PROTO-19: The timestamp should be reported to microsecond resolution

[Benoit Claise <bclaise@cisco.com>]

Dear all,

PROTO-19 "the timestamp of observation of the packet at the Observation
Point. The timestamp should be reported to microsecond resolution."
Nothing is mentioned in this draft regarding this issue.

The idea, to fulfill this requirement, is to add a microsecond precision 
timestamp in the "Basic Packet Report".
However, neither in [PSAMP-INFO] nor in [IPFIX-INFO] we do have absolute 
timestamps except ... that [IPFIX-INFO] specifies the following time 
stamps: flowStartSeconds, flowEndSeconds, flowStartMilliSeconds, 
flowEndMilliSeconds, flowStartMicroSeconds, flowEndMicroSeconds, 
flowStartNanoSeconds, flowEndNanoSeconds.

Considering that a PSAMP Packet Report is a flow composed of a single 
packet, can we reuse the flowStartMicroSeconds Information Element?
Or (if you are a purist), the "flow" prefix is confusing in a PSAMP 
implementation?
Please provide your feedback.

If the latter, then we must define a new Information Element for the 
microsecond precision. And, while doing that, we should define the other 
precision at the same time: second, millisecond, and nanosecond.

timeSeconds

 Description: The absolute time.
 Abstract Data Type: dateTimeSeconds
 ElementId: 
 Status: current
 Units: seconds

timeMilliSeconds

 Description: The absolute time.
 Abstract Data Type: dateTimeMilliSeconds
 ElementId: 
 Status: current
 Units: milliseconds

timeMicroSeconds

 Description: The absolute time.
 Abstract Data Type: dateTimeMicroSeconds
 ElementId: 
 Status: current
 Units: microseconds

timeNanoSeconds
 Description: The absolute time.
 Abstract Data Type: dateTimeNanoSeconds
 ElementId: 
 Status: current
 Units: nanoseconds


Regards, Benoit.


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