Abstract: The present disclosure provides a system and method for simulating a land mobile radio system having a plurality of radio sites. The simulation system may comprise an IP network providing an IP-based interface between components within the system such as, for example, a first server designed to simulate one or more radio sites, a second server designed to simulate one or more subscriber units, and a controller interface for providing commands for controlling the simulated subscriber units. Each site in the first server may include one or more site applications each associated with an IP address, and each subscriber unit in the second server is associated with a plurality of IP addresses for communicating with the site applications over the IP network.

Abstract: Disclosed is an interoperability gateway system that provides backup connection between a dispatch center and a Land Mobile Radio (LMR) system in the event the dispatch center is disconnected from the LMR system. In general, this may be accomplished by providing an RF link between the disconnected site and the interoperability gateway via a controller, or interoperability site network interface (ISNI), that is activated when the dispatch center is disconnected from the LMR system. The interoperability gateway provides the backup connection by allocating a control station for each channel available at the disconnected LMR system. When compared to conventional dispatch console backup schemes, the disclosed interoperability gateway system greatly reduces the equipment needed to provide dispatch console backup, thereby decreasing equipment and operation costs, and simplifying operation by providing a solution that is virtually transparent to the dispatcher.

Abstract: The present disclosure provides a system and method for simulating a land mobile radio system having a plurality of radio sites. The simulation system may comprise an IP network providing an IP-based interface between components within the system such as, for example, a first server designed to simulate one or more radio sites, a second server designed to simulate one or more subscriber units, and a controller interface for providing commands for controlling the simulated subscriber units. Each site in the first server may include one or more site applications each associated with an IP address, and each subscriber unit in the second server is associated with a plurality of IP addresses for communicating with the site applications over the IP network.

Abstract: An exemplary land mobile radio dispatch console and method are provided. In one embodiment, the console has the capability to process and handle Requests To Talk (RTT) and emergencies. In another embodiment, the console has the capability to provide a history. In another embodiment, the console provides the capability for operators to configure and save patches of predefined groups for later use. In another embodiment, the console includes a telephone interconnect interface component, and combinations of features mentioned above.

Abstract: An exemplary land mobile radio dispatch console and method are provided. In one embodiment, the console has the capability to process and handle Requests To Talk (RTT) and emergencies. In another embodiment, the console has the capability to provide a history. In another embodiment, the console provides the capability for operators to configure and save patches of predefined groups for later use. In another embodiment, the console includes a telephone interconnect interface component, and combinations of features mentioned above.

Abstract: The present disclosure provides a system and a method for providing mobility management and out-of-coverage indication in a conventional Land Mobile Radio (LMR) system. A radio provides its location and user group data to the disclosed system through its traffic channel when the channel is idle. Knowledge of the radio's current location and user group data is used to provide dynamic call routing and data management within the disclosed system. The disclosed system and method may provide operability similar to that of a trunking system by providing mobility management and out-of-coverage indication while providing low-cost benefits through operation of a conventional system.

Abstract: Disclosed is an interoperability gateway system that provides backup connection between a dispatch center and a Land Mobile Radio (LMR) system in the event the dispatch center is disconnected from the LMR system. In general, this may be accomplished by providing an RF link between the disconnected site and the interoperability gateway via a controller, or interoperability site network interface (ISNI), that is activated when the dispatch center is disconnected from the LMR system. The interoperability gateway provides the backup connection by allocating a control station for each channel available at the disconnected LMR system. When compared to conventional dispatch console backup schemes, the disclosed interoperability gateway system greatly reduces the equipment needed to provide dispatch console backup, thereby decreasing equipment and operation costs, and simplifying operation by providing a solution that is virtually transparent to the dispatcher.

Abstract: The present disclosure provides a system and a method for providing mobility management and out-of-coverage indication in a conventional Land Mobile Radio (LMR) system. A radio provides its location and user group data to the disclosed system through its traffic channel when the channel is idle. Knowledge of the radio's current location and user group data is used to provide dynamic call routing and data management within the disclosed system. The disclosed system and method may provide operability similar to that of a trunking system by providing mobility management and out-of-coverage indication while providing low-cost benefits through operation of a conventional system.

Abstract: Disclosed is an interoperability gateway system that provides backup connection between a dispatch center and a Land Mobile Radio (LMR) system in the event the dispatch center is disconnected from the LMR system. In general, this may be accomplished by providing an RF link between the disconnected site and the interoperability gateway via a controller, or interoperability site network interface (ISNI), that is activated when the dispatch center is disconnected from the LMR system. The interoperability gateway provides the backup connection by allocating a control station for each channel available at the disconnected LMR system. When compared to conventional dispatch console backup schemes, the disclosed interoperability gateway system greatly reduces the equipment needed to provide dispatch console backup, thereby decreasing equipment and operation costs, and simplifying operation by providing a solution that is virtually transparent to the dispatcher.

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.

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.

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.

Abstract: An exemplary land mobile radio dispatch console and method are provided. In one embodiment, the console has the capability to process and handle Requests To Talk (RTT) and emergencies. In another embodiment, the console has the capability to provide a history. In another embodiment, the console provides the capability for operators to configure and save patches of predefined groups for later use. In another embodiment, the console includes a telephone interconnect interface component, and combinations of features mentioned above.

Abstract: An exemplary land mobile radio dispatch console and method are provided. In one embodiment, the console has the capability to process and handle Requests To Talk (RTT) and emergencies. In another embodiment, the console has the capability to provide a history. In another embodiment, the console provides the capability for operators to configure and save patches of predefined groups for later use. In another embodiment, the console includes a telephone interconnect interface component, and combinations of features mentioned above.

Abstract: A method and system are provided for peer-to-peer communication among a plurality of sites in a land mobile radio (LMR) system. The sites are interconnected by a data network, such as an IP network. When a site, referred to as the initiating site, intends to communicate with other sites, the initiating site transmits a call request message. The call request message is multicast over the data network to the intended recipients. The initiating site receives an acknowledgement message from the other sites confirming their willingness to communicate with the initiating site. The initiating site then sends a voice message, via multicasting, to the other sites interested in the call.

Abstract: The present disclosure provides a system and a method for providing mobility management and out-of-coverage indication in a hybrid system comprised of conventional LMR sites and trunking LMR sites. If a radio is located at a conventional site, the radio provides its location and user group data to the disclosed system through its traffic channel when the channel is idle. If the radio is located at a trunking site, the radio provides its location and user group data to the disclosed system through the trunking site's control channel. Knowledge of the radio's current location and user group data is used to provide dynamic call routing and data management within the disclosed system. The disclosed system and method provides seamless communication between a trunking site and a conventional site while concurrently enhancing the hybrid system to provide mobility management and out-of-coverage indication features typically associated with a stand-alone trunking system.

Abstract: The present disclosure provides a system and method for simulating a land mobile radio system having a plurality of radio sites. The simulation system may comprise an IP network providing an IP-based interface between components within the system such as, for example, a first server designed to simulate one or more radio sites, a second server designed to simulate one or more subscriber units, and a controller interface for providing commands for controlling the simulated subscriber units. Each site in the first server may include one or more site applications each associated with an IP address, and each subscriber unit in the second server is associated with a plurality of IP addresses for communicating with the site applications over the IP network.

Abstract: Disclosed is an interoperability gateway system that provides backup connection between a dispatch center and a Land Mobile Radio (LMR) system in the event the dispatch center is disconnected from the LMR system. In general, this may be accomplished by providing an RF link between the disconnected site and the interoperability gateway via a controller, or interoperability site network interface (ISNI), that is activated when the dispatch center is disconnected from the LMR system. The interoperability gateway provides the backup connection by allocating a control station for each channel available at the disconnected LMR system. When compared to conventional dispatch console backup schemes, the disclosed interoperability gateway system greatly reduces the equipment needed to provide dispatch console backup, thereby decreasing equipment and operation costs, and simplifying operation by providing a solution that is virtually transparent to the dispatcher.

Abstract: The present disclosure provides a system and method for simulating a land mobile radio system having a plurality of radio sites. The simulation system may comprise an IP network providing an IP-based interface between components within the system such as, for example, a first server designed to simulate one or more radio sites, a second server designed to simulate one or more subscriber units, and a controller interface for providing commands for controlling the simulated subscriber units. Each site in the first server may include one or more site applications each associated with an IP address, and each subscriber unit in the second server is associated with a plurality of IP addresses for communicating with the site applications over the IP network.

Abstract: A method and system for authentication of sites in a land mobile radio (LMR) system and encryption of messages exchanged by the sites. In some embodiments, the method includes transmitting a certificate created by a trusted authority by applying a function to a first site public key using the trusted authority's private key to generate a reduced representation, which is encrypted with the trusted authority's private key. Other sites may receive the certificate, decrypt it using the trusted authority's public key, and authenticate the first site. The method may further include generating a session key, encrypting it with the public key of the first site, and transmitting the encrypted session key to the first site. The first site decrypts the encrypted session key with the first site's private key, and transmits a message encrypted with the shared session key to other sites for decryption using the session key.