Mobile Network Environment Research Articles

Design of Wearable Bio-patch System Platform in Human Healthcare Environment

The process structure of wearable bio-patch information system is organized by the sequence stages from a patch user to background information system through mobile network environment. These information processes show complex and various data formats in wearable bio-patch computing systems. Thus, we need to systemize data structure in viewpoint of bio-information cycle system. In addition, the design of wearable patch platform is required to support continuous research and development of wearable patch systems. Finally, we propose the basic data set and the evaluation functions, which make various bio-information patterns management efficiently.

Efficient content delivery in mobile ad-hoc networks using CCN

Information-centric networking (ICN) is emerging as a future network technology. It has introduced the great advantage of information dissemination with low bandwidth consumption in wired testbed networks. Recently, ICN is also studied for mobile ad-hoc networks environments for efficient content distribution. In the existing works in the literature, broadcast delivery is actively utilized for designing new routing schemes since it seems well fitted to the nature of ICN conceptually. In this paper, we raise questions about this research direction by analysing the performance of reliability and energy efficiency of both broadcast and unicast delivery schemes. Our analysis shows that unicast delivery outperforms broadcast delivery, unless topological changes incur too much packet flooding overhead. Based on this observation, we present a novel energy efficient content distribution scheme that delivers the content in a unicast manner while minimizing flooding overhead by taking advantage of ICN features. Via ns-3 simulation, we compare the performance of the proposed scheme with that of other comparative schemes, and show that the proposed scheme achieves much higher reliability and energy efficiency in content distribution under mobile ad-hoc network environments.

Smart talking robot Xiaotu: participatory library service based on artificial intelligence

Purpose – The purpose of this paper is to introduce a participatory library service based on artificial intelligence (AI). Design/methodology/approach – AI technologies and various technologies for facilitating the use of the currently existing libraries and the third-party resources are combined in the new mobile and social networking environments to provide an innovative real-time virtual reference service. Special aesthetic design and library marketing measures are adopted to expand the gains of the service. Questionnaire survey, in-depth interview, and statistical analysis are conducted to evaluate the effects of the service. Findings – A smart talking robot called Xiaotu (female) is developed. This robot is regarded as a promising new online reference service modus operandi. Four factors contribute to the success of the robot, namely, AI, self-learning, vivid logo and language, and modular architecture. Practical implications – Xiaotu presents a participatory library service, in which users participate in the resources collection and become content co-creators. Her presence at anytime and anywhere on any kind of terminal maximizes her potential for the delivery of virtual reference services. Xiaotu has the potential to be a general reference robot or a costumed institute robot. Originality/value – AI is adopted in libraries to form an innovative online reference service. The participatory library service is practiced through a high-featured interactive communication. The aesthetic design of Xiaotu and the related promotions are new in libraries as well.

Worm propagation model in mobile network

SummaryWith the popularity of mobile smart devices and functional diversification, the infection ways of mobile smartphones worm also become diverse. In mobile networks, mobile devices are suffering from the threat of worms all the time. Once the worm outbreaks, it will bring huge losses to mobile phone users and mobile network operators. Researches on mobile worm propagation model allow us to control and detect potential worm threat, according to the characteristics of worm's outbreak. In the paper, we put forward a worm propagation model based on the mobile network environment. After analyzing the model, we then give the simulation for controlling factors affecting worm propagation. This model allows us to have a certain understanding for the spread on the size and speed of the mobile worm and provide effective methods to control the spread of the mobile worm. Copyright © 2015 John Wiley & Sons, Ltd.

移动社交信息智能态势感知分析

With the rapid rise of microblogging, social networking sites, and mobile Internet, users access to information, public participation, and expression of their demands is increasing significantly. Thus, the challenges faced by public opinion monitoring and guidance are becoming increasingly serious. To address the problems of mobile social network public opinion monitoring, this paper presents an intelligent situation awareness analysis. Intelligent situation awareness combines with the timing of memory hierarchy, extracting information flow characteristics better suited to a highly uncertain, scale-free dynamic information environment, effectively reducing the interference of false alarm history data; is based on robust self-learning screening methods to achieve automatic screening of the node data extraction features and to facilitate the automatic aggregation of situation awareness data in mobile social networking application server environments and unattended scenarios; builds situation knowledge to improve robustness and not lose the characteristics or cause false alarms because of dynamic changes in the network topology of small-world, making situation awareness more suitable for small-world network environments; makes empty inspection matrix scouring the results and eliminating false match points to accelerate visualization. With the maturing of the mobile social networking environment and doubling of the number of users, intelligent situation awareness provides protection to further enhance the level of intelligence of the emergency information platform and facilitate effective monitoring public opinion.

SECURE SIGNATURE BASED CEDAR ROUTING IN MOBILE ADHOC NETWORKS

Mobile adhoc networks are emerging as the most predominant wireless networking, where nodes communicate with each other on adhoc basis. MANETS are self configuring system of mobile nodes and they do not have any centralized resource or any static infrastructure. The most important challenge to be met while designing an efficient and reliable mobile adhoc network is quality of service and security. Adhoc networks have constrained power supply and dynamic topology and hence quality of service and security of the network may be affected. Since adhoc networks carry highly sensitive information in case of defense and military applications, it must be designed in a way to restrict any unauthorized access to the data. Any attack in routing may interrupt, disorder or destroy the overall communication and the entire network may be disabled. Thus, security plays an important role for working of the whole network. Adhoc networks must satisfy quality of service requirement. Assuring high quality of service in ad hoc networks is more difficult than in most other type of networks, because the network topology changes and network state information is generally inaccurate. This requires considerable collaboration between the nodes to establish the route and to provide the QoS. In this paper, CEDAR routing with group signature technique is introduced to satisfy the demand of security and quality of service. CEDAR is a core extraction distributed adhoc routing algorithm for mobile adhoc networks environment. CEDAR is a robust routing method and it provides highly efficient quality of service. CEDAR works on basis of link state bandwidth. It routes the data from one node to another node satisfying the required bandwidth. Group Signatures are used to provide authentication, integration and non repudiation requirements. Signature based CEDAR is used to make sure that communication is secure and information exchanged is correct while maintaining high Qos.

Robust mutual trust architecture for safety critical service in heterogeneous mobile network environment

Wireless network services are more vigorous than ever due to the rapid development of mobile devices such as smartphones. Most mobile devices are evolving into multi-purpose handsets having multiple interfaces and always on, operating in a state that can receive the data any time through these different interfaces. In line with this trend, safety critical services such as e-commerce and on-line financial service have now mostly been used through the mobile environment. Since the Internet service is made up of interaction between the user and the service provider, service safety is based on mutual trust between them. In other words, the user terminal and the service provider system should have confidence in the identities of each other. In heterogeneous mobile network, the user terminal can get access to the service system through diverse access networks simultaneously. So, service provider cannot distinguish which is a valid access for service. In this paper, we propose a mutual trust architecture that can maintain a sustainable secure relation between the user terminal and the safety critical service system by using both personal and network information.

An Integrity Checking Mechanism Using Physical Independent Storage for Mobile Device

The dissemination of smartphones is rapidly progressing and there are many similarities of smartphones and PCs in terms of security risks. Recently, in mobile network environment, there is a trend of increasing damages and now, there are lots of active research on a system that can comprehensively respond to this. As a way to prevent these risks, integrity checking method on operation system is being researched. As most integrity checking algorithms are classified by verification from the levels before booting the OS and at the time of passing on the control to the OS, in which, there are minor differences in the definitions of integrity checking or its methods. This paper researched the verification techniques for OS integrity that can be more fatal than apps in case of security issues, and suggests the integrity verification technique of OS using a boot loader and a physically independent storing device in the terminal.

A Secure Authentication Scheme with User Anonymity for Roaming Service in Global Mobility Networks

In global mobility networks, user authentication is an essential security mechanism that permits mobile users to use the roaming services offered by foreign agents with the support of home agent in mobile network environment. Recently, Rhee et al. analyzed Wu et al. and Wei et al. authentication scheme, and proposed a smart card based user authentication scheme with user anonymity in global mobility networks. However, in this paper, we find that Rhee et al. scheme is vulnerable to user impersonation attacks and off-line password guessing attacks. Moreover, the scheme does not preserve user anonymity; does not provide perfect forward secrecy, and an option to change/update the password; and does not detect wrong password quickly. Hence we propose a secure authentication scheme with user anonymity for roaming service in global mobility networks. Furthermore, performance analysis shows that compared with existing authentication schemes, our proposed scheme is simple and secure.

Personalized and efficient social image transmission scheme in mobile wireless network

This paper presents a Personalized large Social Image Transmission method in mobile wireless network(MWN) environment, called the Psit. The whole transmission process of the Psit works as follows: first, when a social image IS is prepared to transmit from a sender node to user UR, a preprocessing step is then conducted to obtain the optimal image fragment(IF) replica based on the users' preference model and the network bandwidth at the sender node. After that, the candidate IFs are transferred to the receiver node from the slave one according to the transmission priorities. Finally, the IFs can be recovered and displayed at the receiver node level. The proposed method includes five enabling techniques: 1) neighborhood-based tag enrichment processing, 2) user attention degree(UAD) derivation of the regions of interest(ROI), 3) an adaptive multi-resolution-based IF replica selection method, 4) a UAD-based IF replica placement method, and 5) a priority-based robust IF transmission scheme. The experimental results show that the performance of our approach is both efficient and effective, minimizing the response time by decreasing the network transmission cost while increasing the parallelism of I/O and CPU.

QOS - Guaranteed Neighbour Selection &Distributed Packet Scheduling Algorithm byUsing MANET Wireless Networks

The number of Wifi capable mobile devices including laptops and handheld devices (e.g., smart phone and tablet PC) has been increasing rapidly. A Mobile Ad hoc Network (MANET) is consisting of a collection of wireless mobile nodes, which form a temporary network without relying on any existing infrastructure or centralized administration. The emergence and the envisioned future of real time and multimedia applications have stimulated the need of high Quality of Service (QoS) support in wireless and mobile networking environments. The QoS support reduces end-to-end transmission delay and enhances throughput to guarantee the seamless communication between mobile devices and wireless infrastructures. we propose a QoS-Oriented Distributed routing protocol (QOD) to enhance the QoS support capability of hybrid networks. Analytical and simulation results based on the random waypoint model and the real human mobility model show that QOD can provide high QoS performance in terms of overhead, transmission delay, mobility-resilience, and scalability.

Fast Time-Varying Channel Model Research for Data Processing of Wireless

With the complexity and uncertainty of mobile communication network environment, solving the classical mathematical analysis also becomes more complicated. The model tree of basis function method based on Fourier series is proposed in this paper. Model tree method is the improvement of regression tree analysis. Basis function applied here is four-order Fourier series. When the Fourier coefficients are calculated, the Gauss elimination method is implemented for solving equations. The complexity of the algorithm is n3log(n).

A Centralized Comparison of Energy Efficient Routing Protocol for Mobile and Static Wireless Sensor Network

Abstract Wireless sensor network refers to a group of spatially autonomous sensors to monitoring and recording the physical conditions of the environment and organizing the collected data at a central location. MWSNs are much more versatile than static wireless sensor networks as they can be deployed in any scenario and cope with rapid topology changes. The main objective of this research paper is to compare energy efficient based routing protocol for mobile wireless sensor network and static wireless sensor network which will take into account of the efficient clustering along with location management scheme by which its reduce the re-clustering delay as well as lower the energy consumption. As the nodes are mobile, link connectivity is also addressed appropriately. Also consider other factors such as variable time slots duration for nodes at different cluster. This study has evaluated the comparison of mobile and static wireless sensor networks environment taking into consideration average energy consumed, re-clustering delay and network lifetime.

부트로더와 물리적으로 독립된 저장장치를 이용한 모바일 운영체제 무결성 검증

본 논문에서는 보안의 문제가 발생 할 경우 앱보다 치명적일 수 있는 운영체제 무결성에 대한 검증 기법에 대해 연구하였다.최근 스마트폰의 보급은 급속도로 발전하고 있으며, PC와 유사한 서비스를 제공하는 단계까지 왔다. 그리고 그에 따르는 보안 위협도 PC와 유사한 부분이 많다. 최근의 모바일 네트워크 환경에서 단말기의 루트 권한 탈취 및 운영체제 위변조 등에 의한 피해가 날로 늘어나고 있는 추세이며 이를 종합적으로 대응할 수 있는 시스템에 대한 연구가 필요하다. 모바일 위협에 대한 피해를 막기 위한 방법으로 운영체제의 무결성을 검사하는 방법이 사용되기도 한다. 무결성 검증 알고리즘은 운영체제 부팅 이전 레벨에서의 검증과 제어권이 운영체제로 넘어간 시점에서의 검증으로 구분될 수 있다. 무결성 검증은 앱 무결성과 운영체제 무결성으로 나뉘어 볼 수 있는데, 본 논문에서는 부트로더와 단말기 내부의 물리적으로 독립된 저장장치를 이용하여 운영체제의 무결성을 검증하는 기법을 제안하였다. In this paper, we study the verification techniques for OS integrity that can be more fatal than applications in case of security issues. The dissemination of smartphones is rapidly progressing and there are many similarities of smartphones and PCs in terms of security risks. Recently, in mobile network environment, there is a trend of increasing damages and now, there are active researches on a system that can comprehensively respond to this. As a way to prevent these risks, integrity checking method on operation system is being researched. As most integrity checking algorithms are classified by verification from the levels before booting the OS and at the time of passing on the control to the OS, in which, there are minor differences in the definitions of integrity checking or its methods. In this paper, we suggests the integrity verification technique of OS using a boot loader and a physically independent storing device in the mobile device.

유헬스 서비스 기반의 ISO/IEEE 11073-10404 모니터링 시스템 구현

유헬스 서비스는 사물인터넷 장치와 스마트 기기와 같은 모바일 장치를 사용하기 때문에 휴대가 간편한 소형 컴퓨팅 장치로 구성되어 있으며, 기존 컴퓨터에서 수행하던 작업을 동시에 수행할 수 있다. 환자의 생체정보를 이동통신망 환경에서 의료진과 환자 및 환자의 가족의 스마트기기로 실시간으로 전달할 수 있도록 bluetooth HDP기반의 메시지 구조를 사용하였다. ISO/IEEE 11073 PHD 표준을 기반으로 agent와 manager 사이의 통신 방법을 정의하였다. 의료진과 환자 및 환자의 가족이 스마트 기기를 통하여 실시간으로 확인할 수 있도록 안드로이드 기반의 모니터링 애플리케이션을 구현하여 일상생활에서 사용되고 있는 스마트 기기에서 동작을 확인함으로써 생체정보의 원활한 송수신을 확인하였다. The u-health service is using portable device such as smart device and it consists of small computing device. The u-health service carry out same performance with desktop computer. We designed message structure based on Bluetooth HDP. This message structure is used to transmit patient's biometric data on the smart device of medical team, patient and family over the mobile network environment. ISO/IEEE 11073 PHD standard was defined based on the method of communication between the agent and the manager. And We are confirmed the reliable transmission of biometric data at the smart device by implementing the android OS based patient information monitoring application to check the status of patient for medical team, patient and family.

Efficient Personalized Probabilistic Retrieval of Chinese Calligraphic Manuscript Images in Mobile Cloud Environment

Ancient language manuscripts constitute a key part of the cultural heritage of mankind. As one of the most important languages, Chinese historical calligraphy work has contributed to not only the Chinese cultural heritage but also the world civilization at large, especially for Asia. To support deeper and more convenient appreciation of Chinese calligraphy works, based on our previous work on the probabilistic retrieval of historical Chinese calligraphic character manuscripts repositories, we propose a system framework of the multi-feature-based Chinese calligraphic character images probabilistic retrieval in the mobile cloud network environment, which is called the DPRC . To ensure retrieval efficiency, we further propose four enabling techniques: (1) DRL-based probability propagation, (2) optimal data placement scheme, (3) adaptive data robust transmission algorithm, and (4) index support filtering scheme. Comprehensive experiments are conducted to testify the effectiveness and efficiency of our proposed DPRC method.

Selfishness-aware target tracking in vehicular mobile WiMAX networks

The location information of a mobile node is an essential parameter for vehicle monitoring and other location-based services (Junglas and Watson, Commun ACM 51(3):65---69, 2008). The conventional methods used for target tracking, which are applicable for vehicular networks, are either Global Positioning System-based, time of propagation-based or signal strength-based. All of these methods have their own limitations such as additional hardware requirement, power consumption, lack of accuracy, and environmental dependencies. Besides, traditional tracking algorithms do not consider the presence of misbehaving nodes in the network. In this paper, we study target tracking in vehicular mobile WiMAX network environments. We present the proposed Selfishness-Aware Target Tracking (SATT) algorithm. SATT uses time difference of arrival based measurement data when the target is in line-of-sight (LOS) with more than three base stations (BSs). When no more than three LOS links between the target and the BSs are available, then the cluster-head, which serves the target at that instant, activates the three most promising mobile nodes for collecting location information of the target. We use the Stochastic Learning Weak Estimator (Oommen and Rueda, Pattern Recogn 39(3):328---341, 2006) method for keeping track of the misbehaving nodes in the network. The volunteer nodes are selected for target tracking based on this information. Unscented Kalman Filter is used for estimation of the position and velocity of the target. The simulation results show that the SATT algorithm increases the accuracy in tracking information up to 70 % in comparison to the other methods and the algorithm is able to achieve 55---95 % cooperation depending on the degree of misbehavior in the network.

Reduction of Packet Loss by Optimizing the Antenna System and Layer 3 Coding

The article describes the verification of the application of methods of network coding in the mobile wireless network environment with specific antenna system in use. Network coding principles are used for increase the reliability of data transmission. The proposed principles are demonstrated by modelling of the transmission system using data from real mobile networks. The effectiveness of network coding for deployment in wireless mobile networks is demonstrated on the basis of simulation in the simulation environment Omnet++. The input data of the simulation model are obtained by measuring in real mobile network of 2nd generation.

PERFORMANCE ANALYSIS OF RANDOMIZED REVERSE AD HOC ON DEMAND DISTANCE VECTOR ROUTING PROTOCOL IN MANET

In high mobility, routing in Mobile Ad-Hoc Network is a very difficult task. In AODV and RAODV, all the data packets are travel through the same shorte st path so the intruders can easily trace out the d ata path. The main objective of Randomized RAODV provides the multipath and then the paths are selected randomly for security purposes. Using randomized ro uting algorithm to choose the path randomly and then the data packets are travel through different path to reach the destination, so the hackers canno t know about what are the ways the data packets trave rse. The performance of proposed RRAODV is compared with the existing routing protocol like AO DV, RAODV in mobile network environment. Performance metrics such as packet delivery ratio, end to end delay and control packet overhead are evaluated using NS-2 based on the number of nodes and speeds. Simulation results shows RRAODV gives better performance than the existing protocol s like AODV and RAODV for the above metrics. RRAODV is helpful to increase the performance of data transmission and security of data.

Using Cellular Automata to Form an MOTV Society in Mobile Ad-hoc Networks

This paper proposes a novel approach to clustering the interests of mobile users, increasing the lifetime of interest groups, and increasing the throughput in mobile user-to-mobile user environments for mobile IPTV (MOTV) societies. This paper develops an interest ontology of cellular automata (CA) clustering using the zone of interest (ZOI) for mobicast communications in mobile ad hoc network (MANET) environments. The key to the proposed method is to integrate CA clustering with the ontology of users' interests. This paper proposes that both an interest profile (ontology) of users and information about mobile devices can help form a group of MANET-related interests. The current study evaluates the performance of the approach by conducting computer simulations. Simulation results reveal the strengths of the proposed CA-clustering algorithm in terms of increased group lifetime and increased ZOI throughput for MANETs.