|Clause title:||Stream identification function|
Rationale for revision
Clause 6.2, item a.2 states that frames that are not identified by a stream identification function shall get the "null value" assigned for the stream_handle. But "null value" is never defined. Different implementations could defined "null value" differently thus resulting in the impossibility to use this stream_handle for other mechanisms like PSFP.
Define "null value" as the numerical value 0. Append the following paragraph at the end of Sect. 6.2: "The null-value, i.e., the stream_handle assigned to packets that belong to no known stream, is 0." Append the following note at the end of Sect. 18.104.22.168 tsnStreamIdHandle: "NOTE - It is also possible to assign a packet that was identified as belonging to a known stream (i.e., a specific tsnStreamIdEntry) a stream handle equal 0, i.e., the null-value."
Impact on existing networks
Current implementations that define "null value" as something different than the numerical value 0 would be non-conformant.
|Affiliation:||TTTech Computertechnik AG|