pdf_gross.gifQuality of Service (QoS) - Issues & their Resolution in evolved 3G and Next Generation Networks

[3-day course, Euro 3,450.- (net) per participant]

backtotop.gifQoS and the related Issues

Course Description

  • Our Playground / Scope of this Course
    • The QoS-Hierarchy:
      Services, Traffic Classes, QoS-Profiles and Parameters, QoS-Parameter Settings, Physical Processing Rules End-to-End View
  • Differences in the Perception of QoS
    • Service specific Differences
    • Standard Organization specific Differences
    • Some Definitions of QoS
  • Operational QoS-Issues
    • Mismatch between E2E- and Network-related QoS
    • Mismatch between offered QoS-Profiles:
      Example 1: Requirements exceed maximum or minimum offered Parameter Values, Example 2: Required Parameter is not considered at all
    • Transport Network Convergence
  • Practical Exercise and Open Discussion: Different Approaches to achieve the desired Quality
    • Over-Provisioning within LAN:
      Cost, Performance, Control, Future-Proof
    • Over-Provisioning within WAN and Mobile Access Networks:
      Cost, Performance, Control, Future-Proof
    • Traffic and Network Engineering within LAN:
      Cost, Performance, Control, Future-Proof
    • Traffic and Network Engineering within WAN and Mobile Access Networks:
      Cost, Performance, Control, Future-Proof

backtotop.gifQoS-Profiles and QoS-Framework

  • Generic QoS-Profile Definition
    • Classification and Description of the Parameters:
      Guaranteed Bitrate and Peak Bitrate, Latency and Jitter (Latency, Processing Delay and Propagation Delay, The Importance of Propagation Delay), Bit Error Rate (BER) and Block Error Rate (BLER), Block Loss Rate, In-Sequence Delivery, Fixed / Variable Packet Size, Minimum Packet Size, Maximum Packet Size
    • Mapping Services to the generic QoS-Profile:
      How to determine the necessary Bandwidth (Example: AMR-Codec 12.2 kbit/s), Conversational Voice and Video Traffic, Audio / Video Streaming Traffic (VoD), Web Browsing, Upload / Download Traffic
  • Mapping proprietary QoS-Profiles to our generic QoS-Profile
    • The QoS-Profile of 3GPP:
      Parameter Overview, 3GPP-Traffic Classes (Conversational Class, Streaming Class, Interactive Class, Background Class), Guaranteed Bitrate, Peak Bitrate, Latency, Jitter, Bit Error Rate, Block Error Rate & Block Loss Rate, In-Sequence Delivery
    • The QoS-Profile within ITU-T Y.1541:
      Parameter Overview (IPTD, IPDV, IPLR, IPER), ITU-T-Traffic Classes (Class 0, Class 1, Class 2, Class 3, Class 4, Class 5), Guaranteed Bitrate, Peak Bitrate, Latency, Jitter, Bit Error Rate, Block Error Rate & Block Loss Rate, In-Sequence Delivery
    • The QoS-Profile of WIMAX / IEEE 802.16e:
      Parameter Overview, WIMAX-Traffic Classes (UGS, RT-VR, NRT-VR, BE, ERT-VR (Extended )
    • Perspective of the User Device:
      Bearer Service Manager, Issues and Problems
  • QoS-related Traffic Administration
    • Traffic Administration in Operation:
      Admission Control, Traffic Conditioning
    • Details of Policy Enforcement:
      Details of the Media Authorization Token (General Information, Address of PDF, Session Identification, Source and Destination Address Identification, Resource Description, Authentication Data)
    • Traffic Policing and Traffic Shaping:
      Details of Traffic Policing, Details of Traffic Shaping, How to determine Excess Traffic
  • IP-related Technologies for QoS-Target Definition
    • Overview:
      DiffServ, IntServ, MPLS
    • Details of Diffserv
      Operation Principles, PHB vs. PDB, Description of Important PHB’s (Overview), DF, CS (Details of the AF(X,Y) PHB (Assured Forwarding)), Details of the EF PHB (Expedite Forwarding), Description of Important PDB’s (BE, LE, AR , VW), Example: PDB’s of the GRX
    • Details of IntServ:
      Introduction and Overview, Controlled Load Services, Guaranteed Services (RFC 2212), Microflow Setup through RSVP (Situation at the Original Transmitter, Situation at Intermediate Routers, Building an Resv-Message at the Receiver, Reception of Resv-Message by the Original Transmitter / Flow Established)
    • Details of MPLS:
      Operation of MPLS-enabled Networks
    • MPLS-Labels and their Format
  • Layer 2 Means for QoS-Target Identification
    • Overview:
      IEEE 802.1p, ATM, UMTS, GPRS, WIMAX, IP-Tunneling in IP
    • IEEE 802.1P
    • GPRS and UMTS:
      Practical Exercise: Adding Protocols to Bearer Services

backtotop.gifEnd-to-End and Step-by-Step QoS

  • End-to-End View (Architecture and Signaling)
    • The involved Protocol Types
    • Scenario Overview
  • Detailed View at this Scenario
    • SIP-Request Message: INVITE (Msg No 1 and 2)
    • DIAMETER: AAR-Message (Msg No 3)
    • DIAMETER: AAA-Message (Msg No 4)
    • SIP-Request Message: INVITE (Msg No 5)
    • SIP-Response Message: 183-Session Progress (Msg No 6 and 7)
    • DIAMETER: AAR-Message (Msg No 8)
    • DIAMETER: AAA-Message (Msg No 9)
    • SIP-Response Message: 183-Session Progress to Peer (Msg No 10)
    • SM: ACT_PDP_CT_REQ-Message to SGSN as Access Router (Msg No 11)
    • GTP: CT_PDP_CTX_REQ-Message to GGSN as Edge Router (Msg No 12)
    • COPS: REQ-Message from Edge Router (PEP) to PDF (Msg No 13)
    • COPS: DEC-Message from PDF to Edge Router (PEP) (Msg No 14)
    • GTP: CT_PDP_CTX_RSP-Message to SGSN (Msg No 15)
    • SM: ACT_SEC_PDP_CT_ACC-Message to Peer (Msg No 16)
    • SIP-Request Message: UPDATE (Msg No 17, 18 and 19)
    • RSVP: PATH-Message (Msg No 20, 21, 22, 23 and 24)
    • RSVP: RESV-Message (Msg No 25 and 26)
    • COPS: REQ-Message from Edge Router (PEP) to PDF (Msg No 27)
    • COPS: DEC-Message from PDF to Edge Router (PEP) (Msg No 28)
    • RSVP: RESV-Message (Msg No 29)
    • RSVP: RESV-Message (Msg No 30)
    • RSVP: RESV-Message (Msg No 31)
    • RSVP: PATH-Message (Msg No 32 and 33)
    • COPS: REQ-Message from Edge Router (PEP) to PDF (Msg No 34)
    • COPS: DEC-Message from PDF to Edge Router (PEP) (Msg No 35)
    • RSVP: PATH-Message (Msg No 36, 37 and 38)
    • RSVP: RESV-Message (Msg No 39)
    • RSVP: RESV-Message (Msg No 40)
    • RSVP: RESV-Message (Msg No 41, 42 and 43)
    • SIP-Response Message: 183-Session Progress (Msg No 44, 45 and 46)

backtotop.gifHow to provide the requested QoS physically

  • Generic View / Important Rules
    • Mapping and Conversion Function
    • Scheduler Function (Layer 2 / Layer 3)
  • Practical Exercise: Relating the Generic View to Real-Life Network Nodes
    • Device with Layer 1, 2, 3 and Application Layers, Device with Layer 1, 2 and 3, Device with Layer 1 and 2
  • QoS in Landline Networks
    • Scheduling Behavior and Issues
    • No Traffic in the High Priority Queue:
      Queue Depth
  • Practical Exercise: QoS in a GPRS Access Network
  • QoS on the UMTS Air Interface
    • HSDPA
    • HSUPA
  • Core Network Portion: TFT-based QoS-Definition (applies to both GPRS and UMTS)
  • QoS in a WIMAX-Access Network
    • Protocol Stack:
      Overview, Downlink Direction, Uplink Direction

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