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Sensor device is emerging as a promising enabler for the development of new solutions in a plethora of Internet of Things (IoT) applications. With the explosion of connected devices, it is essential for conversion gateway between the Internet and sensor nodes to support end-to-end (e2e) interoperability because the current Internet Protocol (IT) does not support end-to-end delay in IEEE 802.15.4e. As part of IoT, we propose a scheduling scheme of multiple channels and multiple timeslots to minimize the e2e delay in multi-hop environments. The proposed greedy heuristic approach is compared with the meta-heuristics in terms of the given end-to-end delay bound. Although the meta-heuristics is more accurate in finding a global optimum or sub-optimal values than the greedy heuristic approach, this advantage comes at the expense of high complexity. The simulation results show that the proposed scheme reduces the complexity by obtaining suboptimal solutions that satisfy the e2e delay requirement.

This paper proposes a novel scheduling algorithm using multi-channel and multitimeslot with the objective of reducing the end-to-end (e2e) delay in a tree-based wireless sensor network. The algorithm exploits a staggered timeslot allocation in terms of e2e paths, rather than the one with individual branches. It also increases simultaneous data transmissions. The proposed algorithm is shown to be superior to an existing algorithm with non-e2e delay based, in terms of e2e delay.

Due to the advancements in the capabilities of smart devices and home networks, we are able to easily access multimedia contents stored in a home server. In this paper, we present a wireless media content sharing mechanism for home networks that utilizes UPnP-based DLNA technology. We also present a novel Peer-to-Peer content sharing system that is able to operate on the client as well as server. Our system supports multiple push/pull services simultaneously via a multi-thread technique, and our intuitive user interface facilitates ease of use. Future studies would explore the feasibility of implementing our system in a multi-hop environment or providing a community-wide service.

The main issues of the researches are monitoring environment such as weather or temperature variation and natural accident, and sensor gateways which have mobile device, applications for mobile health care. In this paper, we propose the SFMS(Smart Factory Management System) that can effectively monitor and manage a green smart factory area based on M2M service and smart phone with android OS platform. The proposed system is performed based on the TinyOS-based IEEE 802.15.4 protocol stack. To validate system functionality, we built sensor network environments where were equipped with four application sensors such as Temp/Hum, PIR, door, and camera sensor. We also built and tested the SFMS system to provide a novel model for event detection systems with smart phone.

In this paper, how fast and accurate the companies provides exponentially increasing information to the users is the most important in the corporate competitiveness. The enhancement of the retrieval relevance became the important element in enhancing company competitiveness and it is required to provide the services that are beyond simple retrieval service for good quality search service. This paper proposes the effective scheme that enhances retrieval relevance by utilizing registered tag information. By proposed scheme, we can overcome the limitations of retrieval relevance that usual search engines provide. And we compare the proposed scheme with existing web retrieval service on retrieval relevance evaluation and related search keyword.

The most critical element in the real-time operation of RFID application programs that are suitable for the mobile environment is the RFID middleware, made exclusively for mobile handsets, which processes collected data on a real-time basis and sends only the useful information to the application client. In this paper, we intend to design and implement the Pet management system for optimized mobile RFID middleware that supports real-time data processing. The proposed Pet management system consists of registration module, retrieval module, communication module, and display module in order to display retrieval result from server. Also, the captured data in the PDA is transmitted to the server and another client system using the mobile application interface that supports the SOAP application access protocol.

In order to control moving facilities on a remote place effectively, it are required to acquire a environment informations such as images where the moving facilities are placed. However, since there is no tools to acquire such informations to the central control system based on the non-networked sensor environments, it is difficult to control the moving facilities remotely. Therefore, we design and implement the Zigbee based image transmission system and communication protocol to control the moving target remotely. The wireless control utilizing the Zigbee protocol is that electrically consumption is more small than the Bluetooth and reliability of data transmission is better. The implemented Zigbee based control systems and communication protocol have the normal and replay function for a realtime control of the moving target under the server PC and the mobile FDA with the WiFi protocol. The functional operability and performance are analyzed by a designed prototype under the wireless home network environment.

In this paper, the RFID middleware system that can process bulk data in real time has been designed and implemented. The characteristics of this middleware system support the following points: Expandability and integration of infrastructure, processing the bulk data coming from heterogenous readers in real time, management of the integrate process, Java based XML, and lightweight-oriented technology for speedy and efficient performance. Also a filter file managing process(XML Process) is designed to process bulk data in real time. With this processor in place, the middleware can run without any problem even when several clients from many locations get connected to the server at the same time. The RFID middleware system consists of reader interface, event manager, application interface, and an adapter for heterogenous readers. In the integrated function test of the RFID middleware system, the system showed a stable performance in processing even thousands of filtering and tag data per second, and was able to process the bulk tag data from heterogeneous readers in real time. Also from the test of the implemented filtering management system interlocked with the RFID middleware and the client, it was confirmed that the RFID middleware and the filtering management system ran properly.

The animatronics technique could be very important fact of technique not only to achieve full completion of visible image but also to offer lots of chances to express images by merging CG, special effects and special devices. In this thesis, we design and implement the Zigbee-based wireless transceiver and communication program to control animal animatronics such as a dog and bear. The wireless control utilizing the Zigbee protocol is that electrically consumption is more small than the Bluetooth and reliability of data transmission is better. The implemented control systems and program have the normal and replay function for control of animal models. This functions and operability are tested by a designed animatronics prototype under the wireless environment.

The most critical element in the real-time operation of RFID application programs that are suitable for the mobile environment is the RFID middleware, made exclusively for mobile handsets, which processes collected data on a real-time basis and sends only the useful information to the application client. In this paper, we intend to design and implement a mobile RFID middleware system that supports the mobile handset environment for real-time based processing of the necessary data in the mobile environment. The proposed mobile RFID middleware system includes a mobile reader interface that collects the tag data, a mobile filtering engine that processes the tag data into more meaningful data that is sent to the application interface, and finally the mobile application interface that supports the m-SOAP application access protocol for interfacing with existing mobile applications. The filtering speed of the newly-developed middleware engine was found to be suitable for the characteristics of mobile handsets.

We completed a new cluster system based on WDM by proposing virtual topology reconfiguration schemes. The key idea of the proposed scheme Is to construct a set with the longest chains of requests of connecting nodes which need to be assigned a wavelength. All the sets have no common factor, that is, there is no duplicated link among the requests of connecting. After making the set satisfying this condition, we could assign a wavelength to per corresponding set. We could reconfigure a virtual topology with this scheme collectively. we compared our scheme to existing approaches by the OWns simulation tool. As the results, we gained improved performances, reducing 10% of blocking rate and improving 30% of ADM utilization in terms of the blocking probability and the ADM utilization.

We design a filtering management scheme with synchronization function under a realtime RFID middleware system for larger-scale data processing. The application interface(AI) is to support a various access protocol, HTTP, XML, JMS, and SOAP for the RFID applications. Generally, the synchronization problem is occurred in multiple accessing of clients for single filtering file. In this paper, we implement a filtering management scheme supporting the synchronization using the filter management process, and then demonstrate the RFID middleware filtering scheme.

We implement the RFID middleware system based on XML for large-scale data processing. The Implemented middleware system are consist of the reader interface for tag data collection, the event manager for a data filtering, and application interface for the RFID application. The implemented RFID middleware system is to support both a fixed type`s reader and portable type`s reader. we analyze the middleware function with four application accessing protocol, HTTP, XML, JMS, and SOAP, and demonstrate a filtering speed in terms of CPU utilization.

In mobile Internet, the host grouping maintenance or the multicast delivery tree for multicasting algorithm becomes a major issues. In this paper, we explore the issues of mobile multicast scheme using mobile-IPv6. Specifically, we address operation scenarios when a mobile host is a source as well as a recipient of a given multicast operation using MLD (multicast listener discovery) scheme, and the proposed MLD-based multicasting protocol, MIP-MLD uses a smooth handoff technique to reduce the service disruption for the multicast session during the handoff. We compared our scheme to existing approaches by cost analysis model, and gained an improved performance in terms of the multicast delivery path.

This paper explores the issues of mobile multicast scheme using Mobile-IPv6, and addresses the case when a mobile host is a source as well as a recipient of a given multicast operation. A new multicast routing protocol, called MSMA(MLD-based mobile multicast for handling Source Mobility in All-IP networks), with the MLD(Multicast Listener Discovery) and MDA(Multicast Delivery Agent) functionality to mobile hosts in Mobile-IPv6 based All-IP networks is proposed. The proposed MLD-based multicasting protocol asks its HA(Home Agent) to stop forwarding multicast for group using tunneling. Thus, the proposed protocol satisfies the maximum tolerable transfer delay and mitigates the forwarding task of HA.

Efficient retrieval of software components is an essential aspect of component-based software development. Enhancing the retrieval of such components has been the focus of significant prior research. We propose a new component retrieval method using a synaptic connectivity matrix. This new method supports queries with logical operators, which are not supported by existing facet retrieval methods. We show that the search complexity is considerably reduced with our proposed method.

We propose a new ATM switch architecture with output queueing. The proposed switch, FBSF (FAB Banyan switching fabrics) can deliver up to 2r packets simultaneously destined for the same outlet in a single time slot. Unlike the existing switches with multiple outlets where r parallel N/spl times/N networks are used to deliver more than one packet to each output port, the proposed FBSF switch uses only two N/spl times/N FAB networks, resulting in a simpler hardware implementation. The switch fabric consists of Batcher sorter; a radix-r double shuffle network, r-packet distributors, two FAB networks, and output buffer modules. The proposed FBSF switch also supports multimedia traffic such as voice and compressed video data as well as text data. The performance of the switch fabric is evaluated by measures of throughput, packet delay, and packet loss probability. The numerical results show that nearly perfect throughput can be archived by the proposed switch in the case where r/spl ges/2.

In this paper, we propose a new ATM switch architecture with output queueing. The proposed switch, FBSF (FAB Banyan Switching Fabrics) can deliver up to 2r packets simultaneously destined for the same outlet in a single time slot. The switch fabrics consists of Batcher sorter, a radix-r double shuffle network, r-packet distributors, two FAB networks, and output buffer modules. The performance of the switch fabric is evaluated by measures of throughput, average queue length, and average waiting time. Numerical results indicate that the switch exhibits very good delay-throughput performance over a wide range of input traffic.

We propose the adaptive separated-queueing asynchronous transfer mode (ATM) switching model for the effective processing of the various types of multimedia traffic by virtue of ATM switching network with multiple outlets which the essential part of the B-ISDN. This proposed model employs the dynamically separated buffering mechanism in the processing of two classes of cell, real-time service traffic and non-real-time service traffic, at the output buffer to enhance the overall QoS (quality of service). For the performance evaluation of our proposed method, we have done both analytical modeling and simulation. The experimental results show that our proposed queueing strategy is quite appropriate to the ATM switch with multiple outlets and can guarantee the QoS requirements of the incoming multimedia traffic.

We present a detailed analysis of the performance of queueing schemes in the Batcher-banyan networks with multiple outlets. Each queueing scheme is analyzed under different traffic distributions. In the Batcher-banyan networks with higher switching speedup, the performance of buffering techniques affect the switching system performance and are also related to input and output traffic distributions. Therefore, we investigate queueing schemes for several Batcher-banyan networks using our proposed analysis model. Numerical results indicate that the queueing performance such as switching throughput, latency, and packet loss rate for several Batcher-banyan networks are closely affected by input traffic distribution.