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Engineering for QoS and the limits of service differentiation

Engineering for QoS and the limits of service differentiation

IWQoS June 2000. Engineering for QoS and the limits of service differentiation. Jim Roberts (james.roberts@francetelecom.fr). The central role of QoS. feasible technology. quality of service transparency response time accessibility. service model resource sharing

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1.01k views • 91 slides
Supporting Ethernet in OBS networks

Supporting Ethernet in OBS networks

Supporting Ethernet in OBS networks. Sami Sheeshia and Chunming Qiao Department of computer science and engineering State University of New York at Buffalo Jeffrey U.J.Liu Computer and Communications Research Lab Industrial Technology Research Institute, Taiwan

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548 views • 42 slides
MPLS

MPLS

MPLS. Label Distribution Protocols. Overview of Hop-by-hop & Explicit Label Distribution Protocol (LDP) Constraint-based Routing LDP (CR-LDP) Extensions to RSVP. Label Distribution Protocol: Four categories of messages. Discovery messages

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644 views • 35 slides
Token Bucket Leaky Bucket

Token Bucket Leaky Bucket

Token Bucket Leaky Bucket. Leaky Bucket. (a) A leaky bucket with water. (b) a leaky bucket with packets. Token Bucket. We want to allow some burstiness . x(t) is the instantaneous sending rate, . Max bits b(u). Slope= average rate. Max burst rate. Interval size u. b(u)= r u +b.

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1.02k views • 32 slides
QoS Fundamentals

QoS Fundamentals

QoS Fundamentals. QoS Framework. Static Functions Traffic and QoS specifications (traffic types/parameters) QoS negotiation and signalling Admission control Resource reservation Dynamic Functions Traffic shaping and policing Queuing and scheduling (later) Congestion control (later).

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445 views • 31 slides
Real-Time Protocol (RTP)

Real-Time Protocol (RTP)

Real-Time Protocol (RTP). Provides standard packet format for real-time application Typically runs over UDP Specifies header fields below Payload Type : 7 bits, providing 128 possible different types of encoding; eg PCM, MPEG2 video, etc. Sequence Number : 16 bits; used to detect packet loss.

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438 views • 30 slides
Real-Time Protocol (RTP)

Real-Time Protocol (RTP)

Real-Time Protocol (RTP). Provides standard packet format for real-time application Typically runs over UDP Specifies header fields below Payload Type : 7 bits, providing 128 possible different types of encoding; eg PCM, MPEG2 video, etc. Sequence Number : 16 bits; used to detect packet loss.

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927 views • 30 slides
Chapter 23. Congestion Control and Quality of service

Chapter 23. Congestion Control and Quality of service

Chapter 23. Congestion Control and Quality of service. 23.1 Data Traffic 23.2 Congestion 23.3 Congestion Control 23.4 Two Examples 23.5 Quality of Service 23.6 Techniques to Improve QoS 23.7 Integrated Services 23.8 Differentiated Services 23.9 QoS in Switched Networks.

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426 views • 30 slides
Design Principle: Multiplexing

Design Principle: Multiplexing

Design Principle: Multiplexing. Goals: identify, study common architectural components, protocol mechanisms what approaches do we find in network architectures? synthesis: big picture. design principles: separation of data, control hard state versus soft state randomization indirection

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371 views • 22 slides
Overall Performance of the DCS

Overall Performance of the DCS

Overall Performance of the DCS. PVSSII operation Limiting factors in distributed environment Cold configuration of the DCS. Data Generator Used in the Tests. The data generator executed a set of dpSet commands to a single datapoint

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306 views • 21 slides
Introduction to Traffic Shaping

Introduction to Traffic Shaping

Introduction to Traffic Shaping. Traffic Regulation. Traffic regulation ( or traffic conditioning) refers to mechanisms to enforce that traffic from a flow or a group of flows adheres to a given specification Policing Drop traffic that violates the specification Shaping

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243 views • 19 slides

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