Introduction All-IP [1-4] All-IP packet switching long delay time, jitter packet loss All-IP Budget-Based QoS End-to-End QoS (real time on demand) 1
1.1 Circuit Switching Packet Switching DWDM IP VoIP Packet Switching 1.1 1. 1 2
VoIP, MPLS, Network Convergency DWDM, IP over SDH, IP over Fiber FTTx, xdsl, HFC, LMDS, 3G LNP, MNP, Service Creation 1.1.1 IP Network Convergence All-IP Network Network Convergence circuit switching packet switching IP All-IP 1.2 1. 2 PSTN/IN Internet Converged Network QoS-enabled Network ( ) Intelligence 3
PSTN/IN Internet Converged Network Intelligent CPE Circuit-switching Packet-switching Packet-switching Network Underlying transport network Network Network High Low High Service reliability Service creation Complex Ad-hoc Systematic Medium High High Ease of use of service Evolvability/mod Low Medium High ularity Time to market Long Short Short service Architecture Low High High openness 4
1.1.2 (Real-time Application on Packet-Switching Networks) circuit-switching packet-switching 1.3 packet-switching circuit-switching All-IP packet-switching (Long Delay) IP hop circuit-switching (Jitter) Hop Hop (Packet Loss) (Drop) 1. 3 Circuit-Switching Packet-Switching Circuit-Switching Packet-Switching 5
Circuit-Switching Packet-Switching 1.2 QoS Definitions VoIP (Delay and Jitter) FTP 1.2.1 Diversified QoS Expectations 6
1.3 IP QoS over All-IP Networks All-IP QoS QoS All-IP (Voice over IP) delay time All-IP All-IP All-IP 7
1.4 UMTS UMTS QoS Service Class 3GPP 1999 UMTS (Universal Mobile Telecommunications System) [6] QoS UMTS QoS Radio Network Radio Network Core Network interface Core Network Radio Network W-CDMA Dedicated Channel Shared Channel Soft Handover Optimized Handover handover PDP (packet data protocol) contexts GTP (GPRS Tunnel Protocol) Radio Network Core Network QoS tunnel ATM IP DiffServ UMTS : (conversational class) (stream class) (interactive class) (background class) delay time jitter delay time 300 ms packet flow jitter data communication 1.1 8
1.4 1.5 1. 1 UMTS 1. 4 UMTS Traffic class Max Bit Transfer Guaranteed Traffic SDU Error Rate Delay Bit Rate Priority Rate Conversational Streaming Interactive Background 9
1. 5 UMTS QoS DiffServ QoS Traffic Class Service Max Bit Lost Rate Delay Jitter Class Rate Conversational EF1 2Mb/s <10-6 < 100ms low jitter Streaming EF2 2Mb/s <10-6 150ms ~ 400ms Interactive AF[1..3] 2Mb/s 10-3 ~ 10-4 Background BE 2Mb/s 1.5 QoS QoS Management IP IP community IETF (Internet Engineering Task Force) [7] IntServ (integrated service)[8] DiffServ (differentiated service) (Ref.) 1.5.1 Integrated Service IntServ RSVP (Resource Reservation Protocol) (virtual circuit) QoS (routing protocols) overhead 10
(scalability) 1.5.2 Differentiated Service DiffServ IntServ DiffServ QoS Per-Hop Behavior DiffServ domain IntServ IntServ DiffServ DiffServ End-to-End QoS DiffServ behaviors : 1. Expedited Forwarding (EF)[9] : VoIP VoD 2. Assured Forwarding (AF)[10]: EF QoS QoS QoS AF flow drop precedence flow priority flow 3. Best Effort (BE)[11] : BE QoS email ftp ) DiffServ 11
DiffServ domain core router End-to-End Intserv RSVP (RSVP message) DiffServ QoS Core Router DiffServ network flow End-to-End QoS 1.6 Motivation and Research Objective (request/traffic flow/phone call) per flow End-to-End QoS per flow End-to-End QoS 12
1.7 Solution Approach BBQ(Budget-Based QoS) QoS (real time on demand) BBQ BBQ BBQ End-to-End Network QoS Coordination LPPA Global ACA LPPA Long Path long term soft Global ACA real time LPPA Long Path real time hard 1.8 13
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