Services in the UMTS: QoS

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Services in the UMTSQoS

• Janika Nano

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• Service
• functionality offered to a user
• a component of the portfolio of choices
• Application
• service enabler

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Service classification (1)
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Service classification (2)

• In existing systems
• basic services (bearer services, teleservices)
• supplementary services
• 3GPP defines
• service capabilities
• bearers defined by QoS parameters
• mechanisms to realise services
• not the services themselves

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QoS traffic classes

• Conversational class
• voice, video conferencing
• Streaming class
• video streaming
• Interactive class
• Web browsing, gaming
• Background class
• Background email download

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List of attributes

• Traffic class
• Maximum bitrate (kbps)
• Guaranteed bitrate (kbps)
• Delivery order (y/n)
• Maximum SDU size (octets)
• SDU format information (bits)
• SDU error ratio
• Residual bit error ratio

• Delivery of erroneous SDUs (y/n/-)
• Transfer delay (ms)
• Traffic handling priority
• Allocation/Retention Priority
• Source statistics descriptor (speech/unknown)
• Signalling Indication (Yes/No)

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UMTS QoS architecture
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UMTS bearer attributes for each bearer traffic
class
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Defining the QoS parameters in radio access
bearer set-up
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In order to support QoS

• Protocol for QoS signaling
• Resource provisioning technique
• QoS management and control

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QoS signaling

• RSVP, DSCPs, SIP, PDP context
• 5 scenarios for end-to-end QoS signaling are
  described by 3GPP
• however they are not guaranteed to work

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Resource provisioning technique

• overprovisioning, DiffServ, IntServ, MPLS
• not prescribed by 3GPP

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QoS management and control

• 3GPP specifies
• control plane service manager, translation
  function, admission/capability control,
  subscription control
• user plane mapping function, classification
  function, resource manager, traffic conditioner
• 3GPP does not specify
• resource management

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References

• www.etsi.org
• www.3gpp.org
• www.3g-generation.com
• www.umts-forum.org

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• Thank you for your attention!