计算机技术与发展
計算機技術與髮展
계산궤기술여발전
COMPUTER TECHNOLOGY AND DEVELOPMENT
2014年
5期
27-30
,共4页
拥塞控制%主动队列管理%ARED
擁塞控製%主動隊列管理%ARED
옹새공제%주동대렬관리%ARED
congestion control%active queue management%adaptive random early detection
随机早期检测(Random Early Detection,RED)是IETF推荐部署的主动队列管理(Active Queue Management,AQM)算法。 RED存在参数难以配置、无法适应动态网络环境的缺点。 ARED( Adaptive RED)是RED的自适应版本,通过平均队列长度来动态调整最大丢弃概率,从而达到稳定平均队列长度的目的,但是存在瞬时队列长度振荡的问题。文中研究了拥塞控制中的主动队列管理,对ARED算法进行了改进,优化丢弃概率计算函数,提出TTS-ARED算法,实现在动态网络环境下队列长度的稳定以及丢包率降低。 NS2的仿真结果表明,TTS-ARED算法显著地降低了丢包率,队列长度稳定性比ARED算法更优越。
隨機早期檢測(Random Early Detection,RED)是IETF推薦部署的主動隊列管理(Active Queue Management,AQM)算法。 RED存在參數難以配置、無法適應動態網絡環境的缺點。 ARED( Adaptive RED)是RED的自適應版本,通過平均隊列長度來動態調整最大丟棄概率,從而達到穩定平均隊列長度的目的,但是存在瞬時隊列長度振盪的問題。文中研究瞭擁塞控製中的主動隊列管理,對ARED算法進行瞭改進,優化丟棄概率計算函數,提齣TTS-ARED算法,實現在動態網絡環境下隊列長度的穩定以及丟包率降低。 NS2的倣真結果錶明,TTS-ARED算法顯著地降低瞭丟包率,隊列長度穩定性比ARED算法更優越。
수궤조기검측(Random Early Detection,RED)시IETF추천부서적주동대렬관리(Active Queue Management,AQM)산법。 RED존재삼수난이배치、무법괄응동태망락배경적결점。 ARED( Adaptive RED)시RED적자괄응판본,통과평균대렬장도래동태조정최대주기개솔,종이체도은정평균대렬장도적목적,단시존재순시대렬장도진탕적문제。문중연구료옹새공제중적주동대렬관리,대ARED산법진행료개진,우화주기개솔계산함수,제출TTS-ARED산법,실현재동태망락배경하대렬장도적은정이급주포솔강저。 NS2적방진결과표명,TTS-ARED산법현저지강저료주포솔,대렬장도은정성비ARED산법경우월。
Random Early Detection ( RED) is the Active Queue Management ( AQM) algorithm recommended by IETF. RED is difficult to configure its parameters,and can't adapt to dynamic network. ARED is an improved adaptive RED,by measuring average queue size to dynamically adjust maximum drop rate,achieving stable average queue size. But it may cause instantaneous queue size oscillation. It re-searched the active queue management in congestion control,and some improvements are made based on ARED algorithm. It optimized the calculation of dropping probability and a new algorithm TTS-ARED is proposed,low drop rate and the stable queue size in dynamic network are realized. The simulation results indicate that the drop rate can be decreased significantly by using TTS-ARED,and in the area of stabilizing queue size,TTS-ARED algorithm is superior to RED algorithm.
