Abstract: A system and method for providing land mobile radio (LMR) content using a cellular data network is provided. The method includes communicating the LMR content via at least one of an LMR network and a cellular data network. The method further includes encapsulating the LMR content using a packet switching protocol when communicating the LMR content via the cellular data network.

Abstract: A multimode land mobile radio (LMR) and a method of communicating land mobile radio (LMR) content using an LMR device are provided. The LMR includes an LMR communication portion configured to provide communication with an LMR network and a cellular data network communication portion configured to provide communication with a cellular data network.

Abstract: A system and method for providing land mobile radio (LMR) content using a cellular data network is provided. The method includes communicating the LMR content via at least one of an LMR network and a cellular data network. The method further includes encapsulating the LMR content using a packet switching protocol when communicating the LMR content via the cellular data network.

Abstract: A wireless communication network is provided that includes a plurality of communication cells each defined by at least one communication coverage area and a plurality of access points each corresponding to a different one of the plurality of communication cells. Each access point is configured to communicate on a first frequency with at least one of (i) a subscriber in the at least one communication coverage area in a first communication cell and (ii) a subscriber in a second communication cell. Each access point is further configured to communicate on a second frequency with an access point in a third communication cell.

Abstract: A method for radio frequency multicasting and a multicast site architecture are provided. The method includes assigning a different traffic multicast Internet Protocol (IP) address to each of a plurality of groups of LMR users and encapsulating the LMR content within IP packets. The method further includes transmitting the IP packets to one of the plurality of groups of LMR users using at least one of the assigned traffic multicast IP addresses.

Abstract: A multimode land mobile radio (LMR) and a method of communicating land mobile radio (LMR) content using an LMR device are provided. The LMR includes an LMR communication portion configured to provide communication with an LMR network and a cellular data network communication portion configured to provide communication with a cellular data network.

Abstract: A multiple protocol land mobile radio (LMR) and a method for communicating LMR content are provided. The method includes communicating the LMR content using a plurality of LMR transport protocols within a single LMR network. The method further includes encapsulating the LMR content based on an LMR application layer protocol for a portion of the single LMR network through which the LMR content is to be communicated.

Abstract: A transcoder architecture and method for transcoding in land mobile radio (LMR) systems are provided. The LMR system includes a first communication site configured to communicate using a first LMR communication protocol and a second communication site configured to communicate using a second LMR communication protocol. The LMR system further includes a transcoder configured to receive LMR content from the first communication site communicated using the first LMR communication protocol and digitally convert the LMR content to the second LMR communication protocol to be communicated to the second communication site.

Abstract: A multimode land mobile radio (LMR) and a method of communicating land mobile radio (LMR) content using an LMR device are provided. The LMR includes an LMR communication portion configured to provide communication with an LMR network and a cellular data network communication portion configured to provide communication with a cellular data network.

Abstract: A wireless communication network is provided that includes a plurality of communication cells each defined by at least one communication coverage area and a plurality of access points each corresponding to a different one of the plurality of communication cells. Each access point is configured to communicate on a first frequency with at least one of (i) a subscriber in the at least one communication coverage area in a first communication cell and (ii) a subscriber in a second communication cell. Each access point is further configured to communicate on a second frequency with an access point in a third communication cell.

Abstract: A wireless communication network is provided that includes a plurality of communication cells each defined by at least one communication coverage area and a plurality of access points each corresponding to a different one of the plurality of communication cells. Each access point is configured to communicate on a first frequency with at least one of (i) a subscriber in the at least one communication coverage area in a first communication cell and (ii) a subscriber in a second communication cell. Each access point is further configured to communicate on a second frequency with an access point in a third communication cell.

Abstract: A method for distributing group secrets (e.g., group ID and password combinations) for use in communication systems such as trunked radio communication systems. A user group record containing one or more group secrets is encrypted at an administrator using a user secret (e.g., a user ID and password combination) known to the administrator and to a communication device. The encrypted user group record is then distributed to the communication device where it is decrypted using the user secret.

Abstract: A wireless communication network is provided that includes a plurality of access points. A plurality of the access points are configured as local access points that are each configured to operate at one of a set of frequencies and within a communication range. The local access points may communicate with a mobile device within the corresponding local access point communication range. The wireless network further includes an access point configured as a master access point to communicate with each of the plurality of local access points at a frequency that is outside the set of frequencies of the local access points.

Abstract: A method for radio frequency multicasting and a multicast site architecture are provided. The method includes assigning a different traffic multicast Internet Protocol (IP) address to each of a plurality of groups of LMR users and encapsulating the LMR content within IP packets. The method further includes transmitting the IP packets to one of the plurality of groups of LMR users using at least one of the assigned traffic multicast IP addresses.

Abstract: A method for radio frequency multicasting and a multicast site architecture are provided. The method includes assigning a different traffic multicast Internet Protocol (IP) address to each of a plurality of groups of LMR users and encapsulating the LMR content within IP packets. The method further includes transmitting the IP packets to one of the plurality of groups of LMR users using at least one of the assigned traffic multicast IP addresses.

Abstract: A method for distributing encryption keys for use in communication systems such as trunked radio communication systems. Group traffic keys are encrypted at a key administrator and passed to a distribution facility for storage and distribution. The distribution facility passes the encrypted group traffic key to communication devices where the group traffic keys are decrypted and used to encrypt/decrypt traffic.

Abstract: A microphone unit comprising a voice input for receiving a voice input signal, an analog to digital converter for creating a digital signal from voice signal, a voice coding device for creating a voice coded signal output from the digital signal, encryption means for encrypting the voice coded signal, and a modulator for generating a transmittable signal that can be supplied to a radio via the microphone input. Additionally, the microphone unit is capable of performing the steps in reverse upon receiving an encrypted signal. The received signal output from the radio is demodulated, un-encrypted, voice decoded, converted from a digital voice signal to an analog voice signal, and output via a speaker which is preferably built into the microphone unit.

Abstract: A method for radio frequency multicasting and a multicast site architecture are provided. The method includes assigning a different traffic multicast Internet Protocol (IP) address to each of a plurality of groups of LMR users and encapsulating the LMR content within IP packets. The method further includes transmitting the IP packets to one of the plurality of groups of LMR users using at least one of the assigned traffic multicast IP addresses.

Abstract: A transcoder architecture and method for transcoding in land mobile radio (LMR) systems are provided. The LMR system includes a first communication site configured to communicate using a first LMR communication protocol and a second communication site configured to communicate using a second LMR communication protocol. The LMR system further includes a transcoder configured to receive LMR content from the first communication site communicated using the first LMR communication protocol and digitally convert the LMR content to the second LMR communication protocol to be communicated to the second communication site.

Abstract: A multiple protocol land mobile radio (LMR) and a method for communicating LMR content are provided. The method includes communicating the LMR content using a plurality of LMR transport protocols within a single LMR network. The method further includes encapsulating the LMR content based on an LMR application layer protocol for a portion of the single LMR network through which the LMR content is to be communicated.