INDIVIDUAL USER SCANNING METHODS
Original Publication Date: 1994-Oct-01
Included in the Prior Art Database: 2002-Mar-11
Many Land Mobile Radio users have a need to scan for the activity of specific users as well as scan- ning for the activity of specific talkgroups for the purpose of monitoring communications. In some cases, the specific users are supervisory personnel that select between any number of talkgroups on a radio system, and it is not effective to scan for the activity of every potential talkgroup to which these users have access. In other cases, monitoring the activity of specific users (i.e., airport security per- sonnel, etc.) is only desired when specific conditions exist (i.e., emergency triggered by the user, user is at a specific location, etc.). Prior methods of scan- ning do not allow for the activity of specific users to be included in radio scan lists. These methods also SOLUTION Subscriber radio scab lists can include specific user identification numbers, and as the specific users switch to communicatiofis modes, this status infor- mation is relayed to radios desiring to monitor talkgroup activity. The scanning radios include the new talkgroups in the scan list, and use system updates to follow the spe,cific user on the communi- cations system. The figure below for an example of how specific users co&be included a scan list, and how a scan list would ctiange over points in time to follow specific users.