• 대한전자공학회논문지SD
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• 제47권11호
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• pp.54-64
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• 2010

Reed-Solomon(RS) 코드는 강력한 에러 정정 능력으로 널리 사용된다. 최근 Sudan에 의해 Reed-Solomon 코드의 리스트 디코딩 알고리즘이 정립되었다. 리스트 디코더는 일반적인 디코더보다 더 큰 디코딩 반경을 가지며 하나 이상의 코드를 찾아낸다. 리스트 디코더는 복잡도와 latency가 매우 큰 Interpolation 과 Factorization 단계를 포함하므로 효율적인 하드웨어 설계가 필요하다. Factorization 은 latency가 매 단계마다 변하는 특성을 가져 복잡도가 높으며, 하드웨어 효율 저하의 문제가 발생한다. 본 논문에서는 하드웨어의 재사용을 높인 구조와 알고리즘의 효율적인 처리 스케쥴을 제안한다. 제안한 구조는 각 단계를 작은 단위의 R-MAC 유닛으로 나누어 매 단계마다 하드웨어를 재구성하여 처리함으로서 높은 하드웨어 효율과 효율적인 메모리 구조를 통해 복잡도가 낮은 순차처리를 적용하면서도 높은 처리량을 보이며, 여러 가지 어플리케이션에 적용가능하다. 제안한 구조는 동부 아남 $0.18{\mu}m$ 표준 셀 라이브러리를 사용하여 합성한 결과 최대 동작 주파수는 330MHz이다.

• 한국조경학회지
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• 제31권5호
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• pp.73-85
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• 2003

With more and more people paying attention to substantial democracy, participatory democracy is presented as a practical strategy and an index of Korean democracy. In this social and political atmosphere, participation in environmental planning and design is essential. Nonetheless, the true meaning of “participation” is not used properly because many people do not understand it correctly, The concept of social and political participation is “the action or attempt of ordinary members of society for affecting on the result of decision making.” Based on this concept, participation is accomplished through conventional means and as a form of mobilization in environmental planning and desist Most of the theories on public participation in landscape architecture are technical theories. Therefore, this paper proposes that planning and design of landscape architecture be understood as a communicative action that aims to enable stakeholders to reach a consensus through communication. This study offers the framework of theory to understand and practice planning and design of landscape architecture as a communicative action, after reviewing communicative action theory and communicative planning theory. Results suggest that communicative action theory should be accepted in landscape architecture to overcome the shortcomings of instrumental rationality -- the same way planning theory accepted this theory --and to join the culture of experts focusing on the artistic truth and the culture of life of the world. In addition, accepting communicative action theory enables the acquisition of the instrumental effect and social learning effect and the making of social capital. This study also suggested prerequisite for using the method. There should be change in the social institution and in individual action. In addition the method is composed of three steps: creating the atmosphere for communication; communicating, and; reaching a consensus among stakeholders. Finally, raising the possibility of applying the theory presented in this study requires the accumulation of know-how through trial and error.

• ETRI Journal
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• 제27권5호
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• pp.497-503
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• 2005

In this paper, we present a performance analysis for an MPEG-4 video codec based on the on-chip network communication architecture. The existing on-chip buses of system-on-a-chip (SoC) have some limitation on data traffic bandwidth since a large number of silicon IPs share the bus. An on-chip network is introduced to solve the problem of on-chip buses, in which the concept of a computer network is applied to the communication architecture of SoC. We compared the performance of the MPEG-4 video codec based on the on-chip network and Advanced Micro-controller Bus Architecture (AMBA) on-chip bus. Experimental results show that the performance of the MPEG-4 video codec based on the on-chip network is improved over 50% compared to the design based on a multi-layer AMBA bus.

• 한국멀티미디어학회논문지
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• 제15권12호
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• pp.1492-1498
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• 2012

One of the major issues in current internet architecture is that it was not designed to support the user mobility. In order to overcome this restriction, in this paper, we propose an identifier/locator separation architecture which contain the overlay mapping system to store the identifier-to-locator mapping record. In addition, we design the mobility management scheme base on Identifier/Locator separation above for Furture Internet architecture. We then devise the analysis model to evaluate the signaling cost of our scheme. By conducting the simulation. we show that our scheme can operate with lower signaling cost than other schemes.

• ETRI Journal
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• 제30권1호
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• pp.141-151
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• 2008

In this paper, we introduce a new verification platform with ARM- and DSP-based multiprocessor architecture. Its simple communication interface with a crossbar switch architecture is suitable for a heterogeneous multiprocessor platform. The platform is used to verify the function and performance of a DVB-T baseband receiver using hardware and software partitioning techniques with a seamless hardware/software co-verification tool. We present a dual-processor platform with an ARM926 and a Teak DSP, but it cannot satisfy the standard specification of EN 300 744 of DVB-T ETSI. Therefore, we propose a new multiprocessor strategy with an ARM926 and three Teak DSPs synchronized at 166 MHz to satisfy the required specification of DVB-T.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2005년도 추계종합학술대회
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• pp.47-52
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• 2005

In this paper we describe SLA metrics and software architecture for newly upcoming IP TV service. Firstly we show the general description for IP TV. This consists of brief description of IP TV, the general figure of configuration and elements of IP TV network and communication protocol stack of IP TV data transmission for deriving communication quality parameter. And we propose SLA metrics depending on quality measurement point. According to the measurement point the measurable SLA metrics are different. The total view of the IP TV SLA measurement and management architecture is shown. When the quality measurement point is the routers that consist of internet node, the IP media NMS is the quality collection system. And when the quality measurement point is the IP TV STB(Set-Top Box), the IP media collector and Quality Collection Server are the quality collection system. And we show the software block diagram of IP TV SLA processing system and the other related network management systems.

• International Journal of Internet, Broadcasting and Communication
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• 제12권3호
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• pp.189-195
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• 2020

Smart contract, one of the applications of blockchain, is expected to be used in various industries. However, there is risks of damages caused by attacks on vulnerabilities in smart contract codes. Tool support is essential to detect vulnerabilities, and as new vulnerabilities emerge and smart contract implementation languages increase, the tools must have extensibility for them. We propose a design model for extensible architecture of smart contract vulnerability detection tools that detect vulnerabilities in smart contract source codes. The proposed model is composed of design pattern-based structures that provides extensibility to easily support extension of detecting modules for new vulnerabilities and other implementation languages of smart contract. In the model, detecting modules are composed of independent module, so modifying or adding of module do not affect other modules and the system structure.

• 한국산업정보학회논문지
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• 제8권3호
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• pp.12-18
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• 2003

A web crawler is used widely in a variety of Internet applications such as search engines. As the Internet continues to grow, high performance web crawlers become more essential. Crawl scheduling which manages the allocation of web pages to each process for downloading documents is one of the important issues. In this paper, we identify issues that are important and challenging in the crawl scheduling. To address the issues, we propose a dynamic owl scheduling framework and subsequently a system architecture for a web crawler subject to the framework. This paper presents the architecture of a web crawler with dynamic scheduling support. The result of our preliminary performance evaluation made to the proposed crawler architecture is also presented.

• Journal of Information Processing Systems
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• 제2권3호
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• pp.170-177
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• 2006

Recently, RFID technology has attracted considerable attention in many industry fields. The RFID environment requires a standard architecture for the smooth exchange of data between heterogeneous networks. The architecture should offer an efficient standard environment, such as a communication environment based on Web Services, PKI or Kerberos-based security, and abstract business processes which could be used in the diverse domains. Therefore, in this paper, we propose an Enterprise Application Framework (EAF) which includes a standard communication protocol, security functions, and abstract level business processes. The suggested architecture is expected to provide a more secure and flexible security management in the dynamic RFID application environments, and is expected to provide an abstract business event for the development of business processes which could apply RFID technology to the existing systems.

• Smart Structures and Systems
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• 제17권5호
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• pp.743-751
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• 2016

An ongoing research project is devoted to the design and implementation of a satellite based asset tracking for supporting emergency management in crisis operations. Due to the emergency environment, one has to rely on a low power consumption wireless communication. Therefore, the communication hardware and software must be designed to match requirements, which can only be foreseen at the level of more or less likely scenarios. The latter aspect suggests a deep use of a simulator (instead of a real network of sensors) to cover extreme situations. The former power consumption remark suggests the use of a minimal computer (Raspberry Pi) as data collector.