• Journal of the Korea Institute of Military Science and Technology
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• v.24 no.6
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• pp.645-654
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• 2021

In this paper, we proposed a protocol to convert 2W telephone analog signals to Ethernet data in a private PSTN 2W tactical voice system. There are several kinds of operational problems in the tactical telephone network where 2W telephone copper lines are installed hundreds of meters away from the PBX in a headquarter site. The reason is that it is difficult to install and maintain the 2W telephone copper cable in severe operational fields and to meet safety and stability operational requirements of the telephone line under lighting and electromagnetic environments. In order to solve these challenging demands, we proposed an efficient method that the 2W analog interface signals between a private PBX system and a 2W telephone is converted to Ethernet messages using the optical Ethernet data communication network already deployed in the tactical weapon system. Thus, it is not necessary to install an additional optic cable for the ethernet telephone line and to maintain the private PSTN 2W telephone network. Also it provides safe and secure telecommunication operation under lightning and electromagnetic environments. This paper presents the conversion protocol from 2W telephone signals over Ethernet interface between PBX systems and 2W telephones, the mutual exchange protocol of ethernet messages between two converters, and the rule to process analog signal interface. Finally, we demonstrate that the proposed technique can provide a feasible solution in the tactical weapon system by analyzing its performance and experimental results such as the bandwidth of 2W telephone ethernet network and the transmission latency of voice signal, and the stability of optic ethernet voice network along with the ethernet data network.

• Journal of the Institute of Electronics Engineers of Korea TC
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• v.42 no.4 s.334
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• pp.7-14
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• 2005

Earlier researches have typically concentrated on discovering IP network topology, which implies that the connectivity of all Ethernet devices is ignored. But automatic discovery of Physical topology Plays a crucial role in enhancing the manageability of modem Metro Ethernet mesh networks due to the benefits of Ethernet services, including: Ease of use, Cost Effectiveness and flexibility. Because of proprietary solutions targeting specific product families and related algorithm which depends on Layer 2 forwarding table information it is impossible to discover physical topology in the Ethernet mesh networks. To cope with these shortcomings, in this paper we propose a novel and practical algorithmic solution that can discover accurate physical topology in the Ethernet mesh networks. Our algorithm divides the Ethernet mesh networks into bridged networks and host networks and those bridges located in boundary are named edge bridges. Our algorithm uses the standard spanning tree protocol MIB information for the bridged networks and uses the standard Layer 2 forwarding table MIB information for the host networks. As using the standard MIB information to discover physical topology we can offer interoperability guarantee in the Ethernet mesh networks composed of the various vendors' products.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2010.05a
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• pp.753-755
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• 2010

As demands increase for the Infotainment System, the Multimedia Networking technology for automobile, called MOST(Media Oriented Systems Transport), has been actively applied to the automobile industry, to meet the demands of the Infotainment System. The MOST25 network technology is being restrictively equipped with some of the car models but the problems withbandwidth and compatibility has arisen. In order to solve this, the MOST150 technology has been developed and further research is being carried out to applythe technology to the automobile industry. Thus, for the effective process of the Ethernet traffic in the realization of MOST150/Ethernet Gateway for automobile, we, in the research, shall analyse the Management Mapping method, including the MOST150's Isochronous channel, the MOST Ethernet Packet Channel, and etc. and study the efficient algorithm.

• JSTS:Journal of Semiconductor Technology and Science
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• v.4 no.4
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• pp.258-262
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• 2004

Storage over Ethernet (SoE) is a network storage architecture that allows direct attachment of existing ATA/ATAPI devices to Ethernet without a separate server. Unlike SAN, no server computer intervenes between the storage and the client hosts. We propose a SoE disk controller (SoEDC) amenable to low-cost, single-chip implementation that processes a simplified L3/L4 protocol and converts commands between Ethernet and ATA/ATAPI, while the rest of the complex tasks are performed by the remote hosts. Thanks to simple architecture and protocol, the SoEDC implemented on a single $4mm{\times}4mm$ chip in 0.18um CMOS technology achieves maximum throughput of 55MB/s on Gigabit Ethernet, which is comparable to that of a high-performance disk storage locally attached to a host computer.

• Proceedings of the Korean Information Science Society Conference
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• 2005.11a
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• pp.631-633
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• 2005

본 논문에서는 MEF(Metro Ethernet Forum) 기술 문서를 기반으로 메트로 이더넷 망을 위한 보호 기술을 소개하고 메트로 이더넷 망을 위한 링크 보호 알고리즘을 설계한다. 제안한 링크 보호 알고리즘은 각 서비스가 요구하는 링크 복구 시간(restoration time)을 고려하여 백업 경로를 미리 설정하는 방법과 장애가 발생한 이후에 우회 경로를 설정하는 방법을 사용한다. 백업 경로를 미리 설정함에 따라 자원의 이용률이 감소하므로 이를 해결하기 위하여 백업 경로 간 자원의 공유 방법을 도입하였으며, 서비스 특성에 따라 복구 경로에서 제한된 QoS를 제공하도록 하여 망의 가용성을 증가시일 수 있다.

• Proceedings of the IEEK Conference
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• 2005.11a
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• pp.237-240
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• 2005

We propose a fully converged Ethernet and TDM transport system. Developed Ethernet and TDM convergence system can support not only L2VPN service and premium multimedia service based on MPLS protocol but also TDM leased line service, simultaneously. Developed convergence system can provide high reliability for Ethernet data due to support protection and restoration function of circuit based networks. Evaluation for Ethernet and TDM path was successfully performed to show the typical application of the proposed system in the legacy networks.

• ETRI Journal
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• v.30 no.6
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• pp.874-876
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• 2008

Ethernet ring protection is a new technology introduced in ITU-T Recommendation G.8032, which utilizes the generic Ethernet MAC functions. We introduce an alternative enhanced protection switching scheme to suppress penalty in the switching transient, in which the Ethernet MAC filtering database (FDB) is actively and directly modified by information disseminated from the nodes adjacent to failure. The modified FDB at all nodes are guaranteed to be consistent to form a complete new ring network topology immediately. This scheme can reduce the capacity requirement of the G.8032 by several times. This proposed scheme can be also applied in IP protection rings.

• Proceedings of the Korea Information Processing Society Conference
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• 2003.05b
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• pp.1141-1144
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• 2003

Metro Ethernet 서비스는 기존의 라우터나 광전송장비를 거치지 않고 기가비트 이더넷으로 구성된 망을 이용해 스위치만으로 LAN과 같이 연결하는 서비스이다. 이 메트로 이더넷은 기존 SONET과는 달리 패킷교환 방식이므로 링크 대역폭의 효율적인 공유, 저렴한 칩과 장비, 사용자가 원하는 다양한 대역폭 할당, 피리고 인터넷 사용자의 증가와 원하는 대역폭의 증가로 등장하게 되었다. Metro Fiber Ethernet에 적용되는 기술로는 패킷분류화, 포트전송율 제어, QoS, 망복구 능련, 이더넷 VPN, 트래픽 엔지니어링 등이 있다. 본 논문에서는 이러한 기술들을 이용한 Metro Ethernet을 국방망에 적용함으로써 초고속 국방 통신망 구축을 제안하고자 한다.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2001.04a
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• pp.602-605
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• 2001

This paper focus on a method to use Ethernet Network for Industrial Communication Network. Ethernet use the CSMA/CD MAC(Medium Access Control) Protocol at the Data-Link Layer, Which isn't suit for Industrial Communication Network requiring Real-Time Communication, periodic data processing, critical data processing characteristics. In this paper we proposed the Virtual Polling Algorithm at the Application Layer will be solution of using the Ethernet Network for the Industrial Communication Network, Proposed Algorithm terminate the Collision in the network thus Delay Time is reduced and Real-Time Communication will be implemented.

• Proceedings of the Korean Information Science Society Conference
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• 2004.04a
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• pp.427-429
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• 2004

최근 광대역 멀티미디어 서비스에 대한 관심이 HD(High Density)방송의 시작과 함께 고조되고 있다. WPEG(Moving Picture Experts Group) HD 방송 채널을 수용하기 위해서 요구되는 방송대역은 20Mbps로 현재 가입자 망으로 한계를 가지고 있다. 궁극적인 해결 방안으로 FTTH(Fiber To The Hone) 광 가입자망이 논의되고 있다. 광 가입자 망의 유력한 방법중의 하나가 Gigabit Ethernet PON으로 IEEE(Institute of Electrical and Electronics) 802.3 EFH(Ethernet First Mile) AH Group을 중심으로 표준화 진행 중에 있다. IEEE 802.3 EFM AH Group에서는 가입자 망 장애에 대한 Protection 링크 이중화가 고려되고 있지 않아 본 논문에서 Gigabit Ethernet PON에서 링크 이중화 방법을 제시 하고자 한다.