Distributed simulcast architecture
First Claim
1. A system for providing communication in a distributed land mobile radio (LMR) system architecture, the distributed LMR system architecture comprising one or more subsystems in communication with a data network, the system comprising:
- one or more LMR sites for providing radio communication among land mobile radios associated with the system, the one or more LMR sites comprising at least one of the one or more subsystems;
one or more subsystem controllers disposed at each of the one or more LMR sites comprising the at least one subsystem, each subsystem controller having at least an active mode and a standby mode, wherein at least one subsystem controller is operable in the active mode to control communication between one or more of the land mobile radios and to control communication between the one or more LMR sites in the at least one subsystem; and
one or more repeaters disposed at each of the plurality of LMR sites in the at least one subsystem, each of the repeaters operable to provide a communication channel for at least one of the land mobile radios to communicate with one or more of the LMR sites in the system,wherein each repeater has at least an active mode and a standby mode, and wherein at least one repeater is operable in the active mode to initiate at least one of a voter comparator operation and a simulcast controller operation using a simulcast controller, andwherein the simulcast controller operation includes assigning a launch time, and sending a signal to repeaters sharing a given repeater channel at other LMR sites whereby a radio call is transmitted simultaneously at the assigned launch time and in phase by the repeaters sharing the given repeater channel.
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Abstract
A system and method for providing communication in a distributed LMR system architecture is provided herein, wherein the system includes a plurality of LMR subsystems interconnected by a data network. In some embodiments, a subsystem may include a distributed simulcast architecture comprising a plurality of LMR sites, each site having a subsystem controller and a plurality of repeaters. In one embodiment, one subsystem controller operates in an active mode and the remaining subsystem controllers operate in standby to provide redundancy. The repeaters include integrated voter comparator and simulcast controller functionality and circuitry. In some embodiments, the repeaters are operable in an active or standby mode, wherein repeaters in the active mode perform voter comparator and simulcast controller functionality. The distributed simulcast architecture provides simulcast controller and voter comparator redundancy, network failure redundancy, and site redundancy.
81 Citations
22 Claims
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1. A system for providing communication in a distributed land mobile radio (LMR) system architecture, the distributed LMR system architecture comprising one or more subsystems in communication with a data network, the system comprising:
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one or more LMR sites for providing radio communication among land mobile radios associated with the system, the one or more LMR sites comprising at least one of the one or more subsystems; one or more subsystem controllers disposed at each of the one or more LMR sites comprising the at least one subsystem, each subsystem controller having at least an active mode and a standby mode, wherein at least one subsystem controller is operable in the active mode to control communication between one or more of the land mobile radios and to control communication between the one or more LMR sites in the at least one subsystem; and one or more repeaters disposed at each of the plurality of LMR sites in the at least one subsystem, each of the repeaters operable to provide a communication channel for at least one of the land mobile radios to communicate with one or more of the LMR sites in the system, wherein each repeater has at least an active mode and a standby mode, and wherein at least one repeater is operable in the active mode to initiate at least one of a voter comparator operation and a simulcast controller operation using a simulcast controller, and wherein the simulcast controller operation includes assigning a launch time, and sending a signal to repeaters sharing a given repeater channel at other LMR sites whereby a radio call is transmitted simultaneously at the assigned launch time and in phase by the repeaters sharing the given repeater channel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for providing communication in a distributed land mobile radio (LMR) system architecture, the distributed LMR system architecture comprising one or more subsystems in communication with a data network, the method comprising:
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providing a plurality of LMR sites for providing radio communication among land mobile radios associated with the distributed LMR system architecture, the plurality of LMR sites comprising at least one of the one or more subsystems; providing a subsystem controller in each of the plurality of LMR sites comprising one of the subsystems, each subsystem controller having at least an active mode and a standby mode; operating one of the subsystem controllers in the active mode to control communication between the plurality of LMR sites and to control communication between one or more of the land mobile radios; operating the remaining subsystem controllers in the standby mode; providing a plurality of repeaters at each of the plurality of LMR sites comprising the subsystem, each repeater having at least an active mode and a standby mode; operating at least one of the repeaters in the active mode to perform at least one of a simulcast controller operation and a voter comparator operation; operating the remaining repeaters in the standby mode, and wherein the simulcast controller operation comprises assigning a launch time, and sending a signal to repeaters sharing a given repeater channel at other LMR sites whereby a radio call is transmitted simultaneously at the assigned launch time and in phase by the repeaters sharing the given repeater channel. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification