Motorola Corporation

Motorola Solutions, Inc.

Donald R Griffis

Tanhoa Trandai

Daniel J McDonald

David R Mills

John M Gilbert

Marc W Cassidy

Joseph Namm

Clara Sanchez

John J Nauful

Joseph C Namm

Jeff D Smith

Christopher H Wilson

Andor Almasi

A receiving device in the trunked radio communications system receives an outbound signaling word comprising at least an opcode field and a band plan field, wherein the opcode field indicates that the outbound signaling message is a system status message and the band plan field indicates the band plan in use on the site. In another embodiment, the receiving device receives an outbound signaling word comprising at least an opcode field, a site identification field and a four bit band plan field, wherein the opcode field indicates that the outbound signaling message is an adjacent control channel message, the site identification field identifies a second site, and the four bit band plan field indicates the band plan in use on the second site.

Method for indicating a band plan for a trunked radio communications system

A method and system for assigning priority to a talk group of a plurality of talk groups in a communication network () is provided. The method includes detecting () activity on a first talk group () via a Vehicular Repeater (VR) (). The first talk group is associated with a lower priority than that of a second talk group (). The method also comprises assigning () a higher priority to the first talk group and the lower priority to the second talk group, based on the step of detecting. Further, the method comprises dynamically re-assigning () the higher priority and the lower priority amongst the plurality of talk groups, based on detecting activity.

Method and system for communicating within a communication network

A method and system for communicating within a wireless communication network () is provided. The communication between Portable Subscriber Units (PSUs) (and) by using a Vehicular Repeater () over a conventional communication link () is attempted (). If the conventional communication link attempt fails (), the communication is initiated directly from one PSU () to at least one other PSU () by using a direct channel link ().

Method and system for communicating within a wireless communication network

A receiving device in a trunked radio communications system determines a transmit frequency, wherein the transmit frequency is calculated by subtracting a voice channel number from 759, multiplying by a channel spacing and adding a base frequency to yield the transmit frequency. The receiving device determines a receive frequency by a base frequency+[(759&#x2212;a voice channel number)*25,000 Hz], where the base frequency is at least one of 851.0125 MHz, 851.0250 MHz, and 851.000 MHz. In any case, the voice channel number is communicated in an outbound signaling message defined by Motorola's 3600-baud radio trunking protocol.

Method for preventing an unauthorized device from operating in a 800 MHz trunked radio communications system

A receiving device in a trunked radio communications system determines a transmit frequency, wherein the transmit frequency is calculated by subtracting a voice channel number from 559, multiplying by a channel spacing and adding a base frequency to yield the transmit frequency, if the voice channel number is between 559 and 320. The receiving device determines a receive frequency by 851.0250 MHz+[(559&#x2212;a voice channel number)*12,500 Hz], if the voice channel number is between 559 and 320. In any case, the voice channel number is communicated in an outbound signaling message defined by Motorola's 3600-baud radio trunking protocol.

Method for preventing an unauthorized device from operating in an 800 MHz trunked radio communications system using channels 559 to 320

A receiving device in a trunked radio communications system determines a transmit frequency, wherein the transmit frequency is calculated by subtracting a voice channel number from 319, multiplying by a channel spacing and adding a base frequency to yield the transmit frequency, if the voice channel number is between 319 and 0. The receiving device determines a receive frequency by 851.0125 MHz+[(319&#x2212;a voice channel number)*25,000 Hz], if the voice channel number is between 319 and 0. In any case, the voice channel number is communicated in an outbound signaling message defined by Motorola's 3600-baud radio trunking protocol.

Method for preventing an unauthorized device from operating in an 800 MHz trunked radio communications system using channels 319 to 0

A receiving device in a trunked radio communications system retrieves a first frequency, wherein the first frequency relates to a lowest frequency that the at least one repeater utilizes for transmission and tunes to about the first frequency. If no control channel messages are decoded at the first frequency, then the receiving device tunes to about a second frequency wherein the second frequency is a channel separation of 12.5 kHz from the first frequency. If no control channel messages are decoded at the second frequency, then the receiving device, iteratively increments the second frequency by the channel separation until the second frequency reaches an end of band frequency for the trunked radio communications system.

Growing community of inventors

Sunrise, FL, United States of America

Donald R Griffis