郑州轻工业学院学报(自然科学版)
鄭州輕工業學院學報(自然科學版)
정주경공업학원학보(자연과학판)
JOURNAL OF ZHENGZHOU INSTITUTE OF LIGHT INDUSTRY(NATURAL SCIENCE)
2015年
2期
60-66
,共7页
无线局域网%IEEE 802. 11%P 概率接入控制机制%退避算法
無線跼域網%IEEE 802. 11%P 概率接入控製機製%退避算法
무선국역망%IEEE 802. 11%P 개솔접입공제궤제%퇴피산법
WLAN%IEEE 802. 11%P-probability access control mechanism%backoff algorithm
基于 P BEB 算法,提出了一种改进的优先级退避算法。该算法通过概率 g 确定竞争窗口值,执行发送动作;若数据帧发送失败,根据时隙使用率设置翻倍竞争窗口值,发送成功后,以概率 g 设置窗口值,即依据网络当前的拥塞程度来调整竞争窗口值。利用 Infrastructure 场景对优化后的算法进行验证,结果表明该方法可有效提高吞吐量,并且可以维持较小的接入时延,降低系统的丢包量,较好地改善无线局域网的性能。
基于 P BEB 算法,提齣瞭一種改進的優先級退避算法。該算法通過概率 g 確定競爭窗口值,執行髮送動作;若數據幀髮送失敗,根據時隙使用率設置翻倍競爭窗口值,髮送成功後,以概率 g 設置窗口值,即依據網絡噹前的擁塞程度來調整競爭窗口值。利用 Infrastructure 場景對優化後的算法進行驗證,結果錶明該方法可有效提高吞吐量,併且可以維持較小的接入時延,降低繫統的丟包量,較好地改善無線跼域網的性能。
기우 P BEB 산법,제출료일충개진적우선급퇴피산법。해산법통과개솔 g 학정경쟁창구치,집행발송동작;약수거정발송실패,근거시극사용솔설치번배경쟁창구치,발송성공후,이개솔 g 설치창구치,즉의거망락당전적옹새정도래조정경쟁창구치。이용 Infrastructure 장경대우화후적산법진행험증,결과표명해방법가유효제고탄토량,병차가이유지교소적접입시연,강저계통적주포량,교호지개선무선국역망적성능。
An improved priority backoff algorithm was proposed based on the P BEB algorithm. The algo-rithm determined the contention window value by the probability g,and then executed the send action. If the data frames sent failure,the competition window value was set double according to the time slot utiliza-tion rate,with probability g settings window value after the success of the send,namely according to the adjustment of the current value of the contention window. The optimized algorithm was verified using the Infrastructure scene,the results showed that this method effectively improved the throughput,and could maintain the small access delay,reduce packet loss amount of system,and improve the performance of wireless local area network.