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학술지
PBB-TE 기반의 패킷 전송 시스템에서 멀티캐스트 서비스와 계층적 QoS 구현
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- 발행일
- 201206
- 출처
- 한국통신학회논문지 B : 네트워크 및 서비스, v.37B no.6, pp.433-442
- ISSN
- 1226-4717
- 출판사
- 한국통신학회 (KICS)
- 협약과제
- 12VI1400, 차세대 광전달망 구축을 위한 테라급 광-회선-패킷 통합 스위칭 시스템 기술개발, 이종현
- 초록
- 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.
- KSP 제안 키워드
- B-MAC, End to End(E2E), End-to-End QoS, IEEE 802, IP-Flow, Link capacity, Multicast services, Packet transport, Point-to-Point, QoS Performance, Service Interface