I am designing a wifi network to cover wifi access by laptop. I need to cover 1000 square feet of outdoor concrete. I will have 4 1310 AP's, one at each side. Since there is no power or cable out on the flight line the AP's will be at the edge of the concrete. My question is what would be the best antennae's to use for this? Should I use the integrated antennae or others? The client will be roaming all across the flight line and need to be connecting all the time. Thanks.