Abstract: In a wireless communication system (100), a communication unit parameter is sent to a plurality of communication units (105-108) during a first period of time using either a group update method or an individual update method (401). A first set of communication units that did not receive the communication unit parameter is determined (402) and, during a second period of time, the communication unit parameter is sent to the first set of communication units using only the individual update method (403). During the second period of time, the communication unit parameter is sent based on primary and/or secondary regions of operation for each communication unit and also upon detection of update opportunities. This process can be repeated for any number of communication unit parameters (404). Using this method, updates of communication unit parameters have a high likelihood of being successfully and efficiently performed.