Telecommunications – Transmitter and receiver at separate stations
Patent
1991-03-11
1993-05-25
Eisenzopf, Reinhard J.
Telecommunications
Transmitter and receiver at separate stations
455 342, 455 351, 455 542, 4551601, 4551662, 4551861, 455218, H04Q 300
Patent
active
052147908
ABSTRACT:
An enhanced talkgroup scanning algorithm is provided. This algorithm provides an efficient scan function when a unit scan list contains a mixture of trunked talkgroups and conventional channels. This is accomplished by adding a new scanning algorithm for conventional priority groups, and by enhancing the trunking talk group scanning cycle. A novel scanning algorithm for conventional priority groups is used to decrease the audio holes in trunking calls when looking back at a priority conventional channel. When a unit is active on a low priority trunking call and goes over to the priority conventional channel to check for activity, several new steps are taken into consideration when the unit goes back to the trunked system/active trunked call. Based on whether there has been activity on the priority channel, the unit will immediately return to the old voice channel (unsquelched) or revert to the control channel. A novel scanning algorithm for talk groups allows a unit to revert to scanning the conventional groups in the list quicker if there is no activity on the trunked system for any of the trunking groups in the list.
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Kozlowski Thaddeus A.
McDonald Daniel J.
Romano Guy G.
Egan Wayne J.
Eisenzopf Reinhard J.
Keough Timothy H.
Motorola Inc.
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