Traffic on Prism 2.4 card

Need help!!! I am seeing more traffic RX than TX on AP with Prism 2.4 card. I was expecting the traffic pattern to be reversed. Is my logic wrong? If my thinking is correct how can I find what is causing all the RX traffic? I am seeing the traffic on the wireless interface traffic graph. Torch shows TX traffic but no significant RX traffic. Thanks, in advance!!!