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Hwang, Taemin;Nam, Yujin;Jeong, Min-A;So, Jaewoo
- The Journal of Korean Institute of Communications and Information Sciences
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- v.40 no.7
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- pp.1424-1432
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- 2015
As the wireless communication technologies are being studied for application to maritime communication networks in a fusion of marine industries and IT technology, interference coordination techniques have been studied in the maritime heterogeneous networks. In this paper, we develop a simulator for measuring, verifying and evaluating performance of a maritime heterogeneous network. Unlike other previous simulators, the developed simulator applies enhanced inter-cell interference coordination (eICIC) that are being introduced in the 3GPP Release 10 for mitigating the cross-tier interference between ships. Furthermore, we investigate the effects of almost blank subframes (ABS) and cell range expansion (CRE) on the throughput of small cells in maritime heterogeneous networks by using the developed simulator.
https://doi.org/10.7840/kics.2015.40.7.1424 인용 PDF KSCI

Park, Duk-Kyu;Lee, Sang-Yun;Yoon, Byungsik;Kim, Yong-Kyu
- Journal of the Korean Society for Railway
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- v.16 no.6
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- pp.510-518
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- 2013
These days, interest in radio networks for railways has increased both at home and abroad. In response to this trend, not only the existing radio networks which focus on railway control signals but also the next-generation integrated radio network that can send videos and manage mass storage data are actively being investigated. This paper proposes wireless communication methods to establish integrated radio networks for railways. The paper further suggests a candidate frequency band that could be allocated as the frequency band for railways among the frequency bands currently used in Korea. Based on this paper, we can expect that the domestic railroad will operate more efficiently and that security and convenience of the railroad will reach a superior level. In addition, the Korean integrated radio networks for railways, which cope with the changes in the global technology market, will be established.
https://doi.org/10.7782/JKSR.2013.16.6.510 인용 PDF KSCI

Park, Seong-Soo;Lee, Jong-Hyouk;Chung, Tai-Myoung
- The KIPS Transactions:PartC
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- v.16C no.2
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- pp.143-150
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- 2009
In trust-based networks, it is very important how to decide a node is trustworthy when one node performs communications with other node. In current networks based on trust, a node creates a new trust value from observation and then establishes an intercommunication path through the process of evaluating a targeted communication node. In our paper, we propose four trust models in which a new node enters a cluster and finds a target node to create a communication in ad-hoc networks. The proposed models have been classified according to the existence of reputation server and the trust evaluation functions. Through the proposed model, we found that new node finds target node more quickly in which there exists a reputation server in the cluster and considers neighbor node's recommendation as well as own experience information when calculates trust values. As our performance analysis, we focus the communication delay time to generate a final trust value for each trust model.
https://doi.org/10.3745/KIPSTC.2009.16-C.2.143 인용 PDF KSCI

Keewon Kim;Jonghyun Kim;Kyungmin Park;Tae-Keun Park
- Journal of the Korea Society of Computer and Information
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- v.28 no.12
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- pp.105-114
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- 2023
In this paper, we propose a deployment and operation scheme of UxNB network toward mobile IAB. By operating a UxNB network based on SDN(Software Defined Network), UxNBs are deployed in areas where mobile communication services are desired. After deploying UxNB in the service area, IAB can be set up to perform mobile communication services. For this purpose, this paper first proposes a UxNB Network Controller consisting of a UAV Controller and an SDN Controller, and proposes the necessary functions. Next, we present a scenario in which a UxNB network can be deployed and operated in detail step by step. We also discuss the location of the UxNB network controller, how to deliver control commands from the UAV controller to the UxNB, how to apply IAB for UxNB networks, optimization of UxNB networks, RLF(radio link failure) recovery in UxNB networks, and future research on security in UxNB networks. It is expected that the proposed UxNB Network Controller architecture and UxNB network deployment and operation will enable seamless integration of UxNB networks into Mobile IAB.
https://doi.org/10.9708/jksci.2023.28.12.105 인용 PDF HTML