  An oscillating universe model is discussed, in which the singularity of the initial state of the universe is avoided by postulating an upper limit on spacetime curvature. This also results in the devising of the simplest possible structure - a primitive particle (usually called preon), which can be considered as the basic constituent of matter that have no properties except for the property of carrying a unit chromoelectric charge. The SU(3)xU(1)-symmetry of its field results in the emergence of a unique set of structures reproducing exactly the observed variety of the fundamental fermions and gauge bosons. The discussed scheme allows finding answers to many fundamental questions of the standard particle physics and cosmology based on a very few primary constituents. 
An oscillating universe model based on chromoelectric fields