Thank you Pix,
But Why are we using SACCH on the signaling frequency?
If we look the mapping SDCCH/8 on TS1 we have from frame 0 to frame 31 SDCCH, and from frame 32 to 47 SACCH (and frame 48 49 50 Idle).
For the SACCH associated with the TCH we send measurement report,
but from SACCH associated with SDCCH what will we sent?