Incomplete hypercubes make the hypercubes more flexible on task alloca
tion in large cubes, cost of manufacturing hardware, and hypercubes wi
th faulty nodes. In this correspondence, we devise and analyze a broad
casting algorithm based on edge-disjoint spanning trees in an incomple
te hypercube of 2n + 2k nodes, where 0 less-than-or-equal-to k less-th
an-or-equal-to n. The broadcasting algorithm is strictly optimal.