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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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The Journal of Korean Institute of Communications and Information Sciences
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The Korean Institute of Communications and Information Sciences
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Volume & Issues
Volume 37C, Issue 12 - Dec 2012
Volume 37B, Issue 12 - Dec 2012
Volume 37A, Issue 12 - Dec 2012
Volume 37C, Issue 11 - Nov 2012
Volume 37B, Issue 11 - Nov 2012
Volume 37A, Issue 11 - Nov 2012
Volume 37C, Issue 10 - Oct 2012
Volume 37B, Issue 10 - Oct 2012
Volume 37A, Issue 10 - Oct 2012
Volume 37C, Issue 9 - Sep 2012
Volume 37B, Issue 9 - Sep 2012
Volume 37A, Issue 9 - Sep 2012
Volume 37, Issue 8C - Aug 2012
Volume 37, Issue 8B - Aug 2012
Volume 37, Issue 8A - Aug 2012
Volume 37, Issue 7C - Jul 2012
Volume 37, Issue 7B - Jul 2012
Volume 37, Issue 7A - Jul 2012
Volume 37, Issue 6C - Jun 2012
Volume 37, Issue 6B - Jun 2012
Volume 37, Issue 6A - Jun 2012
Volume 37, Issue 5C - May 2012
Volume 37, Issue 5B - May 2012
Volume 37, Issue 5A - May 2012
Volume 37, Issue 4C - Apr 2012
Volume 37, Issue 4B - Apr 2012
Volume 37, Issue 4A - Apr 2012
Volume 37, Issue 3C - Mar 2012
Volume 37, Issue 3B - Mar 2012
Volume 37, Issue 3A - Mar 2012
Volume 37, Issue 2C - Feb 2012
Volume 37, Issue 2B - Feb 2012
Volume 37, Issue 2A - Feb 2012
Volume 37, Issue 1C - Jan 2012
Volume 37, Issue 1B - Jan 2012
Volume 37, Issue 1A - Jan 2012
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Design and Implementation of the Higher-quality Terrestrial 3DTV Broadcasting Standard Specification Based on Synchronization with Non-Real-Time Contents
Lee, Jangwon ; Kim, Kyuheon ; Yim, Hyun-Jeong ; Cheong, Won-Sik ;
The Journal of Korean Institute of Communications and Information Sciences, volume 37C, issue 12, 2012, Pages 1185~1194
DOI : 10.7840/kics.2012.37C.12.1185
This paper proposes a new terrestrial 3DTV broadcasting standard specification based on synchronization with non-real-time contents in order to overcome quality limitations of the current 3DTV services that are arisen from the limited bandwidth of the legacy broadcasting channel. In the services using the proposed specification, one view sequence of a stereoscopic video content is delivered as a non-real-time content in idle time, and the other view sequence is transmitted in real time broadcasting signal, thereafter two sequences are synchronized in a receiver for display. Thus, it is possible to provide higher-quality stereoscopic video content services than the current 3DTV services. In order to realize these services, a new mechanism is required which enables synchronization between the data that are from different transmission media and time. Therefore, this paper suggests a solution by multiplexing the synchronization signals of non-real-time contents into broadcasting signals with real-time streams together. This solution can provide a accurate synchronization mechanism by minimum updates of legacy broadcasting systems while maintaining compatibility with legacy services.
An Implementation and Extension of GMPLS PCE Protocol for Carrier Ethernet Topology Discovery and Configuration
Shin, Min-Seop ; Choi, Jin-Seek ;
The Journal of Korean Institute of Communications and Information Sciences, volume 37C, issue 12, 2012, Pages 1195~1210
DOI : 10.7840/kics.2012.37C.12.1195
In this paper, we propose a new signaling protocol as an extension of Generalized Multi-Protocol Label Switching (GMPLS) based PCE protocol for control carrier ethernet. The proposed protocol is not only compatible with the GMPLS PCE standard protocol, but also provides the topology discovery and configuration. In order to verify interoperability, we implement the proposed protocol as well as the system integrating functions including commercial system for testbed. In addition, we have simulated topology discovery test for proposed protocol performance.
Protection Distance Calculation Between Inductive Systems and Radiocommunication Services Using Frequency Below 30 MHz
Shim, Yong-Sup ; Lee, Il-Kyoo ; Park, Seung-Keun ;
The Journal of Korean Institute of Communications and Information Sciences, volume 37C, issue 12, 2012, Pages 1211~1221
DOI : 10.7840/kics.2012.37C.12.1211
This paper describes separation distance to protect radiocommunication services from the interference of inductive systems using frequencies below 30 MHz for the co-existence between radiocommunication services and inductive systems. For the analysis, the interference scenario model is proposed between inductive system and radiocommunication services. Then the calculation method of protection distance is suggested by comparing the radiation power of inductive system with the allowable interference level of victim services, radiocommunication services, according to the applied propagation model. Also, the protection distance for protecting radiocommunication services in the 30 MHz below is calculated through the interference analysis from RFID(Radio Frequency IDentification) and PDP(Plasma Display Panel) TV based on the suggested method. The proposed calculation method was adopted as ITU-R recommendation in related with resolution 63 at ITU-R SG(Study Group) 1 meeting in June, 2012. It will be available to use for the protection of radiocommunication services from the interference of wireless power transfer system and power line telecommunication system.
International Standardization and Implementation of Home Energy Saving System for Smart Grid
Choi, Kwang-Soon ; Lee, Sang-Won ; Park, Young-Choong ; Jung, Kwang-Mo ;
The Journal of Korean Institute of Communications and Information Sciences, volume 37C, issue 12, 2012, Pages 1222~1229
DOI : 10.7840/kics.2012.37C.12.1222
For the reduction of electric energy consumption and its efficient use at homes or buildings, a new work item proposal for new architecture and functional requirements of Energy Saving System (ESS) was proposed to IEC TC 100 and accepted as a new project, IEC PT 62654 in 2009. Recently, the final ballot for publication passed without negative votes and IEC TS 62654 was finally published in August 2012. For the verification of this standard, Prototype of ESS system composed of an ESS server, ESS clients, and portable ESS terminal were especially implemented in parallel with the standardization. Electric Power Control and Management (EPCM) protocol for the communication between ESS server and clients was also implemented, which supports self-configuration of ESS network, power consumption monitoring, remote power control, and additional functions for intelligent energy saving services.
Implementation and Standardization of an IPTV Terminal Provisioning Procedure
Cho, Sungsoo ; Kim, Kyoungyoul ; Choi, Hyungi ; Kim, Hyoungsoo ;
The Journal of Korean Institute of Communications and Information Sciences, volume 37C, issue 12, 2012, Pages 1230~1244
DOI : 10.7840/kics.2012.37C.12.1230
To boost the IPTV industry, it has being considered to provide terminal portability from one service provider to another for users. If the terminal portability is guaranteed, then a service user can purchase an IPTV terminal in a market and select an IPTV service provider. For this, the IPTV terminal should process a series of pre-configuration, so called provisioning procedure. Telecommunications Technology Association (TTA) established the standard of IPTV terminal provisioning procedure, TTAK.KO-08.0026. In this paper, we explain the revised standard TTAK.KO-08.0026/R2, and introduce the architecture, functions, operating procedures and parameters of the IPTV terminal provisioning system that we implemented based on it. Finally, we discuss the future issues of the standard of the IPTV terminal provisioning procedure.
Averaging Methods for Enhancing the Performance of DOA Estimation Under the Rotor Effect
Yun, Seonhui ; Oh, Jongchan ; Kim, Jun O ; Choi, Sangwook ; Ahn, Jae Min ;
The Journal of Korean Institute of Communications and Information Sciences, volume 37C, issue 12, 2012, Pages 1245~1255
DOI : 10.7840/kics.2012.37C.12.1245
There are various anti-jamming algorithms for the GNSS system which is vulnerable to jamming, and the methods using array antenna show the best performance. Among them, the DOA estimation algorithms to identify the location of the jammer is very important. However, in case of the rotorcraft, the wireless channel which amplitude and phase changes with time is generated by the rotation of the rotor and it affects the performance of existing anti-jamming algorithms. In this paper, we modeled the effect of the rotor in four scenarios according to the correlation of antennas and assured that the performance of DOA estimation algorithms are degraded and saturated regardless of JNR due to the rotor effect. When we use the averaging method to solve this problem, the performance is improved as increasing samples for estimating. And in case of using moving average method with averaging, it shows similar performance. In addition, it reduces the required memory and moderates the variation of DOA estimation.
Secure Routing Protocol in Cluster-Based Ad Hoc Networks
Min, Sung-Geun ; Park, Yo-Han ; Park, Young-Ho ; Moon, Sang-Jae ;
The Journal of Korean Institute of Communications and Information Sciences, volume 37C, issue 12, 2012, Pages 1256~1262
DOI : 10.7840/kics.2012.37C.12.1256
Mobile ad hoc networks (MANETs) are infrastructure-less, autonomous, and stand-alone wireless networks with dynamic topologies. Recently, cluster-based ad hoc networks which enhance the security and efficiency of ad hoc networks are being actively researched. And routing protocols for cluster-based ad hoc networks are also studied. However, there are few studies about secure routing protocols in cluster-based ad hoc networks. In this paper, we propose secure routing protocol for cluster-based ad hoc networks. We use Diffie-Hellman key agreement, HMAC, and digital signature to support integrity of routing messages, and finally can perform secure routing.
Design and Implementation of Livestock Disease Forecasting System
Kim, Hyun-Gi ; Yang, Cheol-Ju ; Yoe, Hyun ;
The Journal of Korean Institute of Communications and Information Sciences, volume 37C, issue 12, 2012, Pages 1263~1270
DOI : 10.7840/kics.2012.37C.12.1263
Livestock disease that decreases the farm productivity and income leads to not only financial loss but also national loss from the spread of contagious disease. The purpose of this paper is to propose a livestock disease forecasting system that can diagnose disease of livestock at an early stage based on the livestock activity and body temperature. The proposed livestock disease forecasting system collect data on livestock activity and body temperature using a acceleration sensor and thermal imaging camera and comparing the data with control according to disease. It is expected that, this system can be accurately identify and prevent spread of livestock disease beforehand to minimize damages caused by disease to improve the productivity and the rate of return of livestock farms.
An Accurate Moving Distance Measurement Using the Rear-View Images in Parking Assistant Systems
Kim, Ho-Young ; Lee, Seong-Won ;
The Journal of Korean Institute of Communications and Information Sciences, volume 37C, issue 12, 2012, Pages 1271~1280
DOI : 10.7840/kics.2012.37C.12.1271
In the recent parking assistant systems, finding out the distance to the object behind a car is often performed by the range sensors such as ultrasonic sensors, radars. However, the installation of additional sensors on the used vehicle could be difficult and require extra cost. On the other hand, the motion stereo technique that extracts distance information using only an image sensor was also proposed. However, In the stereo rectification step, the motion stereo requires good features and exacts matching result. In this paper, we propose a fast algorithm that extracts the accurate distance information for the parallel parking situation using the consecutive images that is acquired by a rear-view camera. The proposed algorithm uses the quadrangle transform of the image, the horizontal line integral projection, and the blocking-based correlation measurement. In the experiment with the magna parallel test sequence, the result shows that the line-accurate distance measurement with the image sequence from the rear-view camera is possible.
Design and Implementation of the Multi-Mode Mobile Broadcasting EWS Encoding and Decoding Systems
Kwon, Ki Won ; Park, Yong Suk ; Park, Se Ho ; Paik, Jong Ho ;
The Journal of Korean Institute of Communications and Information Sciences, volume 37C, issue 12, 2012, Pages 1281~1288
DOI : 10.7840/kics.2012.37C.12.1281
This paper presents the design and implementation of a multi-mode mobile broadcasting Emergency Warning System (EWS) transmission and reception system which enables the propagation of disaster information using the encoding and transmission, reception and decoding methods specified in diverse mobile broadcasting standards. The implemented system supports global mobile broadcasting standards such as Terrestrial Digital Multimedia Broadcasting (T-DMB), Digital Video Broadcasting-Handheld (DVB-H), Integrated Services Digital Broadcasting-Terrestrial (ISDB-T), and the Digital Radio Mondiale (DRM) digital radio standard. The system consists of two key part: an encoding/transmission part and a reception/decoding part. The multi-mode mobile broadcasting EWS encoding and transmission system generates EWS data according to each broadcasting specification. The generated EWS data is then transmitted through a channel interface which meets the commercial broadcasting equipment specification. The receiver system receives and decodes the EWS data on a single hardware platform and can display the results on screen. Verification and conformity testing has been carried out on the implemented system by transmitting emergency data for each mode in real-time and displaying the received information in text on the receiver display.
Digital Predistortion Technique for MIMO Transmitters
Jeong, Eui-Rim ;
The Journal of Korean Institute of Communications and Information Sciences, volume 37C, issue 12, 2012, Pages 1289~1295
DOI : 10.7840/kics.2012.37C.12.1289
An adaptive digital predistortion (PD) technique is proposed for linearization of power amplifiers (PAs) in multiple-input multiple-output (MIMO) transmitters. We consider a PD structure equipped with only one combined feedback path while conventional systems have multiple feedback paths. Hence, the proposed structure is much simpler than that of multiple feedback paths. Based on the structure, a new PD algorithm is derived. The simulation results show that linearization performance of the proposed method is almost the same as the conventional multiple feedback technique while the former is much simpler to implement than the latter.
GA-Enhanced Dual-Band Aperiodic Linear Dipole Array with Low Sidelobe Level
Son, Trinh-Van ; Kwon, Gina ; Hwang, Keum Cheol ; Park, Joon-Young ; Kim, Seon-Joo ; Kim, Dong-Hwan ;
The Journal of Korean Institute of Communications and Information Sciences, volume 37C, issue 12, 2012, Pages 1296~1302
DOI : 10.7840/kics.2012.37C.12.1296
In this research, optimization of a dual-band dipole array was performed using genetic algorithm. A non-uniform, aperture-shared linear array was configured with dipoles which resonate at 4 GHz and 9.5 GHz. The excited current distributions on dipoles were computed considering mutual coupling between dipole elements. The current distributions were also computed using method of moment (MoM). The optimization using genetic algorithm was performed to obtain the low sidelobe levels in two operating frequency band. The PSLs of the optimized array for 4 GHz and 9.5 GHz are -15.7 dB and -17 dB, respectively. Comparison between computed and simulated results are also discussed.
Analysis of Multicast Handover Scheme for Next Generation Access Networks
Lee, Young-Suk ; Lee, Dong-Soo ; Kim, Young-Han ;
The Journal of Korean Institute of Communications and Information Sciences, volume 37C, issue 12, 2012, Pages 1303~1309
DOI : 10.7840/kics.2012.37C.12.1303
In this paper, we propose a handover scheme for seamless mobile multicast service in next generation access networks. For this, we drew optimum handover scheme when applying MIP(mobile IP), FMIP(Fast MIP), HMIP(Heterogeneous MIP), PMIP(Proxy MIP) to XG-PON1. And, we analyze handover scheme for seamless mobile multicast service in XG-PON1. The prosed handover scheme remove tunnel convergence and reduces handover delay, packet delivery cost.
Analysis of GPS Galileo Time Offset Effects on Positioning
Joo, Jung-Min ; Cho, Jeong-Ho ; Heo, Moon-Beom ;
The Journal of Korean Institute of Communications and Information Sciences, volume 37C, issue 12, 2012, Pages 1310~1317
DOI : 10.7840/kics.2012.37C.12.1310
The Global Navigation Satellite System (GNSS) like US Global Positioning System (GPS) and EU Galileo are based on providing precise time and frequency synchronized ranging signals. Because of the exploitation of very precise timing signals these GNSS are used to provide both navigation and time distribution services. Moreover, because the positioning accuracy will improve as more satellites become available, we should expect that a combination of Galileo and GPS will provide better performance than those of both systems separately. However, Galileo will not use the same time reference as GPS and thus, a time difference arises - the GPS-Galileo Time Offset (GGTO). The navigation solution calculated by receivers using signals from both navigation systems will consequently contain a supplementary error if the GGTO is not accounted for. In this paper, we compared GPS Time (GPST) with Galileo Sytem Time (GST) and analyzed the effects of GGTO on positioning accuracy by simulation test. And then we also analyzed the characteristics of two representative GGTO correction methods such as the navigation message based method at system level and the estimation method at user level and propose the conceptual design of the novel correction method being capable of preventing previous method`s problems.
Development of Livestock Traceability System Based on Implantable RFID Sensor Tag with MFAN
Won, Yun-Jae ; Kim, Young-Han ; Lim, Yongseok ; Moon, Yeon-Kug ; Lim, Seung-Ok ;
The Journal of Korean Institute of Communications and Information Sciences, volume 37C, issue 12, 2012, Pages 1318~1327
DOI : 10.7840/kics.2012.37C.12.1318
With the recent increased risk of livestock disease spread and human infection, livestock disease control has become very important. Consequently, there has been an increased attention on an implantable real-time monitoring and traceability system for individual cattle. Therefore, we have developed a robust monitoring and traceability system based on an implantable MFAN/RFID sensor tag. Our design combines the MFAN technology that is capable of robust wireless communication within cattle sheds and the 900MHz RFID technology that is capable of wireless communication without battery. In MFAN/RFID implantable sensor tag monitoring system, UHF sensor tag is implanted under the skin and accurately monitors the body temperature and biological changes without being affected by external environment. In order to acquire power needed by the tag, we install a MFAN/RFID tranceiver on the neck of cattle. The MFAN coordinator passes through the MFAN node and the RFID-reader-combined MFAN/RFID transceiver and transmits/receives the data and power for the sensor tag. The data stored in the MFAN coordinator is transmitted via the internet to the livestock history monitoring system, where it is stored and managed. By developing this system, we hope to alleviate the problems related to livestock disease control.
A Hierarchical Underwater Acoustic Sensor Network Architecture Utilizing AUVs` Optimal Trajectory Movements
Nguyen, Thi Tham ; Yoon, Seokhoon ;
The Journal of Korean Institute of Communications and Information Sciences, volume 37C, issue 12, 2012, Pages 1328~1336
DOI : 10.7840/kics.2012.37C.12.1328
Compared to terrestrial RF communications, underwater acoustic communications have several limitations such as limited bandwidth, high level of fading effects, and a large underwater propagation delay. In this paper, in order to tackle those limitations of underwater communications and to make it possible to form a large underwater monitoring systems, we propose a hierarchical underwater network architecture, which consists of underwater sensors, clusterheads, underwater/surface sink nodes, autonomous underwater vehicles (AUVs). In the proposed architecture, for the maximization of packet delivery ratio and the minimization of underwater sensor`s energy consumption, a hybrid routing protocol is used. More specifically, cluster members use Tree based routing to transmit sensing data to clusterheads. AUVs on optimal trajectory movements collect the aggregated data from clusterhead and finally forward the data to the sink node. Also, in order to minimize the maximum travel distance of AUVs, an Integer Linear Programming based algorithm is employed. Performance analysis through simulations shows that the proposed architecture can achieve a higher data delivery ratio and lower energy consumption than existing routing schemes such as gradient based routing and geographical forwarding. Start after striking space key 2 times.