資訊學院研究能量與研發成果,Broadband Communications 研究群 楊啟瑞 林盈達 陳 健 陳耀宗,Broadband Communications Research Areas,Optical Networking TCP-Friendly Congestion Control Request scheduling for links and servers Broadband Switches WDM Optical Networks High Performance Gateway Design (for P2P, Streaming, Mobility, Home Multimedia, etc.),Broadband Communications Research Directions (楊啟瑞),Optical Networking,Broadband Communications Selected R www.nbl.org.tw), 2002 Co-Founder, L7 Networks Inc. (www.L.tw), co-invested by D-Link, ZyXEL, and Advantech, 2002 Consultant, CCL/ITRI, 2002 Well-cited paper: Multihop Cellular: A New Architecture for Wireless Communications, INFOCOM 2000, YD Lin and YC Hsu; # of citations: 150,Broadband Technologies Broadband Switches Network Processor NAPT and IP Classifier Packet Scheduling WDM Optical Networks Multigranularity Cross-connect WDM Networks Traffic Engineering in GMPLS Networks,Broadband Communications Research Directions (陳 健),1 0 0 0 0 0 0 0 0 0 1 1,1 0 1 1 0 0 0 0 0 0 1 1,1 0 1 0 0 0 0 0 0 0 1 1,1 1 0 0 1 0 0 1 0 0 1 1,1 1 0 0 0 1 1 0 0 0 1 1,1 1 0 0 1 1 0 1 0 0 1 1,1 0 0 0 0 0 0 0 0 0 1 1,0 0 0 0 0 0 0 0 1 0 1 1,0 0 0 0 0 0 0 0 1 1 1 1,Bit-compression packet classifier#,1,2,3,4,5,6,7,8,9,10,11,12,CR1 (Compressed Region),CR2,CR3,CR4,x1,x2,x8,x5,x9,x3,x4,x6,x7,#Chia-Ren Hsu, Chien Chen, and Chun-Yuan Lin, Fast Packet Classification Using Bit Compression, IEEE Globecom 2005,00,Lookup table,1,01,2,10,5,E,E,00,10,01,01,01,E,1st layer,00,3,01,7,2st layer,00,01,01,01,E,E,E,E,Y-Dimension,00,6,01,8,3rd layer,00,01,01,E,E,E,E,E,00,4,01,9,X-wildcard,00,01,E,E,E,E,E,E,00,10,Y-wildcard,X-Dimension,F,F,F,F,00,F,10,01,01,F,00,00,01,01,01,F,F,F,F,F,00,00,00,00,01,01,F,F,F,F,3,4,5,6,8,9,10,1,1,7,2,00,F,F,F,F,F,F,F,F,F,Multidimensional Coding Vector (MCV) Packet Classifier,Transmission rate on IXP 2400 Network Processor,Cousin-Fair Scheduler,A hierarchical scheduling system is cousin-fair if resources are distributed such that each final consumer (leaf of a tree) receives a fair share.,BS,SSA,SSB,1,2,3,4,5, = queue weight q = queue size w = service (timeslot) size,w =120,1 = 2 q1 = 50,2 = 3 q2 = 50,3 = 2 q3 = 40,4 = 3 q4 = 40,5 = 5 q5 = 20,WA= 40,WB=80,w1 = 16,w2 = 24,w3 = 24,w4 = 36,w5 = 20,Sibling-fair (locally-fair) hierarchical scheduler,=5,=10,wB =70,wA =50,Cousin-fair (globally-fair) hierarchical scheduler,w1 = 20,w2 = 30,w3 = 20,w4 = 30,w5 = 20,Multigranularity Cross-connect WDM Networks,Increase in number of wavelength channels and fibers for higher available capacity However, cause a scalability problem in maintenance and manufacturing of the optical cross-connects (OXCs) Multigranularity OXCs (MG-OXCs) have been proposed to provide a cost-efficient way to support the growing demand for bandwidth,Weighted Tunnel Allocation (WTA),Step1: Transform a physical topology to an auxiliary graph (e.g. length constraint = 2) Step2: Estimates the amount of traffic traveling through each logical link by routing the historical traffic matrix trough auxiliary graph Step3: Measure the weight of each logical link (weight = expected load on the link) Step3: Allocate tunnels according to the weights Step4: Makeup Process,Broadband Communications Research Directions (陳 耀 宗),Peer-to-Peer Computing Content Distribution Architecture Security Mobility over Heterogeneous Networks Wireless Home Networking,Broadband CommunicationsSelected R&D Results,P2P Security gateway P2P Content Distribution Architecture Home Multimedia Gateway Scalable Internet Services Architecture Seamless Mobility,P2P Security Gateway,P2P Gateway Programming Architecture,For user configuration and system status monitoring,Shape P2P traffic and update recognize tables,Recognize P2P packets and pass to core component,Intel egress library ACE,Intel ingress library ACE,P2P Analyzer Algorithm,Transport Layer Identification of P2P traffic Based on common behaviors of P2P applications,Home Media Gateway Hardware Architecture,Home Media Gateway Software Architecture,AS,WAN,AS,NAT,Firewall,ISB,ISB,SC,Scalable Internet Service Broker,SC,User,ISB,Service Subscriber,Service Provider,httpd,BSSP client,BSSP client,forked,forked,Listen Socket,TCP Knitter,Process,Port Range,browser,TCP Knitting,Major Projects,Excellence Project: Next Generation Information Communications Networks (後卓越計劃， 國科會， 20042008) Network Security 全光都會網狀/環狀骨幹及其互聯之光纖及無線擷取網路整合技術(國科會，20062009) 快速移動性下多模無線存取網路架構中品質服務技術研究設計 P2P content distribution infrastructure ( Project in preparation),