• Journal of the Korea Institute of Information and Communication Engineering
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• v.7 no.6
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• pp.1161-1167
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• 2003

The nodes of Ad hoc network are made up of location registration for sending informations and a great number of packet transmissions to maintain routing route among the nodes. Under this environment, a huge number of traffics would be generated as mobility variable occurs more than in physical network. Hence, in this paper, focused on to study the relationship of nodes to analyze the extent of the traffic in order to control the traffics of the multi-hop in Ad hoc.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.11 no.3
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• pp.507-513
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• 2007

In this paper, we propose an efficient authentication protocol based on certificateless signature scheme, which does not need anyinfrastructure to deal with certification of public keys, among the vehicles in Vehicular Ad-hoc Networks. Moreover, due to the characteristicsof VANET nodes (i.e., vehicles) that is fast and movement, the proposed protocol introduces the concept of interval signing key to overcome efficiently the problem of certificate revocation in traditional Public Key Infrastructure(PKI).

• The Journal of the Korea Contents Association
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• v.9 no.8
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• pp.84-90
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• 2009

In this paper, the RFID-based ad-hoc network is presented for the efficient yard management of the container terminal. The loading and unloading work is performed through the ad-hoc communication between YT and GC, YT and TC within the yard without the control of the central server. That makes the efficient operation of the yard with real task correspondence. Using the location information of the RFID tag, we have proposed the routing protocol which is suitable for the yard environment of the container terminal. The performance evaluation has been carried out through the network simulator and gained an effective results.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.11 no.6
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• pp.31-39
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• 2011

For rapid formed the ad hoc wireless backbone network in disaster scene, It is necessary for real-time deployment scheme of wireless ad hoc relay devices by first responders without pre-planning. However, in order to realize this scheme, redundant deployment should be minimized, as well as optimal location of relay devices should be selected to expand communication coverage. Therefore, in this paper, we propose a new deployment scheme of relay devices to optimize communication coverage and then through simulations showed that improved performance of algorithm.

• The KIPS Transactions:PartC
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• v.9C no.5
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• pp.647-654
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• 2002

Ad-hoc networks consist of a set of mobile hosts that communicate using wireless links, without the use of other supporting communication facilities (such as base stations, etc.). Therefore, the topology of an Ad-hoc network frequently changes due to the movement of mobile host, which nay lead to sudden packet loss. Recently, the large amount of research has focused on the routing protocols needed in such an environment. In this paper, TCP Reno, Sack, and Tahoe versions are analysed using DSR protocol which is the representative On-Demand routing protocol in Ad-hoc wireless network. As the result of this simulation, we know that TCP Reno relatively has higher throughput than that of Sack and Tahoe, and TCP Reno has more stable performance than that of TCP Tahoe and Sack, regardless of the speed of mobile node and the size of topology.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.7 no.7
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• pp.1415-1420
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• 2003

The mobile radio networks can be divided into networks that has the base station or the infrastructures like AP(Access Point) and Ad Hoc network that hasn't any infrastructures. As there aren't any fixed infrastructures in Ad Hoc Networks, mobile nodes should transmit the data oかy among mobile nodes themselves. To supplement these weakpoints of the two networks, many studies about Ad Hon based on the 802.11 are in progress. In this thesis, we try to propose the efficiency of the suggested protocols by comparing and analyzing power saving protocols according to the Beacon intervals in multi hop Ad Hoc Networks based on IEEE 802.11.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.8 no.3
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• pp.25-33
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• 2008

In this paper, the transmit power minimization for Poisson distributed wireless ad-hoc relay networks in Rayleigh fading channels is considered. We investigate two power allocation methods one is a minimum power allocation (MPA) strategy and the other is an equal outage power allocation (EOPA) strategy. We analyze the total transmit power of two allocation methods under the given end-to-end outage probability constraint. Our results show that the MPA achieves more power saving than EOPA, and the power saving is more significant as the number of relay nodes increases.

• Proceedings of the IEEK Conference
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• 2004.06a
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• pp.119-122
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• 2004

This mobile oriented Ad-hoc network yet steps on development level, related issues and standardization are progressing. This paper presented ad-hoc network's overview and overall property, followed by routing scheme that must be setup for communication between each nodes. Among several routing scheme proposed for standardization, ZRP that is foaled by this paper, is hybrid type algorithm, and only includes advantages of others This paper presented running process and implementation method, result that is made from network simulation, shows analysis of each parameter values's change. Each parameters changed with many differences according to Zone radius and communication node's location from simualtion that was performed changing a number of nodes and a velocity of nodes.

• The Journal of Korea Institute of Information, Electronics, and Communication Technology
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• v.3 no.3
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• pp.62-72
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• 2010

As the applications for Mobile Ad-hoc NETworks (MANETs) have varied, performance analysis has become one of the main research areas. They commonly offer only simple radio propagation models that neglect obstacles of a propagation environment. The radio wave propagation model has a strong impact on the results of the simulation run. In this paper we present the new experimental results of the impacts of the various propagation models on MANETs' performance. Intensive simulations have been presented using the group mobility which models typical ad-hoc situations such as military movements or disaster recovery activities under the supervision of a group leader. Comparisons of conventional simple models with more complicated models, i.e., shadowing, Raleigh, and Ricean models, show that, in spite of the models' popularity, the free space and two-ray ground models are too optimistic in describing real ad-hoc group mobility situations.

• Proceedings of the Korea Information Processing Society Conference
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• 2003.05b
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• pp.1421-1424
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• 2003

무선 ad-hoc 네트워치 환경이란 유선망 하부구조를 갖지 않고 이동 호스트들만으로 구성되는 임시적 네트워크 환경을 말한다. 이러한 환경에서는 저대역폭 저전력, 잦은 오류 등의 특성에도 불구하고 이동 호스트들이 라우팅 기능을 수행해야 하므로, 보다 효율적인 라우팅 프로토콜이 요구된다. 본 논문에서는 무선 ad-hoc 네트워크 환경에서 이동 호스트들이 라우팅을 위한 주기적 라우팅 정보 방송을 하지 않도록 하면서 경로를 필요로 하는 호스트가 자발적으로 경로를 찾는 과정을 시작하여 하나 이상의 경로 응답을 밭고 그 중에서 하나의 경로를 선택하도록 하는 프로토콜을 제안한다. 경로 응답을 받은 나머지 경로는 예비경로가 되어, 라우팅 역할을 하는 이동 호스트들의 이동으로 데이터 전송 경로가 실패하는 경우에 빠른 경로 재 설정을 가능하게 한다. 이러한 기법은 데이터의 송수신 패턴이 지역성을 갖는 경우에 매우 유용한 기법이다.