Unicast frame ACK time

Huang Xiaodong xdhuang at eyou.com
Wed Oct 16 03:28:31 EDT 2002


hi£¬

Need your help on following issues:

1)I dump the time stamp seperately when the function "prism2_transmit" and the
interrupt "HFA384X_EV_TX" are called. I consider the difference of these two
timestamps as the latency of a frame's ack, is it right?

2)The interrupt "HFA384X_EV_TX" is called when the unicast frame's acknowlege
is received (may be already several retransmittion happened ), and the
interrupt "HFA384X_EV_TXEXC"(RetryErr) is called when the unicast frame's
acknowlege is not received even maximum retranmission. Is it right?

If my comprehesion is right,Why the duration time (unicast frame) between the
calling of "prism2_transmit" and "HFA384X_EV_TX" is longer than the duration
time between the calling of "prism2_transmit" and interrupt
"HFA384X_EV_TXEXC"(RetryErr)?

Thanks in advance.

Huang Xiaodong





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