DS-CDMA下行链路分组业务的小区容量估算研究

Research on cell capacity based on DS-CDMA downlink PS-traffic

给出了一种用于预估分组业务(PS)的DS-CDMA网络单小区下行链路容量和基站(NodeB)功率需求的分析方法。并在不同的网络条件下给出了吞吐量的计算结果以及下行链路BLER与Eb/N0的关系。对有关影响网络性能的BLER、码资源和其他方面的因素给予了分析。基于公司实际外场数据,对小区容量的理论公式给予了说明和验证。在使用主扰码和理想的功率控制下,通过计算机仿真得到了下行链路的384Kb/s分组业务容量能够到达310KB/s的结论。并且随着无线信道的波动该容量会有变动。

This paper provides an analytical method to estimate the downlink capacity and NodeB power requirements for Packet-Switch（PS） traffic in a DS-CDMA single cell.Calculation results are given in form of throughput under different con-ditions.The relationship between BLER and Eb/N0 on the downlink is given.This paper also gives some analyses about the influence of actual BLER,code resource and other factors.This paper also gives explanation and demonstration about the theoretical cell capacity equation based on the test data got in the field trial.When only using the primary scrambling codes and considering the power control efficiency,the downlink PS-384 Kb/s traffic capacity in a single cell can reach 310 KB/s.But this value is variable with the change of wireless channel conditions.