Buffer management optimization strategy for satellite ATM  

作　　者：Lu Rang Cao Zhigang 

机构地区：[1]State Key Laboratory on Microwave and Digital Communications, Dept. of Electronics Engineering, Tsinghua Univ., Beijing 100084, P. R. China

出　　处：《Journal of Systems Engineering and Electronics》2006年第1期19-23,共5页系统工程与电子技术（英文版）

基　　金：ThisprojeetwassupportedbytheNationalNaturalScienceFoundationofChina(60472027)

摘　　要：ECFD （erroneous cell tail drop）, a buffer management optimization strategy is suggested which can improve the utilization of buffer resources in satellite ATM （asynchronous transfer mode） networks. The strategy, in which erroneous cells caused by satellite channel and the following cells that belong to the same PDU （protocol data Unit） are discarded, concerns non-real-time data services that use higher layer protocol for retransmission. Based on EPD （early packet drop） policy, mathematical models are established with and without ECTD. The numerical results show that ECTD would optimize buffer management and improve effective throughput （goodput）, and the increment of goodput is relative to the CER （cell error ratio） and the PDU length. The higher their values are, the greater the increment. For example, when the average PDU length values are 30 and 90, the improvement of goodput are respectively about 4% and 10%.ECFD （erroneous cell tail drop）, a buffer management optimization strategy is suggested which can improve the utilization of buffer resources in satellite ATM （asynchronous transfer mode） networks. The strategy, in which erroneous cells caused by satellite channel and the following cells that belong to the same PDU （protocol data Unit） are discarded, concerns non-real-time data services that use higher layer protocol for retransmission. Based on EPD （early packet drop） policy, mathematical models are established with and without ECTD. The numerical results show that ECTD would optimize buffer management and improve effective throughput （goodput）, and the increment of goodput is relative to the CER （cell error ratio） and the PDU length. The higher their values are, the greater the increment. For example, when the average PDU length values are 30 and 90, the improvement of goodput are respectively about 4% and 10%.

关 键 词：asynchronous transfer mode satellite ATM buffer management early packet drop erroneous cell tail drop. 

分 类 号：TN91[电子电信—通信与信息系统]