Jackie, I'm very vague on this but I think that kind of bed was unknown or very uncommon in Europe, but was rather middle-eastern.

Europeans in the middle ages did not use mattresses. Rather than make a permanent mattress by stuffing straw or the like into a cloth, one would bed down on a pile of straw (and hence would have to literally "make the bed" each night.)

Ancient egyptian nobility used the frame and rope contraption, whose advantage was that by placing the legs in pots of water, you prevented crawling insects from reaching the noble sleeper. The rope served as a hammock, supporting the sleeper directly, without any mattress.