Method, device, and system for multi-system priority scan

A mobile station in a wireless communication system, the mobile station comprising:

• a transceiver;
• an input;
• a speaker;
• a microphone;
• a processor;
• and
• a computer readable memory having instructions stored thereon that, in response to execution by the processor, cause the mobile station to perform a set of operations comprising:
• maintain a scan list including channels associated with talkgroups the mobile station is interested in receiving, the talkgroups including one or more trunked radio system talkgroups and one or more conventional radio system talkgroups;
• negotiate, with a trunked radio system via the transceiver, a working channel for a particular trunked radio system talkgroup out of the one or more trunked radio system talkgroups, wherein the working channel is a traffic channel that the trunked radio system will first attempt to assign a call for the particular trunked radio system talkgroup;
• and
• during a subsequent scan for talkgroup activity in one or more of the talkgroups in the scan list, scan, via the transceiver, for activity associated with the particular trunked radio system talkgroup by switching to the working channel and determine, via the transceiver, if a carrier is present on the working channel, without switching to a control channel of the trunked radio system to scan for activity associated with the particular trunked radio system talkgroup.

A radio controller in a trunked radio network, the radio controller comprising:

• a transceiver;
• a processor;
• and
• a computer readable memory having instructions stored thereon that, in response to execution by the processor, cause the radio controller to perform operations comprising:
• receive, via the transceiver from a mobile station, a multiple system priority scan request message identifying a particular trunked radio system talkgroup in the trunked radio network;
• identify an available trunked traffic channel, out of a plurality of trunked traffic channels in the trunked radio network;
• assign the available trunked traffic channel as a working channel for the particular trunked radio system talkgroup, wherein the working channel is a traffic channel that the radio controller will first attempt to assign any call for the particular trunked radio system talkgroup to;
• and
• respond to the multiple system priority scan request by transmitting a mapping message to the mobile station that maps the particular trunked radio system talkgroup to the assigned working channel.