CMS Experiment upgrade plans for High Luminosity LHC Runs

The physics program with pp collision at the Large Hadron Collider (LHC) has been very successful since start-up in 2010 at a center of mass (CM) energy of 7 TeV. The CM energy was increased to 8 TeV during 2012. The compact Muon Solenoid (CMS) collected data which correspond to integrated luminosity of 5.5 fb-1 at 7 TeV and 21.79 fb-1 at 8 TeV respectively. Current planning for the LHC and injector chain foresees a series of long shut-downs where the CM energy will be increased to ~14 TeV whereas the instantaneous luminosity will be increased 2-5 times in stages w.r.t the original design goal. Such upgrades of the accelerator present significant challenges to the operation and performance of the detector, trigger, data acquisition and computing systems. The upgrade plan of the CMS experiment in various fronts to meet the challenges and to take advantage of operating at the high luminosity mode of the LHC will be presented.