[Detnet] Traffic description in DetNet flow info model

[zhayiyong <[e-mail]>]

Hi All,

Recently we have some discussion among authors of the two flow info model draft. The DetNet flow info model should provide some common concepts and description of the flow. One part is traffic specification of the flow. Here is something not clear, is DetNet dealing with VBR flows and what attributes are needed? And how to deal with VBR flow, for source guarantee purpose, do we need to define shaping parameters?

In architecture draft, section 4.1.2, "The traffic characteristics of an App-flow can be CBR (constant bit rate) or VBR (variable bit rate)". In section 4.3.2, mentions synchronous flow and asynchronous flow, but no details of that.
In use case draft, for some cases such as industrial and BAS, it can assumes that the traffic is periodic with constant rate. For cases such as Cellular Radio and M2M, there is usually no assumption on the traffic. E.g., CoMP traffic is between two eNBs, it is hard to say the flow is constant rate.

Cheers,
Yiyong