Services in the UMTS: QoS Janika Nano

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

Service classification (1)

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

QoS traffic classes Conversational class – voice, video conferencing Streaming class – video streaming Interactive class – Web browsing, gaming Background class – Background download

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)

UMTS QoS architecture

UMTS bearer attributes for each bearer traffic class

Defining the QoS parameters in radio access bearer set-up

In order to support QoS Protocol for QoS signaling Resource provisioning technique QoS management and control

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

Resource provisioning technique overprovisioning, DiffServ, IntServ, MPLS not prescribed by 3GPP

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

References

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