Point-to-Multipoint andMultipoint-to-Multipoint Services on PBB-TESystem
Wonkyoung Lee*, Chang-Ho Choi*, Sun-Me Kim*
*Optical Internet Research Department, Electronics and Telecommunications Research Institute, 161
Gajeong-dong, Yuseong-gu, Daejeon, 305-350, Korea
wklee@etri.re.kr, chhchoi@etri.re.kr, kimsunme@etri.re.kr

Abstract— We have implemented point-to-multipoint (PtMP) and multipoint-to-multipoint (MPtMP) services on a packet transportsystem (PTS) based on PBB-TE. The point-to-multipoint (PtMP) connection in the PBB-TE system has been realized by grouping
point-to-point (PtP) packet transport layer (PTL) trunks and mapping a BSI onto the PtP PTL trunks using a multicast backbone
destination address. For providing different capabilities for service selection and priority selection, the PTS offers customers three basic
types of the port-based, C-tagged, and S-tagged service interfaces defined by the IEEE 802.1ah. To offer customers different capabilitiesof the layer 3 applications and services, moreover, an IP-flow service interface have been added. In order to evaluate traffic performancefor PtMP services in the PTS, the PtMP throughputs for the link capacity of 1 Gbps at the four service interfaces were measured in theleaves 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.
Keyword— MAC-in-MAC encapsulation, multipoint-to-multipoint, packet transport system, PBB-TE, point-to-multipoint, service
interface
Wonkyoung Lee received the B.S. degree from the Department of Electronic Engineering, Pusan National University, Pusan, Korea in 1999and the M.S. degree from the Department of Information and Communication Engineering, Gwangju Institute of Science and Technology,Kwangju, Korea in 2001. From 2001 to present, she is with the Optical Internet Research Department, Electronics and Telecommunications
Research Institute, Daejeon, Korea. Her research interests include packet optical transport network and network management.

Chang-Ho Choi received his B.S. degree in Mining and Minerals Engineering from Chonbuk National University, Jeonju, Rep. of Korea, in 1998 and M.S. degree
in Information and Communication Engineering from Chonbuk National University, Jeonju, Rep. of Korea, in 2000. He is currently working
towards his PhD degree at the Chungnam National University, Deajeon, Rep. of Korea. Since 2002, he joined ETRI, Rep of Korea, his work
has been focused on Ethernet and packet transport network technology research. His current interests are packet-optical transport systems andprotection switching in packet transport network.

Sun-Me Kim received the B.S. degree in Computer Science from Chungnam National University, Daejeon and the M.S. degree in Computer Science from Pohang
University of Science and Technology, Pohang, Korea, in 1991 and 1993, respectively. Since 1993, she has been with Electronics andTelecommunication Research Institute (ETRI), Daejeon, Korea, where she is currently a Principal Researcher. Her interested research topics
are packet-circuit-optical converged switching system, multi-layer transport network control and management in packet-optical converged
network and IDC network control