pre - existing methods of accessing a radio system via a random access channel as described in 3gpp ts 44 . 018 “ radio resource control protocol ” is modified to include a first additional parameter , which defines the spreading of the probability density function for each successive access attempt . in accordance with one embodiment the accessing user / device is configured to use a random wait time for the j - th retry to access the rach as a function of the additional parameter and the number j , where j is a positive integer .