METHOD OF CONTROLLING THE TRANSMISSION OF TRAFFIC ON A PACKET DATA CHANNEL
Original Publication Date: 2002-Mar-18
Included in the Prior Art Database: 2002-Mar-18
This paper describes the sequencer that was created to determine the transmission order of data payload and required Link Control (LC) messages on a packet data channel (PDCH) while keeping the channel constantly keyed and filled with information. The need to intertwine data payload and required LC messages on a PDCH is due to the fact a Subscriber Unit (SU) can remain on a PDCH for an extended period of time thereby missing desired voice activity occurring on other channels at the site. The system includes voice call activity in LC messages. Existing trunked systems utilize a Control Channel (CC) and Link Control (LC) Sequencer. Unfortunately, neither sequencer provides a priority mechanism to control the transmission of data payload and required LCs on an active channel. This invention defines the process used by a channel assigned to packet data service to process messages received from various devices and determine the transmission priority of those messages.