QoS Management in Next Generation Network

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QoS Management inNext Generation Network

• Jaiyong Lee
• High Performance Multimedia
• Network Lab.
• Yonsei University
• Jyl_at_nasla.yonsei.ac.kr

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Agenda

• Definition of QoS
• Meaning of QoS
• QoS and NGN
• How to Maintain QoS QoS Architecture
• QoS Management
• Traffic Management
• Network Management
• Supporting Protocols

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Definition of QoS

• ATM forum defined by specific parameters for
  cells that are conforming to the traffic
  contract
• IETF RFC2216 the nature of the packet delivery
  service provided, as described by parameters such
  as achieved bandwidth, packet delay, and packet
  loss rate

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Meaning of QoS

• Next Generation Internet Services
• Internet TV Video Stream over 4Mbps
• B2B, P2P Service Personal High Speed Service
  (Game, Movie)
• (DVD Movie 1.5Gbyte)
• Multimedia Portal Video, Broadcast, Combined
  media Education
• ? Maintain QoS parameters (through, delay,
  jitter, error rate) in long sessions

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QoS Control Objective
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QoS and NGN
Wired Access
Edge
Edge
ISP
Backbone
Host
Wireless Access
Enterprize
Node Qos
Node Qos
Access Net Qos
Network Qos
Network Qos
End to End QoS

• MPLS / GMPLS
• IP over WDM

Metro / Gigabit Ethernet XDSL / HFC WLAN
Cellular
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How to Maintain QoS ?

• Need QoS Architecture
• A framework that guarantees the End-to-End
• QoS by providing the integrated functions of QoS
  Control Management, and QoS interface.

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• Principles of QoS Architecture
• Integration reconfigurable, predictable and
  manageable through all layers
• Separation signaling vs. media transfer
• Transparency differentiation of QoS Spec,
  management from application
• Multiple Time Scale among multiple modules
• Performance Efficient protocol processing
• ? QoS Specification QoS Mechanism Traffic
  Engineering Network Management QoS Supporting
  Protocol

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• QoS Specification
• Application Level QoS Requirement
• QoS Policy Strategy in ever layer
• Configure and Maintain QoS Mechanism
• (flow sync spec, performance spec, level of
  service, policy, cost)
• QoS Mechanism
• QoS Provision QoS Mapping, Admission testing
• QoS Control Flow shaping, Flow scheduling,
  Policing, Control, Sync. ? traffic management
• QoS Management QoS monitoring, maintenance

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Traffic Management

• TM
• To prevent the Network and the End system from
  being overloaded
• If overload occurs, TM reacts to the congestion,
  so as to maintain QoS objectives while maximizing
  the use of network resources.
• ATM TM Standards
• ITU-T Study Group XIII / Working Party 2
• ATM Forum TM Working Group (TM 4.0)

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Traffic Management Components
application
Traffic Contract
Service category
Traffic Descriptors
QoS Objectives
Connection level
Conformance Definition
Admission Control
Conformance Monitoring
Cell level
Queueing and Scheduling
Flow Control
Congestion Control
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Traffic Control vs. Congestion Control

• TRAFFIC CONTROL AND CONGESTION CONTROL FUNCTIONS

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Network Management for QoS

• Distributed Management
• Architecture / Protocol Agent X (IETF), CORBA,
  WBEM, Mobile Agent
• MIB RMON I I, Functional MIB, Script MIB

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Key Component of JMX
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AgentX Framework

• Master agent
• Sends and receives SNMP protocol messages in an
  agent role
• But typically has little or no direct access to
  management information.
• Subagent(s)
• Shielded from the SNMP protocol messages
  processed by the master agent
• But which has access to management information

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Script for service testing

• Service testing (QoS monitoring)
• Checking the availability and the static and
  dynamic parameters of a given services.
• Introducing new MIB module
• Lacks flexibility for new services
• Service testing by Script MIB Rapidly adaptable
  to new situation
• Script MIB agent is located where potential users
  are (differ from central manager).
• Script MIB can be installed on several remote
  location which require service monitoring.

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Supporting Protocol

• Access Network Protocols
• IntServ / RSVP
• 802.1p / SBM
• Backbone Protocols
• Diffserv
• Marking and Classification IPv6 DSCP
• Traffic Policing Shaping Token Bucket
• PH B for Resource Allocation / Congestion
  Avoidance
• Flow-based WFQ
• Class-based WFQ
• MWRR / MDRR
• WRED

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• QoS Routing
• QOSPF
• Shortest-widest / widest-shortest
• Route Server-based Routing
• QoS Multicasting
• IGMP
• MOSPF / DVMRP, PIM-CM, PIM-SM, CBT
• QoS Transport
• RTP / RTCP
• ? Diffserv and MPLS
• Diffserv over MPLS
• Diffserv aware MPLS TE