Constructions of optimal GDRP(n,λ;v)(n,λ;v)’s of type λ1μm−1λ1μm−1

Generalized doubly resolvable packings (GDRPs) represent a combinatorial characterization of constant composition codes (CCCs). In this paper, we develop a number of general constructions of GDRPs of type λ1μm−1λ1μm−1. As a consequence, a new series of optimal CCCs is obtained.