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In this paper, we present wired and wireless communicating and sensing technologies for mobile machines. These systems are based on standard technologies but have special features which makes them usable in such professional applications. Implementation of these technologies into several industrial applications has been illustrated. The new technologies give several advantages and benefits for the...
Pseudolite system is good alternative for indoor navigation in where GPS signal can not reach. There are two types of pseudolite system. The one is synchronous system and the other is asynchronous system. For the asynchronous system, user requires RF link to be provided augmentation data for timing and reference station for monitoring timing offsets of pseudolites. For the synchronous system, User...
This paper presents a synchronization method for the 18000-3 PJM mode, along with the hardware structure to implement the proposed method. The proposed system detects an incipient peak using a ITS(Initial Time Selector) and a correlator. Once a peak is detected, it starts to demodulate, checking MFM state, until it detects the occurrence of the violation bit, which can acknowledge the payload beginning...
In this paper we present the early development phases of an occupancy monitoring sensor system for an intelligent sofa and related user and service scenarios in the context of living environment for older persons. The paper presents details of the technical solution of the intelligent sofa and the test results of its laboratory use. Information integration concept with other elements in the case environment...
This paper proposed a real-time children location detection system using combined GPS module and Zigbee module. When the systems detect child's presence, they have to transmit the alarm data to a remote center, connect to CCTV system. This paper shows the experimental result whether the children is, or not, in school zone. Also the proposed GPS and Zigbee system may be extended to various application...
As SIP (Session Initiation Protocol) has been adapted as a main session control protocols for major SDOs, the volume of Internet telephony has been increased remarkably. Furthermore, the need of VoIP has been extended to the mobile Internet. There are three major smartphone OS; iOS, Android, Windows Mobile. Hence, it is required to implement SIP-based Internet telephony applications to each smartphone...
As the importance of non-functional requirements has increased, many researchers have become interested in software development process for non-functional requirements including the notation, modeling, and assessment of non-functional requirements. However, the characteristics of non-functional requirements are so sophisticated that there have been many topics that should be defined more clearly....
This paper proposes a stochastic end-to-end response time analysis of pipelined manufacturing systems based on machine-to-machine communication, where every control message initiating from the first stage is relayed to the next stages along the pipeline. Through the proposed analysis, we can compute the end-to-end response time distribution of each control message, thus provide predictable performance...
The autonomous military robot system is a complex hybrid system which is difficult to represent by ordinary modeling frameworks due to its continuous behaviors. In this paper, we present a case study to formally model this system using CHARON that is a hierarchical modeling framework for hybrid systems. To precisely capture all the behaviors of the military robot system, we propose several extensions...
In Cyber-Physical Systems (CPS), computer systems are invisible, but they are embedded in real-world entities, which are monitored and controlled. A key challenge of CPS is to assure high reliability in a scalable and dynamic computing environment in the presence of frequent data propagation among CPS nodes. To effectively manage such data delivery, CPS may need a data-centric middleware, such as...
In this paper, we introduce Advanced Metering Infrastructure of KEPCO. This article provides the experience and know-how about AMI trial carried out in 65,000 households. It contains a variety of information related to system architecture, characteristics of developed devices. Also the future plan is presented.
In this paper, we build a framework for maximizing the utilization of solar-based harvesting energy in sensor networks. For this goal, we analyze the required power at each relay node and give the queueing framework for the power management. In the simulation, our proposed algorithm shows a superior performance than conventional ones in terms of the PRR (Packet Reception Rate) for a day according...
To improve the bandwidth efficiency of the classical orthogonal cooperative transmission scheme while maintaining the cooperative gain, a novel non-orthogonal amplify-and-forward cooperative scheme based on distributed space-time code is proposed. In this scheme, the orthogonal characteristic of Alamouti space-time code is utilized to make cooperative users relay on the shared channel resources so...
As the interests of broadcasting services in mobile networks are increased, the research of convergence services of broadcasting and communication has become popular. To support broadcasting services in cellular network smoothly, WiBro support the multicast and broadcast service (MBS). MBS is transmission method that base stations belong to same MBS zone transmit the data to all users who request...
In this paper, we propose ℓ2-norm of k-set correlation as a new performance measure for compressive sensing matrices. We show that this measure is highly related to restricted isometry property. And we also demonstrate by simulation that it works well as a performance measure of sensing matrices.
DFT (discrete Fourier transform) spreading OFDM (orthogonal frequency division multiplexing) system is used as a promising technique to solve high PAPR (peak to average power ratio) problem of OFDM system. DFT spreading system is much sensitive than OFDM system against jamming signal because jamming signal is divided into all sub-carrier by IDFT process of DFT spreading OFDM although it has better...
Mobile WiMAX is emerging as one of the most promising systems for 4th generation mobile wireless networks where mobile TV services are foreseen to be proliferated. These applications are bandwidth hogs which cause a challenging capacity problem. To address this challenge, a novel mobile TV services over WiMAX network, called wireless switched digital video (WSDV), is proposed in this paper. Unlike...
We propose a Network Allocation Vector (NAV) based Load Aware Routing (NA-LAR) protocol for Wireless Mesh Networks. NA-LAR is basically based on the Directional AODV (D-AODV)) to reduce the number of route request packet broadcast by using a restricted directional flooding technique. It also considers network conditions with NAV which indicates the busyness of the medium in IEEE 802.11, and it is...
Advances in hardware development enable the creation of tiny and inexpensive sensor network devices which are widely disseminated in our daily life, and take a significant role in developing ubiquitous sensor networks (USNs). As the architecture of the sensor networks becomes to rely on the applications more heavily, we believe that it is considerably important to come up with USN middleware which...
As software entities that migrate among nodes, mobile agents (MAs) are able to deliver and execute codes for flexible application re-tasking, local processing, and collaborative signal and information processing. In contrast to the conventional wireless sensor network operations based on the client-server computing model, recent research has shown the efficiency of agent-based data collection and...
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