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本文从无线网络特点的角度出发,从网络使用者最熟悉的GSM对传输网络的需求分析着手,分析了无线网络的基本特征对传输网络的需求。通过对比3G包括IP化在内的不同于GSM的新需要,提出在3G的回传网络上,哪些功能与性能是必须借鉴2G传送网的,哪些是必须在2G回传网络上提升的。基于以上分析,对于业界呼声很高的PTN产品,给出有利于现网平滑演进的PTN网络所必须具备的功能模型。
In this paper, from the perspective of wireless network characteristics, starting from the most familiar GSM users on the transmission network needs analysis, analysis of the basic characteristics of the wireless network transmission network needs. By comparing the new requirements of 3G, including IP, which are different from GSM, it is proposed that which functions and performances need to learn from the 2G transport network and which ones must be promoted on the 2G backhaul network in the 3G backhaul network. Based on the above analysis, for the PTN products with high voice in the industry, a functional model necessary for the PTN network that is conducive to smooth network evolution is provided.