduced that the absence of information technology infrastructure, particularly the complete absence of fiber optics backbone and weak telecommunication base were responsible for the predominant wireless internet application in Nigeria. The paper concludes that a good information technology infrastructure base such as the construction of domestic optics backbone as ongoing by some of the GSM operators such as GlobaCom and MTN, launching of domestic communication satellite such as Nigcomsat1R in December, 2012; and the interlinking of our communication will enhance information sharing and as well reduce the cost of internet applications and motivate a larger population to participate in our new information society. DOI: 10.5901/jesr.2013.v3n9p51

A MINIATURIZED MEDICAL DEVICE FOR HEALTH MONITORING AND TELEASSISTANCE APPLICATIONS

Portable Biomedical Devices for health care management are producing a great impact in the monitoring of patients located in areas different from clinical environments such as homes, military bases, ships, and the like. The development of portable telemedicine device is accelerated by new technology like wireless transmission, GPS (Global Positioning System) receiver, Internet application and re- duction of electronic device that make it wearable. The aim of the developed device is the provisioning of extended monitoring for patients under therapy after infarction, data collection in some particular cases, remote consultation and low-cost ECG monitoring for the elderlies unable to announce their failure condition. So the system allows real-time rescue of patients having heart failure and high risk of life .

Editorial for WICON 2010 on “Recent advances in wireless internet”

Networks and Applications (MONET). This special issue is devoted to the topic of the latest research and development on wireless Internet. Wireless Internet is quickly emerging as a reality, thanks to the fast evolution of many wireless access technologies. Convergence of heterogeneous wireless networks and the next generation Internet further brings wireless Internet into a variety of application scenarios which provide mobile users with a wide range of highly demanding services, such as high speed data and real-time multimedia delivery. On the other hand, it is of critical importance to obtain a fundamental understanding of wireless Internet architectures and explore new services and solutions in order to achieve the ultimate goal of wireless Internet access anytime anywhere The aim of this special issue is to present a collection of high-quality research papers that report the latest research advances in wireless Internet communications, networks, systems, services, and applications. The whole special issue includes the extended papers in the 5th Annual International Wireless Internet Conference (WICON 2010), which was held in March 2010 (http://www. wicon.org/2010/). In this special issue, we selected 6 papers. The selected papers covered the following important topics in the field of wireless Internet: cognitive radio, wireless sensor networks, multimedia communications, and vehicular networks. A detailed overview of the selected works is given below. The first paper, Joint Spectrum Allocation and Relay Selection in Cellular Cognitive Radio Networks, presents a cross-layer framework that jointly considers spectrum allocation and relay selection with the objective of maximizing the minimum traffic demand of secondary users in a cognitive radio network cell. This cross-layer design problem is formulated as a Mixed Integer Linear Programming (MILP) and a low complexity heuristic algorithm is proposed to solve the problem. In addition, a spectrum allocation is studied among several cells with the objective of maximizing the overall minimum throughput of all cells while ensuring each individual cell’s minimum throughput requirement. The second paper, Joint Optimization of Power, Packet Forwarding and Reliability in MIMO Wireless Sensor Networks, investigates the reliable packet forwarding in Wireless Sensor Networks (WSNs) with the multiple-input multiple-output (MIMO) and orthogonal space time block codes (OSTBC) techniques. The objective is to propose a cross-layer optimized forwarding scheme to maximize the Successful Transmission Rate (STR) while satisfying the given end-to-end power consumption constraint. The channel coding, power allocation, and route planning are jointly considered to significantly improve the transmission quality in terms of STR. The joint optimization design is Y. Zhang (*) Simula Research Laboratory and University of Oslo, Oslo, Norway e-mail: yanzhang@simula.no

ICT for Telemedicine and Health Care Innovation

Portable Biomedical Devices for health care management are producing a great impact in the monitoring of patients located in areas different from clinical environments such as houses, military bases, ships, and the like. A number of applications, ranging from data collection, to chronic patient surveillance, and even to the control of therapeutic procedures, are being implemented in many parts of the world. The development of portable devices for telemedicine is accelerated by new technologies such as wireless transmission, GPS (Global Positioning System) receivers, Internet applications and GSI (Giga Scale of Integration) of electronic devices. In recent decades the development of portable biomedical devices has led to the presentation of numerous patents. The aim of this paper is to review some of these patents, with emphasis on the possibilities of patients remote monitoring, providing all necessary information in real-time from their homes to the health facility. Thus the specialist can make his diagnosis from the hospital. This is the new concept of home care.

A Disruption-Tolerant Model for Building a Mobile Application Using Web Service

Problem statement: The emerging technology in broadband telecommunication and mobile devices has increased the use of mobile applications. However, the use of mobile application is affected with low bandwidth or disrupted broadband telecommunication due to building blockage or out of coverage area. Approach: We proposed a Disruption-Tolerant Mobile Application Model (DTMA) that enables remote data access and overcomes constraint due to dysfunctional telecommunication. The interview process of Educational Service Officer at the Malaysian Educational Service Commissioner (MESC) is selected as the case study. Design of the mobile application is based on the Smart Client and wireless Internet application concepts. The main components of the model are mobile devices with its own processing power, data storage, business logic and Web service. These features enable the application to become disruption-tolerant, which can be run even when communication line is not available or disrupted. In order to prove that the proposed model is effective, a prototype based on the DTMA model is developed and evaluated. Results: The prototype is known as Mobile Interview Information System (MIIS) and it was developed using Visual Basic and .Net’s programming language in .NET Framework. Visual Studio is used as the platform. Users have performed MIIS testing and DTMA usability assessment in a real environment. The test showed that MIIS based on the DTMA model is disruption-tolerant. MIIS enables information to be accessed and updated even in a disrupted network. MIIS also enables information to be accessed and transmitted from or to the MESC’s headquarter via mobile devices. Further, MIIS enables the interview process to be implemented in a more efficient manner without any disruption. Conclusion: Mobile application developed based on the proposed DTMA model was proved to be disruption tolerant. Such application can save time, operational cost and improve the business process in terms of data integrity, mobile access and high availability.

이동전화단말기 속성이 고객만족에 미치는 영향에 관한 실증적 연구

Last rapidly changing mobile handset market in many industries, as well as market conditions affect the prevalence of various content types of consumer spending in general is affecting. Changes in mobile handset market by separating the various consumer-tier analysis, or differentiated in consumers` purchasing behavior are being reflected in the property analysis and overview of customer satisfaction can be assessed by measuring. These mobile devices and the purchase of the devices to investigate the tendency to analyze and weigh the various content industries, you can see how important one can be considered. The development of mobile communication systems and wireless internet and multimedia applications can lead the industry accelerated. In this study, tried to investigate that the mobile communication systems in consideration of the special form of mobile handsets, and customer satisfaction of mobile phone handsets, and the relationship between customer loyalty. Outcome of this study, the mobile properties and the mobile handset brand, price, design and related details to be statistically significant variables were analyzed. In this study, the characteristics of future mobile handset market with a wide range of content-based guidelines for the development of the industry is expected to be able to provide.

Medical Devices for Telemedicine and Home Care Applications

Portable biomedical devices for health care management are producing a great impact in the monitoring of patients located in areas different from clinical environments such as houses, military bases, ships, and the like. A number of applications, ranging from data collection, to chronic patient surveillance, and even to the control of therapeutic procedures, are being implemented in many parts of the world. The development of portable devices for telemedicine is accelerated by new technologies such as wireless transmission, GPS (Global Positioning System) receivers, Internet applications and GSI (Giga Scale of Integration) of electronic devices. In recent decades the development of portable biomedical devices has led to the presentation of numerous patents. The aim of this paper is to review some of these patents, with emphasis on the possibilities of patients remote monitoring, providing all necessary information in real-time from their homes to the health facility. Thus the specialist can make his diagnosis from the hospital. This is the new concept of home care. Keywords: Portable biomedical device, health care management system, ECG (ElectroCardioGram) monitoring, blood pressure, pulse oximeter, respiratory sensor, HHCE (Home Health Care Engineering)

U-LBS : 정밀 위치 데이터를 통한 차량 충돌 사고 위치 확인 시스템

The spread of wireless Internet technology development and applications with location information in the form of location-based services are more varied. In particular, where you recognize the location of objects such as people and things, and to provide valuable services based on ubiquitous, location-based services (Ubiquitous Location Based Services: u-LBS) is emerging as an important service. In this paper precise location data to the car crash through the location and offers related service system. In this paper the precise location tracking proposed by the concept of the Rail, road, to extract the location Data Matching Data and the current location is obtained. System used in GPS Packet and information about the location of the vehicle collision and the collision time, the vehicle consists of NodeID is about. Using these data, a packet is to be created when the conflict between vehicles in the vehicle will be sent to Gateway. Gateway to the packets that were sent from the Server to determine whether the conflict is that in an emergency situation, Emergency Center for location information and let me know whether or not the conflict will be measured. Also, for those on the outside of an emergency such as a family related to the wireless terminal wireless (PDA, cell phone) is to let me know. Server get into the conflict that was configured to store information on the Database. Additionally, the proposed u-LBS system to verify the validity of the experiment was performed.

차량 충돌 사고에 대한 위치 확인 및 서비스 시스템

The spread of wireless Internet technology development and applications with location information in the form of location-based services are becoming more diverse. In particular, where you recognize the location of objects such as people and things and to provide valuable services based on the ubiquitous and location-based services are emerging as an important service. The collision between the vehicle position measurement in this thesis and offers related service system. Used in the proposed system, the GPS PACKET with information about the location and time of collision for the vehicle crash, the vehicle consists of a NodeID. Cause a conflict between these data at the vehicle, the vehicle through the gateway from the server to decide whether to go on to determine that an emergency situation, Emergency Center, the location information and giving information about whether the conflict is measured. Also, for such an emergency, such as a family on the outside of the wireless terminal related to Wireless (PDA, Phone) is to let me know. The server to want to save the crash information to the database of configuration. Additionally, the proposed U-LBS system to verify the validity of the experiment was performed.

Managing uncertainty in logistics service supply chain

Many third party logistics (3PL) providers in South China are small and medium-sized companies and lack of systematic mean on handling information. Uncertainties are created in the business processes due to insufficient information for decision-making. In this study, a logistics information system called Integrated Logistics Information Management System (ILIMS) is proposed. It aims to manage the information flow efficiently between the involved parties in the logistics supply chain through integrating business processes and increasing information transparency to reduce uncertainty. In addition, it provides an effective channel for the 3PL providers to communicate with different contracted suppliers as well as customers through wireless Internet applications. A case study of applying ILIMS in a local 3PL company is discussed. By using this generic system, supply chain uncertainty that associates with the logistics processes can be reduced and leads to a significant performance improvement in the overall order fulfilment process.

Small-Sized High-Power PIN Diode Switch with Defected Ground Structure for Wireless Broadband Internet

This letter presents a small-sized, high-power single-pole double-throw (SPDT) switch with defected ground structure (DGS) for wireless broadband Internet application. To reduce the circuit size by using a slow-wave characteristic, the DGS is used for the quarter-wave (λ/4) transmission line of the switch. To secure a high degree of isolation, the switch with DGS is composed of shunt-connected PIN diodes. It shows an insertion loss of 0.8 dB, an isolation of 50 dB or more, and power capability of at least 50 W at 2.3 GHz. The switch shows very similar performance to the conventional shunt-type switch, but the circuit size is reduced by about 50% simply with the use of DGS patterns.

Design and implementation of a wireless internet remote access platform

AbstractRecently, mobile networks and internet technologies have been widely developed for the voice communication and information retrieval services all over the world. Compared with the wire‐line internet environment, mobile networks have lower bandwidth, longer transmission latency and unreliable connection, and the capability of mobile terminals is restricted by the limited memory size, lower CPU computation capability and inconvenient I/O interface. These limitations restrict the development of the wireless internet applications. In this paper, we design and implement a ‘wireless internet remote access platform’ (WIRAP). The WIRAP platform interconnects the wireless network and internet to provide mobile users a remote centralized storage and computation environment. A mobile user can store large volume of data and execute complex computations on WIRAP instead of on the mobile terminals. WIRAP supports different network interfaces (e.g. short message service (SMS), wireless markup language (WML) and hyper text markup language (HTML) and users may use terminals (with different network capabilities) to access WIRAP. Copyright © 2006 John Wiley & Sons, Ltd.

위피 응용프로그램 개발환경 설계 및 구현

모바일 인터넷 응용프로그램을 빠르고 저렴한 비용으로 개발하기 위하여 위피 응용프로그램 개발 환경, 즉 CNU 위피 에뮬레이터를 개발하였다. CNU 위피 에뮬레이터는 안정적인 메모리 관리 기능을 가지며, 위피 버전 1.2 규격에서 정의하는 기능과 WAM(WIPI Application Manager)을 이용한 응용프로그램의 설치, 실행, 삭제 및 관리 기능들을 제공한다. 또한 위피 응용프로그램 생명 주기에 맞는 경량 스케줄링 방식을 사용함에 따라 응용프로그램의 빠른 실행과 안정적인 디버깅 기능을 제공한다. 본 논문은 개발한 CNU 위피 에뮬레이터의 설계 및 구현 특징에 대하여 기술하며, 기존 위피 에뮬레이터들과의 비교 실험을 통하여 응용프로그램 실행의 안정성과 <TEX>$25\%$</TEX> 이상의 실행 성능 향상을 제시하였다. We developed the CNU nt emulator which is an development environment for WIPI applications, wireless Internet applications for cellular phones with the WIPI software platform. The CNU WIPI emulator provides stable memory management and ability of installing, executing, deleting or managing WIPI applications. WIPI WAM provides quick execution of applications and convenient debugging function. In this paper, we describe the design, implementation issues of the CNU WIPI emulator and show its correctness of executing and performance improvement over <TEX>$25\%$</TEX> by comparing it with other WIPI emulators.

For here or to go? Downloading music on the move with an ultra reliable wireless Internet application

The maturing distributed file sharing technology implemented by Napster has first enabled the dissemination of musical content in digital form, permitting to customers to retrieve stored music files from around the world. In the post-Napster era, the Apple iTunes online music service has hit a record share of 16.7% in the MP3 player market [J. Mc Hugh, Why Wi-Fi is a good business? Wired (2003) 25–26]. This is only the most prominent example of the success of digital music distribution based on packet network technologies. However, to the best of our knowledge, the most noteworthy aspect of the success of digital music distribution is that little about this music delivery technology is really new. To drastically change the nature of this business, we claim that wireless delivery technology must come into the picture. This way, the digital music delivery model will benefit from the integration of the wired Internet with a broad gamut of wireless access technologies, such as WiFi, WPAN and 3G. In this paper we address the problem of the “customer on the move”; we present a wireless Internet application designed to support the distribution of digital music to handheld devices. The main novelty of our software is the ability to provide a seamless music delivery service even in the presence of handoffs within the same radio medium (horizontal) and across media (vertical). Actual measurements from a deployed application show that our system can deliver a smooth, ultra reliable, low latency music service to mobile users.

Bringing the Wireless Internet to UMTS Devices: A Case Study with Music Distribution

Wireless networking is becoming an increasingly important communication means. Entry points to content delivery networks (e.g. portals) have to cope with the primary necessity of distributing multimedia contents to 3G mobile devices. In this paper we discuss the software architecture of a wireless Internet application we have designed and implemented to support the distribution of Mp3-based songs to 3G UMTS devices. Alongside the operational description of the proposed architecture, efforts have been made to examine the effects that Internet traffic has on the performance of UMTS networks, due to the distribution of Mp3 files by means of our wireless application. The download time measurements we have experimentally obtained show that combining modern 3G mobile network technologies with an appropriate structuring of the wireless Internet application may be very effective for the fast distribution of pre-recorded music to mobile clients.

Interleaved FEC/ARQ coding for QoS multicast over the internet

The technology of real-time reliable multicast over a best-effort service network has become more popular recently. In this paper, a new technique is introduced that integrates word interleaving, forward error correction (FEC) and automatic repeat request (ARQ) to mitigate the error and loss effects encountered in wired and wireless Internet applications. For multicast video sessions spanning tens of routers, the integration of interleaving, FEC and ARQ as well as fine tuning of the various parameters of each mechanism will play a major role in the move towards successful deployment. In this work, the basic algorithms for integrated error control are first derived. Then the corresponding real-time implementations for an experimental testbed to achieve the practical performance of these techniques are completed. The performance of the scheme is analyzed, and laboratory results are compared with analytical results.