QUICK CONTROL CHANNEL LOOKBACK SEARCH ON NEW ADJACENT SITE INFORMATION DURING FAILSOFT
Original Publication Date: 1998-Sep-01
Included in the Prior Art Database: 2002-Jul-22
In a Motorola trunked radio system a subscriber unit (SU) in a failsoft mode of operation will period- ically leave the failsoft channel to perform a control channel (CC) lookback search. The CC lookback search consists of reprogramming the SU to the CC frequencies of sites which are learned either through roaming to the site or through adjacent site informa- tion broadcasts. If CC operation is found on any of the CCs, failsoft operation will be exited and trunk- ing operation will resume. Failsoft CC lookback searches will be performed after a SU programma- ble time period (defaulted to 2 minutes; programma- ble up to 4 minutes) in which no voice transmission has been performed by the user.