摘要
本文提出了一种DS CDMA系统上行链路中基于效用函数 (utilityfunction)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 basedRadioResourceAllocation Effi ciencyFocused)和URRA UF (Utility basedRadioResourceAllocation UserFocused) .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 .
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.
出处
《电子学报》
EI
CAS
CSCD
北大核心
2004年第10期1594-1599,共6页
Acta Electronica Sinica
基金
国家自然科学基金 (No 60 2 72 0 2 1 )
教育部优秀青年教师计划
关键词
无线资源优化
多媒体DS-CDMA系统
效用
市场
均衡
无线资源分配算法
无线通信系统
Algorithms
Code division multiple access
Computational complexity
Computer simulation
Enterprise resource planning
Mathematical models
Multimedia systems
Optimization
Quality of service
