[ppsp] Questions on ACK message in PPPS-PP

현욱 <whyun@etri.re.kr> Mon, 19 October 2015 09:39 UTC

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From: 현욱 <whyun@etri.re.kr>
To: "ppsp@ietf.org" <ppsp@ietf.org>
Thread-Topic: [ppsp] Questions on ACK message in PPPS-PP
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Subject: [ppsp] Questions on ACK message in PPPS-PP
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Hello all,

I have two questions regarding ACK message of PPSP-PP,

Is ACK message sent on every DATA message or REQUEST message?
Or implementation-dependent?
I know that it should be sent after integrity confirmation, but not sure how often it should be sent?

As for my understanding, one REQUEST message may lead to multiple DATA message.
In this case, one ACK should be sent? or multiple ACK should be sent?

For example,
One REQUEST message is sent for three chunks, and three DATA messages are sent accordingly.
In this case, how many ACK messages should be sent?

What happen it a peer does not receive ACK?

I would be grateful for any help.
Thank you.