• Proceedings of the Korean Information Science Society Conference
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• 2003.04d
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• pp.436-438
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• 2003

Ad hoc Network에서 효율적인 데이터 트래픽의 전송을 위하여 AODV 라우팅 알고리즘을 보안한 DM-AODV(Disjoint Multipath AODV)와 이를 활용하여 Qos율 높인 트래픽 분산 알고리즘인 TPA(Traffic Partitioning Algorithm)을 제안한다. 첫째, dynamic한 Ad hoc network환경에서 사용될 수 있는 DM-AODV을 사용하여 중복 노드가 없는 multipath들과 그 경로 각각의 최소 대역폭(bandwidth)을 구하고 둘째, 소스 노드에 들어오는 트래픽의 요구 대역폭과 TPA을 사용하여, 네트워크가 정상 일 때 전달 될 main path들과 네트워크 장애 시 할당 될 alternative path들에 들어오는 트래픽을 dynamic하게 분산시킴으로써 어플리케이션이 요구하는 높은 대역폭의 트래픽 수용 가능성을 높이고, 들어오는 트래픽의 안정적인 대역폭 보장과 속도의 향상, 폭주(congestion)의 감소 효과를 나타낸다. 또한 Main path에 장애 발생시, 미리 계산된 alternative Path에 트래픽을 전송함으로서 들어오는 패킷의 손실을 최소한으로 한다. 본 논문에서는 Ad hoc network에서의 QoS를 높이는 두 알고리즘을 소개하고, 동작 원리를 알아본다.

• Journal of the Korea Society of Computer and Information
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• v.12 no.6
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• pp.1-9
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• 2007

We propose a novel framework for distributed resource management. The framework has the following novel features. First, the resource management system is distributed using resource content information that is characterized by system properties. We argue that a distributed system based on resource content is sufficient to satisfy specific scheduling requests for Quality of Service(QoS) considering workload balance across a grid. Second, the distributed system constructs a hierarchical peer-to-peer network. This peered network provides an efficient message routing mechanism. The simulation results demonstrate that the proposed framework is proficient to satisfy QoS in distributed environment.

• Proceedings of the IEEK Conference
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• 2003.07a
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• pp.390-393
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• 2003

본 논문은 이스텔시스템즈와 한국전자통신연구원 (ETRI)이 공동개발한 QoS 기반의 10기가비트 이더넷 포트를 가지는 에지 스위치 시스템을 개발 하면서 적용된 분산된 스케일러블 이중화 IPC구조를 제안한다. 제안된 분산된 스케일러블 이중화 IPC구조는 라우팅 관련 로드를 분산하고 데이터 전달 능력을 향상시켜 라우팅의 성능을 개선시키는 것이다. 이 기능이 가능한 것은 라우팅 테이블 생성 및 관리의 분산을 위하여 전이중 방식의 고속이더넷 스위치를 이용한 이중화 IPC구조로 설계되었기 때문이다. 본 논문에서는 분산된 스케일러블 이중화 IPC구조에 대한 내용을 설명하고 그에대한 구현 방법을 설명한다. 제안된 분산된 스케일러블 이중화 IPC는, 차후 공동개발되는 160Gbps급의 10기가비트 이더넷 백본 스위치 시스템에도 적용함으로써 보다 신뢰성 있는 시스템의 설계 효과를 가져올 것으로 생각된다.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.28 no.1B
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• pp.71-79
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• 2003

As the traffic grows rapidly in the Internet, the QoS guarantee of the flows and the traffic engineering problems have become very important issues. MPLS has more advantages to solve the problems than existing IP routing because of its use of multiple paths between the source and destination pairs Particularly, the availability of Constraint-based Shortest Path First(CSPF) algorithm and explicit route in MPLS made the problem referred above to be solved efficiently. However, the CSPF algorithm has the characteristic of selecting the shortest path of all paths which meet the traffics' QoS constraints Therefore, even though there are alternative paths to route traffic, alternate QoS paths may not be found and best-effort traffic will be dropped during congestion period In this paper, we present the network resource optimization method related to the traffic engineering by using load balancing through routing in MPLS network.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.18 no.6
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• pp.1330-1336
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• 2014

QoS techniques and transmitted in real-time communication with the advancement of technology a variety of applications and services are available these days, mobile devices bogeuphwa LTE technology to the development of multimedia services with high quality can be realized. In order to satisfy this condition simply with a router with an increased bandwidth expansion by considering the increase in the routing table of the network scalability problems included. Burst traffic data to be distributed according to the environment is to be centered. To do this, the destination -based routing method to transmit the current paper -based (Source routing) routing settings are required. In this paper, published by the IETF, IP switching system based on standardized protocol Label Switching Multi-Protocol Label Switching (MPLS) network by using the existing Best Effect is difficult to guarantee QoS for multimedia transmission in MPLS network environment using optimized QoS guarantees to transmit the multicast.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.27 no.11C
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• pp.1055-1063
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• 2002

In this paper, we have studied path selection problem using multiple metric. Current Internet selects a path using only one metric. The path selected by one metric is a best-effort service that can satisfy one requirements. In order to satisfy a call with various Qualify-of-Service(QoS) requirements, the path must satisfy multiple constraints. In many cases, path selection is NP-complete. The proposed algorithm is widest-least cost routing algorithm that selects a path based on cost metric which is basically a delay metric influenced by the network status. The proposed algorithm is a multiple metric path selection algorithm that has traffic distribution ability to select shortest path when network load is light and move traffic to other alternate path when the link load is high. We have compared the results with other routing algorithms.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.19 no.8
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• pp.1780-1784
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• 2015

Traditional IP routing, see only the Destination Address When Forwarding Layer 3 routing and exchange information and Destination-Based Routing Lookup is required for all Hop. Thus, all routers Full Internet routing information, the route information of more than about 120,000 may require. Therefore, the router configuration, which can be dispersed in the environment, the traffic load is required in accordance with this congestion. In this study, a unique characteristic of the Internet in the environment of an existing network Best Effect for QoS guarantee and hardware high speed switching of large multimedia data transmitted using a Labeling for forwarding a packet environment configuration is required. Video Stream Broadcast Transport Labeling rather than in much of the higher performance of the multi-step policy to most of the Video Stream Packet deulim was fixed to Labeling Header Format proposes a method of applying an effective QoS policy to a more simplified policy.

• Proceedings of the Korea Contents Association Conference
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• 2003.05a
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• pp.361-367
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• 2003

Ad-hoc network is a multi-hop wireless network formed by a collection of mobile nodes without the aid of any establish infrastructure and this network can provide an extremely flexible method for establishing communications for fire, safety, rescue operations, battle field or other fields requiring rapidly deployable communications with survivable, efficient dynamic networking. Recently new expended mechanism is proposed as Ad-hoc relay system, so guarantee of QoS for multimedia applications is needed more and more. In this paper, we propose ARM based QoS Distribution Monitoring Mechanism to provide Quality of Service guarantees to multimedia application with MANET.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.35 no.5A
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• pp.417-422
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• 2010

In this paper, we propose a new routing scheme based on the multiple layer routing strategy. This algorithm can guarantee the required QoS while maximizing energy efficiency in wireless sensor networks. The principle contributions of this work are its simplicity, scalability and responsiveness to current network situations. Simulation results indicate the superior performance of our proposed algorithm, while other existing scheme cannot offer such an attractive performance balance.

• The KIPS Transactions:PartC
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• v.9C no.6
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• pp.935-944
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• 2002

It is the Mobile Ad Hoc Networks that constituted with serveral mobile node that can communicate with other mobile nodes. Until now, there were no routing protocols considering such as Multimediadata, VOD (Video On Demand), which is required of lots of bandwidth in Mobile Ad Hoc Network, io we are in the need of QoS (Quality of Service)routing protocol to transmit the data packets faster and more accurate. Also, there are an unidirectional links due to asymmetric property of mobile terminals or current wireless environments on practical mobile ad hoc networks. However, at present, the existing mobile ad hoc routing protocols are implemented to support only bidirectional links. In this paper, we propose the Advanced Routing routing protocol in order to implement a new routing protocol, which is fit to mobile ad hoc networks containing unidirectional links and to support QoS service. For the performance evaluation, we use NS-2 simulator of U.C. Berkeley. We could get not only increased received data rate and decreased average route discovery time, but also network load decreases with compared Best effort service.