Block Ack Policies
1. HT Immediate BlockAck
2. HT Delayed BlockAck
The frames used in these agreements are:
BAR (Block Acknowledgement Request)
To request an acknowledgement to the recipient station, confirming that has received a block of frames.
and
BA (Block Acknowledgement) response
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Each form is exquisite, each block sublime.
Or good, or bad,—disfigur’d, or deprav’d,—
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“Give a scientist a problem and he will probably provide a solution; historians and sociologists, by contrast, can offer only opinions. Ask a dozen chemists the composition of an organic compound such as methane, and within a short time all twelve will have come up with the same solution of CH4. Ask, however, a dozen economists or sociologists to provide policies to reduce unemployment or the level of crime and twelve widely differing opinions are likely to be offered.”
—Derek Gjertsen, British scientist, author. Science and Philosophy: Past and Present, ch. 3, Penguin (1989)