• Journal of the Korea Institute of Information and Communication Engineering
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• v.17 no.7
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• pp.1602-1608
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• 2013

PoC (Push-to-Talk over Cellular) provides one-to-one as well as one-to-many communications with VoIP technology based on SIP over cellular networks. According to above property, PoC is considered as perscrptive technology for public protection for disaster relief networks. For this networks, group communication is the essential function. However, since current standardization process takes into general scenarios account without any consideration for mentioned networks, it have some problems in the point of adaptability. To solve above problem, in this paper, we propose how to reduce the overhead on the PoC server to reduce the transmission delay. Simulation results are shown to evaluate the improved performance.

• Electronics and Telecommunications Trends
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• v.26 no.3
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• pp.50-60
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• 2011

사회와 산업이 발전함에 따라 국가적 재난재해는 다양성과 복잡성이 날로 증가하고 있고 그 피해규모 또한 대규모화되고 있는 추세이다. 최근 공공안전에 대한 국민들의 기대수준이 높아짐에 따라 고도화된 국가공공 재난안전무선통신 인프라의 필요성이 국내외적으로 대두되고 있으며 국가의 주도적인 역할이 요구되고 있는 상황이다. 본 고에서는 국내외 재난안전무선통신망의 구축 현황을 살펴보고, 우리나라의 차세대 재난안전무선통신망의 주요 요구기능과 그 요구기능에 적합할 것으로 예상되는 재난안전무선통신을 위한 후보 기술들을 알아보고자 한다.

• Journal of Advanced Navigation Technology
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• v.12 no.6
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• pp.611-618
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• 2008

The development of information society together with information telecommunication's influence on the human society is a ripple effect and getting wider. Among those ripple effects the disaster prevention is in the public eye in the present day. On the way to the ubiquitous society the main techniques to be concerned in ubiquitous sensor networks are the field of damage of storm and flood, safety facilities, traffic safety, industrial safety, energy safety, fire fighting, specific safety of radioactivity escape incident, environmental pollution, sea pollution, mountain and forrest disaster so on. In this paper the USN technique based on the disaster prevention communication technology service and its requirement technology and application are studied.