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In this paper, we propose a simple approach to using longer Hello messages to enhance network performance as an alternative of using link quality based routing metrics in MANET. In this proposal, routing nodes use longer routing messages to filter out the information from neighboring nodes about low-quality links. For doing so, we modified the structure of(More)
Channel response and noise in the in-home power-line channel are time varying, and show periodic patterns since electric devices, which are major noise sources, synchronously run with the ac-line cycle. Using the relatively stable channel characteristic of the power line, orthogonal frequency-division multiple access (OFDMA) schemes in power-line(More)
http://dx.doi.org/10.1016/j.comnet.2014.02.009 1389-1286/ 2014 Elsevier B.V. All rights reserved. ⇑ Corresponding author. Address: Seoul National University, Institute of New Media and Communications, 1 Gwanak-ro, Gwanak-gu, Seoul 151742, Republic of Korea. Tel.: +82 2 880 8434; fax: +82 2 880 8198. E-mail addresses: dhkang@netlab.snu.ac.kr (D. Kang),(More)
In this paper, we propose distributed Dynamic Route Change Algorithm (DRCA) which dynamically finds a better (i.e., shorter) route to the destination using hello message of neighbor in ad-hoc on-demand distance vector (AODV) routing protocol. We first change the hello message format of AODV so that it can contain the list of recently forwarded destination,(More)
In this paper, we propose a scalable broadcast protocol, named Subcarrier-level Tone-signal based Broadcast (ST-BCAST), that disseminates a packet over OFDM-based wireless multi-hop networks in an efficient and reliable manner. Exploiting collision-resilient tone-signals and receiver-triggered forwarding decision/cancellation, ST-BCAST achieves both high(More)
  • Daeho Kang, ∙Sung-Guk Yoon, ∙Saewoong Bahk
  • 2010
전력선 채널은 임펄스 잡음(impulsive noise)과 주기정상성 잡음(cyclo-stationary noise)의 독특한 잡음 특성과 함께 임피던스 부정합(impedance mismatching)에 의한 주파수 선택적 페이딩(frequency selective fading)의 특성 을 가지고 있다. 또한 전력선 채널은 토폴로지와 잡음 소스의 변화가 자주 일어나지 않기 때문에 무선 채널과 같은 짧 은 시간스케일의 채널 응답변화가 없다. 본 논문에서는 이러한 전력선 채널의 특성을 반영하여 OFDMA 방식을 도입 한 홈 네트워크에서 트리플 플레이 서비스(Triple Play Service)의 QoS를 보장하면서 채널 사용효율을 높이는(More)
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