一種基于計費的WCDMA功率控制方法
Efficient power control via pricing in wcdma systems
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摘要: 在第三代移動通信系統(tǒng)中,為了有效地提高系統(tǒng)容量和通信質量,需要對無線資源如發(fā)射功率作合理的動態(tài)分配。該文通過研究 WCDMA系統(tǒng)中上行鏈路的干擾情況,推導得出 WCDMA系統(tǒng)的容量與業(yè)務性能指標的關系。通過定義網絡資源份額,將功率控制問題轉換為總量小于1的網絡資源份額的分配問題。然后利用統(tǒng)一價格拍賣對網絡資源份額進行最優(yōu)配置,使得發(fā)射功率這一重要無線資源合理地分配給對其評價最高的用戶業(yè)務。最后給出了上述算法的數值仿真。Abstract: The transmit power is a major radio resource and requires careful planning and control if optimal system performance and maximal user capacity are to be achieved. In this paper, a new power control algorithm based on pricing is proposed in the context of third gener-ation multimedia rnultirate Wideband CDMA (WCDMA) mobile communications. Firstly, the paper defines the multiplication of users data rate and minimum required SIR as users demand of network resource, and then derives the relationship between system capacity, transmit power and normalized demand called network resource share. By introducing uniform-price auction, the paper uses pricing to maximize the social benefit by making efficient allocations of transmit power, when demand exceeds supply which leads to congestion. In the end, numerical results are presented to validate the analytical results and the proposed power control algorithm.
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