Page 27 - ITU-T Focus Group Digital Financial Services – Consumer Experience and Protection

ITU-T Focus Group Digital Financial Services
Consumer Experience and Protection

Figure 2: Model for quality of service parameters

Persisting problems with the KPIs for layers 1, 2and 3 of a mobile network need to be resolved by the stakeholder
in the interest of any mobile service and are therefore clearly out of scope of QoS-for-DFS-considerations.

NOTE: This diagram is in the process of being updated. First of all, layers 1 to 3 describe actually a kind of
“pyramid of needs”, i.e. before one can start to think about service integrity (e.g. call drop rate in telephony),
the service needs to be accessible first. Also, the “service” picture needs an overhaul. The “circuit/packet
switched” division is legacy from 2G or 3G. Some of the “services" in Layer 4 actually depend on each other
or belong to different groups. There are “carrier services” such as basic IP, and also combined services using
one or more such carrier services, e.g. MMS relies on SMS (which is actually an end user related service as
well) for notification, and uses packet data to actually transfer data. A “service” with the same effect for end
users, e.g. some kind of OTT chat with attached files, uses only basic packet data.

In any case, there is no real “technology dependency” anymore. If an operator decides to suppress Skype, or
prioritizes certain video streaming, this is not the result of some fundamental ability or inability, but just the
effect of some “traffic shaping” elements.

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