Browse Prior Art Database

IMMEDIATE SOFT ID DISPLAY WITH INTELLIGENT UPDATE

IP.com Disclosure Number: IPCOM000008721D
Original Publication Date: 1998-Jun-01
Included in the Prior Art Database: 2002-Jul-05
Document File: 2 page(s) / 97K

Publishing Venue

Motorola

Related People

Brian E. Traub: AUTHOR [+3]

Abstract

Soft ID is an existing two-way radio feature using a short user-configurable alphanumeric identifier which is transmitted in a digital voice transmission using embedded low speed data fields. This ID is a supplement to the numeric individual ID which is currently used to distinguish between radio units during transmission. The Soft ID allows the assignment and subsequent transmission of a unique identifier which a decoding radio unit can display for the user's information.

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MOTOROLA Technical Developments

IMMEDIATE SOFT ID DISPLAY WITH INTELLIGENT UPDATE

by Brian E. Traub, Gary Hunsberger and Dave Mills

BACKGROUND INFORMATION

  Soft ID is an existing two-way radio feature using a short user-configurable alphanumeric identifier which is transmitted in a digital voice transmission using embedded low speed data fields. This ID is a supplement to the numeric individual ID which is currently used to distinguish between radio units during transmission. The Soft ID allows the assignment and subsequent transmission of a unique identifier which a decoding radio unit can display for the user's information.

  In the APCO Project 25 digital voice Common Air Interface, the low speed data information is transmitted at a rate of 4 bytes per superframe, which is 4 bytes every 360 milliseconds. A Soft ID implementation which needs 12 bytes of low speed data would take at least three superframes to complete transmission. This amounts to 1.08 seconds for a complete transmission. In the case of a late-entry voice call, the receiving radio would have to wait for the completion of the first Soft ID and attempt decode and qualify the second received Soft ID. This could add up to another full second of voice transmission necessary to decode the ID. Each time an error in the voice transmission occurs, there is a chance that the Soft ID data would be corrupted, and another 1.08 seconds of voice would be

necessary before recovery.

  The display of a numeric ID is possible a mere 180 milliseconds into a voice call, since the Link Control (LC) word with the numeric ID can be decoded at the 'halfway' point of the first super- frame. The voice superframes must be relatively error free for one to two seconds for the complete set of Soft ID low speed data bytes to be received and this textual ID displayed on the subscriber radio.

  In many situations, given the constraints of the voice protocol, the Soft ID may never be displayed during an average length voice call.

SOLUTION

  The Soft ID information can be recorded as it is received from various voice transmi...