光网络的发展趋势与挑战

doi:10.3969/j.issn.1000-0801.2011.02.001

Abstract

Abstract:

At beginning this paper presents a prediction on future network traffic trends and major applications. Then, the emphases will put on developments and challenges of 100 Gbit/s system and transparency trend in backbone network area.In the following part the paper describes trend from point to point transmission to dynamic transport networking. Then the paper analysis trends, debates and challenges of MAN area. In the final part, the paper will put emphases on existing problems and development trends in access network area, in particular on development trends and challenges on FTTH model.

Key words: optical fiber network, 100 Gbit／s, FTTH

Leping Wei. Development Trends and Challenges of Optical Fiber Networks[J]. Telecommunications Science, 2011, 27(2): 1-6.

	PTN	路由器
标准	MPLS-TP（不成熟）	IP/MPLS（成熟）
	Y.1731,CCSA（成熟）
L3功能	无，增强型有	有
VPN	L2 VPN，增强型有L3	L2/L3 VPN、VPN跨域
组播	仅L2，增强型有L3	丰富的L2/L3组播协议
OAM功能	MPLS-TP OAM未成熟Y.1731成熟	Ethernet/MPLS/L3 OAM，需要硬件升级支持BFD扩展
网管	简单明了，继承SDH	很弱，需加强
复杂性	软件代码几十万	软件代码百万级
成本	低（已远低于MSTP）	高（正在简化适应回传场景）

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Development Trends and Challenges of Optical Fiber Networks

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