Radio Link Transfer & Roaming Management
Radio Link Transfer: The wireless link transfer from one cell to another base station is classified into two categories. They are hard handoff and soft handoff The hard handoff is concerned with getting a new radio channel in the cell to which the mobile unit is moved in. When the signal strength in the information flow of a communication link goes below -100 dBm, a new radio wireless link needs to be searched for a better- signal strength in the incumbent cell where the mobile unit has moved in. This is an essential requirement to provide quality reception of the received signal. Otherwise, noise and interference will try to dominate to degrade the signal strength below the acceptable one. In handoff only the neighbouring cell channels at the border of the whole cell are searched for freeness. When a free channel is found in the i...