• Journal of KIISE:Information Networking
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• v.37 no.1
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• pp.1-7
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• 2010

Network Centric Warfare(NCW) is becoming a prominent concept in the current trend of warfare. To support high quality communication between strategic/tactical units in the concept of NCW, Tactical Airborne Networks are likely to be constructed in the near future to take part in the NCW. In these Tactical Airborne Networks with dynamic topology variations due to very high mobility of participants nodes, more efficient and reliable neighbor discovery protocols are needed. This paper presents the adaptive HELLO message scheduling algorithm for Tactical Airborne Network using directional antennas. The purposed algorithm can reduce the overhead of periodic HELLO message transfer, while guaranteeing successful data transmission. We concluded a mathematical analysis and simulation studies using Qualnet 4.5 for evaluation the performance and efficiency of the proposed scheme.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.37C no.11
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• pp.1104-1111
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• 2012

Airborne tactical networks is used to air-to-air or air-to-ground operation and have a large propagation delay. All nodes share the data by using TDMA-based broadcasting. In airborne tactical networks, each time slot needs the guard time to ensure the broadcasting because the collisions occur due to the large propagation delay. However, the channel utilization of the networks can be greatly degraded due to the waste of guard time. In this paper, we propose Inter-Transmitter Distance-Based TDMA (ID-TDMA) scheme which ensures the broadcasting while improving the channel utilization by reducing the guard time with the inter-transmitter distance information. The proposed scheme shows the effectiveness through the performance evaluation.

• Information and Communications Magazine
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• v.24 no.10
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• pp.34-43
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• 2007

해양은 육지, 공중과 같이 매우 중요한 국방전술 대상으로 수중 통신은 물론 수중과 지상을 연결하는 네트워킹 기술이 요구된다. 본 고에서는 해양에서 국방전술통신에 도입하기 위한 수중 센서 네트워크 시스템 기술에 대해 소개하며 이를 위해 해양 환경 분석과 더불어 해양에 알맞은 수중 센서 네트워크 시스템 모델을 제시하고 모델 각 구성요소의 기능에 대해 소개한다. 또한, 각 구성요소 기술 개발에 필요한 통신 프로토콜 계층 별 요구사항과 필요 연구를 소개하고 국내외 기술개발 동향에 대해 살펴본다.

• Journal of Convergence for Information Technology
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• v.11 no.4
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• pp.26-34
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• 2021

In the era of the Fourth Industrial Revolution, the future battlefield will carry out multi-area operations with hyper-connected, high-speed and mobile systems. In order to prepare for changes in the future, the Korean military intends to develop various weapons systems and form a multi-layer tactical network to support On The Move communication. However, current tactical networks are limited in support of On The Move communications. In other words, the operation of multi-beam antennas is necessary to efficiently construct a multi-layer tactical network in future warfare. Therefore, in this paper, we look at the need for multi-beam antennas through the operational scenario of a multi-layer tactical network. In addition, based on development consideration factors, features of rotary-wing and fixed-wing aircraft, we present the location and operation of airborne relay drone installations of multi-beam antennas.

• Journal of Convergence for Information Technology
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• v.11 no.1
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• pp.12-19
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• 2021

For strengthening the national defense, the function of tactical network is essential. tactics and strategies in wartime situations are based on numerous information. Therefore, various reconnaissance devices and resources are used to collect a huge amount of information, and they transmit the information through tactical networks. In tactical networks that which use contention based channel access scheme, high-speed nodes such as recon aircraft may have performance degradation problems due to unnecessary channel occupation. In this paper, we propose a learning-backoff method, which empirically learns the size of the contention window to determine channel access time. The proposed method shows that the network throughput can be increased up to 25% as the number of high-speed mobility nodes are increases.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.42 no.1
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• pp.172-180
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• 2017

Korean army has been trying to construct a future tactical network in collaboration with TICN at the ground level and the next-generation military satellite system in the space level. However, due to the low bandwidth and high operational cost, the satellite system has the limitation to exchange all kind of tactical information through it. To overcome the limitation, there have been several researches to construct airborne networks. In this paper, we propose an effective interworking architecture and operation scheme between terrestrial tactical networks and aerial relay networks to counteract against the communication breaks of terrestrial terminals. And, we also propose a way to analyze its effectiveness. The experimental results show that the interworking of aerial relay networks can manage the failure situations in terrestrial tactical networks very effectively.

• 한국ITS학회:학술대회논문집
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• 2008.11a
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• pp.118-121
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• 2008

본 연구에서는 정보통신기술을 활용한 미래전 개념인 네트워크 중심전 (NCW: Network Centric Warfare) 수행에 있어서 세계적으로 가장 널리 쓰이고 있는 Link-16의 기술적 요소들을 물리계층, 데이터링크 계층, 응용계층(전술메시지교환) 측면에서 검토하고 작전 운용 측면에서 Link-16 만의 장점과 한계점을 도출해 보기로 한다. 특히, 군용 전술 네트워크인 Link-16의 경우 통신 보안 및 견고성에 시스템 설계상의 주안점이 주어지기 때문에 비록 낮은 전송속도이지만 Link-16의 전송용량의 적절한 분배와 활용 방안은 매우 중요한 문제이다. 본 연구에서는 Link-16의 타임슬롯 구조, NPG 개념, 멀티네팅 개념을 기반으로 주요 작전을 수행하는데 있어서 네트워크 참가요소 (지상 및 공중 플랫폼)에 효율적인 전송용량 배분을 하기 방안을 제시한다. 여기에 있어서 고려해야 할 요소들로는 불필요한 통신용량할당의 최소화, 네트워크 설계 과정의 간소화, 작전 목적에 대한 충분한 지원, 보안성 유지 등을 들 수 있다.

• The Journal of the Korea institute of electronic communication sciences
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• v.16 no.6
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• pp.1045-1052
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• 2021

Modern Warfare is transforming into a Network Centric Warfare(NCW) where surveillance systems, command control systems and strike systems are interconnected with advanced IT technologies to share battlefield situations. The South Korean military is using the various tactical data links(TDL) such as Link-K, Link-16, Link-11 and KVMF depending on each military's battlefield situation. Joint Tactical Data Link System(JTDLS) is a system thar shares tactical information in near-real time between army/navy/air joint forces and additionally establishes Link-22 in Link-K, Link-16 and KVMF. In this paper, we propose the Link-22 system structure, Link-22 message analysis and the interface structure between the tactical data link processor and Link-22 to apply Link-22 to the JTDLS.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.38B no.1
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• pp.34-45
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• 2013

Due to its self-configuring nature, the tactical mobile ad hoc network is used for communications between tactical units and the command and control center (CCC) in battlefields, where communication infrastructure is not available. However, when a tactical unit moves far away from the CCC or there are geographical constraints, the data link between two communicating nodes can be broken, which results in an invalid data route from the tactical units to CCC. In order to address this problem, in this paper we propose a hierarchical connectivity maintenance scheme, namely ADLCoM (Autonomous Data Link Connectivity Maintenance). In ADLCoM, each tactical unit has one or more GW (gateway), which checks the status of data links between tactical units. If there is a possibility of link breakage, GWs request ground or aerial unmanned vehicles to become a relay for the data link. The simulation results, based on tactical scenarios, show that the proposed scheme can significantly improve the network performance with respect to data delivery ratio.

• Proceedings of the Korean Information Science Society Conference
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• 2008.06a
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• pp.263-264
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• 2008