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With economic development , urban high-rise buildings continue to emerge , resulting in some of the existing good coverage area into covering the weak area or blind spot ; urban expansion and new development zone , College Park and the residential area to become the new coverage blind spots ; while the corresponding indoor building also become a need to solve the coverage area . In addition a large number of users of the wireless data industry development , leading to tension in the network data resources , the urgent need to resolve this issue in order to highlight the advantages of CDMA wireless data , Current CDMA expansion project . Perfect in the focus of the coverage area of ??the network and achieve the the boutique network building requirements in network coverage and quality , reasonable network layout , network quality is good . Quzhou Unicom from 2001 began building a CDMA network and has already gone through the seven stages of the project : one , two , three , the first phase of three second stage , four , five , and six . Combination of user demand and traffic changes after the pre-engineering network analysis and depth of network coverage , marketing strategy , brand image , data services and the development of value-added services , the CDMA network coverage and capacity , not restricting the user development factors , the current CDMA expansion project construction mainly rely on the adjustment of the existing network optimization to enhance the quality of the network and improve the urban , high-speed network coverage , in principle, to expand the coverage of effectiveness or low effective area network ; adjust network optimization further improve network utilization in the region does have the capacity requirements for low-cost expansion of a small amount of
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