한국정보과학회논문지:정보통신 (Journal of KIISE:Information Networking)

한국정보과학회 (Korean Institute of Information Scientists and Engineers)
권호 표지

IEEE 802.11 무선 네트워크에서 GPS와 SNR을 이용한 핸드오버 메커니즘

A Handover Mechanism for IEEE 802.11 Wireless Networks using GPS and SNR

  • 발행 : 2009.06.15
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초록

본 논문에서는 IEEE 802.11 링크 계층의 핸드오버 성능을 증가시킬 수 있는 메커니즘을 제시한다. 본 메커니즘은 GPS에 기반한 AP 맵을 참조하여 스캐닝할 채널 수를 줄인다. 또한 모바일 노드와 주변 AP들의 SNR값들을 모니터링 함으로써 주어진 경계 값보다 높은 SNR값을 유지하도록 핸드오버한다. 실험 결과, 본 메커니즘은 6.7%의 통신 단절률을 가지며 평균 16.8 dB의 SNR값을 가진다. 이는 기존의 MadWifi가 사용하는 핸드오버 방식에 비해서는 4.1% 낮은 통신 단절률이며, 26% 높은 평균 SNR값이다.

In this paper, we propose a mechanism for increasing the handover performance of the IEEE 802.11 link layer. The mechanism reduces the number of scanning channels by referencing an AP map based on GPS. Also, by monitoring the SNRs of the mobile node and neighbor APs, it enables the handover to maintain a higher SNR than a given threshold. The experimental results establish that it has a disconnection ratio of 6.7% and an average SNR of 16.8 dB. It is 4.1% lower disconnection ratio and 26% higher SNR than the mechanism used by MadWifi.

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참고문헌

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