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NTIS 바로가기한국광학회지 = Korean journal of optics and photonics, v.24 no.6, 2013년, pp.297 - 310
With the explosive growth of internet data traffic due to the FTTH penetration, prevalence of smart devices and cloud network service, the demand for higher bandwidth is ever increasing with the pace of more than 40% annual growth. To accommodate ultra high bandwidth traffic, optical components in e...
핵심어 | 질문 | 논문에서 추출한 답변 |
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파장분할방식 수동가입자망은 어떠한 단점이 존재하는가? | WDM-PON은 각 가입자별로 별개의 파장으로 통신하기 때문에 실제로는 점대점 방식의 통신을 취하게 되어 가입자가 광송수신기가 가지는 최대 대역폭의 사용이 가능하며 보안 측면에서 우수한 장점이 있다. 하지만 각 가입자별로 다른 종류의 파장을 가진 광원을 준비해야 하므로 비용이 상승하는 단점이 있다. 현재 비용적인 이점으로 대부분의 광가입자망이 TDM-PON 방식으로 구성되어 있다. | |
광가입자망의 가장 큰 특징은 무엇인가? | 광가입자망의 가장 큰 특징은 앞서 언급한 바와 같이 기존 통신망 구축과는 비교할 수 없는 대규모 광통신 부품 수요에 있다. 또한 가입자망은 주로 전화국과 가입자간의 연결로 점대다점(point-to-multi point) 연결 성격을 가지고 있다. | |
수동가입자망은 어떠한 방식을 이용하는가? | 따라서 광가입자망의 구성방식은 이러한 상황을 반영하여 대부분 수동가입자망(PON: Passive Optical Network)으로 구성되고 있다. 수동가입자망이란 전화국에서 가입자 근처까지는 단일 광섬유를 활용하고 원격지(Remote node)에서 각 가입자로는 수동분배기를 이용하여 분기한 뒤 개별 광섬유를 통해 전달되는 방식을 취한다. 이로 인해 수동가입자망은 광섬유의 효율적 사용은 물론 원격지에 전기를 필요로 하지 않기 때문에 유지 비용이 적게 드는 장점을 가지고 있다. |
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