基于二级控制器和线性模型的自适应带宽分配算法.

Aiming at the bandwidth allocation problems in virtual networks, this paper presented an adaptive bandwidth allocation algorithm based on two stage controller system. The controller system consisted of a set of SP controllers including VN subcontrollers and InP controllers. Firstly, the performance for each VN at every control interval could be locally approximated by a linear model in order to find the relationship between its past and current bandwidth allocation and its past performances in terms of packet delays. Then, basing on the physical link capacity constraints, the system was response of the requested bandwidth from each VN and adjusted dynamicly in order to achieve flexible distributed autonomous control of the reasonable bandwidth allocation to each VN. The simulation results show that the proposed algorithm can not only allocate the available link capacity reasonably and dynamiclly among multiple VN, but also can improve the availability for total bandwidth and the fairness for bandwidth allocation to meet the QoS requirement of each VN. [ABSTRACT FROM AUTHOR]