多媒体DS-CDMA系统中基于效用函数的 无线资源优化策略

本文提出了一种DS-CDMA系统上行链路中基于效用函数(utility function)的无线资源分配策略.在该模型的框架下,我们提出了两种基于效用函数的无线资源分配算法:URRA-EA (Utility-based Radio Resource Allocation-Efficiency Focused)和URRA-UF (Utility-based Radio Resource Allocation-User Focused).URRA-EF旨在追求系统资源的全局最优化,而相比之下URRA-UF在用户公平性方面更有优势.为避免非线性优化带来的过高的计算复杂度,我们将基于效用函数的无线资源分配问题转换为一个市场模型,这样资源的最优配置将以分布式的模式获得,因此计算复杂度将大大降低.仿真结果表明,该策略与传统方式相比能够更灵活有效的配置无线多媒体DS-CDMA系统中的无线资源,其性能提高是显著的.

Utility-Based Radio Resource Optimization for Multimedia DS-CDMA Systems

We present a model based on utility functions for radio resource allocation (RRA) in multimedia DS-CDMA systems.We proposed two utility-based RRA algorithm,URRA-EF (Utility-based Radio Resource Allocation-Efficiency Focused) and URRA-UF (Utility-based Radio Resource Allocation-User Focused).The goal of URRA-UF is to achieve the resource optimization which maximizes the system overall utilities,while URRA-UF has its advantages on providing fairness to users.To avoid high computational complexity of solving nonlinear optimization problems,we reformulate the utility-based RRA problem as a market model so that the optimal resource allocation can be achieved in a distributed manner.Simulation results show that our algorithm is flexible and efficient for mobile multimedia DS-CDMA systems,and the improvement of performance is significant.