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http://dx.doi.org/10.7840/KICS.2012.37.6B.433

Point-to-Multipoint Services and Hierarchical QoS on PBB-TE System  

Lee, Won-Kyoung (한국전자통신연구원 차세대통신연구부문 광인터넷연구부)
Choi, Chang-Ho (한국전자통신연구원 차세대통신연구부문 광인터넷연구부)
Kim, Sun-Me (한국전자통신연구원 차세대통신연구부문 광인터넷연구부)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.37, no.6B, 2012 , pp. 433-442 More about this Journal
Abstract
We have proposed a solution to multicast services and an advanced quality of service (QoS) mechanism on a packet transport system (PTS) based on PBB-TE. The point-to-multipoint (PtMP) connection in the PBB-TE system have been realized by grouping point-to-point (PtP) PTL trunks and mapping a BSI onto the PtP PTL trunks using a multicast backbone destination address. To provide end-to-end QoS of the PtMP services, the hierarchical QoS scheme for backbone service instances and connection-oriented paths has been implemented in the PTS. For providing different capabilities for service selection and priority selection, the PTS offers to customers three basic types of the port-based, C-tagged, and S-tagged service interface defined by the IEEE 802.1ah. To offer to customers different capabilities of the layer 3 applications and services, moreover, an IP-flow service interface have been added. In order to evaluate traffic performance for PtMP services in the PTS, the PtMP throughputs for the link capacity of 1 Gbps at the four service interfaces were measured in the leaves of the ingress edge node, the transit node, and the egress edge node. The throughputs were about 96 % because the B-MAC overhead of 22 bytes occupies 4% of the 512-byte packet. The QoS performance is ability to guarantee an application or a user a required bandwidth, and could be evaluated by the accuracy of policing or shaping. The accuracy of the policing scheme and the accuracy of the shaping scheme were 99% and 99.3% respectively.
Keywords
Point-to-multipoint; PBB-TE; hierarchical QoS; MAC-in-MAC; policing; shaping;
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