Motorola Solutions, Inc.

Cesar D Aguilar

Mohd Syazani Abdul Aziz

Jesus Francisco Corretjer

Dajun Chen

Lisajane M Romer

Harvey D Chambers

A method and device for improved audio intelligibility in a converged land mobile radio (LMR)/broadband (BB) communications system is provided. A converged portable radio operating as part of a talkgroup in the LMR/BB system checks for predetermined triggers during standby that could cause receive radios of the talkgroup to receive degraded audio. If such a trigger is detected then the converged portable radio switches from the LMR system to the BB system and transmits a notification including a change system message to the other converged portable radios of the talkgroup. The notification is transmitted prior to any push-to-talk audio being transmitted from the originating radio. The converged portable radio can transmit, via a push-to-talk switch, narrowband (NB) audio and wideband (WB) audio in parallel over the BB system to the talkgroup subsequent to the detection of triggers and the sending of the notification.

Method for improved audio intelligibility in a converged communication system

A method and apparatus are provided by which a radio communication device relays emergency signals across different channels using dual-watch. A dual-watch primary receiver of the radio communication device is allocated to a user selected home channel, while a dual-watch secondary receiver continually scans a pre-stored list of secondary channels for the purpose of detecting a possible emergency signal. The radio communication device upon detecting an emergency signal in either the home channel or any of the scanned secondary channels, relays the emergency signal to all the channels present in the radio communication device's channel list, except for the originating channel.

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Weston, FL, United States of America

Cesar D Aguilar