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随着通信技术迅猛发展,通信业务从单纯的提供语音服务向着能够提供图像、数据、流媒体等新业务的方向发展。为了满足日益增长的用户通信需求,不光对通信核心网提出了更高的要求,也对接入网的要求越来越高。一般来讲,用户网建设成本约占全网建设成本的一半左右,而维护运营成本则占总运营成本的25%左右。因此说用户网的建设和运营
With the rapid development of communication technologies, communication services have been moving from simply providing voice services to providing new services such as images, data and streaming media. In order to meet the growing demand for user communications, not only higher demands are placed on the communication core network, but also the access network requirements are getting higher and higher. In general, the construction cost of the user network accounts for about half of the construction cost of the whole network, while the maintenance and operation cost accounts for about 25% of the total operation cost. So that the user network construction and operation