In the research of DBA(dynamic bandwidth allocation),much attention has been paid to the utilization rate of the bandwidth. Actually,the Qos of the multi-service supporting net is becoming more and more important.

• 在动态带宽分配(dynamic bandwidth allocation,DBA)的研究中,往往对带宽利用率关注较多,但现实是能够支持多业务网络的服务质量(Qos)越来越重要。