多业务CDMA系统中的反向负荷预测
Prediction of reverse traffic load in multiple services CDMA systems
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摘要: 在综合语音、数据等多种业务的CDMA蜂窝移动通信系统中,由于请求接入的各业务的传输速率、服务质量不同,接入业务后小区负荷变化的程度也各不相同,为了保证系统的稳定性,必须对系统正常运行时的负荷进行限制,该文提出了一种在多业务、多速率环境下,预测CDMA系统接入新业务后反向负荷变化的方法,并给出了用该方法预测的小区反向负荷和仿真结果的比较。Abstract: In a Code Division Multiple Access (CDMA) mobile communication system which supports multiple services, such as voice, and data, the variation degree of the cell load after adding a connection is different for the services with different data, rates and quality of service (QoS) requirements. Hence the cell load must be constrained to preserve the system stability. This paper presents a method for forecasting the increment of the cell reverse load after adding a new connection of a pre-defined service type. The method is then exemplified by applying it to predict the reverse load in a typical system. The results are further validated by computer simulation.
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