基于POMDP的VOD接入控制建模与仿真

Modeling and simulation of the admission control of VOD based on POMDP

为分布式视频点播(video on demand,VOD)接入控制建立了基于POMDP(部分可观Markov决策过程)的数学模型,应用策略梯度优化算法仿真求解模型的最优策略.仿真结果表明,基于POMDP模型的仿真有效地缩短了仿真时间;与传统分布式系统的接入控制方法相比,更合理地利用了系统的资源,可以给运营商带来更大的效益.

A POMDP （partially observable Markov decision process）-based admission control model was proposed for distributed VOD admission control system, and the optimal admission policy was obtained by applying the policy-gradient approach through computer simulation. Simulation results show that model- based simulation can save much more running time compared to system-based simulation. Meanwhile, the policy can make hetter use of the resources and provide more benefits to the providers than the traditional admission policy of distributed system.