摘要
无线网络中的多媒体业务具有很大吸引力。本文将多媒体业务分为实时业务和非实时业务,提出了一种呼叫接入控制优化算法CAC-RA,此算法通过采用马尔科夫方法,排队论和非线性规划模型,同时解决呼叫允许控制和资源优化分配问题。提出的利益函数考虑了最大利用资源,同时满足无线网络各类用户的QoS要求,同时尽量减少用户的资源重新分配的频率和幅度变化,仿真实验数据显示CAC-RA算法能较好地适应业务变化的网络,同时实现了较为理想的利益值,满足无线网络多媒体用户的QoS要求。
Multimedia services are very attractive in wireless networks. In this paper, multimedia traffic is classified into two classes：real-time traffic and non real-time traffic. An improved call admission control algorithm CAC-RA is proposed which manage call admission control （CAC） and optimize resource allocation （RA） together by adopting Markov Decision Process approach, queuing theory and formulating a nonlinear programming model. The proposed revenue function is in the sense of optimizing the utilization of resources, satisfying Quality of Service （QoS） aspects for multiple classes of adaptive multimedia services in wireless networks, and reducing frequency and change of range of resource reallocation of the user. Numerical results of emulation reveal that the proposed CAC-RA scheme adapts itself well to time-varying multimedia traffic, at the same time, achieves better revenue and satisfies QoS requirements of multiple classes of multimedia services in wireless networks.
出处
《信号处理》
CSCD
北大核心
2007年第3期343-347,共5页
Journal of Signal Processing
基金
国家自然科学基金(60472034)
关键词
无线网络
多媒体
呼叫允许控制
资源分配
Wireless networks
Multimedia
Call Admission Control
Resource Allocation
