基于预留带宽门限和传输等级的带宽分配算法

Bandwidth allocation algorithm based on reserved bandwidth threshold and transmission levels

针对异构无线网络融合环境下多业务传输资源分配问题,提出一种基于预留带宽门限和业务传输等级自适应的分布式带宽分配算法.根据移动终端多宿主传输特性和异构网络分布式资源管理模型,通过构建传输业务的网络效用函数,在传输等级Qo S需求和业务容量约束条件下,将其建模成凸优化问题;根据用户业务请求接入变化,自适应的调整预留带宽门限和业务传输等级,采用动态优化的迭代算法求得最优带宽分配矩阵.仿真结果显示,所提算法在保证网络低的通信开销和满足Qo S需求基础上,达到最大化网络的效用函数和降低业务呼叫阻塞概率的效果.

A distributed adaptive bandwidth allocation algorithm based on reserved bandwidth threshold and traffic transmission levels was proposed to deal with the resource allocation of multi-services in heterogeneous wireless networks（HWNs） .According to the multi-homing technology of mobile terminal and the distributed resource management model of heterogeneous networks, the studied problem was formulated as a convex optimization problem by building the network utility function of traffic under the transmission quality of service （QoS） requirements and traffic capacity constraints.An optimal bandwidth allocation matrix was obtained by a dynamic optimization iterative algorithm under the adaptive adjustment of reserved bandwidth threshold and traffic transmission levels with the change of the customer traffic access request.Numerical results demonstrate that the proposed algorithm can maximize the network utility function and reduce the new calls blocking probability as well as guaranteeing the lower communication cost and QoS requirements.