DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | Lee, Man-Seop | - |
dc.contributor.advisor | 이만섭 | - |
dc.contributor.author | Jang, Joo-Ho | - |
dc.contributor.author | 장주호 | - |
dc.date.accessioned | 2011-12-28T02:46:05Z | - |
dc.date.available | 2011-12-28T02:46:05Z | - |
dc.date.issued | 2000 | - |
dc.identifier.uri | http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=391980&flag=dissertation | - |
dc.identifier.uri | http://hdl.handle.net/10203/54666 | - |
dc.description | 학위논문(석사) - 한국정보통신대학원대학교 : 공학부, 2000, [ vi, 62 p. ] | - |
dc.description.abstract | Wireless communications cannot know the state of medium. Thus, the retransmission strategy is the very important and medium access control is critical issue in wireless communications. CSMA/CA uses the well-known BEB algorithm for retransmission. Capture effect exists in the conventional BEB algorithm as a problem; the pre-emptive terminal has a higher likelihood to send its data successively. This induces the wasteful attempts and delays. Most of all, capture effect doesn``t give the multiple access fair opportunity. In this thesis, we propose a MCA-BEB(Modified Capture Avoidance Binary Exponential Backoff) algorithm to improve multiple access fairness for Optical Wireless LAN. Conventional backoff algorithm used for multiple access in wired and wireless LAN doesn``t give the fair opportunity to transmit data. MCA-BEB algorithm, which can improve the fairness of multiple access, uses "Attempt History Variable". AHV is the sum of last success attempts and each terminal``s attempting history with different weighting factors. This eliminates wasteful attempts and lowers the likelihood that pre-emptive terminal sends its data successively. Simulation results reveal that MCA-BEB algorithm improves fairness of multiple access 120% ~ 200% compared with conventional BEB algorithm. | eng |
dc.language | eng | - |
dc.publisher | 한국정보통신대학원대학교 | - |
dc.subject | Optical wireless LAN | - |
dc.subject | MCA-BEB | - |
dc.subject | Multiple access | - |
dc.subject | 공평성 | - |
dc.subject | 다중접속 | - |
dc.subject | 광무선랜 | - |
dc.subject | Fairness | - |
dc.title | MCA-BEB algorithm to improve fairness in multiple access for optical wireless LAN | - |
dc.title.alternative | 광 무선 랜에서 다중 접속 방식의 공평성을 향상시키기 위한 MCA-BEB알고리즘 연구 | - |
dc.type | Thesis(Master) | - |
dc.identifier.CNRN | 391980/225023 | - |
dc.description.department | 한국정보통신대학원대학교 : 공학부, | - |
dc.identifier.uid | 000983912 | - |
dc.contributor.localauthor | Lee, Man-Seop | - |
dc.contributor.localauthor | 이만섭 | - |
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