ATM交换机中缓冲区分配策略的比较——VBR业务情况  

Comparison of Buffer Allocation Strategies in Shared Buffer ATM Switches under VBR Traffic

作　　者：余浩[1] 詹志强[1] 丁炜[1] 朱祥华[1] 

机构地区：[1]北京邮电大学培训中心

出　　处：《北京邮电大学学报》1999年第2期62-66,共5页Journal of Beijing University of Posts and Telecommunications

基　　金：国家"863计划"资助

摘　　要：为了能够最大限度地提高系统的利用率和系统的性能，采用计算机仿真的方法，在输入端口为ＶＢＲ业务流的情况下，从信元丢失率、平均时延两个方面对共享缓冲区型ＡＴＭ交换机中的缓冲区分配策略进行了比较．研究结果表明，ＶＢＲ业务下，共享缓冲区型ＡＴＭ交换机中缓冲区分配策略的性能与业务参数有很大关系．在一般情况下，采用共享的分配策略要优于没有共享的分配策略，而采取限制非公平占用措施的策略又要优于无限制非公平占用措施的策略．To enhance the performance and buffer usage of ATM switch, we compares the performance of buffer allocation strategies in shared buffer ATM switches under VBR load by computer simulation. We compare the four strategies from two aspects: cell loss ratio ( R ), mean delay( D ). By the comparison, we find that the performances of buffer allocation strategies in shared buffer ATM switches are relate to traffic measure of the ATM switches. In general, the strategies that have buffer sharing are better than that have no buffer sharing. The strategy that has some measures used to prevent some output ports from occupying almost all buffer are better.

关 键 词：异步转移模式 缓冲区分配策略 VBR业务 

分 类 号：TN913.24[电子电信—通信与信息系统]