PTN网络架构中L2转L3设置方案

doi:10.11959/j.issn.1000-0801.2017130

Abstract

Abstract:

Relying on technological superiority,packet transport network（PTN）technology has become the main force in the construction of the transport network.In the early PTN network architecture,the L2/L3 equipment was deployed in the core layer.Therefore,it will face two challenges of poor security and low network performance.Based on China Mobile’s current network,the new PTN architecture which L2/L3 equipment deployed in the convergence layer was proposed,and compared the network security and load capacity with L2/L3 equipment deployment in different level.The result shows that the new PTN architecture is better in terms of network security and efficiency.

Key words: PTN network architecture, L2/L3 equipment deployment, network security, load capacity

CLC Number:

TN913

Xu DENG. L2/L3 equipment deployment scheme in PTN network architecture[J]. Telecommunications Science, 2017, 33(6): 164-170.

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References 9

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序号	链路断点	发生概率	L2/L3 PTN设备设置于核心层		L2/L3 PTN设备设置于汇聚层
序号	链路断点	发生概率	业务中断位置	业务中断百分比	业务中断位置	业务中断百分比
1	①③	P²×(1-P)⁴	A-B	25%	无	0
2	①④	P²×(1-P)⁴	A-B/B-C	50%	无	0
3	②⑥	P²×(1-P)⁴	B-C	25%	无	0
4	③⑥	P²×(1-P)⁴	C-D	25%	无	0
5	①②③	P³×(1-P)³	A-B	25%	无	0
6	①②④	P³×(1-P)³	A-B/B-C	50%	B-C	25%
7	①③④	P³×(1-P)³	A-B/B-C	50%	无	0
8	②③⑥	P³×(1-P)³	B-C/C-D	50%	无	0
9	②④⑥	P³×(1-P)³	B-C/C-D	50%	B-C	25%
10	③④⑥	P³×(1-P)³	C-D	25%	无	0
11	①②③④	P⁴×(1-P)²	A-B/B-C	50%	B-C	25%
12	②③④⑥	P⁴×(1-P)²	B-C/C-D	50%	B-C	25%

方案	L2/L3 PTN设备位置	PTN汇聚环建设数量/个	上联10GE链路数/条	可承载LTE基站上限/千个	能否满足2017年业务需求	能否满足2019年业务需求	可扩展性	网络建设成本
1	核心节点	23	23	4.6	是	否	弱	高
2	骨干汇聚节点	10	10	10	是	是	强	低
3	全部汇聚节点	65	65	65	是	是	极强	极高

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L2/L3 equipment deployment scheme in PTN network architecture

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