speed so you may have a mobile moving at a relatively high speed say 30 km hr that chooses to connect to the higher carrier frequency which we have seen from the simulation results is suboptimal from a performance point of view thus the mobile connects to whatever cell it deems best and then based on speed measurements of this mobile while it is in rrc connected mode the base station can decide to initiate an inter frequency handover by signaling the mobile to tune to a different carrier frequency and then the mobile must go through the air interface connection procedure on the new carrier frequency this process introduces delay in the mobile 39 s data transfer as it can take on the order of 100 200 milliseconds to switch carrier frequencies and the network must bear additional signaling load for this transfer to happen to reduce the occurrences of such inter frequency handovers we propose enabling the mobile to select a particular carrier frequency directly from rrc idle mode based on its speed for example we propose that each time a mobile is in rrc connected mode with a particular base station that the base station make a speed measurement on this mobile when the mobile is about to disconnect from the base station and transition back to rrc idle mode e g because there has been no data transmission for a certain period of time the procedure in 3gpp lte is that.