M.Tech I Year II Semester (R17)
Introduction: Need For QoS , Definition of QoS, Review of Probability Theory, Statistical Characterization of a Stochastic Process, Stationarity, Strict Sense Stationarity (SSS), Wide Sense Stationarity (WSS) Queuing Theory Basics, Real-Life Examples of Queuing, Definition of Queuing System, Birth-Death Process Model, Arrival Rate, Definition Empirical Determination of Arrival Rate, Stationarity , Ergodicity , The Poisson Arrival Markov Modulated Poisson Process (MMPP), Service Rate, Utilization Factor, Queuing System Performance Metrics, Little’s Theorem , M/M/1 Queue.
QoS Metrics: Network Types, Connection-Oriented Packet Network Services, Connectionless Packet Network, Digital Communications System, Source Coding, Waveform Coding, Linear Predictive Coding, packetization, Voice Over IP, Packetization, Channel Coding, Interleaving, Error Correction, Modulation, QoS of Real Time Services. Delay: Frame Delay, Packetization Delay, Interleaving Delay, Error Correction Coding Delay, Jitter Buffer Delay, Packet Queuing Delay, Propagation Delay, Effect of Delay, End-To-End Delay, Objectives, Delay Variation , Source of Delay Variation, Packet Loss Probability. Blocking Probability: Trunked Channel Systems, Offered Traffic Load, Units of Traffic Load, Trunk Utilization Factor, Erlang B System, Erlang C System.
IP QoS Generic Functional Requirements: Introduction, Packet Marking, Packet Classification, Traffic Policing, Traffic Rates, Line Rate, Peak Information Rate (PIR) Committed Informationrate (CIR),Burst Sizes, Traffic Metering And Coloring, Single Rate Three Color Marker (SRTCM),Two Rate Three Color Marker (TRTCM), Active Queue Management, Tail Drop Method And TCP Global Synchronization Random Early Discarding (RED),Weighted Random Early Discarding (WRED),Explicit Congestion Notification (ECN),General Concept, ECN Marking in the IP Header, ECN Marking in The TCP Header, ECN Handshaking And Operation. Packet Scheduling: FIFO, Priority Queuing (PQ),Fair Queuing (FQ),Weighted Round Robin (WRR),Weighted Fair Queuing (WFQ), Class-Based WFQ (CB WFQ), Traffic Shaping, Pure Traffic Shaper, Token Bucket Traffic Shaper.
IP Integrated Services And Differentiated Services : Integrated Services: Intserv Basic Functional Requirements Resource Reservation Protocol (RSVP) Overview Of RSVP, RSVP Operation, RSVP Reservation Styles, RSVP Message Format Path Message RESV Message. Differentiated Services: Diffserv Overview, Diffserv Architecture Diffserv Packet Marking, Packet Marking In Conventional Routers, Diffserv (DS) Field Diffserv Code Points (DSCP’s) Per-Hop Behaviors (PHB’s) Expedited Forwarding (EF) Phb Assured Forwarding (AF) PHB.
QoS in ATM Networks : Genesis of ATM ATM Network Interfaces , ATM Protocols ATM Cell Layer, ATM Adaptation Layer (AAL) , ATM Virtual Connections, Virtual Channel and Virtual Path ,Virtual Links Virtual Connections Virtual Path connection (VPC) Virtual Channel Connection (VC), Permanent Virtual Connection (PVC), Switched Virtual Connection (SVC) ATM QoS Parameters, Information Transfer Performance, End-To-End Performance, Performance Management Information Base (MIB),
ATM Service Categories, ATM Service Categories, Traffic Descriptors, AAL Types , ATM Connection Admission Control, A Model of ATM Switch, Logical Port Bandwidth Allocation, CAC For CBR Traffic, CAC For VBR Traffic MPLS : Why Use MPLS, Conventional IP Packet Forwarding, MPLS Advantages, MPLS Architecture, Label Encoding, MPLS Shim Header , Label Encoding Over ATM, ATM SVC Encoding, ATM SVP Encoding, ATM SVP Multipoint Encoding , MPLS Implementation, MPLS Operation, Label Mapping, Incoming Label Map (ILM), FEC-To-NHLFE (FTN) Map Label Swapping.
For Experiments 1 to 7 Performance may be evaluated through simulation by using the
parameters Throughput, Packet Delivery Ratio, Delay etc.
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