Browse Prior Art Database

METHOD TO AUTOMATICALLY RELEASE INTEROPERABILITY CHANNELS FROM TRUNKING TO CONVENTIONAL USE

IP.com Disclosure Number: IPCOM000004841D
Original Publication Date: 2001-Jul-10
Included in the Prior Art Database: 2001-Jul-10
Document File: 2 page(s) / 47K

Publishing Venue

Motorola

Related People

Jeff Frager: AUTHOR [+2]

Abstract

METHOD TO AUTOMATICALLY RELEASE INTEROPERABILITY CHANNELS FROM TRUNKING TO CONVENTIONAL USE

This text was extracted from a WORD97 document.
This is the abbreviated version, containing approximately 100% of the total text.

The United States Federal Communications Commission has amended rules for the newly allocated channels in the 700 MHz band regarding the use of interoperability channels (ICs) for trunking operation. The FCC rule state that "...the licensee must monitor and immediately release the channels when those channels are needed for interoperability purposes."

This paper proposes a new message and processes for trunking systems to automatically release Interoperability Channel resources from a trunking system for conventional system operation to satisfy the above FCC requirement.

If a Motorola customer desired to use the ICs in their system, a Motorola trunking system does not currently provide an automated method to monitor and release the channel(s). If an IC was implemented today, additional hardware would be required to monitor and release an IC. The manner in doing this could require stand-by repeaters for conventional operation, switching devices, and an audio distribution method. Existing equipment and processes would burden the radio dispatchers with continuous monitoring of the IC for non-trunking channel activity, force them to manually release the channel from the trunking system, and then activate a stand-by conventional repeater. This manual method could add significant cost to a customer system.

The invention described here will require a specific message from a conventional subscriber unit (SU) on the Interoperability Channel (IC). The message sourced from the SU will propagate through the trunking network infrastructure and the infrastructure components. On receipt of the subscriber conventional request message the system will:

1. Remove the IC from the available trunking resources.

2. Create a message alerting the radio dispatchers of the activity.

3. Acknowledge success of the operation to the initiating subscriber.

4. Route the digitized voice information to the trunked radio dispatch console(s).

After some system configurable timeout following loss of conventional channel activity, the channel will be reclaimed by the trunking system controller for trunked use.

Use of this feature will allow the convenient use of IC channels for additional system capacity by trunked systems where more desirable exclusively allocated channels are not available.

If implemented, this invention would create a strategic advantage in areas where channel availability is limited. A price advantage could be realized by not having to supply additional hardware to perform a function implemented in software. Additionally, this automated method would be more convenient for console operators and radio operators to use than alternative system implementations.