• Proceedings of the Korean Information Science Society Conference
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• 2002.04a
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• pp.343-345
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• 2002

기존 능동 네트워크 기술 분야에서 능동 네트워크 라우팅은 정석인 토폴로지 구성을 가정하고 있다. 그렇지만 IP 라우팅 영역에서와 같이 능동 네트워크 영역에서도 능동 패킷의 네트러크 상태에 따른 동적인 라우팅이 이루어져야 한다. 현재까지 SLRP와 TCOM500 PLA 프로젝트와 같은 프로토콜들이 제시되어 있지만, 두 프로토콜 모두 정적으로 구성되어 있는 토폴로지를 기반으로 하기 때문에 완전하게 동적인 프로토콜은 아니다. 본 논문에서는 좀더 동적이고 기존 프로토콜과의 호환성을 갖춘 능동 네트워크 라우팅 프로토콜로서 AOSPF를 제안한다. AOSPF는 능동 네트워크 라우팅을 위해 새로운 LSA를 추가함으로서 OSPF를 확장한 것이다. 새로운 LSA는 해당 라우터가 능동 라우터임을 명시하며, 이를 위해 LSA 패킷내의 OPTION 필드를 가운데 사용되고 있지 않은 비트 가운데 하나를 능등 라우터 명시 비트로 사용한다. 이러한 개념은 멀티캐스트를 위해 OSPF를 확장한 것으로부터 가져왔다. 본 논문에서는 AOSPF의 동작 과정과 AOSPF를 통해 구성된 능동 네트워클 토폴로지 정보를 기반으로 하는 능동 패킷의 전단 방법에 대해 기술한다.

• Proceedings of the Korea Multimedia Society Conference
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• 2002.05d
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• pp.995-1000
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• 2002

능동 네트워크는 기존의 네트워크 노드(교환기)의 역할인 데이터 교환과 전송의 기능에서 프로그램의 실행 기능이 추가된 노드를 갖춘 네트워크를 말한다. 능동 노드는 프로그래밍 언어의 선택에 따라 운영환경에 많은 영향을 끼치는 부분이다. 본 논문에서는 안전한 능동 노드 기술 언어의 요구사항과 운영환경에 관해 연구하고, 이를 바탕으로 최적의 능동노드 기술용 프로그래밍 언어의 모델에 능동 네트워크 언어의 표준으로서 가장 유력한 자바 언어 모델을 제안하고자 한다.

• Journal of Korea Multimedia Society
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• v.6 no.7
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• pp.1245-1255
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• 2003

Request for network becomes complicated gradually and network traffic is increasing, To overcome this situation, the structure of network node should be changed to accept new service quickly and economically by executing program code in node itself. Active Network's research can use net resources more properly because of executing program within node itself. In this paper, we design a programming language, namely ASL, for Active Sensor to describe function and behavior of active sensor. We also design and implement the interpreter for proposed ASL.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.12 no.2
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• pp.135-145
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• 2002

Active networks represent a new approach to network architecture. Nodes(routers, switches, etc.) can perform computations on user data, while packets can carry programs to be executed on nodes and potentially change the state of them. While active networks provide a flexible network iufrastructure, they are more complex than traditional networks and raise considerable security problems. Nodes are Public resources and are essential to the proper and contract running of many important systems. Therefore, security requirements placed upon the computational environment where the code of packets will be executed must be very strict. Trends of research for active network security are divided into two categories: securing active nodes and securing active packets. For example, packet authentication or monitoring/control methods are for securing active node, but some cryptographic techniques are for the latter. This paper is for transferring active packets securely between active nodes. We propose a new method that can transfer active packets to neighboring active nodes securely, and execute executable code included in those packets in each active node. We use both public key cryptosystem and symmetric key cryptosystem in our scheme

• Proceedings of the Korean Information Science Society Conference
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• 2004.04b
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• pp.838-840
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• 2004

능동 네트워크 (active network) 는 각 네트워크 요소들이 단순한 데이터 전달 뿐 아니라 데이터를 다루는 프로그램을 탑재/수행함으로써 네트워크 상에서 부가적인 작업을 가능하게 한다 본 논문에서는 자료 흐름 모델에 기반 한 능동 네트워크 언어를 제안하고 Java 환경에서 수행을 가능하게 하는 변환기와 보조 API를 제안하였다.

• Proceedings of the Korean Information Science Society Conference
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• 2002.04a
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• pp.340-342
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• 2002

능동 네트워크 기술은 차세대 프로토콜 개발 방식으로 등장한 기술로서, 현재 여러 연구소와 대학에서 능동 노드의 구조와 능동 패킷의 형식을 제안하고 있다. 그렇지만, 현재까지 제안된 능동 노드의 구조와 능동 패킷의 형식을 살펴보면, 능동 패킷의 특성을 고려하지 않고 있다. 최근 인터넷은 사용자들의 요구사항을 보장하기 위해 패킷의 특성을 구분하고, QoS를 보장하기 위해 많은 연구가 진행되고 있으며, 능동 네트워크 영역에서도 이러한 기술이 적용되어야 한다. 본 논문에서는 이를 위해 능동 패킷의 특성에 따라 패킷의 형태를 네가지로 구분하고, 라우팅 방법을 세가지 형태로 구분하여 반영시킨 능동노드의 구조와 능동 패킷의 형식을 제안한다.

• Journal of Korea Multimedia Society
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• v.7 no.1
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• pp.113-125
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• 2004

Active networks aim to provide a software framework that enables active network applications to customize the processing their communications. Active security component architecture focuses on the support of reuse system by active security component. The architecture is standard layer to acquire, understand, and assemble component, and it has to support a guideline for component identification, search and customization. In this paper we present the active security architecture as a standard model of discrete active network solution, and we propose the method for component classification and specification.

• Journal of KIISE:Information Networking
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• v.30 no.1
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• pp.126-133
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• 2003

The existing active routing Protocols assume that the active network topology is static or pre-configured. However a dynamic mechanism to route an active Packet according to the network condition is required due to the dynamic characteristic of the active network. As active routing protocols, SLRP and TCOM500 PLAN project have been proposed, but since both of them are based on the assumption of the static topology we can not say that they are dynamic routing protocols in their entirety. Therefore, in this paper, we propose a new active network routing protocol, called AOSPF (Active Open Shortest Path First), which is compatible with the existing IP routing protocol. AOSPF is an extension of OSPF by adding a new LSA (Link State Advertisement) to allow the active network routing. The newly introduced LSA is used to specify whether the corresponding router is an active router or not. and one bit in the OPTION field of an LSA packet is used as the active router indication bit. This way of extending OSPF is similar to the scheme used in the extension of OSPF for multicast, i.e., MOSPF. In this paper, we will present the operation of AOSPF and the way how an active packet is forwarded based on the active network topology information constructed by AOSPF.

• Journal of KIISE:Information Networking
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• v.29 no.6
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• pp.712-721
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• 2002

The active network is a new networking approach to allow new protocols to be developed easily by solving the limitation of the existing protocol development procedure and the long protocol standardization process. So far many research institutes and universities have proposed active node architectures and active packet formats, but still there are some problems needed to be solved. One of them is the active packet format and the routing approach which consider the requirements of various active applications. Therefore, in this paper, we figure cut the requirements of various active applications and design four types of active packet formats that reflect these requirements and propose routing schemes appropriate for these characteristics. Also we propose an active node architecture which reflect these requirements.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.22 no.9
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• pp.1250-1256
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• 2018

Recently, wireless networks are becoming an important infrastructure for the critical large-scale applications such as cyber-physical systems and next generation industrial automations. However, the fundamental performance uncertainty of wireless networks may incur the serious instability problem of the overall systems. This paper proposes the proactive network optimizer to guarantee the application demands without any real-time link monitoring information of the networks. In particularly, the proposed proactive optimizer is the cross-layer approach to jointly optimize the routing path and traffic distribution in order to guarantee the performance demand within a maximum k number of link faults. Through the simulations, the proposed proactive network optimizer provides better robustness than the traditional existing reactive networks. Furthermore, the proactive network does not expose to the major weakness of the reactive networks such as the performance degradation due to the erroneous link monitoring information and the network reconfiguration cost.