多業(yè)務(wù)CDMA系統(tǒng)中的反向負(fù)荷預(yù)測(cè)
Prediction of reverse traffic load in multiple services CDMA systems
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摘要: 在綜合語(yǔ)音、數(shù)據(jù)等多種業(yè)務(wù)的CDMA蜂窩移動(dòng)通信系統(tǒng)中,由于請(qǐng)求接入的各業(yè)務(wù)的傳輸速率、服務(wù)質(zhì)量不同,接入業(yè)務(wù)后小區(qū)負(fù)荷變化的程度也各不相同,為了保證系統(tǒng)的穩(wěn)定性,必須對(duì)系統(tǒng)正常運(yùn)行時(shí)的負(fù)荷進(jìn)行限制,該文提出了一種在多業(yè)務(wù)、多速率環(huán)境下,預(yù)測(cè)CDMA系統(tǒng)接入新業(yè)務(wù)后反向負(fù)荷變化的方法,并給出了用該方法預(yù)測(cè)的小區(qū)反向負(fù)荷和仿真結(jié)果的比較。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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