  A systematic analysis of the like-sign dipleton signature for gluino
production at LHC is performed in the $R$-conserving minimal supersymmetric
standard model, taking into account the top quark and Higgs boson effects in
the cascade decay. We consider two representative values of the gluino mass,
300 and 800 GeV, along with those of the other SUSY parameters. While the top
quark contribution is kinematically suppressed for the former case it is very
import for the latter. Ways of separating the signal from the background are
discussed. One expects a viable LSD signals upto a gluino mass of $\sim 800$
(1200) GeV at the low (high) luminosity option of LHC over practically the full
parameter space of MSSM.
