http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : ( Amine Dhraief ) (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
-
An Experimental Investigation of the Impact of Mobile IPv6 Handover on Transport Protocols
Amine Dhraief,Abdelfettah Belghith 한국산학기술학회 2012 SmartCR Vol.2 No.1
Mobile IPv6 is the current IETF standard for end host mobility management in the Internet. In order to provide a transparent location management, Mobile IPv6 operates in two different modes. In the first mode, mobile node incoming packets are tunneled to the node current location via the home network. In the second mode, traffic is exchanged directly between the mobile node and its communicating peers. In this paper, we evaluate the performance of these two modes on a real test bed. We first analytically model the Mobile IPv6 handover. Afterwards, we empirically assess its impact on transport protocols in general and more specifically on TCP CUBIC, the default TCP implementation in the current Linux kernel since version 2.6.19. We demonstrate that this TCP implementation induces high handover latency as it was not designed to be deployed in a dynamic environment.
-
A GPS-less Framework for Localization and Coverage Maintenance in Wireless Sensor Networks
( Imen Mahjri ),( Amine Dhraief ),( Abdelfettah Belghith ),( Khalil Drira ),( Hassan Mathkour ) 한국인터넷정보학회 2016 KSII Transactions on Internet and Information Syst Vol.10 No.1
Sensing coverage is a fundamental issue for Wireless Sensor Networks (WSNs). Several coverage configuration protocols have been developed; most of them presume the availability of precise knowledge about each node location via GPS receivers. However, equipping each sensor node with a GPS is very expensive in terms of both energy and cost. On the other hand, several GPS-less localization algorithms that aim at obtaining nodes locations with a low cost have been proposed. Although their deep correlation, sensing coverage and localization have long been treated separately. In this paper, we analyze, design and evaluate a novel integrated framework providing both localization and coverage guarantees for WSNs. We integrate the well-known Coverage Configuration Protocol CCP with an improved version of the localization algorithm AT-Dist. We enhanced the original specification of AT-Dist in order to guarantee the necessary localization accuracy required by CCP. In our proposed framework, a few number of nodes are assumed to know their exact positions and dynamically vary their transmission ranges. The remaining sensors positions are derived, as accurately as possible, using this little initial location information. All nodes positions (exact and derived) are then used as an input for the coverage module. Extensive simulation results show that, even with a very low anchor density, our proposal reaches the same performance and efficiency as the ideal CCP based on complete and precise knowledge of sensors coordinates.
ScienceON연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
