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Localization algorithms are required for indoor wireless sensor network (WSN) applications because the identification of real positions can upgrade the importance of sensing information. In this paper, we introduce a efficient algorithm which can improve the accuracy of location identification by employing jumper setting at each sensor. The proposed algorithm perform localization more accurately than...
In this paper, we propose implementation of Internet protocol multimedia subsystem (IMS) for femtocell network. Femtocells designed for deployment in subscriber homes, are generating tremendous excitement among mobile operators. Femtocell promises improved indoor coverage and increased throughput for mobile data services while off-loading traffic from expensive macro radio networks onto the low cost...
In recent years, various wireless access technologies have continuously grown as well as user demands have. However, such user demands have not been satisfied by each wireless access technology alone. Therefore, the Future Generation Networks (FGNs) are proposed to integrate various heterogeneous access technologies in order to support both vertical and seamless handovers. Especially, the IEEE 802...
Sensor network is being used in a variety of areas. As sensor network nodes are evolving into a mobile environment, we should seek an appropriate method to set up clusters and select cluster headers. In this article, we suggest a dynamic prediction clustering algorithm, which uses directions, angles and hops among the dynamic skyline query properties. This proposed algorithm is one that builds clusters...
In this paper, a location aware public/personal diversity of information services based on embedded RFID platform that integrates the existed RFID systems and digital information content services server is proposed. The embedded RFID middleware integration platform included in the proposed system is the main system to manage information from RFID communication system. The platform embedded by RFID...
Existing routing protocols such as AODV were used to simplify the shortest path metric. It assumes that all link quality must be the same. It does not consider link quality such as bandwidth, packet loss rate, packet size, etc. Several performance metrics that consider different link quality for WMNs such as ETX and ETT. Although, these metrics can provide more effective performance than the hop count...
Scalable routing is one of the key challenges in designing and operating large scale MANETs. Performance of routing protocols proposed so far is only guaranteed under the various limitation, i.e., dependent of the number of nodes in the network or needs the location information of destination node. Due to the dependency to the number of nodes in the network, as the number of nodes increases the performance...
In this paper, we modify AODV for MANET nodes to achieve full connection to Internet through multiple mobile gateways. We present a conditional hybrid mobile IP approach to maintain the MANET nodes movement. The mobile gateway selection algorithm can balance the Internet payload among the active multiple mobile gateways. The simulation result shows that our approach achieves excellent connectivity...
In this paper, we present the optimal design methodology and process for traffic channel of M-WiMAX mobile modem ASIC. Under multipath channel environment, the proposed FXP (fixed-point) design method is verified through the performance comparison of BER (bit error rate), and PER (packet error rate) between the FXP model and the FLP (floating-point) model. Trade-offs, such as computing speed, accuracy,...
In modern information society, a high volume of important information is communicated in an on-line network. Specially, mobile environments that handle radio communication are more flexible than wired communication, and are developing rapidly. With the development of mobile environments, sensitive information can be compromised on-line, and demand for security has increased. Therefore TCG (trusted...
With the enormous market potential in the automotive industry and the rapid development of information technology, telematics services have become a novel research and development area in mobile computing and intelligent automobiles. Providers have proposed many telematics services, such as on-demand navigation, emergency road service (ERS), media streaming, insurance and safety features, remote diagnostics,...
Typically, sensor networks consist of fixed sensor nodes. Sometimes, creating such a fixed sensor networks could be a daunting task. Sensor nodes assume deploying a stationary sensor network over a dangerous area such as a battlefield. Even if an advanced method to make the deployment safer is used, diverse element will cause a coverage holes. Even though perfect coverage can be achieved initially,...
This paper presents a referential architecture of an integrated 2D/3D/vector graphic system for mobile handsets. This architecture supports hardware and operating system independence, graphic resource sharing mechanism among graphic libraries, and optimized common system call libraries for graphic processing. With this architecture, we have implemented an integrated graphic library system and applied...
Near Field Communication is a short-range wireless communication technology. The majority of handset manufacturers showed interests in it and invested in developing NFC-enabled devices. Several NFC trials and researches have been launched all over the world. However, these trials only used NFC-enabled handset as a contactless smart card. It did not really reveal the ability of NFC technology. In order...
A mobile ad-hoc network (MANET) is a collection of mobile nodes which communicate over radio. These kinds of networks are very flexible, thus they do not require any existing infrastructure or central administration. Therefore, mobile ad-hoc networks are suitable for temporary communication links. The biggest challenge in this kind of networks is to find a path between the communication end points,...
Wireless mesh networks have been studied as the next generation technology to solve problems of conventional wireless networks. Particularly, mobile WiMAX based wireless mesh networks are noticed due to many advantages. In this paper, we propose a layer-2 handover scheme for mobile WiMAX based wireless mesh networks. A layer-2 handover scheme based on mobile WiMAX causes many handover failures over...
With the development of communication network technology, many studies are being conducted on content protection techniques in the mobile digital contents area as well. In this paper, a mobile DRM system is presented for protection of digital contents based on a three-step authentication process. In this approach, we constructed a secure digital contents distribution system through a three-step user...
With the emergence of the wireless communication technology, it is important to consider the service supporting mobile node. Especially, new multimedia services such as mobile IPTV need multicast technology for efficient delivery of service. Various multicast technologies with use of mobile IP have been suggested, but most of those technologies cannot solve the deployment problem. As an alternative...
With the popularity of Web2.0, web has become to be a application programming platform where third parties can create new applications (mash-ups) mixing the functionality offered by others. Now this trend has extended to the domain of mobile networks. The combination of mashup and mobile networks would make the mashup more powerful and provide additional user value. This paper explores how to realize...
A mobile ad hoc network (MANet) is a flexible way to interconnect mobile devices. Peer-to-peer (P2P) networks are serverless self-organized infrastructures that enable end-to-end communications. The P2P churn and the instabilities of MANETs interconnections bring important challenges to P2P over MANETs(PoM). A consumer peer in PoM wastes several of its scarce resources managing the communication with...
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