3G传输网技术及演进策略

传输网作为运营商规模最大、结构最为复杂的基础网络,演进的平滑性、兼容性是最为关键的问题。通过对3G传输网分类及结合3G各业务阶段的发展特点,分别探讨了接入和核心传输网传输技术、方案的演进过程。总之,在网络建设的不同时期,演进应根据网络情况和需求采用不同的3G传输方案,对于PTN的引进则从传输网的核心层逐步向接入层推进。

Technology and Evolution of 3G Transmission Network

As the most complex and largest basic network of the operator,the smooth evolution and compatibility of transmission network is the most critical issue.In this paper,based on analysis of the classification and characteristics of the 3G transmission network,the technology and mechanism evolution of the access and core transmission network is explored.Generally,in the course of evolution,the different 3G transmission schemes should be adopted according to network conditions and demands of the different periods,the PTN’s introduction is a step-by-step process from the core layer to the access layer of the transmission network.