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LTE: What logic is behind to choose a number series for 3GPP specifications ?

+3 votes
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If I concentrate on 3GPP spec numbers then it seems it has some logic to pick a number for a particular interface.
For example: MME has interface with HSS (s6a) and SGW (S11). The details of S6a interface messages captured in 29,272 (Diameter protocol based) while S11 interface messages captured in 29.274 (GTP based). Both interface specification number is started with 29 series even though both the interfaces are based on different protocols i.e. Diameter and GTP.

Any lead on this question will help me out to keep remember the specification numbers.
My friend has been asked for the specification numbers during the interview. Reason being, I asked this question in this forum.
Thanks in advance.

posted Oct 29, 2016 by Ganesh

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