  The present Compact Muon Solenoid silicon pixel tracking system has been
designed for a peak luminosity of 1034cm-2s-1 and total dose corresponding to
two years of the Large Hadron Collider (LHC) operation. With the steady
increase of the luminosity expected at the LHC, a new pixel detector with four
barrel layers and three endcap disks is being designed. We will present the key
points of the design: the new geometry, which minimizes the material budget and
increases the tracking points, and the development of a fast digital readout
architecture, which ensures readout efficiency even at high rate. The expected
performances for tracking and vertexing of the new pixel detector are also
addressed.

Instrumentation and Detectors;High Energy Physics - Experiment