demands this invention doesn 39 t do any limitation here all the non broadcast management control frames except the random access request response frame and independent resource request frame need to send acknowledgement frame or implied acknowledgement the implied acknowledgement means that the unicast management control frame which has the corresponding response frame can regard the response frame as the acknowledgement frame of this frame the non broadcast management control frame doesn 39 t need to acknowledge immediately response frame just needs to response in the maximum physical frame if the response frame which delivered by cap doesn 39 t receive the acknowledgement frame of sta it can deliver this response frame again before it reaches the default maximum retransmission when the retransmission times exceed the described default maximum times the delivering end will give up this frame whether the data frame uses instant acknowledgement and delayed acknowledge is decided by the delivering end the receiving end can indicate whether it needs the instant acknowledgement or not according to the installed indication frame acknowledgement method of mac header the waiting interval of frame acknowledgement by using the instant acknowledgement is a time period while the waiting interval of frame acknowledgement by using the delayed acknowledgement is decided by the delivering end if the.